CN101166942A

CN101166942A - Coolant collector comprising a filter/dryer unit

Info

Publication number: CN101166942A
Application number: CNA2006800144425A
Authority: CN
Inventors: P·克鲁格
Original assignee: Eaton Fluid Power GmbH
Current assignee: Eaton Fluid Power GmbH
Priority date: 2005-03-01
Filing date: 2006-03-01
Publication date: 2008-04-23
Anticipated expiration: 2026-03-01
Also published as: US20080282727A1; EP1853859A2; DE102005009191B3; EP1853859B1; CN100538215C; WO2006092285A2; DE502006004303D1; ATE437345T1; ES2329169T3; WO2006092285A3

Abstract

Disclosed is a coolant collector (1) comprising a filter/dryer unit (10) and an elongate, vertically oriented interior space which is subdivided into an upper area (38) and a lower area (39) by means of the filter/dryer unit (10). A flowing coolant is delivered to the filter/dryer unit (10) via a pipe (7). The outlet windows of the filter/dryer unit (10) are located on the outer circumference thereof which delimits a relatively narrow gap along with the wall (3) of the receptacle (2) of the coolant collector (1). Liquid components drip downwards and accumulate below the filter/dryer unit while gaseous components accumulate primarily above the filter/dryer unit (10).

Description

The coolant collector of band filtration/drying unit

Technical field

The present invention relates to a kind of coolant collector that is used for the band filtration/drying unit of refrigeration plant.Coolant collector of the present invention is particularly suitable for air conditioning equipment of car, in this article, is particularly suitable for carbon dioxide is come the air-conditioning equipment of work as cold-producing medium.

Background technology

Usually cold-producing medium flows through coolant collector, and wherein said gatherer keeps stable cold-producing medium storage level.Described cold-producing medium storage level is replenished a spot of loss of refrigerant of refrigeration machine and different application conditions thereof.The liquid refrigerant that therefore, certain storage level is arranged in coolant collector usually.Cold-producing medium must be dry.If the inappropriate position in refrigeration machine freezes, just may cause the damage of operation troubles and refrigeration machine.Therefore refrigeration plant has drier usually, for example inner tubulose vessel that absorbent material such as particle are housed.Cold-producing medium flows through described absorbent material.Wherein key is to guarantee fully close contact between cold-producing medium and the drier material.

CO particularly ₂The compressor of refrigeration machine also has the compressor of other refrigeration machine relatively more responsive to the drop and the particularly solid particle that suck.The cold-producing medium stream of therefore wishing to guarantee compressor reliably and being sucked does not particularly comprise any solid particle.

Summary of the invention

Therefore, the objective of the invention is, the unit of at least some problems of the technical simple and reliable method of a kind of usefulness in addressing the above problem is provided.

This purpose is used by the coolant collector that has built-in filtration/drying unit of claim 1 and is realized:

Coolant collector of the present invention is basic shape with a upright pressure vessel, and this container has wall, bottom surface and top cover, thereby surrounds a closed inner chamber.One first pipe inserts this inner chamber, and one second pipe is drawn from this inner chamber.One filtration/drying unit is set in inner chamber, and this filtration/drying unit is by the pipe feed that inserts inner chamber.Wherein cold-producing medium roughly supplies to the middle part of filtration/drying unit.This filtration/drying unit has at least one outlet, but preferably has a plurality of large-area outlets, and the cross section of this outlet surpasses the cross section of input pipe.Outlet feeds the inner chamber of container, and therefore both can gather oil in this inner chamber also can gather liquid refrigerant.The pipe of drawing from this inner chamber has a upper, open end, and this openend preferably is arranged on filtration/drying unit top.This pipe stretches out from inner chamber from this position, and this pipe is preferably walked around filter/drying unit setting with U-loop here, and wherein the lower knuckle pipeline section of the pipe that stretches out from inner chamber directly extends across container bottoms.One pump orifice preferably is set, the pasta that the bottom cutting of bending tube section forms in container in this zone.Therefore the refrigerated medium stream that leaves container can suck and take away a certain amount of oil by pump orifice.Wish to come the lubricated compressor that is connected with these oil.

Surround a partial volume of inner chamber between pasta and filtration/drying unit, cold-producing medium can be present in this partial volume with liquid phase.The amount of liquid refrigerant can fluctuate with service condition.But filtration/drying unit separates the opening pipe end of cold-producing medium liquid level with the precipitous ground projection that makes progress of the pipe that stretches out from inner chamber, make the cold-producing medium splash can not enter the opening pipe end, and also can not enter the opening pipe end in coolant collector is installed in automobile the time because of rapid driving skills or the road surface of jolting.

In a kind of preferred embodiment, the chamber wall of coolant collector is made cylindricality, and container bottoms vaults.The latter has such advantage, promptly also can reach sufficiently high pasta with little oil mass, so that banish oil fully to cold-producing medium.In addition, this shapes of containers is withstand voltage especially.

The top cover of container is preferably made flat or slightly rounded, and wherein two tubes inserts in the container abreast and draws from container.Therefore formation one is roughly the steam chest of cylindricality above filtrations/drying unit, mainly exists with gas phase and cold-producing medium can easily be drawn out of at this steam chest inner refrigerant.In addition, two pipes of arranging that preferably are parallel to each other side by side connect simple and very clear.

Preferably, filtration/drying unit occupies the entire cross section of inner chamber by this way, and promptly described unit and chamber wall only limit a narrow annulus.Cold-producing medium comes out from this annulus, enters upper area as steam chest with less flowing velocity.Be positioned at the rocking motion and can cause liquid refrigerant to enter zone above filtrations/drying unit hardly of cold-producing medium liquid level of filtration/drying unit below.Because the preferred heights (axial length) of filtration/drying unit is preferably more than the diameter of described unit, so liquid refrigerant can not enter the zone of filtration/drying unit top more.

Liquid refrigerant and oil from the annulus drip downwards and collect in filtration/drying unit below.Wherein, liquid CO ₂Swim on the pasta.

In principle, the oil that collects in below filtration/drying unit can be extracted out from container and be added in the oil stream by capillary or independent pipeline.The pipe of therefore, drawing from inner chamber can directly outwards be drawn from top steam chest district.But, as simple and durable scheme, preferably, the pipe that guides this to draw from inner chamber--ground but also the ground that can rise not only can descend--passes between wall and filtration/drying unit, therefore the bending tube section below the cold-producing medium of extracting out in top steam chest district passes through mixes oil in this bending tube section inner refrigerant.

Preferably, filtration/drying unit comprises that one has the housing that a flat top and is roughly the periphery of cylindricality.This unit separates liquid refrigerant and steam attitude cold-producing medium with effective method.In addition, this unit provides enough big inner chamber to hold a large amount of drier.

Filtration/drying unit is provided with a taper bottom surface and proves very favorable.Wherein, the tip, bottom surface is preferably located in the roughly below of input pipe, housing center.Here cone angle is bigger, preferably between 120 ° to 170 °.This bottom shape is both also proving favourable in pure practice aspect the flow model of setting up, because described shape allows desiccant particle densification well when filtration/drying unit seals.This is specially adapted to when the housing of the filtration/drying unit of being packed into from the below in the bottom surface and the situation fixedly time the by latch elements for example then.Desiccant particle is radially flow through basically, and wherein flowing velocity is very little and outwards reduce gradually.Can closely contact thereby make between desiccant particle and the liquid refrigerant.Little flowing velocity causes pressure drop little on coolant collector in filtration/drying unit housing.

Preferably, adopt the spherical particle body as desiccant particle, this brings contact best between cold-producing medium and the desiccant particle.

Filtration/drying unit is provided with an input basket at arrival end, and this input basket circumferentially and on its bottom surface has outlet at it, for example hole and groove.The input basket allows refrigerant fluid to introduce in the desiccant particle with low pressure drop.Preferably, a filter with meticulous sieve aperture is set in the exit of filtration/drying unit housing.This filter for example is made of meticulous high-grade alloy steel net, high-grade alloy steel felt or the like.Slot size is preferably in 30 μ m to 60 mu m ranges.

The taper bottom surface is a precondition of impelling gas phase and liquid phase to separate well.Avoided liquid refrigerant and/or oil accumulation reliably in filtration/drying unit.Therefore, desiccant particle itself does not have liquid, thereby its validity is not subjected to the influence of oil or liquid refrigerant.

Described output window almost occupies the whole periphery of filtration/drying unit housing.This further impels by flowing slowly and effectively utilizes drier, and discharges liquid refrigerant and oil reliably in filtration/drying unit housing.

Description of drawings

Other details of advantageous embodiment of the present invention is the content of accompanying drawing, specification or claim.Exemplary embodiment of the present invention shown in the drawings.Shown in the figure:

Fig. 1 illustrates complete coolant collector with perspective view;

Fig. 2 illustrates coolant collector shown in Figure 1 with the perspective view of vertically cutting open;

Fig. 3 illustrates coolant collector shown in Figure 2 with vertical sectional view together with the additional cutaway view of its filtration/drying unit;

Fig. 4 illustrates the filtration/drying unit of the coolant collector shown in Fig. 2 and 3 with vertical sectional view; And

Fig. 5 illustrates coolant collector shown in Figure 1 with broken section.

The specific embodiment

Fig. 1 illustrates a coolant collector 1, and this coolant collector comprises an external container 2 that is made of Aluminum Bottle.This Aluminum Bottle has one and has a cylindrical wall 3 that is essentially the bottom surface 5 that flat upper top cover 4 and a for example sphere arch upward.Bottom surface 5 can be provided with a hole, is screwed into an explosion-proof plug (Berststopfen) 6 in this hole.Container 2 is respectively in the face of all sealings outward.This container can be welded by two or more parts, and wherein weld seam does not draw in Fig. 1.Preferably, container 2 is made not welding or soldering seam, that is is not to be processed into welding and soldering.For this reason, at first produce a hollow cylindrical blank that has comprised upper top cover 4.If all parts of packing into that the back will illustrate all have been fixed in the container 2, so at 5 places, bottom surface of this container with a cold bending operation or another selectable forming process sealing, make and only stay one to come blind bore by stopper 6.This manufacture method allows to make the container 2 with less wall thickness, even this container is at the very high fracture pressure design that for example surpasses 200bar.The variation of the material structure that causes by temperature load of in addition, having got rid of that other occurs when welding or soldering.

Two

tubes

7,8 inserts in the inner chamber 9 that is surrounded by container 2 or from the inner chamber the inside by upper top cover 4 and extracts, as shown in Figure 2.Here, the end of

pipe

7,8 passes upper top cover 4 in parallel to each other.Pipe 7 is configured to cold-producing medium is introduced the input pipeline of coolant collector 1, and this pipe leads to a filtration/drying unit 10 that is installed in the inner chamber 9 in the independent housing 11.The end 12 that wherein is contained in the pipe 7 in the inner chamber 9 leads to a central tube joint, and this joint is installed on the housing 11, that is exactly on the flat end face 13 of being preferably of housing 11.In addition, housing 11 has a cylindricality periphery 14, and the diameter of this cylindricality periphery is slightly less than the internal diameter of wall 3, so between forms a slit.In order to regulate this slit definitely and to make housing 11 centering in container 2, peripheral 14 are provided with the spaced-apart bosses 15 of projection radially outward, and these boss are preferably designed so that vertically, that is the shape of axially extended

elongated muscle

16,17,18.In addition,

form output window

19,20,21,22,23 (seeing Fig. 2 and 3) on peripheral 14, described output window opens wide inner chamber as seen from Figure 3 24 inner chamber 9 towards housing 3 on its whole peripheral surface of housing 11.Output window 19 to 23 only separates by narrow rib mutually, and these ribs will be positioned at upper cover plate on the end face 13 and following ring 25 couples together, and this ring is used for fixing the bottom surface 26 that is contained in the housing 11.Output window 19 to 23 can be equipped with a plastic grill, the filter that this grill bearing is mounted, the back will illustrate and prevent between erecting stage that particularly filter is subjected to manual infringement.

Preferably, bottom surface 26 and housing 11 the same being made of plastics.Described bottom surface has one from an endless belt 27 upwardly extending conical bottom sections 28, and this end section has preferred about 130 ° to 150 a ° cone angle.Preferably, bottom surface 26 is connected with ring 25 by the latch elements that is not shown specifically, and the outward flange 29 of described bottom surface is pressed close to the top edge of ring 25 or is arranged on ring 25 top edges top nearby.

Output window 19 to 23 seals by the filter with meticulous sieve aperture.This filter for example can be made of high-grade alloy steel net, high-grade alloy steel felt or the like.Slot size is preferably in the scope of 30 μ m to 60 μ m.

The one input basket 31 that preferably fuses with the upper cover plate of housing 11 is set in the inner chamber 24 of housing 11.Input basket 31 has for example shape of cylindricality.Described input basket upwards is provided with groove 32 in its week, forms porose 33 on its bottom surface.Preferably, groove 32 and hole 33 have the width that is no more than 0.8mm.In any case but the width in groove 32 and hole 33 is less than the granularity that is contained in the dried particles in the inner chamber 24.This particle is used for absorbing water.

Housing 11 at mutually radially relative position or the position of arranging by other means have flute profile, preferably be roughly the breach of cylindrical shell shape, pipe 8 passes these breach.Pipe 8 stretches to the bottom surface 5 of container 2 vertically downward from the openend that is positioned at filtration/drying unit 10 tops.Corresponding straight length 34 is transformed into a bending tube section 35 below filtration/drying unit 10, begin pipe 8 from this pipeline section and stretch to upper top cover 4 and pass described upper top cover protruding through filtration/drying unit 10 next doors once more with another pipeline section 36.Wherein bending tube section 35 is distributed in the tight top of bottom surface 5, especially as shown in Figure 5.5 nearest positions, deep are provided with a SS 37 to this bending tube section from the bottom surface at bending tube section 35.This SS has little diameter, and is used for adding oil to the cold-producing medium that flows in bending tube section 35.

Aforesaid coolant collector 1 work is as follows:

When operation, container 2 vertically is provided with, that is its

pipe

7,8 perpendicular feed inner chamber 9.The axis of cylindrical wall vertically extends.Cold-producing medium at first flows into filtration/drying unit from refrigeration machine by pipe 7, and this filtration/drying unit is divided into a upper area 38 and the lower area 39 as liquid header as steam chest with inner chamber 9.The three-phase mixture that cold-producing medium normally is made up of gaseous refrigerant, liquid refrigerant and fluid oil particle.This mixture at first enters input basket 31, and through groove 32 and hole 33 leave the input basket and arrive fine and close packing, be preferably spherical drier body.Here, mixture flows into end sections 28 by hole 32, and this end section makes the deflection radially outward of flowing, and makes mixture flow through more evenly, lentamente to be fixed on drier bag in the inner chamber 24.Liquid part, that is liquid refrigerant and oil arrives end section 28, and flow out laterally along this end section.Liquid refrigerant and oil leave filtration/drying unit 10 by output window 19 to 23, flow into downwards by the 39 branch chambeies that form, zone at ring 25 places then.Gaseous refrigerant then mainly collects in the zone 38 of inner chamber 9, and is extracted out from inner chamber by pipe 8.

Below filtration/drying unit 10, form the liquid storage of forming by oil and liquid refrigerant.Because the density difference, both are separated from each other.This is specially adapted to adopt CO ₂Situation during as cold-producing medium.Forming one and have the oil capacity 40 of pasta 41 above bottom surface 5, is the liquid refrigerant capacity 42 with cold-producing medium liquid level 43 above pasta.Pasta 41 is positioned at SS 37 tops at least.Cold-producing medium liquid level 43 is positioned at the below at edge 29 at least, is preferably located in the below of ring 25.

The vaporous cryogen that exists in zone 38 flows through pipeline section 34 and bending tube section 35, and at this moment cold-producing medium is taken away fluid by SS 37.SS 37 also can be regarded permeability hole as, and this hole is limited in the oil in the pipe 8 on the desired low degree.A plurality of this holes can be set in case of necessity.In addition, can between bending tube section 35 and explosion-proof plug 6, for example wire netting be set, the filter of metal felt or the like form.

Filtration/drying unit 10 not only is used for dry cold-producing medium, and is used for cutting apart so effectively inner chamber 9 simultaneously, and making does not have splash to enter in the openend of pipeline section 34 from refrigerant charge 42 surfaces that may seethe with excitement sometimes or rock owing to external movement.Obtain a kind of in this way simply with the combination coolant collector of built-in filtration/drying unit 10.

The coolant collector 1 that has filtration/drying unit 10 has a vertically arranged elongated lumens, and this inner chamber is divided into a upper area 38 and zone, a bottom 39 by filtration/drying unit 10.The cold-producing medium that flows into flows to filtration/drying unit 10 by pipe 7, and this filtration/drying unit is placed outside it has output window, and the wall 3 of the container 2 of this periphery and coolant collector 1 surrounds a narrower slit.Liquid part drips and collects in filtration/drying unit below downwards.The gaseous state part mainly collects in filtration/drying unit 10 tops.

Claims

1. coolant collector (1) has:

Upright pressure vessel (2), this container have wall (3), bottom surface (5) and upper top cover (6), and described wall, bottom surface and upper top cover surround an inner chamber (9);

Feed the pipe (7) of inner chamber (9), this pipe has an end (12) that is arranged in the inner chamber (9);

Filtration/drying unit (10), this filtration/drying unit are connected on the end that is positioned at inner chamber (9) (12) of the pipe (7) that feeds inner chamber (9), and are arranged on a distance, top, bottom surface (5);

The pipe (8) of drawing from inner chamber (9), this pipe have an openend that is arranged on inner chamber (9) inner filtration/drying unit (10) top.

2. by the described coolant collector of claim 1, it is characterized in that, the pipe (8) of drawing from inner chamber (9) extends to the bending tube section (35) that is arranged on bottom surface (5) from the openend of this pipe, and then rise, from container (2), stretch out, wherein on this bending tube section (35), be provided with at least one SS (37).

3. by the described coolant collector of claim 1, it is characterized in that the wall (3) of described container (2) is made cylindricality.

4. by the described coolant collector of claim 1, it is characterized in that the bottom surface (5) of described container (2) vaults.

5. by the described coolant collector of claim 1, it is characterized in that the upper top cover (4) of described container (2) is made flat, two tubes (7,8) inserts container (2) side by side or draws from container (2).

6. by the described coolant collector of claim 1, it is characterized in that described filtration/drying unit (10) occupies the entire cross section of inner chamber (9), and surround an annulus with wall.

7. by the described coolant collector of claim 1, it is characterized in that the pipe (8) of drawing not only can descend but also can pass with rising from inner chamber (9) between wall (3) and filtration/drying unit (10).

8. by the described coolant collector of claim 1, it is characterized in that, described filtration/drying unit (10) has the housing (11) that is roughly the periphery (14) of cylindricality with a flat end face (13) and, stretch out spaced-apart bosses (15) from this periphery towards described wall, to be used for being resisted against described this housing of wall upper support.

9. by the described coolant collector of claim 1, it is characterized in that described filtration/drying unit (10) has a taper bottom surface (26).

10. by the described coolant collector of claim 1, it is characterized in that described filtration/drying unit (10) has a central tube joint on its end face (13), this joint is connected with the pipe (7) that feeds inner chamber (24).

11. by the described coolant collector of claim 10, it is characterized in that described filtration/drying unit (10) surrounds a container cavity (24), the input basket (31) that is connected on the tape input mouth (32,33) on the central tube joint in succession be installed in this container cavity always.

12., it is characterized in that the input port of described filtration/drying unit (10) is designed to hole (33) or the groove (32) that width is not more than the granularity of desiccant particle by the described coolant collector of claim 11.

13., it is characterized in that described filtration/drying unit (10) is placed has output window (19,20,21,22,23) outside it by the described coolant collector of claim 1.

14., it is characterized in that the output window of described filtration/drying unit (10) (19,20,21,22,23) almost occupies the whole periphery of described filtration/drying unit (10) by the described coolant collector of claim 13.

15., it is characterized in that the output window of described filtration/drying unit (10) (19,20,21,22,23) is provided with a filter (30) by the described coolant collector of claim 13.

16., it is characterized in that the filter (30) of described filtration/drying unit (10) is made of a high-grade alloy steel net with meticulous sieve aperture by the described coolant collector of claim 1.

17., it is characterized in that described filtration/drying unit (10) has a housing that is made of plastics (11) by the described coolant collector of claim 1.

18. by the described coolant collector of claim 17, it is characterized in that described filtration/drying unit (10) has a bottom surface, this bottom surface and remaining housing (11) kayser.

19., it is characterized in that described filtration/drying unit (10) roughly is arranged on half place of inner chamber (9) height or on mid-height by the described coolant collector of claim 1.

20. by the described coolant collector of claim 2, it is characterized in that, described SS (37) be arranged on bending tube section (35) on the downside of bottom surface (5).