CN201069022Y - Pipe joint for air-conditioning indoor and outer machine - Google Patents
Pipe joint for air-conditioning indoor and outer machine Download PDFInfo
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- CN201069022Y CN201069022Y CNU200720154038XU CN200720154038U CN201069022Y CN 201069022 Y CN201069022 Y CN 201069022Y CN U200720154038X U CNU200720154038X U CN U200720154038XU CN 200720154038 U CN200720154038 U CN 200720154038U CN 201069022 Y CN201069022 Y CN 201069022Y
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Abstract
The utility model relates to a connection pipe used for indoor and outdoor units of an air conditioner, which is composed of an aluminum pipe and a copper pipe welded on both ends of the aluminum pipe. The connection pipe is characterized in that a tapered welded surface is provided at the welded joint position of the copper pipe; the aluminum pipe at the welded joint has wavy lines on the outer wall; and the nominal diameter of the outer wall of the aluminum pipe at the welded joint is identical to the outer diameter of the copper pipe. The outer wall of the copper-aluminum joint of the utility model has wavy lines, the maximal diameter of the outer wall is slightly larger than the outer diameter of the copper pipe, but the nominal diameter of the outer wall is identical to the outer diameter of the copper pipe, thereby ensuring the convenience of post-processing. The joint is almost identical in effect to the copper-aluminum joint which has a copper pipe and an aluminum pipe with the identical diameter. Meanwhile, the design can greatly reduce the processing complexity, improve the product quality and reliability and reduce the rejection rate.
Description
Technical field
The utility model relates to air-conditioning technical field, is exactly the improvement that is used for the adapter of air-conditioning indoor and outdoor machine in more detail.
Background technique
In recent years, the copper valency was constantly raising up, and the copper pipe wall thickness that designs in refrigeration product is more and more thinner.Along with the exhaustion day by day of global copper ore resource, simple attenuate copper material wall thickness can not be offset skyrocketing of copper valency, and aluminium becomes the problem that refrigeration industry has to face for copper material.Fact proved that two ends are to be the preferred option of the replacement scheme refrigeration industry aluminium of aluminum pipe for copper material in the middle of the copper pipe.
Refrigeration agent is the operation material that carries out refrigeration cycle in refrigeration plant, in the circulating pipe system of refrigeration agent as year cold medium, refrigeration is relevant with the quantity of refrigeration agent, refrigeration agent recycles in system, the seepage of any trace, all will cause the internal system refrigeration agent to scatter and disappear, and influence the refrigeration of product, finally will make refrigeration product forfeiture refrigeration performance.So the compactness of assurance pipe-line system, especially copper aluminum pipe welded joint is very important.
The relevant patented technology that is used for the adapter of air-conditioning indoor and outdoor machine, comprise patent 1: refrigeration system with Cu-Al combination piping and its preparation method, number of patent application 200510042495.5 elaborates the face shaping of the design of the copper aluminum pipe modular construction of pipe joint, copper Al pipe butt welding principle, copper aluminum pipe welded joint; Patent 2: a kind of copper-aluminium combined pipeline for refrigerating system, the patent No. 200510043347.5 has been carried out detailed elaboration to the making method of the welded joint inside diameter plug-in type copper aluminum pipe identical with the aluminum pipe inside diameter.
Find that in actual production when copper-aluminium tube joint was carried out the plug-in type resistance welding, two electrodes of resistance welding machine are clamping copper pipe and aluminum pipe respectively by above-mentioned two kinds of inventions, the electrode of clamping copper pipe drives copper pipe and inserts in the aluminum pipe to be welded.For the external diameter that makes welded joint is identical with the aluminum pipe external diameter, the groove diameter of clamping aluminum pipe need be identical with the aluminum pipe external diameter in the electrode, but just can't clamp aluminum pipe like this, and aluminum pipe comes off easily.In the practice, for guaranteeing that electrode can clamp aluminum pipe, usually all be more a little bit smaller with the groove minimum diameter design of clamping aluminum pipe in the electrode than aluminum pipe external diameter, therefore the external diameter of this part is less than aluminum pipe to be welded after causing welding, especially when thin wall copper aluminum pipe welds, the groove diameter design of too small clamping aluminum pipe can make the joint internal diameter after the welding become ellipse, and quality standard reduces, and problem is more outstanding.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of adapter that is used for the air-conditioning indoor and outdoor machine.
For the adapter that is used for the air-conditioning indoor and outdoor machine of the present utility model, the problems referred to above are to solve like this: a kind of adapter that is used for the air-conditioning indoor and outdoor machine, constitute by aluminum pipe, the copper pipe that is welded on the aluminum pipe two ends, there is the taper face of weld at the welded joint position of copper pipe, the aluminum pipe outer wall at welded joint place has ripple glaze, and the nominal diameter of the aluminum pipe outer wall at welded joint place is identical with the copper pipe external diameter.
During production, be provided with mosaic block in the welding part of electrode, have groove in the mosaic block, be carved with the waveform lines on the welding part of groove, the nominal diameter of the groove of this band waveform lines is identical with the aluminum pipe external diameter.The pilot pressure welding machine moves copper pipe and inserts in the aluminum pipe, in the grafting process, utilize the taper face of weld of copper pipe that the oxide layer on the aluminum pipe inwall is ground away, simultaneously to electrifying electrodes, under the effect of resistance heat, aluminum pipe melts rapidly, and the aluminium liquid of fusing is filled out in the ripple glaze of mosaic block groove, thereby can keep the aluminum pipe external diameter of joint not shrink, after the taper face of weld of copper pipe enters aluminum pipe fully, disconnect welding power source, form the copper aluminum pipe welded joint that an outer wall has ripple glaze.Same method is finished copper pipe, the Al pipe butt welding of the other end.The copper-aluminium joint that is welded into like this, the nominal diameter of the aluminum pipe outer wall at welded joint place and copper pipe, aluminum pipe external diameter are identical.
The beneficial effects of the utility model are as follows:
1, the aluminum pipe outer wall at the welded joint place of air conditioner connecting pipe described in the utility model has the waveform lines, though its maximum diameter is slightly larger than the copper pipe external diameter, but its nominal diameter is identical with the copper pipe external diameter, has so just guaranteed the convenience of following process, as giving whole connection pipe box lagging.The effect of its effect and copper pipe, the identical copper-aluminium joint of aluminum pipe external diameter is very nearly the same.Simultaneously, this design greatly reduces the complexity of processing, has improved quality of product and reliability, has reduced reject rate.The waveform lines is arranged on the groove on the mosaic block, and its nominal diameter is identical with aluminum pipe, and minimum diameter is more smaller than aluminum pipe.Owing to increased the waveform lines, and minimum diameter is more smaller than aluminum pipe external diameter, therefore can clamp aluminum pipe, make its difficult drop-off, can guarantee that the external diameter of copper-aluminium tube joint welding part is identical with aluminum pipe simultaneously.
2, the external diameter of the taper face of weld port of copper pipe front end is slightly less than the aluminum pipe internal diameter, is convenient to insert aluminum pipe.
When welding, in copper pipe, insert a welding plug, the adapter that can produce the air-conditioning indoor and outdoor machine of no eutectic structure in advance.Fixed electrode, mosaic block overflow from outside limits aluminium liquid in welding process, form external pressure; Welding plug opposing copper pipe distortion in the copper pipe, exert pressure to the copper and aluminium welding seam internally, form internal pressure, under multidirectional high pressure effect, the copper aluminium eutectic structure that forms behind the high temperature is extruded from welded seam area fully, form direct chemical bond between copper pipe taper face of weld and the aluminum pipe inwall and be connected, do not have eutectic structure in the weld seam, thereby can improve welding quality greatly.The mentioned eutectic structure of this specification is meant the eutectic alloy that copper aluminum metallization compound and aluminium form under the high temperature.
In order to increase the service life, can to carry out copper plating treatment on the surface of the adapter of air conditioner indoor and outdoor machine, thereby improve the anti-corrosion capability of aluminum pipe and weld seam.
In order to optimize welding effect, make thinner copper-aluminium combined pipeline be suitable for the adapter of air conditioner indoor and outdoor machine, the welding conical surface of above-mentioned copper pipe can be made polyline shaped.Described broken line diameter should be slightly larger than the aluminum pipe internal diameter.Adopt the polyline shaped face of weld, not only reduced the resistance when when welding thin-walled copper, aluminum pipe, inserting copper pipe, help preventing the copper pipe deformation instability, and formed two sections fusion weld seams, improve welding fusion area and quality.
Description of drawings
The welding schematic representation of the adapter of Fig. 1 air conditioner indoor and outdoor machine.
The local enlarged diagram of Fig. 2 mosaic block groove
The structure of the adapter of Fig. 3 air conditioner indoor and outdoor machine
Fig. 4 has the copper pipe of polyline shaped conical surface
Description of symbols among the figure:
Embodiment
Specific embodiment 1:
With reference to Fig. 1, choose external diameter of pipe identical copper pipe 2 and aluminum pipe 12 carries out preliminary working, the welding part that is about to copper tube end is processed into welding conical surface 6.Put into a root bead in advance in the inside of copper pipe 2 and connect plug 1, and the external form of welding plug 1 and the taper face of weld of copper pipe 2 are matched, the traveling electrode 3 that copper pipe 2 places internal pressure type resistor pressure welding machine to incite somebody to action is middle; Aluminum pipe 12 ports need not processed, and keep wall thickness and diameter original state, and aluminum pipe places on internal pressure type resistor pressure welding machine general's the fixed electrode 5, mill in advance to process wave lines 7 on the groove of mosaic block 4.As shown in Figure 3, the nominal diameter D2 of groove is identical with the aluminum pipe external diameter, and the minimum diameter D1 of groove is slightly less than the aluminum pipe external diameter, and maximum dimension D 3 is slightly larger than the aluminum pipe external diameter.
By internal pressure type resistor pressure welding machine the copper pipe on traveling electrode 3 and the electrode thereof 2 is moved in the insertion aluminum pipe 12.Hard copper pipe 2 welding conical surfaces 3 are ground away the oxide layer on soft aluminum pipe 12 inwalls, simultaneously to traveling electrode 3, fixed electrode 5 energisings, under the effect of resistance heat, aluminum pipe 12 melts rapidly, the aluminium liquid of fusing is filled out in the waveform lines 7 of fixed electrode 5, because the effect of welding plug 1 keeps the external diameter of aluminum pipe 12 not shrink, after entering into aluminum pipe 12 fully, the taper face of weld of copper pipe 2 disconnects welding power source, promptly finish the copper Al pipe butt welding of an end.Finish the copper Al pipe butt welding of the other end then as method.Finish the preparation that the air-conditioning indoor and outdoor machine is taken over.
The adapter of the air-conditioning indoor and outdoor machine of producing, the aluminum tube surfaces at welded joint place has the waveform concave convex texture, is called for short ripple glaze.The nominal diameter of the aluminum pipe outer wall at welded joint place is identical with the copper pipe external diameter.
Specific embodiment 2:
With reference to Fig. 4, the welding conical surface 6 of above-mentioned copper pipe 2 also can be polyline shaped face of weld 10, the diameter d at broken line place should be slightly larger than aluminum pipe 12 internal diameters, can reduce the resistance when when welding thin-walled copper, aluminum pipe, inserting copper pipe, help preventing the copper pipe deformation instability, and formed two sections fusion weld seams, and improve welding fusion area and quality.
The utility model describes with reference to drawings and Examples; but protection domain is not limited thereto; in the utility model technical scope, have those of ordinary skill and can pass through simple conversion, and obtain the same technique effect of the utility model, equally in this novel protection domain.
Claims (3)
1. be used for the adapter of air-conditioning indoor and outdoor machine, constitute by aluminum pipe, the copper pipe that is welded on the aluminum pipe two ends, there is the taper face of weld at the welded joint position that it is characterized in that copper pipe, and the aluminum pipe outer wall at welded joint place has ripple glaze, and the nominal diameter of the aluminum pipe outer wall at welded joint place is identical with the copper pipe external diameter.
2. the adapter that is used for the air-conditioning indoor and outdoor machine as claimed in claim 1 is characterized in that in the outside of aluminum pipe and welded joint copper layer being arranged.
3. the adapter that is used for the air-conditioning indoor and outdoor machine as claimed in claim 1 or 2 is characterized in that described taper face of weld is the polyline shaped face of weld.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720154038XU CN201069022Y (en) | 2007-06-04 | 2007-06-04 | Pipe joint for air-conditioning indoor and outer machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720154038XU CN201069022Y (en) | 2007-06-04 | 2007-06-04 | Pipe joint for air-conditioning indoor and outer machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201069022Y true CN201069022Y (en) | 2008-06-04 |
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ID=39490408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720154038XU Expired - Fee Related CN201069022Y (en) | 2007-06-04 | 2007-06-04 | Pipe joint for air-conditioning indoor and outer machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201069022Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148544A (en) * | 2013-03-26 | 2013-06-12 | 东莞市金瑞五金制品有限公司 | Connecting pipe for air conditioner |
| WO2014008645A1 (en) * | 2012-07-12 | 2014-01-16 | Zhao Yue | Copper-aluminium connecting pipe structure and manufacturing method |
| CN110735974A (en) * | 2018-07-20 | 2020-01-31 | 新昌县四通机电有限公司 | pipe fitting connecting structure, manufacturing method thereof, liquid storage device and refrigerating system |
-
2007
- 2007-06-04 CN CNU200720154038XU patent/CN201069022Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014008645A1 (en) * | 2012-07-12 | 2014-01-16 | Zhao Yue | Copper-aluminium connecting pipe structure and manufacturing method |
| CN103148544A (en) * | 2013-03-26 | 2013-06-12 | 东莞市金瑞五金制品有限公司 | Connecting pipe for air conditioner |
| CN103148544B (en) * | 2013-03-26 | 2015-10-28 | 东莞市金瑞五金制品有限公司 | A kind of air conditioner connecting pipe |
| CN110735974A (en) * | 2018-07-20 | 2020-01-31 | 新昌县四通机电有限公司 | pipe fitting connecting structure, manufacturing method thereof, liquid storage device and refrigerating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080604 Termination date: 20130604 |