CN105067505A - Automatic concentration control sulfur dioxide test box - Google Patents
Automatic concentration control sulfur dioxide test box Download PDFInfo
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- CN105067505A CN105067505A CN201510472055.7A CN201510472055A CN105067505A CN 105067505 A CN105067505 A CN 105067505A CN 201510472055 A CN201510472055 A CN 201510472055A CN 105067505 A CN105067505 A CN 105067505A
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Abstract
The invention relates to an automatic concentration control sulfur dioxide test box. The test box comprises a box body (1), the front end surface of the box body (1) is provided with a box door (2), a work chamber (4) is arranged in the box body (1), a sample rack (5) is installed on the inner wall of the work chamber (4), the test box also comprises an inflation system, a concentration detection system and a heating system, the inflation system is connected to an inflation port (6) of the work chamber (4) by a gas-guide tube, the concentration detection system is connected to a detection port (7) and a gas return port (8) by gas-guide tubes and are between the detection port (7) and the gas return port (8), the rear end of the work chamber (4) is provided with stirring blades (9), the stirring blades (9) are connected to an output end of a stirring motor (10), and the inflation system, the concentration detection system, the heating system and the stirring motor (10) are respectively connected to an electrical system by lines. The automatic concentration control sulfur dioxide test box can display and control a sulfur dioxide concentration in the box in real time, ensures uniformity of sulfur dioxide in air in the box, produces real and reliable test results and has a high automation degree.
Description
[technical field]
The present invention relates to environmental test Instrument technology field, specifically a kind of concentration automatically controls sulfurous acid gas test case.
[background technology]
Sulfur dioxide gas is due to the activity of its molecule, react can generate dilute sulfuric acid with water, strong corrosivity is had to electric product and various industrial goods, so carry out sulfurous acid gas test to some specific industrial goods, carry out sulphuric dioxide accelerated corrosion test, the problem place of product can be found early, to improve and to seek the material of renewal.Can meet sulfur dioxide corrosion, reach standard above-mentioned requirements, thus carrying out sulfurous acid gas test with chamber is also very effective means.At present, the main flow salt fog cabinet on market in use mainly has the following disadvantages:
(1) due to the difficulty of gasmetry, sulphuric dioxide is on the market converted by volume ratio substantially, is filled with a certain amount of sulphuric dioxide tests toward chamber;
(2), during insufflation gas, be that slack barrel liquid level target declines by observing in slack barrel substantially, read insufflation gas number, more extensive;
(3) due to be disposable insufflation gas in chamber, after chamber runs a period of time, gas and the water of sulphuric dioxide react, and create certain clear consumption, but user can not understand in real time, can not reflect testing requirements more realistically;
(4) owing to being manual insufflation gas, automated procedures are not high, meanwhile, because the amount be once filled with is many, is only suitable for the occasion that concentration is higher, if will test the concentration of PPM level, then substantially cannot realizes;
(5) conventional sulphuric dioxide, owing to being by gas deadweight during insufflation gas, diffusion of carrying out sinking, distribution of gas non-uniform phenomenon may be there is.
[summary of the invention]
Object of the present invention is exactly will solve above-mentioned deficiency and provide a kind of concentration automatically to control sulfurous acid gas test case, can show in real time and sulfur dioxide concentration in control box, ensure that the homogeneity of air sulphuric dioxide in case, make test effect more true and reliable, automaticity is very high.
A kind of concentration automatically of design controls sulfurous acid gas test case for achieving the above object, comprise casing 1, described casing 1 front end face is provided with chamber door 2, be tightly connected between described casing 1 and chamber door 2, described chamber door 2 is provided with view window 3, operating room 4 is provided with in described casing 1, described operating room 4 inwall is equipped with symmetrical specimen holder 5, also comprise gas charging system, concentration detection system and heating system, described gas charging system connects the inflation inlet 6 of operating room 4 by wireway, described concentration detection system is connected between the detection mouth 7 of operating room and gas returning port 8 by wireway, stirring blades 9 is equipped with in rear end in described operating room 4, described stirring blades 9 is connected with the output terminal of stirring motor 10, described gas charging system, concentration detection system, heating system, stirring motor 10 is respectively by connection electrical system.
Described gas charging system comprises air drum 11, aspiration pump 1 and sulphuric dioxide steel cylinder 13, described sulphuric dioxide steel cylinder 13 gas outlet connects air drum 11 air intake opening by wireway, described air drum 11 gas outlet connects aspiration pump 1 air intake opening by wireway, described aspiration pump 1 gas outlet connects the inflation inlet 6 of operating room 4 by wireway, described sulphuric dioxide steel cylinder 13 gas outlet place is provided with reduction valve 14, wireway between described reduction valve 14 and air drum 11 is provided with solenoid valve 15, described solenoid valve 15, aspiration pump 1 is respectively by connection electrical system.
Described concentration detection system comprises cooling coil 16, gas-liquid separator 17, aspiration pump 2 18 and sulphuric dioxide probe 19, the detection mouth 7 of described operating room 4 connects cooling coil 16 by wireway, the other end of described cooling coil 16 is connected with the air intake opening of gas-liquid separator 17, the gas outlet of described gas-liquid separator 17 connects aspiration pump 2 18 air intake opening by wireway, described aspiration pump 2 18 gas outlet connects sulphuric dioxide by wireway and to pop one's head in 19 air intake openings, described sulphuric dioxide 19 gas outlets of popping one's head in connect the gas returning port 8 of operating room 4 by wireway, the liquid outlet of described gas-liquid separator 17 is connected with drainpipe 20, described gas-liquid separator 17, aspiration pump 2 18, sulphuric dioxide probe 19 is respectively by connection electrical system.
Described heating system comprises tank 21 and electric heater 22, described electric heater 22 adopts far infrared nickel-chrome to heat at a high speed electric heater, described tank 21 is placed in the below of operating room 4 in casing 1, described electric heater 22 is arranged in tank 21, described electric heater 22 is arranged on tank 21 inwall, and described electric heater 22 is by connection electrical system.
Described casing 1 has exhausr port, and described exhaust ports is provided with activated charcoal soda ash filtration unit, and the described activated charcoal soda ash filtration unit other end is connected with air exhauster.
Be provided with temperature sensing sensor in described casing 1, described temperature sensing sensor adopts PT100 platinum resistance temperature detector.
Described casing 1 comprises outer container and inner bag, and described casing 1 adopts silicone rubber seal to be connected with between chamber door 2, and described outer container, inner bag, chamber door 2 all adopt PP to strengthen hard plastic board and make.
The side of described casing 1 is provided with regulator cubicle 23, described regulator cubicle 23 front is provided with control panel 24, described control panel 24 is provided with Ethernet interface, in described regulator cubicle 23, top is provided with switchboard 25, described air drum 11 is placed in rear portion in regulator cubicle 23, described casing 1 is integral type structure with regulator cubicle 23, and described electrical system is by the button control zone on line connection control panel 24.
Described wireway adopts silicone tube, and the air exhauster of described exhaust ports adopts centrifugal plastic blower fan.
Described heating system is connected in parallel with gas charging system, concentration detection system respectively.
Compared with the existing technology, tool has the following advantages in the present invention:
(1) have employed special concentration of SO 2 gas detection probe, thus can show in real time and sulfur dioxide concentration in control box;
(2) import touch screen controller selected by controller, focused on the operating experience of user, carried the historical data recording function of 600 days with Time Controller itself, can review data and the curve of test easily;
(3) due to gas be filled with time, first dilute through an air drum, carry out bleeding through small-sized aspiration pump one again and be charged into interior case, so the sulphuric dioxide being at every turn filled with interior case can control quite accurate, thus there is not overshoot phenomenon, the gas simultaneously having possessed PPM rank controls and measures;
(4), during gas detect, first have passed through a set of accurate coil pipe and cool, carry out gas-water separation, arrive probe again, thus ensure that the reliability of probe work, simultaneously, also allow for chamber and can do various different humiture, and the life-span of probe can not be affected;
(5) interior case is equipped with agitation fan, when gas is filled with interior case, and starting fan, internal case air stirs, thus ensure that the homogeneity of interior case air sulphuric dioxide, makes test effect more true and reliable;
(6) because controller is band programmable function, can do the test of variable concentrations, various alarm history record, automatic water-replenishing device continuously, equipment can be operated by unmanned continuously, and automaticity is very high.
[accompanying drawing explanation]
Fig. 1 is front outer portion structural representation of the present invention;
Fig. 2 is front of the present invention inner structure schematic diagram
Fig. 3 is left side structure schematic diagram of the present invention;
Fig. 4 is right side structure schematic diagram of the present invention;
Fig. 5 is plan structure schematic diagram of the present invention;
Fig. 6 is principle schematic of the present invention;
In figure: 1, casing 2, chamber door 3, view window 4, operating room 5, specimen holder 6, inflation inlet 7, detection mouth 8, gas returning port 9, stirring blades 10, stirring motor 11, air drum 12, aspiration pump 1, sulphuric dioxide steel cylinder 14, reduction valve 15, solenoid valve 16, cooling coil 17, gas-liquid separator 18, aspiration pump 2 19, sulphuric dioxide probe 20, drainpipe 21, tank 22, electric heater 23, regulator cubicle 24, control panel 25, switchboard.
[embodiment]
Below in conjunction with accompanying drawing, following further illustrating is done to the present invention:
As shown in drawings, the present invention includes: casing 1, casing 1 front end face is provided with chamber door 2, be tightly connected between casing 1 and chamber door 2, chamber door 2 is provided with view window 3, observation experiment sample tested situation when being convenient to test, operating room 4 is provided with in casing 1, operating room 4 inwall is equipped with symmetrical specimen holder 5, also comprise gas charging system, concentration detection system and heating system, gas charging system connects the inflation inlet 6 of operating room 4 by wireway, concentration detection system is connected between the detection mouth 7 of operating room and gas returning port 8 by wireway, stirring blades 9 is equipped with in rear end in operating room 4, stirring blades 9 is connected with the output terminal of stirring motor 10, gas charging system, concentration detection system, heating system, stirring motor 10 is respectively by connection electrical system.
Wherein, gas charging system comprises air drum 11, aspiration pump 1 and sulphuric dioxide steel cylinder 13, sulphuric dioxide steel cylinder 13 gas outlet connects air drum 11 air intake opening by wireway, air drum 11 gas outlet connects aspiration pump 1 air intake opening by wireway, aspiration pump 1 gas outlet connects the inflation inlet 6 of operating room 4 by wireway, sulphuric dioxide steel cylinder 13 gas outlet place is provided with reduction valve 14, wireway between reduction valve 14 and air drum 11 is provided with solenoid valve 15, and solenoid valve 15, aspiration pump 1 are respectively by connection electrical system.Concentration detection system comprises cooling coil 16, gas-liquid separator 17, aspiration pump 2 18 and sulphuric dioxide probe 19, the detection mouth 7 of operating room 4 connects cooling coil 16 by wireway, the other end of cooling coil 16 is connected with the air intake opening of gas-liquid separator 17, the gas outlet of gas-liquid separator 17 connects aspiration pump 2 18 air intake opening by wireway, aspiration pump 2 18 gas outlet connects sulphuric dioxide by wireway and to pop one's head in 19 air intake openings, sulphuric dioxide 19 gas outlets of popping one's head in connect the gas returning port 8 of operating room 4 by wireway, the liquid outlet of gas-liquid separator 17 is connected with drainpipe 20, gas-liquid separator 17, aspiration pump 2 18, sulphuric dioxide probe 19 is respectively by connection electrical system.
The present invention adopts inner bag water tank type type of heating, and namely shallow mortise heating rises wet method, this type of heating quick heating, uniformity of temperature profile, heating system comprises tank 21 and electric heater 22, electric heater 22 adopts far infrared nickel-chrome to heat at a high speed electric heater, tank 21 is placed in the below of operating room 4 in casing 1, electric heater 22 is arranged in tank 21, electric heater 22 is arranged on tank 21 inwall, electric heater 22 is by connection electrical system, and heating system respectively with gas charging system, concentration detection system is connected in parallel, namely heating system is complete autonomous system, do not affect sulfurous acid gas test and operation circuit, its temperature controls output power and calculates by micro computer, to reach the electricity consumption benefit of high precision and high-level efficiency.
In the present invention, casing 1 comprises outer container and inner bag, silicone rubber seal is adopted to be connected between casing 1 with chamber door 2, prevent gas excessive, outer container, inner bag, chamber door 2 all adopt import PP to strengthen hard plastic board and make, and any surface finish is smooth, and ageing-resistant, corrosion-resistant, be provided with temperature sensing sensor in casing 1, temperature sensing sensor adopts PT100 platinum resistance temperature detector; The side of casing 1 is provided with regulator cubicle 23, regulator cubicle 23 front is provided with control panel 24, control panel 24 is provided with 10M/100M Ethernet interface, the function such as real-time monitoring, history curve playback, program editing, FTP uploads download, historical failure is checked, long-range definite value/programmed control can be supported, there is powerful network monitoring, net control function, even if not on machine side, also can true-time operation on computers, monitoring, the ruuning situation of equipment is had at fingertips; In regulator cubicle 23, top is provided with switchboard 25, and air drum 11 is placed in rear portion in regulator cubicle 23, and casing 1 and regulator cubicle 23 are integral type structure, and electrical system is by the button control zone on line connection control panel 24; Casing 1 has exhausr port, and exhaust ports is provided with activated charcoal soda ash filtration unit, and the activated charcoal soda ash filtration unit other end is connected with air exhauster, and wireway adopts silicone tube, and the air exhauster of exhaust ports adopts centrifugal plastic blower fan.
As shown in Figure 6, left side is inflation flow process, its principle of work is: the sulfur dioxide gas in sulphuric dioxide steel cylinder is after reduction valve step-down, solenoid valve is opened (automatically being controlled by controller), makes a small amount of sulfur dioxide gas enter in air drum, dilutes, become the mixed gas of very low concentrations, if concentration is on the low side in case, controller then controls aspiration pump one to carry out being evacuated in chamber, thus reaches the effect increasing concentration.Right side is testing process, its principle of work is: aspiration pump two works always, in extracting, the gas of case, cools through cooling coil, makes gas produce condensation, then through gas-liquid separator, product aqueous vapor is separated, and gas carries out sulfur dioxide concentration probe through aspiration pump two, carries out analysis and detects, and then returning interior case, the gas concentration completing one-period detects.
Temperature range of the present invention is room temperature+15 DEG C ~ 50 DEG C, and temperature uniformity is ± 2 DEG C, and temperature fluctuation is ± 0.5 DEG C, and gas producing method adopts steel cylinder method, and concentration of SO 2 gas is 0.1 ~ 1% (percent by volume); During its concentration controls, gas enters automatic stirring behind operating room, and wireway adopts corrosion-resistant silicone tube to connect, and waste discharge blower fan adopts centrifugal plastic blower fan concentration to control, and waste gas adopts activated charcoal to add soda ash and filters again by outside air exhauster discharge chamber; Its protection system comprises integral device timing, overtemperature prote, short-circuit protection, lack of water are reported to the police, and electric leakage, runs instruction, the protection such as auto stop after fault alarm.
In the present invention, display adopts import brand control instrument, and the 7 inches high color liquid crystal touch display screens of Islamic, can monitor, in real time with supervisory control device real time data, signaling point state and actual output state; Curve record function comprises: (1) controller can store historical data in 600 days (under 24 hours running statuses, more than logging interval 1min, when humiture data record simultaneously), and can historical data curve in the playback control of uploading; (2) under machine down state, can insert USB flash disk at any time derives or uploading data, and checks or change into EXCEL form by deriving the file come at computer by software presented with machine; (3) instruments and outfit USB port, directly can pass through the preview of port driver mini-printer and printing.Its control mode can adopt thermal equilibrium conditioning mode, and Temperature and Humidity Control adopts P.I.D+S.S.R system same frequency road cooperation control, has the function of auto computing, humiture change condition can be revised immediately, make Temperature and Humidity Control more precise and stable.
The present invention has: point temperatures and slope set-up function; Keep, jump section, standby and two groups of time signal output functions; Temperature displaying value debugging functions; Temperature sensing sports school orthofunction; Compressor stops function automatically; The reservation starting/stopping function of motion; Charged timeout function; Current failure memory function, when after power-off, routine data memory can keep 6 months; Fault alarm and reason, process prompt facility; Power-off protection function; Calendar timing function (automatically start and automatically out of service); Self-diagnostic function.
The present invention, by the restriction of above-mentioned embodiment, change, the modification done, substitutes, combines, simplifies under other any does not deviate from Spirit Essence of the present invention and principle, all should be equivalent substitute mode, is included within protection scope of the present invention.
Claims (10)
1. an automatic concentration controls sulfurous acid gas test case, comprise casing (1), described casing (1) front end face is provided with chamber door (2), be tightly connected between described casing (1) and chamber door (2), described chamber door (2) is provided with view window (3), operating room (4) is provided with in described casing (1), symmetrical specimen holder (5) described operating room (4) inwall is equipped with, it is characterized in that: also comprise gas charging system, concentration detection system and heating system, described gas charging system connects the inflation inlet (6) of operating room (4) by wireway, described concentration detection system is connected between the detection mouth (7) of operating room and gas returning port (8) by wireway, stirring blades (9) is equipped with in described operating room (4) rear end, described stirring blades (9) is connected with the output terminal of stirring motor (10), described gas charging system, concentration detection system, heating system, stirring motor (10) is respectively by connection electrical system.
2. concentration automatically as claimed in claim 1 controls sulfurous acid gas test case, it is characterized in that: described gas charging system comprises air drum (11), aspiration pump one (12) and sulphuric dioxide steel cylinder (13), described sulphuric dioxide steel cylinder (13) gas outlet connects air drum (11) air intake opening by wireway, described air drum (11) gas outlet connects aspiration pump one (12) air intake opening by wireway, described aspiration pump one (12) gas outlet connects the inflation inlet (6) of operating room (4) by wireway, described sulphuric dioxide steel cylinder (13) gas outlet place is provided with reduction valve (14), wireway between described reduction valve (14) and air drum (11) is provided with solenoid valve (15), described solenoid valve (15), aspiration pump one (12) is respectively by connection electrical system.
3. concentration automatically as claimed in claim 2 controls sulfurous acid gas test case, it is characterized in that: described concentration detection system comprises cooling coil (16), gas-liquid separator (17), aspiration pump two (18) and sulphuric dioxide probe (19), the detection mouth (7) of described operating room (4) connects cooling coil (16) by wireway, the other end of described cooling coil (16) is connected with the air intake opening of gas-liquid separator (17), the gas outlet of described gas-liquid separator (17) connects aspiration pump two (18) air intake opening by wireway, described aspiration pump two (18) gas outlet connects sulphuric dioxide probe (19) air intake opening by wireway, described sulphuric dioxide probe (19) gas outlet connects the gas returning port (8) of operating room (4) by wireway, the liquid outlet of described gas-liquid separator (17) is connected with drainpipe (20), described gas-liquid separator (17), aspiration pump two (18), sulphuric dioxide probe (19) is respectively by connection electrical system.
4. concentration automatically as claimed in claim 3 controls sulfurous acid gas test case, it is characterized in that: described heating system comprises tank (21) and electric heater (22), described electric heater (22) adopts far infrared nickel-chrome to heat at a high speed electric heater, described tank (21) is placed in the below of casing (1) interior operating room (4), described electric heater (22) is arranged in tank (21), described electric heater (22) is arranged on tank (21) inwall, and described electric heater (22) is by connection electrical system.
5. concentration automatically as claimed in claim 4 controls sulfurous acid gas test case, it is characterized in that: (1) has exhausr port with described casing, described exhaust ports is provided with activated charcoal soda ash filtration unit, and the described activated charcoal soda ash filtration unit other end is connected with air exhauster.
6. concentration automatically as claimed in claim 5 controls sulfurous acid gas test case, it is characterized in that: described casing is provided with temperature sensing sensor in (1), and described temperature sensing sensor adopts PT100 platinum resistance temperature detector.
7. concentration automatically as claimed in claim 6 controls sulfurous acid gas test case, it is characterized in that: described casing (1) comprises outer container and inner bag, adopt silicone rubber seal to be connected between described casing (1) with chamber door (2), described outer container, inner bag, chamber door (2) all adopt PP to strengthen hard plastic board and make.
8. concentration automatically as claimed in claim 7 controls sulfurous acid gas test case, it is characterized in that: the side of described casing (1) is provided with regulator cubicle (23), described regulator cubicle (23) front is provided with control panel (24), described control panel (24) is provided with Ethernet interface, in described regulator cubicle (23), top is provided with switchboard (25), described air drum (11) is placed in regulator cubicle (23) interior rear portion, described casing (1) and regulator cubicle (23) are integral type structure, and described electrical system is by the button control zone on line connection control panel (24).
9. concentration automatically as claimed in claim 8 controls sulfurous acid gas test case, it is characterized in that: described wireway adopts silicone tube, and the air exhauster of described exhaust ports adopts centrifugal plastic blower fan.
10. concentration automatically as claimed in claim 9 controls sulfurous acid gas test case, it is characterized in that: described heating system is connected in parallel with gas charging system, concentration detection system respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510472055.7A CN105067505A (en) | 2015-08-04 | 2015-08-04 | Automatic concentration control sulfur dioxide test box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510472055.7A CN105067505A (en) | 2015-08-04 | 2015-08-04 | Automatic concentration control sulfur dioxide test box |
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| CN105067505A true CN105067505A (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510472055.7A Pending CN105067505A (en) | 2015-08-04 | 2015-08-04 | Automatic concentration control sulfur dioxide test box |
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| Country | Link |
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| CN (1) | CN105067505A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106527513A (en) * | 2016-12-29 | 2017-03-22 | 重庆奥海辉龙大数据有限公司 | Gas monitoring system and method |
| CN112611702A (en) * | 2020-11-17 | 2021-04-06 | 健研检测集团有限公司 | Test equipment |
| CN115038322A (en) * | 2022-08-12 | 2022-09-09 | 苏州睿鑫莱机电科技有限公司 | Electromechanical device protection device with built-in dual-channel heat dissipation system |
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| DE29922758U1 (en) * | 1999-12-24 | 2000-02-24 | Liebisch Gmbh & Co Geb | Device for testing the resistance of material samples to sulfuric acid |
| JP2007078524A (en) * | 2005-09-14 | 2007-03-29 | Suga Test Instr Co Ltd | Corrosion testing device |
| CN201935857U (en) * | 2010-12-13 | 2011-08-17 | 中国航空工业集团公司北京航空材料研究院 | Corrosive gas test box |
| CN202021011U (en) * | 2011-04-01 | 2011-11-02 | 东莞市众志检测仪器有限公司 | Filtration and purification device of sulfur dioxide salt mist testing machine |
| CN102680386A (en) * | 2012-06-12 | 2012-09-19 | 上海林频仪器股份有限公司 | Salt-mist corrosion test box |
| CN103969175A (en) * | 2014-05-15 | 2014-08-06 | 上海林频仪器股份有限公司 | Ozone aging test box |
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2015
- 2015-08-04 CN CN201510472055.7A patent/CN105067505A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29922758U1 (en) * | 1999-12-24 | 2000-02-24 | Liebisch Gmbh & Co Geb | Device for testing the resistance of material samples to sulfuric acid |
| JP2007078524A (en) * | 2005-09-14 | 2007-03-29 | Suga Test Instr Co Ltd | Corrosion testing device |
| CN201935857U (en) * | 2010-12-13 | 2011-08-17 | 中国航空工业集团公司北京航空材料研究院 | Corrosive gas test box |
| CN202021011U (en) * | 2011-04-01 | 2011-11-02 | 东莞市众志检测仪器有限公司 | Filtration and purification device of sulfur dioxide salt mist testing machine |
| CN102680386A (en) * | 2012-06-12 | 2012-09-19 | 上海林频仪器股份有限公司 | Salt-mist corrosion test box |
| CN103969175A (en) * | 2014-05-15 | 2014-08-06 | 上海林频仪器股份有限公司 | Ozone aging test box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106527513A (en) * | 2016-12-29 | 2017-03-22 | 重庆奥海辉龙大数据有限公司 | Gas monitoring system and method |
| CN112611702A (en) * | 2020-11-17 | 2021-04-06 | 健研检测集团有限公司 | Test equipment |
| CN115038322A (en) * | 2022-08-12 | 2022-09-09 | 苏州睿鑫莱机电科技有限公司 | Electromechanical device protection device with built-in dual-channel heat dissipation system |
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Application publication date: 20151118 |
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