Drying equipment of printing machine

Abstract

The drying equipment of the printing machine comprises a drying box, an air inlet is formed in the top face of the drying box, a drying device is arranged below the air inlet, the drying device is located in the drying box, and the drying device sucks air around the air inlet and heats the air to form drying gas; the drying device conveys drying gas to cloth to be dried in the drying box, a control unit is arranged on the outer side of the drying box, the drying device detects the temperature of the drying gas and transmits the temperature to the control unit, and the control unit receives temperature data and compares the temperature data with a preset value. And the control unit adjusts the heating temperature of the drying device to the air, so that the temperature of the drying gas in the drying box reaches a preset value, and the temperature of the dried cloth is changed. The temperature of the drying gas is changed through cooperation of the control unit and the drying device, and the effect that the drying temperature is automatically adjusted to the preset value to adapt to drying of different pieces of cloth is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing and dyeing equipment, in particular to a drying equipment of a printing machine. BACKGROUND

[0002] Printing and dyeing of cloth is also a processing method of cloth, and is also a general term of pretreatment, dyeing, printing, finishing, washing and the like. After the pretreatment, the cloth is usually transported to a drying equipment to dry the water in the cloth, so as to reduce the possibility of affecting the quality of the cloth due to long-time retention of water.

[0003] The existing cloth drying device is to install a heating pipe in a drying box, and the heating pipe heats the air in the drying box to dry the cloth. However, the heating temperature of the heating pipe is usually fixed, and the real temperature in the drying process cannot be exactly known. The drying temperature required by different cloths is also different. Too high temperature will damage the cloth, and too low temperature will make the drying effect poor.

[0004] According to the related technology in the above, the applicant believes that there is a defect that the drying temperature cannot be automatically adjusted to the set temperature to adapt to the drying of different cloths, thereby affecting the drying effect. CONTENT OF THE INVENTION

[0005] In order to accurately adjust the drying temperature to adapt to the drying of different cloths, the present application provides a drying equipment of a printing machine.

[0006] The drying equipment of the printing machine provided by the present application adopts the following technical scheme:

[0007] A drying equipment of a printing machine, comprising a drying box, an air inlet is arranged on the top surface of the drying box, a drying device is arranged below the air inlet, the drying device is located inside the drying box, the drying device inhales the air around the air inlet and heats to form drying gas, the drying device delivers the drying gas to the cloth to be dried in the drying box, a control unit is arranged on the outside of the drying box, the drying device detects the temperature of the drying gas and transmits it to the control unit, the control unit receives the temperature data and compares it with the preset value, and the control unit adjusts the heating temperature of the drying device to the air to make the temperature of the drying gas in the drying box reach the preset value, so as to change the temperature of the drying cloth.

[0008] The drying box comprises an upper box body and a lower box body, the upper box body is fixedly arranged on the top surface of the lower box body, and a part of the bottom surface of the upper box body connected with the top surface of the lower box body is in through communication.

[0009] By adopting the above technical scheme, the temperature in the drying box is detected and fed back to the control unit while the drying device is used to increase the temperature in the drying box, and the control unit is used to adjust the temperature in the drying box to the preset value, so as to change the temperature of the drying cloth, thereby achieving the effect of automatically adjusting the drying temperature to the preset value to adapt to the drying of different cloths.

[0010] Optionally, the drying device comprises;

[0011] The heating assembly is arranged below the air inlet in the vertical direction, is fixed in the upper box, and is electrically connected with the control unit outside the lower box.

[0012] The air supply assembly is arranged below the heating assembly in the vertical direction, is fixed in the lower box, and is provided with a transmission device in the middle portion.

[0013] The recovery assembly is fixed outside the drying box, is connected to one side of the outer wall of the air inlet at one end, is connected to the outer wall of the side away from the control unit of the lower box at the other end, and is connected between the inside of the upper box and the inside of the lower box.

[0014] By adopting the above technical scheme, the heating assembly is added to heat the air entering from the air inlet, the heating assembly is used to deliver the heated air to the drying box through the air supply assembly to dry the cloth, the heating assembly is used to detect the temperature in the drying box and feed back to the control unit, the control unit is used to adjust the heating temperature of the heating assembly, so as to change the temperature of the drying cloth, the recovery assembly is added on one side of the drying box, the waste heat gas in the drying box is delivered to the air inlet through the gas pipeline, the temperature of the gas around the air inlet is increased, the gas with waste heat enters the drying box through the air inlet, and the additional energy consumption for heating the gas to the set temperature is effectively reduced, and the energy consumption of the equipment is reduced.

[0015] Optionally, the transmission device comprises three guide rollers and two pressing roller assemblies, the three guide rollers are respectively rotatably connected to the inner walls on both sides of the lower box in the length direction, one of the three guide rollers is closer to the bottom surface of the lower box than the other two guide rollers, and the two pressing roller assemblies are respectively fixed to the outer walls on both sides of the lower box in the width direction.

[0016] By adopting the above technical scheme, the cloth is uniformly transmitted through the inside of the drying box under the transmission of the two pressing roller assemblies, three guide rollers with different heights are added to the inner walls on both sides of the lower box in the length direction, the cloth moving on the guide rollers is tensioned, the cloth is fully unfolded, and the occurrence of wrinkles affecting the drying effect is prevented.

[0017] Optionally, the heating assembly comprises an electric fan, an electrically controlled heating pipe group, a first connecting line, a second connecting line and a temperature sensing element, the electric fan is fixedly arranged inside the upper box body, the electric fan is provided below in the vertical direction with the electrically controlled heating pipe group, the electric fan drives the airflow to flow from the air inlet to the electrically controlled heating pipe group, one end of the electrically controlled heating pipe group is electrically connected with the first connecting line, the other end of the first connecting line is electrically connected with the control unit, the temperature sensing element is fixedly arranged on one side of the air supply assembly, one end of the temperature sensing element is electrically connected with the second connecting line, and the other end of the second connecting line is electrically connected with the control unit.

[0018] By adopting the above technical scheme, the heating assembly is additionally provided with the temperature sensing element, the temperature sensing element can detect the drying temperature in the drying box, the temperature sensing element is electrically connected with the control unit through the second connecting line, the temperature sensing element can transmit the detected temperature data to the control unit, the control unit compares the data transmitted by the temperature sensing element with the preset temperature value, and then sends a regulation instruction, the control unit is electrically connected with the electrically controlled heating pipe group through the first connecting line, the control unit transmits the regulation instruction to the electrically controlled heating pipe group, and the electrically controlled heating pipe group changes the temperature correspondingly to adjust the temperature in the drying box.

[0019] Optionally, the air supply assembly comprises an upper air supply box, a lower air supply box and two air supply pipes, the upper air supply box is located directly below the electrically controlled heating pipe group, the upper air supply box is provided on one side with the temperature sensing element, one end of the temperature sensing element penetrates through one side of the upper air supply box and extends into the inner cavity of the upper air supply box, and the other end of the temperature sensing element is fixedly arranged on the outer wall of one side of the upper air supply box; the bottom surface of the upper air supply box is provided with a plurality of upper air outlets, the inner cavities of the upper air outlets are communicated with the inside of the upper air supply box, and the two sides of the upper air supply box in the width direction are respectively connected with one end of the air supply pipes; the two air supply pipes are located inside the lower box body, and the other ends of the two air supply pipes are respectively connected with the two sides of the lower air supply box in the width direction; the lower air supply box is fixedly arranged on the bottom surface of the inner cavity of the lower box body, and the top surface of the lower air supply box is provided with a plurality of lower air outlets; the inner cavities of the lower air outlets are communicated with the inside of the lower air supply box; and the lower box body is further connected with the recycling assembly between the upper air supply box and the lower air supply box.

[0020] By adopting the above technical scheme, the air supply assembly is provided with the upper air supply box and the lower air supply box, which are respectively located on the upper and lower surfaces of the cloth, so that the upper and lower surfaces of the cloth can be blown by the hot air, and the cloth is dried more uniformly; a large number of upper air outlets and lower air outlets are respectively arranged on the upper air supply box and the lower air supply box, so that the gas flow is stronger, and the drying effect is better.

[0021] Optionally, the recycling assembly comprises a recycling box, a one-way valve and a gas conveying pipeline, one side of the recycling box is connected to the side of the lower box body away from the control unit in the length direction, the recycling box is provided with an opening at the connection part with the lower box body, the opening side of the recycling box is in communication with the inside of the lower box body, the other side of the recycling box is connected to one end of the gas conveying pipeline, the other end of the gas conveying pipeline is connected to the outer wall of one side of the gas inlet and penetrates through the outer wall of one side of the gas inlet, the other end of the gas conveying pipeline is in communication with the inside of the gas inlet, and the inside of the end of the gas conveying pipeline close to the recycling box is provided with a one-way valve, and the one-way valve extends out of the outer wall of the pipeline and is provided with a valve switch.

[0022] By adopting the above technical scheme, the recycling assembly is additionally arranged on one side of the drying box, the one-way valve is arranged at one end of the gas conveying pipeline to control the discharge of the gas in the drying box, the heating assembly forms negative pressure at the upper end of the gas inlet, the gas around the gas inlet enters the gas inlet, the one-way valve is opened, the gas with residual heat in the drying box is sucked into the conveying pipeline due to the negative pressure at the upper end of the gas inlet and is conveyed to the gas inlet, the temperature of the gas around the gas inlet is improved, the gas with residual heat is immediately circulated and conveyed to the drying box, the additional energy consumption for heating the gas to the set temperature is effectively reduced, and the energy consumption of the equipment is reduced.

[0023] Optionally, the top of the gas inlet is provided with a filter cover, the area of the filter cover is greater than that of the gas inlet, and the top of the filter cover is connected to a handle.

[0024] By adopting the above technical scheme, the filter cover is arranged on the gas inlet to prevent the particulate impurities in the air from entering the gas inlet and blowing to the dried cloth, so that the particulate impurities do not pollute the cloth.

[0025] Optionally, the pressing roller assembly comprises a fixed plate, a gas cylinder, a first pressing roller and a second pressing roller, the fixed plate is fixedly arranged on one side of the lower box body in the width direction, two gas cylinders are respectively connected to the two ends of the fixed plate, the output ends of the two gas cylinders respectively penetrate through the fixed plate, the output ends of the two gas cylinders are connected to the first pressing roller, the first pressing roller moves up and down in the vertical direction driven by the two gas cylinders, the second pressing roller is fixedly arranged on one side of the lower box body in the width direction, the second pressing roller is located below the first pressing roller, and one side of the second pressing roller is provided with a servo motor.

[0026] By adopting the above technical scheme, the fixed plate and the second pressing roller are fixed on one side of the lower box body, the first pressing roller fixed on the fixed plate limits the cloth by the up-and-down lifting of the gas cylinder, and the rotating second pressing roller drives the cloth to move at a uniform speed.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. The drying device detects the temperature in the drying box and feeds back to the control unit while raising the temperature in the drying box, and the control unit adjusts the heating temperature of the drying device to the preset value, thereby changing the temperature of the dried cloth, achieving the effect of automatically adjusting the drying temperature to the preset value to adapt to the drying of different cloths.

[0029] 2. A recovery assembly is added on one side of the drying box, and the waste heat gas in the drying box is sent to the air inlet through the gas pipeline, thereby raising the temperature of the gas around the air inlet, and the gas with waste heat enters the drying box through the air inlet, effectively reducing the additional energy consumption of heating the gas to the set temperature, and reducing the energy consumption of the equipment.

[0030] 3. A filter cover is arranged at the air inlet to prevent particles and impurities in the air from entering the air inlet and blowing towards the dried cloth, preventing the particles and impurities from polluting the cloth. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic diagram of a drying device of a printing machine according to the present application.

[0032] Figure 2 is an exploded view of a drying device of a printing machine according to the present application.

[0033] Figure 3 is a partial structural schematic diagram of Figure 2 .

[0034] Figure 4 is a left view of a drying device of a printing machine according to the present application.

[0035] Figure 5 is a flow chart of the control unit of a drying device of a printing machine according to the present application.

[0036] BRIEF DESCRIPTION OF DRAWINGS: 1, drying box; 11, upper box body; 12, lower box body; 111, air inlet; 112, filter cover; 1121, handle; 2, drying device; 21, heating assembly; 211, electric fan; 212, electric control heating pipe group; 213, first connecting line; 214, second connecting line; 215, temperature sensing element; 22, air supply assembly; 221, upper air supply box; 222, air supply pipe; 223, lower air supply box; 224, upper air outlet nozzle; 225, lower air outlet nozzle; 23, recovery assembly; 231, recovery box; 232, gas pipeline; 233, one-way valve; 2331, valve switch; 3, transmission device; 31, guide roller; 32, pressure roller assembly; 321, fixed plate; 322, air cylinder; 323, first pressure roller; 324, second pressure roller; 325, servo motor; 4, control unit. DETAILED DESCRIPTION

[0037] The present application will be described in detail below in conjunction with the accompanying drawings. Figures 1-5 The present application will be described in detail below in conjunction with the accompanying drawings.

[0038] The application discloses a drying device of a printing machine.

[0039] With reference to Figure 1 The drying device of the printing machine comprises a drying box 1, which is combined by an upper box body 11 and a lower box body 12, the upper box body 11 is fixed on the top surface of the lower box body 12, the bottom surface of the upper box body 11 is connected with a part of the top surface of the lower box body 12 in a penetrating manner, the top surface of the upper box body 11 is provided with an air inlet 111, a drying device 2 is arranged below the air inlet 111, the drying device 2 inhales air around the air inlet 111 and heats the air to form drying gas, the drying device 2 delivers the drying gas to the fabric to be dried in the lower box body 12, a control unit 4 is arranged on the outer side of the lower box body 12, the drying device 2 detects the temperature of the drying gas and transmits the temperature data to the control unit 4, the control unit 4 compares the temperature data with a preset value, and the control unit 4 adjusts the heating temperature of the drying device 2 to the air so that the temperature of the drying gas in the lower box body 12 reaches the preset value, thereby changing the temperature of the dried fabric.

[0040] With reference to Figure 2 The drying device 2 comprises a heating assembly 21, an air supply assembly 22 and a recovery assembly 23, the heating assembly 21 is arranged below the air inlet 111 in the vertical direction, the heating assembly 21 is fixed in the upper box body 11, the heating assembly 21 introduces the air around the air inlet 111 into the lower box body 12 through the air inlet 111, the heating assembly 21 is electrically connected with the control unit 4 on the outer side of the lower box body 12, the heating assembly 21 transmits the temperature data of the gas flowing into the lower box body 12 to the control unit 4, the control unit 4 compares the temperature data with a preset value and sends an adjustment instruction to the heating assembly 21, the heating assembly 21 receives the adjustment instruction and changes the heating temperature to change the temperature of the drying gas, the air supply assembly 22 is arranged below the heating assembly 21 in the vertical direction, the air supply assembly 22 is fixed in the lower box body 12, a transmission device 3 is arranged in the middle part of the air supply assembly 22, the transmission device 3 drives the fabric to move horizontally along the width direction of the lower box body 12, the air supply assembly 22 is arranged on the upper side and the lower side of the transmission device 3 and fully dries the fabric, one end of the recovery assembly 23 is connected to one side of the outer wall of the air inlet 111, the other end of the recovery assembly 23 is connected to the outer wall of the side of the lower box body 12 away from the control unit 4 in the length direction, and the recovery assembly 23 connects the inside of the upper box body 11 with the inside of the lower box body 12.

[0041] With reference to Figure 2The transmission device 3 comprises three guide rollers 31 and two pressing roller assemblies 32. The three guide rollers 31 are respectively rotationally connected to the two sides of the length direction inner wall of the lower box body 12. The three guide rollers 31 guide the cloth to move horizontally along the width direction of the lower box body 12. The middle one of the three guide rollers 31 is closer to the bottom surface of the lower box body 12 than the other two guide rollers 31. The two pressing roller assemblies 32 are respectively located on the two sides of the three guide rollers 31. The three guide rollers 31 are staggered and placed, and have a tensioning effect on the moving cloth, so as to prevent the cloth from being wrinkled and affecting the drying effect. The two pressing roller assemblies 32 are respectively fixedly arranged on the outer walls on the two sides of the width direction of the lower box body 12. The two pressing roller assemblies 32 fix the two ends of the cloth and play a limiting role, and drive the cloth to move horizontally along the width direction of the lower box body 12.

[0042] With reference to Figure 2 and Figure 3 The heating assembly 21 comprises an electric fan 211, an electric control heating pipe group 212, a first connecting wire 213, a second connecting wire 214 and a temperature sensing element 215. The electric fan 211 is fixedly arranged in the inside of the upper box body 11. The electric control heating pipe group 212 is arranged below the electric fan 211 in the vertical direction. The rotation of the electric fan 211 forms a negative pressure around the air inlet 111, drives the airflow to flow from the air inlet 111 to the electric control heating pipe group 212. The temperature sensing element 215 is fixedly arranged on one side of the air supply assembly 22. One end of the temperature sensing element 215 is electrically connected to the second connecting wire 214. The other end of the second connecting wire 214 is electrically connected to the control unit 4. One end of the electric control heating pipe group 212 is electrically connected to the first connecting wire 213. The other end of the first connecting wire 213 is electrically connected to the control unit 4. The temperature sensing element 215 detects the temperature of the drying gas and transmits the temperature to the control unit 4 through the second connecting wire 214. The control unit 4 receives the temperature data and compares and analyzes the temperature data with a preset value. The control unit 4 transmits a regulation instruction to the electric control heating pipe group 212 through the first connecting wire 213. The electric control heating pipe group 212 receives the regulation instruction and changes the heating temperature of the electric control heating pipe group 212, so as to change the temperature of the drying gas.

[0043] With reference to Figure 2 and Figure 3The air supply assembly 22 comprises an upper air supply box 221, a lower air supply box 223 and two air supply pipes 222. The upper air supply box 221 is located directly below the electrically controlled heating pipe group 212. The upper air supply box 221 is provided with a temperature sensing element 215 on one side. One end of the temperature sensing element 215 penetrates through one side of the upper air supply box 221 and extends into the inner cavity of the upper air supply box 221. The other end of the temperature sensing element 215 is fixed to the outer wall of one side of the upper air supply box 221. The bottom surface of the upper air supply box 221 is provided with a plurality of upper air outlets 224. The inner cavities of the upper air outlets 224 are connected to the inside of the upper air supply box 221. The drying gas in the upper air supply box 221 is sprayed out through the upper air outlets 224 to dry the cloth. The two sides of the width direction of the upper air supply box 221 are respectively connected to one end of the air supply pipes 222. The two air supply pipes 222 are located inside the lower box body 12 away from the control unit 4 in the length direction. The other ends of the two air supply pipes 222 are respectively connected to the two sides of the width direction of the lower air supply box 223. The two air supply pipes 222 transport the drying gas in the upper air supply box 221 to the lower air supply box 223. The lower air supply box 223 is fixedly arranged on the bottom surface of the inner cavity of the lower box body 12. The top surface of the lower air supply box 223 is provided with a plurality of lower air outlets 225. The inner cavities of the lower air outlets 225 are connected to the inside of the lower air supply box 223. The drying gas in the lower air supply box 223 is sprayed out through the lower air outlets 225 to dry the cloth.

[0044] With reference to Figure 3 and Figure 4The recovery assembly 23 comprises a recovery box 231, a one-way valve 233 and a gas conveying pipe 232. One side of the recovery box 231 is connected to the side of the lower box body 12 away from the control unit 4 in the length direction. The recovery box 231 is provided with an opening at the connection part with the lower box body 12. The opening side of the recovery box 231 is in communication with the inside of the lower box body 12, so that the drying gas in the lower box body 12 can enter the recovery box 231. The other side of the recovery box 231 is connected to one end of the gas conveying pipe 232. The other end of the gas conveying pipe 232 is connected to and penetrates through the side outer wall of the air inlet 111, and is in communication with the inside of the air inlet 111. The air inlet 111 is provided with a filter cover 112 at the top. The area of the filter cover 112 is larger than that of the air inlet 111, so that the filter cover 112 can completely cover the air inlet 111. The filter cover 112 prevents the particulate impurities in the air from being blown to the dried cloth through the air inlet 111, so as to prevent the particulate impurities from polluting the cloth. The filter cover 112 is connected to a handle 1121 at the top. The handle 1121 facilitates lifting and pulling the filter cover 112, and facilitates the replacement of the filter cover 112 by the operator. The drying gas in the recovery box 231 can be transmitted to the air inlet 111 through the gas conveying pipe 232. The one-way valve 233 is arranged in the inside of the end of the gas conveying pipe 232 close to the recovery box 231. The one-way valve 233 extends out of the outer wall of the gas conveying pipe 232 and is provided with a valve switch 2331. The one-way valve 233 is arranged at the end of the gas conveying pipe 232 to control the discharge of the gas in the lower box body 12 to the air inlet 111. When the one-way valve 233 is opened, the gas in the lower box body 12 with residual heat is sucked into the gas conveying pipe 232 by the negative pressure generated at the upper end of the air inlet 111, and is conveyed to the air inlet 111 through the gas conveying pipe 232. The drying gas increases the temperature of the gas around the air inlet 111. The drying gas with residual heat is then circulated and conveyed to the lower box body 12, so as to effectively reduce the additional energy consumption for heating the gas to the set temperature, and reduce the energy consumption of the equipment in use.

[0045] With reference to Figure 4The pressing roller assembly 32 comprises a fixed plate 321, air cylinders 322, a first pressing roller 323 and a second pressing roller 324. The fixed plate 321 is fixed on one side of the lower cabinet 12 in the width direction. Two air cylinders 322 are respectively connected to the two ends of the fixed plate 321. The output ends of the two air cylinders 322 respectively penetrate the fixed plate 321. The output ends of the two air cylinders 322 are connected to the first pressing roller 323. The first pressing roller 323 is driven by the two air cylinders 322 to move up and down in the vertical direction. The first pressing roller 323 moves downward to press the cloth. The second pressing roller 324 is fixed on one side of the lower cabinet 12 in the width direction and is located below the first pressing roller 323. A servo motor 325 is arranged on one side of the second pressing roller 324. The servo motor 325 drives the second pressing roller 324 to rotate. The cloth is placed on the second pressing roller 324. The first pressing roller 323 presses the cloth through the air cylinders 322 to fix the cloth. The servo motor 325 on the second pressing roller 324 is started to drive the cloth to move horizontally along the width direction of the lower cabinet 12.

[0046] With reference to Figure 5 When the cloth is dried, the operator sets the drying temperature on the control unit 4. The temperature sensing element 215 detects the temperature of the drying gas and transmits the temperature to the control unit 4 through the second connecting line 214. The control unit 4 receives the temperature data and compares it with the preset value. The control unit 4 transmits the adjustment instruction to the electrically controlled heating tube group 212 through the first connecting line 213. The electrically controlled heating tube group 212 receives the adjustment instruction and changes the heating temperature to change the temperature of the drying gas. The drying device can automatically adjust the drying temperature to the preset value to adapt to the drying effect of different cloths.

[0047] The implementation principle of the drying device of the printing machine according to the embodiment of the application is as follows:

[0048] When the printed cloth is dried, the operator sets the drying temperature on the control unit 4. The cloth is driven by the guide roller 31 and the pressing roller assembly 32 to enter the lower cabinet 12. The guide roller 31 and the pressing roller assembly 32 keep the cloth in a tensioned and unfolded state. The drying device 2 inhales the air around the air inlet 111 and heats it to form drying gas. The drying device 2 delivers the drying gas to the cloth to be dried in the lower cabinet 12. The outside of the lower cabinet 12 is provided with the control unit 4. The heating assembly 21 of the drying device 2 detects the temperature of the drying gas and transmits it to the control unit 4. The control unit 4 receives the temperature data and compares it with the preset value. The control unit 4 adjusts the heating temperature of the heating assembly 21 to make the temperature of the drying gas in the lower cabinet 12 reach the preset value, so as to change the temperature of the drying cloth. The drying device can automatically adjust the drying temperature to the preset value to adapt to the drying effect of different cloths.

[0049] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A drying apparatus for a printing machine, characterized in that: The utility model provides a drying box, which comprises a drying box (1), an air inlet (111) is arranged on the top surface of the drying box (1), a drying device (2) is arranged below the air inlet (111), the drying device (2) is located in the drying box (1), the drying device (2) sucks air around the air inlet (111) and heats the air to form drying gas, the drying device (2) delivers the drying gas to the cloth to be dried in the drying box (1), a control unit (4) is arranged on the outer side of the drying box (1), the drying device (2) detects the temperature of the drying gas and transmits the temperature to the control unit (4), the control unit (4) receives the temperature data and compares the temperature data with a preset value, the control unit (4) adjusts the heating temperature of the drying device (2) to the air so that the temperature of the drying gas in the drying box (1) reaches the preset value, thereby changing the temperature of the dried cloth. The drying box (1) comprises an upper box body (11) and a lower box body (12), the upper box body (11) is fixedly arranged on the top surface of the lower box body (12), and a part of the bottom surface of the upper box body (11) connected with the top surface of the lower box body (12) is in through communication.

2. A drying apparatus for a printing machine according to claim 1, characterized in that: The drying device (2) comprises; a heating assembly (21), the heating assembly (21) is arranged below the air inlet (111) in the vertical direction, the heating assembly (21) is fixedly arranged in the upper box body (11), and the heating assembly (21) is electrically connected with the control unit (4) on the outer side of the lower box body (12); an air supply assembly (22), the air supply assembly (22) is arranged below the heating assembly (21) in the vertical direction, the air supply assembly (22) is fixedly arranged in the lower box body (12), and the middle part of the air supply assembly (22) is provided with a transmission device (3); a recovery assembly (23), the recovery assembly (23) is fixedly arranged on the outer side of the drying box (1), one end of the recovery assembly (23) is connected to one side of the outer wall of the air inlet (111), the other end of the recovery assembly (23) is connected to the outer wall of the side of the lower box body (12) away from the control unit (4) in the length direction, and the recovery assembly (23) is in communication with the inside of the upper box body (11) and the inside of the lower box body (12).

3. A drying apparatus for a printing machine according to claim 2, characterised in that: The transmission device (3) comprises three guide rollers (31) and two pressure roller assemblies (32), the three guide rollers (31) are rotatably connected to the inner walls on both sides of the lower box body (12) in the length direction, one of the three guide rollers (31) is closer to the bottom surface of the lower box body (12) than the other two guide rollers (31), and the two pressure roller assemblies (32) are located on both sides of the three guide rollers (31), respectively, and the two pressure roller assemblies (32) are fixedly arranged on the outer walls on both sides of the lower box body (12) in the width direction.

4. A drying apparatus for a printing machine according to claim 2, characterized in that: The heating assembly (21) includes an electric fan (211), an electric control heating pipe group (212), a first connecting line (213), a second connecting line (214) and a temperature sensing element (215), the electric fan (211) is fixed inside the upper box body (11), the electric fan (211) is provided with an electric control heating pipe group (212) below in the vertical direction, the electric fan (211) drives the airflow to flow from the air inlet (111) to the electric control heating pipe group (212), one end of the electric control heating pipe group (212) is electrically connected with the first connecting line (213), the other end of the first connecting line (213) is electrically connected with the control unit (4), the temperature sensing element (215) is fixed on one side of the air supply assembly (22), one end of the temperature sensing element (215) is electrically connected with the second connecting line (214), the other end of the second connecting line (214) is electrically connected with the control unit (4).

5. A drying apparatus for a printing machine according to claim 4, characterised in that: The air supply assembly (22) includes an upper air supply box (221), a lower air supply box (223) and two air supply pipes (222), the upper air supply box (221) is located directly below the electric control heating pipe group (212), one side of the upper air supply box (221) is provided with a temperature sensing element (215), one end of the temperature sensing element (215) penetrates through one side of the upper air supply box (221) and extends into the inner cavity of the upper air supply box (221), the other end of the temperature sensing element (215) is fixed on the outer wall of one side of the upper air supply box (221), the bottom surface of the upper air supply box (221) is provided with a plurality of upper air outlets (224), the inner cavities of the upper air outlets (224) are communicated with the inside of the upper air supply box (221), the width direction sides of the upper air supply box (221) are respectively connected with one end of the air supply pipe (222), the two air supply pipes (222) are located inside the lower box body (12), the other ends of the two air supply pipes (222) are respectively connected with the width direction sides of the lower air supply box (223), the lower air supply box (223) is fixed in the inner cavity bottom surface of the lower box body (12), the top surface of the lower air supply box (223) is provided with a plurality of lower air outlets (225), the inner cavities of the lower air outlets (225) are communicated with the inside of the lower air supply box (223), the lower box body (12) is further connected with the recycling assembly (23) between the upper air supply box (221) and the lower air supply box (223).

6. A drying apparatus for a printing machine according to claim 5, characterized in that: The recovery assembly (23) comprises a recovery tank (231), a one-way valve (233) and a gas pipeline (232), one side of the recovery tank (231) is connected to the side of the lower box body (12) away from the control unit (4) in the length direction, the recovery tank (231) is provided with an opening at the connection part with the lower box body (12), the opening side of the recovery tank (231) is in communication with the inside of the lower box body (12), the other side of the recovery tank (231) is connected to one end of the gas pipeline (232), the other end of the gas pipeline (232) is connected to the side outer wall of the air inlet (111) and penetrates through the side outer wall of the air inlet (111), the other end of the gas pipeline (232) is in communication with the inside of the air inlet (111), the one-way valve (233) is arranged in the end of the gas pipeline (232) close to the recovery tank (231), and the one-way valve (233) extends out of the pipeline outer wall and is provided with a valve switch (2331).

7. A drying apparatus for a printing machine according to claim 6, characterized in that: The air inlet (111) is provided with a filter cover (112) on the top, the area of the filter cover (112) is greater than that of the air inlet (111), and the filter cover (112) is connected with a handle (1121) on the top.

8. A drying apparatus for a printing machine according to claim 3, characterized in that: The roller pressing assembly (32) comprises a fixed plate (321), a gas cylinder (322), a first roller pressing device (323) and a second roller pressing device (324), the fixed plate (321) is fixedly arranged on one side of the lower box body (12) in the width direction, the fixed plate (321) is connected with one gas cylinder (322) at each end, the output ends of the two gas cylinders (322) penetrate through the fixed plate (321) respectively, the output ends of the two gas cylinders (322) are connected with the first roller pressing device (323), the two gas cylinders (322) drive the first roller pressing device (323) to move up and down in the vertical direction, the second roller pressing device (324) is fixedly arranged on one side of the lower box body (12) in the width direction, the second roller pressing device (324) is located below the first roller pressing device (323), and the second roller pressing device (324) is provided with a servo motor (325) on one side.

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