Efficient and environmentally friendly drying machine for water-based ink printing

Abstract

The application discloses a high-efficiency environment-friendly water-based ink printing drying machine, which comprises a rack, a drying assembly, an air exhaust assembly, a refrigeration assembly, an air supply device and a control system, wherein the control system is arranged on the outer side of the rack and is signal-connected with each assembly; the rack comprises a bottom cavity and an upper cavity; the refrigeration assembly comprises a compressor, a condenser connected with the compressor, an automatic adjusting system and an evaporator; the condenser is provided with a condensing pipe; and the automatic adjusting system comprises a main control expansion valve and a compensation expansion valve. The water vapor mixed in the air after evaporation is quickly condensed and recovered by the refrigeration assembly, the dryness of the air is improved, and the drying efficiency of the drying machine is improved. The air exhaust assembly and the air supply device are matched with each other, the hot air generated by the drying assembly can be continuously circulated, the drying effect is further improved, and the loss of heat dissipation is reduced. The application has high practicability and strong popularization significance.

Description

Technical Field

[0001] This invention relates to the field of drying processing, and in particular to a high-efficiency and environmentally friendly water-based ink printing dryer. Background Technology

[0002] In the production process of printed products, drying equipment is usually required after the printing process to dry the products. Current printed products are usually ink-printed. In order to make the ink dry quickly after printing, a drying component is usually used to bake and dry the ink. Existing printing ink dryers are usually simply structures with heating rods, heating tubes, lamps, etc., to bake the ink and evaporate the moisture in the ink.

[0003] In recent years, with the increasing global awareness of environmental protection, more and more printing materials are adopting water-based inks, which are more environmentally friendly, due to the poor environmental performance of traditional inks. However, water-based inks have a higher water content than traditional inks, and traditional inks only require surface drying during baking; while water-based inks must be completely dry to prevent the printed content from melting away. However, current ordinary drying equipment is difficult to effectively dry water-based inks completely, and the baking time is long, inefficient, and consumes a lot of energy, which contradicts the concept of energy conservation and environmental protection. Summary of the Invention

[0004] Therefore, it is necessary to provide a high-efficiency and environmentally friendly water-based ink printing dryer to address the shortcomings of existing technologies.

[0005] A high-efficiency and environmentally friendly water-based ink printing dryer includes a frame and a drying component, an exhaust component, a cooling component, an air supply device, and a control system mounted on the frame. The control system is mounted on the outside of the frame and is signal-connected to each component. The frame has a double-layer design, including a bottom cavity and an upper cavity. The drying component is mounted at the bottom of the bottom cavity, which has an air inlet and an air outlet. The upper cavity includes a first accommodating cavity, a second accommodating cavity, and a third accommodating cavity arranged sequentially from the air outlet to the air inlet. The refrigeration assembly includes a compressor and a condenser, an automatic adjustment system, and an evaporator connected to the compressor. The exhaust assembly and the evaporator are installed in the first accommodating cavity, with the exhaust assembly located at the bottom. The evaporator is located on the side wall adjacent to the second accommodating cavity and has a first exhaust port that connects to both the first and second accommodating cavities. The compressor, condenser, and automatic adjustment system are all located in the second accommodating cavity. The condenser is installed on the side wall adjacent to the third accommodating cavity and has a second exhaust port on one side of the third accommodating cavity. The air supply device is installed in the third accommodating cavity, with both ends connected to the air outlet side of the third accommodating cavity and the bottom cavity, respectively. The condenser is equipped with a condenser tube, and the evaporator is equipped with an evaporator tube. The condenser tube, the evaporator tube, and the compressor are connected in a closed loop. The automatic adjustment system includes a main control expansion valve and a compensating expansion valve. The main control expansion valve is connected in series between the condenser tube and the evaporator tube, and the compensating expansion valve is connected in parallel with the main control expansion valve. When the main control expansion valve has reached its maximum opening, but the refrigerant charge is still insufficient, the compensating expansion valve is activated to increase the refrigerant flow.

[0006] During operation, the drying component heats the printed product and turns the water in the ink into water vapor. The water vapor rises to the bottom cavity, and the exhaust component draws the water vapor to the upper cavity, where it passes through the evaporator and condenser for drying. The air supply device blows the dried air downwards to the air inlet of the bottom cavity, and the airflow moves towards the air outlet to carry the water vapor to the evaporator and condenser, thus creating a cycle.

[0007] Furthermore, a natural air inlet is provided on the outer side of the frame, which is connected to the outside and the first accommodating cavity.

[0008] Furthermore, the natural air inlet is also equipped with a hinge that can be rotated open or closed to adjust the opening degree of the natural air inlet.

[0009] Furthermore, the drying assembly includes several sets of electric heating tubes, and the control system can control the electric heating tubes to start and stop and freely adjust the heating power.

[0010] Furthermore, the high-efficiency and environmentally friendly water-based ink printing dryer also includes a product sensing device. The product sensing device is connected to the control system. The product sensing device senses the product and sends a signal to the control system. The control system adjusts the heating power of the heating tube according to the received signal.

[0011] Furthermore, the exhaust assembly includes one or more exhaust fans, with the air inlet of the exhaust fan located in the bottom cavity and the air outlet located in the first accommodating cavity.

[0012] Furthermore, the air supply device includes a centrifugal fan, and an air supply channel is provided outside the centrifugal fan. The air supply channel is designed in a spiral shape and has two air inlets and one air outlet. The two air inlets are connected to the third accommodating cavity, and the air outlet is connected to the air outlet side of the bottom cavity.

[0013] Furthermore, the control system is also equipped with a pressure alarm device, and the compressor is equipped with a pressure sensor. The pressure alarm device is connected to the pressure sensor and issues a corresponding alarm signal based on the received pressure information.

[0014] Furthermore, a conveying device is provided below the drying assembly, which can convey the printed products to the drying assembly for drying.

[0015] Furthermore, the refrigeration assembly is also equipped with a temperature detection device and a humidity detection device, both of which are connected to an automatic adjustment system. This automatic adjustment system adjusts the opening of the expansion valve according to the temperature and humidity.

[0016] In summary, the beneficial effects of this high-efficiency and environmentally friendly water-based ink printing dryer are as follows: by setting a refrigeration component on the dryer to quickly condense and recover the water vapor mixed in the air after evaporation, the dryness of the air is improved, thereby increasing the drying efficiency of the high-efficiency and environmentally friendly water-based ink printing dryer; by setting an exhaust component and an air supply device to work together, the hot air generated by the drying component can be continuously circulated, which not only further enhances the drying effect but also reduces heat loss; this invention is highly practical and has strong promotional significance. Attached Figure Description

[0017] Figure 1 This is a front structural diagram of a high-efficiency and environmentally friendly water-based ink printing dryer according to the present invention;

[0018] Figure 2 This is a schematic diagram of the reverse side structure of a high-efficiency and environmentally friendly water-based ink printing dryer according to the present invention;

[0019] Figure 3 This is a cross-sectional structural diagram of a high-efficiency and environmentally friendly water-based ink printing dryer according to the present invention.

[0020] Figure 4 for Figure 3 Schematic diagram of the middle frame;

[0021] Figure 5 for Figure 3 Schematic diagram of the structure of the drying component;

[0022] Figure 6 for Figure 3 Schematic diagram of the central exhaust fan assembly;

[0023] Figure 7 for Figure 3 Schematic diagram of the structure of the intermediate cooling component;

[0024] Figure 8 for Figure 3 A schematic diagram of the central air supply device. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0026] like Figures 1 to 8 As shown, the present invention provides a high-efficiency and environmentally friendly water-based ink printing dryer 100, which includes a frame 10 and a drying component 20, an exhaust component 30, a cooling component 40, an air supply device 50 and a control system 60 mounted on the frame 10. The control system 60 is mounted on the outside of the frame 10 and is signal-connected to each component. The frame 10 has a double-layer design, including a bottom cavity 11 and an upper cavity 12. The drying component 20 is mounted at the bottom of the bottom cavity 11, which has an air inlet 111 and an air outlet 112.

[0027] The upper cavity 12 includes a first accommodating cavity 121, a second accommodating cavity 122, and a third accommodating cavity 123 arranged sequentially from the air outlet 112 to the air inlet 111. The refrigeration assembly 40 includes a compressor 41 and a condenser 42, an automatic adjustment system 43, and an evaporator 44 connected to the compressor 41. The exhaust assembly 30 and the evaporator 44 are installed in the first accommodating cavity 121, with the exhaust assembly 30 located at the bottom and the evaporator 44 located at the top. On the side wall adjacent to the second accommodating cavity 122, the evaporator 44 is provided with a first exhaust port (not shown in the figure), which connects the first accommodating cavity 121 and the second accommodating cavity 122. The compressor 41, condenser 42, and automatic adjustment system 43 are all located in the second accommodating cavity 122. The condenser 42 is installed on the side wall adjacent to the third accommodating cavity 123, and the condenser 42 has a second exhaust port (not shown in the figure) on one side of the third accommodating cavity 123. The air supply device 50 is installed in the third accommodating cavity 123, and both ends of the air supply device 50 are respectively connected to the third accommodating cavity 123 and the air outlet 112 of the bottom cavity 11.

[0028] During operation, the drying component 20 heats the printed product and turns the water in the ink into water vapor. The water vapor rises to the bottom cavity 11, and the exhaust component 30 draws the water vapor to the upper cavity 12. The water vapor passes through the evaporator 44 and the condenser 42 in sequence for drying. The air supply device 50 blows the dried air downwards to the air inlet 111 of the bottom cavity 11, and the airflow flows towards the air outlet 112 to carry the water vapor out to the evaporator 44 and the condenser 42, and so on.

[0029] The condenser 42 is provided with a condenser tube 421, and the evaporator 44 is provided with an evaporator tube 441. The condenser tube 421, the evaporator tube 441 and the compressor 41 are connected in a closed loop. The automatic adjustment system 43 includes a main control expansion valve 431 and a compensation expansion valve 432. The main control expansion valve 431 is connected in series between the condenser tube 421 and the evaporator tube 441, and the compensation expansion valve 432 is connected in parallel with the main control expansion valve 431. When the main control expansion valve 431 has reached its maximum opening, but the refrigerant charge is still insufficient, the compensation expansion valve 432 is activated to increase the refrigerant flow.

[0030] Both the condenser coil 421 and the evaporator coil 441 contain refrigerant. The refrigerant in the evaporator 44 absorbs heat, thereby rapidly cooling the surrounding air environment and causing the water vapor contained in the air to liquefy into water droplets and separate from the air. Meanwhile, the condenser 42 releases heat from the refrigerant and heats the dry air, making it more suitable for product drying. The automatic adjustment system 43, through the dual adjustment of two sets of expansion valves, not only improves the service life of the expansion valves but also increases the upper and lower limits of the expansion valve opening, making it more versatile.

[0031] The outer side of the frame 10 is also provided with a natural air inlet 13, which connects to the outside and the first accommodating cavity 121. The natural air inlet 13 is also provided with a hinge 131, which can be rotated open or closed to adjust the opening degree of the natural air inlet 13. The natural air inlet 13 allows outside air to enter the dryer, ensuring smoother air circulation within the dryer cavity and accelerating the drying speed. The hinge 131 on the natural air inlet 13 is similar to a pleated window structure, and the rotation of the hinge 131 can be electrically controlled, adjusting the opening degree to control the amount of outside air entering the dryer to adapt to different drying power requirements.

[0032] The drying assembly 20 includes several sets of heating elements 21. The control system 60 can control the heating elements 21 to start and stop, and freely adjust their heating power. The high-efficiency and environmentally friendly water-based ink printing dryer 100 also includes a product sensing device (not shown). The product sensing device is connected to the control system 60. The product sensing device senses the product and sends a signal to the control system 60. The control system 60 adjusts the heating power of the heating elements 21 according to the received signal. When the product sensing device senses a product, the control system 60 can control the heating elements 21 to instantly (within 1 second) heat up to the set drying temperature value; and when the product is removed, it can control the heating elements 21 to gradually decrease to the standby temperature value.

[0033] In this invention, the control system 60 can also control the drying component 20 to perform dynamic and periodic heating. Specifically, after the heating element 21 is activated, it can instantly (within 1 second) rise to the set drying temperature value, then maintain it for 10 seconds, and then gradually decrease to the standby temperature value, thus cycling in this way. This ensures the drying effect while avoiding the problem of high energy consumption caused by maintaining high-intensity heating for a long time, thus saving energy significantly.

[0034] The exhaust assembly 30 includes one or more exhaust fans 31. The air inlet of the exhaust fan 31 is located in the bottom cavity 11, and the air outlet is located in the first accommodating cavity 121. The exhaust assembly 30 can continuously transport the humid air in the bottom cavity 11 upward to the vicinity of the evaporator 44, and then use the cooling effect of the evaporator 44 to liquefy water vapor to obtain dry air.

[0035] The air supply device 50 includes a centrifugal fan 51. An air supply channel 52 is provided outside the centrifugal fan 51. The air supply channel 52 has a spiral design and includes two air inlets 521 and one air outlet 522. The two air inlets 521 are connected to the third accommodating cavity 123, and the air outlet 522 is connected to the air outlet 112 of the bottom cavity 11. When the centrifugal fan 51 is running, its suction action pumps the pre-heated dry air (after initial heating by the condenser 42) from the upper cavity 12 to the bottom cavity 11, where it is further heated by the drying assembly 20 to dry the product.

[0036] The control system 60 is also equipped with a pressure alarm device (not shown), and the compressor 41 is equipped with a pressure sensor (not shown). The pressure alarm device is connected to the pressure sensor and issues a corresponding alarm signal based on the received pressure information. The pressure sensor can monitor the pressure status inside the compressor 41 in real time. When the compressor 41 experiences abnormal pressure, such as insufficient or excessive pressure, the pressure alarm device will issue an alarm to prompt the operator to troubleshoot and handle the situation promptly.

[0037] A conveying device (not shown) is also provided below the drying assembly 20. The conveying device can transport the printed products to the area below the drying assembly 20 for drying. During the drying process, the uniform conveying speed of the product by the conveying device ensures more even heating and drying of the product surface, resulting in higher quality products.

[0038] The refrigeration component 40 is also equipped with a temperature detection device (not shown) and a humidity detection device (not shown). Both the temperature detection device and the humidity detection device are connected to an automatic adjustment system 43, which adjusts the opening of the expansion valve according to the temperature and humidity. The temperature and humidity sensors detect the ambient temperature and humidity and feed them back to the control system 60. The control system 60 automatically adjusts the power of the refrigeration component 40 according to the set parameters, enabling the dryer to dry products with a humidity of over 85% to a humidity of approximately 4%-25%.

[0039] In operation, the product is first placed at the bottom of the dryer. The dryer is then started and preset parameters such as temperature and humidity are set. The product, after ink printing, is conveyed at a constant speed through the drying assembly 20 via a conveyor device. The near-infrared shortwave emitted by the drying assembly 20 dries the product surface at high temperature. During the drying process, moisture on the product surface forms water vapor, which mixes with the air in the bottom chamber 11. The exhaust assembly 30 then draws the humid air from the bottom chamber 11 to the vicinity of the evaporator 44 in the upper chamber 12. The evaporator 44 cools and re-liquefies the water vapor in the air, leaving dry, cold air to flow towards the condenser 42. The condenser 42 dissipates heat, raising the temperature of the dry, cold air, resulting in hot, dry air. This hot air is then pumped back from the upper chamber 12 to the bottom chamber 11 by the centrifugal fan 51, where the drying assembly 20 further heats and dries the product surface. The dry, hot air carries away the water vapor, forming humid air, which is then drawn back to the upper cavity 12 by the exhaust fan 30 for dehumidification, and the cycle continues.

[0040] During the operation of the refrigeration unit 40, the automatic adjustment system 43, temperature detection device, and humidity detection device also work simultaneously. The two expansion valves of the automatic adjustment system 43 adjust their opening degrees in real time to control the flow rate according to changes in the load on the evaporator 44, ensuring that the refrigeration unit 40 always maintains high operating efficiency. The temperature and humidity detection devices detect the ambient temperature and humidity and feed them back to the control system 60, which then automatically adjusts the power of the refrigeration unit 40 according to the set parameters to achieve optimal performance.

[0041] In summary, the beneficial effects of the high-efficiency and environmentally friendly water-based ink printing dryer 100 of the present invention are as follows: by setting a refrigeration component 40 on the dryer to quickly condense and recover the water vapor mixed in the air after evaporation, the dryness of the air is improved, thereby improving the drying efficiency of the high-efficiency and environmentally friendly water-based ink printing dryer 100; the exhaust component 30 and the air supply device 50 are set up to cooperate with each other, so that the hot air generated by the drying component 20 can be continuously circulated, which further enhances the drying effect and reduces the loss of heat; the present invention is highly practical and has strong promotional significance.

[0042] The embodiments described above illustrate only one implementation of the invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the scope of protection of the invention. Therefore, the scope of protection of the invention patent should be determined by the appended claims.

Claims

1. A high-efficiency and environmentally friendly water-based ink printing dryer, characterized in that: The system includes a frame and, mounted on the frame, a drying assembly, a ventilation assembly, a cooling assembly, an air supply device, and a control system. The control system is located on the outside of the frame and is signal-connected to each assembly. The frame has a double-layer design, comprising a bottom cavity and an upper cavity. The drying assembly is located at the bottom of the bottom cavity and includes several sets of heating elements. The control system can individually control the heating elements to start and stop and freely adjust their heating power. The bottom cavity has an air inlet and an air outlet. A conveying device is also located below the drying assembly to transport printed products to the area below the drying assembly for drying. The upper cavity includes a first accommodating cavity, a second accommodating cavity, and a third accommodating cavity arranged sequentially from the air outlet to the air inlet. The refrigeration assembly includes a compressor and a condenser, an automatic adjustment system, and an evaporator connected to the compressor. The exhaust assembly and the evaporator are installed in the first accommodating cavity, with the exhaust assembly located at the bottom. The evaporator is located on the side wall adjacent to the second accommodating cavity and has a first exhaust port that connects the first and second accommodating cavities. The compressor, condenser, and automatic adjustment system are all located in the second accommodating cavity, and the condenser is installed on the side wall adjacent to the third accommodating cavity. On the side wall, the condenser has a second exhaust port on one side of the third accommodating cavity; the air supply device is installed inside the third accommodating cavity, and both ends of the air supply device are respectively connected to the air outlet side of the third accommodating cavity and the bottom cavity; the air supply device includes a centrifugal fan, and an air supply channel is provided outside the centrifugal fan. The air supply channel is designed in a spiral shape and has two air inlets and one air outlet. The two air inlets are connected to the third accommodating cavity, and the air outlet is connected to the air outlet side of the bottom cavity; the condenser is provided with condensing tubes, the evaporator is provided with evaporating tubes, and the condensing tubes, evaporating tubes, and compressor are connected in a closed loop. The automatic adjustment system... The system includes a main control expansion valve and a compensating expansion valve. The main control expansion valve is connected in series between the condenser tube and the evaporator tube, and the compensating expansion valve is connected in parallel to the main control expansion valve. When the main control expansion valve has reached its maximum opening, but the refrigerant charge is still insufficient, the compensating expansion valve is activated to increase the refrigerant flow. The refrigeration assembly is also equipped with a temperature detection device and a humidity detection device, both of which are connected to an automatic adjustment system. This automatic adjustment system adjusts the opening of the expansion valve according to the temperature and humidity. A natural air inlet is also provided on the outside of the frame, which connects to the outside and the first accommodating cavity. The natural air inlet is also equipped with a hinge, which can be rotated to open or close to adjust the opening of the natural air inlet. The high-efficiency and environmentally friendly water-based ink printing dryer also includes a product sensing device. The product sensing device is connected to the control system. The product sensing device senses the product and sends the signal to the control system. The control system adjusts the heating power of the electric heating tube according to the received signal. During operation, the drying component heats the printed product and turns the water in the ink into water vapor. The water vapor rises to the bottom cavity, and the exhaust component draws the water vapor to the upper cavity, where it passes through the evaporator and condenser for drying. The air supply device blows the dried air downwards to the air inlet of the bottom cavity, and the airflow moves towards the air outlet to carry the water vapor to the evaporator and condenser, thus creating a cycle.

2. The high-efficiency and environmentally friendly water-based ink printing dryer as described in claim 1, characterized in that: The ventilation assembly includes one or more ventilation fans, with the air inlet of the ventilation fan located in the bottom cavity and the air outlet located in the first accommodating cavity.

3. The high-efficiency and environmentally friendly water-based ink printing dryer as described in claim 1, characterized in that: The control system is also equipped with a pressure alarm device, and the compressor is equipped with a pressure sensor. The pressure alarm device is connected to the pressure sensor and issues a corresponding alarm signal based on the received pressure information.

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