A ventilation device for packaging and printing workshop

Abstract

The present invention relates to the technical field of ventilation and air exchange devices, and specifically to a ventilation and air exchange device for a packaging and printing workshop, comprising an exhaust duct and an air intake duct, both of which penetrate a wall, and are respectively provided with an exhaust fan and an air intake fan inside the exhaust duct and the air intake duct, and also comprises an air exchange box, and the outer ends of the exhaust duct and the air intake duct extend into the top inner side and the bottom inner side of the air exchange box respectively; the present invention has a drying mechanism and a humidifying mechanism, and can humidify the air through the humidifying mechanism when the air is relatively dry, and can dehumidify the air through the drying mechanism when the air is relatively humid, so the present invention can maintain indoor ventilation while maintaining indoor air humidity.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation and air exchange devices, in particular to a ventilation and air exchange device used in a packaging and printing workshop. Background Art

[0002] At present, packaging and printing workshops need to be ventilated frequently due to machine heat generation, ink volatilization and machine exhaust gas emissions to keep the indoor air clean and reduce the accumulation of harmful substances, thereby improving indoor air quality and helping workers maintain their health.

[0003] In the conventional technology, fans are usually used directly for ventilation of printing workshops, that is, vents are opened on the wall, and induced draft fans are arranged in the vents to exhaust indoor air to the outside. In the prior art, ventilation ducts are mostly used for ventilation of printing workshops, that is, multiple ventilation ducts are arranged in the workshop, and the ends of the multiple ventilation ducts extend to the outside and are connected to induced draft fans, so as to achieve a uniform ventilation effect.

[0004] The above-mentioned traditional ventilation means and the ventilation means in the prior art can improve the indoor air quality to a certain extent, but they cannot adjust the indoor air humidity. It is well known that the printing workshop needs to maintain appropriate air humidity. Excessive dryness and humidity will affect the quality of printed products and the normal operation of printing equipment. Therefore, in order to maintain ventilation in the printing workshop while maintaining indoor air humidity, we propose a ventilation device for packaging printing workshops. Summary of the invention

[0005] The object of the present invention is to provide a ventilation device for a packaging and printing workshop, so as to solve the problems raised in the above-mentioned background technology.

[0006] The present invention is achieved through the following technical solutions:

[0007] A ventilation device for a packaging printing workshop, comprising an exhaust duct and an intake duct, both of which penetrate a wall, and are respectively provided with an exhaust fan and an intake fan inside the exhaust duct and the intake duct, and further comprising: a ventilation box, the outer ends of the exhaust duct and the intake duct respectively extend into the inner side of the top and the inner side of the bottom of the ventilation box, a partition is provided at the upper position of the interior of the ventilation box, an exhaust port is provided on the top wall of the ventilation box and above the partition, and through holes are provided on both left and right side walls of the middle section of the ventilation box;

[0008] A humidifying mechanism, the humidifying mechanism is arranged on one side of the ventilation box and communicates with a through hole on one side of the ventilation box;

[0009] A drying mechanism, the drying mechanism is arranged outside the ventilation box and located on the opposite side of the humidifying mechanism, and the drying mechanism is communicated with a through hole on the corresponding side of the ventilation box;

[0010] Wherein, an air intake assembly is also provided inside the ventilation box, and the air intake assembly is used to send external air into the drying mechanism or the humidifying mechanism.

[0011] Optionally, the air intake assembly includes an air suction pipe, one end of which is connected to the outside of the ventilation box, the other end of which passes through the partition and extends under the partition, and a first solenoid valve is provided at the bottom of the air suction pipe, and an induced draft fan is also provided inside the air suction pipe.

[0012] Optionally, the humidification mechanism includes a humidification box and an atomizer, a water supply pump and a water tank located inside the humidification box, the humidification box is fixedly connected to the outer wall of the ventilation box, and the water inlet and outlet of the water supply pump are respectively connected to the water tank and the atomizer; a first air pipe is connected to the outer side of the suction pipe, the end of the first air pipe away from the suction pipe is connected to the humidification box, and a second solenoid valve is provided on the first air pipe.

[0013] Optionally, the drying mechanism includes a drying box, which is fixedly connected to the outer wall of the ventilation box, a sealing plate is provided inside the drying box, a drying component is provided inside the drying box and located on the side of the sealing plate facing away from the ventilation box, a ventilation pipe is provided on the sealing plate, and a third solenoid valve is provided on the ventilation pipe; a first air hole and a second air hole are respectively provided on the top wall of the drying box and located on the left and right sides of the drying component, the distance between the first air hole and the sealing plate is greater than the distance between the second air hole and the sealing plate, the first air hole and the second air hole are respectively connected to a first branch pipe and a second branch pipe, and the first branch pipe and the second branch pipe are commonly connected to the suction pipe through a three-way valve; a third air hole is provided on the bottom wall of the drying box and located directly below the first air hole, a fourth air hole is provided on the bottom wall of the drying box and located between the sealing plate and the ventilation box, a connecting pipe is commonly connected between the third air hole and the fourth air hole, and a fourth solenoid valve is provided on the connecting pipe.

[0014] Optionally, the drying component includes an assembly plate fixedly arranged inside the drying box, first through holes are symmetrically opened on both sides of the top surface of the assembly plate, two second through holes are opened on the top surface of the assembly plate and located in the middle, a first drying section and a second drying section are respectively attached to both sides of the top surface of the assembly plate, a third drying section is arranged below the assembly plate, the first drying section includes a first box body and a first drying layer, the bottom wall of the first box body has a first outlet hole, and a first air inlet hole is opened on the side wall of the first box body and located on the side of the first drying layer away from the assembly plate; the second drying section It includes a second box body and a second drying layer, the bottom wall of the second box body has a second outlet hole, the top wall of the second box body is provided with a second air inlet hole, when the first outlet hole and the second outlet hole are respectively aligned with the two first through holes, the two second through holes are located between the first drying section and the second drying section; the third drying section includes a third box body and a third drying layer, the top surface of the third box body is provided with a blocking ring, the top surface of the third box body and the inner side of the blocking ring is provided with a first through tube, the bottom wall of the third box body is provided with a third outlet hole, and the top end of the blocking ring is fixedly connected to the bottom surface of the assembly plate.

[0015] Optionally, the drying component further comprises a bidirectional cylinder, which is fixedly disposed inside the drying box, and two movable ends of the bidirectional cylinder are respectively fixedly connected to the first drying part and the second drying part.

[0016] Optionally, third through holes are symmetrically provided on both sides of the top surface of the assembly plate and between the two first through holes, and a second through tube is connected between the third through holes and the top wall of the third box body. When the first outlet hole and the second outlet hole are respectively aligned with the two third through holes, the first through hole and the second through hole are both in a closed state.

[0017] Optionally, a fourth through hole is provided on the top surface of the assembly plate and located below the first drying section, the fourth through hole is located between the second through hole and the third through hole, and a third through tube is connected between the fourth through hole and the top wall of the third box body; a T-shaped rod is provided on the inner side of the first air inlet hole; a connecting hole is provided on the side wall of the second box body and located at a position opposite to the first air inlet hole, a sealing frame is provided on the inner wall of the second box body and located at the position of the connecting hole, a sealing block is connected to the sealing frame through a spring, and in a natural state, the sealing block is embedded in the connecting hole; when the first drying section and the second drying section are attached, the first outlet hole is aligned with the fourth through hole, and the T-shaped rod abuts against the sealing block, and the sealing block is moved out of the connecting hole.

[0018] Optionally, it also includes a humidity sensor and a controller, the signal output end of the humidity sensor is connected to the controller, and the signal output end of the controller is electrically connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the three-way valve and the two-way cylinder.

[0019] Optionally, a filter portion is detachably provided on the inner side of the bottom of the ventilation box, and the filter portion is located above the air intake fan and below the through hole.

[0020] Compared with the prior art, the present invention provides a ventilation device for a packaging printing workshop, which has the following beneficial effects:

[0021] 1. The present invention has a drying mechanism and a humidifying mechanism. When the air is relatively dry, the humidifying mechanism can be used to increase humidity. When the air is relatively humid, the drying mechanism can be used to dehumidify the air. Therefore, the present invention can maintain indoor ventilation and air exchange while maintaining indoor air humidity.

[0022] 2. The present invention has a sensor for detecting indoor humidity and a controller for controlling a plurality of electromagnetic valves. Therefore, when the indoor air humidity is higher or lower than the standard threshold, the controller can automatically control the opening and closing of the corresponding electromagnetic valves, thereby changing the air flow channel to achieve the effect of automatic drying or humidification;

[0023] 3. The present invention has three drying parts, wherein the first drying part and the second drying part can move toward each other, thereby changing the air flow channel and controlling the number of times the air is dried. Therefore, the present invention can automatically control the degree of air drying according to the degree of indoor air humidity, thereby helping to keep the indoor air humidity always within the standard threshold, and also helping to save the amount of desiccant used and the frequency of desiccant replacement;

[0024] 4. In the present invention, the ventilation box is detachably connected to the exhaust duct and the intake duct. When the ventilation box is not needed, the ventilation box can be removed, so that the ventilation effect can be achieved simply by using the exhaust fan and the intake fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the back side of the structure of the present invention;

[0027] Figure 3 It is a side sectional view of the structure of the present invention;

[0028] Figure 4 It is a partial cross-sectional view of the front side of the structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the assembly board structure of the present invention;

[0030] Figure 6 This is a cross-sectional view of the drying oven of the present invention in the first state;

[0031] Figure 7 This is a cross-sectional view of the drying oven of the present invention in the second state;

[0032] Figure 8 This is a cross-sectional view of the drying oven of the present invention in the third state;

[0033] Fig. 9 for Figure 8 The corresponding figure is enlarged at point A in the middle.

[0034] In the figure: 100, exhaust duct; 101, exhaust fan; 200, intake duct; 201, intake fan; 300, ventilation box; 301, partition; 302, exhaust port; 303, through hole; 304, suction duct; 305, induced draft fan; 306, first solenoid valve; 307, filter; 308, first air pipe; 309, second solenoid valve; 400, humidification mechanism; 401, humidification Wet box; 402, atomizer; 403, water supply pump; 404, water tank; 500, drying mechanism; 501, drying box; 502, sealing plate; 503, third solenoid valve; 504, first air hole; 505, second air hole; 506, first branch pipe; 507, second branch pipe; 508, three-way valve; 509, third air hole; 510, fourth air hole; 511, connecting pipe; 512, fourth Solenoid valve; 513, assembly plate; 514, first through hole; 515, second through hole; 516, first drying section; 5161, first box; 5162, first drying layer; 5163, first outlet hole; 5164, first air inlet hole; 517, second drying section; 5171, second box; 5172, second drying layer; 5173, second outlet hole; 5174, second air inlet hole; 518, third drying section; 5181, third box; 5182, third drying layer; 5183, blocking ring; 5184, first through tube; 5185, third outlet hole; 519, two-way cylinder; 520, third through hole; 521, second through tube; 522, fourth through hole; 523, third through tube; 524, blocking frame; 525, blocking block; 600, humidity sensor; 700, controller. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1- Fig. 9 A ventilation device for a packaging printing workshop includes an exhaust duct 100 and an intake duct 200, both of which penetrate the wall, and the exhaust duct 100 and the intake duct 200 are respectively provided with an exhaust fan 101 and an intake fan 201 inside. The present invention also includes a ventilation box 300, a humidifying mechanism 400 and a drying mechanism 500, wherein the outer ends of the exhaust duct 100 and the intake duct 200 extend into the top inner side and the bottom of the ventilation box 300 respectively. On the inner side, the ventilation box 300 is detachably fixedly connected to the exhaust duct 100 and the intake duct 200. A partition 301 is provided at the upper part of the interior of the ventilation box 300. An exhaust port 302 is provided on the top wall of the ventilation box 300 and above the partition 301. Through holes 303 are provided on the left and right side walls of the middle section of the ventilation box 300. After the exhaust fan 101 is turned on, the indoor air is drawn into the inner side of the top of the ventilation box 300 and discharged from the exhaust port 302 on the side wall of the ventilation box 300.

[0037] Furthermore, an air intake assembly is also provided inside the air exchange box 300, such as Figure 3 As shown, the air intake assembly includes an air suction pipe 304, one end of which is connected to the outside of the ventilation box 300, and the other end of the air suction pipe 304 passes through the partition 301 and extends under the partition 301, and a first solenoid valve 306 is provided at the bottom of the air suction pipe 304, and an induced draft fan 305 is also provided inside the air suction pipe 304; that is, the air suction pipe 304 is used to suck outside air into the interior of the ventilation box 300.

[0038] In addition, a filter unit 307 is detachably provided on the inner side of the bottom of the ventilation box 300. Figure 3 As shown, the filter unit 307 is located above the air intake fan 201 and below the through hole 303; the filter unit 307 is used to filter the air entering the room. When the air intake fan 201 and the induced draft fan 305 are turned on at the same time, the induced draft fan 305 is used to suck the outside air into the ventilation box 300, and the air intake fan 201 is used to send the air in the ventilation box 300 into the room.

[0039] Furthermore, the humidifying mechanism 400 is disposed on one side of the ventilation box 300 and communicates with the through hole 303 on one side of the ventilation box 300. Figure 4As shown; the humidification mechanism 400 includes a humidification box 401 and an atomizer 402, a water supply pump 403 and a water tank 404 located inside the humidification box 401. The humidification box 401 is fixedly connected to the outer wall of the ventilation box 300, and the water inlet and outlet of the water supply pump 403 are respectively connected to the water tank 404 and the atomizer 402; the first air pipe 308 is connected to the outer side of the air suction pipe 304, and the end of the first air pipe 308 away from the air suction pipe 304 is connected to the humidification box 401, and a second solenoid valve 309 is provided on the first air pipe 308. Among them, the atomizer 402 can use the atomizer core in the existing common air humidifiers on the market. When the atomizer 402 is turned on, the air enters the humidification box 401 from the first air pipe 308 and is humidified. The humidified air can enter the ventilation box 300 again through the corresponding through hole 303.

[0040] On the other hand, the drying mechanism 500 is arranged outside the ventilation box 300 and is located on the opposite side of the humidifying mechanism 400. The drying mechanism 500 is communicated with the through hole 303 on the corresponding side of the ventilation box 300; the drying mechanism 500 includes a drying box 501, which is fixedly connected to the outer wall of the ventilation box 300, and a sealing plate 502 is provided inside the drying box 501. A drying component is provided inside the drying box 501 and on the side of the sealing plate 502 facing away from the ventilation box 300, a ventilation pipe is provided on the sealing plate 502, and a third solenoid valve 503 is provided on the ventilation pipe; the top wall of the drying box 501 and on the left and right sides of the drying component are respectively provided with a first air hole 504 and a second air hole 505, the first The distance between the air hole 504 and the sealing plate 502 is greater than the distance between the second air hole 505 and the sealing plate 502. The first air hole 504 and the second air hole 505 are respectively connected to the first branch pipe 506 and the second branch pipe 507, and the first branch pipe 506 and the second branch pipe 507 are connected to the suction pipe 304 through the three-way valve 508. A third air hole 509 is provided on the bottom wall of the drying box 501 and is located directly below the first air hole 504. A fourth air hole 510 is provided on the bottom wall of the drying box 501 and is located between the sealing plate 502 and the ventilation box 300. A connecting pipe 511 is connected between the third air hole 509 and the fourth air hole 510, and a fourth solenoid valve 512 is provided on the connecting pipe 511. Among them, the two ends of the three-way valve 508 are respectively connected to the first branch pipe 506 and the second branch pipe 507, and the other end of the three-way valve 508 is connected to the suction pipe 304 through a pipeline. The three-way valve 508 is used to control the airflow into the first branch pipe 506 or the second branch pipe 507.

[0041] Specifically, the present invention also includes a humidity sensor (600KZWS-01) and a controller 700 (model STM32F103C8T6). The signal output end of the humidity sensor 600 is connected to the controller 700. The signal output end of the controller 700 is electrically connected to the first solenoid valve 306, the second solenoid valve 309, the third solenoid valve 503, the fourth solenoid valve 512, the three-way valve 508, the atomizer 402 and the water supply pump. The humidity sensor 600 and the controller 700 are both arranged indoors. When the humidity sensor 600 detects that the indoor humidity of the printing workshop is within the standard range, the controller 700 controls the first solenoid valve 306 to open, and the other solenoid valves are all in a closed state. At this time, the induced draft fan 305 draws the outside air into the ventilation box 300, and then the air intake fan 201 sends the air in the ventilation box 300 into the room. When the indoor air humidity of the printing workshop is lower than the standard threshold, the controller 700 controls the second solenoid valve 309 and the atomizer 402 to open, and the other solenoid valves are in a closed state. At this time, the induced draft fan 305 draws the outside air into the humidification box 401, and the humidified air passes through the through hole 303 and enters the ventilation box 300 again, and finally enters the room under the action of the intake fan 201.

[0042] In one embodiment of the present application, the drying assembly includes an assembly plate 513 fixedly disposed inside the drying box 501, such as Figure 7As shown, first through holes 514 are symmetrically provided on both sides of the top surface of the assembly plate 513, and two second through holes 515 are provided on the top surface of the assembly plate 513 and located in the middle. A first drying section 516 and a second drying section 517 are respectively attached to both sides of the top surface of the assembly plate 513, that is, the first drying section 516 and the second drying section 517 are attached to the top surface of the assembly plate 513 but are not connected, and a third drying section 518 is provided below the assembly plate 513. The first drying section 516 includes a first box body 5161 and a first drying layer 5162. The bottom wall of the first box body 5161 has a first outlet hole 5163, and the side wall of the first box body 5161 and located on the side of the first drying layer 5162 away from the assembly plate 513 is provided with a first air inlet hole 5164; the second drying section 517 includes a second The second box body 5171 and the second drying layer 5172, the bottom wall of the second box body 5171 has a second outlet hole 5173, the top wall of the second box body is provided with a second air inlet hole 5174, when the first outlet hole 5163 and the second outlet hole 5173 are respectively aligned with the two first through holes 514, the two second through holes 515 are both located between the first drying section 516 and the second drying section 517; the third drying section 518 includes a third box body 5181 and a third drying layer 5182, the top surface of the third box body 5181 is provided with a blocking ring 5183, the top surface of the third box body 5181 and located on the inner side of the blocking ring 5183 is provided with a first through tube 5184, the bottom wall of the third box body 5181 is provided with a third outlet hole 5185, and the top end of the blocking ring 5183 is fixedly connected to the bottom surface of the assembly plate 513.

[0043] Specifically, the drying layer is composed of a box body made of a metal mesh structure and desiccant particles located in the box body. When the air passes through the drying layer, the moisture in the air will be absorbed by the desiccant, thereby achieving the effect of drying the air.

[0044] Furthermore, the drying assembly also includes a two-way cylinder 519, which is fixedly arranged inside the drying box 501, and the two movable ends of the two-way cylinder 519 are respectively fixedly connected to the first drying section 516 and the second drying section 517. A third through hole 520 is symmetrically provided on both sides of the top surface of the assembly plate 513 and between the two first through holes 514. A second through tube 521 is connected between the third through hole 520 and the top wall of the third box body 5181. When the first outlet hole 5163 and the second outlet hole 5173 are respectively aligned with the two third through holes 520, the first through hole 514 and the second through hole 515 are both in a closed state. The two-way cylinder 519 is used to control the first drying section 516 and the second drying section 517 to move closer to or farther from each other, and the signal output end of the controller 700 is electrically connected to the two-way cylinder 519.

[0045] It should be noted that, when the first outlet hole 5163 and the second outlet hole 5173 are aligned with the two first through holes 514 respectively, part of the air entering the drying box 501 passes through the first drying section 516, part passes through the second drying section 517, and the other part passes through the third drying section 518 and finally enters the ventilation box 300 through the through hole 303; when the first outlet hole 5163 and the second outlet hole 5173 are aligned with the two third through holes 520 respectively, part of the air passes through the first drying section 516 and then enters the third drying section 518, and the other part of the air passes through the second drying section 517 and then enters the third drying section 518, that is, the air is dried twice; obviously, the first state is suitable for situations where the air humidity is relatively light, and the second state is suitable for situations where the air humidity is relatively severe.

[0046] Furthermore, a fourth through hole 522 is provided on the top surface of the assembly plate 513 and located below the first drying section 516, and the fourth through hole 522 is located between the second through hole 515 and the third through hole 520, and a third through tube 523 is connected between the fourth through hole 522 and the top wall of the third box body 5181; a T-shaped rod is provided on the inner side of the first air inlet hole 5164; a connecting hole is provided on the side wall of the second box body 5171 and located at a position directly opposite to the first air inlet hole 5164, and a blocking frame 524 is provided on the inner wall of the second box body 5171 and located at the position of the connecting hole, and a blocking block 525 is connected to the blocking frame 524 through a spring, and in a natural state, the blocking block 525 is embedded in the connecting hole; when the first drying section 516 and the second drying section 517 are fitted together, the first outlet hole 5163 is aligned with the fourth through hole 522, and the T-shaped rod abuts against the blocking block 525, and the blocking block 525 is moved out of the connecting hole. When the first drying portion 516 and the second drying portion 517 are not in contact, the connecting hole is blocked by the blocking block 525. When the first drying portion 516 and the second drying portion 517 are in contact, the blocking block 525 is moved out of the connecting hole due to the pushing action of the T-bar, so the connecting hole is in an open state.

[0047] In summary, in this embodiment, the air humidity has four standard thresholds, namely the first standard value, the second standard value, the third standard value and the fourth standard value, and the four standard thresholds are arranged from low to high. When the air humidity is lower than the first standard value, it means that the air is too dry, so humidification is required. At this time, the controller 700 controls the second solenoid valve 309 to open, and the other valves are closed to allow air to enter the humidification box 401; when the air humidity is between the first standard value and the second standard value, it means that the air humidity is moderate. At this time, the controller 700 controls the first solenoid valve 306 to open, and the other valves are closed to allow air to directly enter the ventilation box 300.

[0048] When the air humidity is between the second standard value and the third standard value, the controller 700 controls the three-way valve 508 and the third solenoid valve 503 to open, and the other valves to close, wherein the three-way valve 508 only allows air to enter the first branch pipe 506. At the same time, the controller 700 also controls the two-way cylinder 519 to operate, so that the first outlet hole 5163 and the second outlet hole 5173 are aligned with the two first through holes 514 respectively; at this time, the air enters the drying box 501 from the first branch pipe 506, and after being dried in the three drying parts, it enters the ventilation box 300 through the ventilation pipe.

[0049] When the air humidity is between the third standard value and the fourth standard value, the controller 700 controls the three-way valve 508 and the third solenoid valve 503 to open, and the other valves to close, wherein the three-way valve 508 only allows air to enter the first branch pipe 506. At the same time, the controller 700 also controls the two-way cylinder 519 to operate, so that the first outlet hole 5163 and the second outlet hole 5173 are aligned with the two third through holes 520 respectively; at this time, the air enters the drying box 501 from the first branch pipe 506, and enters the third drying section 518 after being dried by the first drying section 516 and the second drying section 517, and is finally discharged after being dried by the third drying section 518. Therefore, in this state, the air is dried twice, which is suitable for situations where the air humidity is relatively serious.

[0050] When the air humidity is higher than the fourth standard value, the controller 700 controls the three-way valve 508 and the fourth solenoid valve 512 to open, and the other valves are closed, wherein the three-way valve 508 only allows air to enter the second branch pipe 507, and at the same time, the controller 700 also controls the two-way cylinder 519 to operate, so that the first drying section 516 and the second drying section 517 fit each other; at this time, the air enters the drying box 501 from the second branch pipe 507, and then the air passes through the third drying section 518, the first drying section 516 and the second drying section 517 in sequence, and finally enters the ventilation box 300 through the connecting pipe 511, so in this state, the air is dried three times, which is suitable for the most serious air humidity. Obviously, the present invention can control the airflow path according to the different degrees of air humidity, thereby determining the number of times the air is dried, and thus helps to better adjust the air humidity in the printing workshop.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ventilation device for a packaging printing workshop, comprising an exhaust duct (100) and an intake duct (200), wherein the exhaust duct (100) and the intake duct (200) both penetrate a wall, and an exhaust fan (101) and an intake fan (201) are respectively arranged inside the exhaust duct (100) and the intake duct (200), characterized in that: Also includes: A ventilation box (300), wherein the outer ends of the exhaust duct (100) and the intake duct (200) extend into the inner side of the top and the inner side of the bottom of the ventilation box (300) respectively, a partition (301) is provided at the upper section of the interior of the ventilation box (300), an exhaust port (302) is provided on the top wall of the ventilation box (300) and above the partition (301), and through holes (303) are provided through the left and right side walls of the middle section of the ventilation box (300); A humidifying mechanism (400), the humidifying mechanism (400) being arranged on one side of the ventilation box (300) and communicating with a through hole (303) on one side of the ventilation box (300); A drying mechanism (500), the drying mechanism (500) being arranged outside the ventilation box (300) and located on the opposite side of the humidifying mechanism (400), the drying mechanism (500) being in communication with a through hole (303) on a corresponding side of the ventilation box (300); The ventilation box (300) is further provided with an air intake assembly inside, and the air intake assembly is used to send outside air into the drying mechanism (500) or the humidifying mechanism (400); The air intake assembly comprises an air suction pipe (304), one end of the air suction pipe (304) is in communication with the outside of the ventilation box (300), the other end of the air suction pipe (304) passes through the partition (301) and extends below the partition (301), a first solenoid valve (306) is provided at the bottom of the air suction pipe (304), and an induced draft fan (305) is also provided inside the air suction pipe (304); The humidifying mechanism (400) comprises a humidifying box (401) and an atomizer (402), a water supply pump (403) and a water tank (404) located inside the humidifying box (401); the humidifying box (401) is fixedly connected to the outer wall of the ventilation box (300); the water inlet and outlet of the water supply pump (403) are respectively connected to the water tank (404) and the atomizer (402); a first air pipe (308) is connected to the outer side of the air suction pipe (304); an end of the first air pipe (308) away from the air suction pipe (304) is connected to the humidifying box (401), and a second solenoid valve (309) is provided on the first air pipe (308); The drying mechanism (500) comprises a drying box (501), the drying box (501) being fixedly connected to the outer wall of the ventilation box (300), a sealing plate (502) being provided inside the drying box (501), a drying component being provided inside the drying box (501) and located on a side of the sealing plate (502) facing away from the ventilation box (300), a ventilation pipe being provided on the sealing plate (502), and a third solenoid valve (503) being provided on the ventilation pipe; a first air hole (504) and a second air hole (505) being provided on the top wall of the drying box (501) and located on the left and right sides of the drying component, respectively, the distance between the first air hole (504) and the sealing plate (502) being greater than the distance between the second air hole (505) and the sealing plate (502). The first air hole (504) and the second air hole (505) are respectively connected to a first branch pipe (506) and a second branch pipe (507), and the first branch pipe (506) and the second branch pipe (507) are connected to the air suction pipe (304) via a three-way valve (508); a third air hole (509) is provided on the bottom wall of the drying box (501) and is located directly below the first air hole (504); a fourth air hole (510) is provided on the bottom wall of the drying box (501) and is located between the sealing plate (502) and the ventilation box (300); a connecting pipe (511) is connected between the third air hole (509) and the fourth air hole (510), and a fourth solenoid valve (512) is provided on the connecting pipe (511).

2. A ventilation device for packaging and printing workshop according to claim 1, characterized in that: The drying component comprises an assembly plate (513) fixedly arranged inside a drying box (501); first through holes (514) are symmetrically provided on both sides of a top surface of the assembly plate (513); two second through holes (515) are provided on the top surface of the assembly plate (513) and located in the middle; a first drying section (516) and a second drying section (517) are respectively provided on both sides of the top surface of the assembly plate (513); a third drying section (518) is provided below the assembly plate (513); the first drying section (516) comprises a first box body (5161) and a first drying layer (5162); the bottom wall of the first box body (5161) comprises a first outlet hole (5163); a side wall of the first box body (5161) and located on a side of the first drying layer (5162) away from the assembly plate (513) comprises a first air inlet hole (5164); the second drying section (517) comprises a second box body (5171) and a second drying layer (5172), the bottom wall of the second box body (5171) having a second outlet hole (5173), the top wall of the second box body having a second air inlet hole (5174), when the first outlet hole (5163) and the second outlet hole (5173) are respectively aligned with the two first through holes (514), the two second through holes (515) are both located between the first drying section (516) and the second drying section (517); the third drying section (51 8) comprises a third box body (5181) and a third drying layer (5182), the top surface of the third box body (5181) is provided with a blocking ring (5183), the top surface of the third box body (5181) and the inner side of the blocking ring (5183) is provided with a first transparent tube (5184), the bottom wall of the third box body (5181) is provided with a third outlet hole (5185), and the top end of the blocking ring (5183) is fixedly connected to the bottom surface of the assembly plate (513).

3. A ventilation device for packaging and printing workshop according to claim 2, characterized in that: The drying component further comprises a bidirectional cylinder (519), wherein the bidirectional cylinder (519) is fixedly arranged inside the drying box (501), and two movable ends of the bidirectional cylinder (519) are respectively fixedly connected to the first drying part (516) and the second drying part (517).

4. A ventilation device for packaging and printing workshop according to claim 3, characterized in that: Third through holes (520) are symmetrically provided on both sides of the top surface of the assembly plate (513) and between the two first through holes (514); a second through tube (521) is connected between the third through hole (520) and the top wall of the third box body (5181); when the first outlet hole (5163) and the second outlet hole (5173) are respectively aligned with the two third through holes (520), the first through hole (514) and the second through hole (515) are both in a closed state.

5. A ventilation device for packaging and printing workshop according to claim 4, characterized in that: A fourth through hole (522) is provided on the top surface of the assembly plate (513) and located below the first drying section (516); the fourth through hole (522) is located between the second through hole (515) and the third through hole (520); a third through tube (523) is connected between the fourth through hole (522) and the top wall of the third box body (5181); a T-shaped rod is provided on the inner side of the first air inlet hole (5164); a connecting hole is provided on the side wall of the second box body (5171) and located directly opposite to the first air inlet hole (5164). A blocking frame (524) is provided on the inner wall of the second box body (5171) at the position of the connecting hole, and a blocking block (525) is connected to the blocking frame (524) via a spring. In a natural state, the blocking block (525) is embedded in the connecting hole; when the first drying part (516) and the second drying part (517) are in contact, the first outlet hole (5163) is aligned with the fourth through hole (522), and the T-bar abuts against the blocking block (525), and the blocking block (525) is moved out of the connecting hole.

6. A ventilation device for packaging and printing workshop according to claim 5, characterized in that: It also includes a humidity sensor (600) and a controller (700), wherein a signal output end of the humidity sensor (600) is connected to the controller (700), and a signal output end of the controller (700) is electrically connected to the first solenoid valve (306), the second solenoid valve (309), the third solenoid valve (503), the fourth solenoid valve (512), the three-way valve (508), and the bidirectional cylinder (519).

7. The ventilation device for packaging and printing workshop according to claim 1, characterized in that: A filter portion (307) is detachably provided on the inner side of the bottom of the ventilation box (300), and the filter portion (307) is located above the air intake fan (201) and below the through hole (303).

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