CN208442416U - Pipe fitting joint structure, muffler, air-conditioning system and refrigeration system - Google Patents

Abstract

The utility model relates to a kind of pipe fitting joint structures, muffler, air-conditioning system and refrigeration system, including ontology (20) and sleeve (10), ontology is made of stainless steel material, sleeve is made of copper material, ontology includes that port (21) are used in a connection, ontology (20) further includes tubular portion (24) at port (21) position, tubular portion (24) is used to be cooperatively connected with the barrel (11) of sleeve (10), tubular portion (24) and/or barrel have protrusion, make portion interference between inner wall part (240) and barrel (11), part has the structure in gap, and the end of the ontology and the valgus cooperate, valgus is compressed or is abutted with the end of ontology at least portion, the end of valgus and ontology at least portion has gap, this sample prescription Just assembly welding, while the weld seam exposed after use is relatively fewer.

Description

Pipe fitting joint structure, muffler, air-conditioning system and refrigeration system

Technical field

The utility model belongs to refrigeration technology field, relates generally to the connection between stainless steel and copper pipe.

Background technique

The product of refrigeration technology field includes air-conditioning, refrigerator, refrigerator-freezer etc., these general systems will use copper pipe as connection Pipe connects two components, and in order to easy to connect with copper pipe, many components also all mutually should be copper material and be made.Such as liquid reservoir disappears The basic element of character in sound device, four-way valve, solenoid valve, compressor etc. refrigeration system, but these components are likely to work one now Change on a little material selections, such as stainless steel material is selected, it may can use between two kinds of unlike materials in systems Connectivity problem.

System may will relate to how to realize the connection between two kinds of unlike materials such as stainless steel material and copper pipe in this way Fixation problem.

Summary of the invention

The utility model provides a kind of pipe fitting joint structure, and pipe fitting joint structure is convenient to be connect with copper pipe, pipe fitting connection knot Structure passes through after assembling when being welded in furnace, does not need to be carried out by means of other toolings between the component of pipe fitting joint structure It is fixed, and the weld seam exposed when in use is relatively fewer, thus the following technical schemes are provided:

A kind of pipe fitting joint structure, including ontology and sleeve, the ontology and the welded fixed setting of sleeve, the ontology It is made of stainless steel material, the sleeve is made of copper material, and the sleeve includes barrel and valgus, the barrel It is substantially in hollow tubular, the valgus is formed from the barrel outward flanging or bending, and the barrel and valgus are Integral structure, the ontology include at least one connection port, and the ontology further includes tubular portion in the port position, institute Tubular portion is stated for being cooperatively connected with the sleeve, the barrel is at least most of to be located in the tubular portion, the tubulose Portion barrel of its inner wall part with protrusion and/or the sleeve outside wall portions have protrusion, the tubular portion it is interior Portion interference or abutting between the outside wall portions of the barrel of sleeve described in wall portion, the inner wall part of the tubular portion and the set Largely there is gap, the gap becomes the weldering when ontology and the sleeve weld between the outside wall portions of the barrel of cylinder Expect that filling part, the pipe fitting joint structure have solder in the gap filling；The ontology includes end, the end with it is described Valgus cooperation, the valgus are compressed or are abutted, the valgus and institute with the end of the ontology at least portion The end at least portion for stating ontology has gap.

Meanwhile this programme also provides muffler, air-conditioning system and refrigeration system with above-mentioned pipe fitting joint structure.Pass through Stainless steel material be used for connect cooperation port inner wall portion and/or sleeve outer wall be arranged protrusion, make port inner wall portion and It connects and forms part close-fitting between the outside wall portions for cooperation of sleeve and major part has the structure in gap, to help to make Pipe fitting joint structure passes through continuous tunnel furnace after assembling, without being fixed when passing through continuous tunnel furnace by means of other toolings, Process relatively convenient in this way, in addition valgus and the end of the ontology at least portion compression or abut so that it is convenient to Assembly welding, the weld seam exposed after use are also relatively fewer.

Detailed description of the invention

Fig. 1: a kind of structural schematic diagram for pipe fitting joint structure that the utility model provides, Fig. 1 are a kind of offices of muffler Portion's structural schematic diagram；

Fig. 2: the enlarged diagram at the position A of pipe fitting joint structure shown in FIG. 1；

Fig. 3: the A-A of pipe fitting joint structure shown in Fig. 2 to partial schematic sectional view；

Fig. 4: the partial enlargement diagram of pipe fitting joint structure shown in Fig. 3；

The structural schematic diagram of the part of Fig. 5: second pipe fitting joint structure；

Fig. 6: the enlarged diagram at the position B of pipe fitting joint structure shown in fig. 5；

Fig. 7: the left view schematic diagram of one of embodiment of above-mentioned sleeve；

Fig. 8: the structural schematic diagram of the part of the third pipe fitting joint structure；

Fig. 9: the enlarged diagram at the position C of pipe fitting joint structure shown in Fig. 8；

Figure 10: the schematic front view of the another embodiment of above-mentioned sleeve；

The partial enlargement diagram of the sleeve ends region of interest of Figure 11: the four kind of pipe fitting joint structure；

The partial enlargement diagram of the sleeve ends region of interest of Figure 12: the five kind of pipe fitting joint structure；

The partial structural diagram of Figure 13: the six kind of pipe fitting joint structure；

The partial enlargement diagram of pipe fitting joint structure shown in Figure 14: Figure 13；

The partial enlargement structural representation of Figure 15: the seven kind of pipe fitting joint structure.

Symbol description in figure:

10- sleeve；

11- barrel, 111- outside wall portions, 1111- base portion, 1112- raised line；

12,12a, 12b, 12c, 12d, 12e- valgus；

121- protrusion；1211- notch；122- outer wall；124- annular end face；

14- guide part；

15- varus portion, 151- positioning step portion；

20- stainless steel ontology；

The port 21-, 22- stage portion；211- annulus

23, the end 23a, 23b, 23c, 23d-；

231- protrusion；232- outer wall；234- end face portion

24- tubular portion, 240- inner wall part；241- protrusion；243- base portion

30- fill solder portion.

Specific embodiment

Below in conjunction with specific embodiment, technical solution is illustrated.

Pipe fitting joint structure is specifically described by taking a kind of muffler as an example below, Fig. 1-Fig. 4 please be join, Fig. 1 is one kind The structural schematic diagram (interior details are not shown) of muffler, Fig. 2 are the partial enlargement diagram at the position A shown in Fig. 1, and Fig. 3 is The A-A of structure shown in Fig. 2 to partial schematic sectional view, Fig. 4 be Fig. 3 partial enlargement diagram.

As shown, muffler includes ontology 20 and two sleeves 10, ontology 20 passes through spinning side using stainless steel pipe Formula processes to be formed, and is formed at the both ends of ontology 20 by necking and flows into the connection port 21 flowed out with fluid, end for fluid Mouth 21 is less than the middle part 25 of ontology 20, and ontology 20 is provided with stage portion 22 at the inner wall position of port 21, and ontology 20 is in port 21 positions further include the tubular portion 24 for being cooperatively connected with sleeve 10, and one end has ontology at least in the port of two sides The tubular portion 24 being cooperatively connected with sleeve 10.

The sleeve for connection 10 made of copper tubing is including valgus 12 and substantially in the barrel 11 of hollow tubular, outside The opposite exterior lateral sides that portion 12 is located at ontology 20 are turned over, barrel 11 and tubular portion 24 cooperate, and barrel 11 is located substantially on the pipe of ontology In shape portion 24 in other words in at least most of tubular portion 24 positioned at ontology of barrel 11, the sleeve 10 of the present embodiment further includes Varus portion 15, varus portion 15 are that sleeve 10 relatively inner one end is formed or to in-flanges or bending through flange via barrel 11 Or bending is formed, " flange or bending are formed " includes directly processing to be formed or through turning over through the modes such as flange or bending in this specification Machined again after the processing such as side or bending to form, varus portion 15 and barrel 11 form a positioning step portion 151, positioning Positioning when stage portion 151 can be used for being welded to connect with after silencer and connecting copper pipe, valgus 12 are sleeve 10 relatively outer one End is formed via 11 outward flanging of barrel or bending, equally include here outward flanging or bending and it is machined form, The substantially ring-like structure of valgus 12 is protruded by barrel 11 and is arranged.Sleeve 10 further includes guide part 14, the cylinder of the present embodiment Portion 11, valgus 12, varus portion 15 are structure as a whole.

Sleeve 10 is pressed into the connection port 21 of ontology 20, makes the outside wall portions 111 of barrel 11 and the port of ontology 20 The inner wall part 240 of 21 position tubular portions 24 forms the matching relationship of local interference, local gap, thus make sleeve 10 and ontology it Between preliminary fixed form it is relatively stable, can be placed directly in furnace to be brazed in this way can not such as use by others are fixed Tooling is by soldering furnace such as continuous tunnel furnace, to reduce process costs.Between inner wall part and outside wall portions interference assembling after be shown as to The form connect.The end 23 of valgus 12 and ontology can equally form the cooperation of basic compression or local compaction, local gap Relationship.An annulus 211 is formed between the stage portion 22 of ontology 20 and the varus portion 15 of sleeve 10, can be used for being arranged Welding weld-ring, in this way by being welded in furnace such as by the way that weld-ring can be made to be filled into the outer of barrel 11 through melting after continuous tunnel furnace Clearance portion between wall portion 111 and the inner wall part 240 of ontology 20 can also be equally filled into outer to form fill solder portion 30 Turn over the position for having gap between portion 12 and the end 23 of ontology.The outside wall portions 111 of barrel 11 and the tubular portion 24 of ontology 20 Inner wall part 240 between local interference, local gap, radial, axis between the barrel 11 and tubular portion 24 after assembling can be made To position it is relatively fixed reliable.The ontology 20 of the present embodiment includes base portion 243 with the inner wall part 240 for sharing tubular portion 24 With protrusion 241, protrusion 241 slightly protrudes from base portion setting, and protrusion 241 can be multiple strip protrusions as shown in Fig. 2, item The length of shape protrusion is less than the length L with inner wall part cooperation of barrel 11, again smaller than inner wall part and the cooperation of barrel 11 Length L, and two back gauge cooperation positions have certain axial distance, i.e. strip protrusion is arranged in 240 medium position of inner wall part Strip protrusion is not to extend to end 23 to have a certain distance apart from end 23 in other words in other words, and in addition strip is prominent Playing the annulus 211 that distance places weld-ring also has certain distance, and the both ends of such strip protrusion can have fill solder, thus Guarantee welding quality.Strip protrusion height substantially outstanding can be between 0.05-0.15mm.With the axis of ontology in this specification It is axial to direction definition.Since protrusion is to make local interference between the two and make to form local mistake between two mating surfaces Be full of, the structure of local gap, thus in this specification to the shape in the section of protrusion with no restriction, as long as achieving the goal i.e. It can.

In addition the outside wall portions 111 that can equally make barrel 11 in this way in sleeve outer wall portion and this also can be set in protrusion The matching relationship of local interference, local gap is formed between the inner wall part 240 of the 21 position tubular portion 24 of port of body 20.

Second of embodiment of pipe fitting joint structure is described below, Fig. 5-Fig. 7 please be join, this is second of pipe fitting joint structure Stainless steel and copper pipe interconnecting piece part structural schematic diagram, Fig. 6 is putting for the position B of pipe fitting joint structure shown in fig. 5 Big schematic diagram, Fig. 7 are the left view schematic diagrams of one of them possible embodiment of above-mentioned sleeve.Pipe fitting joint structure includes this Body 20 and sleeve 10, ontology 20 use the processed formation of stainless steel pipe, and ontology 20 includes connection port 21, and ontology is being held The inner wall position of mouth 21 is provided with stage portion 22, and ontology 20 further includes for being cooperatively connected with sleeve 10 at 21 position of port Tubular portion 24.The sleeve for connection 10 made of copper tubing include valgus 12a with substantially be in hollow tubular barrel 11, Sleeve 10 is pressed into the connection port 21 of ontology 2, makes the inner wall of the outside wall portions 111 of barrel 11 and the tubular portion 24 of ontology 20 Portion 240 forms the matching relationship of local interference, local gap, to make to be formed after being pressed between sleeve 10 and ontology preliminary fixed Relationship, can be placed directly in furnace be brazed such as can not by others it is fixed with toolings by continuous tunnel furnace, to drop Low process costs.The end 23 of valgus 12a and ontology forms the matching relationship of local compaction, local gap.In ontology 20 An annulus 211 is formed between stage portion 22 and relatively inner the other end of sleeve 10, for welding weldering to be arranged Ring, in this way by being welded in furnace such as by the way that the welded fusing of weld-ring can be made to be filled into the outside wall portions of barrel 11 after continuous tunnel furnace Clearance portion between 111 and the inner wall part 240 of ontology 20 can also equally be filled into valgus to form fill solder portion The position for having gap between 12a and the end 23 of ontology forms fill solder portion.The end 23 of valgus 12a and ontology is formed The matching relationship of local compaction, local gap, specifically, mating surface of the sleeve in valgus 12a towards end 23 are relatively outer Position be provided with protrusion 121, such as Fig. 7, protrusion 121 can be the structure of non-close, i.e., can in the part of protrusion 121 Notch 1211 is arranged, in addition it is also possible to closing form, the rising height h of protrusion 121 can control in 0.05mm- Between 0.20mm, it is relatively fewer that the setting of protrusion can be such that the weld seam between valgus and end exposes.Other structures It is referred to above example.

In addition the protrusion cooperated between valgus and end also can be set in ontology side, as Fig. 8-Fig. 9, Fig. 8 are The structural schematic diagram of the part of the third pipe fitting joint structure, Fig. 9 are the amplification at the position C of pipe fitting joint structure shown in Fig. 8 Schematic diagram.The difference of the present embodiment and second embodiment is the position of the protrusion setting of valgus and body end cooperation not Together, the end face of the end 23a of ontology 20 towards the valgus 12 of sleeve is provided with protrusion.Other structures are referred to Face second embodiment.

A kind of embodiment for the sleeve that above-described embodiment may be used, such as Figure 10 is described below.Sleeve 10 includes turning up Portion 12b, varus portion (not shown), with substantially be in hollow tubular barrel 11, valgus 12, varus portion and barrel 11 It is structure as a whole.Valgus 12b and varus portion are respectively arranged at the two sides of barrel 11, and it is inside that varus portion can be sleeve 10 Flange or bending are formed, include here through flange or bending and it is machined form, valgus 12b be sleeve 10 it is turned-out Side or bending are formed, equally include here through flange or bending and it is machined form, the substantially ring-like knot of valgus 12b Structure can be used for cooperating with the end end face of ontology, and the outside wall portions 111 of barrel 11 include base portion 1111 and raised line 1112, raised line 1112 protrude setting from base portion 1111, and raised line 1112 is relatively shorter the length of the outside wall portions 111 of barrel, raised line 1112 Length can be the one third of the length of the outside wall portions 111 of barrel between 2/3rds, and the two sides of raised line 1112 have There is base portion, can guarantee welding quality in this way, in addition raised line can also be replaced with multiple salient points, the protrusions such as raised line or salient point Rising height h can control between 0.05mm-0.2mm, and the cross sectional shape of raised line or salient point is here with no restriction.Sleeve 10 is also It is provided with guide part 14.

Other two kinds of embodiments are described below, if Figure 11, Figure 12, Figure 11 are the sleeve ends of the 4th kind of pipe fitting joint structure The partial enlargement diagram of region of interest, Figure 12 are the partial enlargement of the sleeve ends region of interest of the 5th kind of pipe fitting joint structure Schematic diagram, the outer diameter of the valgus of ordinary circumstance lower sleeve are greater than the outer diameter of the end of ontology, but sometimes if the end of ontology If, can be using structure shown in Figure 12 in the case that thickness is thicker.The difference of the two embodiments is turning up for sleeve The structure of matching part is different between portion and the end of ontology, first is that the valgus of sleeve and the end of ontology and ontology The outer diameter size of end is slightly different, and the position of protrusion setting is in both the valgus of outer diameter sleeve and the end of ontology The middle relatively small one of outer diameter, and protrusion is arranged in relatively outer side position, embodiment as shown in figure 11 in protrusion The 231 end 23b that ontology is arranged in are arranged close to its outer wall 232 near outside left, the outer rim of the end 23b of ontology It is slightly less than the outer rim of the outer wall of the valgus 12 of sleeve, structure if round is the outer diameter of the outer wall of the end 23b of ontology It is slightly less than the outer diameter of the outer wall 122 of the valgus 12 of sleeve, the protrusion 231 and sleeve of the end 23b setting of such ontology Valgus can compress, and realize the structure of local compaction between the end of ontology and the valgus of sleeve, local gap.Figure 12 institute The relatively close outside left of valgus 12C of sleeve, the outer diameter of the end 23 of ontology is arranged in protrusion 121 in the embodiment shown Slightly larger than the outer diameter of the valgus 12C of sleeve, the protrusion 121 of the setting of the valgus 12C of such sleeve and the end of ontology 23 end face can compress, and realize the structure of local compaction between the end of ontology and the valgus of sleeve, local gap.Here Equally with no restriction to the shape in the section of protrusion.

Other two kinds of embodiments are described below, such as the knot for the part that Figure 13-Figure 14, Figure 13 are the 6th kind of pipe fitting joint structure Structure schematic diagram, Figure 14 are the partial enlargement diagram of pipe fitting joint structure shown in Figure 13.The difference of this embodiment is to cover The structure of matching part is different between the valgus of cylinder and the end of ontology, both the valgus of sleeve and the end of ontology The matching part of the end face area one of them matched is slightly in that indent setting is obliquely installed in other words, the end of ontology as shown in the figure The position of the valgus of portion and sleeve cooperation is not the planar structure of stricti jurise, and the end of ontology and the valgus of sleeve are matched The section for closing position is presented the structure of wedge like, the end of ontology the valgus of the relatively inner point position M and sleeve it Between distance H be greater than between valgus of the relatively outer point position N with sleeve at a distance from, or even near outside At least partly the valgus of the end of Position Ontology and sleeve can compress setting, make to realize the end of ontology and turning up for sleeve The structure of local compaction between portion, local gap.The end face for cooperating with the valgus 12d of sleeve of the end 23d of ontology The distance between portion 234 and the annular end face 124 of the valgus of sleeve gradually reduce from inside to outside, are said differently, and distance is originally The distance between the end of the ontology of the 0 relative close position (M) in center of the end of body and the valgus of sleeve are greater than 0 point of the center of end apart from ontology relatively far away between the end of ontology and the valgus of sleeve of position (N) away from From in this way, the weld seam between the end of ontology and the valgus of sleeve exposes opposite after the completion of pipe fitting joint structure welding It is less.The processing relatively convenient of this scheme, as long as slightly adjustment can be realized when processing the end of ontology.In addition, can also Be ontology end and sleeve valgus cooperation position in planar structure, that face of the valgus cooperation of sleeve is non-planar Structure, in this way processing are also the same very convenient, and the structure of tooling or mold can be such as adjusted when processing valgus, is made whole The outside of a valgus is more opposed, inwardly directed equally to may be implemented above-mentioned requirements such as Figure 15 to ontology direction, sleeve The annular end face 124 of the annular end face that both ends 23 of valgus 12e and ontology match wherein valgus 12e is slightly in indent Side presents to ontology direction and is slightly slanted setting, the generally planar structure in the end of ontology from inside to outside in other words for setting, and covers The valgus of cylinder is not the planar structure of stricti jurise for the annular end face 124 of cooperation, the end of ontology and sleeve it is outer The structure of wedge like is presented in the section for turning over portion's matching part, and similarly, the end of ontology is in the relatively inner point position M and set At a distance from the distance between the valgus of cylinder H is greater than between the valgus in the relatively outer point position N with sleeve, or even most Setting can be compressed with the valgus of sleeve close to the end of at least partly Position Ontology in outside to abut in other words, to realize The structure of local compaction between the end of ontology and the valgus of sleeve, local gap.The end 23 of ontology be used for and sleeve Valgus 12e cooperation end face portion 234 and sleeve the distance between the annular end face 124 of valgus from inside to outside gradually It reduces, is said differently, the end of ontology when the 0 relative close position in center of the end apart from ontology and sleeve The distance between valgus be greater than 0 point of the center of end apart from ontology relatively far away from position when ontology end and set One of the position of the distance between the valgus of cylinder, i.e. both valgus of the end of ontology and sleeve cooperation is not stringent The planar structure of meaning, but it is radial present from inside to outside it is gradually slightly convex outward, it is radial in other words slightly concave from outside to inside, so i.e. The transition portion for making to turn up between edge and barrel at right angles as having transition angle, remain on can make the end of ontology with The position that the valgus of sleeve cooperates between the two has the position of local compaction setting, especially proximate to external position i.e. with Distance is relatively small between the end of position ontology and the valgus of sleeve that afterwards when in use may be exposed, i.e., this position can Solder surface product that can be exposed is smaller.

It, can be first in the ring-type of the connection port 21 of ontology 20 in the assembling process of pipe fitting joint structure such as muffler Cricoid solder (such as weld-ring) is preset in space, then is pressed into sleeve for connection 10, the structure between stage portion 22 and the inner end of sleeve At the receiving portion for accommodating default solder.Sub-assembly is placed in furnace soldering equipment and is heated to technological temperature appropriate, such as 1000 DEG C of left sides The right side, solder fusing and due to siphon (capillary) effect can be filled into ontology inner wall part and sleeve barrel outside wall portions 111 Between the position with gap, and have part that can be filled into the portion with gap between the end of ontology and the valgus of sleeve Position, thus realize being welded and fixed between the ontology of stainless steel material and copper sleeve, since sleeve is copper pipe, thus and its He welds more convenient between copper pipe, that is, solves the connectivity problem between stainless steel and copper pipe, the substitution of material can be made to hold Easily realize.

In the above-described embodiments, several salient points also can be set on the outer wall of the barrel of sleeve as protrusion, equally The matching relationship for constituting local interference, local gap between outer wall and inner wall can be played, not only ease of assembly, but also hold welding Easily realize.

In the above-described embodiments, sleeve can be separately positioned on the inlet end and outlet end of components or flow path, answer It should be it is appreciated that according to actual needs, the inlet end or outlet end of flow path can be positioned only at, this also belongs to this technology side The protection scope of case.Explanation can be used for muffler above, in addition can be used for liquid reservoir, reversal valve, solenoid valve, cut-off The components of the system replaced with stainless steel material may be needed after valve, check valve, electric expansion valve, compressor etc. or are System, can be used for refrigeration system, such as can be used for air-conditioning system, refrigerator, refrigerator-freezer, and air-conditioning system or other refrigeration systems include one A first component, the first component have pipe fitting joint structure recited above, and specifically, one of them of the first component is used for The ontology of connection is made of stainless steel material, can make ontology as described in above-described embodiment in this way, cooperates sleeve described above, pipe Sleeve one end of part connection structure and ontology are welded to connect, and refrigeration system additionally includes the copper pipe with sleeve connection, sleeve with The fusion temperature of solder used in the external welded connection of copper pipe, the sleeve of pipe fitting joint structure and copper pipe welding is for example Substantially can at 850 DEG C ± 50 DEG C or so, lower than the fusion temperature of the sleeve and the stainless steel welded solder used, 1000 DEG C or so or 1030 DEG C or so, welding temperature subsequent in this way is lower than original welding temperature, will not be to original welding Position has an impact, i.e., conveniently realizes the connection between stainless steel and copper pipe, keeps selection of the system on components more square Just.

The above is only preferably to illustrate several embodiments that relevant technical solution is enumerated, it is noted that with Upper embodiment is merely to illustrate the technical solution of the utility model and not limits, for example, to "front", "rear", "left", "right", "upper", "lower" "inner", "outside" isotropy define, and for those skilled in the art, are not departing from skill Under the premise of art principle, several improvements and modifications can also be made, can be such as combined with each other, be modified or equivalent replacement, And the technical solution and its improvement of all spirit and scope for not departing from this programme, all these improvements and modifications also should be regarded as this The protection scope of utility model.

Claims (9)

1. a kind of pipe fitting joint structure, including ontology (20) and sleeve (10), the ontology (20) and sleeve (10) are welded solid Fixed setting, it is characterised in that: the ontology is made of stainless steel material, and the sleeve is made of copper material, the sleeve It (10) include barrel (11) and valgus, the barrel (11) is substantially in hollow tubular, and the valgus is from the cylinder Portion's (11) outward flanging or bending are formed, and the barrel (11) and valgus are structure as a whole, and the ontology includes at least one Port (21) are used in a connection, and the ontology (20) further includes tubular portion (24), the tubular portion at the port (21) position (24) for being cooperatively connected with the sleeve (10), the barrel (11) is at least most of to be located in the tubular portion (24), The tubular portion (24) has the outside wall portions (111) of the barrel (11) of protrusion and/or the sleeve in its inner wall part (240) With protrusion, between the outside wall portions (111) of the barrel (11) of the inner wall part (240) and the sleeve of the tubular portion (24) Portion interference or abutting, the outside wall portions of the barrel (11) of the inner wall part (240) and the sleeve of the tubular portion (24) (111) largely there is gap, the gap becomes the fill solder portion when ontology and the sleeve weld, described between Pipe fitting joint structure has solder in the gap filling；The ontology includes end, and the end and the valgus cooperate, institute It states valgus to compress or abut with the end of the ontology at least portion, the end of the valgus and the ontology is extremely Rare portion has gap.

2. pipe fitting joint structure as described in claim 1, which is characterized in that the substantially ring-like structure of valgus, it is described Valgus is located at the opposite exterior lateral sides of the ontology (20), and the valgus outwardly protrudes setting by the barrel (11), described The end of ontology has the valgus of protrusion and/or the sleeve to the end of the ontology to the valgus direction of the sleeve Portion has protrusion, and the protrusion (121) is the cyclic structure of relative closure；Define the ontology end and the sleeve Valgus between gap be the second gap, the pipe fitting joint structure is at least partially filled with weldering second gap Material.

3. pipe fitting joint structure as described in claim 1, which is characterized in that the substantially ring-like structure of valgus, it is described Valgus is located at the opposite exterior lateral sides of the ontology (20), and the valgus outwardly protrudes setting by the barrel (11), described The end of ontology has the valgus of protrusion and/or the sleeve to the end of the ontology to the valgus direction of the sleeve Portion has protrusion, and the protrusion (121) is non-closed cyclic structure, and the protrusion has notch；Define described Gap between the end of body and the valgus of the sleeve is the second gap, and the pipe fitting joint structure is in second gap Be at least partially filled with solder.

4. pipe fitting joint structure a method according to any one of claims 1-3, which is characterized in that the ontology in the port position, The inner wall part of the tubular portion cooperated with the barrel (11) is provided with stage portion (22), the sleeve is relatively close End at the stage portion has at a distance from axial direction between the stage portion, the end of the stage portion and the sleeve it Between constitute annulus as receiving portion, described accommodation section can be used in placing the weldering when ontology and the sleeve weld Ring；The outside wall portions of the barrel (11) of the sleeve include the protrusion, and the protrusion includes a plurality of strip protrusion, described The length of strip protrusion is less than the length (L) with inner wall part cooperation of the barrel (11), the length of the strip protrusion Degree is less than the length (L) of the cooperation of the inner wall part and the barrel (11), and the two back gauges cooperation of the strip protrusion There is certain axial distance in position.

5. pipe fitting joint structure as claimed in claim 4, which is characterized in that the sleeve further includes varus portion, the varus Portion is located at the relatively inner one end of the sleeve, and the varus portion is formed via the barrel to in-flanges or bending, described interior It turns over portion and the barrel forms positioning step portion, the barrel, valgus, varus portion are structure as a whole；The sleeve exists End at the stage portion of the relatively close ontology further includes guide part, has axis between the guide part and the stage portion To distance, constitute described accommodation section between the stage portion and the guide part, described accommodation section is for placing the ontology With the weld-ring when sleeve weld.

6. pipe fitting joint structure a method according to any one of claims 1-3, which is characterized in that the sleeve further includes varus portion, institute It stating varus portion and is located at the relatively inner one end of the sleeve, the varus portion is formed via the barrel to in-flanges or bending, The varus portion and the barrel form positioning step portion, and the barrel, valgus, varus portion are structure as a whole；It is described End of the sleeve at the stage portion of the relatively close ontology further includes guide part, between the guide part and the stage portion With axial distance, receiving portion is constituted between the stage portion and the guide part, described accommodation section is for placing described Weld-ring when body and the sleeve weld.

7. a kind of muffler, it is characterised in that: the muffler includes that sleeve is added with using stainless steel pipe by spinning mode The ontology that work is formed, the sleeve are formed by copper pipe processing, the connection structure of the ontology and sleeve such as the claims 1-6 Any pipe fitting joint structure.

8. a kind of air-conditioning system, it is characterised in that: the air-conditioning system includes the first component, and the first component includes as above-mentioned Any pipe fitting joint structure of claim 1-6, sleeve one end of the pipe fitting joint structure and ontology welding connect It connects, the air-conditioning system further includes the copper pipe with the sleeve connection, the sleeve and the welded connection of the copper pipe, the pipe The fusion temperature of solder used in the sleeve of part connection structure and copper pipe welding is welded lower than the sleeve and the stainless steel Connect the fusion temperature of solder used.

9. a kind of refrigeration system, it is characterised in that: including the first component, the first component includes such as the claims 1-6 Any pipe fitting joint structure, sleeve one end of the pipe fitting joint structure and the ontology are welded to connect, the refrigeration System further includes the copper pipe with the sleeve connection, the sleeve and the welded connection of the copper pipe, the pipe fitting joint structure Sleeve and the used solder of copper pipe welding fusion temperature lower than the sleeve and the stainless steel welded weldering used The fusion temperature of material.