CN208984511U - A kind of compound salt spray test chamber of programmable high/low temperature - Google Patents
A kind of compound salt spray test chamber of programmable high/low temperature Download PDFInfo
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- CN208984511U CN208984511U CN201821829560.8U CN201821829560U CN208984511U CN 208984511 U CN208984511 U CN 208984511U CN 201821829560 U CN201821829560 U CN 201821829560U CN 208984511 U CN208984511 U CN 208984511U
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Abstract
The utility model relates to salt spray test chamber technical fields, in particular a kind of compound salt spray test chamber of programmable high/low temperature, PID is adjusted including observing and controlling, the observing and controlling adjusts PID and is connected with automatic control center PLC, the automatic control center PLC connection human-computer dialogue touch screen, the long-range monitoring of human-computer dialogue touch screen connection, the automatic control center PLC is connected separately with temperature control system, humidity control system, salt fog generating system, spray cleaning system, water system and Air-conditioning system, the temperature control system, humidity control system is all connected with temperature/humidity sensor, the salt mist system includes brine tank, salt water blowdown valve is connected to by pipeline below the brine tank, peristaltic pump is connected to by pipeline above the brine tank, pass through pipeline connection test case above the peristaltic pump.The utility model can effectively extend the service life of this type component in system, high reliablity by setting, and performance is stablized, the high advantage of Measure Precision.
Description
Technical field
The utility model relates to salt spray test chamber technical field, specially a kind of compound salt spray test of programmable high/low temperature
Case.
Background technique
The compound salt spray test chamber of (domestic or import equipment) during the test and after the test phase currently on the market
The valve member of drainage is closed there is no automatic cleaning and diluting salt crystalline substance deposition mechanism is arranged, is deposited after test after a period of time
Salt crystal on the mechanical motion mechanism of blowdown valve member can be more and more, cause abrasion damage ring to valve member, fit badly gas leakage
Failure rate is higher, while the salt crystal of high concentration is also very large to the metal erosion of valve member.
In conclusion the utility model proposes a kind of compound salt spray test chamber of programmable high/low temperature come improve presently, there are
Problem.
Summary of the invention
The purpose of this utility model is to provide a kind of compound salt spray test chambers of programmable high/low temperature, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the utility model provides the following technical solutions:
A kind of compound salt spray test chamber of programmable high/low temperature, including observing and controlling adjust PID, and the observing and controlling adjusts PID and is connected with
Automatic control center PLC, the automatic control center PLC connection human-computer dialogue touch screen, the long-range monitoring of human-computer dialogue touch screen connection,
The automatic control center PLC be connected separately with temperature control system, humidity control system, salt fog generating system, spray cleaning system,
Water system and Air-conditioning system, the temperature control system, humidity control system are all connected with temperature/humidity sensor, the salt fog
System includes brine tank, is connected to salt water blowdown valve by pipeline below the brine tank, is connected above the brine tank by pipeline
Logical peristaltic pump, by pipeline connection test case, the inside of the chamber is fixed with the first electric heating for the peristaltic pump top,
The bottom of the chamber and it is located on the left of peristaltic pump and is fixedly connected with sewage pipe, the chamber bottom and is located at compacted
The right side of dynamic pump is connected to saturation bucket by pipeline, is fixed with the second electric heating, the saturation bucket bottom inside the saturation bucket
Center blowdown valve is communicated with by pipeline, the bottom of the saturation bucket and be located on the right side of the first blowdown valve and pass through pipe
Road is connected to both air flow modulation needle-valve, the right side of the both air flow modulation needle-valve by pipeline be sequentially communicated the first solenoid valve,
Second solenoid valve and third solenoid valve are communicated with governor valve by pipeline in the second solenoid valve, and the governor valve passes through pipe
Road is connected to door cylinder, and the right side of the third solenoid valve is connected to pneumatic triple piece, the right side of the pneumatic triple piece by pipeline
Connect the first shut-off valve by pipeline, the right side of first shut-off valve is connected to compressed air source by pipeline, the saturation bucket
Bottom and it is located at the left side of blowdown valve by pipeline the 4th solenoid valve of connection, the lower left side of the 4th solenoid valve passes through pipeline
It is connected to the second shut-off valve, the right side of second shut-off valve is connected to deionization water inlet by pipeline, the 4th solenoid valve
Upper left side is connected to cleaning pump by pipeline, and the top of the cleaning pump is connected to the first washer jet by pipeline, and described first is clear
The inside that nozzle is fixed at the first scavenging air valve is washed, first scavenging air valve is fixed in chamber, the cleaning pump
Right side that is upper and being located at the first washer jet is connected to the second washer jet, the second washer jet fixed setting by pipeline
In the inside in the second scavenging air valve, second scavenging air valve is fixedly connected in chamber, fixed above second scavenging air valve
Equipped with ventilating fan, the right side in the cleaning pump and positioned at the second washer jet is connected to third washer jet by pipeline,
The third washer jet is fixed at the inside of bellows, and circulating fan, the three cleanings spray are fixed on the bellows
Below mouth and it is located at the inside of bellows and is fixed with evaporator, the right side of the evaporator and inside for being located at bellows is fixed
Equipped with the second electric heating, the bellows are connected with chamber by air outlet and return air inlet, and the chamber bottom passes through
Pipeline is connected to the capillary that drips, and the top of the capillary that drips passes through pipeline and is connected to the 5th solenoid valve, the 5th solenoid valve
Right side water filter is connected to by pipeline, the right side of the water filter is communicated with water circulating pump and flow valve by pipeline,
The right side of the water circulating pump is connected to water supply tank by pipeline, and the water supply tank is connected to the second blowdown valve, the stream by pipeline
The lower section for measuring valve is connected to balance water box by pipeline, and the balance water box are connected to humidifier, the humidifier connection by pipeline
There are bellows, the evaporator is connected with constant temperature unit.
Preferably, it is that mutually transmission reading and writing data exchanges that observing and controlling, which adjusts PID with the relationship of automatic control center PLC, the automatic control
The relationship of center PLC and human-computer dialogue touch screen is the read-write of mutual send instructions, data storage, calculates analysis, the long-range prison
Control and the relationship of human-computer dialogue touch screen be remotely monitor to human-computer dialogue touch screen carry out information publication, control centre's management,
Local internet building.
Preferably, the model industrial platinum resistance pt100(dry-bulb temperature of the temperature/humidity sensor, corrosion-resistance treatment),
The tri- leaf Roots blower of model ZLS-65W of the circulating fan.
Preferably, the model WT600-4F of the peristaltic pump.
Preferably, the model DRS-18A of the humidifier.
Preferably, first washer jet, the second washer jet are identical with the structure of third washer jet.
Preferably, first solenoid valve, second solenoid valve, third solenoid valve, the 4th solenoid valve and the 5th solenoid valve
Model is identical and is 2W water valve.
Compared with prior art, the utility model has the beneficial effects that
1, it in the utility model, is always integrally formed by equipment by salt fog cabinet pilot system and temperature and humidity environment control unit
The compound salt spray test chamber of formula high/low temperature programmable can also meet while taking into account conventional salt spray test in equipment temperature/humidity
Other task experiments of coverage area.
2, in the utility model, automatic spray wiper mechanism has been specifically designed by mechanical motion mechanism in system, every
When one time salt spray test process terminates, the salt for being diluted by the clear water spray of high pressure and cleaning such device deposition is brilliant,
The service life and system for effectively extending this type component in system are used writes specifically for the equipment running process
Intelligence control program, mould is controlled using the feedback ratio multiplexingization that general salt spray test chamber uses on the market at present by the clients of many years
Block has high reliablity, and performance is stablized, the high advantage of Measure Precision.
3, in the utility model, by salt water atomization plant, using unique design the two poles of the earth air inlet depressurized system than current city
The single-stage gas handling system stability that general salt spray test chamber uses on face is good, and the setting of two-stage decompression system ensures atomization effect
It is uniform and stable.
Detailed description of the invention
Fig. 1 is the compound salt spray test chamber flowage structure schematic diagram of the utility model；
Fig. 2 is the compound salt spray test chamber system principle structural schematic diagram of the utility model.
In figure: 1- observing and controlling adjusts PID, 2- automatic control center PLC, 3- human-computer dialogue touch screen, 4- is remotely monitored, 5- temperature control
System processed, 6- humidity control system, 7- salt fog generating system, 8- spray cleaning system, 9- water system, 10- Air-conditioning system,
11- temperature/humidity sensor, 12- brine tank, 13- salt water blowdown valve, 14- peristaltic pump, 15- chamber, the first electric heating of 16-,
17- sewage pipe, 18- saturation bucket, the second electric heating of 19-, the first blowdown valve of 20-, 21- both air flow modulation needle-valve, the first electricity of 22-
Magnet valve, 23- second solenoid valve, 24- third solenoid valve, 25- governor valve, 26- door cylinder, 27- pneumatic triple piece, 28- first are cut
Only valve, 29- compressed air source, the 4th solenoid valve of 30-, the second shut-off valve of 31-, 32- ion water inlet, 33- cleaning pump, 34-
One washer jet, the first scavenging air valve of 35-, the second washer jet of 36-, the second scavenging air valve of 37-, 38- ventilating fan, 39- third are clear
Wash nozzle, 40- bellows, 41- circulating fan, 42- evaporator, the electric heating of 43- third, 44- air outlet, 45- return air inlet, 46- drop
Water capillary, the 5th solenoid valve of 47-, 48- water filter, 49- water circulating pump, 50- water supply tank, the second blowdown valve of 51-, 52- stream
Measure valve, 53- balances water box, 54- humidifier, 55- constant temperature unit.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment, based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model provides a kind of technical solution referring to FIG. 1-2:
A kind of compound salt spray test chamber of programmable high/low temperature, including observing and controlling adjust PID1, and observing and controlling adjusts PID1 and is connected with certainly
Control center PLC2, automatic control center PLC2 connection human-computer dialogue touch screen 3, human-computer dialogue touch screen 3 connect long-range monitoring 4, automatic control
Center PLC2 is connected separately with temperature control system 5, humidity control system 6, salt fog generating system 7, spray cleaning system 8, supplies
Water system 9 and Air-conditioning system 10, temperature control system 5, humidity control system 6 are all connected with temperature/humidity sensor 11, salt mist system
Including brine tank 12, plays the role of salting liquid storage, pass through pipeline connection salt water blowdown valve 13, brine tank below brine tank 12
12 tops are connected to peristaltic pump 14 by pipeline, play the role of salting liquid conveying, pass through pipeline connection test above peristaltic pump 14
Case 15, the inside of chamber 15 are fixed with the first electric heating 16, play the role of it is thermostatically controlled, the bottom of chamber 15 and
Sewage pipe 17 is fixedly connected with positioned at the left side of peristaltic pump 14,15 bottom of the chamber and right side for being located at peristaltic pump 14 passes through pipe
Connection saturation bucket 18 in road plays the role of salt water atomization air supply processing equipment, is saturated inside bucket 18 and is fixed with the second electric heating
19, play the role of thermostatically controlled, the center of saturation 18 bottom of bucket is communicated with blowdown valve 20 by pipeline, is saturated bucket 18
Bottom and be located at the first blowdown valve 20 right side by pipeline connection both air flow modulation needle-valve 21, play both air flow modulation
Effect, the right side of both air flow modulation needle-valve 21 is sequentially communicated the first solenoid valve 22, second solenoid valve 23 and by pipeline
Three solenoid valves 24 are communicated with governor valve 25 by pipeline in second solenoid valve 23, and governor valve 25 is connected to door cylinder 26 by pipeline,
The right side of third solenoid valve 24 is connected to pneumatic triple piece 27 by pipeline, the work for playing the filtering of driving gas source, dividing water, stable-pressure device
With the right side of pneumatic triple piece 27 connects the first shut-off valve 28 by pipeline, and the right side of the first shut-off valve 28 is connected to by pipeline presses
Contracting air-source 29, be saturated bucket 18 bottom and be located at blowdown valve 20 left side by pipeline connection the 4th solenoid valve 30, the 4th
The lower left side of solenoid valve 30 is connected to the second shut-off valve 31 by pipeline, and the right side of the second shut-off valve 31 is connected to deionization by pipeline
The upper left side of water inlet 32, the 4th solenoid valve 30 is connected to cleaning pump 33 by pipeline, plays clear water spray, the work of thinned water pump
With, the top of cleaning pump 33 is connected to the first washer jet 34 by pipeline, plays the role of easily crystallizing component cleaning diluent nozzle,
First washer jet 34 is fixed at the inside of the first scavenging air valve 35, and the first scavenging air valve 35 is fixed in chamber 15,
Right side in cleaning pump 33 and positioned at the first washer jet 34 is connected to the second washer jet 36 by pipeline, plays easy crystallization unit
Part cleans the effect of diluent nozzle, and the second washer jet 36 is fixed in the inside of the second scavenging air valve 37, the second scavenging air valve
37 are fixedly connected in chamber 15, are fixed with ventilating fan 38 above the second scavenging air valve 37, in cleaning pump 33 and are located at
The right side of second washer jet 36 is connected to third washer jet 39 by pipeline, plays the work of easily crystallization component cleaning diluent nozzle
With third washer jet 39 is fixed at the inside of bellows 40, and circulating fan 41 is fixed on bellows 40, plays empty in case
Gas ventilation, dry effect, 39 lower section of third washer jet and the inside for being located at bellows 40 are fixed with evaporator 42, play
Temperature/humidity regulation effect in case, the right side of evaporator 42 and the inside for being located at bellows 40 are fixed with third electric heating 43,
Play the role of thermostatically controlled, bellows 40 and chamber 15 are connected by air outlet 44 and return air inlet 45,15 bottom of chamber
Portion is connected to the capillary 46 that drips by pipeline, plays the Hydra effect of wet-bulb temperature cotton yarn, and the top for the capillary 46 that drips is logical
Piping is connected to the 5th solenoid valve 47, and the right side of the 5th solenoid valve 47 is connected to water filter 48 by pipeline, plays humidification water
The right side of the effect of filtering, water filter 48 is communicated with water circulating pump 49 and flow valve 52 by pipeline, plays humidity system confession
The right side of the effect that the effect of water and fluid flow are adjusted, water circulating pump 49 is connected to water supply tank 50 by pipeline, and water supply tank 50 is logical
Piping is connected to the second blowdown valve 51, and the lower section of flow valve 52 is connected to balance water box 53 by pipeline, plays the work of water level control
With balance water box 53 are connected to humidifier 54 by pipeline, play the role of humidity regulation in case, humidifier 54 is connected with bellows
40, evaporator 42 is connected with constant temperature unit 55.
Utility model works process: temperature/humidity in settable test piece box before testing, the test cycle time, cycle-index,
The test models such as temperature/humidity program step number, temperature/time relationship gradient.And record style two sides in real time during the test
Medium temperature, test period, the relevant parameters such as temperature/time gradient relationship.The control system of equipment can by network organizing into
Enter intelligent network centralized management center (networking function needs user to inform in advance) of user, can also will be tested by mobile USB flash disk
Data are downloaded to PC machine and are handled, and 99 groups of program pool-size, cycle-index amounts to 10000 times, this procedures system is using special
For the intelligence control program that the equipment running process is write, high reliablity, performance stability contorting precision is high.Man-machine interface is friendly, behaviour
It is convenient to make, and salt fog generating system 7 is made of brine tank 12, peristaltic pump 14, Air-conditioning system 10, water supply tank 50 etc., and peristaltic pump 14 will
Solution is removed from brine tank 50 to laboratory, and heating and the work of Air-conditioning system 10 are that required humidity and temperature are provided in case,
Salting liquid pass through nozzle after be atomized, when spin manifold temperature and saturation 18 temperature of bucket when reach program require when can be sprayed automatically,
Drying system is made of circulating fan 41, third electric heating 43, diffuser plate, pipeline, will by circulating fan 41 under functions/drying
Room air enters cabinet by electric heating, and low-humidity environment is thus produced in cabinet.Spin manifold temperature by humidifier 54,
Evaporator 42, third electric heating 43, constant temperature unit 55 and Air-conditioning system 10 control, and the circulated air of Wind Volume can also be very fast
Change temperature, to realize Rapid Circulation function.At the same time, after temperature reaches requirement, if humidity difference is larger, humidification
Device also output par, c power, compensates the humidity in case, 6 system of humid control system is by humidifier 54, circulating fan 41, water
Steam is sent into case by humidifier 54 under humidity function, cabinet is made both to keep phase by road, 55 device of constant temperature unit composition
To humidity.Can be combined again by the heater of humidifier 54 and the refrigeration of compressor makes to keep temperature appropriate in case.Work as temperature
After reaching sets requirement, if humidity is excessive, condenser, which will do it, reduces humidity, if opposite humidity is too low, humidifier meeting
The humidity in case is adjusted in output par, c power.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (7)
1. a kind of compound salt spray test chamber of programmable high/low temperature, including observing and controlling adjust PID(1), it is characterised in that: the observing and controlling tune
Section PID(1) it is connected with automatic control center PLC(2), the automatic control center PLC(2) connection human-computer dialogue touch screen (3), it is described man-machine
Talk with the long-range monitoring (4) of touch screen (3) connection, the automatic control center PLC(2) it is connected separately with temperature control system (5), humidity
Control system (6), salt fog generating system (7), spray cleaning system (8), water system (9) and Air-conditioning system (10), the temperature
Degree control system (5), humidity control system (6) are all connected with temperature/humidity sensor (11), and the salt mist system includes brine tank
(12), salt water blowdown valve (13) are connected to by pipeline below the brine tank (12), pass through pipeline above the brine tank (12)
It is connected to peristaltic pump (14), passes through pipeline connection test case (15), the inside of the chamber (15) above the peristaltic pump (14)
Be fixed with the first electric heating (16), the bottom of the chamber (15) and be located at peristaltic pump (14) on the left of be fixedly connected with
Sewage pipe (17), chamber (15) bottom and the right side for being located at peristaltic pump (14) are connected to saturation bucket (18) by pipeline,
It is fixed with the second electric heating (19) inside the saturation bucket (18), the center of described saturation bucket (18) bottom passes through pipeline
Be communicated with blowdown valve (20), it is described saturation bucket (18) bottom and be located at the first blowdown valve (20) right side by pipeline connection
The right side of both air flow modulation needle-valve (21), the both air flow modulation needle-valve (21) is sequentially communicated the first solenoid valve by pipeline
(22), second solenoid valve (23) and third solenoid valve (24) are communicated with governor valve by pipeline on the second solenoid valve (23)
(25), the governor valve (25) is connected to door cylinder (26) by pipeline, and the right side of the third solenoid valve (24) is connected by pipeline
Logical pneumatic triple piece (27), the right side of the pneumatic triple piece (27) are connected the first shut-off valve (28) by pipeline, and described first section
Only the right side of valve (28) is by pipeline connection compressed air source (29), the bottom of saturation bucket (18) and positioned at blowdown valve
(20) left side is connected to the 4th solenoid valve (30) by pipeline, and the lower left side of the 4th solenoid valve (30) is connected to the by pipeline
The right side of two shut-off valves (31), second shut-off valve (31) is connected to deionization water inlet (32) by pipeline, the 4th electricity
The upper left side of magnet valve (30) is connected to cleaning pump (33) by pipeline, and the top of the cleaning pump (33) is clear by pipeline connection first
It washes nozzle (34), first washer jet (34) is fixed at the inside of the first scavenging air valve (35), first scavenging air valve
(35) it is fixed on chamber (15), passes through on the cleaning pump (33) and on the right side of the first washer jet (34)
Pipeline is connected to the second washer jet (36), and second washer jet (36) is fixed in the interior of the second scavenging air valve (37)
Portion, second scavenging air valve (37) are fixedly connected on chamber (15), are fixed with and change above second scavenging air valve (37)
Gas blower (38) on the cleaning pump (33) and is located at the right side of the second washer jet (36) and is connected to third by pipeline and cleans
Nozzle (39), the third washer jet (39) are fixed at the inside of bellows (40), are fixed on the bellows (40)
Circulating fan (41), third washer jet (39) lower section and the inside for being located at bellows (40) are fixed with evaporator
(42), the right side of the evaporator (42) and be located at bellows (40) inside be fixed with third electric heating (43), the wind
Case (40) is connected with chamber (15) by air outlet (44) and return air inlet (45), and chamber (15) bottom passes through pipe
Road connection is dripped capillary (46), and the top of the capillary that drips (46) is connected to the 5th solenoid valve (47) by pipeline, described
The right side of 5th solenoid valve (47) is connected to water filter (48) by pipeline, and the right side of the water filter (48) is connected by pipeline
It is connected with water circulating pump (49) and flow valve (52), the right side of the water circulating pump (49) is connected to water supply tank (50) by pipeline, institute
It states water supply tank (50) and the second blowdown valve (51) is connected to by pipeline, the lower section of the flow valve (52) is connected to equilibrium water by pipeline
Box (53), the balance water box (53) are connected to humidifier (54) by pipeline, and the humidifier (54) is connected with bellows (40), institute
It states evaporator (42) and is connected with constant temperature unit (55).
2. a kind of compound salt spray test chamber of programmable high/low temperature according to claim 1, it is characterised in that: the observing and controlling tune
Section PID(1) with the relationship of automatic control center PLC(2) be mutually transmit reading and writing data exchange, the automatic control center PLC(2) with it is man-machine
Talk with touch screen (3) relationship be mutual send instructions read-write, data storage, calculate analysis, the long-range monitoring (4) with it is man-machine
The relationship of dialogue touch screen (3) carries out information publication to human-computer dialogue touch screen (3) for long-range monitoring (4), control centre manages,
Local internet building.
3. a kind of compound salt spray test chamber of programmable high/low temperature according to claim 1, it is characterised in that: the temperature/wet
Spend model industrial platinum resistance pt100(dry-bulb temperature, the corrosion-resistance treatment of sensor (11)), the type of the circulating fan (41)
Number be tri- leaf Roots blower of ZLS-65W.
4. a kind of compound salt spray test chamber of programmable high/low temperature according to claim 1, it is characterised in that: the peristaltic pump
(14) model WT600-4F.
5. a kind of compound salt spray test chamber of programmable high/low temperature according to claim 1, it is characterised in that: the humidifier
(54) model DRS-18A.
6. a kind of compound salt spray test chamber of programmable high/low temperature according to claim 1, it is characterised in that: described first is clear
It is identical with the structure of third washer jet (39) to wash nozzle (34), the second washer jet (36).
7. a kind of compound salt spray test chamber of programmable high/low temperature according to claim 1, it is characterised in that: first electricity
Magnet valve (22), second solenoid valve (23), the model phase of third solenoid valve (24), the 4th solenoid valve (30) and the 5th solenoid valve (47)
With and for 2W water valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821829560.8U CN208984511U (en) | 2018-11-08 | 2018-11-08 | A kind of compound salt spray test chamber of programmable high/low temperature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821829560.8U CN208984511U (en) | 2018-11-08 | 2018-11-08 | A kind of compound salt spray test chamber of programmable high/low temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208984511U true CN208984511U (en) | 2019-06-14 |
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|---|---|---|---|
| CN201821829560.8U Expired - Fee Related CN208984511U (en) | 2018-11-08 | 2018-11-08 | A kind of compound salt spray test chamber of programmable high/low temperature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211769A (en) * | 2018-11-08 | 2019-01-15 | 上海怡骋工贸有限公司 | A kind of compound salt spray test chamber of programmable high/low temperature |
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2018
- 2018-11-08 CN CN201821829560.8U patent/CN208984511U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211769A (en) * | 2018-11-08 | 2019-01-15 | 上海怡骋工贸有限公司 | A kind of compound salt spray test chamber of programmable high/low temperature |
| CN109211769B (en) * | 2018-11-08 | 2024-03-22 | 上海怡骋工贸有限公司 | Programmable high-low temperature compound salt spray test box |
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