CN102667389B

CN102667389B - Inner heat exchanger, particularly for motor vehicle air conditioners

Info

Publication number: CN102667389B
Application number: CN201080043284.2A
Authority: CN
Inventors: 克劳斯·勒克; 安德烈亚斯·戈尔泽尔
Original assignee: ContiTech Kuehner GmbH and Cie KG
Current assignee: ContiTech Techno Chemie GmbH
Priority date: 2009-09-28
Filing date: 2010-09-02
Publication date: 2014-04-30
Anticipated expiration: 2030-09-02
Also published as: DE102009044119A1; WO2011036044A3; WO2011036044A2; CN102667389A; EP2486356A2; EP2486356B1

Abstract

The invention relates to an inner heat exchanger for separately guiding a cooling fluid flow and a fluid flow to be cooled. In order to improve the heat transfer between the two separately guided fluid flows, a cylindrical flow body (20) is provided, comprising a convex impact surface (42) on the front end thereof. A plurality of individual tubes (12) forming a parallel tube bundle are disposed on a circumference of a circle in the flow body (20), guiding the fluid flow to be cooled. The individual tubes are located in longitudinal holes (43) of the flow body (20) extending in parallel axes, forming an annular gap (45) through which the cooling fluid flows.

Description

Be particularly useful for the inner heat exchanger of air conditioner of motor vehicle equipment

Technical field

The present invention relates to a kind of inner heat exchanger that is particularly useful for air conditioner of motor vehicle equipment, this heat exchanger is with a housing in order to guide dividually the fluid stream of a cooling and the fluid stream that one will be cooled, and these fluid streams import or derive by being arranged in a plurality of attaching parts of this shell end.

Background technology

Inner heat exchanger is as the heat exchanger of the cooling device of fuel cooler, oil pressure pipeline and fixing cooling device.They are generally used for the medium of cooling fluid transmission or gas transport.A main application of inner heat exchanger is in air conditioner of motor vehicle equipment.

A kind of possibility that improves the efficiency be applied to the air-conditioning equipment in motor vehicles is to adopt a kind of inner heat exchanger, in this inner heat exchanger the low-pressure side of cold-producing medium to reflux moving and on high-tension side be flowing in to be forward separated from each other in passage adjacent one another are realize.By these two kinds of cold-producing medium streams being carried out to this adjacent, that move with adverse current or following current, separated guiding, additionally cooling cold-producing medium in the passage of high-pressure side, and do not need to consume extra energy for this reason.

From the known a kind of single-piece heat-exchange tube with a multi-chamber section bar of EP 1 202 016 A2, this heat-exchange tube has a centre gangway, around this centre gangway arrangement, has a plurality of outer tunnels.These outer tunnels are by the midfeather extending diametrically demarcate.On the wall of this centre gangway, be provided with to a plurality of protuberances that extend in this centre gangway.Thereby these protuberance effects for reducing cross-sectional area and improving flow velocity.These protuberances can be configured to spirality.Internal channel is as high-pressure side, and outer tunnel is as low-pressure side.In this device, heat exchange is unsatisfactory, because these outer tunnels are arranged on a concentric circles of this centre gangway and only adjoin the centre gangway of this guiding high-pressure side refrigerant fluid with the bottom tip (Fu β spitzen) of its inclination.Therefore, the refrigerant fluid in this centre gangway and the heat transmission between the colder refrigerant fluid in outer tunnel are ineffective especially.

From the known a kind of inner heat exchanger being formed by the coaxitron system of a two-piece type of DE 199 44 950 A1.Inner tube injects in an outer tube of this coaxitron system or coextrusion together with this outer tube.Annular space between this inner tube and this outer tube has formed a pipe vertical passage, by contact pin or waveform muscle, this pipe vertical passage is divided into a plurality of parallel outside vertical passages.These outside vertical passages can be taked a kind of spiral trend, to extend the fluid path of the directed cold-producing medium through wherein.Although improved thus this cold-producing medium stream and the thermo-contact being guided through between the cold-producing medium stream of this inner tube, still do not reach air-conditioning equipment efficiency further, raising significantly.

From the known a kind of inner heat exchanger that is configured to coaxitron of DE 10 2,005 056 651 A1, this inner heat exchanger is configured to the cold-producing medium stream for guiding dividually these two kinds to have different pressures level.In the interior space of an inner tube, be provided with a spiral vortex generator.This spiral turns to cold-producing medium mobile in this inner tube, thereby makes can not form laminar flow in wall region.Should produce thus the immixture of improvement and the heat exchange action of improvement.These outer tunnels of guiding adverse current are in an annular wall this inner tube, this coaxitron.Effectively heat transmission is impossible.

Summary of the invention

Basic object of the present invention is to design a kind of inner heat exchanger that starts illustrated type herein, thereby improve the significant degree of the heat exchange between these two kinds of fluid streams that guided dividually by this inner heat exchanger.

According to the present invention, this object is to realize by the feature described in the characteristic of claim 1.

In order to import and derive the liquid of cooling and the liquid that will be cooled in this heat exchanger, at the two ends of this cylindrical flow body, be provided with a plurality of attaching parts, by these attaching parts, will mainly with flow through these fluids of this inner heat exchanger of the convection current method of operation, mutually import dividually and derive.

By the present invention proposes in formation, have under the prerequisite of an annular gap of an outside vertical passage, there is an outer tube and a coaxitron principle that is arranged in coaxially a kind of inner heat exchanger of inner tube wherein.According to the present invention, at a cylindrical flow body that forms this housing

middle arrangement has the circular tube bank of of a plurality of individual pipes, the one-component of the fluid stream that these individual each bootstraps of pipe will be cooled.These individual pipes are arranged in a pipe vertical passage separating and in wherein being flowed in directly contacting around washing away (umsp ü lt) by the fluid of this cooling in this shell length separately.Can reach thus a kind of unconsummated in the situation that of the known mediate contact principle of prior art embodiment, especially effectively heat transmission.

A favourable embodiment of the present invention is open in the characteristic of claim 2.With the cavity of annular wall restriction that the space from end of this flow body is turned up the soil and arranged, each the independent chilled fluid flow flowing out from this longitudinal hole is again converged this cavity.

In another favourable embodiment of the present invention, the housing of this inner heat exchanger has an outer tube, and this flow body is arranged in this outer tube matchingly.This outer tube forms a ledge that exceeds this flow body at its end

corresponding attaching parts can be inserted in this ledge hermetically.

In another favourable embodiment, form this outer tube and this flow body single-piece.This has the substantive advantage in manufacturing technology.

In favourable embodiment of the present invention, this individuality pipe has a kind of cross section of star.Thus, because surface is larger, again increased film-cooled heat.

The favourable embodiment of these attaching parts structures is disclosed in claim 6 to 8.On flange connector externally, formation and arrangement have a distributor ring, and this distributor ring plays the effect of the fluid stream that distribution will be cooled equably.

In another favourable embodiment of the present invention, on this flow body, relative with this deflection plane end face end, arrange to have a mushroom-shaped, axially extended interval keeper, on the periphery of its collar-shaped, arrange to be useful on the semi-cylindrical canyon of the end that receives these individual pipes.Shape by this mushroom hair style prevents that the fluid stream of cooling is disconnected hereinto.On the whole length of these individual Guan Qi and whole periphery by around washing away.

A plurality of on this interval keeper axially form a clearance space to overhanging interval projection (Abstandsnocken), and the partial discharge of the fluid stream of this cooling can again converge in this clearance space.

In another favourable embodiment of the present invention, in these individual pipes, connect arranged perforation, this pipe in spatial division become the contact pin of a plurality of part passages, and these contact pin have the cross arrangement of dividing the interior cross section of this pipe.By this configuration, the flow velocity of this cooling fluid stream and the efficiency that heat is transmitted have been improved.

By the present invention, realized a kind of high-effect inner heat exchanger of compact conformation, it is specially adapted in air conditioner of motor vehicle equipment, is particularly useful in the CO2 air-conditioning equipment of motor vehicles.Yet this inner heat exchanger is also suitable as the high-effect fuel cooler in automotive field.It can generally flow two fluids with different temperatures level the occasion being mutually closely guided through with heat exchange method by means of inner heat exchanger for those.

Accompanying drawing explanation

Explain with reference to the accompanying drawings two embodiment of the present invention.In the accompanying drawings:

Fig. 1 illustrates an inner heat exchanger that forms the cylindrical flow body of housing with the schematic diagram decomposing, have an X-rayed, this flow body injects in an outer tube;

Fig. 2 with front view illustrate this inner heat exchanger, be inserted in the flow body in this outer tube;

Fig. 3 use the longitudinal profile through Fig. 2 center line II-II illustrate this inner heat exchanger, be inserted in the flow body in this outer tube;

Fig. 4 illustrates cylindrical flow body in this outer tube of insertion, a tube bank of guiding with facing detail view;

Fig. 5 is with partly cuing open the flow body illustrating shown in Fig. 4;

Fig. 6 illustrates a collector flange of these two attaching parts with longitudinal profile;

Fig. 7 illustrates an outside flange connector of one of these two attaching parts, with the distributor ring being placed on its connecting tube (Anschlussstutzen);

Fig. 8 illustrates the attaching parts that are comprised of this collector flange and flange connector and distributor ring placed on it, the state of these attaching parts in being plugged together;

Fig. 9 illustrates the embodiment of a modification of this cylindrical flow body;

Figure 10+11 illustrate the front view of the flow body shown in Fig. 9;

Figure 12 illustrates a perspective view of the flow body shown in Fig. 9 to Figure 11;

Figure 13 illustrates and is inserted in flow body in an outer tube, shown in Fig. 9 to Figure 10 with longitudinal profile.

Reference marker inventory

(part for description)

11 outer tubes

12 individual pipes

13 collector flanges

14 flange connectors

15 collector flanges

16 flange connectors

13,14 attaching parts

15,16 attaching parts

17 connection opening

18 collector channel, distributor space

19 connecting through holes

20 columniform flow bodies

21 central openings, inflow through hole, outflow through hole

22 connecting tubes

23 circumferential groove

24 circumferential groove

25 sealing rings

26 sealing rings

27 supporting eyelets

28 connecting tubes

29 sealed pipe fittings

31 grooves

32 sealing rings

33 sealing rings

34 circumferential groove

35 distributor rings

42 deflection planes

43 longitudinal holes

Arch upward in 44 centers

The gap of 45 annulars

46 annular walls

47 central openings

48 cavitys

49 receiving through-holes

The opening of 50 distributor rings

51 collars

52 bottoms

The end of 53 distributor rings

54 distributor spaces

20 ' flow bodies

60 interval keepers

61 depressions

62 interval projections

The specific embodiment

Inner heat exchanger shown in Fig. 1 have an outer tube 11 and one insert matchingly in outer tube 11, be configured to columniform flow body 20.In these flow body 20 axis, arrange to be abreast positioned at nine individual pipes 12 on a circumference.A kind of fluid stream that will be cooled (hereinafter referred to " heat " fluid stream) is flowing in direction in arrow A in these individual pipes 12.The adverse current of cooling (hereinafter referred to " cold " fluid stream) is by 20 guiding of flow body and in the direction of arrow B, flow through this heat exchanger.Flow body 20 also will explain in other places below.

In order to import and derive these cold and hot fluid stream in the cylindrical flow body 20 forming this heat exchanger shell, the attaching

parts

13,14 and 15,16 of two-piece type are respectively set at the two ends of flow body 20, through these attaching parts mainly with the adverse current method of operation separated from one another import and derive these fluids stream.

Each attaching

parts

13,14 and 15,16 by each outside flange connector 14 and 16 and each collector flange 13 and 15 form in fact two parts.Each collector flange 13 and 15 has the connection opening 17 of corresponding nine perforations, and after this heat exchanger is installed, these connection opening receive the end of these nine individual pipes 12 hermetically.These connection opening 17 end at one by flange connector 14 and 16 and corresponding collector flange 13 and 15 be plugged together in the annular collection channel 18 forming, this collection channel is via a connecting through hole outside axis 19 and being connected with the Fluid Circulation not illustrating in corresponding, figure in flange connector 14 and 16.

These two attaching

parts

13,14 and 15,16 structures are implemented in the same manner, and correspondingly there is central opening 21 perforation, middle, this central opening flushes with flow body 20 hermetically, and the cold fluid of the flow body 20 of flowing through is connected with the Fluid Circulation not illustrating in corresponding, figure.

Together with corresponding attaching

parts

13,14 and 15,16 are installed to heat exchanger shell as follows (Fig. 1 and Fig. 6 to Fig. 8).Collector flange 13 and 15 has one with two circumferential groove, 23 He24 center connecting tubes 22, in these circumferential groove, can correspondingly be installed into a sealing ring 25 and 26.Collector flange 13 and 15 inserts in the outstanding fringe region of outer tube 11 suitably, hermetically with its connecting tube 22, and is connected with the individuality pipe 12 of flow body 20 hermetically on end face.

Outside flange connector 14 and 16 correspondingly has two

coaxial pipe fittings

28 and 29 that arrange mutually.There is groove 31 that larger-diameter connecting tube 28 has a periphery to receive a sealing ring 32.There is the connecting tube 29 of small diameter to there is equally a circumferential groove 34 to receive another sealing ring 33.Connecting tube 28 is configured to annular wall, holds a distributor ring 35 this pipe fitting periphery, and this distributor ring has a central opening 50, and the internal diameter of this central opening is greater than the external diameter of that pass therethrough, less sealed pipe fittings 29.

Distributor ring 35 with one outside, to the collar 51 of back bending song and be fastened on the free end of connecting tube 28.On the other end of distributor ring 35, this distributor ring has one radially to the bottom 52 of inner process, and its end 53 axially extends to returning agley.The bottom 35 of distributor ring is divided into two

distributor spaces

18 and 54 the annular space in connecting tube 28.

Flange connector 14 and 16 inserts in collector flange 13 and 15 with its connecting tube 28.Little sealed pipe fittings 29 has sealed inflow and the outflow path of cold fluid to flow body 20 in the connecting tube 22 of collector flange 13 and 15.

These supporting eyelets 27 in collector flange 13,15 and flange connector 14 and 16 play the effect that these flanges is interfixed and clamp hermetically flow body 20.

Attaching

parts

15,16 and attaching parts 13,14 form in this embodiment identically.Yet only on the inflow direction of this flow of heated fluid, distributor ring 35 being set in attaching

parts

15,16 may be also enough.

Distributor ring 35 plays the effect distributing through being positioned at the flow of heated fluid of connecting through hole 19 importings of this outside, axis, thereby this flow of heated fluid distributes and arrives at equably in all connection opening 19 of corresponding collector flange 13 and 15 through these two

distributor spaces

18 and 54 on the whole circular cross section of flange connector 14 and 16.

In order to produce eddy current in the cold fluid flow flowing into, the flow body 20 almost inserting matchingly in the whole length of this outer tube 11 in this outer tube has the deflection plane 42(Fig. 2 that tip is outside).In the region of individuality pipe 12, flow body 20 is break-through (Fig. 5) in its whole length, wherein for each individual pipe 12 is provided with a penetrated section of longitudinal hole 43 forms that is greater than the external diameter of corresponding individual pipe 12 in internal diameter.

The cold fluid flow importing runs into deflection plane 42, and this deflection plane You Yige center, pointed arches upward 44.Thus, this cold fluid flow radially turns to towards longitudinal hole 43.This cold fluid flow flows through (Fig. 2) from being formed on the neighboring of individual pipe 12 and the ring gap 45 between the corresponding longitudinal hole 43 of flow body 20.

Each individual pipe 12 in longitudinal hole 43 attached troops to a unit, that form a pipe vertical passage, be subject to this cold fluid flow partial discharge around washing away.Like this in the situation that the heat exchange improving has obtained definite cooling effect.

At the other end of flow body 20, by loop type hide flow body 20 cross sections a wall 46 be arranged to and the main body of a flow body 20 spaced apart distance (Fig. 3 and Fig. 5) axially, this wall has a central opening 47 for cold fluid flow is flowed out.By the axial spacing of wall 46, at a columniform cavity 48 of end formation of flow body 20.The ring surface of wall 46 is in a plurality of receiving through-holes 49 break-through on a circumference, the end of the individuality pipe 12 in this tube bank stretches out through receiving through-hole matchingly, to be connected with the annular distributor space 18 in attaching

parts

15,16 by these connection opening that flush 17 of collector component 15.

Flow body 20 forms pipe vertical passages a plurality of inside, that axis extends abreast with its longitudinal hole 43, in these pipe vertical passages, arranges to have these parallel individuality pipes 12.The cold fluid that is guided through flow body 20 can directly contact and around these individual pipes 12 that wash away this flow of heated fluid of guiding, thus effectively cooling flow of heated fluid mobile in individuality pipe 12.

Alternatively, can also guiding cold to this and hot fluid be set with following current or adverse current.

The body of flow shown in Fig. 9 to Figure 13 20 ' a substituting embodiment.' difference of structure is this flow body 20, it on the inflow side for flow of heated fluid, have one by flow body 20 ' outside outstanding, the interval keeper 60 central authorities, mushroom-shaped of end, on the circular ring periphery of this interval keeper, include a plurality of semicircular depressions 61, the end of these individual pipes 12 can be clamped into (Figure 13) in this gap.

On end face, on this interval keeper 60, arrange to have a plurality of intervals projection 62 of extending in the axial direction, at this heat exchanger, be assembled under state together, by these interval projections, form an axial cavity towards collector flange 15, in this cavity, the cold fluid flow flowing out from longitudinal hole 43 is converged and can be guided in the central outflow through hole 21 of attaching

parts

15,16.

Claims

1. an inner heat exchanger, this inner heat exchanger is with a housing in order to guide dividually a kind of fluid stream and a kind of fluid stream that will be cooled of cooling, and these fluids streams import or derivation by a plurality of attaching parts that are arranged in this shell end,

It is characterized in that,

The housing of this inner heat exchanger has a columniform flow body (20),

This flow body (20) has that realize by its cross section, outwards to arch upward on the contrary with the inflow direction of the fluid stream of this cooling deflection plane (42) on the end of an end face,

Near the periphery of this flow body (20), in a circular periphery, arranging has a plurality of individual pipes (12) that form a parallel tube bank, this fluid stream that will be cooled of these individual pipe guiding,

These individual pipes (12) stretch out by a plurality of longitudinal holes this flow body (20), that axis extends abreast (43), in the situation that correspondingly forming an annulus (45), the diameter that these longitudinal holes have is greater than the external diameter of corresponding individual pipe (12).

2. inner heat exchanger as claimed in claim 1, it is characterized in that, these individual pipe (12) a plurality of receiving through-holes (49) by an annular wall (46) on the end of another end face of flow body (20) stretch out, this annular wall has a central opening (47) and is placed in the end of this flow body (20), is spaced from a distance, and wherein the diameter of these receiving through-holes (49) is corresponding to the external diameter of corresponding individual pipe (12).

3. inner heat exchanger as claimed in claim 1, is characterized in that, the housing of this inner heat exchanger has an outer tube (11), and this flow body (20) is arranged in this outer tube ordinatedly.

4. inner heat exchanger as claimed in claim 3, is characterized in that, this outer tube (11) and this flow body (20) be single-piece form.

5. inner heat exchanger as claimed in claim 1, is characterized in that, these individual pipes (12) have a kind of cross section of star.

6. inner heat exchanger as claimed in claim 1, it is characterized in that, these attaching parts (13,14 and 15,16) be in fact two-piece type form, and at this, correspondingly an outside flange connector (14 and 16) and an inner collector flange (13 and 15), consist of, the two mutually inserts ground, is arranged in correspondingly, hermetically the end of this flow body (20).

7. inner heat exchanger as claimed in claim 6, it is characterized in that, this outside flange connector (14 and 16) has a connecting tube (22) and a sealed pipe fittings (29), these two pipe fittings arrange mutually coaxially, wherein upper arrangement of larger-diameter connecting tube (22), there is an inner space by this connecting tube (22) to be divided into the distributor ring (35) in two distributor spaces (18 and 54), wherein this distributor ring (35) has a central opening (50), the diameter of this central opening is greater than the external diameter of sealing pipe fitting (29).

8. inner heat exchanger as claimed in claim 7, it is characterized in that, this collector flange (13 and 15) has the receiver hole (17) for a plurality of perforations of these individual pipes (12) in a side, and has for being provided with a distributor space (18) of connecting tube (22) this distributor ring (35), this flange connector (16) at opposite side.

9. inner heat exchanger as claimed in claim 1, it is characterized in that, this flow body (on 20 '), relative with this deflection plane (42) end face ends, arrange to have a mushroom-shaped, axially extended interval keeper (60), on the periphery of its collar-shaped, arrange to be useful on a plurality of semi-cylindrical canyons (61) of the end that receives these individual pipes (12).

10. inner heat exchanger as claimed in claim 9, is characterized in that, in the upper arrangement of this interval keeper (60), has a plurality of axial outward extending interval projections (62).

11. inner heat exchangers as claimed in claim 1, is characterized in that, arrange to have a plurality of contact pin perforation, that spatial division in managing is become to a plurality of part passages in these individual pipes (12).

12. inner heat exchangers as claimed in claim 11, is characterized in that, these contact pin have the cross arrangement of dividing cross section in this pipe.