CN1042006C

CN1042006C - Heat exchanger

Info

Publication number: CN1042006C
Application number: CN93106072A
Authority: CN
Inventors: 细谷和树; 门浩隆
Original assignee: Sanden Corp
Current assignee: Sanden Corp
Priority date: 1993-05-17
Filing date: 1993-05-17
Publication date: 1999-02-10
Anticipated expiration: 2013-05-17
Also published as: CN1095326A

Abstract

The present invention relates to a heat exchanger which comprises collecting pipes, flat pipes which are extended among the collecting pipes, and fin devices which are extended among the flat pipes, wherein the collecting pipes comprises a plurality of holes on one side of the collecting pipes for receiving the flat pipes, and the corresponding one side of the collecting pipes are at least provided with a notch; a partition board in inserted into the notch. When the collecting pipes are formed, a pair of protrusion parts are formed on each notch. After the partition board is inserted into the collecting pipes, the protrusion parts are bent until contacting with the partition board, and thereby, the partition board is firmly fixed in the collecting pipes.

Description

Heat exchanger

The present invention relates to a kind of heat exchanger, refer to that especially a kind of assembling is used for the method for heat exchanger of evaporimeter or condenser and the structure of this heat exchanger.

Fig. 1 shows the cooling cycle system of a routine, for example, is used for the cooling cycle system of automotive air-conditioning system.The circulatory system 1 comprises compressor 10, condenser 20, and liquid reservoir 30, expansion gear 40 and evaporimeter 50, these parts are connected the outlet of parts successively with pipe fitting 60 with the inlet of next parts.The outlet of evaporimeter 50 is connected on the inlet of compressor by pipe fitting 60, thereby forms loop.Pipe fitting 60 makes this circulatory system seal for the connection of each parts of the circulatory system 1.

During the circulatory system 1 work, refrigerant gas is discharged from the outlet of evaporimeter 50, and the inlet of inflow compressor 10 also is compressed, and drains into condenser 20 then.Refrigerant compressed gas is dispersed into heat in the external fluid that flows through condenser 20 in condenser 20 and goes, and for example is dispersed in the atmospheric air, and is condensed into liquid condition.Then, liquid refrigerant flow to liquid reservoir 30 and is stored in the inside.Cold-producing medium in the liquid reservoir 30 flow to expansion gear 40, heating power expansion valve for example, and the pressure of liquid refrigerant reduces in expansion gear 40.The liquid refrigerant of reduction pressure flows through evaporimeter 50 and by the liquid that flows through evaporimeter, for example, atmospheric air absorbs heat and vaporizes.Then, the cold-producing medium of gaseous state is got back to the inlet of compressor 10 from evaporimeter 50, recycles so that further compress and pass through the circulatory system 1.

Fig. 2 and Fig. 3 show and be disclosed in the pipe 21 that Japanese Utility Model discloses a kind of prior art general flat among the clear 63-49193, and these pipe fittings have the opening that oval cross section and a plurality of permission refrigerant fluid flow through.A plurality of ripple fin devices 22 are arranged between the adjacent flat tube 21.

Circular header

23 and 24 is provided with also perpendicular to flat tube 21 can have for example a kind of sandwich construction.A plurality of notches that penetrate 25 are arranged on the header 23 and 24.Flat tube 21 is fixedly attached on

header

23 and 24 and is arranged in notch 25, and a plurality of openings of flat tube 21 are connected with the hollow interior of

header

23 and 24.

Header 23 has our bottom of opening of our top of opening and, and they are respectively with fixing and be tightly connected there inlet tube joint 23a and outlet pipe connection 23b sealing.The inlet tube joint is connected in the outlet of compressor 10.Outlet pipe connection is connected on the inlet of storage liquid 30.Polylith dividing plate 23c is arranged on regularly in the header 23 it is divided into upper chamber 231, intermediate cavity 232 and lower chamber 233.Header 24 has the top of a sealing and the bottom of a sealing.A dividing plate 24A is arranged in the header 24 regularly, is positioned at the medium position of its length approximately, thus the lower chamber 242 that header 24 is divided into upper chamber 241 and separates with upper chamber 241.The position of dividing plate 24a is lower than the position of upper baffle plate 23c, is higher than the position of lower partition 23c.

During work, refrigerant compressed gas flows into the upper chamber 231 of header 23 by compressor 10 by inlet tube joint 23a, and portion gas is distributed flow through each flat tube 21 of being located at above the upper spacer 23c.Then, the gas in the flat tube 21 flows into the top of upper chamber 241.Then, the cold-producing medium in the top of upper chamber 241 flows into the bottom of upper chamber 241 downwards and is distributed, and a part is flow through be located at below the upper spacer 23c position and is located at each flat tube 21 above the dividing plate 24a position.Then, these gases are flowed into the top of the intermediate cavity 232 of header 23 by flat tube 21.Cold-producing medium in intermediate cavity 232 tops flows into its underpart downwards, and is assigned with, and a part is flow through be positioned at dividing plate 24a bottom and each the root flat tube 21 that is positioned at above the lower clapboard 23c.Then, these gases flow into the top of the lower chamber 242 of header 24.Cold-producing medium in lower chamber 242 tops flows into its underpart downwards and is assigned with, and a part is flow through be located at each the root flat tube below the lower partition 23c position and flows into the lower chamber 233 of header 23.

When the refrigerant gas sequential flow was crossed flat tube 21, the heat in the refrigerant gas exchanged with the atmospheric air that flows through corrugated fin device 22.Because refrigerant gas is dispersed into heat in the air in the outside and goes, so when it is condensed into liquid condition during by flat tube 21.The liquid refrigerant of the condensation in lower chamber 233 flows out through outlet pipe connection 23b from that and enters liquid reservoir 30.

As shown in Figure 3, notch 26 with notch 25 relative formation is arranged on the header 23.This notch 26 is between two adjacent notches 25.The utmost point spare 27 that formation is positioned at the dividing plate of header 23 comprises integrally formed minor diameter half-round 271 and major diameter half-round 272, and these two semi-circular portion link to each other at their string face.The diameter of half-round 271 is substantially equal to the internal diameter of header 23, and the diameter of half-round 272 is substantially equal to the external diameter of header 23.Plate 27 is arranged in the notch 26, the half-round 271 and the inner surface of header 23 are closely cooperated, and the set-up mode of half-round 272 is that the end 262 of its end 272a and groove 26 is closely cooperated.Therefore, after the combination, plate 27 can not move towards the inside of header 23 and be substantially flush with the outer surface of header 23.

In more detail, after the assembling, the heat exchanger that is fixed together by nipper is placed in the brazing filler metal stove.These anchor clamps can remain on each parts of heat exchanger on their corresponding positions each parts before for good and all fixing in the brazing filler metal process in theory.Though plate 27 is moved by the inside that

end

272a, 262 connection effect are prevented from a header 23, fail to stop plate 27 to skid off from notch 26 after putting in.In addition, there is the gap between the periphery 261 of the end face of plate 27 and bottom surface and notch 26.Therefore, plate 27 may be the position of various inclinations with respect to the longitudinal axis of header 23.

See also Fig. 4 and Fig. 5, the inboard of header 23 is made by aluminum metal 23d, and its outside is made by alusil alloy, is plated on the circumference of aluminum metal 23d formation.The fusing point of alusil alloy is lower than the fusing point of aluminum metal 23d.So alusil alloy is connected together plate 27 and header 23 fibres.

Because fixing after plate 27 is placed in the notch 26, so though just the insertion position be correct, the position of plate 27 is easy to by a little vibration or impact, for example, changes in heat exchanger is delivered to the process of brazing filler metal stove.When heating in heat exchanger is placed on the brazing filler metal stove, any locational error of plate 27 all will produce nonvolatil defective on the structure of heat exchanger.For example,

end

272a and 262 may not exclusively flush.In this case, plate 27 brazing filler metals are on header 23 time, make between the inner surface of half-round 271 and header and produce the gap, make some cold-producing mediums walk around many passages by this heat exchanger thus.On the other hand, plate 27 may make a little less than the brazing filler metal too between notch 26 and the plate 27 in angle of notch 26 medium dips, influences a cover service life of this heat exchanger.In this case, near the slit that is easy to split, the header place of plate 27, can flow into atmosphere by this slit cold-producing medium.

Therefore, the purpose of this invention is to provide the dividing plate in a kind of heat exchanger header, this dividing plate can firmly fix in place in the brazing filler metal stove before the brazing filler metal.

In order to realize above-mentioned and some other purpose, provide a kind of method that is used for assembled heat interchanger header median septum here according to the present invention.The cylindrical shape of this header has the connecting hole of many receiving heat-exchanger pipes on it.In addition, a relative side that is preferably in connecting hole have at least one its in the notch of plant dividing plate.This method comprises the following steps: at least one notch of cutting on the circumference of header, and the length of this notch between its both ends is less than the diameter of dividing plate; Then, turned up in two ends of notch, notch is enlarged simultaneously; Then dividing plate is inserted in the header by the notch that enlarges; At last, the protuberance that turns up of each end of notch is pressed against on the exposed surface part of dividing plate, skids off towards the outside of header to prevent this dividing plate.

In addition, this preferred embodiment relates to a kind of heat converter structure, and this structure comprises a columniform header and a plurality of connecting hole that is used to hold heat exchange tube.Header comprises that also at least one is used to insert the notch of dividing plate.Dividing plate inserts after the header, and a pair of protuberance that turns up that forms at the notch two ends is connected dividing plate at least and exposes on the part of circumference.Therefore, this dividing plate has been prevented to shift out from header effectively.

Other purpose of the present invention, character and aspect are by being understandable below in conjunction with accompanying drawing to the detailed description of preferred embodiment of the present invention.

Fig. 1 is the schematic block diagram according to the cooling cycle system of prior art.

Fig. 2 is the side view that shows the condenser in the cooling cycle system shown in Figure 1.

Fig. 3 is the exploded view of some parts of the condenser shown in Fig. 2.

Fig. 4 is that wherein flat tube and fin device are omitted along the partial sectional view of 4-4 line intercepting among Fig. 2.

Fig. 5 is that wherein flat tube and fin device are omitted along the partial sectional view of 5-5 line intercepting among Fig. 2.

Fig. 6 is the perspective view of condenser in the preferred embodiment.

Fig. 7 A shows the partial sectional view that carries out cutting step according to the method in this preferred embodiment.

Fig. 7 B and Fig. 7 C show the partial sectional view that carries out the notch expansion step according to the method in this preferred embodiment.

Fig. 8 shows the perspective view that carries out the dividing plate inserting step according to the method for this preferred embodiment.

Fig. 9 A shows the partial sectional view that carries out inserting step according to the method for this preferred embodiment.

Fig. 9 B and Fig. 9 C show according to the turn up partial sectional view of protuberance bending step of the method for this preferred embodiment.

Figure 10 is the cutaway view that shows the header of membrane support in the collection collector according to this preferred embodiment.

Referring to each accompanying drawing, Fig. 6-10 shows the method for the heat exchanger in the assembling preferred embodiment and the structure of this heat exchanger.In these figure, identical label is used for representing to be presented at the corresponding part of prior art accompanying drawing.Therefore, the complete explanation of those parts has been omitted.

Referring to Fig. 6, shown the condenser in the preferred embodiment among the figure especially.Condenser 200 comprises many flat tubes 21 and many corrugated fin devices 22 of alternately arranging to form heat exchange area 200a.Flat tube 21 is preferably made of aluminum and have a multi-channel structure.In more detail, flat tube 21 comprises the next door of many vertical settings, and therefore, flat tube 21 has many parallel flowing all.The contact surface that this structure has increased when cold-producing medium flows through flat tube 21 is long-pending.These flat tubes 21 are arranged in the notch 25 corresponding in

header

130 and 140.

Header

130 and 140 is cylindrical shape preferably, and their inboard is preferably made by aluminum metal, and the outside is preferably made by alusil alloy, and the fusing point of alusil alloy is lower than the fusing point of aluminum metal.Dividing plate 71 is preferably disposed on the upper position in the header 140, and dividing plate 72 is preferably disposed on the lower position in the header 130.Go up the open top end that pipe close 15 is located at header 130 for one, a following pipe close 16 is located at the lower openings of header 130.Dividing plate 71, last pipe close 150 and following pipe close 16 are divided into 130a of fluid chamber and following fluid cavity 130b with header 130.Inlet tube 230 stretches into header 130 and will go up another parts in the 130a of fluid chamber and the cooling cycle system, and is continuous as compressor.Two

chamber

130a and 130b are spaced apart from each other.

Header 140 comprises a dividing plate 72 of being located in it, and it preferably is positioned at header 140 and is lower than the set position of header 130 internal partitions 71.The open top end of header 140 and bottom open end are respectively equipped with pipe close 17 and following pipe close 18.Dividing plate 72, last pipe close 7 and following pipe close 8 are divided into 140a of fluid chamber and the following 140b of fluid chamber with header 140, and these two chambers are spaced apart from each other.Outlet 240 stretches into header 140 and will descend other parts of 140b of fluid chamber and kind of refrigeration cycle, links to each other as liquid reservoir.

During work, the compression refrigerant gas that is come by compressor flows through inlet tube 230 and enters the last 130a of fluid chamber of header 130 and be assigned with, and a part of gas is flow through be arranged on each flat tube 21 above dividing plate 71 positions.The top of the 140a of fluid chamber on the cold-producing medium that flows in flat tube 21 flows into.Then, the cold-producing medium on upper fluid, chamber 140a top flow to the bottom of the 140a of fluid chamber and is assigned with, and a part is flow through be located at below dividing plate 71 positions and is located at each flat tube 21 above dividing plate 72 positions.Then, cold-producing medium flows into the top of the following 130b of fluid chamber of header 130.Cold-producing medium in the top of the following 130b of fluid chamber flows into its underpart downwards and is assigned with, and a part is flow through be located at each flat tube 21 below dividing plate 72 positions.At last, cold-producing medium flows into the following 140b of fluid chamber of header 140.When refrigerant gas flow through flat tube 21 successively, the atmospheric air that the heat in the refrigerant gas is flow through corrugated fin device 22 was taken away.Because refrigerant gas looses heat to outside air, so when it is condensed into liquid condition during by flat tube 21.The liquid refrigerant of condensation is flowing through outlet 240 and is flowing into liquid reservoir among the 140b of fluid chamber down.

Fig. 7 A shows manufacturing heat exchanger, for example the otch step in the method for the header of condenser.At first, header 130 is placed in the semi-circular groove 81 that forms on the mould 8 of a press.Mould 8 comprises a pair of blade section (not shown), and they are respectively formed on the relative inner end on semi-circular groove 81 tops, face mutually.Then, the drift 91 that is arranged on above the groove 81 cuts out a groove 131 on a part of circumference of header 130.The end 131a of this groove 131 and the length between the 131b are less than the diameter of the dividing plate 70 that shows among Fig. 8-10.

After the otch step, this method continues groove is carried out expansion step, shown in Fig. 7 B and Fig. 7 C.In this step, shown in Fig. 7 B, metal pattern 92 with U-shaped shape be placed on groove 131 above.The width W of metal pattern 92 preferably is substantially equal to or is slightly smaller than the internal diameter of header 130.And the radian of the metal pattern 92 roughly radian with groove 81 is identical.Then, shown in Fig. 7 C, when metal pattern 92 stretches into groove 131, the pair of end portions 131a of groove 131,131b is cut and is stripped from by the circular surface of a pair of blade section along metal pattern 92.Metal pattern 92 preferably stretches into groove 131, touches up to the bottom of metal pattern 92 till the rounded internal surface of header 130.

Preferably referring to Fig. 8 and Fig. 9 A, the end 131a of groove 131,

extension

131c, 131d that the extended formation of 131b is stretched out towards header 130 outsides.And, form the U type part 132 of holding dividing plate in the inboard of header 130.The inside that is preferably in pipe forms a groove B3 by metal pattern 92, is used to hold the medial margin of dividing plate 70.The size of opening 131e, or more particularly, the diameter of length between protuberance 131c, the 131d and dividing plate 70 is roughly the same, or be a bit larger tham the dividing plate diameter.

After the notch expansion step, manufacture process proceeds to the dividing plate inserting step, shown in Fig. 8 and Fig. 9 A.Dividing plate 70 preferably has round-shapedly, is inserted in the U-shaped part 132 by opening 131e, and the inner of dividing plate 70 cooperates with groove 133.The diameter of dividing plate 70 preferably equates with the width of U type part 132 or less than this width.And the diameter of dividing plate 70 makes the inboard of header 130 be divided into a plurality of chambers more preferably greater than the internal diameter of header 130.In addition, because that dividing plate 70 has is round-shaped, so it does not relate to orientation when inserting.

After the dividing plate inserting step, this method proceeds to the bending step, shown in Fig. 9 B and 9C.At first, shown in Fig. 9 B, instrument 92 be placed on opening 131e above.More particularly, instrument 93 is placed on the last circular surface and the protuberance 131c of dividing plate 70, above the 131d.The width of instrument 93 is slightly smaller than the diameter of the semi-circular groove 81 that forms on the mould 8, but is a bit larger tham the width of opening 131e.The bottom 93a of instrument 93 has circular shape.Then, instrument is fallen towards opening 131c, and gradually with

protuberance

131c, 131d is towards dividing plate 70 bendings.In addition, as protuberance 131c, when 131d was bent, dividing plate 70 little by little entered in the groove 133.

Therefore, shown in Fig. 9 c, the protuberance 131c, the 131d that are bent by instrument 93 are engaged on the circumference of dividing plate 70.So dividing plate 70 is highlighted the 131c of portion, 131d and is securely fixed on the header 130.

Figure 10 shows by said method and is installed in dividing plate 70 in the header 130, because the bending of

protuberance

131c, 131d has prevented the outer side shifting of dividing plate 70 towards header 130.So, both made header 130 be impacted or vibrate, dividing plate 70 also is highlighted the 131c of portion, 131d and is securely fixed on its position.And the inboard of header 130 is divided into a plurality of chambers effectively.

After the assembling, each parts of this heat exchanger are fixed together with nipper, deliver to then in the brazing filler metal stove and heat.Usually, when heat exchanger was moved into the brazing filler metal stove, some shock and vibration meetings made dividing plate shift out from their fixed position.But, since the last circumferential surface of this preferred embodiment median septum 70 be highlighted the 131c of portion, 131d push down also supported, so dividing plate 70 can not shift out from its fixed position.Therefore, when brazing filler metal, dividing plate 70 is cut apart header 130 inboards effectively, does not have fluid can walk around many flow channels or overflows atmosphere.

The present invention here is illustrated in conjunction with preferred embodiment, and still, this embodiment is only tailor-made to be that an example does not provide constraints to the present invention.Should be understood that,, in not breaking away from the of the present invention spiritual scope that limits by appended claims, can make radio-opaque distal marking and change type for those those skilled in the art that.

Claims

1. method of making the header of heat exchanger has a plurality of connecting holes that are used for the receiving heat-exchanger pipe and at least one and is used at the turn back dividing plate of thermal medium of described header on the described header, described method comprises the following steps:

Notch of processing on described header;

It is characterized in that,

Outwardly directed fixture of processing on described notch;

At least a portion of described dividing plate is inserted in the described notch;

And the described fixture that bends inwards is so that connect at least a portion of described dividing plate securely.

2. the method for claim 1 is characterized in that described dividing plate coats with a kind of brazing filler metal material.

3. the method for claim 1 is characterized in that its shape of described dividing plate is roughly circle.

4. the method for claim 1 is characterized in that described dividing plate is approximately perpendicular to the axis location of described header.

5. the method for claim 1 is characterized in that the described notch on the described header is formed by a drift.

6. the method for claim 1 is characterized in that the step of described fixture also comprises the step that described notch is enlarged.

7. method as claimed in claim 6 is characterized in that described notch is extended by inserting a mould within it.

8. method as claimed in claim 7 is characterized in that the two ends of described notch are to turning up when described mould inserts in the described notch.

9. method as claimed in claim 8 is characterized in that described bending step comprises with an instrument inward at both ends bending is made the step of described end cover at least a portion of described header.

10. method as claimed in claim 6 when it is characterized in that described notch is extended, forms a pair of protuberance radially.

11. method as claimed in claim 10 is characterized in that described protuberance radially forms described fixture.

12. the method for claim 1 is characterized in that it also comprises an instrument near described header localization step, described instrument has one roughly corresponding to the working surface of the outer surface of described header.

13. method as claimed in claim 12 is characterized in that it also comprises the step that instrument moves towards described header, till described fixture covers at least a portion at described dividing plate.

14. a cooling cycle system, its feature comprises:

One compressor;

A condenser that is positioned at described compressor back;

A liquid reservoir that is positioned at described condenser back;

An expansion element that is positioned at described condenser back;

And evaporimeter that is positioned at described expansion valve back;

Described condenser also comprises:

One first header;

Second header that separates with described first header;

A heat exchange area that between described header, forms;

A notch that in described header, forms at least one;

A dividing plate that inserts in the described groove 12;

And stretch out the fixture that is used for described dividing plate is securely fixed in described notch from described notch.

15. cooling cycle system as claimed in claim 14 is characterized in that it also is included in the groove that the described notch opposite side on the described header forms, at least a portion of described dividing plate is arranged in the described groove.

16. cooling cycle system as claimed in claim 14 is characterized in that described notch also comprises a pair of relative end, described fixture comprises the corresponding ledge that opposed end is stretched out from this.

17. a header that is used for heat exchanger comprises:

The notch that at least one forms on the described surface of described header;

A dividing plate that inserts in described at least one notch;

It is characterized in that,

Stretch out the fixture that is used for described dividing plate is securely fixed in described at least one notch from described notch.

18. header as claimed in claim 17 is characterized in that it also comprises a groove that forms at the opposite side of described at least one notch of header, at least a portion of described dividing plate is arranged in this groove.

19. header as claimed in claim 17 is characterized in that described at least one notch also comprises a pair of relative end, described fixture comprises the corresponding protuberance that stretches out from described opposite end.

20. header as claimed in claim 17 is characterized in that it also comprises a plurality of notches that form on described header, inserts a dividing plate in each notch, described dividing plate uses the fixture that stretches out from described notch to be fixed in the described notch.