WO2018090663A1 - 一种油分离器及空调机组 - Google Patents

一种油分离器及空调机组 Download PDF

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Publication number
WO2018090663A1
WO2018090663A1 PCT/CN2017/094670 CN2017094670W WO2018090663A1 WO 2018090663 A1 WO2018090663 A1 WO 2018090663A1 CN 2017094670 W CN2017094670 W CN 2017094670W WO 2018090663 A1 WO2018090663 A1 WO 2018090663A1
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WIPO (PCT)
Prior art keywords
oil
screen assembly
oil separator
assembly
housing
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PCT/CN2017/094670
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English (en)
French (fr)
Inventor
雷连冬
张治平
钟瑞兴
刘建飞
蒋彩云
周义
蒋楠
陈玉辉
刘增岳
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珠海格力电器股份有限公司
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Publication of WO2018090663A1 publication Critical patent/WO2018090663A1/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
    • 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
    • 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
    • F25B43/003—Filters

Definitions

  • the invention relates to the technical field of air conditioners, in particular to an oil separator and an air conditioning unit.
  • the oil separator can be divided into a built-in oil separator and an external oil separator.
  • the separation method can be divided into a deceleration collision separation, a centrifugal separation and a filtration separation, and the deceleration collision separation and the centrifugal separation are often used as the first stage. Separation mode, filtration separation is often used as a secondary separation method.
  • a two-stage oil separator commonly used in a centrifugal compressor is used. When working, a mixed gas carrying lubricating oil enters the oil separator from the air inlet 11, and the kinetic energy is reduced after the collision with the baffle 7, and some lubricating oil is removed.
  • the first stage separation After being blocked, the first stage separation is completed; the mixed gas after the deceleration enters the filter assembly 8, and the oil droplets gather and become larger under the action of the filter assembly 8, and fall under the action of gravity, and the gas continues to rise.
  • the secondary separation is completed and finally discharged from the gas outlet 12.
  • the above oil separator has the following disadvantages: when the amount of the mixed gas is large and the flow rate is small, the collision separation effect of the two baffles 7 is lowered. At this time, a large amount of the gas carrying the lubricating oil flows through the filter screen in the axial direction, and the oil droplets In the future, the gas will be dissipated by the back gas, and finally the lubricating oil will flow to the outside of the compressor with the gas, and the phenomenon of “running oil” will appear.
  • an object of the present invention is to provide an oil separator having a good lubricating oil separation effect
  • Another object of the present invention is to provide an air conditioning unit with good stability.
  • An oil separator includes a casing having an inner cavity, an air inlet, an air outlet and a oil return port are disposed on the casing, and the casing is provided with a spiral baffle and sleeved on the spiral guide a hollow first screen assembly in the flow plate and a second screen assembly blocking the upper end opening of the first screen assembly; an oil-mixed gas entering from the inlet port passes through the spiral baffle After being filtered, the stage is filtered by the first screen assembly, then passed through the second screen assembly in the axial direction for three-stage filtration, and then discharged from the gas outlet, and the oil droplets obtained by filtration are filtered from the oil. The mouth is out.
  • the second screen assembly is disposed inside the upper end of the first screen assembly; or the second screen assembly is disposed adjacent to the first screen assembly.
  • the second screen assembly is in the shape of a plate.
  • the inner side and the outer side of the first screen assembly are respectively provided with a support ring, and the support ring is respectively provided with a through hole and two ends of the support ring are respectively fixed to the housing.
  • the spiral baffle has a gap of width d1 between the support ring located outside the first screen assembly.
  • the upper side and the lower side of the second screen assembly are respectively provided with a hollow annular support plate, and the outer circumference of the support plate is fixedly connected to the support ring located inside the first screen assembly.
  • the oil return port is disposed at a center of the bottom plate of the housing; and/or the oil return port is disposed on a portion of the bottom plate of the housing below the first screen assembly.
  • the spiral baffle has a helix angle of ⁇ , a pitch of H 3 , and a total height of H 2 , and the height of the housing cavity is H 1 ; wherein 20° ⁇ 60°, and/ Or H 3 ⁇ H 2 /5, and/or 0.85H 1 ⁇ H 2 ⁇ 0.95H 1 .
  • the thickness of the first screen assembly is greater than or equal to 40 mm; and/or the thickness of the second screen assembly is greater than or equal to 40 mm.
  • the air outlet is disposed on the top plate of the casing, and at least the bottom of the inner wall surface of the air outlet is a slope inclined to the outside, and the upper end of the slope is rounded.
  • the invention employs the following technical solutions:
  • An air conditioning unit comprising a compressor and any one of the oil separators described above, wherein lubricating oil flowing from the oil return port of the oil separator is supplied to the compressor.
  • the oil separator of the invention has a three-stage separation structure, can effectively separate the lubricating oil from the refrigerant gas, avoids the problems of inhalation and liquidation caused by running oil, low cooling effect, and the like, and improves the reliability of the air conditioning unit.
  • the oil separator can guide the transition of the refrigerant gas from the inside of the compressor to the outside, and can also guide the separated liquefied lubricating oil to return to the oil tank, and the air conditioning unit has high reliability.
  • Figure 1 is a schematic view showing the structure of a prior art oil separator
  • FIG. 2 is a schematic perspective view showing the structure of an oil separation structure according to a preferred embodiment of the present invention.
  • Figure 3 is a cross-sectional view showing an oil separating structure provided by a preferred embodiment of the present invention.
  • Figure 4 is a schematic view showing the operation of the oil separation structure provided in a preferred embodiment of the present invention.
  • the oil separator of the preferred embodiment is a vertical oil separator, which comprises a casing 1 having a cavity, and the casing 1 is provided with an air inlet 11, an air outlet 12 and a return port.
  • the housing 1 is provided with a spiral baffle 2, a hollow first filter assembly 3 sleeved in the spiral baffle 2 and a second filter assembly 4 that blocks the upper end of the first filter assembly 3;
  • the oil-mixed gas entering from the intake port 11 is filtered by the first spiral screen baffle 2, filtered by the first screen assembly 3, and then passed through the second screen assembly 4 in the axial direction for tertiary filtration.
  • the housing 1 is preferably, but not limited to, a cylindrical hollow structure, and the side wall of the housing 1 may be formed by a sheet metal reel; the top plate of the housing 1 may be, but not limited to, a flange that is fixed to the side wall of the housing 1.
  • the bottom plate of the housing 1 can be, but is not limited to, a solid plate.
  • the oil separator of the embodiment has a three-stage separation structure, can effectively separate the lubricating oil from the refrigerant gas, avoids problems such as suction and liquid, low cooling effect caused by running oil, and improves the reliability of the unit.
  • the second screen assembly 4 blocks the opening of the first screen assembly 3 and performs three-stage filtration on the mixed gas.
  • the second screen assembly 4 is preferably placed inside the upper end of the first screen assembly 3 to make the axial footprint more Small, the overall structure is more compact. It should be noted that the arrangement of the second screen assembly 4 is not limited to the above.
  • the second screen assembly 4 may also be disposed adjacent to the first screen assembly 3.
  • the first screen assembly 3 and the second screen assembly 4 are woven by crossing the wires at an angle to each other.
  • the overall shape and structure of the second screen assembly 4 is not particularly limited, and the mixed gas filtered by the first screen assembly 3 can be further filtered and separated in the axial direction through the second screen assembly 4.
  • the second screen assembly 4 is in the form of a plate.
  • the plate shape may be a flat plate shape, a folded plate shape, a wave plate shape or any other irregular plate shape.
  • the plate-shaped filter screen preferably has a flat shape in consideration of factors such as ease of processing and low production cost, and the plate-shaped filter screen preferably has a folded plate shape, a wave plate shape, or the like in consideration of a factor of better filtration effect.
  • the number of the screens in the first screen assembly 3 and the second screen unit 4 is not limited, and may be set according to specific needs.
  • the thickness of the plurality of filter screens may be the same or different, but the filtration efficiency is positively correlated with the thickness of the filter mesh, and the structure size and the filtering effect are comprehensively considered.
  • the thickness of the first screen assembly 3 is 40 mm or more, and/or the thickness of the second screen assembly 4 is 40 mm or more.
  • the mounting manner of the first screen assembly 3 is not particularly limited, but preferably, the inner side and the outer side of the first screen assembly 3 are respectively provided with support rings 6 respectively provided with through holes for the passage of the mixed gas and The two ends of the support ring 6 are respectively fixedly connected to the housing 1 . Specifically, the upper ends of the two support rings 6 are respectively fixed to the top cover of the housing 1 and the lower ends are respectively fixed to the bottom plate of the housing 1 to fix the first. Filter assembly 3. Preferably, but not limited to, a welded connection between the support ring 6 and the housing 1.
  • the two support rings 6 are respectively provided with through holes for the mixed gas to pass through.
  • the shape, size and arrangement of the through holes on the two support rings 6 may be the same or different, and the mixed gas may pass and the filtering effect may be improved.
  • the two support rings 6 are respectively provided with a diameter of Circular hole-shaped through hole. More preferably,
  • the mounting manner of the second screen assembly 4 is not particularly limited, but preferably, the upper side and the lower side of the second screen assembly 4 are respectively provided with hollow annular support plates, and the outer circumference of the support plate and the first screen assembly 3 are located.
  • the inner support ring 6 is fixed.
  • the support plate is connected to the support ring 6 located inside the first screen frame 3 by welding.
  • the spiral baffle 2 forcibly raises the gas and performs primary filtration on the mixed gas.
  • the helix angle of the spiral baffle 2 is ⁇
  • the pitch is H 3
  • the total height is H 2
  • the height of the inner cavity of the casing 1 is H 1 ; in order to make the gas have sufficient spiral rising stroke, the first-stage separation filtering effect is ensured. 20° ⁇ 60°, and/or H 3 ⁇ H 2 /5, and/or 0.85H 1 ⁇ H 2 ⁇ 0.95H 1 .
  • the spiral baffle 2 is fixedly attached to the inner wall of the casing 1.
  • the manner of connection with the casing 1 is not particularly limited, but preferably, the spiral baffle 2 is welded to the inner wall of the casing 1 to be fixed by the casing 1. support.
  • the spiral baffle 2 has a gap of width d1 between the support ring 6 located outside the first screen assembly 3.
  • d1 width between the support ring 6 located outside the first screen assembly 3.
  • the oil return port 13 is disposed at the center of the bottom plate of the casing 1; and/or the oil return port 13 is disposed on a portion of the bottom plate of the casing 1 located below the first screen mesh assembly. .
  • the air outlet 12 is provided on the top plate of the casing 1.
  • at least the bottom of the inner wall surface of the oil return port 13 is a slope inclined to the outside, and the upper end of the slope is rounded.
  • the mixed gas enters the spiral baffle 2 through the air inlet 11 and spirally rises for one-stage separation. Under the action of centrifugal force, part of the lubricating oil gas is mixed with the gas. Separating and gathering liquid oil droplets, the oil droplets flow under the force of gravity along the upper surface of the blade of the spiral baffle 2 or the gap between the spiral baffle 2 and the support ring 6, thereby completing one Stage separation
  • the lubricating oil gas that is not separated under the centrifugal force flows through the first screen assembly 3 for secondary separation.
  • the oil droplets gather and become larger, and then from the mixed gas. Separated and flowed to the oil return port 13 under the action of gravity, thus completing the secondary separation;
  • the remaining mixed gas carrying a small amount of lubricating oil flows to the second screen assembly 4 for three-stage separation, and the mixed gas carrying a small amount of lubricating oil enters the three-stage separation path with two paths: first, radial from the first screen assembly 3 Flowing into the second screen assembly 4, second, from the first screen assembly 3 radially into the interior of the housing 1, and then axially to the second screen assembly 4; from which path can not enter, the mixed gas flows through
  • the second filter assembly 4 is similar to the secondary separation. Under the action of the wire of the second filter assembly 4, a small amount of lubricating oil is separated and flows to the oil return port 13 under the action of gravity, and the separated The refrigerant gas flows to the gas outlet 12, and the three-stage separation is completed.
  • the preferred embodiment provides an oil separator having a structure substantially the same as that of the preferred embodiment 1, except that the oil separator of the preferred embodiment is a horizontal oil separator; the oil return port 13 of the oil separator It is disposed on the side wall of the casing 1, and the number and position of the oil return ports 13 can be set according to specific conditions.
  • the intake port 11 in the preferred embodiment is preferably disposed on the side wall of the housing 1.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the preferred embodiment provides an air conditioning unit including a compressor and an oil separator according to any one or both of the preferred embodiments, the lubricating oil supply flowing from the oil return port 13 of the oil separator The compressor.
  • the air conditioning unit provided in this embodiment adopts the above oil separator, and the oil separator can guide the transition of the refrigerant gas from the inside of the compressor to the outside, and can also guide the separated liquefied lubricating oil back to the oil.
  • the air conditioning unit has high reliability.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
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  • General Engineering & Computer Science (AREA)
  • Separating Particles In Gases By Inertia (AREA)
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Abstract

一种油分离器及空调机组，油分离器包括具有内腔的壳体（1），壳体（1）上具有进气口（11）、出气口（12）和回油口（13），壳体（1）内设置螺旋导流板（2）、套设于螺旋导流板（2）内的中空第一滤网组件（3）和封堵于其上端开口的第二滤网组件（4），进入的油气混合物经螺旋导流板（2）一级过滤后被第一滤网组件（3）二级过滤，然后沿轴向穿过第二滤网组件（4）进行三级过滤后从出气口（12）排出，过滤得到的油滴从回油口（13）流出。该油分离器具有三级分离结构，能避免跑油导致的吸气带液、制冷效果低等问题。

Description

一种油分离器及空调机组 技术领域
本发明涉及空调技术领域，尤其涉及一种油分离器及空调机组。
背景技术
离心压缩机工作时，机械运动(如油泵搅液、转子运动、齿轮啮合运动等)和气封的高压气体不断提升压缩机内部气体压力，需通过连接管等结构连通压缩机内部和外部，以平衡内部气压。但内部冷媒气体通过连接管时，会携带气态润滑油，如不将之分离，润滑油会流到压缩机外部，即出现“跑油”现象。“跑油”现象一方面导致机组吸气带液，损害叶轮寿命；另一方面，降低润滑油液位，使轴承等零件得不到充分润滑、加剧磨损。因此，常在连接管前加一个油分离部件以隔离气态润滑油。
油分离器可分为内置油分离器和外置油分离器，分离方式可分为降速式碰撞分离、离心式分离以及过滤分离等，而降速式碰撞分离、离心式分离常作为一级分离方式，过滤分离常作为二级分离方式。如图1所示，现有离心压缩机常用的双级油分离器，工作时，携带润滑油的混合气体从进气口11进入油分离器，与挡板7碰撞后动能降低，部分润滑油被阻挡，至此完成一级分离；降速后的混合气体进入滤网组件8，油滴在滤网组件8的扑集作用下聚集变大，并在重力作用下下降，而气体则继续上升，完成二级分离并最终从出气口12排出。
但是上述油分离器存在以下缺点：当混合气体量较多、流速较小时，两个挡板7的碰撞分离效果降低，此时，大量携带润滑油的气体沿轴向流经滤网，油滴未来得及聚集就被后面气体冲散，最终润滑油随气体流向压缩机外部，出现“跑油”现象。
发明内容
有鉴于上述问题，本发明的一个目的在于提出一种润滑油分离效果好的油分离器；
本发明的另一个目的在于提出一种稳定性好的空调机组。
为达此目的，一方面本发明采用以下技术方案：
一种油分离器，包括具有内腔的壳体，所述壳体上设置有进气口、出气口和回油口，所述壳体内设置有螺旋导流板、套设于所述螺旋导流板内的中空第一滤网组件和封堵所述第一滤网组件上端开口的第二滤网组件；从所述进气口进入的带油的混合气体经所述螺旋导流板一级滤后被所述第一滤网组件二级过滤，然后沿轴向穿过所述第二滤网组件进行三级过滤后从所述出气口排出，过滤得到的油滴从所述回油口流出。
进一步地，所述第二滤网组件置于所述第一滤网组件上端内侧；或，所述第二滤网组件邻设于所述第一滤网组件上方。
进一步地，所述第二滤网组件呈板状。
进一步地，所述第一滤网组件的内侧和外侧分别设置有支撑圈，二所述支撑圈上分别设置有通孔且二所述支撑圈的两端分别与所述壳体固连。
进一步地，所述螺旋导流板与位于所述第一滤网组件外侧的所述支撑圈之间具有宽度为d1的间隙。
进一步地，所述第二滤网组件的上侧和下侧分别设置有中空环状支撑板，所述支撑板的外周与位于所述第一滤网组件内侧的所述支撑圈固连。
进一步地，所述回油口设置于所述壳体的底板的中心；和/或，所述回油口设置于所述壳体底板的位于所述第一滤网组件下方的部分上。
进一步地，所述螺旋导流板的螺旋升角为α、螺距为H3、总高为H2，所述壳体内腔的高度为H1；其中，20°≦α≦60°，和/或H3≦H2/5,和/或0.85H1≦H2≦0.95H1。
进一步地，所述第一滤网组件的厚度大于等于40mm；和/或，所述第二滤网组件的厚度大于等于40mm。
进一步地，所述出气口设置于所述壳体的顶板上，所述出气口的内壁面的至少底部为向外侧倾斜的斜面，所述斜面的上端倒圆角。
另一方面，本发明采用以下技术方案：
一种空调机组，包括压缩机和上述任一所述油分离器，从所述油分离器的所述回油口流出的润滑油供向所述压缩机。
本发明的有益效果如下：
本发明油分离器具有三级分离结构，能有效地从冷媒气体中分离出润滑油，避免了因跑油导致的吸气带液、制冷效果低等问题，提高了空调机组可靠性。
本发明空调机组由于采用上述油分离器，油分离器可以引导冷媒气体从压缩机内部过渡到外部的同时，还能引导分离后液化的润滑油回到油箱，空调机组可靠性高。
附图说明
图1是现有技术油分离器的结构示意图；
图2是本发明优选实施例一提供的油分离结构的立体结构示意图；
图3是本发明优选实施例一提供的油分离结构的剖视图；
图4是本发明优选实施例一提供的油分离结构的工作原理图。
图中：
1、壳体；2、螺旋导流板；3、第一滤网组件；4、第二滤网组件；5、支撑圈；6、支撑板；7、挡板；8、滤网组件；11、进气口；12、出气口；13、回油口。
具体实施方式
下面结合附图并通过具体实施方式来进一步说明本发明的技术方案。
优选实施例一：
本优选实施例提供了一种油分离器，其主要但不局限应用于空调机组。请参阅图2和图3，本优选实施例油分离器为立式油分离器，其包括具有内腔的壳体1，壳体1上设置有进气口11、出气口12和回油口13，壳体1内设置有螺旋导流板2、套设于螺旋导流板2内的中空第一滤网组件3和封堵第一滤网组件3上端开口的第二滤网组件4；从进气口11进入的带油的混合气体经螺旋导流板2一级过滤后被第一滤网组件3二级过滤，然后沿轴向穿过第二滤网组件4进行三级过滤后从出气口12排出，过滤得到的油滴从回油口13流出。壳体1优选但不局限为圆柱状空心结构，壳体1的侧壁可以由钣金平板卷轴而成；壳体1的顶板可以但不局限为与壳体1侧壁固连的法兰，以便于与外部组件连接；壳体1的底板可以但不局限为实心板。
本实施例的油分离器具有三级分离结构，能有效地从冷媒气体中分离出润滑油，避免了因跑油导致的吸气带液、制冷效果低等问题，提高了机组可靠性。
第二滤网组件4封堵第一滤网组件3开口，对混合气体进行三级过滤。第二滤网组件4优选为置于第一滤网组件3上端内侧，以使得轴向占用空间更 小、整体结构更紧凑。需要指出地，第二滤网组件4的设置方式并不局限于上述情况，例如，第二滤网组件4也可以邻设于第一滤网组件3上方。
第一滤网组件3、第二滤网组件4由金属丝以一定角度彼此交叉编织而成。第二滤网组件4的整体形状结构没有具体限制，可使经第一滤网组件3过滤的混合气体沿轴向穿过第二滤网组件4进行进一步过滤分离即可。但优选地，第二滤网组件4呈板状。板状可以为平板状、折板状、波浪板状或其他任意不规则板状。考虑到便于加工、制作成本低等因素，板状滤网优选为呈平板状；考虑到过滤效果更好的因素，板状滤网优选为呈折板状、波浪板状等。
第一滤网组件3、第二滤网组件4中滤网的数量没有限制，可以根据具体需要进行设置。第一滤网组件3、第二滤网组件4包括多块滤网时，多块滤网的厚度可以相同也可以不同，但过滤效率与过滤网厚度成正相关，综合考虑结构大小与过滤效果，第一滤网组件3的厚度大于等于40mm，和/或第二滤网组件4的厚度大于等于40mm。
第一滤网组件3的安装方式没有具体限制，但优选地，第一滤网组件3的内侧和外侧分别设置有支撑圈6，二支撑圈6上分别设置有通孔以供混合气体通过且二支撑圈6的两端分别与壳体1固连，具体地，二支撑圈6的上端分别与壳体1的顶盖固连、下端分别与壳体1的底板固连，以固定第一滤网组件3。支撑圈6与壳体1之间优选但不局限为焊接连接。
二支撑圈6上分别设置有供混合气体通过的通孔，二支撑圈6上通孔的形状、尺寸及排布可以相同也可以不同，可以使得混合气体通过、提高过滤效果即可。优选地，二支撑圈6上分别均布有直径为
Figure PCTCN2017094670-appb-000001
的圆孔状通孔。更优选地，
Figure PCTCN2017094670-appb-000002
第二滤网组件4的安装方式没有具体限制，但优选地，第二滤网组件4的上侧和下侧分别设置有中空环状支撑板，支撑板的外周与位于第一滤网组件3内侧的支撑圈6固连。优选地，支撑板与位于第一滤网组件3内侧的支撑圈6之间通过焊接连接。
螺旋导流板2使气体强制螺旋上升，对混合气体进行一级过滤。螺旋导流板2的螺旋升角为α、螺距为H3、总高为H2，壳体1内腔的高度为H1；为了使气体有足够的螺旋上升行程，保证一级分离过滤效果，20°≦α≦60°，和/或H3≦H2/5,和/或0.85H1≦H2≦0.95H1。
螺旋导流板2固连于壳体1的内壁上，其与壳体1的连接方式没有具体限制，但优选地，螺旋导流板2焊接于壳体1内壁，以被壳体1固定、支撑。
进一步地，为了让油滴在一级过滤时能通畅流下，螺旋导流板2与位于第一滤网组件3外侧的支撑圈6之间具有宽度为d1的间隙。优选地，2mm≦d1≦5mm。
为了便于油分离器内部液体润滑油外流，回油口13设置于壳体1的底板的中心；和/或，回油口13设置于壳体1底板的位于第一滤网组件下方的部分上。
出气口12设置于壳体1的顶板上，为了减少出气口12的气体压降，回油口13的内壁面的至少底部为向外侧倾斜的斜面，斜面的上端倒圆角。
下面结合图4介绍本实施例油分离器工作原理：工作时，混合气体通过进气口11进入螺旋导流板2螺旋上升，进行一级分离，在离心力作用下，部分润滑油气体从混合气体中分离并聚集成液态油滴，油滴在重力作用下沿着螺旋导流板2的叶片上表面或螺旋导流板2与支撑圈6之间的间隙流下，至此完成一 级分离；
在离心力下未分离的润滑油气体则流经第一滤网组件3进行二级分离，在第一滤网组件3的金属丝的扑集作用下，油滴集聚变大，进而从混合气体中分离出来，在重力作用下流动至回油口13，至此完成二级分离；
剩余携带少量润滑油的混合气体则流向第二滤网组件4进行三级分离，携带少量润滑油的混合气体进入三级分离的路径有两个：第一、从第一滤网组件3径向流入第二滤网组件4，第二、从第一滤网组件3径向进入壳体1内腔，再轴向流向第二滤网组件4；无法从哪个路径进入，混合气体都流经第二滤网组件4，与二级分离同理，在第二滤网组件4金属丝的扑集作用下，少量润滑油分离出来，并在重力作用下流动至回油口13，而分离后的冷媒气体则流向出气口12，至此完成三级分离。
优选实施例二：
本优选实施例提供了一种油分离器，其结构与优选实施例一基本相同，不同之处在于，本优选实施例的油分离器为卧式油分离器；油分离器的回油口13设置于壳体1的侧壁上，回油口13的数量和位置可以根据具体情况进行设置。
为了便于进气，本优选实施例中进气口11优选为设置于壳体1的侧壁上。
实施例三：
本优选实施例提供了一种空调机组，其包括压缩机和如优选实施例一或二任一所述油分离器，从所述油分离器的所述回油口13流出的润滑油供向所述压缩机。
本实施例提供的空调机组由于采用上述油分离器，油分离器可以引导冷媒气体从压缩机内部过渡到外部的同时，还能引导分离后液化的润滑油回到油 箱，空调机组可靠性高。
以上结合具体实施例描述了本发明的技术原理。这些描述只是为了解释本发明的原理，而不能以任何方式解释为对本发明保护范围的限制。基于此处的解释，本领域的技术人员不需要付出创造性的劳动即可联想到本发明的其它具体实施方式，这些方式都将落入本发明的保护范围之内。

Claims (6)

  1. 一种油分离器，包括具有内腔的壳体(1)，所述壳体(1)上设置有进气口(11)、出气口(12)和回油口(13)，其特征在于，所述壳体(1)内设置有螺旋导流板(2)、套设于所述螺旋导流板(2)内的中空第一滤网组件(3)和封堵所述第一滤网组件(3)上端开口的第二滤网组件(4)；
    从所述进气口(11)进入的带油的混合气体经所述螺旋导流板(2)一级过滤后被所述第一滤网组件(3)二级过滤，然后沿轴向穿过所述第二滤网组件(4)进行三级过滤后从所述出气口(12)排出，过滤得到的油滴从所述回油口(13)流出。
  2. 根据权利要求1所述的油分离器，其特征在于，所述第二滤网组件(4)置于所述第一滤网组件(3)上端内侧；或，所述第二滤网组件(4)邻设于所述第一滤网组件(3)上方。
  3. 根据权利要求1所述的油分离器，其特征在于，所述第二滤网组件(4)呈板状。
  4. 根据权利要求1至3任一所述的油分离器，其特征在于，所述第一滤网组件(3)的内侧和外侧分别设置有支撑圈(5)，二所述支撑圈(5)上分别设置有通孔且二所述支撑圈(5)的两端分别与所述壳体(1)固连。
  5. 根据权利要求4所述的油分离器，其特征在于，所述螺旋导流板(2)与位于所述第一滤网组件(3)外侧的所述支撑圈(5)之间具有宽度为d1的间隙。
  6. 根据权利要求4所述的油分离器，其特征在于，所述第二滤网组件(4)的上侧和下侧分别设置有中空环状支撑板(6)，所述支撑板(6)的外周与位于所述第一滤网组件(3)内侧的所述支撑圈(5)固连。
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