Multifunctional yellow resistance testing equipment

Abstract

The utility model discloses multifunctional yellow resistance test equipment, which belongs to the technical field of aging test, and comprises a cabinet body, an auxiliary device, a constant temperature device, a telescopic rotating device and a light source adjusting device, the auxiliary device is arranged on the left side of the cabinet body, the constant temperature device is arranged on the right side of the cabinet body, and the telescopic rotating device is arranged on the right side of the cabinet body. The telescopic rotating device is installed in the middle area of the right side of the cabinet body, the light source adjusting device is installed on the upper right side of the cabinet body and comprises a shading ring, a first support, a second support, a rotating frame, a first rotating plate and a second rotating plate, and the shading ring is fixedly installed on the upper side of the interior of the cabinet body; the first support is fixedly installed on the left side of the shading ring, the second support is fixedly installed on the rear side of the shading ring, and the rotating frame is rotationally connected to the second support through a rotating shaft. Through the mode, the front-back and left-right illumination angles of the lamp can be quickly adjusted, and the illumination effect of a product to be tested can be quickly focused or diffused.

Description

A multifunctional yellowing resistance testing device Technical Field

[0001] This utility model relates to the field of aging testing technology, specifically a multifunctional yellowing resistance testing device. Background Technology

[0002] Yellowing resistance testing of shoe material surface treatment agents is an important step in evaluating their anti-yellowing performance. It is mainly used to test the color stability of materials under the influence of light, high temperature, humidity or chemical substances. By simulating actual use environments (such as light, sweat, high temperature, etc.), it evaluates the ability of surface treatment agents to inhibit yellowing of shoe materials (such as leather, synthetic leather, fabric, TPU, etc.), ensuring that the product maintains stable appearance and color during long-term use or storage. The main principle is to simulate ultraviolet radiation in sunlight to accelerate the yellowing process of materials.

[0003] Chinese patent CN218212564U discloses a yellowing aging tester, comprising a base and a test body. The test body is located on top of the base. A driven gear is rotatably mounted at the bottom of the inner cavity of the test body. A drive motor is mounted on one side of the driven gear and is embedded in the bottom of the inner cavity of the test body. The power output end of the drive motor is connected to the drive gear, which meshes with the driven gear. A turntable is welded to the surface of the driven gear. A guide frame is provided at the edge of the turntable surface. A movable seat is slidably mounted inside the guide frame. A mounting plate is provided on the surface of the movable seat. A daylight simulation lamp is mounted on the surface of the mounting plate. A threaded connection seat is provided on the surface of the mounting plate, and a lampshade is movably connected to the surface of the mounting plate through the threaded connection seat. A through hole is formed at the center of the driven gear and the turntable surface, and a placement plate is mounted inside the through hole. The bottom of the placement plate is connected to the bottom of the inner cavity of the test body through a through hole. The plate body is located on the surface of the turntable, and a vent hole is formed inside the inner cavity of the placement plate.

[0004] However, the technical solution of this patent has the following problems:

[0005] This patent cannot quickly adjust the front-to-back and left-to-right illumination angles of the lamp, nor can it quickly focus or diffuse the illumination effect on the product under test.

[0006] Therefore, those skilled in the art have provided a multifunctional yellowing resistance testing device to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a multifunctional yellowing resistance testing device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A multifunctional yellowing resistance testing device includes a cabinet, and further includes: an auxiliary device, a constant temperature device, a telescopic rotation device, and a light source adjustment device. The auxiliary device is installed on the left side of the cabinet, the constant temperature device is installed in the middle area of ​​the right side of the cabinet, the telescopic rotation device is installed in the middle area of ​​the right side of the cabinet, and the light source adjustment device is installed on the upper right side of the cabinet. The light source adjustment device includes: a light-shielding ring, a first bracket, a second bracket, a rotating frame, a first rotating plate, and a second rotating plate. The light-shielding ring is fixedly installed inside the upper right side of the cabinet, the first bracket is fixedly installed on the left side of the light-shielding ring, the second bracket is fixedly installed on the rear side of the light-shielding ring, the rotating frame is rotatably connected to the second bracket via a rotating shaft, the first rotating plate is rotatably connected to the first bracket via a rotating shaft, and the second rotating plate is rotatably connected to the end of the first rotating plate away from the first bracket via a rotating shaft. The light source adjustment device further includes: an adjustment component, which is installed on the first bracket.

[0010] Furthermore, the adjustment assembly includes: a first motor, a second motor, a rotating ring, a reflective ring, a lamp plate, and a heat sink. The first motor is fixedly mounted on a first bracket, the second motor is fixedly mounted on a second bracket, the rotating shaft of the rotating frame is fixedly connected to the output shaft of the second motor, the rotating shaft of the first rotating plate is fixedly connected to the output shaft of the first motor, the reflective ring is fixedly mounted on the lower side of the rotating ring, the lamp plate is fixedly mounted on the reflective ring, and the heat sink is fixedly mounted on the lamp plate. The adjustment assembly also includes: a focusing assembly and a limiting assembly. The focusing assembly is mounted on the lower side of the rotating ring, and the limiting assembly is mounted on a light-shielding ring.

[0011] Furthermore, the limiting component includes: an extension rod and a limit switch, wherein multiple extension rods are fixedly installed on the inner side wall of the light-shielding ring, and the limit switch is fixedly installed on the end of the extension rod away from the light-shielding ring;

[0012] Furthermore, the focusing assembly includes: a fixed rod, a sliding frame, a lens, a third motor, and a threaded rod. The fixed rod is fixedly installed on the right side of the reflective ring. The right side of the sliding frame is slidably connected to the fixed rod, and the left side of the sliding frame is slidably connected to the reflective ring. The lens is fixedly installed on the sliding frame. The third motor is fixedly installed on the left side of the reflective ring. The upper side of the threaded rod is fixedly connected to the output shaft of the third motor, and the lower side of the threaded rod is threadedly connected to the left side of the sliding frame.

[0013] Furthermore, the telescopic rotating device includes: a rotating rod, a worm gear, a fourth motor, and a worm. The rotating rod is rotatably connected to the cabinet, the worm gear is fixedly installed on the lower side of the rotating rod, the fourth motor is fixedly installed on the lower side of the cabinet, and the worm is fixedly connected to the output shaft of the fourth motor. The worm and the worm gear mesh with each other.

[0014] Furthermore, the telescopic rotation device also includes: a moving rod, a support platform, and limiting screws. The moving rod is slidably connected to the rotating rod, and the support platform is fixedly installed on the upper side of the moving rod. Two slots are opened on the moving rod, and multiple limiting screws are threadedly connected to the rotating rod. One end of each limiting screw is set in a slot.

[0015] Furthermore, the auxiliary device includes: an ozone generator, a sulfur dioxide generator, and a material storage box. The ozone generator is fixedly installed on the left rear side of the cabinet, the sulfur dioxide generator is fixedly installed on the left front side of the cabinet, and the material storage box is fixedly installed on the left lower side of the cabinet.

[0016] Furthermore, the constant temperature device includes: a heating plate, a cabinet door, a sealing strip, an exhaust fan, and a solenoid valve. Multiple heating plates are fixedly installed inside the cabinet. The cabinet door is hinged to the cabinet. The sealing strip is fixedly installed on the cabinet door. Two exhaust fans are fixedly installed on the rear side of the cabinet. The solenoid valve is fixedly connected to the output end of the exhaust fan. When the solenoid valve is opened, the exhaust fan starts to quickly expel toxic gases from inside the cabinet.

[0017] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses the rotation of the first motor output shaft of the light source adjustment device to drive the first rotating plate to rotate, the rotation of the first rotating plate to drive the second rotating plate to rotate, the rotation of the second rotating plate to drive the rotating ring to rotate back and forth, the rotation of the rotating ring to drive the reflective ring to rotate back and forth, the rotation of the second motor output shaft to drive the rotating frame to rotate, the rotation of the rotating frame to drive the rotating ring to rotate left and right, and the rotation of the rotating ring to drive the reflective ring to rotate left and right, so that the reflective ring can rotate quickly left and right and back and forth, which is beneficial to quickly adjust the left and right angle and the front and back angle of the light.

[0018] 2. The output shaft of the third motor of the focusing component rotates, which drives the threaded rod to rotate. The rotation of the threaded rod drives the sliding frame to move up and down. The up and down movement of the sliding frame drives the lens to move up and down. The distance between the lens and the lamp board changes, so that the focusing effect of the lens on the light emitted by the lamp on the lamp board is different. This allows for rapid adjustment of the illumination range and intensity, which is beneficial for quickly focusing or diffusing the illumination effect on the product under test. Attached Figure Description

[0019] Figure 1 is a three-dimensional structural schematic diagram of this utility model;

[0020] Figure 2 is a front view of this utility model;

[0021] Figure 3 is a two-dimensional structural schematic diagram of this utility model;

[0022] Figure 4 is a schematic diagram of the structure of this utility model with part of the cabinet removed;

[0023] Figure 5 is a schematic diagram of the structure of this utility model after removing part of the cabinet body;

[0024] Figure 6 is a partial structural schematic diagram of the light source adjustment device of this utility model;

[0025] Figure 7 is a partial structural schematic diagram of the light source adjustment device of this utility model;

[0026] Figure 8 is an overall cross-sectional view of the light source adjustment device of this utility model, excluding some of its structures.

[0027] Figure 9 is a partial structural schematic diagram of the telescopic and rotating device of this utility model.

[0028] In the diagram: 1. Cabinet; 2. Auxiliary device; 21. Ozone generator; 22. Sulfur dioxide generator; 23. Material storage box; 3. Temperature control device; 31. Heating plate; 32. Cabinet door; 33. Sealing strip; 34. Exhaust fan; 35. Solenoid valve; 4. Telescopic rotation device; 41. Rotating rod; 42. Worm gear; 43. Fourth motor; 44. Worm; 45. Moving rod; 46. Support platform; 47. Limit screw; 48. Slot; 5. Light source Adjustment device; 51. Light-shielding ring; 52. First bracket; 53. Second bracket; 54. Rotating frame; 55. First rotating plate; 56. Second rotating plate; 57. First motor; 58. Second motor; 59. Rotating ring; 510. Reflecting ring; 511. Lamp panel; 512. Heat sink; 513. Extension rod; 514. Limit switch; 515. Fixing rod; 516. Sliding frame; 517. Lens; 518. Third motor; 519. Threaded rod. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0031] Example 1: In some embodiments, please refer to Figures 1-9 of the accompanying drawings. A multifunctional yellowing resistance testing device includes a cabinet 1, and further includes: an auxiliary device 2, a constant temperature device 3, a telescopic rotation device 4, and a light source adjustment device 5. The auxiliary device 2 is installed on the left side of the cabinet 1, the constant temperature device 3 is installed on the right side of the cabinet 1, the telescopic rotation device 4 is installed in the middle area of ​​the right side of the cabinet 1, and the light source adjustment device 5 is installed on the upper right side of the cabinet 1. The light source adjustment device 5 includes: a light-shielding ring 51, a first bracket 52, a second bracket 53, a rotating frame 54, and a first rotating plate. The light-shielding ring 51 is fixedly installed on the upper side inside the cabinet 1. The first bracket 52 is fixedly installed on the left side of the light-shielding ring 51. The second bracket 53 is fixedly installed on the rear side of the light-shielding ring 51. The rotating frame 54 is rotatably connected to the second bracket 53 via a rotating shaft. The first rotating plate 55 is rotatably connected to the first bracket 52 via a rotating shaft. The second rotating plate 56 is rotatably connected to the end of the first rotating plate 55 away from the first bracket 52 via a rotating shaft. The light source adjustment device 5 also includes an adjustment component, which is installed on the first bracket 52.

[0032] As shown in Figures 1, 2, 3, 4, and 5, auxiliary device 2 assists in the oxidation test of the product to be tested, constant temperature device 3 is used to maintain the temperature inside cabinet 1, the product to be tested is placed on telescopic rotating device 4, the telescopic rotating device 4 rotates the product to be tested to make it oxidize evenly, and light source adjustment device 5 is used to adjust the test light source from multiple angles to improve the uniformity of light illumination on the product to be tested.

[0033] As shown in Figures 6, 7, and 8, the adjustment assembly includes: a first motor 57, a second motor 58, a rotating ring 59, a reflective ring 510, a lamp plate 511, and a heat sink 512. The first motor 57 is fixedly mounted on a first bracket 52, and the second motor 58 is fixedly mounted on a second bracket 53. The rotating shaft of the rotating frame 54 is fixedly connected to the output shaft of the second motor 58. The rotating shaft of the first rotating plate 55 is fixedly connected to the output shaft of the first motor 57. The reflective ring 510 is fixedly mounted on the lower side of the rotating ring 59, the lamp plate 511 is fixedly mounted on the reflective ring 510, and the heat sink 512 is fixedly mounted on the lamp plate 511. The adjustment assembly also includes: a focusing assembly and a limiting assembly. The focusing assembly is mounted on the lower side of the rotating ring 59, and the limiting assembly is mounted on the light-shielding ring 51.

[0034] The light panel 511 is equipped with various lamps, including ultraviolet lamps and infrared lamps, to conduct light illumination tests on the products to be tested.

[0035] The output shaft of the first motor 57 of the light source adjustment device 5 rotates, driving the first rotating plate 55 to rotate. The rotation of the first rotating plate 55 drives the second rotating plate 56 to rotate. The rotation of the second rotating plate 56 drives the rotating ring 59 to rotate back and forth. The rotation of the rotating ring 59 drives the reflective ring 510 to rotate back and forth. The output shaft of the second motor 58 rotates, driving the rotating frame 54 to rotate. The rotation of the rotating frame 54 drives the rotating ring 59 to rotate left and right. The rotation of the rotating ring 59 drives the reflective ring 510 to rotate left and right and back and forth, which is beneficial to the left and right and back and forth rotation of the reflective ring 510.

[0036] The limiting component includes an extension rod 513 and a limit switch 514. Multiple extension rods 513 are fixedly installed on the inner side wall of the light-shielding ring 51, and the limit switch 514 is fixedly installed on the end of the extension rod 513 away from the light-shielding ring 51.

[0037] The first rotating plate 55 and the rotating frame 54 rotate and contact the limit switch 514. The limit switch 514 can be electrically connected to an external controller. The external controller can be a DC_A288_UN IoT Android motherboard produced by Dingchang Electronics. The limit switch 514 limits the rotation. The limit switch 514 transmits an electrical signal to the controller, which controls the first motor 57 and the second motor 58 to stop rotating, thereby limiting the rotation angle of the first rotating plate 55 and the rotating frame 54.

[0038] Example 2: In some embodiments, as shown in Figures 1-9, as a preferred embodiment of this utility model, the focusing assembly includes: a fixed rod 515, a sliding frame 516, a lens 517, a third motor 518, and a threaded rod 519. The fixed rod 515 is fixedly installed on the right side of the reflective ring 510. The right side of the sliding frame 516 is slidably connected to the fixed rod 515, and the left side of the sliding frame 516 is slidably connected to the reflective ring 510. The lens 517 is fixedly installed on the sliding frame 516. The third motor 518 is fixedly installed on the left side of the reflective ring 510. The upper side of the threaded rod 519 is fixedly connected to the output shaft of the third motor 518, and the lower side of the threaded rod 519 is threadedly connected to the left side of the sliding frame 516. The lens 517 can be configured as a convex lens.

[0039] The output shaft of the third motor 518 of the focusing component rotates, driving the threaded rod 519 to rotate. The rotation of the threaded rod 519 drives the sliding frame 516 to move up and down. The up and down movement of the sliding frame 516 drives the lens 517 to move up and down. The up and down movement of the lens 517 changes the distance from the lamp panel 511, resulting in different focusing effects of the lens 517 on the light emitted by the lamps on the lamp panel 511. This allows for rapid adjustment of the illumination range and intensity, which is beneficial for quickly focusing or diffusing the illumination effect.

[0040] As shown in Figures 4, 5, and 9, the telescopic rotating device 4 includes: a rotating rod 41, a worm gear 42, a fourth motor 43, and a worm 44. The rotating rod 41 is rotatably connected to the cabinet 1. The worm gear 42 is fixedly installed on the lower side of the rotating rod 41. The fourth motor 43 is fixedly installed on the lower side of the cabinet 1. The worm 44 is fixedly connected to the output shaft of the fourth motor 43. The worm 44 and the worm gear 42 mesh with each other.

[0041] The telescopic and rotating device 4 further includes: a moving rod 45, a support platform 46, and a limiting screw 47. The moving rod 45 is slidably connected to the rotating rod 41, and the support platform 46 is fixedly installed on the upper side of the moving rod 45. Two slots 48 are opened on the moving rod 45, and multiple limiting screws 47 are threadedly connected to the rotating rod 41. One end of the limiting screw 47 is set in the slot 48.

[0042] Loosen the limiting screw 47 of the telescopic rotation device 4, and quickly move the moving rod 45 up and down. The up and down movement of the moving rod 45 drives the support platform 46 to move up and down. After adjusting the support platform 46 to the appropriate position, tighten the limiting screw 47. The output shaft of the fourth motor 43 rotates, which drives the worm gear 44 to rotate. The rotation of the worm gear 44 drives the worm wheel 42 to rotate. The rotation of the worm wheel 42 drives the rotating rod 41 to rotate. The rotation of the rotating rod 41 drives the moving rod 45 to rotate. The two slots 48 opened on the moving rod 45, through the limiting screw 47, help to increase the friction between the moving rod 45 and the rotating rod 41, which is conducive to quickly adjusting the height of the support platform 46.

[0043] As shown in Figures 4 and 5, the auxiliary device 2 includes an ozone generator 21, a sulfur dioxide generator 22, and a material storage box 23. The ozone generator 21 is fixedly installed on the left rear side of the cabinet 1, the sulfur dioxide generator 22 is fixedly installed on the left front side of the cabinet 1, and the material storage box 23 is fixedly installed on the left lower side of the cabinet 1.

[0044] Ozone generator 21 supplies ozone gas into cabinet 1, and sulfur dioxide generator 22 supplies sulfur dioxide gas into cabinet 1 to perform yellowing resistance and aging tests on the products to be tested in cabinet 1.

[0045] As shown in Figure 4, the constant temperature device 3 includes: a heating plate 31, a cabinet door 32, a sealing strip 33, an exhaust fan 34, and a solenoid valve 35. Multiple heating plates 31 are fixedly installed inside the cabinet body 1. The cabinet door 32 is hinged to the cabinet body 1. The sealing strip 33 is fixedly installed on the cabinet door 32. Two exhaust fans 34 are fixedly installed on the rear side of the cabinet body 1. The solenoid valve 35 is fixedly connected to the output end of the exhaust fan 34. When the solenoid valve 35 is opened, the exhaust fan 34 is started to quickly expel the toxic gas inside the cabinet body 1.

[0046] A temperature sensor is placed inside the cabinet 1 and is electrically connected to an external controller. The heating plate 31 heats the cabinet 1 periodically. The temperature inside the cabinet 1 is continuously detected by the temperature sensor inside the cabinet 1 and the external controller. The heating plate 31 is electrically connected to the external controller, and the external controller controls the heating plate 31 to maintain a constant temperature inside the cabinet 1. The cabinet door 32 and the sealing strip 33 are used to seal the cabinet 1.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multifunctional yellowing resistance testing device, comprising a cabinet (1), characterized in that, Also includes: The cabinet includes an auxiliary device (2), a constant temperature device (3), a telescopic rotation device (4), and a light source adjustment device (5). The auxiliary device (2) is installed on the left side of the cabinet (1), the constant temperature device (3) is installed on the right side of the cabinet (1), the telescopic rotation device (4) is installed in the middle area on the right side of the cabinet (1), and the light source adjustment device (5) is installed on the upper right side of the cabinet (1). The light source adjustment device (5) includes: a light-shielding ring (51), a first bracket (52), a second bracket (53), a rotating frame (54), a first rotating plate (55), and a second rotating plate (56). The light-shielding ring (51) is fixed. The first bracket (52) is fixedly installed on the upper side inside the cabinet (1), the second bracket (53) is fixedly installed on the left side of the light-shielding ring (51), the rotating frame (54) is rotatably connected to the second bracket (53) through a rotating shaft, the first rotating plate (55) is rotatably connected to the first bracket (52) through a rotating shaft, and the second rotating plate (56) is rotatably connected to the end of the first rotating plate (55) away from the first bracket (52) through a rotating shaft. The light source adjustment device (5) further includes an adjustment component, which is installed on the first bracket (52).

2. The multifunctional yellowing resistance testing device according to claim 1, characterized in that, The adjustment assembly includes: a first motor (57), a second motor (58), a rotating ring (59), a reflector ring (510), a lamp plate (511), and a heat sink (512). The first motor (57) is fixedly mounted on a first bracket (52), the second motor (58) is fixedly mounted on a second bracket (53), the rotating shaft of the rotating frame (54) is fixedly connected to the output shaft of the second motor (58), the rotating shaft of the first rotating plate (55) is fixedly connected to the output shaft of the first motor (57), the reflector ring (510) is fixedly mounted on the lower side of the rotating ring (59), the lamp plate (511) is fixedly mounted on the reflector ring (510), and the heat sink (512) is fixedly mounted on the lamp plate (511).

3. The multifunctional yellowing resistance testing device according to claim 2, characterized in that, The adjustment assembly further includes a light-concentrating assembly and a limiting assembly, wherein the light-concentrating assembly is installed on the lower side of the rotating ring (59) and the limiting assembly is installed on the light-shielding ring (51).

4. The multifunctional yellowing resistance testing device according to claim 3, characterized in that, The focusing assembly includes: a fixed rod (515), a sliding frame (516), a lens (517), a third motor (518), and a threaded rod (519). The fixed rod (515) is fixedly installed on the right side of the reflective ring (510). The right side of the sliding frame (516) is slidably connected to the fixed rod (515), and the left side of the sliding frame (516) is slidably connected to the reflective ring (510). The lens (517) is fixedly installed on the sliding frame (516). The third motor (518) is fixedly installed on the left side of the reflective ring (510). The upper side of the threaded rod (519) is fixedly connected to the output shaft of the third motor (518), and the lower side of the threaded rod (519) is threadedly connected to the left side of the sliding frame (516).

5. The multifunctional yellowing resistance testing device according to claim 1, characterized in that, The telescopic rotating device (4) includes: a rotating rod (41), a worm gear (42), a fourth motor (43), and a worm (44). The rotating rod (41) is rotatably connected to the cabinet (1). The worm gear (42) is fixedly installed on the lower side of the rotating rod (41). The fourth motor (43) is fixedly installed on the lower side of the cabinet (1). The worm (44) is fixedly connected to the output shaft of the fourth motor (43). The worm (44) and the worm gear (42) mesh with each other.

6. The multifunctional yellowing resistance testing device according to claim 5, characterized in that, The telescopic rotating device (4) further includes: a moving rod (45), a support platform (46), and a limiting screw (47). The moving rod (45) is slidably connected to the rotating rod (41). The support platform (46) is fixedly installed on the upper side of the moving rod (45). Two slots (48) are opened on the moving rod (45). Multiple limiting screws (47) are threadedly connected to the rotating rod (41). One end of the limiting screw (47) is set in the slot (48).

7. The multifunctional yellowing resistance testing device according to claim 1, characterized in that, The auxiliary device (2) includes an ozone generator (21), a sulfur dioxide generator (22), and a material storage box (23). The ozone generator (21) is fixedly installed on the left rear side of the cabinet (1), the sulfur dioxide generator (22) is fixedly installed on the left front side of the cabinet (1), and the material storage box (23) is fixedly installed on the left lower side of the cabinet (1).

8. The multifunctional yellowing resistance testing device according to claim 1, characterized in that, The constant temperature device (3) includes: heating plate (31), cabinet door (32), sealing strip (33), exhaust fan (34) and solenoid valve (35). Multiple heating plates (31) are fixedly installed inside the cabinet (1). The cabinet door (32) is hinged to the cabinet (1). The sealing strip (33) is fixedly installed on the cabinet door (32). Two exhaust fans (34) are fixedly installed on the rear side of the cabinet (1). The solenoid valve (35) is fixedly connected to the output end of the exhaust fan (34).

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