CN106270915B - A kind of application method of air conditioning liquid reservoir welding protection device - Google Patents
A kind of application method of air conditioning liquid reservoir welding protection device Download PDFInfo
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- CN106270915B CN106270915B CN201610793997.XA CN201610793997A CN106270915B CN 106270915 B CN106270915 B CN 106270915B CN 201610793997 A CN201610793997 A CN 201610793997A CN 106270915 B CN106270915 B CN 106270915B
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- 238000003466 welding Methods 0.000 title claims abstract description 182
- 239000007788 liquid Substances 0.000 title claims abstract description 91
- 238000004378 air conditioning Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000009423 ventilation Methods 0.000 claims abstract description 132
- 229910000679 solder Inorganic materials 0.000 claims abstract description 57
- 238000003860 storage Methods 0.000 claims abstract description 55
- 239000007789 gas Substances 0.000 claims description 139
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 39
- 229910052757 nitrogen Inorganic materials 0.000 claims description 20
- 238000009826 distribution Methods 0.000 claims description 16
- 239000000470 constituent Substances 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 12
- 229910052787 antimony Inorganic materials 0.000 claims description 11
- 229910052748 manganese Inorganic materials 0.000 claims description 11
- 229910052759 nickel Inorganic materials 0.000 claims description 11
- 229910052717 sulfur Inorganic materials 0.000 claims description 11
- 229910052725 zinc Inorganic materials 0.000 claims description 11
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 claims description 9
- 230000007547 defect Effects 0.000 claims description 8
- 229910052718 tin Inorganic materials 0.000 claims description 8
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 5
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 5
- 239000000356 contaminant Substances 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 239000003345 natural gas Substances 0.000 claims description 5
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 5
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 5
- 238000011017 operating method Methods 0.000 claims description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 claims 2
- MFUZXFWVYOMQBM-UHFFFAOYSA-N dimethyl 2,3-diacetylbutanedioate Chemical compound COC(=O)C(C(C)=O)C(C(C)=O)C(=O)OC MFUZXFWVYOMQBM-UHFFFAOYSA-N 0.000 claims 1
- 238000001035 drying Methods 0.000 claims 1
- 239000010949 copper Substances 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 10
- 229910052802 copper Inorganic materials 0.000 abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000010301 surface-oxidation reaction Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000012467 final product Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 18
- 229910000831 Steel Inorganic materials 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 238000005219 brazing Methods 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 9
- 238000007254 oxidation reaction Methods 0.000 description 9
- 239000011148 porous material Substances 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 8
- 238000005266 casting Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 5
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 4
- JTEDVYBZBROSJT-UHFFFAOYSA-N indole-3-butyric acid Chemical compound C1=CC=C2C(CCCC(=O)O)=CNC2=C1 JTEDVYBZBROSJT-UHFFFAOYSA-N 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 210000000080 chela (arthropods) Anatomy 0.000 description 3
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005491 wire drawing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- MUXOBHXGJLMRAB-UHFFFAOYSA-N Dimethyl succinate Chemical compound COC(=O)CCC(=O)OC MUXOBHXGJLMRAB-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K5/00—Gas flame welding
- B23K5/02—Seam welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K5/00—Gas flame welding
- B23K5/003—Gas flame welding the welding zone being shielded against the influence of the surrounding atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K5/00—Gas flame welding
- B23K5/22—Auxiliary equipment, e.g. backings, guides
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of air conditioning liquid reservoir welding protection device and its application methods, belong to welding technology field.The air conditioning liquid reservoir welding protection device includes outer ventilation block and interior ventilation block, and outer ventilation block is rectangular block shape structure, is equipped with lateral gas hole and longitudinal gas hole, and connect hole by outer ventilation and connect with air source；Interior ventilation block is equipped with interior gas hole, and connects hole by interior ventilation and connect with air source.The method of the present invention leads to protection gas by interior ventilation block into cylinder in the welding process, has welded to stand and has protected gas to welding position copper by outer ventilation block, air is avoided to contact weld seam.When being welded the invention can avoid liquid storage device, welding position surface oxidation enhances solder design intensity, improves final product quality, reduces production cost.
Description
Technical field
The invention belongs to welding technology field, more specifically to a kind of air conditioning liquid reservoir welding protection device and its
Application method.
Background technology
Air conditioning liquid reservoir, for storing refrigerant, main function includes realizing gas-liquid separation, removes foreign matter, is also returned
The control of oil mass.The material of traditional liquid storage device used into escape pipe is red copper, into the Welder between escape pipe and cylinder
Skill mostly uses flame welding, furnace brazing, ratio-frequency welding, and welding material is respectively silver solder, strong solder, phosphor bronze solder；Using
The product of above-mentioned technique processing, material cost and welding cost are higher, and working environment is poor.
In air conditioning liquid reservoir, escape pipe is divided into straight tube and bend pipe two parts inside and outside cylinder, it passes through welding and cylinder
Body is linked together.Since straight-tube portion is in the inside of cylinder, it is not contacted with extraneous air, thus is not easy to get rusty, at this
There is any advantage in part using copper pipe unlike use steel pipe, and copper is than just price is higher by several times, thus reality under same volume
Select the obvious manufacturing cost of copper pipe higher in matter, many producers are to reduce product material cost now, change outlet tube material
For steel material.But due to using gas brazing often to cause the weld part of two weld metal pieces between steelwork and steelwork
Position surface oxidation, can black after oxidation, when postwelding paints, be obstructed by a thick layer oxidation film between surface film and steel pipe,
Cause paint film to lose the binding force with steel pipe, seriously affect the anti-rust action of paint film, thus postwelding need by follow-up cleaning and
The processes such as polishing, which are handled, carrys out scale removal, not only considerably increases welding cost, and cleaning process is needed using a large amount of
Chemicals, would seriously pollute the environment, and polishing process be easy harmful effect is caused to product appearance, after influencing welding
Product quality.
In addition, cylinder and escape pipe connection place, cylinder is the thicker structure of whole wall thickness, and thickness of steel pipe is relatively thin, causes
The two is dramatically different in the thermal capacity of welding portion, and there are the setting of welding condition difficulty, the junction of cylinder and steel pipe is being welded
It is easy to loosen when connecing, causes welding portion shape not ideal enough, and because of the collective effect of above-mentioned factor, cause weldquality poor,
Influence using effect.
Invention content
1, it to solve the problems, such as
For existing air conditioning liquid reservoir using the gas brazing mode of steelwork and steelwork welding, welding position can be caused
Surface oxidation, welding reliably and the problem of weldquality difference, a kind of present invention air conditioning liquid reservoir welding protection device of offer and its
Application method is assisted using welding fixture during liquid storage device gas brazing, is passed through protective gas and is protected to weld seam, kept away
No-welding portion faces aoxidize, meanwhile, optimize welding method, improves weldquality.
2, technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of air conditioning liquid reservoir welding protection device, including outer ventilation block and interior ventilation block, it is characterised in that：Described is outer
Ventilation block is rectangular block shape structure, and left side is internally provided with groove, and the escape pipe of groove and liquid storage device matches, outer ventilation block bottom
The left end in face is equipped with boss, and 2 lateral gas holes are symmetrically equipped in the boss of groove both sides, and lateral gas hole is connected to boss
Right side；Both sides above the outer ventilation block further groove are symmetrically set there are two gas distribution channel, and lateral gas hole passed through
Stomata is connected to gas distribution channel；The right side of boss is symmetrical about the both sides of groove along its length in the outer ventilation block
There are longitudinal gas hole, longitudinal gas hole upper end to be connect with gas distribution channel, lower end is connected to the bottom surface of outer ventilation block；Described is outer logical
The upper surface of air parcel is equipped with outer ventilation and connects hole, and outer ventilation connects hole connection gas distribution channel；The upper surface of the interior ventilation block is equipped with
The centre of the round platform to match with the air inlet pipe of liquid storage device, round platform is equipped with interior gas hole；The side of the interior ventilation block is equipped with
Interior ventilation connects hole, and interior ventilation connects hole and is connected to interior gas hole.
Further, the upper surface of the outer ventilation block is equipped with location hole, and the bottom surface of interior ventilation block is equipped with mounting hole, fixed
Position hole and mounting hole are threaded hole.
Further, it is connected by transitional pore between two gas distribution channels, outer ventilation connects hole connection transitional pore,
And it is connected to two gas distribution channels by transitional pore.
Further, it is connected with groove by middle part gas hole among the transitional pore.
Further, the lower end of longitudinal gas hole is bent to groove side.
Further, longitudinal gas hole is equipped with 3 pairs along outer ventilation block length direction, and respectively first longitudinal direction is blown
Hole, second longitudinal direction gas hole and third longitudinal direction gas hole, the distance between 2 first longitudinal direction gas holes are equal to 2 second longitudinal directions
The distance of gas hole and the distance for being more than 2 third longitudinal direction gas holes.
A kind of application method of air conditioning liquid reservoir welding protection device, operating procedure are as follows：
The defects of 1. ultrasonic cleaning is carried out to liquid storage device to be welded, surface and oil contaminant is removed, gets rusty, and it is dry；
2. interior ventilation block is fixed, and the air inlet pipe end of liquid storage device is inserted on the round platform of interior ventilation block, interior ventilation connects hole
Connection protection gas air source；
3. it in the escape pipe insertion tube body of liquid storage device and will position, meanwhile, outer ventilation block is stuck in escape pipe by groove
On, and fixed outer block of ventilating, outer ventilation connect hole and connect protection gas air source；
4. flame welding gun is adjusted in place, interior ventilation block connects air source, and protective gas is full of inside liquid storage device, control pressure
For 0.03-0.06MPa, the welding position of cylinder and escape pipe is preheated, and access solder, starts to weld；
5. welding terminates moment, outer ventilation block is connected into air source immediately, welding position surrounding is full of protective gas, and controls
Air pressure is 0.05-0.10MPa, excludes air, welding position is avoided to aoxidize；
6. liquid storage device is waited for be cooled to room temperature, stop internally ventilation block and outer ventilation block supply protection gas；
7. removing the liquid storage device welded, that is, complete welding operation.
Further, the step is 4. middle is welded using automatic turntable solderer, and welding machine has 12 stations, passes through
Dispenser realizes that continuous automatic welding, gage of wire are φ 1.2mm；Burning gases are natural gas and oxygen when welding, protect gas
Body is nitrogen, gas pressure 0.05-0.08MPa, oxygen pressure 0.3-0.6MPa, nitrogen pressure 0.03-
0.06MPa；Welded gaps between escape pipe and cylinder are 0.1-0.2mm, and welding section length of fit is 5-8mm.
Further, welding uses no-clean scaling powder, and constituent and mass fraction are：3~6 parts of rosin, acetyl
1~4 part of dimethyl succinate, 0.5~1 part of indolebutyric acid, 0.2~0.6 part of methylbenzotriazole, 75~90 parts of isopropanol.
Further, welding use constituent and the mass fraction of solder for：Cu be 57%~60%, Zn be 38%~
40%, Sb are 0.4%~1%, Mn 0.1%, Ni be 0.3%~0.5%, Sn be 0.1%~1.5%, S be 0.1%~
0.4%.
3, advantageous effect
Compared with the prior art, beneficial effects of the present invention are：
(1) air conditioning liquid reservoir welding protection device of the present invention has outer ventilation block and interior ventilation block, existing liquid storage device welding
When because in liquid storage device welding position temperature it is very high, be surrounded by oxygen and welding protection gas, so can be by oxidizing blackening, this hair
It is bright that ventilation protection is carried out to the inside of liquid storage device using interior ventilation block in the welding process, avoid the above problem；Using outer ventilation
Block is passed through protection gas after the completion of welding and is protected to welding position, avoids face of weld ingress of air that oxidizing blackening occurs
The problem of, and then the pickling process after welding is avoided, it avoids and pollutes the environment, ensure product quality, the outer ventilation
Block can comprehensively lead to protection by the reasonable Arrangement of lateral gas hole and longitudinal gas hole to liquid storage device welding position surrounding
Gas avoids air contact weld position, the device from overcoming the skill that steelwork uses the soldering of flame non-oxidation with steelwork completely
Art problem, expand gas brazing uses field；
(2) air conditioning liquid reservoir welding protection device of the present invention, outer ventilation block are installed by location hole and are fixed, and interior ventilation block is logical
It crosses mounting hole installation to fix, liquid storage device is stable, accurate can limit and fix, welding is facilitated to operate；
(3) lower end of air conditioning liquid reservoir welding protection device of the present invention, longitudinal gas hole is bent to groove side, makes protection
Gas blowout gas direction is directed at welding position, preferably carries out welding position protection；
(4) air conditioning liquid reservoir welding protection device of the present invention, longitudinal gas hole are equipped with 3 pairs along outer ventilation block length direction,
Along the circumferentially distributed of escape pipe, welding position is covered comprehensively, avoids air from being contacted with welding position completely；
(5) application method of air conditioning liquid reservoir welding protection device of the present invention, welding process by welding protection device into
Row protection avoids liquid storage device with escape pipe welding portion by oxidizing blackening, and interior ventilation block venting pressure is 0.03-0.06MPa,
Less than this pressure, protecting effect is not had, is more than this pressure, can enter since protection gas is ventilated from lower to upper, in weld seam yet and protect
Gas is protected, influences the flowing of solder down, and the flowing of excessive pressure protection gas can take away the heat of workpiece in welding process, make work
Part welding temperature is inadequate, influences infiltration and the intensity of weld seam, and welding protection effect and welding heat utilize in this pressure limit
Reach best；Welding is completed moment, and outer ventilation block venting pressure is 0.05-0.10MPa, poor less than this pressure protection effect, greatly
In this range, when just welding is completed, solder does not solidify yet, and weld seam can be blown recess by excessive protection gas, influence solder intensity and
Beauty, on the other hand, pressure is excessive before protection gas has cooling effect, solder not to solidify, makes solder quickly cooling, weld seam can be caused to hold
It splits etc. bad, influences weld strength.
(6) application method of air conditioning liquid reservoir welding protection device of the present invention, is welded using automatic turntable solderer,
And welding machine has 12 stations, and continuous automatic welding is realized by dispenser, not only high degree of automation, efficient, but also weld
Connect that the used time is short, and each station is carried out at the same time, prevent welding process China and foreign countries ventilation block logical protection gas when, it is preceding with the extension of weld seam
Face has solidified weld seam to be occurred with the case where air catalytic oxidation, if this occurs, even if follow-up outer ventilation block is passed through protection
The oxidation of gas unavoidable welding position；Meanwhile it is 0.1-0.2mm to control the welded gaps between escape pipe and cylinder,
Welding section length of fit is 5-8mm, and is in welding condition：Gas pressure 0.05-0.08MPa, oxygen pressure 0.3-
0.6MPa is carried out under the welding surroundings of nitrogen pressure 0.03-0.06MPa, and solder can uniformly be full of welded gaps, not have
Excess solder flows into cylinder, and weld seam is tight and will not cause weld blowhole, and weld strength is high.
(7) application method of air conditioning liquid reservoir welding protection device of the present invention, it is clear using exempting to increase the mobility of solder
Scaling powder is washed, is halogen-free, has no irritating odor, is free from environmental pollution, it is good using the scaling powder adhesion of the formula, it can reinforce welding
Connect ability, solder joint is full, bright, secured, preferably reduce be soldered material surface tension, assist heat transfer, prevent oxidisability,
Improve speed of welding and cleaning metal, and it does not corrode base material, methylbenzotriazole enhances product stability, and storage is super
2 years are spent, it is still with good performance.
(8) application method of air conditioning liquid reservoir welding protection device of the present invention, the cylinder to adapt to thicker go out with relatively thin
Welding between tracheae is optimized the constituent and solder of solder, enhances its wetability and diffusion, compared to common
Strong solder wetability improve 2% or so, the diffusion rate of solder and base material improves 0.3 times or so, to effectively solve
The problem of thermal capacity of welding position is different when certainly cylinder is welded from escape pipe, and welding condition is difficult to set weld firm, weld seam
For shape than more consistent, weldquality is high.
Description of the drawings
Fig. 1 is the front view of air conditioning liquid reservoir welding protection device of the present invention China and foreign countries ventilation block；
Fig. 2 is the vertical view of air conditioning liquid reservoir welding protection device of the present invention China and foreign countries ventilation block；
Fig. 3 is the left view of air conditioning liquid reservoir welding protection device of the present invention China and foreign countries ventilation block；
Fig. 4 is the front sectional view of air conditioning liquid reservoir welding protection device of the present invention China and foreign countries ventilation block；
Fig. 5 is the sectional view of A-A in Fig. 4；
Fig. 6 is the sectional view of B-B in Fig. 5；
Fig. 7 is the sectional view of C-C in Fig. 6；
Fig. 8 is the sectional view of D-D in Fig. 6；
Fig. 9 is the sectional view of interior ventilation block in air conditioning liquid reservoir welding protection device of the present invention；
Figure 10 is the use state diagram of air conditioning liquid reservoir welding protection device of the present invention.
Label in figure indicates as follows respectively：
1, outer ventilation block；
101, groove；102, boss；103, lateral gas hole；104, gas distribution channel；105, air passing hole；106, first longitudinal direction
Gas hole；107, second longitudinal direction gas hole；108, third longitudinal direction gas hole；109, outer ventilation connects hole；110, transitional pore；111, in
Portion's gas hole；112, location hole；
2, interior ventilation block；
201, round platform；202, interior gas hole；203, interior ventilation connects hole；204, mounting hole.
Specific implementation mode
The present invention is further described below with reference to specific embodiments and the drawings.
Embodiment 1
As shown in Figures 1 to 9, the present embodiment provides a kind of air conditioning liquid reservoir welding protection devices, including outer 1 He of ventilation block
Interior ventilation block 2；Wherein, the outer ventilation block 1 is rectangular block shape structure, and left side is internally provided with groove 101, groove 101 with
The escape pipe of liquid storage device matches, and the left end of outer ventilation block 1 bottom surface is equipped with boss 102, right in the boss 102 of 101 both sides of groove
Ground is claimed to be equipped with 2 lateral gas holes 103, lateral gas hole 103 is connected to the right side of boss 102；Outer 1 concave of ventilation block
The both sides of 101 top of slot are symmetrically set there are two gas distribution channel 104, and lateral gas hole 103 passes through air passing hole 105 and gas distribution channel
104 connections；The right side of boss 102 is symmetrically distributed with about the both sides of groove 101 vertical along its length in the outer ventilation block 1
To gas hole, longitudinal gas hole upper end is connect with gas distribution channel 104, and lower end is connected to the bottom surface of outer ventilation block 1, and longitudinal air blowing
The lower end in hole is bent to 101 side of groove, so that protection gas blowout gas direction is directed at welding position, is preferably carried out welding position guarantor
Shield；The upper surface of the outer ventilation block 1 is equipped with outer ventilation and connects hole 109, passes through transitional pore 110 between two gas distribution channels 104
It is connected, outer ventilation connects hole 109 and connects transitional pore 110, passes through transitional pore 110 and two gas distributions to make outer ventilation connect hole 109
Channel 104 is connected to；It is connected with groove 101 by middle part gas hole 111 among the transitional pore 110.
In the present embodiment, longitudinal gas hole is equipped with 3 pairs, respectively first longitudinal direction along outer 1 length direction of ventilation block
The distance between 108,2 gas hole 106, second longitudinal direction gas hole 107 and third longitudinal direction gas hole first longitudinal direction gas holes 106
Distance equal to 2 second longitudinal direction gas holes 107 and the distance more than 2 third longitudinal direction gas holes 108.Such design, along storage
Liquid device escape pipe it is circumferentially distributed, welding position is covered comprehensively, avoids air from being contacted with welding position completely.
The upper surface of the interior ventilation block 2 is equipped with the round platform 201 to match with the air inlet pipe of liquid storage device, round platform 201
Centre is equipped with interior gas hole 202；The side of the interior ventilation block 2 is equipped with interior ventilation and connects hole 203, interior ventilation connect hole 203 with it is interior
Gas hole 202 is connected to.
In addition, the upper surface of the outer ventilation block 1 is equipped with location hole 112, the bottom surface of interior ventilation block 2 is equipped with mounting hole
204, location hole 112 and mounting hole 204 are threaded hole, and outer ventilation block 1 is installed by location hole 112 and fixed, and interior ventilation block 2 is logical
It crosses the installation of mounting hole 204 to fix, liquid storage device is stable, accurate can limit and fix, welding is facilitated to operate.
When the welding of existing liquid storage device because in liquid storage device welding position temperature it is very high, be surrounded by oxygen and welding protected
Gas, so ventilation guarantor can be carried out to the inside of liquid storage device in the welding process using interior ventilation block 2 by oxidizing blackening, the present embodiment
Shield, avoids the above problem；It is passed through protection gas immediately after the completion of welding using outer ventilation block 1 to protect welding position, keeps away
The problem of oxidizing blackening, occurs for no-welding surface contacts air, and then avoids the pickling process after welding, avoids to environment
It pollutes, ensures product quality, the outer reasonable Arrangement of the block 1 by lateral gas hole 103 and longitudinal gas hole 106 of ventilating,
Protection gas can comprehensively be led to liquid storage device welding position surrounding, air contact weld position, the device is avoided to overcome completely
Steelwork uses the technical barrier of flame non-oxidation soldering with steelwork, and expand gas brazing uses field.
Embodiment 2
The present embodiment provides a kind of application method of air conditioning liquid reservoir welding protection device, which uses in embodiment 1
Air conditioning liquid reservoir welding protection device, the welding of cylinder and escape pipe for liquid storage device, cylinder and escape pipe are steel
Part, it is straight tube that escape pipe, which is located at the part in cylinder, is located at the bend pipe that the part outside cylinder is 90 °, the outer diameter of escape pipe is φ
15mm, wall thickness 1mm, the wall thickness of cylinder are 1.5mm, and the welding fit clearance of cylinder and escape pipe is 0.1mm, welding section cooperation length
Degree is 5mm.Using automatic turntable solderer, welded by gas brazing mode, concrete operation step is as follows：
1. the cylinder and escape pipe to liquid storage device to be welded carry out ultrasonic cleaning, the defects of removing surface and oil contaminant, get rusty, and
It is dry.
2. interior ventilation block 2 is fixed on by mounting hole 204 on solderer turntable, and the air inlet pipe end of liquid storage device is inserted in
On the round platform 201 of interior ventilation block 2, interior ventilation connects the connection of hole 203 protection gas air source.
3. it in the escape pipe insertion tube body of liquid storage device and will position, meanwhile, outer ventilation block 1 is stuck in out by groove 101
On tracheae, and outer ventilation block 1 is fixed by location hole 112, outer ventilation connects hole 109 and connects protection gas air source；Because escape pipe is bend pipe,
So in the present embodiment, groove 101 is also classified into trough portion and curved groove part so that escape pipe coordinates closely with groove 101, and
Each stomata can be directed at welding position.
4. flame welding gun is adjusted in place, interior ventilation block 2 connects Nitrogen source gases, and nitrogen controls gas full of inside liquid storage device
Pressure is 0.03MPa, is preheated to the welding position of cylinder and escape pipe, and access solder, starts to weld.In this step, weldering
Machine has 12 stations, realizes continuous automatic welding by dispenser, gage of wire is φ 1.2mm, using step motor control
Silk feeding quantity ensures that fill solder amount is unanimously uniform；Burning gases are natural gas and oxygen when welding, and protective gas is nitrogen,
It is automatically controlled by solenoid valve, to ensure that throughput is stablized, gas pressure 0.05MPa, oxygen pressure 0.3MPa, nitrogen pressure
Power is 0.03MPa.
In this step, no-clean scaling powder is used when welding, constituent and mass fraction are：3 parts of rosin, acetyl fourth
2 parts of acid dimethyl, 0.5 part of indolebutyric acid, 0.2 part of methylbenzotriazole, 75 parts of isopropanol.The scaling powder is halogen-free,
It has no irritating odor, is free from environmental pollution, adhesion is good, can reinforce Weldability, and solder joint is full, bright, secured, preferably reduces
It is soldered material surface tension, heat transfer is assisted, prevents oxidisability, improving speed of welding and cleaning metal, and it does not corrode
Base material, methylbenzotriazole enhance product stability, store 2.2 years, still with good performance.
In this step, using specific solder, constituent and mass fraction are：Cu is 57%, Zn 40%, and Sb is
0.6%, Mn 0.1%, Ni 0.4%, Sn 1.5%, S 0.4%.The solder adapts to thicker cylinder and goes out with relatively thin
Welding between tracheae is optimized the constituent and solder of solder, enhances its wetability and diffusion, compared to common
Strong solder wetability improve 2.1%, the diffusion rate of solder and base material improves 0.3 times, to effectively solve cylinder
The problem of thermal capacity of welding position is different when being welded from escape pipe, and welding condition is difficult to set weld firm, weld shape ratio
More consistent, weldquality is high.
The specific preparation method of above-mentioned solder is as follows：
1) Cu, Zn, Sb, Mn, Ni, Sn and S are weighed by above-mentioned weight percent first；
2) it takes the Sn of Cu therein and 40% to be placed in same pincers crucible, heats 30 minutes and stir under 1100 DEG C of temperature conditions
Homogeneous phase and form intermediate alloy；
3) intermediate alloy and remaining Sn are placed in melting kettle again, at a temperature of 350 DEG C, heating stirring 30 minutes, together
When above-mentioned Zn, Sb, Mn, Ni and S is added；
4) under 250 DEG C of temperature condition, finally formed solder alloy is stirred, ingot casting or cast bar；
5) it by ingot casting or cast bar, is squeezed under normal temperature condition, wire drawing becomes welding wire.
The solder mechanical tensile property obtained using this method is good, is not easily broken.
5. welding terminates moment, outer ventilation block 1 is connected into Nitrogen source gases immediately, welding position surrounding is full of protective gas,
And control pressure is 0.05MPa, excludes air, welding position is avoided to aoxidize.
6. liquid storage device is waited for be cooled to room temperature, stop internally ventilation block 2 and outer ventilation block 1 supply protection gas.
7. removing the liquid storage device welded, that is, complete welding operation.
Weld seam is checked, along escape pipe surrounding even weld, the smooth non-oxidation phenomenon in surface, and after testing in weld seam
Portion's pore-free, the defects of being mingled with, weld seam total quality is good.
Embodiment 3
The present embodiment provides a kind of application method of air conditioning liquid reservoir welding protection device, which uses in embodiment 1
Air conditioning liquid reservoir welding protection device, the welding of cylinder and escape pipe for liquid storage device, cylinder and escape pipe are steel
Part, it is straight tube that escape pipe, which is located at the part in cylinder, is located at the bend pipe that the part outside cylinder is 90 °, the outer diameter of escape pipe is φ
12mm, wall thickness 0.8mm, the wall thickness of cylinder are 1.6mm, and the welding fit clearance of cylinder and escape pipe is 0.2mm, welding section cooperation
Length is 7mm.Using automatic turntable solderer, welded by gas brazing mode, concrete operation step is as follows：
1. the cylinder and escape pipe to liquid storage device to be welded carry out ultrasonic cleaning, the defects of removing surface and oil contaminant, get rusty, and
It is dry.
2. interior ventilation block 2 is fixed on by mounting hole 204 on solderer turntable, and the air inlet pipe end of liquid storage device is inserted in
On the round platform 201 of interior ventilation block 2, interior ventilation connects the connection of hole 203 protection gas air source.
3. it in the escape pipe insertion tube body of liquid storage device and will position, meanwhile, outer ventilation block 1 is stuck in out by groove 101
On tracheae, and outer ventilation block 1 is fixed by location hole 112, outer ventilation connects hole 109 and connects protection gas air source；Because escape pipe is bend pipe,
So in the present embodiment, groove 101 is also classified into trough portion and curved groove part so that escape pipe coordinates closely with groove 101, and
Each stomata can be directed at welding position.
4. flame welding gun is adjusted in place, interior ventilation block 2 connects Nitrogen source gases, and nitrogen controls gas full of inside liquid storage device
Pressure is 0.05MPa, is preheated to the welding position of cylinder and escape pipe, and access solder, starts to weld.In this step, weldering
Machine has 12 stations, realizes continuous automatic welding by dispenser, gage of wire is φ 1.2mm, using step motor control
Silk feeding quantity ensures that fill solder amount is unanimously uniform；Burning gases are natural gas and oxygen when welding, and protective gas is nitrogen,
It is automatically controlled by solenoid valve, to ensure that throughput is stablized, gas pressure 0.07MPa, oxygen pressure 0.5MPa, nitrogen pressure
Power is 0.05MPa.
In this step, no-clean scaling powder is used when welding, constituent and mass fraction are：5 parts of rosin, acetyl fourth
1 part of acid dimethyl, 0.8 part of indolebutyric acid, 0.4 part of methylbenzotriazole, 80 parts of isopropanol.The scaling powder is halogen-free,
It has no irritating odor, is free from environmental pollution, adhesion is good, can reinforce Weldability, and solder joint is full, bright, secured, preferably reduces
It is soldered material surface tension, heat transfer is assisted, prevents oxidisability, improving speed of welding and cleaning metal, and it does not corrode
Base material, methylbenzotriazole enhance product stability, store 2 years, still with good performance.
In this step, using specific solder, constituent and mass fraction are：Cu is 59%, Zn 39%, and Sb is
1%, Mn 0.1%, Ni 0.5%, Sn 0.1%, S 0.3%.The solder adapts to thicker cylinder and relatively thin outlet
Welding between pipe is optimized the constituent and solder of solder, enhances its wetability and diffusion, compares commonly
Strong solder wetability improves 2%, and the diffusion rate of solder and base material improves 0.4 times, to effectively solve cylinder and go out
The problem of thermal capacity of welding position is different when tracheae welds, and welding condition is difficult to set, welding is firm, and weld shape compares one
It causes, weldquality is high.
The specific preparation method of above-mentioned solder is as follows：
1) Cu, Zn, Sb, Mn, Ni, Sn and S are weighed by above-mentioned weight percent first；
2) it takes the Sn of Cu therein and 50% to be placed in same pincers crucible, heats 35 minutes and stir under 1150 DEG C of temperature conditions
Homogeneous phase and form intermediate alloy；
3) intermediate alloy and remaining Sn are placed in melting kettle again, at a temperature of 355 DEG C, heating stirring 35 minutes, together
When above-mentioned Zn, Sb, Mn, Ni and S is added；
4) under 280 DEG C of temperature condition, finally formed solder alloy is stirred, ingot casting or cast bar；
5) it by ingot casting or cast bar, is squeezed under normal temperature condition, wire drawing becomes welding wire.
The solder mechanical tensile property obtained using this method is good, is not easily broken.
5. welding terminates moment, outer ventilation block 1 is connected into Nitrogen source gases immediately, welding position surrounding is full of protective gas,
And control pressure is 0.08MPa, excludes air, welding position is avoided to aoxidize.
6. liquid storage device is waited for be cooled to room temperature, stop internally ventilation block 2 and outer ventilation block 1 supply protection gas.
7. removing the liquid storage device welded, that is, complete welding operation.
Weld seam is checked, along escape pipe surrounding even weld, the smooth non-oxidation phenomenon in surface, and after testing in weld seam
Portion's pore-free, the defects of being mingled with, weld seam total quality is good.
Embodiment 4
The present embodiment provides a kind of application method of air conditioning liquid reservoir welding protection device, which uses in embodiment 1
Air conditioning liquid reservoir welding protection device, the welding of cylinder and escape pipe for liquid storage device, cylinder and escape pipe are steel
Part, it is straight tube that escape pipe, which is located at the part in cylinder, is located at the bend pipe that the part outside cylinder is 90 °, the outer diameter of escape pipe is φ
16mm, wall thickness 1.2mm, the wall thickness of cylinder are 1.8mm, and the welding fit clearance of cylinder and escape pipe is 0.2mm, welding section cooperation
Length is 8mm.Using automatic turntable solderer, welded by gas brazing mode, concrete operation step is as follows：
1. the cylinder and escape pipe to liquid storage device to be welded carry out ultrasonic cleaning, the defects of removing surface and oil contaminant, get rusty, and
It is dry.
2. interior ventilation block 2 is fixed on by mounting hole 204 on solderer turntable, and the air inlet pipe end of liquid storage device is inserted in
On the round platform 201 of interior ventilation block 2, interior ventilation connects the connection of hole 203 protection gas air source.
3. it in the escape pipe insertion tube body of liquid storage device and will position, meanwhile, outer ventilation block 1 is stuck in out by groove 101
On tracheae, and outer ventilation block 1 is fixed by location hole 112, outer ventilation connects hole 109 and connects protection gas air source；Because escape pipe is bend pipe,
So in the present embodiment, groove 101 is also classified into trough portion and curved groove part so that escape pipe coordinates closely with groove 101, and
Each stomata can be directed at welding position.
4. flame welding gun is adjusted in place, interior ventilation block 2 connects Nitrogen source gases, and nitrogen controls gas full of inside liquid storage device
Pressure is 0.06MPa, is preheated to the welding position of cylinder and escape pipe, and access solder, starts to weld.In this step, weldering
Machine has 12 stations, realizes continuous automatic welding by dispenser, gage of wire is φ 1.2mm, using step motor control
Silk feeding quantity ensures that fill solder amount is unanimously uniform；Burning gases are natural gas and oxygen when welding, and protective gas is nitrogen,
It is automatically controlled by solenoid valve, to ensure that throughput is stablized, gas pressure 0.08MPa, oxygen pressure 0.6MPa, nitrogen pressure
Power is 0.06MPa.
In this step, no-clean scaling powder is used when welding, constituent and mass fraction are：6 parts of rosin, acetyl fourth
4 parts of acid dimethyl, 1 part of indolebutyric acid, 0.6 part of methylbenzotriazole, 90 parts of isopropanol.The scaling powder is halogen-free, nothing
Penetrating odor, free from environmental pollution, adhesion is good, can reinforce Weldability, solder joint is full, bright, secured, preferably reduces quilt
Welding material surface tension assists heat transfer, prevents oxidisability, improving speed of welding and cleaning metal, and it does not corrode mother
Material, methylbenzotriazole enhance product stability, store 2.5 years, still with good performance.
In this step, using specific solder, constituent and mass fraction are：Cu is 60%, Zn 38%, and Sb is
0.4%, Mn 0.1%, Ni 0.3%, Sn 1.1%, S 0.1%.The solder adapts to thicker cylinder and goes out with relatively thin
Welding between tracheae is optimized the constituent and solder of solder, enhances its wetability and diffusion, compared to common
Strong solder wetability improve 2.1%, the diffusion rate of solder and base material improves 0.3 times, to effectively solve cylinder
The problem of thermal capacity of welding position is different when being welded from escape pipe, and welding condition is difficult to set weld firm, weld shape ratio
More consistent, weldquality is high.
The specific preparation method of above-mentioned solder is as follows：
1) Cu, Zn, Sb, Mn, Ni, Sn and S are weighed by above-mentioned weight percent first；
2) it takes the Sn of Cu therein and 60% to be placed in same pincers crucible, heats 40 minutes and stir under 1200 DEG C of temperature conditions
Homogeneous phase and form intermediate alloy；
3) intermediate alloy and remaining Sn are placed in melting kettle again, at a temperature of 400 DEG C, heating stirring 40 minutes, together
When above-mentioned Zn, Sb, Mn, Ni and S is added；
4) under 300 DEG C of temperature condition, finally formed solder alloy is stirred, ingot casting or cast bar；
5) it by ingot casting or cast bar, is squeezed under normal temperature condition, wire drawing becomes welding wire.
The solder mechanical tensile property obtained using this method is good, is not easily broken.
5. welding terminates moment, outer ventilation block 1 is connected into Nitrogen source gases immediately, welding position surrounding is full of protective gas,
And control pressure is 0.1MPa, excludes air, welding position is avoided to aoxidize.
6. liquid storage device is waited for be cooled to room temperature, stop internally ventilation block 2 and outer ventilation block 1 supply protection gas.
7. removing the liquid storage device welded, that is, complete welding operation.
Weld seam is checked, along escape pipe surrounding even weld, the smooth non-oxidation phenomenon in surface, and after testing in weld seam
Portion's pore-free, the defects of being mingled with, weld seam total quality is good.
Example of the present invention is only that the preferred embodiment of the present invention is described, not to present inventive concept and
Range is defined, under the premise of not departing from design philosophy of the present invention, technology of this field engineers and technicians to the present invention
The various modifications and improvement that scheme is made, should all fall into protection scope of the present invention.
Claims (3)
1. a kind of application method of air conditioning liquid reservoir welding protection device, operating procedure are as follows：
1. carrying out ultrasonic cleaning, removal surface and oil contaminant, defect of getting rusty, and drying to liquid storage device to be welded；
2. interior ventilation block (2) is fixed, and the air inlet pipe end of liquid storage device is inserted on the round platform (201) of interior ventilation block (2), it is interior logical
Gas connects hole (203) connection protection gas air source；
3. it in the escape pipe insertion tube body of liquid storage device and will position, meanwhile, outer ventilation block (1) is stuck in out by groove (101)
On tracheae, and fixed outer ventilation block (1), outer ventilation connect hole (109) and connect protection gas air source；
4. flame welding gun is adjusted in place, interior ventilation block (2) connects air source, and protective gas is full of inside liquid storage device, control pressure
For 0.03-0.06MPa, the welding position of cylinder and escape pipe is preheated, and access solder, starts to weld；
Welding use constituent and the mass fraction of solder for：Cu is that 57%~60%, Zn is that 38%~40%, Sb is
It is 0.1%~1.5%, S is 0.1%~0.4% that 0.4%~1%, Mn 0.1%, Ni, which are 0.3%~0.5%, Sn,；
5. welding terminates moment, outer ventilation block (1) is connected into air source immediately, welding position surrounding is full of protective gas, and controls
Air pressure is 0.05-0.10MPa, excludes air, welding position is avoided to aoxidize；
6. liquid storage device is waited for be cooled to room temperature, stop internally ventilation block (2) and outer ventilation block (1) supply protection gas；
7. removing the liquid storage device welded, that is, complete welding operation；
Air conditioning liquid reservoir welding protection device includes outer ventilation block (1) and interior ventilation block (2)；The outer ventilation block (1) is square
Shape block structure, left side are internally provided with groove (101), and groove (101) and the escape pipe of liquid storage device match, outer ventilation block
(1) left end of bottom surface is equipped with boss (102), and 2 lateral gas holes are symmetrically equipped in the boss (102) of groove (101) both sides
(103), lateral gas hole (103) is connected to the right side of boss (102)；Above outer ventilation block (1) further groove (101)
Both sides are symmetrically set there are two gas distribution channel (104), and lateral gas hole (103) passes through air passing hole (105) and gas distribution channel (104)
Connection；Both sides of the right side of boss (102) along its length about groove (101) are symmetrical in the outer ventilation block (1)
There are longitudinal gas hole, longitudinal gas hole upper end to be connect with gas distribution channel (104), lower end is connected to the bottom surface of outer ventilation block (1)；Institute
The upper surface for the outer ventilation block (1) stated is equipped with outer ventilation and connects hole (109), and outer ventilation connects hole (109) connection gas distribution channel (104)；
The upper surface of the interior ventilation block (2) is equipped with the round platform (201) to match with the air inlet pipe of liquid storage device, in round platform (201)
Between be equipped with interior gas hole (202)；The side of the interior ventilation block (2) is equipped with interior ventilation and connects hole (203), and interior ventilation connects hole
(203) it is connected to interior gas hole (202).
2. a kind of application method of air conditioning liquid reservoir welding protection device according to claim 1, it is characterised in that：It is described
Step is 4. middle to be welded using automatic turntable solderer, and welding machine has 12 stations, and continuous automatic welding is realized by dispenser
It connects, gage of wire is φ 1.2mm；Burning gases are natural gas and oxygen when welding, and protective gas is nitrogen, and gas pressure is
0.05-0.08MPa, oxygen pressure 0.3-0.6MPa, nitrogen pressure 0.03-0.06MPa；Weldering between escape pipe and cylinder
It is 0.1-0.2mm to connect gap, and welding section length of fit is 5-8mm.
3. a kind of application method of air conditioning liquid reservoir welding protection device according to claim 2, it is characterised in that：Welding
Using no-clean scaling powder, constituent and mass fraction are：3~6 parts of rosin, 1~4 part of diacetyl succinic acid dimethyl ester, Yin
0.5~1 part of diindyl butyric acid, 0.2~0.6 part of methylbenzotriazole, 75~90 parts of isopropanol.
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| CN109926691B (en) * | 2017-12-19 | 2020-11-20 | 佛山市胜安制冷配件有限公司 | Gas welding protection device for welding refrigeration system parts |
| CN107984053B (en) * | 2017-12-19 | 2020-03-27 | 佛山市胜安制冷配件有限公司 | Gas welding protection device |
| CN110878997B (en) * | 2018-09-06 | 2021-09-07 | 南通华信中央空调有限公司 | Split liquid separation head packaging method, split liquid separation head refitting method and heat exchanger |
| CN109719370A (en) * | 2019-01-28 | 2019-05-07 | 嵊州市新起点焊接科技有限公司 | A kind of processing technology of abnormal shape liquid reservoir |
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Denomination of invention: Application method of welding protection device for air conditioner liquid reservoir Effective date of registration: 20210915 Granted publication date: 20180831 Pledgee: Anhui Ma'anshan Rural Commercial Bank Co.,Ltd. Pledgor: ANHUI ZHONGHUI REFRIGERATION Co.,Ltd. Registration number: Y2021980009409 |
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