CN207822772U - A kind of smokeless crest welder - Google Patents
A kind of smokeless crest welder Download PDFInfo
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- CN207822772U CN207822772U CN201721739659.4U CN201721739659U CN207822772U CN 207822772 U CN207822772 U CN 207822772U CN 201721739659 U CN201721739659 U CN 201721739659U CN 207822772 U CN207822772 U CN 207822772U
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Abstract
The utility model discloses a kind of smokeless crest welders, including crest welder and smoke multistage purifier, crest welder includes outer cover, the spraying fume extractor in outer cover and soldering furnace fume extractor, smoke multistage purifier includes air inlet and exhaust outlet, air inlet is connect by gas cleaning channel with exhaust outlet, smoke outlet is hermetically connected to air inlet, exhaust outlet is installed between the external wall of upper portion of soldering furnace and the inside roof of outer cover, outer cover is open without smoke evacuation, and water purification installation, electronic purification device and power plant are hermetically equipped on gas cleaning channel.The multistage purification that the flue gas of the smokeless crest welder of the utility model passes through water purification installation and electronic purification device; by in flue gas harmful substance and gas properly green, Harmless processing; realize smokeless emission; conducive to the protection to welding product and operating personnel; conducive to the raising of welding quality; conducive to the improvement of working environment, the more conducively protection of atmospheric environment.
Description
Technical field
The utility model is related to crest welder harmful smoke purified treatment fields, and in particular to a kind of smokeless crest welder.
Background technology
Various welding procedures are largely used in electronics industry, and surface-assembled production process especially is carried out to printed circuit board
In, to meet the welding of high-volume electronic device and integrated circuit, the advanced technologies such as wave-soldering, Reflow Soldering are widely used.
In solder wave process, by crest welder by the solder (terne metal) of fusing, through electrodynamic pump or electromagnetism
Solder wave of the jet flow at design requirement is pumped, can also be formed by injecting nitrogen to solder pot, make to be pre-loaded with component
Pcb board realizes component welding end or pin and the room machine of pcb board pad and the solder of electrical connection by solder wave.
The furnace body of crest welder is generally disposed above crest welder, since furnace body scolding tin generates a large amount of dense smokes, therefore on furnace body shell
It is cased with outer cover, and discharge flue is set on outer cover and plays the role of the smoke evacuation to crest welder.
In reflow soldering process, the printed circuit board for posting element is welded by reflow machine, reflow machine is adopted
With the internal-circulation type heating system of multiple temperature regions, since solder(ing) paste is constituted using a variety of alloy materials, different temperatures and when
Between can cause the different variations of tin cream state.In high-temperature region, solder(ing) paste is fused into liquid, and surface mount elements are easy and solder(ing) paste phase group
It closes；Into after cooling zone, solder(ing) paste is frozen into solid-state, and the pin of surface mount elements and printed circuit board are firmly welded into one
Body.
Above-mentioned welding machine will produce a large amount of harmful smoke in the welding process, and the pollutant kind in flue gas is more, harm is big,
It is mostly to import that can lead to the generation of a variety of occupational diseases (such as welder's silicosis, manganese poisoning, electric ophthalmia), traditional processing mode
Factory's exhaust system direct emission is in air, not environmentally, can cause air environmental pollution, or by installing solid particle additional
Simple filter apparatus is not thorough the harmful smoke processing largely generated in welding, can not ensure that the body of operation people is strong
Health.Current people also have been devoted to the research and processing of this respect, but main or to collect based on scaling powder (rosin), but
Also it is merely that simple filtration processing is carried out to the scaling powder (rosin) among cigarette, gas, it is high without fundamentally solving reflow machine
Cigarette, gas and the pernicious gas given out after temperature carries out corresponding appropriate purification environmental-protection processing.Therefore, it is necessary to add to the above deficiency
To improve.
Invention content
To overcome deficiencies of the prior art, the purpose of this utility model, which is to provide one kind, thoroughly have been handled
The smokeless crest welder of evil flue gas, crest welder in vitro without smoke pipe discharge, is achieved through the following technical solutions：A kind of no mist-covered waters
Peak welding machine, including crest welder and smoke multistage purifier, the crest welder include outer cover, the weldering in the outer cover
Stove and smoke outlet are connect, the smoke multistage purifier includes air inlet and exhaust outlet, and the air inlet is logical by gas cleaning
Road is connect with the exhaust outlet, and the smoke outlet is hermetically connected to the air inlet, and the exhaust outlet is installed on the weldering
It connects between the external wall of upper portion of stove and the inside roof of the outer cover, the outer cover is open without smoke evacuation, on the gas cleaning channel
Hermetically it is equipped with water purification installation, electronic purification device and power plant, wherein
Include atomization chamber, aqueous vapor disengagement chamber and water body chamber, the input port of the water purification installation in the water purification installation
It is connected to the entrance of the atomization chamber, atomizer, the outlet of the atomization chamber and the aqueous vapor point is installed in the atomization chamber
It is connected to from chamber, the pipeline that the atomizer is connected to the endoceliac water body of the water is equipped with water pump, and the water body chamber is for holding
The liquid of atomization sedimentation is set, the aqueous vapor disengagement chamber is also connected to the delivery outlet of the water purification installation；
Include electrostatic field purifier and photodissociation purifier, the electrostatic field purifier in the electronic purification device
For charged to flue gas, the photodissociation purifier is for flue gas described in photodissociation, redox；
The power plant conveys the flue gas for negative-pressure ward, so that the flue gas fills followed by the Water warfare
It sets and the electronic purification device.
Preferably, the crest welder includes smoke outlet after stokehold smoke outlet and stove, and two of the water purification installation described in one
Input port is hermetically connected to smoke outlet after the stokehold smoke outlet and the stove respectively, and two of the water purification installation described in one are defeated
Outlet is hermetically connected to the input port of the electronic purification device described in two respectively.
Preferably, in the electronic purification device, the electrostatic field purifier includes anode plate and cathode plate, with
In formation electrostatic field；The photodissociation purifier includes nano-photocatalyst and photodissociation, photocatalysis ultraviolet radiator, the nanometer
Photochemical catalyst is matched with the ultraviolet radiator.
Preferably, the water purification installation further includes a nanometer water generator, and the endoceliac water body of water includes nanometer water,
The nanometer water generator is used to the endoceliac water body of the water being converted to the nanometer water.
Preferably, in the electronic purification device further include activated carbon and/or titanium net filter device, the activated carbon
And/or titanium net filter device is fixedly arranged on by the input port of the electronic purification device and/or delivery outlet end.
Preferably, further include scaling powder recycling device, be installed on the welding intracavitary by outer end of the soldering furnace.
Preferably, the electronic purification device and the water purification installation are fixedly arranged in the smokeless crest welder.
The smoke multistage purifier of the smokeless crest welder of the utility model leads to for the flue gas generated in crest welder
The multistage purification for crossing water purification installation and electronic purification device, by flue gas harmful substance and gas properly green, without public affairs
Evilization processing, can realize the effect of green smokeless emission, be conducive in the crest welder course of work to the guarantor of product and personnel
Shield is conducive to the raising of welding quality, is conducive to the improvement of staff's operating environment, the more conducively protection of atmospheric environment, no mist-covered waters
Peak welding machine can realize the effect of thoroughly processing harmful smoke, the external smokeless of crest welder, simple, convenient, green
Environmental protection.
Description of the drawings
Below with smokeless reflow machine embodiment be reference, with reference to the drawings and specific embodiments to the utility model make into
One step is described in detail.
Fig. 1 is existing reflow machine structural schematic diagram；
Fig. 2 is the smokeless reflow machine structural schematic diagram of the utility model embodiment；
Fig. 3 is the gas cleaning flow diagram of the smokeless reflow machine of the utility model embodiment；
Fig. 4 is the electronic purification device structure and gas flow schematic diagram of the smokeless reflow machine of the utility model embodiment；
Fig. 5 is the water purification installation structural schematic diagram of the smokeless reflow machine of the utility model embodiment.
Each label corresponds to as follows, 1-PCB entrances, 2- network chains, 3- outer covers, the stokeholds 4- high-temp waste gas guide duct, 5- stoves in figure
High-temp waste gas guide duct afterwards, 6- water purification installations, 7-PCBA are exported, the stokeholds 8- suction apparatus, and suction apparatus after 9- stoves, 10- is led
Air hose, 11- guide ducts, the stokeholds 12- scaling powder recycling device, scaling powder recycling device after 13- stoves, the first atomizers of 14-,
The second atomizers of 15-, the second atomizers of 16-, the first atomizers of 17-, 181- atomization chambers, 182- aqueous vapor disengagement chambers,
183- water body chambers, gas after 19- purifications, gas after 20- purifications, 21- guide ducts, 22- guide ducts, 23- water pumps, 24- nanometer waters,
25- nanometers of water generators, 26- exhaust fans, 27- exhaust fans, 28- filter screens, 29- electronic purification devices, 30- electric purifications dress
It sets.
Specific implementation mode
It is below reference with smokeless reflow machine embodiment, the utility model is carried out in conjunction with attached drawing and embodiment
Further description：
As shown in Figure 1, existing reflow machine is to the processing mode of flue gas, go out respectively close to PCB entrances 1 and PCBA
The inside top of welding chamber at mouth 7 is provided with smoke outlet, and outer cover 3 is located at outside soldering furnace, plays the role of similar flue, so that
The flue gas generated when welding is discharged from smoke outlet, and the exhaust outlet at PCB entrances 1 is provided with stokehold high-temp waste gas guide duct 4,
High-temp waste gas guide duct 5 follows net in use, PCB is placed on network chain 2 after exhaust outlet at the outlets PCBA 7 is provided with stove
Chain 2 moves, and sequentially passes through preheating zone, permanent hot-zone, reflow area and the cooling zone of welding intracavitary, and is come out from the outlets PCBA 7.
Existing reflow machine shown in FIG. 1 is combined to the smoke multistage purifier of the utility model below, is obtained
A kind of implementation of smokeless reflow machine is described in detail.
A kind of smokeless reflow machine, including reflow machine, as shown in Figures 2 and 3, stokehold high-temp waste gas guide duct 4 and stove
High-temp waste gas guide duct 5 is removed afterwards, and suction apparatus 9 after difference instead stokehold suction apparatus 8 and stove, outer cover 3 is not
It needs smoke evacuation to be open again, is accordingly sealed or replaces, is i.e. the outer cover without smoke evacuation opening, to prevent flue gas excessive, and promote shape
At the access of internal circularly purifying flue gas.After stokehold suction apparatus 8 and stove the input port of suction apparatus 9 respectively with above-mentioned smoke outlet
Connection, the delivery outlet of stokehold suction apparatus 8 are connected to the first input port of water purification installation 6 by guide duct 10, are sucked after stove
The delivery outlet of device 9 is connected to by guide duct 11 with the second input port of water purification installation 6.First output of water purification installation 6
Mouth is by electronic purification device 29, then by guide duct 21, the second delivery outlet of water purification installation 6 passes through electronic purification device
30, then by guide duct 22, the gas after purified treatment is recirculated back in outer cover 3.First delivery outlet of water purification installation 6
It is provided with exhaust fan 26 on electronic purification device 29, then the pipeline that is connected to by guide duct 21, the second of water purification installation 6 is defeated
It is provided with exhaust fan 27 on outlet and electronic purification device 30, then the pipeline that is connected to by guide duct 22, together with reference to figure 5, only
Gas 19 is discharged by exhaust fan 26 from the exhaust outlet of guide duct 21 after change, after purification gas 20 by exhaust fan 27 from guide duct
22 exhaust outlet discharge.Exhaust fan conveys flue gas as power plant, for negative-pressure ward, so that flue gas fills followed by sucking
It sets, water purification installation and electronic purification device, filter screen 28 is preferably provided at the input port of exhaust fan, setting is logical in gas cleaning
The quantity of exhaust fan on road can determines according to actual conditions, specifically in favor of uniform effective purification of flue gas subject to.
Above-mentioned each pipeline connectivity part should all be hermetically connected to, outer when preventing flue gas from being purified in gas cleaning channel
It overflows, so that flue gas is thoroughly purified, the pass purification of suction apparatus 9 being arranged conducive to flue gas after stokehold suction apparatus 8 and stove.
That is, when implementing, the flue gas generated in welding process should effectively manage, it is unified successively by suction apparatus,
It and after the purification of water purification installation and electronic purification device, can be discharged, preferably reduce exchanging as far as possible with ambient atmos,
Purified gas is reused, with circularly purifying flue gas, reaches best clean-up effect with few gas flow.
Together refering to what is shown in Fig. 4, electronic purification device 29 is identical with 30 structure of electronic purification device, inside include it is quiet
Electric field purifier and photodissociation purifier, electrostatic field purifier be used for flue gas it is charged, photodissociation purifier for photodissociation,
Redox flue gas.Electrostatic field purifier can be implemented in a manner of anode plate and cathode plate, for forming electrostatic field, between electrode
Negative ions and electronics collide and charged, and the grit for taking electronics is close with opposite electrode under electric field action and be adsorbed on
It is purified on opposite electrode；Photodissociation purifier can be matched with nano-photocatalyst and photodissociation, photocatalysis with ultraviolet radiator
Mode is implemented.And specifically, it is preferable to the ultraviolet light generated by nanometer photodissociation ultraviolet radiator, the oxygen molecule decomposed in air generates trip
From oxygen and ozone, oxidation reaction is carried out using Strong oxdiative feature and the cigarette of ozone, gas, can deodorization remove peculiar smell.Nano-photocatalyst
Under nanometer photodissociation lamp specific wavelength illumination, high energy particle is generated, there is Strong oxdiative reducing power after having an effect with oxygen and water,
Flue gas pollutant is directly resolved into harmless odorless gas, it can also deodorization and sterilization.
The cleaning principle of electronic purification device is：Under high voltage electric field effect, all kinds of cigarettes, qi leel are charged, are passing through
Electric field, which generates a large amount of anion, can sterilize the most of peculiar smell of removal.Free oxygen is generated using the oxygen molecule decomposed in gas, i.e.,
Active oxygen makes the pollutant in free state because of the negative ions imbalance entrained by free oxygen so need to be combined with oxygen molecule
Molecular oxidation is combined into that small molecule is harmless or the compound of low evil.Redox reaction is carried out using relevant catalyst；With
High energy UV ultraviolet beam and catalyst carry out collaboration to foul gas and decompose oxidation reaction, make gaseous matter gas Degradation and Transformation at
Low molecular compound, water and carbon dioxide thoroughly achieve the purpose that deodorization and kill bacterium.
When it is implemented, electrostatic field purifier and photodissociation purifier can be carried out at the same time the purification of flue gas, or according to
Secondary progress preferably passes through electrostatic field purifier successively and photodissociation purifier is purified.In electrostatic field purifier and light
Gas before or after solution purifier is purified preferably is purified through activated carbon and/or titanium net purifier, activated carbon and/
Or titanium net purifier is preferably disposed in electronic purification device, is preferably fixedly arranged on by the input port of electronic purification device and/or defeated
Outlet end.
Together refering to what is shown in Fig. 5, in water purification installation 6, including atomization chamber 181, aqueous vapor disengagement chamber 182 and water body chamber
183, the first input port and the second input port of water purification installation 6 are connected to the entrance of atomization chamber, wherein in the first atomization chamber
First atomizer 14 and the second atomizer 15 are installed, the first atomizer 17 and the second mist are installed in the second atomization chamber
Change nozzle 16.For atomization chamber for being adequately atomized to the gas of sucking, the number of atomization is preferably 2 times or more, atomization
The outlet of chamber is connected to aqueous vapor disengagement chamber 182, and the pipeline that atomizer is connected to the water body in water body chamber 183 is equipped with water pump
23, liquid of the water body chamber 183 for accommodating atomization sedimentation, aqueous vapor disengagement chamber 182 is located at the top of water body chamber 183, so that atomization
Moisture afterwards settles as far as possible, and falls to water body chamber 183, and aqueous vapor disengagement chamber 182 also connects with the delivery outlet of water purification installation
It is logical.In use, water pump 23 starts, water body is pumped out into atomization from atomizer, so that residue and nuisance in input gas
Matter with contact with moisture, and is fallen in the water body in water body chamber 183 under the effect of gravity as far as possible.
Atomizer can also be transformed to the various forms of atomizers such as spray boom shape, water pump can also equivalents be to realize
Other device forms of same effect, also in claimed range.
Water purification installation 6 preferably further includes nanometer water generator 25, and the water body in water body chamber 183 includes nanometer water 24, is received
Rice water generator 25 is used to the endoceliac water body of water being converted to nanometer water, cigarette, gas, grit under the action of atomized water twice,
Residue grit is set to sink in nanometer water, the nanometer water after atomization can more thoroughly purify the residual decomposed in atomization intracavity gas
Object and harmful substance, the nanometer water in water body chamber 183 can more thoroughly purify the residue and nuisance for decomposing and falling in water body
Matter.Water, gas are after aqueous vapor disengagement chamber 182 is detached, and gas passes through electronic purification device 29 and electronic purification device after purification
30 again purify after again flow into furnace body.
The exhaust outlet of the gas outlet of guide duct 21 and guide duct 22, i.e. smoke multistage purifier is preferably attached to soldering furnace
External wall of upper portion and the inside roof of outer cover between, gas outlet is preferably evenly arranged along soldering furnace extending direction.The structure can make
The high-temperature flue gas generated in welding process carries out sufficient convection current with by purification gas, while can also play one to high-temperature gas
Fixed cooling effect, while being also conducive to the circularly purifying to high-temperature flue gas, the delay of flue gas in outer cover is avoided, and then realize reflux
The effect of welding machine whole process smokeless.
A kind of smokeless welding machine, on the basis of above-mentioned smokeless reflow machine embodiment, above-mentioned reflow machine can convert
For crest welder, crest welder include outer cover, the soldering furnace in outer cover and smoke outlet or other forms include outer cover,
The welding machine of soldering furnace and smoke outlet in outer cover, when it is implemented, the implementation of reflow machine embodiment is can refer to, certainly,
Smoke outlet should hermetically be connected to the air inlet of smoke multistage purifier, and outer cover is open without smoke evacuation, specific electric purification
The fixed form of device and water purification installation and position can be according to the concrete form of welding machine, sides installation fixed difficulty or ease, used
Just angularly consider determination, be preferably fixed as one with welding machine, with easy to use and movement, do not limited by place to use
System.Certain soldering furnace can also equivalents be to generate other device forms of welding machine flue gas, also in the range being claimed.
When smokeless welding machine is implemented in a manner of reflow machine or crest welder, welding machine includes discharging fume after stokehold smoke outlet and stove
When mouth, two input ports of a preferably water purification installation are hermetically connected to smoke outlet after stokehold smoke outlet and stove respectively, and a water is net
Disguise two delivery outlets set hermetically to be connected to the input port of two electronic purification devices respectively, which only needs that a water is arranged
Purifier simplifies the structure of purifier, is conducive to adapt to implementation when smoke outlet is multiple.Water purification installation and electricity
The quantity of sub- purifier can determines according to actual conditions, the quantity of respective input port and delivery outlet can also accordingly into
Row transformation.Preferably further include scaling powder recycling device when smokeless welding machine is implemented in a manner of reflow machine or crest welder, peace
The welding intracavitary by outer end loaded on soldering furnace specifically can refer in Fig. 2 and help weldering after stokehold scaling powder recycling device 12 and stove
The installation position of agent retracting device 13 and mode.When smokeless welding machine is implemented in a manner of reflow machine or crest welder, electronics is net
Makeup, which is set, to be preferably fixedly arranged on water purification installation in smokeless welding machine.
When smokeless welding machine is implemented in a manner of crest welder, the air inlet of smoke multistage purifier can with outside crest welder
The smoke outlet of spraying fume extractor and soldering furnace fume extractor in cover is hermetically connected to.Certainly, above-mentioned smoke outlet can also become
It is changed to and is arranged outside outer cover, also in the range of the requires of the utility model is protected.
On the basis of above-mentioned smoke multistage purifier, a kind of gas cleaning for crest welder of the utility model
Method includes the following steps：S1 carries out flue gas by water process, so that flue gas is atomized；S2, treated flue gas into
Row aqueous vapor detaches；S3, to treated that flue gas is carried out through electrostatic field through S1 and S2, so that the flue gas is charged；And S4,
To treated that flue gas carries out the effect by nano-photocatalyst and ultraviolet light through S3, photodissociation, redox are carried out to flue gas.
This method purification efficiency is high, and clean-up effect is more preferable, and it is simple, conveniently, it is environmentally protective, when it is implemented, it is preferred that with reference to Fig. 3 institutes
Show that smokeless reflow machine implements the method and step that gas cleaning is handled.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of the appended claims for the utility model.
Illustrative description has been carried out to the utility model patent above, it is clear that the realization of the utility model patent not by
The limitation of aforesaid way, if the various improvement of the methodology and technical solution progress of the utility model patent are used, or
It is not improved that the design of the utility model patent and technical solution are directly applied into other occasions, in the utility model
In protection domain.
Claims (7)
1. a kind of smokeless crest welder, including crest welder and smoke multistage purifier, the crest welder include outer cover, position
In soldering furnace and smoke outlet in the outer cover, the smoke multistage purifier includes air inlet and exhaust outlet, the air inlet
Mouth is connect by gas cleaning channel with the exhaust outlet, which is characterized in that the smoke outlet hermetically connects with the air inlet
Logical, the exhaust outlet is installed between the external wall of upper portion of the soldering furnace and the inside roof of the outer cover, the outer cover without
Smoke evacuation is open, and water purification installation, electronic purification device and power plant are hermetically equipped on the gas cleaning channel, wherein
Include atomization chamber, aqueous vapor disengagement chamber and water body chamber in the water purification installation, the input port of the water purification installation and institute
The entrance connection of atomization chamber is stated, atomizer, the outlet of the atomization chamber and the aqueous vapor disengagement chamber are installed in the atomization chamber
Connection, the pipeline that the atomizer is connected to the endoceliac water body of the water are equipped with water pump, and the water body chamber is for housing mist
Change the liquid of sedimentation, the aqueous vapor disengagement chamber is also connected to the delivery outlet of the water purification installation；
Include electrostatic field purifier and photodissociation purifier in the electronic purification device, the electrostatic field purifier is used for
Charged to flue gas, the photodissociation purifier is for flue gas described in photodissociation, redox；
The power plant conveys the flue gas for negative-pressure ward so that the flue gas followed by the water purification installation and
The electronic purification device.
2. smokeless crest welder according to claim 1, which is characterized in that the crest welder include stokehold smoke outlet and
Two input ports of smoke outlet after stove, the water purification installation described in one are close with smoke outlet after the stokehold smoke outlet and the stove respectively
Feud is connected to, two delivery outlets of the water purification installation described in one respectively with the input port of the electronic purification device described in two hermetically
Connection.
3. smokeless crest welder according to claim 1, which is characterized in that described quiet in the electronic purification device
Electric field purifier includes anode plate and cathode plate, for forming electrostatic field；The photodissociation purifier includes that nanometer light is urged
Agent and photodissociation, photocatalysis ultraviolet radiator, the nano-photocatalyst are matched with the ultraviolet radiator.
4. smokeless crest welder according to claim 1, which is characterized in that the water purification installation further includes nanometer water hair
Raw device, the endoceliac water body of water includes nanometer water, and the nanometer water generator is used to turn in the endoceliac water body of the water
It is changed to the nanometer water.
5. smokeless crest welder according to claim 1, which is characterized in that further include living in the electronic purification device
Property charcoal and/or titanium net filter device, the activated carbon and/or titanium net filter device are fixedly arranged on by the defeated of the electronic purification device
Entrance and/or delivery outlet end.
6. smokeless crest welder according to claim 1, which is characterized in that further include scaling powder recycling device, installation
In the welding intracavitary by outer end of the soldering furnace.
7. smokeless crest welder according to claim 1, which is characterized in that the electronic purification device and the Water warfare
Device is fixedly arranged in the smokeless crest welder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721739659.4U CN207822772U (en) | 2017-12-14 | 2017-12-14 | A kind of smokeless crest welder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721739659.4U CN207822772U (en) | 2017-12-14 | 2017-12-14 | A kind of smokeless crest welder |
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| CN207822772U true CN207822772U (en) | 2018-09-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109316922A (en) * | 2017-12-14 | 2019-02-12 | 深圳市科延机电有限公司 | A kind of smokeless crest welder |
| WO2021062943A1 (en) * | 2019-09-30 | 2021-04-08 | 叶志行 | Environmentally friendly circuit board production apparatus |
-
2017
- 2017-12-14 CN CN201721739659.4U patent/CN207822772U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109316922A (en) * | 2017-12-14 | 2019-02-12 | 深圳市科延机电有限公司 | A kind of smokeless crest welder |
| WO2021062943A1 (en) * | 2019-09-30 | 2021-04-08 | 叶志行 | Environmentally friendly circuit board production apparatus |
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