A high-efficiency sweat resistance evaluation device for fingerprint-resistant galvanized steel sheet and a method of using the same

Abstract

The application discloses a high-efficiency sweat resistance evaluation device for fingerprint-resistant galvanized sheet and a use method thereof, and relates to the technical field of sweat resistance evaluation of materials. The high-efficiency sweat resistance evaluation device for fingerprint-resistant galvanized sheet and the use method thereof comprise a main box body, water storage cavities are connected to the lower ends of the left and right sides of the main box body, an atomizer is connected to the bottom of the inside of the main box body, a heater is connected to the lower end of the inside of the main box body, a material storage tank is connected to the upper end of the left surface of the main box body, a mixing cavity is connected to the left surface of the inside of the main box body, a rotating rod is connected to the middle of the inside of the main box body, a rotating motor is connected to the right end of the rotating rod, a steel plate clamping plate is arranged on the outer surface of the rotating rod, a clamping groove is formed in the inside of the steel plate clamping plate, a steel plate is inserted into the inside of the clamping groove and connected, a screw rod is connected to the front side of the upper end of the inside of the main box body, a screw rod motor is connected to the right side of the screw rod, a sliding block is arranged on the outer side of the screw rod, and a water storage pipe is connected to the lower surface of the sliding block.

Description

Technical Field

[0001] This invention relates to the field of evaluation technology of material sweat resistance, specifically to an efficient device for evaluating the sweat resistance of fingerprint-resistant galvanized steel sheets and its usage method. Background Technology

[0002] Galvanized steel sheet refers to steel sheet with a hot-dip galvanized or electro-galvanized coating. It is widely used in construction, home appliances, automobiles, ships, container manufacturing, and electromechanical industries. It is an important type of steel sheet for corrosion protection. With industrial development, users have increasingly higher requirements for the surface performance of galvanized sheets. In the high-end home appliance manufacturing industry, workers' fingers touching the surface of galvanized sheets during processing can leave fingerprints due to sweat. Fingerprint-resistant galvanized sheets undergo a passivation treatment during production to enhance their resistance to sweat (i.e., the ability of the galvanized sheet to resist the influence of sweat on the surface color). Currently, the sweat resistance of fingerprint-resistant galvanized sheets has become an important evaluation indicator.

[0003] Existing testing methods mostly involve manually preparing simulated sweat, dripping the simulated sweat onto the galvanized sheet to be tested, waiting for a period of time, and then hanging it inside a heat-insulated and humidified chamber. After about two hours, the galvanized sheet is taken out for testing. This requires the tester to wait for the reaction to finish, which is a rather cumbersome process. Therefore, we designed an efficient device for evaluating the sweat resistance of fingerprint-resistant galvanized sheets and its usage method. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides an efficient device for evaluating the fingerprint resistance and sweat resistance of galvanized steel sheets, along with its application method, thus solving the problem of cumbersome procedures in existing testing methods.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides an efficient device for evaluating the fingerprint-resistant and sweat-resistant properties of galvanized steel sheets and its usage method, comprising: a hollow main chamber with an open front end; water storage chambers connected to the lower ends of the left and right sides of the main chamber; two atomizers connected to the bottom inside the main chamber; a heater connected to the lower end inside the main chamber, the heater being higher than the height of the atomizers; a water outlet hole opened at the lower end of the water storage chamber on the right side; a door connected to the front opening of the main chamber; four material storage tanks connected to the upper end of the left surface of the main chamber; and a connection between the left surface inside the main chamber and... A mixing chamber is connected to four material storage tanks and a left-side water storage chamber via pipelines. A mixing water pump is connected to the bottom of the left-side water storage chamber. A solenoid valve is connected to the pipeline at the lower end of each material storage tank. A flow meter is connected to the end of the pipeline between the material storage tank and the left-side water storage chamber. A rotating rod is connected to the middle of the main housing, with its right end extending to the right side of the main housing. A rotating motor is connected to the right end of the rotating rod, located on the right surface of the main housing. A steel plate clamp is fitted onto the outer surface of the rotating rod, and the steel plate clamp has an opening inside. A slot is provided, into which a steel plate is inserted and connected. A screw is connected to the upper front side of the main housing. A guide rod is connected to the upper part of the main housing and above the screw. The right side of the screw extends to the right side of the main housing. A screw motor is connected to the right side of the screw and on the right surface of the main housing. A slider is sleeved on the outside of the screw and guide rod. The slider and screw are connected by threads. A water storage pipe is connected to the lower surface of the slider. A T-shaped slot is opened at the lower end of the water storage pipe. A water outlet pipe is inserted and connected inside the T-shaped slot. A rubber ring is connected to the upper end of the pipe. An inlet is opened on the outer side of the upper end of the outlet pipe. Hydraulic actuators are connected to the left and right sides of the water storage pipe. A connecting plate is connected to the lower end of the telescopic end of the hydraulic actuator. The connecting plate is fixedly connected to the outer side of the outlet pipe. A water supply pump is connected to the lower end of the mixing chamber. The water supply pump is connected to the water storage pipe through a pipe. A controller is connected to the upper left end of the front surface of the main body. The controller is electrically connected to the atomizer, heater, mixing pump, solenoid valve, flow meter, rotary motor, screw motor, hydraulic actuator, and water supply pump.

[0009] Preferably, a cooling drain chamber is connected to the rear end of the main housing. The upper end of the cooling drain chamber is connected to the interior of the main housing. A cooling water pipe is connected to the middle of the interior of the cooling drain chamber. A cooling pipe water supply valve is connected to the lower end of the water storage chamber on the right side. The cooling pipe water supply valve is connected to the cooling water pipe through a pipe. A wastewater collection chamber is inserted and connected to the lower end of the cooling drain chamber. The interior of the wastewater collection chamber coincides with the interior of the cooling drain chamber.

[0010] Preferably, a fan is connected to the upper end of the front surface inside the main housing, and the fan outlet is opposite to the connection point of the cooling drainage chamber in the main housing.

[0011] Preferably, a pH concentration detection probe is connected inside the mixing chamber, a temperature and humidity detection probe is connected inside the main housing, and the controller is electrically connected to the pH concentration detection probe and the temperature and humidity detection probe.

[0012] Preferably, the inside of the cabinet door is made of glass, and a sealing strip is connected to the outside of the cabinet door at the connection with the main body.

[0013] Preferably, a motor A is connected to the lower end of the mixing chamber, and a stirring blade is connected to the upper output shaft of the motor A.

[0014] A method for using a highly efficient fingerprint-resistant galvanized steel sheet sweat resistance testing device, comprising the aforementioned highly efficient fingerprint-resistant galvanized steel sheet sweat resistance testing device, wherein the specific operation is as follows:

[0015] When in use, add distilled water to the two water storage chambers. The water outlet at the bottom of the right water storage chamber will supply water to the bottom of the main tank. Add disodium phosphate solution, sodium chloride solution, acetic acid and sodium chloride solution to the four material storage tanks respectively.

[0016] When in use, insert the galvanized steel plate A into the slot opened in the steel plate clamp, set the ratio of various materials in the controller, then close the box door and start the controller. The disodium phosphate solution, sodium chloride solution, acetic acid and sodium chloride solution in the four material storage tanks will flow into the mixing chamber through the pipeline. After the flow meter detects that the material has been added to the specified value, it sends an electrical signal to the controller to close the solenoid valve.

[0017] Simultaneously, the mixing pump will be activated to send distilled water from the storage chamber to the mixing chamber. When the flow meter on the upper pipe of the storage chamber detects that the set water volume has been reached, the mixing pump will be turned off. The disodium phosphate solution, sodium chloride solution, acetic acid, sodium chloride solution and distilled water in the mixing chamber will be mixed. Then, the artificial sweat will be delivered to the storage pipe through the water supply pump. After that, the controller will start the screw motor to drive the screw to rotate. The slider and the screw are connected by threads, and the upper end of the slider is also inserted and connected to a guide rod.

[0018] When the screw rotates, the slider moves axially, adjusting the position of the water outlet pipe. Once it reaches the designated position, the hydraulic actuator is activated, pulling the connecting plate to lift the water outlet pipe upwards. Artificial sweat flows through the inlet into the inside of the water outlet pipe and drips onto the steel plate A. Afterwards, the hydraulic actuator is turned off, pushing the connecting plate downwards and sealing the water outlet pipe with the rubber ring tightly against the inside of the water storage pipe. One drop of artificial sweat drips every 15mm-20mm.

[0019] After standing for ten minutes, start the rotating motor to rotate the rotating rod downwards by 90°, start the heater and nebulizer, and control the internal temperature of the main chamber at 50±2℃ and humidity at 95±2%. After two hours, take out steel plate A, evenly coat the sample steel plate A with medical white petroleum jelly, and let it stand for 2 hours. Then, use a colorimeter to measure and record the colorimetric values ​​of the sample before and after the experiment.

[0020] After the test, the surface condition of steel plate A sample was observed. If there were no traces at the original water droplet or the traces at the water droplet did not spread to the surrounding area, steel plate A sample was deemed to be qualified. However, if there were traces at the water droplet and the traces shifted and spread, steel plate A sample was deemed to be unqualified.

[0021] The change in chromaticity value ΔE before and after the test of another steel plate sample B is calculated as follows: ΔE = [L1 - L2 + (a1 - a2)] 2 +b1-b2] 1 / 2 If △E≤3, the steel plate B sample is deemed qualified; if △E>3, the steel plate B sample is deemed unqualified.

[0022] If both steel plate samples pass the test, the fingerprint-resistant galvanized steel plate is considered to have passed the test for sweat resistance; otherwise, it is considered to have failed the test.

[0023] (III) Beneficial Effects

[0024] This invention provides a highly efficient device for evaluating the fingerprint resistance and sweat resistance of galvanized steel sheets, and its method of use. Compared with the prior art, it has at least the following advantages:

[0025] This highly efficient fingerprint-resistant galvanized steel sheet sweat resistance evaluation device and its usage method involve preparing the sweat-resistant material in the correct proportions, inserting the galvanized steel sheet to be inspected into the slot, and then removing the steel sheet for testing after two hours. Attached Figure Description

[0026] Figure 1 This is an isometric view of the present invention;

[0027] Figure 2 This is a bottom view of the present invention;

[0028] Figure 3 This is a cross-sectional view of the present invention;

[0029] Figure 4 This is a longitudinal sectional view of the present invention;

[0030] Figure 5 This is a rear view of the present invention;

[0031] Figure 6 This is a rear sectional view of the present invention;

[0032] Figure 7 This is a top sectional view of the present invention;

[0033] Figure 8 This is a partial enlarged view of the present invention.

[0034] In the diagram: 1. Main chamber; 2. Water storage chamber; 3. Atomizer; 4. Heater; 5. Water outlet; 6. Door; 7. Material storage tank; 8. Mixing chamber; 9. Mixing water pump; 10. Solenoid valve; 11. Flow meter; 12. Rotating rod; 13. Rotating motor; 14. Steel plate clamp; 15. Slot; 16. Steel plate; 17. Screw; 18. Guide rod; 19. Screw motor; 20. Slider; 21. Water storage pipe; 22. Water outlet pipe; 23. Rubber ring; 24. Water inlet; 25. Hydraulic unit; 26. Connecting plate; 27. Water supply pump; 28. Controller; 31. Cooling drainage chamber; 32. Cooling water pipe; 33. Cooling pipe water supply valve; 34. Wastewater collection chamber; 35. Fan; 36. Motor A; 37. Stirring blades. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figure 1-8This invention provides a technical solution: a highly efficient device for evaluating the fingerprint-resistant and sweat-resistant properties of galvanized steel sheets and its usage method, comprising: a hollow main chamber 1 with an open front end; water storage chambers 2 connected to the lower ends of the left and right sides of the main chamber 1; two atomizers 3 connected to the bottom of the interior of the main chamber 1; a heater 4 connected to the lower end of the interior of the main chamber 1, the heater 4 being higher than the height of the atomizers 3; a water outlet 5 opened at the lower end of the water storage chamber 2 on the right side; a door 6 connected to the front opening of the main chamber 1; four material storage tanks 7 connected to the upper end of the left surface of the main chamber 1; and a mixing chamber 8 connected to the left surface of the interior of the main chamber 1. 8 is connected to four material storage tanks 7 and the left water storage chamber 2 via pipelines. A mixing water pump 9 is connected to the bottom of the left water storage chamber 2. A solenoid valve 10 is connected to the pipeline at the lower end of the material storage tank 7. A flow meter 11 is connected to the end of the pipeline between the material storage tank 7 and the left water storage chamber 2. A rotating rod 12 is connected to the middle of the interior of the main housing 1. The right end of the rotating rod 12 extends to the right side of the main housing 1. A rotating motor 13 is connected to the right end of the rotating rod 12 and located on the right surface of the main housing 1. A steel plate clamp 14 is fitted on the outer surface of the rotating rod 12. A clamping groove 15 is opened inside the steel plate clamp 14, and a connecting rod is inserted into the clamping groove 15. The main housing 1 has a steel plate 16. A screw 17 is connected to the upper front side of the main housing 1. A guide rod 18 is connected to the upper part of the main housing 1 and above the screw 17. The right side of the screw 17 extends to the right side of the main housing 1. A screw motor 19 is connected to the right side of the screw 17 and on the right surface of the main housing 1. A slider 20 is sleeved on the outside of the screw 17 and the guide rod 18. The slider 20 is threaded to the screw 17. A water storage pipe 21 is connected to the lower surface of the slider 20. A T-shaped slot is opened at the lower end of the water storage pipe 21. A water outlet pipe 22 is inserted and connected inside the T-shaped slot. A rubber ring 2 is connected to the upper end of the water outlet pipe 22. 3. An inlet 24 is provided on the outer side of the upper end of the water outlet pipe 22. Hydraulic actuators 25 are connected to the left and right sides of the water storage pipe 21. A connecting plate 26 is connected to the lower end of the telescopic end of the hydraulic actuator 25. The connecting plate 26 is fixedly connected to the outer side of the water outlet pipe 22. A water supply pump 27 is connected to the lower end of the inside of the mixing chamber 8. The water supply pump 27 is connected to the water storage pipe 21 through a pipe. A controller 28 is connected to the upper left end of the front surface of the main housing 1. The controller 28 is electrically connected to the atomizer 3, heater 4, mixing water pump 9, solenoid valve 10, flow meter 11, rotary motor 13, screw motor 19, hydraulic actuator 25, and water supply pump 27.

[0037] In use, distilled water is added to the two water storage chambers 2. The water outlet 5 at the lower end of the right water storage chamber 2 supplies water to the bottom of the main tank 1. Sodium phosphate solution, sodium chloride solution, acetic acid, and sodium chloride solution are added to the four material storage tanks 7 respectively. In use, the galvanized steel plate is inserted into the slot 15 of the steel plate clamping plate 14. The controller 28 is set with the proportions of various materials. Then, the tank door 6 is closed and the controller 28 is started. The sodium phosphate solution, sodium chloride solution, acetic acid, and sodium chloride solution in the four material storage tanks 7 will flow into the mixing chamber 8 through the pipes. After the flow meter 11 detects that the material has been added to the specified value, it sends an electrical signal to the controller 28 to close the solenoid valve 10. Simultaneously, it starts the mixing water pump 9, sending distilled water from the water storage chamber 2 to the mixing chamber 8. When the flow meter 11 on the upper pipe of the water storage chamber 2 detects that the set water volume has been reached, it shuts off the mixing water pump 9. The disodium phosphate solution, sodium chloride solution, acetic acid, sodium chloride solution, and distilled water inside the mixing chamber 8 are then mixed. The artificial sweat is then delivered to the water storage pipe 21 via the water supply pump 27. Afterwards, the controller 28 starts the screw motor 19, which... The screw 17 rotates, and the slider 20 is threadedly connected to the screw 17. A guide rod 18 is inserted into the upper end of the slider 20. When the screw 17 rotates, the slider 20 moves axially, adjusting the position of the outlet pipe 22. Once the designated position is reached, the hydraulic actuator 25 is activated, pulling the connecting plate 26 and lifting the outlet pipe 22 upwards. Artificial sweat flows through the inlet 24 into the interior of the outlet pipe 22, dripping onto the steel plate 16. Afterwards, the hydraulic actuator 25 is turned off, pushing the connecting plate 26 to lift the outlet pipe 22. Push the water pipe 22 down, and seal the inside of the water storage pipe 21 with the rubber ring 23. Drip artificial sweat every 15mm-20mm. After standing for ten minutes, start the rotating motor 13, causing the rotating rod 12 to rotate downwards by 90°. Start the heater 4 and atomizer 3, controlling the internal temperature of the main chamber 1 at 50±2℃ and humidity at 95±2%. After two hours, remove the steel plate 16 and evenly coat it with medical white petroleum jelly. Let it stand for two hours, and use a colorimeter to measure and record the colorimetric values ​​of the sample before and after the experiment. Observe the surface condition of the steel plate 16 sample after the test. If there are no traces at the original water droplet location or the traces at the water droplet location have not spread to the surrounding area, the steel plate 16 sample is considered qualified. If there are traces at the water droplet location and the traces have shifted and spread, the steel plate 16 sample is considered unqualified. The change in chromaticity value ΔE before and after the test of another 16 steel plate samples was calculated as follows: ΔE = [L1-L2+ (a1-a2)] 2 +b1-b2] 1 / 2If ΔE ≤ 3, the steel plate sample 16 is considered qualified; if ΔE > 3, the steel plate sample 16 is considered unqualified. If both steel plate sample 16 samples are qualified, the fingerprint-resistant galvanized steel plate is considered qualified in terms of sweat resistance; otherwise, it is considered unqualified.

[0038] like Figure 1-7 As shown in the figure, this embodiment of the invention provides an implementation method. Based on the above implementation method, the rear end of the main housing 1 is connected to a cooling drainage chamber 31. The upper end of the cooling drainage chamber 31 is connected to the interior of the main housing 1. A cooling water pipe 32 is connected to the middle of the interior of the cooling drainage chamber 31. The lower end of the interior of the water storage chamber 2 on the right side is connected to a cooling pipe water supply valve 33. The cooling pipe water supply valve 33 and the cooling water pipe 32 are connected by a pipe. A wastewater collection chamber 34 is inserted and connected to the lower end of the cooling drainage chamber 31. The interior of the wastewater collection chamber 34 coincides with the interior of the cooling drainage chamber 31.

[0039] Analysis of the above structure shows that the steam inside the main chamber 1 and the water molecules generated by the atomizer will enter the cooling drain chamber 31 through the connection between the cooling drain chamber 31 and the main chamber 1. After the steam enters the cooling drain chamber 31, it will encounter the cooling water pipe 32. The cooling pipe water supply valve 33 will conduct the water inside the right water storage chamber 2 to the cooling water pipe 32, thereby cooling the cooling water pipe 32, condensing the steam into small water droplets, and falling into the wastewater collection chamber 34.

[0040] like Figure 1-6 As shown, this embodiment of the invention provides an implementation method. Based on the above implementation method, a fan 35 is connected to the upper end of the front surface inside the main housing 1, and the air outlet of the fan 35 is opposite to the cooling drainage cavity 31 and the connection point of the main housing 1.

[0041] Analysis of the above structure shows that when the fan 35 is turned on, the fan 35 will blow the atomized water particles and steam into the interior of the cooling drain chamber 31.

[0042] like Figure 1-8 As shown, this embodiment of the invention provides an implementation method. Based on the above implementation method, a pH concentration detection probe is connected inside the mixing chamber 8, a temperature and humidity detection probe is connected inside the main housing 1, and the controller 28 is electrically connected to the pH concentration detection probe and the temperature and humidity detection probe.

[0043] Analysis of the above structure shows that the pH concentration detection probe and the temperature and humidity detection probe will detect the pH concentration value inside the mixing chamber 8 and the humidity and temperature inside the main chamber 1. These data will be displayed on the controller 28. When the temperature and humidity exceed or fall below the set value, the controller 28 will control the atomizer 3 and the heater 4. When the pH value is lower or exceeds the set value, the user can adjust the material ratio through the controller 28.

[0044] like Figure 1-7 As shown in the figure, this embodiment of the invention provides an implementation method. Based on the above implementation method, the inside of the box door 6 is made of glass, and a sealing strip is connected to the connection between the outside of the box door 6 and the main box body 1.

[0045] Analysis of the above structure shows that during use, the internal reaction can be observed through the glass in the middle of the door 6, while the sealing strip at the connection between the outer side of the door 6 and the main body 1 can prevent the internal gas from escaping through the connection between the outer side of the door 6 and the main body 1.

[0046] like Figure 1-7 As shown, this embodiment of the invention provides an implementation method. Based on the above implementation method, a motor A36 is connected to the lower end of the mixing chamber 8, and a stirring blade 37 is connected to the upper output shaft of the motor A36.

[0047] Analysis of the above structure shows that when disodium phosphate solution, sodium chloride solution, acetic acid, sodium chloride solution and distilled water are mixed inside the mixing chamber 8, the motor A36 is started. The motor A36 will drive the stirring blade 37 to rotate, so that the simulated sweat in the mixing chamber 8 is quickly mixed.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A highly efficient device for evaluating the fingerprint-resistant and sweat-resistant properties of galvanized steel sheets, characterized in that, include: The main box (1) is hollow inside and open at the front. Water storage chambers (2) are connected to the lower ends of the left and right sides of the main box (1). Two atomizers (3) are connected to the bottom inside the main box (1). A heater (4) is connected to the lower end inside the main box (1). The heater (4) is higher than the height of the atomizer (3). A water outlet (5) is opened at the lower end of the water storage chamber (2) on the right side. A box door (6) is connected to the opening at the front end of the main box (1). Four material storage tanks (7) are connected to the upper end of the left surface of the main box (1). A mixing chamber (8) is connected to the left surface inside the main box (1). The mixing chamber (8) is connected to the four material storage tanks (7) and the left water storage chamber (2) through pipes. The left water storage chamber (2) is located inside the main box (1). A mixing water pump (9) is connected to the bottom of the main body (7). A solenoid valve (10) is connected to the pipeline at the lower end of the material storage tank (7). A flow meter (11) is connected to the end of the pipeline between the material storage tank (7) and the left water storage chamber (2). A rotating rod (12) is connected in the middle inside the main body (1). The right end of the rotating rod (12) extends to the right side of the main body (1). A rotating motor (13) is connected to the right end of the rotating rod (12) and located on the right surface of the main body (1). A steel plate clamp (14) is fitted on the outer surface of the rotating rod (12). A slot (15) is opened inside the steel plate clamp (14). A steel plate (16) is inserted and connected inside the slot (15). A screw is connected to the front side of the upper end inside the main body (1). 17), the upper part of the main housing (1) is connected to the upper end of the screw (17), and the right side of the screw (17) extends to the right side of the main housing (1). The right side of the screw (17) is connected to the right surface of the main housing (1), and the right side of the screw (17) is connected to the right surface of the main housing (1). A slider (20) is sleeved on the outside of the screw (17) and the guide rod (18). The slider (20) is connected to the screw (17) by a thread. A water storage pipe (21) is connected to the lower surface of the slider (20). A T-shaped slot is opened at the lower end of the water storage pipe (21). A water outlet pipe (22) is inserted and connected inside the T-shaped slot. A rubber ring (23) is connected to the upper end of the water outlet pipe (22). A rubber ring (23) is opened on the outer side of the upper end of the water outlet pipe (22). The system is equipped with an inlet (24), and hydraulic actuators (25) are connected to the left and right sides of the water storage pipe (21). A connecting plate (26) is connected to the lower end of the telescopic end of the hydraulic actuator (25). The connecting plate (26) is fixedly connected to the outside of the water outlet pipe (22). A water supply pump (27) is connected to the lower end of the inside of the mixing chamber (8). The water supply pump (27) is connected to the water storage pipe (21) through a pipe. A controller (28) is connected to the upper left end of the front surface of the main box (1). The controller (28) is electrically connected to the atomizer (3), heater (4), mixing water pump (9), solenoid valve (10), flow meter (11), rotary motor (13), screw motor (19), hydraulic actuator (25), and water supply pump (27).

2. The efficient fingerprint-resistant galvanized steel sheet sweat resistance evaluation device according to claim 1, characterized in that: The rear end of the main body (1) is connected to a cooling drain chamber (31). The upper end of the cooling drain chamber (31) is connected to the interior of the main body (1). A cooling water pipe (32) is connected in the middle of the interior of the cooling drain chamber (31). A cooling pipe water supply valve (33) is connected to the lower end of the water storage chamber (2) on the right side. The cooling pipe water supply valve (33) is connected to the cooling water pipe (32) through a pipe. A wastewater collection chamber (34) is inserted and connected to the lower end of the cooling drain chamber (31). The interior of the wastewater collection chamber (34) overlaps with the interior of the cooling drain chamber (31).

3. The efficient fingerprint-resistant and sweat-resistant testing device for galvanized steel sheets according to claim 2, characterized in that: A fan (35) is connected to the upper end of the front surface inside the main housing (1), and the air outlet of the fan (35) is facing the connection between the cooling drainage cavity (31) and the main housing (1).

4. The efficient fingerprint-resistant galvanized steel sheet sweat resistance evaluation device according to claim 1, characterized in that: The mixing chamber (8) is connected to a pH concentration detection probe, the main housing (1) is connected to a temperature and humidity detection probe, and the controller (28) is electrically connected to the pH concentration detection probe and the temperature and humidity detection probe.

5. The efficient fingerprint-resistant galvanized steel sheet sweat resistance evaluation device according to claim 1, characterized in that: The lower end of the mixing chamber (8) is connected to a motor A (36), and a stirring blade (37) is connected to the output shaft of the motor A (36).

6. A method for using an efficient device for evaluating the fingerprint resistance and sweat resistance of galvanized steel sheets, characterized in that: The efficient fingerprint-resistant and sweat-resistant galvanized steel sheet testing device as described in claim 1 operates as follows: When in use, add distilled water to the inside of the two water storage chambers (2), and the water outlet (5) at the lower end of the water storage chamber (2) on the right side will supply water to the bottom of the main tank (1). Add disodium phosphate solution, sodium chloride solution, acetic acid and sodium chloride solution to the inside of the four material storage tanks (7) respectively. When in use, insert the galvanized steel plate into the slot (15) opened in the steel plate clamp (14), set the ratio of various materials in the controller (28), then close the box door (6), start the controller (28), and the disodium phosphate solution, sodium chloride solution, acetic acid and sodium chloride solution in the four material storage tanks (7) will flow into the mixing chamber (8) through the pipe. After the flow meter (11) detects that the material has been added to the specified value, it sends an electrical signal to the controller (28) to close the solenoid valve (10); At the same time, the mixing pump (9) will be started to send the distilled water inside the water storage chamber (2) to the mixing chamber (8). When the flow meter (11) on the upper pipe of the water storage chamber (2) detects that the set water volume has been reached, the mixing pump (9) will be turned off. The disodium phosphate solution, sodium chloride solution, acetic acid, sodium chloride solution and distilled water inside the mixing chamber (8) will be mixed. Then, the artificial sweat will be delivered to the water storage pipe (21) through the water supply pump (27). After that, the controller (28) will start the screw motor (19) to drive the screw (17) to rotate. The slider (20) is connected to the screw (17) by a thread. The upper end of the slider (20) is also connected to the guide rod (18). When the screw (17) rotates, the slider (20) will move axially, thereby adjusting the position of the water outlet pipe (22). After reaching the designated position, the hydraulic device (25) is activated. The hydraulic device (25) will pull the connecting plate (26), thereby lifting the water outlet pipe (22) upward. The artificial sweat will flow through the inlet (24) into the inside of the water outlet pipe (22) and drip onto the steel plate A. Then the hydraulic device (25) is closed. The hydraulic device (25) will push the connecting plate (26) to push the water outlet pipe (22) downward. The rubber ring (23) is pressed tightly against the inside of the water storage pipe (21) to seal it. One drop of artificial sweat drips every 15mm-20mm. After standing for ten minutes, start the rotating motor (13) to drive the rotating rod (12) to rotate downwards by 90°, start the heater (4) and nebulizer (3), control the internal temperature of the main chamber (1) at 50±2℃ and the humidity at 95±2%, and after two hours, take out the steel plate A, apply medical white petroleum jelly evenly to the sample steel plate A, place it for 2 hours, and use a colorimeter to measure and record the colorimetric values ​​of the sample before and after the experiment. After the test, the surface condition of steel plate A sample was observed. If there were no traces at the original water droplet or the traces at the water droplet did not spread to the surrounding area, steel plate A sample was deemed to be qualified. However, if there were traces at the water droplet and the traces shifted and spread, steel plate A sample was deemed to be unqualified. The change in chromaticity value ΔE before and after the test of another steel plate sample B is calculated as follows: ΔE = [L1 - L2 + (a1 - a2)] 2 +b1-b2] 1 / 2 If △E≤3, the steel plate B sample is deemed qualified; if △E>3, the steel plate B sample is deemed unqualified. If both steel plate (16) samples pass the judgment, the fingerprint-resistant galvanized plate is considered to be compliant in terms of sweat resistance; otherwise, it is considered ineligible.

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