Air energy and infrared heating shoemaking drying equipment

Abstract

The invention discloses air energy and infrared heating shoemaking drying equipment, and relates to the technical field of drying equipment, the air energy and infrared heating shoemaking drying equipment comprises a rack, a plurality of drying ovens, a material conveying device and an infrared heating system, each drying oven is provided with an upper layer drying channel and a lower layer drying channel; the material conveying device comprises an upper-layer material conveying mechanism and a lower-layer material conveying mechanism; the air energy heating system comprises an air energy main machine, a plurality of drying oven upper-layer fin heat exchangers and a plurality of drying oven lower-layer fin heat exchangers, the drying oven upper-layer fin heat exchangers are installed on the inner surfaces of the two side walls of the upper-layer drying channel, and the drying oven lower-layer fin heat exchangers are installed on the inner surfaces of the two side walls of the lower-layer drying channel; the infrared heating system comprises a plurality of groups of infrared radiators; and each group of infrared radiators are respectively arranged on the inner top walls of the upper-layer drying channel and the lower-layer drying channel. The shoemaking drying equipment is high in heating speed and heating efficiency, only one air energy main machine is arranged, and operation and maintenance are convenient.

Description

Technical Field

[0001] This invention relates to the field of drying equipment technology, and in particular to a shoe drying device using air energy and infrared heating. Background Technology

[0002] Drying equipment is used to remove moisture from materials. Its working principle is mainly based on three methods: heat conduction, heat convection, and heat radiation. This causes the moisture on the surface of the material to evaporate, while simultaneously promoting the migration of internal moisture to the surface, thus achieving the drying of the material. Drying equipment is widely used in many industries. For example, in the shoe manufacturing industry, adhesive is typically used to bond the upper and sole of the shoe. Workers or machines evenly apply shoe adhesive to the bonding surfaces of the upper and sole. After application, the upper and sole need to be placed in an oven for drying and activation. After drying at a certain temperature, the adhesive changes from a liquid state to a semi-solid dry film, at which point the adhesive has the strongest adhesion. Pressure is then applied to achieve a tight bond between the upper and sole.

[0003] Ovens based on heat transfer via thermal convection deliver high-temperature refrigerant to the condenser via a compressor. The condenser then transfers the heat from the refrigerant to the corresponding medium, which in turn carries the heat into the oven. The heated air is then blown evenly into the oven through the corresponding air duct by a fan, thus achieving hot air circulation. However, some existing ovens based on heat transfer via thermal convection have the following drawbacks: (1) Relying solely on heat transfer via thermal convection, the heat transfer depends entirely on the flow of hot air. The air must be heated first before the heat is transferred to the material, resulting in energy conversion losses, leading to slow heating speed and low heating efficiency; (2) In production lines using multiple ovens simultaneously, each oven is equipped with a separate air source heat pump, resulting in multiple air source heat pumps being scattered throughout the production line. This makes it difficult for operators to centrally control the heating status of multiple ovens, and operation and maintenance are inconvenient. Summary of the Invention

[0004] The technical problem solved by this invention is to address the deficiencies in the prior art by providing a shoe drying device that uses air source heat pumps and infrared heating. This device has a fast heating speed, high heating efficiency, requires only one air source heat pump unit, and is easy to operate and maintain.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A shoe drying device using air energy and infrared heating, comprising:

[0007] A rack, which extends along a straight line;

[0008] Multiple drying ovens are installed at intervals on the frame. Each drying oven has an upper drying channel and a lower drying channel with openings at both ends. Multiple ventilation holes are evenly distributed on the side walls of the upper and lower drying channels. Multiple circulating fans are installed at intervals on the outer surface of the side walls of the upper and lower drying channels. A left ventilation chamber and a right ventilation chamber are provided above the upper and lower drying channels. The left and right ventilation chambers correspond to the circulating fans on the side walls, and multiple ventilation holes are also evenly distributed on the bottom of the left and right ventilation chambers and on the side walls above the circulating fans.

[0009] A material conveying device, which includes an upper material conveying mechanism and a lower material conveying mechanism;

[0010] An air source heat pump heating system includes an air source heat pump unit, multiple upper finned heat exchangers for ovens, and multiple lower finned heat exchangers for ovens. The air source heat pump unit is installed on the top of one of the ovens. The upper finned heat exchangers are installed on the inner surfaces of the side walls of the upper drying channel, and the lower finned heat exchangers are installed on the inner surfaces of the side walls of the lower drying channel. Both the upper and lower finned heat exchangers are connected to the air source heat pump unit through pipes. The air source heat pump unit is used to provide a high-temperature medium to the upper and lower finned heat exchangers of the ovens.

[0011] The infrared heating system includes multiple sets of infrared radiators, each set of which is installed on the inner top wall of the upper drying channel and the lower drying channel.

[0012] As a further explanation of the above technical solution:

[0013] In the above technical solution, the air source heat pump unit includes a main unit housing and a compressor, a shell-and-tube heat exchanger, an expansion valve, an evaporator, a first water tank, and a second water tank installed inside the main unit housing. The shell-and-tube heat exchanger includes an inner tube and an outer tube coaxially mounted. The compressor, the inner tube of the shell-and-tube heat exchanger, the expansion valve, and the evaporator are connected end-to-end via pipes to form a closed refrigerant circulation loop. The first water tank is connected end-to-end via pipes to the annular gap between the inner and outer tubes of the shell-and-tube heat exchanger to form a closed first water circulation loop. A first water pump is connected to the pipe between the outlet of the first water tank and the inlet of the annular gap of the shell-and-tube heat exchanger. The first water tank is connected end-to-end to the second water tank via pipes to form a closed second water circulation loop. A second water pump is connected to the pipe between the outlet of the first water tank and the inlet of the second water tank. The upper finned heat exchanger of the oven is installed on the inner surface of the two side walls of the upper drying channel, and the lower finned heat exchanger of the oven is installed on the inner surface of the two side walls of the lower drying channel. The upper finned heat exchanger of the oven is connected to the second water tank end to end through a pipe to form a closed third water circulation loop. A third water pump is connected to the pipe between the outlet of the second water tank and the inlet of the upper finned heat exchanger of the oven. The lower finned heat exchanger of the oven is connected to the second water tank end to end through a pipe to form a closed fourth water circulation loop. A fourth water pump is connected to the pipe between the outlet of the second water tank and the inlet of the lower finned heat exchanger of the oven.

[0014] In the above technical solution, the main unit is divided into a first chamber and a second chamber. The compressor, shell and tube heat exchanger, expansion valve, evaporator, first water tank and second water tank are installed in the first chamber, and the evaporator is installed in the second chamber. The evaporator is a finned heat exchanger. Multiple ventilation holes are evenly distributed on both sides of the second chamber. A dual-inlet centrifugal fan corresponding to the evaporator is installed in the second chamber. The air outlet of the dual-inlet centrifugal fan is set upward. The top of the second chamber is equipped with a main unit air outlet duct that communicates with the air outlet of the dual-inlet centrifugal fan.

[0015] In the above technical solution, the air source heat pump unit also includes a filter, a sight glass, a solenoid valve, and a gas-liquid separator. The filter, sight glass, and solenoid valve are connected in sequence between the shell-and-tube heat exchanger and the expansion valve, and the gas-liquid separator is connected between the evaporator and the compressor.

[0016] In the above technical solution, the frame is provided with a chemical treatment station, a primary adhesive application station, a secondary adhesive application station, and a bottom-applying station in sequence along its length. There are three ovens, which are located between the chemical treatment station and the primary adhesive application station, between the primary adhesive application station and the secondary adhesive application station, and between the secondary adhesive application station and the bottom-applying station, respectively. A cold air device is provided above the ovens. The cold air device includes cold air ducts and multiple air curtains. The cold air ducts are located above the multiple ovens. The cold air ducts include a left cold air duct and a right cold air duct that are parallel to each other and arranged along the length of the frame. The left and right cold air ducts are connected to both ends of the main unit's air outlet duct, and multiple cold air outlets are provided on the left and right cold air ducts above the chemical treatment station, the primary adhesive application station, the secondary adhesive application station, and the bottom-applying station, respectively. The air curtains are installed at the cold air outlets and include air direction adjustment boxes.

[0017] In the above technical solution, the shoe drying equipment also includes an exhaust device, which includes an upper exhaust hood, an upper exhaust duct, an exhaust box, a lower exhaust box, a lower exhaust duct, and a filter box. The upper exhaust hood is installed on the frame and located above the chemical treatment station, the primary glue application station, and the secondary glue application station. The exhaust box is installed on the top of the drying oven, and a blower is installed inside the exhaust box with the blower's outlet facing upwards. A blower silencer connected to the blower's outlet is installed on the top of the exhaust box. One end of the upper exhaust duct is connected to the upper exhaust hood, and the other end is connected to the exhaust box. The lower exhaust box is installed on the frame and located on both sides of the chemical treatment station, the primary glue application station, and the secondary glue application station. The lower exhaust box has exhaust vents. The filter box is installed inside the exhaust box and is a rectangular box made of multiple activated carbon mesh panels. One end of the lower exhaust duct is connected to the lower exhaust box, and the other end is connected to the filter box.

[0018] In the above technical solution, the air source heating system also includes two finned heat exchangers for the glue application area. The two finned heat exchangers for the glue application area are respectively installed on the frame and located below the material conveying mechanism of the primary glue application station and the secondary glue application station. The finned heat exchangers for the glue application area are connected to the second water tank end to end through pipes to form a closed fifth water circulation loop. A fifth water pump is connected to the pipe between the outlet of the second water tank and the inlet of the finned heat exchanger for the glue application area.

[0019] In the above technical solution, the material conveying device also includes a top-level material conveying mechanism, which is installed on the frame and located above the upper material conveying mechanism; a first insulation cover is installed at the bottom of the upper material conveying mechanism, a second insulation cover is installed at the bottom of the top-level material conveying mechanism, and a third insulation cover is installed on the frame above the top-level material conveying mechanism; the air source heating system also includes three bottom-contact finned heat exchangers, which are respectively installed inside the first, second, and third insulation covers. Each bottom-contact finned heat exchanger is connected to the second water tank end-to-end through a pipe to form a closed sixth water circulation loop, and a sixth water pump is connected to the pipe between the outlet of the second water tank and the inlet of the bottom-contact finned heat exchanger.

[0020] In the above technical solution, each group of infrared radiators includes multiple infrared heating lamps arranged side by side.

[0021] In the above technical solution, the oven is equipped with an insulated outer shell; curtains are installed at both ends of the upper drying channel and the lower drying channel.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. This invention provides basic heat to the upper and lower drying channels by setting up an air-source heat pump heating system. The upper and lower drying channels can be independently set to different temperatures to meet diverse production needs. The air-source heat pump provides a high-temperature medium to the upper and lower finned heat exchangers of the oven. As the high-temperature medium passes through the upper and lower finned heat exchangers, it transfers heat to the interior of the upper and lower drying channels respectively. An infrared heating system provides auxiliary heating to the upper and lower drying channels. The radiant heater heats the interior of the upper and lower drying channels through thermal radiation. The oven of this invention adopts a dual heating system of air source and infrared. Compared with an oven that only uses an air source heating system (thermal convection heat transfer), it has a faster heating speed, higher heating efficiency, and maintains a balanced and stable temperature. It can adapt to the drying needs of various shoe materials. Compared with an oven that only uses an infrared heating system (thermal radiation), the dual heating system only requires a small amount of electricity to start, making it more energy-efficient. Moreover, if the air source system fails, it will not affect the use of the infrared heating system.

[0024] 2. The air source heating system of the present invention only has one air source heat pump unit, which provides high-temperature medium to the upper finned heat exchangers and lower finned heat exchangers of multiple ovens. This is conducive to the operator's centralized control of the heating status of multiple ovens. It is safe and reliable, easy to operate, install and maintain, and has a low failure rate. The air source heat pump unit is equipped with a PLC intelligent control system, which can flexibly set the heating parameters of the ovens according to different process flows. Attached Figure Description

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

[0026] Figure 2 This is a schematic diagram of the oven structure in this invention;

[0027] Figure 3 This is a schematic diagram of the side wall structure of the oven in this invention;

[0028] Figure 4 This is a schematic diagram of the internal structure of the oven in this invention;

[0029] Figure 5 This is a schematic diagram of the structure of the air source heat pump unit in this invention;

[0030] Figure 6 This is a schematic diagram of the material conveying device at the bottom-feeding station in this invention;

[0031] Figure 7 This is a schematic diagram of the connection structure of the refrigerant circulation loop in this invention;

[0032] Figure 8 This is a schematic diagram of the connection structure of the first water circulation loop, the second water circulation loop, the third water circulation loop, the fourth water circulation loop, and the fifth water circulation loop in this invention.

[0033] Figure 9 This is a schematic diagram of the connection structure of the sixth water circulation loop in this invention;

[0034] Figure 10 This is a schematic diagram of the right-side cold air duct in this invention;

[0035] Figure 11 This is a schematic diagram of the ventilation device in this invention.

[0036] In the diagram: 1. Frame; 11. Chemical treatment station; 12. Primary adhesive application station; 13. Secondary adhesive application station; 14. Bottom-applying station; 2. Drying oven; 21. Upper drying channel; 22. Lower drying channel; 23. Insulation shell; 3. Material conveying device; 31. Upper material conveying mechanism; 32. Lower material conveying mechanism; 33. Top material conveying mechanism; 4. Air source heat pump heating system; 41. Air source heat pump main unit; 411. Main unit housing; 4111. First chamber; 4112. Second chamber 412. Compressor; 413. Shell-and-tube heat exchanger; 414. Expansion valve; 415. Evaporator; 4151. Dual-inlet centrifugal fan; 416. First water tank; 417. Second water tank; 418. Filter; 419. Sight glass; 4190. Solenoid valve; 4191. Gas-liquid separator; 42. Upper finned heat exchanger of the oven; 43. Lower finned heat exchanger of the oven; 44. Finned heat exchanger in the glue application area; 45. Finned heat exchanger in the bottom application area; 5. Lamp mounting slot; 6. Circulating fan; 7. Left 8. Ventilation chamber; 9. Right ventilation chamber; 10. Main unit exhaust duct; 11. Cooling device; 12. Cooling duct; 13. Left cooling duct; 14. Right cooling duct; 15. Air curtain; 16. Air direction adjustment box; 27. Exhaust device; 28. Upper exhaust hood; 29. ​​Upper exhaust duct; 200. Exhaust box; 201. Blower; 202. Fan silencer; 203. Lower exhaust box; 204. Exhaust vent; 205. Lower exhaust duct; 206. Filter Box; 30, First insulation cover; 40, Second insulation cover; 50, Third insulation cover; 60, Ventilation hole; 70, Refrigerant circulation loop; 80, First water circulation loop; 810, First water pump; 90, Second water circulation loop; 910, Second water pump; 100, Third water circulation loop; 110, Third water pump; 200, Fourth water circulation loop; 210, Fourth water pump; 300, Fifth water circulation loop; 310, Fifth water pump; 400, Sixth water circulation loop; 410, Sixth water pump. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings.

[0038] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] like Figure 1-11 As shown, a shoe drying equipment using air energy and infrared heating includes a frame 1, multiple drying ovens 2, a material conveying device 3, an air energy heating system 4, and an infrared heating system.

[0040] Among them, the frame 1 extends along a straight line.

[0041] Multiple drying ovens 2 are installed at intervals on the frame 1, and each drying oven 2 is provided with an upper drying channel 21 and a lower drying channel 22 with openings at both ends. Multiple ventilation holes 60 are evenly distributed on the side walls of the upper drying channel 21 and the lower drying channel 22, and multiple circulating fans 6 are installed at intervals on the outer surface of the side walls of the upper drying channel 21 and the lower drying channel 22. A left ventilation chamber 7 and a right ventilation chamber 8 are provided above the upper drying channel 21 and the lower drying channel 22. The left ventilation chamber 7 and the right ventilation chamber 8 correspond to the circulating fans 6 on the side walls, and multiple ventilation holes 60 are also evenly distributed on the bottom of the left ventilation chamber 7 and the right ventilation chamber 8 and on the side wall above the circulating fans 6. Air in the upper drying channel 21 or the lower drying channel 22 can pass through the ventilation hole 60 on the left side wall, the circulating fan 6 on the left side wall, and the left ventilation chamber 7 in sequence, and finally return to the upper drying channel 21 or the lower drying channel 22, forming a left-side air circulation; air in the upper drying channel 21 or the lower drying channel 22 can also pass through the ventilation hole 60 on the right side wall, the circulating fan 6 on the right side wall, and the right ventilation chamber 8 in sequence, and finally return to the upper drying channel 21 or the lower drying channel 22, forming a right-side air circulation.

[0042] The material conveying device 3 includes an upper material conveying mechanism 31 and a lower material conveying mechanism 32 mounted on the frame 1. The upper material conveying mechanism 31 sequentially passes through the upper drying channels 21 of multiple ovens 2, and the lower material conveying mechanism 32 sequentially passes through the lower drying channels 22 of multiple ovens 2. In this embodiment, the upper material conveying mechanism 31 is used to convey shoe soles, causing them to sequentially pass through the upper drying channels 21 of multiple ovens 2, and the lower material conveying mechanism 32 is used to convey shoe uppers, causing them to sequentially pass through the lower drying channels 22 of multiple ovens 2.

[0043] The air source heating system 4 includes an air source heat pump 41, multiple upper finned heat exchangers 42 and multiple lower finned heat exchangers 43. The air source heat pump 41 is installed on the top of one of the ovens 2. The upper finned heat exchangers 42 are installed on the inner surfaces of the two side walls of the upper drying channel 21, and the lower finned heat exchangers 43 are installed on the inner surfaces of the two side walls of the lower drying channel 22. Both the upper and lower finned heat exchangers 42 and 43 are connected to the air source heat pump 41 through pipes. The air source heat pump 41 provides a high-temperature medium to the upper and lower finned heat exchangers 42 and 43. When the high-temperature medium passes through the upper and lower finned heat exchangers 42 and 43, it can transfer heat to the interior of the upper and lower drying channels 21 and 22, respectively. It should be noted that when the circulating fan 6 is working, the impeller of the circulating fan 6 rotates, which drives the hot air in the upper drying channel 21 or the lower drying channel 22 to circulate, thereby ensuring uniform heating of the material. Only one air source heat pump unit 41 provides high-temperature medium to the upper finned heat exchangers 42 and the lower finned heat exchangers 43 of multiple drying ovens, which facilitates centralized control of the heating status in multiple drying ovens 2 by operators, simplifying operation and subsequent maintenance. The air source heat pump unit 41 is equipped with a PLC intelligent control system, which can flexibly set the heating parameters of the drying oven 2 according to different process flows. The air source heating system 4 can be used not only in shoe drying production lines but also in drying production lines in other industries.

[0044] The infrared heating system includes multiple sets of infrared radiators, each set installed on the inner top wall of the upper drying channel 21 and the lower drying channel 22. In this embodiment, each set of infrared radiators includes multiple infrared heating lamps (not shown in the figure) arranged side by side. Multiple lamp mounting slots 5 are provided on the inner top walls of the upper drying channel 21 and the lower drying channel 22, and the infrared heating lamps are correspondingly installed in the lamp mounting slots 5. This invention provides basic heat to the upper drying channel 21 and the lower drying channel 22 through an air-source heating system 4, and provides auxiliary heating to the upper drying channel 21 and the lower drying channel 22 through infrared lamps. Infrared rays can directly penetrate the air to heat the surface of the material. The dual heating system has a fast heating speed, high heating efficiency, and maintains a balanced and stable temperature, adapting to the drying needs of various shoe materials. If the air-source system malfunctions, it will not affect the use of the infrared heating system. This shoe drying equipment can also be connected to the MES / TPM system to monitor equipment operation data in real time, providing accurate data support for management, helping to make quick decisions, and improving management efficiency.

[0045] refer to Figure 5 , Figure 7 and Figure 8Specifically, the air source heat pump unit 41 includes a main unit housing 411 and a compressor 412, a shell-and-tube heat exchanger 413, an expansion valve 414, an evaporator 415, a first water tank 416, and a second water tank 417 installed inside the main unit housing 411. The shell-and-tube heat exchanger 413 includes an inner tube and an outer tube coaxially mounted. The compressor 412, the inner tube of the shell-and-tube heat exchanger 413, the expansion valve 414, and the evaporator 415 are connected end-to-end by pipes to form a closed refrigerant circulation loop 70. The first water tank 416 is connected end-to-end to the annular gap between the inner and outer tubes of the shell-and-tube heat exchanger 413 by pipes to form a closed first water circulation loop 80. A first water pump 810 is connected to the pipe between the outlet of the first water tank 416 and the inlet of the annular gap of the shell-and-tube heat exchanger 413. The first water tank 416 is connected end-to-end to the second water tank 417 by pipes to form a closed second water circulation loop 80. A water circulation loop 90 is formed, and a second water pump 910 is connected to the pipe between the outlet of the first water tank 416 and the inlet of the second water tank 417. The upper finned heat exchanger 42 of the oven is installed on the inner surface of the two side walls of the upper drying channel 21, and the lower finned heat exchanger 43 of the oven is installed on the inner surface of the two side walls of the lower drying channel 22. The upper finned heat exchanger 42 of the oven is connected to the second water tank 417 end to end through a pipe to form a closed third water circulation loop 100. A third water pump 110 is connected to the pipe between the outlet of the second water tank 417 and the inlet of the upper finned heat exchanger 42 of the oven. The lower finned heat exchanger 43 of the oven is connected to the second water tank 417 end to end through a pipe to form a closed fourth water circulation loop 200. A fourth water pump 210 is connected to the pipe between the outlet of the second water tank 417 and the inlet of the lower finned heat exchanger 43 of the oven.

[0046] The main unit housing 411 is divided into a first chamber 4111 and a second chamber 4112. The compressor 412, the shell-and-tube heat exchanger 413, the expansion valve 414, the evaporator 415, the first water tank 416 and the second water tank 417 are installed in the first chamber 4111. The evaporator 415 is installed in the second chamber 4112. The evaporator 415 is a finned heat exchanger. The second chamber 4112 is equipped with a dual-inlet centrifugal fan 4151 corresponding to the evaporator 415. The air cooled by the dual-inlet centrifugal fan 4151 is transported by the dual-inlet centrifugal fan 4151. The air outlet of the dual-inlet centrifugal fan 4151 is set upward. Multiple ventilation holes 60 are evenly distributed on both sides of the second chamber 4112. The top of the second chamber 4112 is equipped with a main unit air outlet duct 9 that communicates with the air outlet of the dual-inlet centrifugal fan 4151. Outside air flows into the second chamber 4112 through the ventilation holes 60 on the side wall. When the low-temperature, low-pressure refrigerant passes through the evaporator 415 (finned heat exchanger) exposed to the air, the heat in the air is transferred to the refrigerant because the refrigerant is colder than the air, and the liquid refrigerant evaporates into a warm, low-pressure gas. The air passing through the evaporator 415 absorbs heat and its temperature decreases. The cooled air is then drawn into the two inlets of the dual-inlet centrifugal fan 4151. Under the action of the high-speed rotating impeller, the air gains kinetic and pressure energy and is delivered from the outlet of the dual-inlet centrifugal fan 4151 to the main unit's outlet duct 9.

[0047] The air source heat pump unit 41 also includes a filter 418, a sight glass 419, a solenoid valve 4190, and a gas-liquid separator 4191. The filter 418, sight glass 419, and solenoid valve 4190 are connected in sequence between the shell-and-tube heat exchanger 413 and the expansion valve 414. The filter 418 is used to remove solid impurities from the refrigerant and absorb moisture from the refrigerant. The sight glass 419 is a transparent window installed in the pipeline for observing the refrigerant state. The solenoid valve 4190 is used to control the opening and closing of the refrigerant circulation loop 70 according to the needs of the system operation. The gas-liquid separator 4191 is connected between the evaporator 415 and the compressor 412. The gas-liquid separator 4191 is used to separate the gaseous and liquid components in the refrigerant, allowing only the gaseous refrigerant to enter the compressor 412 to avoid the risk of liquid slugging, and retaining the liquid components in the refrigerant and returning them to the evaporator 415.

[0048] refer to Figure 1 and Figure 10The frame 1 has a chemical treatment station 11, a primary glue application station 12, a secondary glue application station 13, and a sole bonding station 14 arranged sequentially along its length. Three ovens 2 are provided, located between the chemical treatment station 11 and the primary glue application station 12, between the primary glue application station 12 and the secondary glue application station 13, and between the secondary glue application station 13 and the sole bonding station 14, respectively. At the chemical treatment station 11, a chemical solution (cleaning agent) is used to wipe or spray the bonding surfaces of the sole and upper, cleaning and activating the surfaces to prepare for subsequent glue application. The chemically treated soles and uppers are then conveyed to… The first oven 2; at the first gluing station 12, the first layer of glue is applied to the prepared surfaces of the sole and upper. After the first gluing, the sole and upper are conveyed to the second oven 2, where the glue dries from a liquid state to a semi-solid dry film. At the second gluing station 13, a second layer of glue is applied to the glued surfaces of the sole and upper to further enhance the bonding strength. After the second gluing, the sole and upper are sent to the third oven 2 for drying and activation, so that the second layer of glue also forms a dry film with the strongest adhesion. At the sole bonding station 14, the glued and activated sole and upper are precisely aligned and pressure is applied to complete the final bonding. A cold air device 10 is provided above the oven 2. The cold air device 10 includes a cold air duct 101 and multiple air curtain machines 102. The cold air duct 101 is located above the multiple ovens 2. The cold air duct 101 includes a left cold air duct 1011 and a right cold air duct 1012 that are parallel to each other and arranged along the length of the frame 1. The left cold air duct 1011 and the right cold air duct 1012 are respectively connected to the two ends of the main unit's air outlet duct 9. The left cold air duct 1011 and the right cold air duct 1012 are respectively provided with multiple cold air outlets above the chemical treatment station 11, the primary glue application station 12, the secondary glue application station 13, and the bottom application station 14. The air curtain machine 102 is installed at the cold air outlet. The air curtain machine 102 includes an air direction adjustment box 1021. The air direction adjustment box 1021 not only supports the adjustment of the wind speed, which can be flexibly switched according to actual needs, but also has a multi-dimensional air direction adjustment function, which can realize precise control in the up and down and left and right directions.

[0049] refer to Figure 1 and Figure 5 The dual-inlet centrifugal fan 4151 delivers cool air to the main unit's outlet duct 9. After being split by the main unit's outlet duct 9, the cool air enters the left cool air duct 1011 and the right cool air duct 1012 respectively, and is discharged from the cool air outlet. This provides comfortable cool air to the operators at the chemical treatment station 11, the primary adhesive application station 12, the secondary adhesive application station 13, and the base coat application station 14, stabilizing the temperature of the work area at around 26°C, creating the most comfortable working temperature, reducing operator fatigue, and thus improving production efficiency.

[0050] refer to Figure 11In this embodiment, the shoe drying equipment further includes an exhaust device 20, which includes an upper exhaust hood 201, an upper exhaust duct 202, an exhaust box 203, a lower exhaust box 204, a lower exhaust duct 205, and a filter box 206. The upper exhaust hood 201 is installed on the frame 1 and located above the chemical treatment station 11, the primary glue application station 12, and the secondary glue application station 13. The exhaust box 203 is installed on the top of the drying oven 2, and a blower 2031 is installed inside the exhaust box 203 to blow air. The air outlet of blower 2031 faces upwards. A fan silencer 2032, connected to the air outlet of blower 2031, is installed on the top of the exhaust box 203. The fan silencer 2032 has a sound-absorbing layer inside, and its installation at the air outlet of blower 2031 reduces the noise generated by blower 2031 during operation. One end of the upper exhaust duct 202 is connected to the upper exhaust hood 201, and the other end is connected to the exhaust box 203. Through blower 2031, upper exhaust duct 202, and upper exhaust hood 201... It can remove dust and floating matter from the high-level areas of the chemical treatment station 11, the primary adhesive application station 12, and the secondary adhesive application station 13; the lower exhaust box 204 is installed on the frame 1 and located on both sides of the chemical treatment station 11, the primary adhesive application station 12, and the secondary adhesive application station 13, and the lower exhaust box 204 is provided with exhaust vents 2041; the filter box 206 is installed inside the exhaust box 203, and the filter box 206 is a rectangular box composed of multiple activated carbon mesh plates; one end of the lower exhaust pipe 205 It is connected to the lower exhaust box 204 at one end and to the filter box 206 at the other end. By setting up the blower 2031, filter box 206, lower exhaust duct 205 and exhaust box, dust, floating objects and harmful gases in the low-level areas of the chemical treatment station 11, primary glue application station 12 and secondary glue application station 13 can be drawn to the filter box 206. After being filtered and purified by the activated carbon mesh plate of the filter box 206, they are discharged from the blower silencer 2032 of the blower 2031, creating a clean working environment.

[0051] refer to Figure 1 and Figure 8 In this embodiment, the air-source heating system 4 further includes two finned heat exchangers 44 for the glue application area. These two finned heat exchangers 44 are respectively installed on the frame 1 and located below the lower material conveying mechanism 32 of the primary glue application station 12 and the secondary glue application station 13. The finned heat exchangers 44 are connected end-to-end to the second water tank 417 via pipes, forming a closed fifth water circulation loop 300. A fifth water pump 310 is connected to the pipe between the outlet of the second water tank 417 and the inlet of the finned heat exchangers 44. The hot water from the second water tank 417 is carried by the fifth water pump 310 to the finned heat exchangers 44 below the primary glue application station 12 and the secondary glue application station 13 to achieve a suitable temperature for the lower material conveying mechanism 32 of the primary glue application station 12 and the secondary glue application station 13. Then, the low-temperature water flows back to the second water tank 417.

[0052] refer to Figure 1 , Figure 6 and Figure 9 In this embodiment, the material conveying device 3 also includes a top-level material conveying mechanism 33, which is mounted on the frame 1 and located above the upper-level material conveying mechanism 31. At the sole bonding station 14, the operator removes the glued soles and uppers conveyed by the upper-level material conveying mechanism 31 and the lower-level material conveying mechanism 32, respectively, precisely aligns the soles and uppers, applies pressure, and completes the final bonding. The bonded soles and uppers are then placed in the top-level material conveying mechanism 33 and conveyed to the next station. Furthermore, the bottom of the upper material conveying mechanism 31 is equipped with a first insulation cover 30, the bottom of the top material conveying mechanism 33 is equipped with a second insulation cover 40, and the frame 1 is equipped with a third insulation cover 50 located above the top material conveying mechanism 33; the air source heating system 4 also includes three bottom-mounted finned heat exchangers 45, which are respectively installed inside the first insulation cover 30, the second insulation cover 40, and the third insulation cover 50. Each bottom-mounted finned heat exchanger 45 is connected to the second water tank 417 end to end through a pipe to form a closed sixth water circulation loop 400, and a sixth water pump 410 is connected to the pipe between the outlet of the second water tank 417 and the inlet of the bottom-mounted finned heat exchanger 45. By setting up a first heat insulation cover 30, a second heat insulation cover 40, and a third heat insulation cover 50 at the bottom-bonding station 14, and installing a bottom-bonding area finned heat exchanger 45 inside each of the first heat insulation cover 30, the second heat insulation cover 40, and the third heat insulation cover 50, respectively, hot water from the second water tank 417 is carried by a sixth water pump 410 to the bottom-bonding area finned heat exchangers 45 of the first heat insulation cover 30, the second heat insulation cover 40, and the third heat insulation cover 50 at the bottom-bonding station 14 for heating, thereby achieving a suitable temperature at the bottom-bonding station 14. The low-temperature water then returns to the second water tank 417, thereby achieving heat preservation of the shoe products at the bottom-bonding station 14 and improving the bonding effect.

[0053] refer to Figure 3 In this embodiment, the oven 2 is provided with an insulating shell 23. The insulating shell 23 blocks the heat transfer between the oven 2 and the external environment, reduces heat loss, maintains a uniform and stable temperature inside the oven 2, and prevents the high temperature inside the upper drying channel 21 and the lower drying channel 22 from being conducted to the insulating shell 23. The surface of the insulating shell 23 has no obvious heat. Both ends of the upper drying channel 21 and the lower drying channel 22 are provided with curtains (not shown in the figure). By setting the curtains, heat insulation is achieved, minimizing the heat loss from the upper drying channel 21 and the lower drying channel 22, significantly reducing energy consumption, and achieving energy saving.

[0054] refer to Figures 7-9 The working principle of the air source heating system 4 in this invention is as follows:

[0055] ① Refrigerant cycle:

[0056] Compressor 412 delivers high-temperature, high-pressure gaseous refrigerant through copper pipes to the inner tube of shell-and-tube heat exchanger 413. Shell-and-tube heat exchanger 413 acts as a condenser. The refrigerant releases heat upon passing through shell-and-tube heat exchanger 413, then passes through filter 418, and then sequentially through sight glass 419, solenoid valve 4190, and expansion valve 414. Expansion valve 414 regulates the refrigerant circulation flow, causing it to cool and depressurize. The refrigerant then absorbs heat and evaporates into a warm, low-pressure gaseous state in evaporator 415 (finned heat exchanger). The air in generator 415 absorbs heat and its temperature decreases. The cooled air is then transported to the cold air duct 101 by the dual-inlet centrifugal fan 4151 and discharged from the outlet of the cold air duct 101. This provides comfortable cool air to the operators at the chemical treatment station 11, the primary adhesive application station 12, the secondary adhesive application station 13, and the bottom-applying station 14. The refrigerant then undergoes gas-liquid separation in the gas-liquid separator 4191 to prevent liquid refrigerant from flowing into the compressor 412. The refrigerant finally reaches the compressor 412 to achieve circulation.

[0057] ② Hot water circulation between the shell-and-tube heat exchanger 413 and the first water tank 416:

[0058] Ordinary pure water (low-temperature water) starts from the first water tank 416 and enters the annular gap between the inner and outer tubes of the shell-and-tube heat exchanger 413 through the first water pump 810 for circulation. The high-temperature and high-pressure gaseous refrigerant in the inner tube of the shell-and-tube heat exchanger 413 transfers heat to the low-temperature pure water in the annular gap. After the pure water is heated, it returns to the first water tank 416.

[0059] ③ Hot water circulation between the second water tank 417 and the first water tank 416:

[0060] The high-temperature water in the first water tank 416 is transported to the second water tank 417 by the second water pump 910, and the low-temperature water in the second water tank 417 returns to the first water tank 416.

[0061] ④ Hot water circulation between the second water tank 417 and the upper finned heat exchanger 42 of the oven:

[0062] The high-temperature water in the second water tank 417 is carried by the third water pump 110 to the upper finned heat exchanger 42 on both sides of the upper drying channel 21, generating the basic heat required for the hot air circulation in the upper drying channel 21. The infrared heating lamp also generates some auxiliary heat, thereby reaching the suitable temperature of the upper drying channel 21. After the high-temperature water releases heat, it becomes low-temperature water and flows back to the second water tank 417.

[0063] ⑤ Hot water circulation between the second water tank 417 and the lower finned heat exchanger 43 of the oven:

[0064] The high-temperature water in the second water tank 417 is carried by the fourth water pump 210 to the lower finned heat exchangers 43 on both sides of the lower drying channel 22, generating the basic heat required for hot air circulation in the lower drying channel 22. The infrared heating lamps also generate some auxiliary heat, thereby reaching the suitable temperature of the lower drying channel 22. After the high-temperature water releases heat, it becomes low-temperature water and flows back to the second water tank 417.

[0065] ⑥ Hot water circulation between the second water tank 417 and the finned heat exchanger 44 in the adhesive application area:

[0066] The high-temperature water in the second water tank 417 is carried by the fifth water pump 310 to the lower material conveying mechanism 32 of the primary glue application station 12 and the secondary glue application station 13 for heating, so as to reach the suitable temperature of the lower material conveying mechanism 32 of the primary glue application station 12 and the secondary glue application station 13. After the high-temperature water releases heat, it becomes low-temperature water and returns to the second water tank 417.

[0067] ⑦ Hot water circulation between the second water tank 417 and the bottom-mounted finned heat exchanger 45:

[0068] The high-temperature water from the second water tank 417 is carried by the sixth water pump 410 to the finned heat exchangers 45 of the first insulation cover 30, the second insulation cover 40 and the third insulation cover 50 of the bottom-applying station 14 for heating. At the same time, an electric heating tube is installed in the bottom-applying station 14 for auxiliary heating, thereby achieving the appropriate temperature in the areas of the first insulation cover 30, the second insulation cover 40 and the third insulation cover 50 of the bottom-applying station 14. After the high-temperature water releases heat, it becomes low-temperature water and returns to the second water tank 417.

[0069] The above does not limit the technical scope of the present invention in any way. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the technical scope of the present invention.

Claims

1. A shoe drying device using air energy and infrared heating, characterized in that, include: A frame, which extends along a straight line; Multiple drying ovens are installed at intervals on a frame, and each drying oven is provided with an upper drying channel and a lower drying channel with openings at both ends. Multiple ventilation holes are evenly distributed on the side walls of the upper and lower drying channels, and multiple circulating fans are installed at intervals on the outer surface of the side walls of the upper and lower drying channels. A left ventilation chamber and a right ventilation chamber are provided above the upper and lower drying channels, and the left and right ventilation chambers are respectively corresponding to the circulating fans on the side walls. Multiple ventilation holes are also evenly distributed on the bottom of the left and right ventilation chambers and on the side walls above the circulating fans. A material conveying device, comprising an upper material conveying mechanism and a lower material conveying mechanism; An air source heat pump heating system includes an air source heat pump unit, multiple upper-layer finned heat exchangers for ovens, and multiple lower-layer finned heat exchangers for ovens. The air source heat pump unit is installed on the top of one of the ovens. The upper-layer finned heat exchangers are installed on the inner surfaces of the side walls of the upper drying channel, and the lower-layer finned heat exchangers are installed on the inner surfaces of the side walls of the lower drying channel. Both the upper-layer and lower-layer finned heat exchangers are connected to the air source heat pump unit via pipes. The air source heat pump unit provides a high-temperature medium to the upper-layer and lower-layer finned heat exchangers for ovens. An infrared heating system, comprising multiple sets of infrared radiators, each set of infrared radiators being installed on the inner top wall of the upper drying channel and the lower drying channel respectively.

2. The shoe drying equipment using air energy and infrared heating according to claim 1, characterized in that: The air source heat pump unit includes a main unit housing and a compressor, a shell-and-tube heat exchanger, an expansion valve, an evaporator, a first water tank, and a second water tank installed inside the main unit housing. The shell-and-tube heat exchanger includes an inner tube and an outer tube coaxially fitted together. The compressor, the inner tube of the shell-and-tube heat exchanger, the expansion valve, and the evaporator are connected end-to-end via pipes to form a closed refrigerant circulation loop. The first water tank is connected end-to-end via pipes to the annular gap between the inner and outer tubes of the shell-and-tube heat exchanger to form a closed first water circulation loop. A first water pump is connected to the pipe between the outlet of the first water tank and the inlet of the annular gap of the shell-and-tube heat exchanger. The first water tank is connected end-to-end to the second water tank via pipes to form a closed second water circulation loop. A second water pump is connected to the pipe between the outlet of the first water tank and the inlet of the second water tank. The upper finned heat exchanger of the oven is installed on the inner surface of the two side walls of the upper drying channel, and the lower finned heat exchanger of the oven is installed on the inner surface of the two side walls of the lower drying channel. The upper finned heat exchanger of the oven is connected to the second water tank end to end through a pipe to form a closed third water circulation loop. A third water pump is connected to the pipe between the outlet of the second water tank and the inlet of the upper finned heat exchanger of the oven. The lower finned heat exchanger of the oven is connected to the second water tank end to end through a pipe to form a closed fourth water circulation loop. A fourth water pump is connected to the pipe between the outlet of the second water tank and the inlet of the lower finned heat exchanger of the oven.

3. The shoe drying equipment using air energy and infrared heating according to claim 2, characterized in that: The main unit housing is divided into a first chamber and a second chamber. The compressor, shell-and-tube heat exchanger, expansion valve, evaporator, first water tank and second water tank are installed in the first chamber. The evaporator is installed in the second chamber and is a finned heat exchanger. Multiple ventilation holes are evenly distributed on both sides of the second chamber. A dual-inlet centrifugal fan corresponding to the evaporator is installed in the second chamber. The air outlet of the dual-inlet centrifugal fan is set upward. The main unit air outlet duct connected to the air outlet of the dual-inlet centrifugal fan is installed on the top of the second chamber.

4. The shoe drying equipment using air energy and infrared heating according to claim 2, characterized in that: The air source heat pump unit also includes a filter, a sight glass, a solenoid valve, and a gas-liquid separator. The filter, sight glass, and solenoid valve are connected in sequence between the shell-and-tube heat exchanger and the expansion valve, and the gas-liquid separator is connected between the evaporator and the compressor.

5. The shoe drying equipment using air energy and infrared heating according to claim 3, characterized in that: The frame is provided with a chemical treatment station, a primary adhesive application station, a secondary adhesive application station, and a bottom-applying station along its length. There are three ovens, located between the chemical treatment station and the primary adhesive application station, between the primary adhesive application station and the secondary adhesive application station, and between the secondary adhesive application station and the bottom-applying station, respectively. A cold air device is provided above each oven, comprising cold air ducts and multiple air curtains. The cold air ducts are located above the ovens and include a left cold air duct and a right cold air duct that are parallel to each other and arranged along the length of the frame. The left and right cold air ducts are connected to both ends of the main unit's exhaust duct, and multiple cold air outlets are provided on the left and right cold air ducts above the chemical treatment station, the primary adhesive application station, the secondary adhesive application station, and the bottom-applying station, respectively. The air curtains are installed at the cold air outlets and include airflow adjustment boxes.

6. The shoe drying equipment using air energy and infrared heating according to claim 5, characterized in that: It also includes an exhaust system, which comprises an upper exhaust hood, an upper exhaust duct, an exhaust box, a lower exhaust box, a lower exhaust duct, and a filter box. The upper exhaust hood is mounted on the frame and located above the chemical treatment station, the primary adhesive application station, and the secondary adhesive application station. The exhaust box is mounted on the top of the oven and contains a blower with its outlet facing upwards. A blower silencer connected to the blower outlet is mounted on the top of the exhaust box. One end of the upper exhaust duct is connected to the upper exhaust hood, and the other end is connected to the exhaust box. The lower exhaust box is mounted on the frame and located on both sides of the chemical treatment station, the primary adhesive application station, and the secondary adhesive application station, and has exhaust vents. The filter box is installed inside the exhaust box and is a rectangular box composed of multiple activated carbon mesh panels. One end of the lower exhaust duct is connected to the lower exhaust box, and the other end is connected to the filter box.

7. The shoe drying equipment using air energy and infrared heating according to claim 5, characterized in that: The air-source heating system also includes two finned heat exchangers for the glue application area. The two finned heat exchangers for the glue application area are respectively installed on the frame and located below the material conveying mechanism of the primary glue application station and the secondary glue application station. The finned heat exchangers for the glue application area are connected to the second water tank end to end through pipes to form a closed fifth water circulation loop. A fifth water pump is connected to the pipe between the outlet of the second water tank and the inlet of the finned heat exchanger for the glue application area.

8. The shoe drying equipment using air energy and infrared heating according to claim 2, characterized in that: The material conveying device further includes a top-level material conveying mechanism, which is installed on the frame and located above the upper-level material conveying mechanism. A first insulation cover is installed at the bottom of the upper-level material conveying mechanism, a second insulation cover is installed at the bottom of the top-level material conveying mechanism, and a third insulation cover is installed on the frame above the top-level material conveying mechanism. The air-source heating system further includes three bottom-mounted finned heat exchangers, which are respectively installed inside the first, second, and third insulation covers. Each bottom-mounted finned heat exchanger is connected to the second water tank end-to-end via a pipe to form a closed sixth water circulation loop. A sixth water pump is connected to the pipe between the outlet of the second water tank and the inlet of the bottom-mounted finned heat exchanger.

9. The shoe drying equipment using air energy and infrared heating according to claim 1, characterized in that: Each group of infrared radiators includes multiple infrared heating lamps arranged side by side.

10. The shoe drying equipment using air energy and infrared heating according to claim 1, characterized in that: The oven is equipped with an insulated outer shell; both ends of the upper and lower drying channels are equipped with curtains.

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