CN109420814A - A kind of reflow soldering and Gas recovering method - Google Patents
A kind of reflow soldering and Gas recovering method Download PDFInfo
- Publication number
- CN109420814A CN109420814A CN201710726250.7A CN201710726250A CN109420814A CN 109420814 A CN109420814 A CN 109420814A CN 201710726250 A CN201710726250 A CN 201710726250A CN 109420814 A CN109420814 A CN 109420814A
- Authority
- CN
- China
- Prior art keywords
- gas
- reflow soldering
- zeolite
- burner hearth
- case
- Prior art date
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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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/04—Heating appliances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
Abstract
The present invention provides a kind of reflow soldering and Gas recovering methods, including reflow soldering burner hearth；Separator, separator inlet are connected to the gas outlet stream of reflow soldering burner hearth, so that the gas in reflow soldering burner hearth flows into separator；Zeolite case, zeolite tank inlet are connected with separator outlet, and the outlet of zeolite case and the gas access of reflow soldering burner hearth are in fluid communication, and the gas for passing through separator enters zeolite case, and the gas for passing through zeolite case is exported from zeolite case and flowed out；Sensor is arranged in the gas passage between the zeolite case outlet and the gas access of reflow soldering burner hearth.Reflow soldering of the invention enters zeolite case by flowing through the gas of separator, after gas removes most of scaling powder in the separator, further removes scaling powder in zeolite case.And the zeolite of polyhedral shapes has certain volume, can prop up in zeolite case and overhang certain gap, so that zeolite case be made hardly to cause resistance to the flowing of gas.
Description
Technical field
The invention belongs to the field of Reflow Soldering, in particular to a kind of reflow soldering and Gas recovering method.
Background technique
What the surface sealing label (SMT) of electronic product was completed generally by solder reflow techniques, solder reflow techniques are to flow back
In brazier burner hearth, a certain proportion of air or nitrogen are heated to sufficiently high temperature after-blow to the route for having posted element
Plate bonds after melting the solder of elements on either side with mainboard.In this course, it needs Reflow Soldering through gas control system
Oxygen volume ratio in burner hearth controls below 8/10000ths, it is therefore desirable to continual to be passed through more nitrogen, cost mistake
It is high.
Therefore, it is provided with the gas concentration unit being connected with reflow soldering burner hearth in the prior art, makes gas from Reflow Soldering
After the output of furnace burner hearth, the scaling powder in gas is removed by separator, then gas is sent back in burner hearth again and carries out repeating benefit
With.Oxygen content detection sensor is wherein installed, the gas after removing scaling powder is logical between the output end and burner hearth of separator
Cross oxygen content detection sensor obtain oxygen content in gas as a result, and controlled according to the result and to be inputted into burner hearth
Nitrogen amount, in the range of making oxygen and nitrogen content ratio in reflow soldering burner hearth maintain setting.
Therefore, in need that a kind of nitrogen recycling control device of the improvement in reflow soldering burner hearth is provided.
Summary of the invention
Inventor passes through long-term test and observation, and discovery includes the reflow soldering of the prior art, welding product quality
It is unstable sometimes, the reason is that the gas ratio in reflow soldering burner hearth fail it is stable maintain setting in the range of.Invention
People has found that the separating technology in existing separator is difficult completely to remove the scaling powder in gas, micro after tested
Scaling powder is easy to condense in the test side of sensor, causes sensor reading in permanent work is inaccurate even to fail, to make
It obtains and not can be carried out effectively nitrogen ratios control.
Simply adding first level filtering device in the downstream of separator will increase gas circulating resistance in filtration channel, thus
Cause other problems.
In order to solve problem above, at least one purpose of the invention is to provide a kind of reflow soldering, makes reflow soldering furnace
Gas ratio in thorax is stablized, and can improve the ingredient of the remaining scaling powder after separator, to protect sensor.
To achieve the goals above, the first aspect of the present invention provides a kind of reflow soldering, and the reflow soldering includes
Reflow soldering burner hearth, the reflow soldering burner hearth include gas vent and gas access, the reflow soldering further include:
Separator, the separator include separator inlet and separator outlet, the separator inlet and the reflux
The gas outlet stream of brazier burner hearth is connected to, so that the gas in the reflow soldering burner hearth flows into separator；
Zeolite case, the zeolite case include zeolite tank inlet and the outlet of zeolite case, and the zeolite tank inlet is separated with described
Device outlet is connected, and the zeolite case outlet and the gas access of the reflow soldering burner hearth are in fluid communication, and passes through separation
The gas of device enters zeolite case, and the gas for passing through zeolite case is exported from the zeolite case and flowed out；
Sensor, the sensor are arranged between the zeolite case outlet and the gas access of the reflow soldering burner hearth
Gas passage in.
According to above-mentioned in a first aspect, the reflow soldering burner hearth, which is equipped with nitrogen, adjusts channel, the reflow soldering is also wrapped
It includes:
Nitrogen adjustment valve, the nitrogen adjustment valve adjusts channel with nitrogen and is connected, for adjusting nitrogen input quantity；
Control device, the control device receive the detection signal come from sensor conveying, and according to sensor
Signal is detected to control the nitrogen adjustment valve.
According to above-mentioned in a first aspect, the zeolite case includes:
Cabinet, the cabinet have cavity；
Interior cylinder mould, interior cylinder mould are removably mounted in cavity, are equipped with grid in at least two sides of the interior cylinder mould, described
Zeolite is accommodated in interior cylinder mould, and the grid is for stopping zeolite；
Case lid, the case lid seal the cavity.
According to above-mentioned in a first aspect, the zeolite is polyhedral shapes, so that having gap between the zeolite.
According to above-mentioned in a first aspect, the mean particle size of the zeolite is not less than or is 2cm.
According to above-mentioned in a first aspect, being equipped with gasket between the case lid and the cabinet.
According to above-mentioned in a first aspect, it is porous plate that the interior cylinder mould, which flows through the opposite two side walls of nitrogen,.
The second aspect of the present invention provides a kind of recovery method of gas for reflow soldering, reflow soldering burner hearth packet
Include gas vent and gas access, comprising the following steps:
The gas for exporting the gas vent of reflow soldering burner hearth successively flows over after separator separates through zeolite case
After filter, it is removed the scaling powder in gas；
Then sensor is passed the gas through, the concentration of oxygen in gas is obtained；
It finally passes the gas through in the gas access input reflow soldering burner hearth of reflow soldering burner hearth；
According to the testing result of sensor, controls nitrogen and input the reflow soldering burner hearth.
According to above-mentioned second aspect, the pressure of gas coming through no more than 2kpa or is 1~2kpa in the zeolite case.
According to above-mentioned second aspect, the speed of gas coming through is not more than 15m in the zeolite case3/ h is 15m3/h。
Reflow soldering of the invention enters zeolite case by flowing through the gas of separator, and gas removes greatly in the separator
After the scaling powder of part, scaling powder is further removed in zeolite case, so that protection exports the sensor being connected with zeolite case.This hair
Zeolite is filled in bright zeolite case, zeolite interior is filled with subtle hole and channel, makes zeolite for having already passed through separation
Device removes the gas after scaling powder, and remaining low content flux ingredients have especially significant removal effect.And polygonal
The zeolite of shape has certain volume, can prop up in zeolite case and overhang certain gap, to keep zeolite case hardly right
The flowing of gas causes resistance.In cavity in zeolite case have interior cylinder mould, interior cylinder mould while accommodating and stopping zeolite,
Convenient for the replacement of zeolite.Meanwhile nitrogen amount is inputted into burner hearth to control according to the testing result of sensor, make the gas in burner hearth
Body ratio is stablized.
Detailed description of the invention
Fig. 1 is the connection block diagram of each component of reflow soldering of the invention；
Fig. 2 is the partial structural diagram in the present invention comprising zeolite case；
Fig. 3 is the partial exploded view of Fig. 2, for showing the more specific modular construction of zeolite case；
Fig. 4 is the top view of Fig. 2, for showing the more specific outer mounting structure of zeolite case；
Fig. 5 be Fig. 4 along A-A to cross-sectional view, for showing the more specific inner mounting structure of zeolite case；
Fig. 6 A is the interior cylinder mould side wall construction schematic diagram according to one embodiment of the present of invention；
Fig. 6 B is the interior cylinder mould side wall construction schematic diagram according to another embodiment of the invention.
Specific embodiment
Various specific embodiments of the invention are described below with reference to the attached drawing for constituting this specification a part.
Although it should be understood that be used in the present invention indicate direction term, such as "front", "rear", "upper", "lower", " left side ",
" right side " etc. describes various example features and element of the invention, but herein using these terms are merely for convenience of description
Purpose, the determination based on the example orientations shown in attached drawing.Since disclosed embodiment of this invention can be according to difference
Direction setting, so these indicate directions term be intended only as illustrate and should not be considered as limiting.In the conceived case,
Identical or similar appended drawing reference used in the present invention refers to identical component.
Electronic apparatus plate in reflow soldering in Reflow Soldering, hot environment can make scaling powder be evaporated to gas and and its
His gas mixing, the gas after mixing containing flux ingredients is by the gas vent outflow on reflow soldering burner hearth, through excessive
After removing flux ingredients from device, is returned in reflow soldering burner hearth using the gas access on reflow soldering burner hearth and complete gas
Recycle.Other described gases can be air inside reflow soldering or specific inert gas or inert gas
Mixture.In reflow soldering of the invention, the specific nitrogen of ratio and oxygen mixture that other described gases refer to.
Wherein, the transport flowing of gas is using the negative pressure generated in reflow soldering by fan (not shown) come real
Existing.In existing reflow soldering, which is typically already existed in reflow soldering.It is insufficient to allow gas to flow in the negative pressure
In the case where the circulation for completing gas, it also can use additional fan or motor increase the power of gas flowing.
Fig. 1 shows the connection block diagram of each component of reflow soldering 100 of the invention.Specifically as shown in Figure 1, the present invention
Reflow soldering include reflow soldering burner hearth 101, separator 105, zeolite case 107 and sensor 106.Reflow soldering burner hearth 101
It is upper that there is gas vent 102 and gas access 103.
By gas pipeline be connected to gas vent 102 and separator 105 separator inlet 110, can make containing help weld
The gas of agent flows into separator 105 from gas vent 102, and the scaling powder of the overwhelming majority is removed by separator 105.Separator
105 also have separator outlet 111, and the zeolite tank inlet of separator outlet 111 and zeolite case 107 is connected to by gas pipeline
112, the gas that can pass through separator 105 enters back into zeolite case 107, and exports from the zeolite case of zeolite case 107
113 outflows, make gas completely remove remaining scaling powder in zeolite case 107.The setting of sensor 106 exports 113 in zeolite case
In gas pipeline between the gas access 103 of reflow soldering burner hearth, so that completely eliminated the gas of scaling powder from boiling
After 113 outflow of stone case outlet, sensor 106 can be first passed through and detect oxygen concentration, and after can be detected signal, then passed through
It crosses gas access 103 and is delivered to reflow soldering burner hearth 101.
The gas pipeline can comparably substitute another conduit, similar to channel etc..
It further include that nitrogen adjusts channel 115, nitrogen adjustment valve 116 and control dress in reflow soldering still as shown in Figure 1
Set 120.One end that nitrogen adjusts channel 115 is connected with reflow soldering burner hearth 101, and the other end is connected with source nitrogen 117, uses
In to 101 supplying nitrogen of reflow soldering burner hearth.Nitrogen adjustment valve 116 is located at nitrogen and adjusts in channel 115, passes through control device
120 can control nitrogen adjustment valve 116, to control the nitrogen amount conveyed into reflow soldering burner hearth 101.Control device 120
The detection signal for reflecting nitrogen ratios from sensor 106 is received, controls whether to need suitable nitrogen according to the detection signal
It is transported in reflow soldering burner hearth 101, to guarantee that nitrogen in reflow soldering burner hearth 101 and oxygen proportion are maintained and set in advance
Fixed ratio.In reflow soldering of the invention, since the volume ratio of oxygen only needs control 8/10000ths hereinafter, therefore not
It needs in addition to be arranged oxygen and adjusts channel.And in the case where inert gas is other gases, those skilled in the art can also be with
Other gas regulation channels are set, and the regulating valve of regulating gas size is connected with control device 120.
The course of work of the invention as a result, are as follows: after reflow soldering starts welding, the scaling powder steam and nitrogen, oxygen of generation
Gas is mixed into the gas containing flux ingredients, and the gas is after the outflow of gas vent 102 by using separation in separator 105
Technique remove most of scaling powder, remove remaining scaling powder using flow filtration technique using zeolite case 107, most pass through afterwards
It crosses gas access 103 to return in reflow soldering burner hearth 101, continues to participate in the welding process of Reflow Soldering.Also, the gas is returning to
The oxygen content that sensor 106 comes in detection gas is first passed through before gas access 103, nitrogen is adjusted according to testing result and adjusts
Valve 116 is delivered to nitrogen in proportion in reflow soldering burner hearth 101 from source nitrogen 117, to maintain in reflow soldering burner hearth 101
Nitrogen and oxygen ratio, guarantee welding effect in the welding process.
Above-mentioned separator 105 can remove scaling powder by various separate modes, such as by condensing scaling powder
Mode, or by way of decomposing scaling powder etc., do not influence effect of the invention.In a wherein example, this hair
Bright separator 105 is to remove scaling powder by way of decomposing scaling powder, to make by 105 separating and filtering of separator
It only include the scaling powder of lower content in the gas flowed out afterwards, in a wherein example, after 105 separating and filtering of separator
Residual flux content is 10% in the gas of outflow, and is only capable of examining in the gas flowed out after 107 flow filtration of zeolite case
It measures micro or can't detect remaining scaling powder.
Fig. 2 shows the specific structures of zeolite case 107 in the present invention, in zeolite case as shown in Figure 2, zeolite case 107
Entrance be connected with separator outlet 111 by gas pipeline, and be connected with sensor 106 in the outlet of zeolite case 107.
Zeolite case 107 includes cabinet 221 and case lid 225, and in order to show the more specific internal structure of zeolite case 107, Fig. 3 shows figure
The explosive view of zeolite box part in 2.As shown in figure 3, cabinet 221 has cavity 322, for accommodating interior cylinder mould 323.Interior cylinder mould
It can be accommodated in 323 and stop zeolite 538, so that can be realized when needing replacing zeolite 538 by cylinder mould 323 in dismantling,
It is easy to operate.The specific structure of the interior cylinder mould 323 describes in detail later.One side of the cabinet 221 is opening shape,
So that interior cylinder mould 323 can be assembled or be dismantled by the opening position.Case lid 225 is used to seal the opening position, in order to
Reach better seal effect, gasket 327 is also provided between cabinet 221 and 225.
Fig. 4 shows the top view of Fig. 2, for showing the more specific outer mounting structure of zeolite case, and in order to more clear
The zeolite tank inlet 112 and zeolite case of the presentation zeolite case 107 of Chu export 113, Fig. 5 show Fig. 4 along A-A to cross-sectional view,
For showing the more specific inner mounting structure of zeolite case, wherein center line of the line A-A along gas pipeline.Such as Fig. 4 and Fig. 5 institute
Show, zeolite case has zeolite tank inlet 112 and zeolite case outlet 113.Wherein in zeolite tank inlet 112 and zeolite case outlet 113
Place respectively has casing 537, zeolite tank inlet 112 and zeolite case can be made to export 113 by casing 537 and be socketed in gas pipeline
Among, the position of the socket can be fixed by snap ring or clip.To make gas flow to zeolite from separator outlet 111
During case 107 and during gas flows out to sensor 106 from zeolite case 107, there is better sealing.
As shown in figure 5, zeolite 538 of the present invention should be the particle of several polyhedral shapes of accumulation, in heap
With certain volume when product, and it can prop up and overhang certain gap 536 and flowed through with supplied gas.The portion void 536
Should be big as far as possible, so that with the resistance for reducing circulation when gas passes through zeolite 538.As an example, zeolite 538
Average grain diameter be 2 centimetres or so, the zeolite 538 under the partial size can cooperate with interior cylinder mould 323, make to flow in zeolite case 107
Pressure through gas reaches 1~2kpa, and the speed of gas coming through reaches 15m in zeolite case 1073/h.It is flowed in the gas
Pressure be not less than 15m no more than 2kpa or for 1~2kpa and flowing velocity3/ h is 15m3In the case where/h, gas is carried out
The fan or motor outside plus are not needed during circulation, only the fan (not shown) in reflow soldering mentions
The flowing of gas can be realized in the negative pressure of confession.Meanwhile the inside of zeolite 538 is filled with subtle hole and channel, for from point
There is particularly preferred clean-up effect from the gas containing low content scaling powder that device 105 flows out.
Still as shown in figure 5, the zeolite 538 is deposited in interior cylinder mould 323, the full interior cylinder mould 323 of the filling of zeolite 538
Meanwhile interior cylinder mould 323 can stop zeolite 538.In order to allow gas to enough flow through zeolite 538, interior cylinder mould 323 is at least in zeolite case
Entrance 112 and zeolite case, which export, has certain grid 628.1 or 628.2 on the side wall 324 in 112 directions, which can hinder
Keep off zeolite 538.
It needs grid 628.1 or 628.2 especially set out, described only to play to pass the gas through, while stopping zeolite
538 effect is not played the role of removing remaining scaling powder, therefore the size of the grid 628.1 or 628.2 should basis
The size of zeolite determines.Specifically, in order to reduce as far as possible interior cylinder mould 323 to gas pass through caused by resistance, interior cylinder mould
Side wall 324 should have grid 628.1 or 628.2 as big as possible, while when needing to avoid grid 628.1 or 628.2 excessive,
Zeolite 538 is leaked out from grid 628.1 or 628.2.It is of the invention in one embodiment, the interior cylinder mould 323 is in gas
Side wall 324 on body flow direction is porous plate 628.1 as shown in Figure 6A.And in another embodiment of the present invention, institute
Stating side wall can be barrier board 628.2 as shown in Figure 6B, not influence actual effect of the invention.The interior cylinder mould 323
It can also make four side walls that all there is network etc., can stop zeolite 538 guaranteeing that it has and pass the gas through
Under it is required that, the mode of those skilled in the art as required can be made to set.
In this application, after removing most of scaling powder using the process decomposed in separator 105, remaining scaling powder
It is removed using zeolite case 107 using flow filtration process.This is a kind of air or specific lazy of inside in reflow soldering
Property gas or noble gas mixtures (such as nitrogen and oxygen) in remove the prioritization scheme and structure of remaining scaling powder.
Although with reference to the specific embodiment shown in attached drawing, present invention is described, but it is to be understood that not
Away from present invention teach that spirit and scope and background under, gas concentration unit of the invention can be there are many version.This
Field technology those of ordinary skill will additionally appreciate different modes to change the structure in disclosed embodiment of this invention
Details is each fallen in the present invention and spirit and scope of the claims.
Claims (10)
1. a kind of reflow soldering, the reflow soldering includes reflow soldering burner hearth (101), reflow soldering burner hearth (101) packet
Include gas vent (102) and gas access (103), it is characterised in that the reflow soldering further include:
Separator (105), the separator (105) include separator inlet (110) and separator outlet (111), the separation
Device entrance (110) and the gas vent (102) of the reflow soldering burner hearth (101) are in fluid communication, so that the reflow soldering furnace
Gas in thorax (101) flows into separator (105)；
Zeolite case (107), the zeolite case (107) include zeolite tank inlet (112) and zeolite case outlet (113), the zeolite
Tank inlet (112) is connected with the separator outlet (111), the zeolite case outlet (113) and the reflow soldering burner hearth
(101) gas access (103) is in fluid communication, and the gas for passing through separator (105) enters zeolite case (107), and makes
The gas that zeolite case (107) must be flowed through exports (113) from the zeolite case and flows out；
Sensor (106), sensor (106) setting is in zeolite case outlet (113) and the reflow soldering burner hearth
(101) in the gas passage between gas access (103).
2. reflow soldering as described in claim 1, the reflow soldering burner hearth (101) is equipped with nitrogen and adjusts channel (115),
It is characterized in that the reflow soldering further include:
Nitrogen adjustment valve (116), the nitrogen adjustment valve (116) adjusts channel (115) with nitrogen and is connected, defeated for adjusting nitrogen
Enter amount；
Control device (120), the control device (120) receive the detection signal come from the sensor (106) conveying, and root
The nitrogen adjustment valve (116) are controlled according to the detection signal of sensor (106).
3. reflow soldering as described in claim 1, it is characterised in that the zeolite case (107) includes:
Cabinet (221), the cabinet (221) have cavity (322)；
Interior cylinder mould (323), interior cylinder mould (323) are removably mounted in cavity (322), the interior cylinder mould (323) at least
Two sides are equipped with grid (628), and for accommodating zeolite (538) in the interior cylinder mould (323), and the grid (628) is for hindering
It keeps off zeolite (538)；
Case lid (225), the case lid (225) seal the cavity (322).
4. reflow soldering as claimed in claim 3, it is characterised in that:
The zeolite (538) is polyhedral shapes, so that having gap (536) between the zeolite (538).
5. reflow soldering as claimed in claim 4, it is characterised in that:
The mean particle size of the zeolite (538) is not less than or is 2cm.
6. reflow soldering as claimed in claim 3, it is characterised in that:
Gasket (327) are equipped between the case lid (225) and the cabinet (221).
7. reflow soldering as claimed in claim 3, it is characterised in that:
It is porous plate that the interior cylinder mould (323), which flows through the opposite two side walls of nitrogen (324),.
8. a kind of recovery method of the gas for reflow soldering, reflow soldering burner hearth (101) includes that gas vent (102) is gentle
Body entrance (103), it is characterised in that the following steps are included:
The gas for exporting the gas vent (102) of reflow soldering burner hearth (101) is successively through boiling after separator (105) separation
After stone case (107) flow filtration, it is removed the scaling powder in gas；
Then it passes the gas through sensor (106), obtains the concentration of oxygen in gas；
It finally passes the gas through in gas access (103) input reflow soldering burner hearth (101) of reflow soldering burner hearth (101), and
And according to the testing result of sensor (106), controls nitrogen and input the reflow soldering burner hearth (101).
9. method according to claim 8, it is characterised in that: the pressure of gas coming through is not more than in the zeolite case (107)
2kpa is 1~2kpa.
10. method according to claim 8, it is characterised in that: the speed of gas coming through is not less than in the zeolite case (107)
15m3/ h is 15m3/h。
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710726250.7A CN109420814A (en) | 2017-08-22 | 2017-08-22 | A kind of reflow soldering and Gas recovering method |
| TW107127245A TWI779074B (en) | 2017-08-22 | 2018-08-06 | A reflow oven and a method for recovering gas |
| JP2020511316A JP7227961B2 (en) | 2017-08-22 | 2018-08-09 | Reflow furnace with zeolite box and method for recovering gas using zeolite box |
| EP18760115.8A EP3672754B1 (en) | 2017-08-22 | 2018-08-09 | A reflow oven with a zeolite box, and a method of recovering gas with such zeolite box |
| US16/640,153 US11440116B2 (en) | 2017-08-22 | 2018-08-09 | Reflow oven with a zeolite box, and a method for recovering gas with such zeolite box |
| PCT/US2018/045899 WO2019040284A1 (en) | 2017-08-22 | 2018-08-09 | A reflow oven with a zeolite box, and a method of recovering gas with such zeolite box |
| US17/941,316 US20230001498A1 (en) | 2017-08-22 | 2022-09-09 | Reflow oven with a zeolite box, and a method for recovering gas with such zeolite box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710726250.7A CN109420814A (en) | 2017-08-22 | 2017-08-22 | A kind of reflow soldering and Gas recovering method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109420814A true CN109420814A (en) | 2019-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710726250.7A Pending CN109420814A (en) | 2017-08-22 | 2017-08-22 | A kind of reflow soldering and Gas recovering method |
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| Country | Link |
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| CN (1) | CN109420814A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112807929A (en) * | 2021-03-25 | 2021-05-18 | 深圳市劲拓自动化设备股份有限公司 | Gas circulation filter equipment and reflow soldering system |
| CN114025495A (en) * | 2021-11-11 | 2022-02-08 | 惠州润众科技股份有限公司 | Circuit board spot welding equipment based on flue circulation mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112807929A (en) * | 2021-03-25 | 2021-05-18 | 深圳市劲拓自动化设备股份有限公司 | Gas circulation filter equipment and reflow soldering system |
| CN114025495A (en) * | 2021-11-11 | 2022-02-08 | 惠州润众科技股份有限公司 | Circuit board spot welding equipment based on flue circulation mechanism |
| CN114025495B (en) * | 2021-11-11 | 2024-03-08 | 惠州润众科技股份有限公司 | Circuit board spot welding equipment based on flue circulation mechanism |
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