WO2022037409A1 - 回油管、分离器及制冷系统 - Google Patents

回油管、分离器及制冷系统 Download PDF

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Publication number
WO2022037409A1
WO2022037409A1 PCT/CN2021/110469 CN2021110469W WO2022037409A1 WO 2022037409 A1 WO2022037409 A1 WO 2022037409A1 CN 2021110469 W CN2021110469 W CN 2021110469W WO 2022037409 A1 WO2022037409 A1 WO 2022037409A1
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WO
WIPO (PCT)
Prior art keywords
bracket
separator
pipe
casing
oil return
Prior art date
Application number
PCT/CN2021/110469
Other languages
English (en)
French (fr)
Inventor
周其
姚海勇
Original Assignee
浙江盾安人工环境股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202021772682.5U external-priority patent/CN213687381U/zh
Priority claimed from CN202021773208.4U external-priority patent/CN213578240U/zh
Application filed by 浙江盾安人工环境股份有限公司 filed Critical 浙江盾安人工环境股份有限公司
Publication of WO2022037409A1 publication Critical patent/WO2022037409A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant

Definitions

  • the present application relates to the field of refrigeration technology, and in particular, to an oil return pipe, a separator and a refrigeration system.
  • the separator is installed in the refrigeration system, such as an oil separator or a gas-liquid separator.
  • the separator includes an oil return pipe, and the oil return pipe can return the separated lubricating oil to the compressor.
  • the existing oil return pipe is L-shaped, and the L-shaped oil return pipe has the problem of stress concentration, and the compressor of the refrigeration system will vibrate during operation. During the long-term operation, the oil return pipe is prone to breakage.
  • an oil return pipe is provided.
  • An oil return pipe is connected to a separator body, the separator body comprises a casing and an air outlet pipe connected to the casing, the oil return pipe comprises a connecting pipe and a main pipe that are connected to each other, and one end of the connecting pipe It extends into the casing, and the other end is connected with the main body pipe, and the main body pipe is U-shaped.
  • the radian of the bottom of the U-shaped oil return pipe is relatively large.
  • the U-shaped oil return pipe can disperse the stress. Alleviate the problem of stress concentration, thereby increasing the reliability of the oil return pipe and prolonging the service life of the oil return pipe.
  • the axis of the connecting pipe is inclined relative to the axis of the casing.
  • the inclined arrangement of the connecting pipe can increase the distance between the connecting pipe and the air outlet pipe.
  • the included angle between the axis of the connecting pipe and the axis of the casing ranges from 56° to 64°. In this way, not only can welding be facilitated, but also the lubricating oil can smoothly flow into the connecting pipe.
  • a positioning protrusion is provided on the outer side wall of the connecting pipe, and the positioning protrusion is located in the casing and abuts against the casing.
  • the positioning protrusion has a positioning function, and when welding the connecting pipe, the installer can know the length of the extension.
  • the positioning protrusions there are a plurality of the positioning protrusions, and the plurality of the positioning protrusions are evenly distributed along the circumferential direction of the connecting pipe.
  • a plurality of positioning protrusions can effectively perform positioning.
  • the depth of the connecting pipe inserted into the casing is greater than or equal to twice the wall thickness of the casing. In this way, only the lubricating oil can be allowed to enter the oil return pipe, and the impurities at the bottom of the separator can be prevented from entering the oil return pipe together with the lubricating oil.
  • the main body pipe includes an outlet pipe, and the inclination angle of the axis of the outlet pipe relative to the axis of the casing is less than or equal to 5°.
  • the outlet pipe can be installed in alignment with the compressor.
  • the main body tube includes an outlet tube, and the axis of the outlet tube is arranged parallel to the axis of the housing.
  • the outlet pipe can be kept horizontal, which is convenient for docking with the compressor.
  • a separator includes a separator body and the above-mentioned oil return pipe, wherein the oil return pipe is connected to the separator body.
  • the separator body includes a casing, a first filter assembly and a second filter assembly, the first filter assembly and the second filter assembly are arranged in the casing, and the first filter assembly includes The first support, the second filter assembly includes a second support, and the first support and the second support are arranged at intervals; the first support and/or the second support include a main body portion and an additional support that are connected to each other. Thick part, the thickness of the thickened part is larger than that of the main body part.
  • the thickened portion can clamp the inner wall of the housing without manual hand-holding, which is convenient for welding, can reduce labor costs, and can Clamp the filler between the second filter assembly and the first filter assembly.
  • the thickened portion is annular and distributed around the circumference of the body portion. In this way, the stability and reliability of the clamping can be enhanced.
  • the first bracket and/or the second bracket includes a side edge connected to the body portion, and the side edge is folded to form the thickened portion. In this way, the process flow can be simplified.
  • the first bracket includes a main body portion and a thickened portion that are connected to each other, a groove is formed on the side surface of the main body portion of the first bracket close to the second bracket, and the separator is further A filter element is included, the filter element is arranged between the first filter assembly and the second filter assembly, and the filter element is partially in contact with the groove wall of the groove. There is a space for storing gas in the groove, and the gas forms pressure to help the liquid substance sink.
  • the filter element is a stainless steel wire filter element.
  • the stainless steel wire filter element can not only strengthen the corrosion resistance of the filter mechanism, but also has a high hardness, which can reduce the flow rate of liquid substances and effectively achieve gas-liquid separation.
  • a side surface of the body portion of the first bracket away from the second bracket is provided with a first blocking portion, and the first blocking portion is adapted to the groove, and the first blocking portion is adapted to the groove.
  • the body portion of the bracket is provided with a plurality of first through holes, and the plurality of first through holes are arranged around the first blocking portion. The first blocking portion can block the fluid, reduce the flow rate of the liquid substance, and realize preliminary gas-liquid separation.
  • a plurality of second through holes are opened on the body portion of the second bracket, and a second blocking portion is provided on the side surface of the body portion of the second bracket away from the first bracket, so The second blocking portion is arranged at the orifice of the second through hole, one end of the second blocking portion is connected to the body portion of the second bracket, and the other end extends away from the first bracket .
  • the second blocking portion can further reduce the fluid flow rate and play a guiding role for the fluid.
  • the body portion of the second bracket is provided with a third blocking portion on the side of the first bracket close to the first bracket, and the third blocking portion is located at the opening of the second through hole, so One end of the third blocking portion is connected with the body portion of the second bracket, and the other end extends toward the direction close to the first bracket.
  • the third blocking portion can also reduce the fluid flow rate and further realize gas-liquid separation.
  • both the second blocking portion and the third blocking portion are arc-shaped, and the inner concave surface of the second blocking portion is disposed opposite to the inner concave surface of the third blocking portion, and the The outer convex surface of the second blocking portion is away from the first bracket, and the outer convex surface of the third blocking portion faces the first bracket. In this way, the flow pressure loss of the fluid can be reduced, and the small particle oil droplets can be collected.
  • the second blocking portion has a first end and a second end, the first end is connected to the second bracket, and the second end faces a direction away from the first bracket Extending, the distance between the center point of the end face of the first end and the axis of the casing is less than or equal to the distance between the center point of the end face of the second end and the axis of the casing; the first The third stopper has a third end and a fourth end, the third end is connected to the second bracket, the fourth end extends toward the direction close to the first bracket, and the end face of the fourth end is The distance between the center point and the axis of the housing is less than or equal to the distance between the center point of the third end face and the axis of the housing. In this way, when the liquid substance flows out of the second through hole, its flow direction deviates from the air outlet pipe, thereby preventing the liquid substance from entering the air outlet pipe.
  • a refrigeration system includes the above-mentioned separator.
  • FIG. 1 is a schematic structural diagram of a separator provided by the application.
  • Fig. 2 is the partial enlarged view of A place in Fig. 1;
  • FIG. 3 is a schematic structural diagram of a first filter assembly of one of the embodiments provided by the application.
  • FIG. 4 is a schematic structural diagram of a first filter assembly of another embodiment provided by the application.
  • Fig. 6 is the D-D direction sectional view in Fig. 5;
  • FIG. 8 is a sectional view taken along the line B-B in FIG. 7;
  • Fig. 9 is the C-C direction sectional view in Fig. 7;
  • Figure 10 is a front view of the oil return pipe provided by the application.
  • Figure 11 is a left side view of the oil return pipe provided by the application.
  • Figure 12 is a bottom view of the oil return pipe provided by the application.
  • FIG. 13 is a schematic structural diagram of the refrigeration system provided by the application.
  • a component when referred to as being “mounted on” another component, it can be directly on the other component or there may also be an intervening component.
  • a component When a component is considered to be “set on” another component, it may be directly set on the other component or there may be a co-existing centered component.
  • a component When a component is said to be “fixed” to another component, it may be directly fixed to the other component or there may also be an intervening component.
  • the separator 100 provided in the present application is used to separate the lubricating oil brought into the refrigeration system by the refrigerant, and then return it to the compressor 200 .
  • the separator 100 is an oil separator, and in other embodiments, the separator 100 may also be a gas-liquid separator.
  • the gas-liquid mixed refrigerant enters the gas-liquid separator with the lubricating oil, and the gaseous refrigerant is separated from the liquid refrigerant and the liquid lubricating oil.
  • the liquid refrigerant and the liquid lubricating oil are stored in layers at the bottom of the gas-liquid separator due to their different densities.
  • the lubricating oil is sent back to the compressor, and the gaseous refrigerant enters the pipeline of the refrigeration system to work.
  • the following fluid refers to the mixture of refrigerant and lubricating oil
  • liquid substance refers to the mixture of lubricating oil and liquid refrigerant
  • gaseous substance refers to gaseous refrigerant.
  • the separator 100 includes a separator body 101 , and the separator body 101 includes a casing 10 and an air outlet pipe 20 .
  • the casing 10 is hollow to form an inner cavity 11 , and a part of the air outlet pipe 20 extends into the inner cavity 11 . , the other part protrudes out of the casing 10 .
  • the housing 10 includes a first cylinder 12 and a second cylinder 13 , one end of the first cylinder 12 is flared toward one end of the second cylinder 13 , and one end of the second cylinder 13 is inserted into the first cylinder 12 ,
  • the second cylindrical body 13 and the first cylindrical body 12 are fixed by welding.
  • connection port 121 One end of the first cylinder 12 away from the second cylinder 13 is provided with a connection port 121 , and the connection port 121 communicates with the inner cavity 11 .
  • the end of the second cylinder body 13 away from the first cylinder body 12 is provided with a first installation port 131 and a second installation port 132 , the air outlet pipe 20 passes through the first installation port 131 , and the second installation port 132 is close to the first installation port 132 .
  • An installation port 131 is provided.
  • the air outlet pipe 20 is U-shaped, which can not only alleviate the problem of stress concentration, but also facilitate the installation personnel to connect with other pipelines.
  • the air outlet pipe 20 includes a first straight pipe 21, a first curved pipe 22 and a second straight pipe 23.
  • the first straight pipe 21, the first curved pipe 22 and the second straight pipe 23 are connected in sequence to form a U shape.
  • One end of the 21 extends into the inner cavity 11 , and the other end extends out of the inner cavity 11 to be connected to the first elbow 22 .
  • the axis of the first straight pipe 21 coincides with the axis of the housing 10 .
  • the separator body 101 further includes a filter mechanism 30, which is arranged in the inner cavity 11 and plays the role of filtering impurities and separating liquid and gaseous substances.
  • the filter mechanism 30 includes a first filter element 31 and a second filter element 32.
  • the first filter element 31 and the second filter element 32 are both disposed in the housing 10 and spaced apart from each other.
  • the first filter element 31 includes a first support 311 and a first filter screen 312, the first filter screen 312 is semicircular and fixed on the first support 311;
  • the second filter element 32 includes a second support 321 and a second filter screen 322 , the second filter screen 322 is semicircular and fixed on the second bracket 321 .
  • Both the first bracket 311 and the second bracket 321 are in the shape of " ⁇ ".
  • the first bracket 311 is provided with a first fixing structure 313, the first fixing structure 313 is annular, and the edge of the first filter screen 312 is inserted under the first fixing structure 313 to be fixed on the first bracket 311; on the second bracket 321 A second fixing structure 327 is provided, the second fixing structure 327 is annular, and the edge of the second filter screen 322 is arranged under the second fixing structure 327 so as to be fixed on the first bracket 311 .
  • both the first bracket 311 and the second bracket 321 include a main body portion 3111 and a thickened portion 3112 , or the first bracket 311 includes a main body portion 3111 and a thickened portion 3112 , or the second bracket 321 It includes a body portion 3111 and a thickened portion 3112 , the body portion 3111 and the thickened portion 3112 are directly or indirectly connected, and the thickness D 1 of the thickened portion 3112 is greater than the wall thickness D 2 of the body portion 3111 .
  • the first bracket 311 and/or the second bracket 321 can be tightly fitted with the inner wall of the housing 10, and manual hand-holding is not required during welding, the installation efficiency can be enhanced, the labor cost can be reduced, and the following
  • the filter element 33 is fixed to the filter element 33 .
  • the first bracket 311 and/or the second bracket 321 includes a side edge 3113 , the side edge 3113 is disposed around the circumference of the body portion 3111 , and the thickened portion 3112 is directly thickened by the side edge 3113 form.
  • the first bracket 311 and/or the second bracket 321 includes a side edge 3113 , the side edge 3113 is disposed around the circumference of the body portion 3111 , and one end of the side edge 3113 is folded to form a folded edge segment 3114, the unfolded side edge 3113 and the folded edge segment 3114 are superimposed to form a thickened portion 3112.
  • the hemming section 3114 can be in contact with the main body 3111, or can be arranged at intervals, as long as it can play a thickening effect, the side edge 3113 can be folded toward the inner wall of the housing 10 to form the hemming section 3114, or it can be oriented away from The inner wall of the casing 10 is folded in the direction to form a folded section 3114 .
  • the thickened portion 3112 is annular and disposed around the circumference of the body portion 3111 to enhance the stability and reliability of the abutment between the filter mechanism 30 and the inner wall of the housing 10 .
  • the body portion 3111 of the first bracket 311 defines a plurality of first through holes 315 , the plurality of first through holes 315 communicate with the inner cavity 11 , and the body portion 3111 of the first bracket 311 is far away from
  • the side of the second bracket 321 is provided with a first blocking portion 316 , and a plurality of first through holes 315 are arranged around the circumference of the first blocking portion 316 .
  • the first blocking portion 316 has a blocking effect on the fluid and can help liquid substances in the fluid. It is separated from the gaseous substance, and plays a guiding role for the liquid substance, so that the liquid substance flows into the first through hole 315 .
  • the side of the first blocking portion 316 facing the first filter screen 312 is a spherical surface, and the spherical surface has a better guiding effect on the fluid and can reduce the pressure loss when the fluid flows.
  • the body portion 3111 of the second bracket 321 defines a plurality of second through holes 323 , the second through holes 323 communicate with the inner cavity 11 , and the body portion 3111 of the second bracket 321 is close to the first bracket
  • the side of the 311 is provided with a second blocking portion 325.
  • the second blocking portion 325 is located at the opening of the second through hole 323.
  • One end of the second blocking portion 325 is connected to the body portion 3111 of the second bracket 321, and the other end faces away from the A bracket 311 extends in the direction to partially block the second through hole 323 .
  • the second blocking portion 325 can change the flow direction of the fluid, further reduce the flow rate of the fluid, separate the gaseous substance and the liquid substance in the fluid, and play a guiding role for the fluid.
  • the second blocking portion 325 has a first end 3251 and a second end 3252 , the first end 3251 is connected to the second bracket 321 , and the second end 3252 extends away from the first bracket 311 .
  • the distance L 1 between the center point of the end surface of the first end 3251 and the axis of the housing 10 is less than or equal to the distance L 2 between the center point of the end surface of the second end 3252 and the axis of the housing 10 , that is,
  • the distance L 1 between the center point of the end face of the first end 3251 and the axis of the first straight pipe 21 is smaller than the distance L 2 between the center point of the end face of the second end 3252 and the first straight pipe 21 , so that the liquid substance is When flowing out of the second through hole 323 , its flow direction deviates from the air outlet pipe 20 , thereby preventing liquid substances from entering the air outlet pipe 20 .
  • the side of the body portion 3111 of the second bracket 321 away from the first bracket 311 is provided with a third blocking portion 326 .
  • the other end of the body portion 3111 of the bracket 321 extends toward the direction close to the first bracket 311 to partially block the second through hole 323 .
  • the third blocking portion 326 can also reduce the flow velocity of the fluid, so that the gaseous substances in the fluid are separated from the liquid substances.
  • the third blocking portion 326 has a third end 3261 and a fourth end 3262, the third end 3261 is connected to the second bracket 321, the fourth end 3262 extends toward the direction close to the first bracket 311, and the center of the end surface of the fourth end 3262
  • the distance L 4 between the point and the axis of the housing 10 is less than or equal to the distance L 3 between the center point of the end face of the third end 3261 and the axis of the housing 10 , that is, the center point of the end face of the fourth end 3262 and the first
  • the distance L 4 between the axes of the straight pipes 21 is smaller than the distance L 3 between the center point of the end face of the third end 3261 and the first straight pipe 21 , so that when the liquid substance flows into the second through hole 323 , its flow direction deviates Outlet tube 20.
  • the distances L 1 , L 2 , L 3 and L 4 are vertical distances.
  • the distance from the center point of the end face of the first end 3251 to the axis of the housing 10 is the first end 3251
  • the length of the vertical line formed by connecting the center point of the end face with the axis of the housing 10 is the same for the second end 3252 , the third end 3261 and the fourth end 3262 .
  • the second blocking portion 325 is arc-shaped.
  • the arc-shaped second blocking portion 325 has an inner concave surface 3253 and an outer convex surface 3254.
  • the inner concave surface 3253 of the second blocking portion 325 is disposed toward the first bracket 311.
  • 3254 is far away from the first bracket 311, that is to say, the side of the arc-shaped second blocking portion 325 facing the first bracket 311 is recessed relative to the second bracket 321, and the side of the arc-shaped second blocking portion 325 away from the first bracket 311 is relatively opposite to the second bracket 321.
  • the two brackets 321 protrude; the third blocking portion 326 is arc-shaped, the arc-shaped third blocking portion 326 has an inner concave surface 3253 and an outer convex surface 3254 , the inner concave surface 3253 of the third blocking portion 326 and the inner concave surface of the second blocking portion 325 3253 are arranged opposite to each other, the convex surface 3254 of the third blocking portion 326 faces the first bracket 311, that is to say, the arc-shaped third blocking portion 326 is concave relative to the second bracket 321 away from the side of the first bracket 311.
  • the portion 326 protrudes toward the side of the first bracket 311 relative to the second bracket 321 .
  • the outer convex surface 3254 of the arc-shaped third blocking portion 326 can reduce the flow resistance of liquid substances, and the inner concave surface 3253 of the arc-shaped second blocking portion 325 can gather small oil droplets to improve the oil separation effect.
  • the four second through holes 323 are evenly distributed along the circumferential direction of the second bracket 321 , and the second blocking portion 325 and the third blocking portion 326 They are all 1/4 spherical, so set up, the third blocking part 326 can better block the flow, so that the gaseous substances in the fluid are separated from the liquid substances, and the second blocking part 325 can better gather the oil droplets.
  • the second blocking portion 325 and the third blocking portion 326 do not block the second through hole 323 too much, thereby reducing the flow area of the second through hole 323 , thereby affecting the fluid flow.
  • the filter mechanism 30 further includes a filter element 33, and the filter element 33 is arranged between the first filter assembly 31 and the second filter assembly 32. Specifically, the filter element 33 is located between the first support 311, the second filter screen 322 and the second support 321, The second filter screen 322 plays a supporting role for the filter element 33 , and at the same time, the thickened portion 3112 can clamp the filter element 33 and play a fixed supporting role for the filter element 33 .
  • the filter element 33 is a stainless steel wire SUS filter element.
  • the stainless steel wire not only has wear resistance, but also has strong hardness, which can reduce the flow rate of liquid substances and effectively realize gas-liquid separation.
  • a groove 317 is defined on the side of the body portion 3111 of the first bracket 311 facing the second bracket 321 .
  • the groove 317 is adapted to the first blocking portion 316 , that is, the groove 317 is located in the first blocking portion.
  • the filter element 33 is in contact with the groove wall part of the groove 317, so that a cavity 318 is formed between the filter element 33 and the groove wall of the groove 317, that is, the filter element 33 is partially squeezed into the groove 317 and not completely.
  • the groove 317 is filled so that gas remains in the cavity 318 to form a certain pressure, which can help the liquid substance to sink.
  • the filter mechanism 30 is installed in the inner cavity 11, the thickened portion 3112 on the first bracket 311 and/or the second bracket 321 is clamped to the inner wall of the housing 10, and then the filter element 33 is clamped, and then the Welding, without manual support, can reduce labor costs and improve installation efficiency.
  • the fluid enters from the intake pipe 50, filters out some impurities through the first filter screen 312, and then passes through the first blocking portion 316 to block the flow direction of the fluid, the flow rate decreases, and some gaseous substances and liquids in the fluid
  • the material is separated to achieve the preliminary separation effect; the fluid enters the filter element 33 from the first through hole 315. Due to the blocking of the filter element 33, the flow rate of the fluid further decreases, and the gaseous material floats up to realize the secondary separation of the liquid material and the gaseous material; the separated liquid
  • the substance and the fluid that has not been separated enter the second filter assembly 32. Due to the blocking of the third blocking portion 326, the flow rate is further reduced, and the third separation is realized.
  • the other part flows out and is stored in the bottom of the separator body 101 , and the lubricating oil enters the oil return pipe 30 and returns to the compressor 200 .
  • the separator 100 further includes an oil return pipe 40 , one end of the oil return pipe 40 is connected to the second installation port 132 , and the other end is connected to the compressor 200 , so as to lubricate the oil stored at the bottom of the separator body 101 .
  • the oil is directed back into the compressor 200 .
  • the oil return pipe 40 includes a connecting pipe 41 and a main pipe 42 , the connecting pipe 41 and the main pipe 42 are connected to each other, the connecting pipe 41 is connected to the second installation port 132 , and the main pipe 42 is U-shaped. It can be understood that the arc of the bottom of the U-shaped main body pipe 42 is relatively large. When the separator 100 operates in a vibrating environment, it can disperse stress and alleviate the stress concentration problem, thereby increasing the service life of the separator 100 .
  • the axis of the connecting pipe 41 is inclined relative to the axis of the housing 10, that is, the axis of the second installation port 132 is inclined relative to the axis of the first installation port 131, and the opening of the second installation port 132 is far away from the first installation port 131.
  • the opening of the installation port 131 can increase the distance between the gas outlet pipe 20 outside the casing 10 and the oil return pipe 40 during installation, so as to facilitate on-site installation. If the distance between the oil return pipe 40 and the gas outlet pipe 20 is too close, the When installed, the welding torch is susceptible to interference, resulting in blind spots for welding.
  • the included angle ⁇ between the axis of the connecting pipe 41 and the axis of the housing 10 is between 56° and 64°. It can be understood that, by setting in this way, the oil return pipe 40 and the air outlet pipe 20 can be kept at a certain distance, and the lubricating oil can be smoothly returned. If the included angle ⁇ between the axis of the connecting pipe 41 and the axis of the housing 10 is too large, the flow resistance of the lubricating oil will increase, thus causing the lubricating oil to accumulate in the connecting pipe 41 .
  • the included angle ⁇ between the axis of the connecting pipe 41 and the axis of the housing 10 may be any value between 56°, 58°, 60°, 64° or 56° to 64°.
  • a positioning protrusion 411 is provided on the outer side wall of the connecting pipe 41 , the positioning protrusion 411 is arranged in the inner cavity 11 , and the positioning protrusion 411 is used for positioning the connecting pipe 41 , and the positioning protrusion 411 abuts against the At the orifice of the second installation port 132 .
  • the positioning protrusion 411 plays a positioning role, so that the installer knows how much depth to insert.
  • the multiple positioning protrusions 411 are evenly distributed along the circumferential direction of the connecting pipe 41 to increase the reliability of positioning.
  • there are two positioning protrusions 411 and the two positioning protrusions 411 are disposed opposite to each other.
  • the positioning protrusions 411 may be one or three or more. The number of pieces is limited, as long as the connecting pipe 41 can be positioned.
  • the depth L 5 of the connecting pipe 41 protruding into the inner cavity 11 is greater than or equal to twice the wall thickness of the housing 10 , that is, the side where the positioning protrusion 411 abuts the inner wall of the housing 10 to the connection
  • the distance L 5 between the end faces of the end of the tube 41 located inside the casing 10 is equal to twice the wall thickness of the casing 10 .
  • the depth L5 of the cavity 11 is set to be twice the wall thickness of the casing 10, which can prevent impurities from entering the connecting pipe 41 and entering the compressor 200, thereby preventing the compressor 200 from being stuck.
  • the main body pipe 42 includes a third straight pipe 421, an outlet pipe 423 and a second curved pipe 422.
  • One end of the third straight pipe 421 is connected to the connecting pipe 41, and the other end is connected to the second curved pipe 422.
  • the second curved pipe 422 is far from the first pipe.
  • One end of the three straight pipes 421 is connected to the outlet pipe 423 , and the third straight pipe 421 , the second curved pipe 422 and the outlet pipe 423 are connected in sequence to form a U shape.
  • the first elbow 22 and the second elbow 422 are both elbows and do not include straight pipe sections, that is, the main body pipe 42
  • the main body pipe 42 It is a "U" shape instead of a "B" shape, and the bottom of the U shape is shorter in length, that is, the lengths of the first elbow 22 and the second elbow 422 are shorter, and are less affected by vibration.
  • the bottom of the main body pipe 42 may also include a straight pipe section.
  • the axis of the outlet pipe 423 is inclined at an angle of less than or equal to 5° with respect to the axis of the casing 10 , that is, when the separator 100 is installed vertically, the end face of the nozzle of the outlet pipe 423 and the casing 10
  • the included angle ⁇ of the axis of the tube is in the range of 85° to 95°.
  • the axis of the outlet pipe 423 is approximately parallel to the axis of the casing 10.
  • the angle at which the axis of the outlet pipe 423 is inclined relative to the axis of the casing 10 can be 1°, 3°, 5° or any value between 0° and 5°, and the orifice of the outlet pipe 423 can be oriented away from the casing 10
  • the direction of the axis is inclined, and may be inclined away from the direction of the axis of the casing 10 .
  • the axis of the outlet pipe 423 is arranged in parallel with the axis of the casing 10 , which further facilitates the butt connection between the installer and the compressor 200 .
  • One end of the outlet pipe 423 away from the second elbow 422 is flared, that is, the inner diameter of the flared part of the outlet pipe 423 is larger than the inner diameter of other parts of the main pipe 42, so as to facilitate the installation personnel to directly insert the installation pipe of the compressor 200.
  • the oil return pipe 40 is integrally formed to reduce the welding process.
  • the present application further provides a refrigeration system 1000 , and the refrigeration system 1000 includes the above-mentioned separator 100 .
  • the refrigerant enters the inner cavity 11 with the lubricating oil and impurities from the intake pipe 50.
  • the refrigerant is slowly separated from the lubricating oil and impurities. After being filtered by the filter screen 30, a part of the impurities is removed After filtering out, another part of the impurities enters the bottom of the separator 100 , the lubricating oil is stored in the bottom of the separator 100 , and then flows back to the compressor 200 through the oil return pipe 40 .
  • the refrigerant is in a mixed state of gas and liquid, during the falling process of the refrigerant, the liquid refrigerant and the gaseous refrigerant are gradually separated, and the gaseous refrigerant enters the air outlet pipe 20 and flows out into the refrigeration system 1000 to work.

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Abstract

一种回油管(40)、分离器(100)及制冷系统(1000)，回油管(40)连接于分离器本体(101)，包括壳体(10)及连接于壳体(10)的出气管(20)，回油管(40)包括相互连接的连接管(41)及主体管(42)，连接管(41)的一端伸入壳体(10)内，另一端与主体管(42)连接，主体管(42)呈U型。

Description

回油管、分离器及制冷系统
相关申请
本申请要求2020年8月21日申请的，申请号为202021773208.4，发明名称为“回油管、分离器及制冷系统”，以及2020年8月21日申请的，申请号为202021772682.5，发明名称为“分离器及制冷系统”中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及制冷技术领域，特别是涉及回油管、分离器及制冷系统。
背景技术
分离器安装于制冷系统中，例如油分离器或气液分离器，分离器包括回油管，回油管能够将分离出的润滑油送回至压缩机内。
现有的回油管呈L型，L型的回油管存在应力集中问题，制冷系统的压缩机运行时会产生振动，在长期的运行过程中，回油管容易发生断裂。
发明内容
根据本申请的各种实施例，提供一种回油管。
一种回油管，连接于分离器本体，所述分离器本体包括壳体及连接于所述壳体的出气管，所述回油管包括相互连接的连接管及主体管，所述连接管的一端伸入所述壳体内，另一端与所述主体管连接，所述主体管呈U型。
本申请提供的回油管，通过将回油管的主体管设置为U型，U型的回油管底部的弧度较大，当回油管在振动的环境中运行时，U型的回油管能够分散应力，缓解应力集中问题，从而能够增加回油管的可靠性，延长回油管的使用寿命。
于本申请一实施例中，所述连接管的轴线相对所述壳体的轴线倾斜设置。连接管倾斜设置能够增加连接管与出气管的距离，在焊接时，连接管与壳体的焊接处的开口远离出气管与壳体的焊接处，方便用户焊接，避免造成焊接盲点。
于本申请一实施例中，所述连接管的轴线与所述壳体的轴线之间的夹角的范围为56°至64°。如此，既能够方便焊接，又能够使润滑油顺利地流入连接管内。
于本申请一实施例中，所述连接管的外侧壁上设有定位凸起，所述定位凸起位于所述壳体内并抵接于所述壳体。所述定位凸起具有定位作用，在焊接所述连接管时，安装人员 能够知道伸入的多少长度。
于本申请一实施例中，所述定位凸起为多个，多个所述定位凸起沿着所述连接管的周向均匀分布。多个定位凸起能够有效地进行定位。
于本申请一实施例中，所述连接管插入所述壳体内的深度大于或等于所述壳体壁厚的两倍。如此，能够只让润滑油进入所述回油管，防止位于分离器底部的杂质随着润滑油一起进入所述回油管。
于本申请一实施例中，所述主体管包括出口管，所述出口管的轴线相对所述壳体的轴线的倾斜角度小于或等于5°。在所述分离器竖直安装时，所述出口管能够对准压缩机进行安装。
于本申请一实施例中，所述主体管包括出口管，所述出口管的轴线与所述壳体的轴线平行设置。在分离器竖直安装时，出口管能够保持水平，方便与压缩机对接。
一种分离器，包括分离器本体及上述的回油管，所述回油管连接于所述分离器本体。
于本申请一实施例中，分离器本体包括壳体、第一过滤组件及第二过滤组件，所述第一过滤组件及第二过滤组件设于所述壳体内，所述第一过滤组件包括第一支架，所述第二过滤组件包括第二支架，所述第一支架与所述第二支架间隔设置；所述第一支架及/或所述第二支架包括相互连接的本体部和加厚部，所述加厚部的壁厚大于本体部的壁厚。在安装所述第一过滤组件及/或所述第二过滤组件时，所述加厚部能够卡持所述壳体的内壁，不需要人工手扶，方便焊接，能够减少人力成本，并且能够卡紧第二过滤组件与第一过滤组件之间的填充物。
于本申请一实施例中，所述加厚部呈环形并环绕所述本体部的周向分布。如此，能够加强卡持的稳定性及可靠性。
于本申请一实施例中，所述第一支架及/或所述第二支架包括与所述本体部连接的侧边，所述侧边折边以形成所述加厚部。如此，能够简化工艺流程。
于本申请一实施例中，所述第一支架包括相互连接的本体部及加厚部，所述第一支架的本体部靠近所述第二支架的侧面开设有凹槽，所述分离器还包括滤芯，所述滤芯设于所述第一过滤组件与所述第二过滤组件之间，所述滤芯与所述凹槽的槽壁之间部分接触。所述凹槽内具有存储气体的空间，气体形成压力，助于液态物质下沉。
于本申请一实施例中，所述滤芯为不锈钢丝滤芯。不锈钢丝滤芯不仅能够加强过滤机构的耐腐蚀性，且不锈钢丝硬度大，能够降低液态物质的流速，有效地实现气液分离。
于本申请一实施例中，所述第一支架的本体部远离所述第二支架的侧面设有第一挡部，所述第一挡部与所述凹槽相适配，所述第一支架的本体部开设有多个第一通孔，多个所述 第一通孔环绕所述第一挡部设置。第一挡部能够对于流体起到阻挡作用，降低液态物质的流速，实现初步气液分离。
于本申请一实施例中，所述第二支架的本体部上开设有多个第二通孔，所述第二支架的本体部远离所述第一支架的侧面设有第二挡部，所述第二挡部设于所述第二通孔的孔口处，所述第二挡部的一端与所述第二支架的本体部连接，另一端朝着远离所述第一支架的方向延伸。第二挡部能够进一步降低流体流速，且对于流体起到导流作用。
于本申请一实施例中，所述第二支架的本体部靠近所述第一支架的侧面设有第三挡部，所述第三挡部设于所述第二通孔孔口处，所述第三挡部的一端与所述第二支架的本体部连接，另一端朝着靠近所述第一支架的方向延伸。第三挡部同样能够降低流体流速，进一步实现气液分离。
于本申请一实施例中，所述第二挡部及所述第三挡部均呈弧形，所述第二挡部的内凹面与所述第三挡部的内凹面相对设置，所述第二挡部的外凸面远离所述第一支架，所述第三挡部的外凸面朝向所述第一支架。如此，能够降低流体的流动压力损失，且能够聚集小颗粒油滴。
于本申请一实施例中，所述第二挡部具有第一端及第二端，所述第一端与所述第二支架连接，所述第二端朝向远离所述第一支架的方向延伸，所述第一端的端面的中心点与所述壳体的轴线之间的距离小于或等于所述第二端的端面的中心点与所述壳体的轴线之间的距离；所述第三挡部具有第三端及第四端，所述第三端与所述第二支架连接，所述第四端朝向靠近所述第一支架的方向延伸，并且，所述第四端端面的中心点与所述壳体的轴线之间的距离小于或等于所述第三端端面的中心点与所述壳体的轴线之间的距离。如此，以使液态物质在流出第二通孔时，其流动方向偏离出气管，从而防止液态物质进入出气管内。
一种制冷系统，包括上述的分离器。
附图说明
图1为本申请提供的分离器的结构示意图；
图2为图1中的A处的局部放大图；
图3为本申请提供的其中一个实施例的第一过滤组件的结构示意图；
图4为本申请提供的另外一个实施例的第一过滤组件的结构示意图；
图5为本申请提供的第一过滤组件的俯视图；
图6为图5中的D-D向剖视图；
图7为本申请提供的第二过滤组件的俯视图；
图8为图7中的B-B向剖视图；
图9为图7中的C-C向剖视图；
图10为本申请提供的回油管的主视图；
图11为本申请提供的回油管的左视图；
图12为本申请提供的回油管的仰视图；
图13为本申请提供的制冷系统的结构示意图。
主要元件标号说明：1000、制冷系统；100、分离器；101、分离器本体；10、壳体；11、内腔；12、第一筒体；121、连接口；13、第二筒体；131、第一安装口；132、第二安装口；20、出气管；21、第一直管；22、第一弯管；23、第二直管；30、过滤机构；31、第一过滤组件；311、第一支架；3111、本体部；3112、加厚部；3113、侧边；3114、折边段；312、第一过滤网；313、第一固定结构；315、第一通孔；316、第一挡部；317、凹槽；318、腔体；32、第二过滤组件；321、第二支架；322、第二过滤网；323、第二通孔；325、第二挡部；3251、第一端；3252、第二端；3253、内凹面；3254、外凸面；326、第三挡部；3261、第三端；3262、第四端；327、第二固定结构；33、滤芯；40、回油管；41、连接管；411、定位凸起；42、主体管；421、第三直管；422、第二弯管；423、出口管；50、进气管；200、压缩机。
如下具体实施方式将结合上述附图进一步说明本申请。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明的是，当组件被称为“装设于”另一个组件，它可以直接在另一个组件上或者也可以存在居中的组件。当一个组件被认为是“设置于”另一个组件，它可以是直接设置在另一个组件上或者可能同时存在居中组件。当一个组件被认为是“固定于”另一个组件，它可以是直接固定在另一个组件上或者可能同时存在居中组件。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。本文所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。
本申请提供的分离器100，用于将被制冷剂带入制冷系统中的润滑油分离出来后，送回至压缩机200内。在本实施例中，分离器100为油分离器，在其他实施例中，分离器100还可为气液分离器。气液混合的制冷剂带着润滑油进入气液分离器，气态制冷剂与液态制冷剂及液态润滑油分离，液态制冷剂与液态润滑油由于密度不同而分层存储在气液分离器底部，润滑油送回至压缩机内，气态制冷剂进入制冷系统的管路中工作。下述的流体指的是制冷剂及润滑油的混合物，液态物质指的是润滑油与液态制冷剂的混合物，气态物质指的是气态制冷剂。
具体地，请参见图1，分离器100包括分离器本体101，分离器本体101包括壳体10及出气管20，壳体10中空设置以形成内腔11，出气管20一部分伸入内腔11中，另一部分伸出壳体10外。
壳体10包括第一筒体12及第二筒体13，第一筒体12的一端朝向第二筒体13的一端扩口设置，第二筒体13的一端插入第一筒体12内，第二筒体13与第一筒体12通过焊接固定。
第一筒体12远离第二筒体13的一端开设有连接口121，连接口121与内腔11连通，分离器本体101还包括进气管50，进气管50设于连接口121处。
进一步地，第二筒体13远离第一筒体12的一端开设有第一安装口131及第二安装口132，出气管20穿设于第一安装口131内，第二安装口132靠近第一安装口131设置。
优选地，出气管20呈U型，既能够缓解应力集中问题，又方便安装人员与其他管路连接。
出气管20包括第一直管21、第一弯管22及第二直管23，第一直管21、第一弯管22及第二直管23依次连接并形成U型，第一直管21的一端伸入内腔11中，另一端伸出内腔11外与第一弯管22连接。第一直管21的轴线与壳体10的轴线重合。
分离器本体101还包括过滤机构30，过滤机构30设于内腔11中，起到过滤杂质、分离液态物质及气态物质的作用。
过滤机构30包括第一过滤组件31及第二过滤组件32，第一过滤组件31及第二过滤组件32均设于壳体10内，并相互间隔设置。
第一过滤组件31包括第一支架311及第一过滤网312，第一过滤网312呈半圆形并固定于第一支架311上；第二过滤组件32包括第二支架321及第二过滤网322，第二过滤网322呈半圆形并固定在第二支架321上。第一支架311及第二支架321均呈“冂”型。
第一支架311上设有第一固定结构313，第一固定结构313呈环形，第一过滤网312的边缘插入第一固定结构313下，从而固定在第一支架311上；第二支架321上设有第二 固定结构327，第二固定结构327呈环形，第二过滤网322的边缘设于第二固定结构327下，从而固定在第一支架311上。
请参见图3及图4，第一支架311及第二支架321均包括本体部3111及加厚部3112，或，第一支架311包括本体部3111及加厚部3112，或，第二支架321包括本体部3111及加厚部3112，本体部3111与加厚部3112直接或间接连接，加厚部3112的壁厚D 1大于本体部3111的壁厚D 2。如此设置，能够使第一支架311及/或第二支架321与壳体10的内壁紧装配合，在焊接时，无需人工手扶，加强安装效率，能够降低人力成本，并且能够卡紧下述的滤芯33，对于滤芯33起到固定作用。
请参见图3，在其中一个实施例中，第一支架311及或第二支架321包括侧边3113，侧边3113环绕本体部3111的周向设置，加厚部3112由侧边3113直接加厚形成。
请参见图4，在另外一个实施例中，第一支架311及或第二支架321包括侧边3113，侧边3113环绕本体部3111的周向设置，侧边3113的一端折边形成折边段3114，未折边的侧边3113与折边段3114叠加形成加厚部3112。折边段3114可与本体部3111抵接，也可间隔设置，只要能起到加厚作用即可，侧边3113可朝向壳体10的内壁方向折边形成折边段3114，也可朝向远离壳体10的内壁方向折边形成折边段3114。
加厚部3112呈环形并环绕本体部3111的周向设置，以加强过滤机构30与壳体10内壁抵接的稳定性及可靠性。
请参见图5及图6，第一支架311的本体部3111上开设有多个第一通孔315，多个第一通孔315与内腔11连通，第一支架311的本体部3111上远离第二支架321的侧面设有第一挡部316，多个第一通孔315环绕第一挡部316的周向设置，第一挡部316对于流体具有阻挡作用，能够帮助流体中的液态物质与气态物质分离，并对于液态物质起到导流作用，使得液态物质流入第一通孔315内。
优选地，第一挡部316朝向第一过滤网312的侧面为球面，球面对于流体起到更好的导流作用，能够减少流体流动时的压力损失。
请参见图7至图9，第二支架321的本体部3111上开设有多个第二通孔323，第二通孔323与内腔11连通，第二支架321的本体部3111靠近第一支架311的侧面设有第二挡部325，第二挡部325设于第二通孔323的孔口处，第二挡部325的一端连接第二支架321的本体部3111，另一端朝向远离第一支架311的方向延伸，以部分遮挡第二通孔323。第二挡部325能够改变流体的流动方向，并进一步降低流体流速，且使得流体中的气态物质与液态物质分离，并对于流体起到导流作用。
进一步地，第二挡部325具有第一端3251及第二端3252，第一端3251与第二支架 321连接，第二端3252朝向远离第一支架311的方向延伸。并且，第一端3251的端面的中心点与壳体10的轴线之间的距离L 1小于或等于第二端3252的端面的中心点与壳体10的轴线之间的距离L 2，即，第一端3251的端面的中心点与第一直管21的轴线之间的距离L 1小于第二端3252端面的中心点与第一直管21之间的距离L 2，以使液态物质在流出第二通孔323时，其流动方向偏离出气管20，从而防止液态物质进入出气管20内。
第二支架321的本体部3111远离第一支架311的侧面设有第三挡部326，第三挡部326设于第二通孔323的孔口处，第三挡部326的一端连接第二支架321的本体部3111，另一端朝向靠近第一支架311的方向延伸，以部分遮挡第二通孔323。第三挡部326同样能够降低流体流速，使得流体中的气态物质与液态物质分离。
第三挡部326具有第三端3261及第四端3262，第三端3261与第二支架321连接，第四端3262朝向靠近第一支架311的方向延伸，并且，第四端3262端面的中心点与壳体10的轴线之间的距离L 4小于或等于第三端3261端面的中心点与壳体10的轴线之间的距离L 3，即，第四端3262端面的中心点与第一直管21的轴线之间的距离L 4小于第三端3261端面的中心点与第一直管21之间的距离L 3，以使液态物质在流入第二通孔323时，其流动方向偏离出气管20。需要解释的是，在本申请中，距离L 1、L 2、L 3及L 4为垂直距离，作为举例，第一端3251端面的中心点到壳体10的轴线的距离为第一端3251端面的中心点与壳体10的轴线连接形成的垂线的长度，第二端3252、第三端3261、第四端3262亦如此。
第二挡部325呈弧形，弧形的第二挡部325具有内凹面3253及外凸面3254，第二挡部325的内凹面3253朝向第一支架311设置，第二挡部325的外凸面3254远离第一支架311，也就是说，弧形的第二挡部325朝向第一支架311的侧面相对第二支架321凹陷，弧形的第二挡部325远离第一支架311的侧面相对第二支架321凸出；第三挡部326呈弧形，弧形的第三挡部326具有内凹面3253及外凸面3254，第三挡部326的内凹面3253与第二挡部325的内凹面3253相对设置，第三挡部326的外凸面3254朝向第一支架311，也就是说，弧形的第三挡部326远离第一支架311侧面相对第二支架321凹陷，弧形的第三挡部326朝向第一支架311的侧面相对第二支架321凸出。弧形的第三挡部326的外凸面3254能够减少液态物质的流动阻力，弧形的第二挡部325的内凹面3253能够聚集小颗粒油滴，提高油分离效果。
优选地，在本实施例中，第二通孔323为四个，四个第二通孔323沿着第二支架321的周向均匀地分布，且第二挡部325及第三挡部326均呈1/4球形，如此设置，第三挡部326能够更好地挡流，使流体中的气态物质与液态物质分离，第二挡部325能够更好地聚 集颗粒油滴，同时，第二挡部325与第三挡部326不至于过于遮挡第二通孔323，而减少第二通孔323的流通面积，从而影响流体流动。
过滤机构30还包括滤芯33，滤芯33设于第一过滤组件31与第二过滤组件32之间，具体地，滤芯33位于第一支架311、第二过滤网322及第二支架321之间，第二过滤网322对于滤芯33起到支撑作用，同时，加厚部3112能够夹紧滤芯33，对于滤芯33起到固定支撑作用。
滤芯33为不锈钢丝SUS滤芯，不锈钢丝不仅具有耐磨蚀性，而且硬度较强，能够降低液态物质的流速，能够有效地实现气液分离。
请参见图2，第一支架311的本体部3111上朝向第二支架321的侧面开设有凹槽317，凹槽317与第一挡部316相适配，即，凹槽317位于第一挡部316的内侧，滤芯33与凹槽317的槽壁部分接触，以使滤芯33与凹槽317的槽壁之间形成腔体318，也就是说，滤芯33部分挤入凹槽317内而不完全填充凹槽317，以使腔体318内留有气体，形成一定的压力，能够帮助液态物质下沉。
在安装过程中，将过滤机构30设于内腔11中，第一支架311及/或第二支架321上的加厚部3112卡住壳体10的内壁固定，再卡紧滤芯33，再进行焊接，无需人工支撑，能够降低人力成本，提高安装效率。
在过滤过程中，流体从进气管50进入，经过第一过滤网312过滤掉部分杂质，再经过第一挡部316的阻挡，流体的流动方向改变，流速降低，部分流体中的气态物质和液态物质分离，达到初步分离效果；流体从第一通孔315进入滤芯33，由于滤芯33的阻挡，流体的流速进一步下降，气态物质上浮，实现液态物质与气态物质的二次分离；分离出来的液态物质与还未分离的流体进入第二过滤组件32中，由于第三挡部326的阻挡，流速进一步降低，实现第三次分离，分离出来的液态物质一部分聚集在第二挡部325的内侧，另一部分流出，存入分离器本体101的底部，润滑油进入回油管30回至压缩机200。
请参见图10及图12，分离器100还包括回油管40，回油管40的一端连接于第二安装口132，另一端连接于压缩机200，以将存储在分离器本体101的底部的润滑油导流回至压缩机200内。
具体地，回油管40包括连接管41及主体管42，连接管41与主体管42相互连接，连接管41连接于第二安装口132处，主体管42呈U型。可以理解，U型的主体管42的底部的弧度较大，当分离器100在振动的环境中运行时，能够分散应力，缓解应力集中问题，从而增加分离器100的使用寿命。
进一步地，连接管41的轴线相对于壳体10的轴线倾斜设置，也就是说，第二安装口 132的轴线相对于第一安装口131的轴线倾斜设置，第二安装口132的开口远离第一安装口131的开口，在进行安装时，能够增加位于壳体10外部的出气管20与回油管40之间的距离，以方便现场安装，若回油管40与出气管20距离太近，在安装时，焊枪容易受到干扰，造成焊接盲点。
优选地，请参见图1，连接管41的轴线与壳体10的轴线之间的夹角α为56°至64°之间。可以理解，如此设置，能够使回油管40与出气管20保持一定的距离，又能够使润滑油能够顺利回落。若连接管41的轴线与壳体10的轴线之间的夹角α过大，会增加润滑油的流动阻力，从而导致润滑油积在连接管41内。连接管41的轴线与壳体10的轴线之间的夹角α可为56°、58°、60°、64°或56°至64°之间的任意数值。
请参见图11，连接管41的外侧壁上设有定位凸起411，定位凸起411设于内腔11中，定位凸起411用于对连接管41进行定位，定位凸起411抵接于第二安装口132的孔口处。在安装人员将连接管41插入壳体10内时，定位凸起411起到定位作用，以使安装人员知道该插入多少深度。
定位凸起411为多个，多个定位凸起411沿着连接管41的周向均匀分布，以增加定位的可靠性。在本实施例中，定位凸起411为两个，两个定位凸起411相对设置，在其他实施例中，定位凸起411可为一个或三个及以上，本申请并不对定位凸起411的个数加以限定，只要能对连接管41进行定位即可。
具体地，连接管41伸入内腔11中的深度L 5大于或等于壳体10的壁厚的两倍，也就是说，定位凸起411与壳体10的内壁抵接的一侧到连接管41位于壳体10内的一端的端面之间的距离L 5等于壳体10壁厚的两倍。如此设置，能够保证位于分离器100底部的杂质不进入连接管41。可以理解的是，制冷剂中混合有杂质及润滑油，经过分离器100的分离，由于密度不同，杂质会沉积在分离器100的底部，润滑油覆盖在杂质上面，将连接管41伸入内腔11的深度L 5设置为壳体10壁厚的两倍，能够避免杂质进入连接管41而进入压缩机200，从而防止压缩机200卡死。
主体管42包括第三直管421、出口管423及第二弯管422，第三直管421的一端与连接管41连接，另一端与第二弯管422连接，第二弯管422远离第三直管421的一端与出口管423连接，第三直管421、第二弯管422及出口管423依次连接形成U型。
优选地，在本申请中，U型的主体管42的底部没有直管段，也就是说，第一弯管22及第二弯管422均为弯管，不包含直管段，即，主体管42呈“U”型，而非呈“凵”型，U型的底部长度较短，即，第一弯管22及第二弯管422的长度较短，受振动影响较小。当然，在其他实施例中，根据不同的设计，主体管42的底部还可包含直管段。
请继续参见图1，出口管423的轴线相对壳体10的轴线倾斜的角度小于或等于5°，也就是说，当分离器100竖直安装时，出口管423管口的端面与壳体10的轴线的夹角β的范围为85°到95°之间，出口管423的轴线与壳体10的轴线近似平行，在与压缩机200连接时，出口管423能够对准压缩机200安装，方便安装人员焊接安装。可以理解，若出口管423的轴线相对壳体10倾斜角度过大，无法与压缩机200对接安装，则安装人员需要掰正回油管40，会导致回油管40变形。出口管423的轴线相对与壳体10的轴线倾斜的角度可为1°、3°、5°或0°到5°之间的任意数值，其出口管423的管口可朝向远离壳体10轴线的方向倾斜，也可远离壳体10的轴线方向倾斜。
优选地，出口管423的轴线与壳体10的轴线平行设置，进一步方便安装人员与压缩机200对接连接。
出口管423远离第二弯管422的一端扩口设置，即，出口管423扩口处的内径大于主体管42其他部位的内径，以方便安装人员直接让压缩机200的安装管插入。
回油管40一体成型设置，以减少焊接工艺。
请参见图13，本申请还提供一种制冷系统1000，该制冷系统1000包括上述的分离器100。
在工作过程中，制冷剂自进气管50带着润滑油和杂质一起进入内腔11中，在下落的过程中，制冷剂与润滑油及杂质慢慢分离，经过过滤网30过滤，一部分杂质被过滤掉，另一部分杂质进入分离器100的底部，润滑油存入分离器100的底部，再经过回油管40流回至压缩机200内。若制冷剂为气液混合的状态，在制冷剂下落的过程中，液态制冷剂与气态制冷剂也慢慢分离，气态制冷剂进入出气管20流出进入制冷系统1000工作。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (20)

  1. 一种回油管，连接于分离器本体，所述分离器本体包括壳体及连接于所述壳体的出气管；
    其特征在于，所述回油管包括相互连接的连接管及主体管，所述连接管的一端伸入所述壳体内，另一端与所述主体管连接，所述主体管呈U型。
  2. 根据权利要求1所述的回油管，其中，所述连接管的轴线相对所述壳体的轴线倾斜设置。
  3. 根据权利要求1所述的回油管，其中，所述连接管的轴线与所述壳体的轴线之间的夹角的范围为56°至64°。
  4. 根据权利要求1所述的回油管，其中，所述连接管的外侧壁上设有定位凸起，所述定位凸起位于所述壳体内并抵接于所述壳体。
  5. 根据权利要求4所述的回油管，其中，所述定位凸起为多个，多个所述定位凸起沿着所述连接管的周向均匀分布。
  6. 根据权利要求1所述的回油管，其中，所述连接管插入所述壳体内的深度大于或等于所述壳体壁厚的两倍。
  7. 根据权利要求1所述的回油管，其中，所述主体管包括出口管，所述出口管的轴线相对所述壳体的轴线倾斜角度小于或等于5°。
  8. 根据权利要求1所述的回油管，其中，所述主体管包括出口管，所述出口管的轴线与所述壳体的轴线平行设置。
  9. 一种分离器，其特征在于，包括分离器本体及如权利要求1-8任意一项所述的回油管，所述回油管连接于所述分离器本体。
  10. 根据权利要求9所述的分离器，其中，所述分离器本体包括壳体、第一过滤组件及第二过滤组件，所述第一过滤组件及第二过滤组件设于所述壳体内，所述第一过滤组件包括第一支架，所述第二过滤组件包括第二支架，所述第一支架与所述第二支架间隔设置；
    所述第一支架及/或所述第二支架包括相互连接的本体部和加厚部，所述加厚部的壁厚大于本体部的壁厚。
  11. 根据权利要求10所述的分离器，其中，所述加厚部呈环形并环绕所述本体部的周向分布。
  12. 根据权利要求10所述的分离器，其中，所述第一支架及/或所述第二支架包括与所述本体部连接的侧边，所述侧边折边以形成所述加厚部。
  13. 根据权利要求10所述的分离器，其中，所述第一支架包括相互连接的本体部及加 厚部，所述第一支架的本体部靠近所述第二支架的侧面开设有凹槽，所述分离器还包括滤芯，所述滤芯设于所述第一过滤组件与所述第二过滤组件之间，所述滤芯与所述凹槽槽壁的部分接触。
  14. 根据权利要求13所述的分离器，其中，所述滤芯为不锈钢丝滤芯。
  15. 根据权利要求13所述的分离器，其中，所述第一支架的本体部远离所述第二支架的侧面设有第一挡部，所述第一挡部与所述凹槽相适配，所述第一支架的本体部上开设有多个第一通孔，多个所述第一通孔环绕所述第一挡部设置。
  16. 根据权利要求10所述的分离器，其中，所述第二支架包括相互连接的本体部及加厚部，所述第二支架的本体部上开设有多个第二通孔，所述第二支架的本体部远离所述第一支架的侧面设有第二挡部，所述第二挡部设于所述第二通孔的孔口处，所述第二挡部的一端与所述第二支架的本体部连接，另一端朝着远离所述第一支架的方向延伸。
  17. 根据权利要求16所述的分离器，其中，所述第二支架的本体部靠近所述第一支架的侧面设有第三挡部，所述第三挡部设于所述第二通孔孔口处，所述第三挡部的一端与所述第二支架的本体部连接，另一端朝着靠近所述第一支架的方向延伸。
  18. 根据权利要求17所述的分离器，其中，所述第二挡部及所述第三挡部均呈弧形，所述第二挡部的内凹面与所述第三挡部的内凹面相对设置，所述第二挡部的外凸面远离所述第一支架，所述第三挡部的外凸面朝向所述第一支架。
  19. 根据权利要求17所述的分离器，其中，所述第二挡部具有第一端及第二端，所述第一端与所述第二支架连接，所述第二端朝向远离所述第一支架的方向延伸，所述第一端的端面的中心点与所述壳体的轴线之间的距离小于或等于所述第二端的端面的中心点与所述壳体的轴线之间的距离；所述第三挡部具有第三端及第四端，所述第三端与所述第二支架连接，所述第四端朝向靠近所述第一支架的方向延伸，并且，所述第四端端面的中心点与所述壳体的轴线之间的距离小于或等于所述第三端端面的中心点与所述壳体的轴线之间的距离。
  20. 一种制冷系统，其特征在于，包括如权利要求9-19任意一项所述的分离器。
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