CN101294762A - Multilevel high-efficiency oil-gas separating device of refrigerating system - Google Patents

Abstract

The invention provides a multilevel high-efficiency oil-gas separation device of a refrigeration system. An inner cylinder (3) with openings at upper and lower ends is fixedly mounted in an outer cylinder (5), and the upper end of the inner cylinder is connected with an inner wall of an upper end plate (2); a baffle plate (7) is also fixedly mounted in the outer cylinder (5); the baffle plate (7) is positioned below the inner cylinder (3) with the exterior of the baffle plate being fixed on the inner wall of the outer cylinder(5); and a plurality of small holes are formed on the periphery of the baffle plate (7); a filter screen (4)is arranged in the inner cylinder (3), and the exterior of the filter screen (4) is connected with the inner wall of the inner cylinder (3). Most of lubricants and refrigerants are separated after various separation steps such as centrifugal separation, impingement separation, gravity separation, filter screen separation, etc., and are stored on the lower part of an oil treatment device; the refrigerant gas is discharged from an air vent of the compressor, and enters a heat exchanger, such as a condenser, etc. The oil-gas separation rate of the whole oil-gas separation device can reach up to 99.9%.

Description

A kind of multilevel high-efficiency oil-gas separating device of refrigerating system

Technical field

The present invention relates to a kind of multilevel high-efficiency oil-gas separating device of refrigerating system.

Background technology

Compressor in the refrigeration system, the overwhelming majority adopt oil spout cooling or lubricated.Lubricating oil is used for the delivery temperature of the lubricated and reduction compressor between each friction pair.But lubricating oil is the very poor medium of a kind of heat exchange property, enter when the lubricating oil in the compressor in the heat-exchange apparatus such as condenser and evaporimeter, will on heat-transfer area, form oil film, thereby reduce their heat transfer coefficient, reduced effective heat transfer area, condensation temperature is risen, and evaporating temperature descends, and refrigerating capacity reduces.Therefore after compressor air-discharging, should increase oil treatment provisions before entering condenser, the lubricating oil major part in the compressor air-discharging is separated, send compressor back to through supercooling.

Existing Oil-gas Separation form is a lot, and washing type, centrifugal, material filling type and filtering type etc. are arranged, but owing to generally adopt simple a kind of separate mode, and institute's oil gas oil droplet size to be processed there is some difference, be difficult to the oil gas separation that reaches satisfied.

Summary of the invention the present invention is intended to overcome the deficiency of above-mentioned existing oil treatment provisions, and a kind of multilevel high-efficiency oil-gas separating device of refrigerating system of brand new is provided.Technical problem to be solved is according to oil-containing characteristics in the compressor air-discharging, by multi-form multistage Oil-gas Separation, to reach satisfied oil gas separation.Second technical problem to be solved by this invention is according to the compressor air-discharging quantitative changeization, to design the corresponding reasonable size of device key position.

The technical solution adopted for the present invention to solve the technical problems is with as follows:

A kind of multilevel high-efficiency oil-gas separating device of refrigerating system, comprise the urceolus that has upper cover and low head, upper cover is provided with escape pipe, be provided with air inlet pipe in urceolus one side, be provided with drain line in the first side of lower seal, it is characterized in that: in urceolus, be installed with up and down equal openings and upper end and be connected inner core on the upper cover inwall; In urceolus, also be installed with deflection plate; Wherein deflection plate is positioned at the inner core below, and the outside is fixed on the inwall of urceolus, and the deflection plate periphery has several apertures; In inner tube installation screen pack is arranged, this screen pack outside is connected on the inwall of inner core.

The center circle of annular compartment horizontal cross-section annulus is tangent between the central axis of air inlet pipe and inner/outer tube; Described center circle is meant and is positioned at the middle circle of annulus inside and outside circle.

According to the compressor air-discharging amount is Vm ³/ H, the air inlet pipe internal diameter $d_1=\sqrt{0.3*V}\mathrm{mm},$ The urceolus internal diameter $D_1=(\sqrt{20.9*V}+d_1)\mathrm{mm},$

Compared with the prior art the present invention has following good effect:

1), the compressor air-discharging that has lubricating oil enters this device from the air inlet mouth of pipe, through multiple separating steps such as separating of centrifugation, bump separation, Gravity Separation and screen pack, the lubricating oil and the cold-producing medium of the overwhelming majority are separated, be stored in the lower part of oil treatment provisions, and refrigerant gas is discharged heat exchangers such as entering condenser from exhaust outlet of compressor.The Oil-gas Separation rate of whole gas and oil separating plant can reach 99.9%.

2), each parts organically is integrated into a unit, compact conformation takes up an area of for a short time, is convenient to transportation and installs.

3), various computing formula has guaranteed the design current velocity of oil gas in the respective handling step, and then has guaranteed the separating effect of whole device.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the schematic top plan view of Fig. 1.

The specific embodiment

Below in conjunction with accompanying drawing and instantiation the present invention is elaborated.

As shown in Figure 1, this example comprises urceolus 5, and urceolus 5 has upper cover 2 and low head 8, and low head 8 is supported by supporting leg 10.Upper cover 2 is provided with escape pipe 1, is provided with air inlet pipe 6 in urceolus 5 one sides, is provided with drain line 9 in low head 8 one sides.Adopt welding manner to connect between aforementioned each parts.

In urceolus 5, be installed with up and down equal openings and upper end and be connected inner core 3 on upper cover 2 inwalls, in urceolus 5, also be installed with deflection plate 7.Wherein deflection plate 7 is positioned at inner core 3 belows, and the outside adopts the spot welding ways of connecting to be fixed on the inwall of urceolus 5, and deflection plate 7 peripheries have several apertures.At inner core 3 screen pack 4 is installed, these screen pack 4 outsides are connected on the inwall of inner core 3.

As shown in Figure 2, the center circle of annular compartment 11 horizontal cross-section annulus is tangent between the central axis of air inlet pipe 6 and inner/outer tube.Described center circle is meant and is positioned at the middle circle of annulus inside and outside circle.

Workflow of the present invention is:

The first step: the fuel-air mixture body enters annular compartment 11 between inner/outer tube from air inlet 6 by tangential direction shown in Figure 2, around the space rotation of annular compartment 11, flows from top to bottom.Borrow the action of centrifugal force oil droplet that density in the exhaust is bigger to throw and separate on urceolus 5 inwalls, flow down along this inwall, the aperture around deflection plate 7 enters tube bottom.

If the compressor air-discharging amount is Vm ³/ H, air inlet pipe 6 internal diameters $d_1=\sqrt{0.3*V}\mathrm{mm},$ Urceolus 5 internal diameters $D_1=(\sqrt{20.9*V}+d_1)\mathrm{mm}.$ This design formula guarantees that the air inlet pipe flow velocity is about 15m/s, and entering annular compartment 11 interior rotary speeies is about 10m/s.

Second step: after the fuel-air mixture body flows out from annular compartment 11, gas relies on inertia and speed to continue to flow downward, upwards turn back behind the bump deflection plate 7, change the direction of air-flow, lubricating oil in the gas is because density is bigger, separate from gas and be deposited on the deflection plate 7, and the aperture around the deflection plate 7 enters tube bottom, lubricating oil is further separated.And enter inner core 3 inside behind the gas baffling, and the gas flow area sudden enlargement, the gas flow rate rapid drawdown, because the density of little oil droplet is higher than Working medium gas, the lubricating oil that gas is carried further separates the whereabouts.

Still establishing the compressor air-discharging amount is Vm ³/ H, then inner core 3

Can guarantee gas enter inner core 3 when inner flow velocity reduce to below the 0.8m/s.

The 3rd step: gas is separated from gas through above-mentioned separating most lubricating oil, the remaining gas that the contains lubricating oil screen pack 4 in the inner core 3 of flowing through, separation and filtration by screen pack 4, make in the gas on the contained very little filter silk of lubricating oil drop attached to screen pack 4, along with the increase of adhesion amount forms big oil droplet, rely on the gravity effect to flow down along inner core 3 inwalls.Gas is discharged from escape pipe 1.

Internal diameter of the present invention, external diameter all refer to diameter.

Claims (3)

1, a kind of multilevel high-efficiency oil-gas separating device of refrigerating system, comprise the urceolus (5) that has upper cover (2) and low head (8), upper cover (2) is provided with escape pipe (1), be provided with air inlet pipe (6) in urceolus (5) one sides, be provided with drain line (9) in low head (8) one sides, it is characterized in that: in urceolus (5), be installed with up and down equal openings and upper end and be connected inner core (3) on upper cover (2) inwall; In urceolus (5), also be installed with deflection plate (7); Wherein deflection plate (7) is positioned at inner core (3) below, and the outside is fixed on the inwall of urceolus (5), and deflection plate (7) periphery has several apertures; At inner core (3) screen pack (4) is installed, this screen pack (4) outside is connected on the inwall of inner core (3).

2, multilevel high-efficiency oil-gas separating device of refrigerating system as claimed in claim 1 is characterized in that: the center circle of annular compartment (11) horizontal cross-section annulus is tangent between the central axis of air inlet pipe (6) and inner/outer tube; Described center circle is meant and is positioned at the middle circle of annulus inside and outside circle.

3, multilevel high-efficiency oil-gas separating device of refrigerating system as claimed in claim 1 or 2 is characterized in that: according to the compressor air-discharging amount is Vm ³/ H, air inlet pipe (6) internal diameter $d_1=\sqrt{0.3*V}\mathrm{mm},$ Urceolus (5) internal diameter $D_1=(\sqrt{20.9*V}+d_1)\mathrm{mm},$ Inner core (3)

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