A continuous infrared dryer for fruits and vegetables

Abstract

The present invention discloses a continuous infrared dryer for fruits and vegetables, comprising a fixed base, a barrel rotatably mounted on the fixed base, the barrel being driven by a rotary power device, a sliding bracket slidably mounted on the fixed base, a light box assembly being fixed on the sliding bracket, the light box assembly comprising a box body, an air chamber being provided on the box body, an air inlet pipe being fixed at one end of the box body, an air supply blower being mounted on the sliding bracket, an air distribution pipe being fixed in the air chamber, the air distribution pipe being provided with air distribution holes, an air distribution plate being mounted below the air distribution pipe on the box body, the air distribution plate being provided with a plurality of distribution holes, an air cooling chamber surrounded by a heat-insulating flow-distributing plate being mounted below the air distribution plate, air outlet holes being evenly arranged on the heat-insulating flow-distributing plate, and a plurality of infrared heating lamps being mounted on the box body. In this continuous infrared dryer for fruits and vegetables, the infrared heating lamps of the infrared dryer have a more uniform heat dissipation effect, and the light box assembly can be easily inspected and repaired, thereby ensuring long-term and stable drying operation.

Description

Technical Field

[0001] The invention relates to an infrared dryer, in particular to a continuous infrared dryer for fruits and vegetables. Background Art

[0002] The current infrared dryer mainly includes a fixed base and a sliding base. A light box assembly is installed on the fixed base, and a barrel is installed on the sliding base. The light box assembly is inserted into the barrel to perform infrared heating on the inside of the barrel. The barrel is driven to rotate by a motor, and a feeding device is provided at one end of the barrel and a discharge port is provided at the other end of the barrel. Spiral blades are provided in the barrel. In the current infrared dryer, the light box is fixed on the frame and cannot be moved, while the barrel moves through the mobile frame. Although the infrared dryer can achieve continuous drying of fruits and vegetables, it still has the following disadvantages: 1. The current When the infrared dryer requires maintenance, especially lamp replacement, the barrel must be removed using a mobile rack to expose the lamp from within the barrel. The heavy barrel makes this movement difficult. Currently, the lamp housing requires air cooling, but the current lamp housing assembly structure is not rational. The air flow from the chamber inside the lamp housing is uneven, resulting in uneven cooling of the lamp, which reduces its service life. This uneven cooling can also easily cause the lamp to overheat, triggering a temperature protection circuit breaker and causing the lamp to stop working. This reduces the drying efficiency of the infrared dryer. 3. Because the dryer is continuous, the barrel rotates for a long time. The support ring on the outside of the barrel heats up during this long rotation, causing deformation and ultimately affecting the smooth rotation of the barrel. 4. The barrel is currently driven by a motor and connecting rod transmission mechanism. When the motor power is transmitted to the other support roller through the connecting rod, there is a certain amount of transmission loss, resulting in inconsistent rotation speeds of the upstream and downstream support rollers, resulting in significant power loss. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a continuous infrared dryer for fruits and vegetables, wherein the heat dissipation effect of the infrared heating lamp of the infrared dryer is more uniform and the lamp box assembly is convenient for maintenance, thereby ensuring long-term and stable drying work.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a continuous infrared drying machine for fruits and vegetables, comprising a fixed machine base, a barrel is rotatably mounted on the fixed machine base, a feed port is provided at the upstream end of the barrel, a feeding device is installed on the fixed machine base, a discharge port is provided at the downstream end of the barrel, a spiral stirring blade is provided in the barrel, the barrel is driven by a rotating power device, a discharge hopper connected to the discharge port is provided on the fixed machine base, a sliding bracket is slidably mounted on the fixed machine base, a light box fixing base is fixed on the sliding bracket, a light box assembly is detachably fixed on the light box fixing base, the light box assembly is inserted into the barrel, an exhaust pipe for sucking the barrel is installed on the fixed machine base, and the exhaust pipe is connected to the exhaust system The light box assembly includes a rectangular box body, the lower end of the box body is open and inclined, an air chamber is provided on the box body, an air inlet pipe connected to the air chamber is fixed at one end of the box body, an air supply fan is installed on the sliding bracket, the positive pressure air outlet of the air supply fan is connected to the air inlet pipe, an air distribution pipe connected to the air inlet pipe is fixed in the air chamber, and air distribution holes connected to the air chamber are provided on the air distribution pipe, an air equalizing plate is installed on the box body below the air distribution pipe, a plurality of distribution holes are provided on the air equalizing plate, an air cooling chamber surrounded by an insulating flow equalizing plate is installed below the air equalizing plate, and air outlet holes are evenly provided on the insulating flow equalizing plate, a plurality of infrared heating lamps are installed on the box body, and the infrared heating lamps are located in the air cooling chamber.

[0005] As a preferred solution, the cross-section of the air distribution pipe is polygonal, and the two ends of the air distribution pipe are respectively fixed to the wall of the air chamber. The air distribution holes are provided at the upper end of the air distribution pipe, and the lower end of the air distribution pipe is flat and fixed to the air distribution plate. A baffle is provided downstream of each air distribution hole in the air distribution pipe, and the area of ​​the baffle is smaller than the cross-sectional area of ​​the air distribution pipe. Therefore, the air distribution holes are provided at the upper end, and the air flow first flows upward and then flows downward, so that the air flow is more uniform. At the same time, the polygonal air distribution pipe is more convenient for fixed connection with the air distribution plate. The baffle can effectively block the gas entering the air distribution pipe, allowing it to flow out of the air distribution holes more smoothly.

[0006] As a preferred solution, the air balancing plate includes a connecting plate body and air balancing plates arranged on both sides of the connecting plate body. The edges of the air balancing plate body are provided with connecting folds. The air balancing plate body is provided with a plurality of distribution holes along the length direction. The aperture of the distribution hole close to the air inlet pipe side is larger than the aperture of the distribution hole away from the air inlet pipe side. The connecting plate body on the air balancing plate is convenient for fixing to the air distribution pipe, and the different apertures of the distribution holes can effectively distribute the air pressure, thereby balancing the wind pressure differences at different positions caused by the single-sided air inlet. In this way, the air volume and wind speed discharged from the air outlet are more uniform.

[0007] As a preferred solution, the heat-insulating flow-equalizing plate is a sintered ceramic orifice plate. The sintered ceramic orifice plate constituting the air-cooling chamber includes a horizontal sintered ceramic orifice plate and a vertical sintered ceramic orifice plate located on both sides of the horizontal sintered ceramic orifice plate. Horizontal upper slide grooves are provided on the left and right sides of the horizontal sintered ceramic orifice plate, and a horizontal lower slide groove is provided below the vertical sintered ceramic orifice plate. A transition connection seat is fixed below the air-equalizing plate, and two horizontal upper mounting rails and two horizontal lower mounting rails are provided on the transition connection seat. The horizontal upper slide grooves of the horizontal sintered ceramic orifice plate are provided on the left and right sides of the horizontal sintered ceramic orifice plate. The groove is installed on the horizontal upper mounting rail, and the horizontal lower sliding groove below the vertical sintered ceramic orifice plate is installed on the horizontal lower mounting rail. The transition connecting seat includes a horizontal connecting seat fixed in the box body, and the two ends of the horizontal connecting seat are fixed with the lamp holder of the infrared heating lamp tube. The side connecting seats are removably fixed on both sides of the horizontal connecting seat. The horizontal upper mounting rail is arranged on both sides of the horizontal connecting seat, and each side connecting seat is provided with the horizontal lower mounting rail. The installation of the sintered ceramic orifice plate is more convenient, and the air-cooled chamber can be better enclosed.

[0008] As a preferred solution, a pair of upstream support rollers and a pair of downstream support rollers are provided on the fixed machine base, and an upstream support ring and a downstream support ring are fixed to the outer periphery of the barrel, and the upstream support ring and the downstream support ring are supported by the upstream support roller and the downstream support roller respectively, and the upstream support ring and the downstream support ring are both provided with a heat dissipation structure, and the rotating power device is transmission-connected to one of the upstream support rollers and / or one of the downstream support rollers. The above-mentioned heat dissipation structure can be used to better dissipate heat for the upstream support ring and the downstream support ring, thereby reducing deformation of the upstream support ring and the downstream support ring, thereby ensuring long-term and stable rotation of the barrel.

[0009] As a preferred solution, the upstream support ring and the downstream support ring have the same structure. The upstream support ring includes a connecting ring plate, one side of which is fixed with a concentrically arranged outer support tube and inner mounting tube. The connecting ring plate is provided with a plurality of hollow holes, which are located between the outer support tube and the inner mounting tube to form the heat dissipation structure. The outer support tube of the upstream support ring can be supported by a support roller, while the inner mounting tube can be welded to the barrel. The hollow holes between the two facilitate the rapid passage of gas. During the rotation of the barrel, gas will quickly pass through the hollow holes to cool the outer support tube, reducing deformation of the upstream and downstream support rings and ensuring that they can meet the requirements of long-term operation.

[0010] As a preferred solution, the inner mounting barrel comprises a barrel body, one end of which is provided with a positioning step that snaps into the annular hole of the connecting ring plate. A connecting plate is welded to the exterior of the barrel body, removably fastened to the connecting ring plate by bolts. A first support ring is welded to the outer end of the connecting plate. During assembly, the inner mounting barrel and the connecting ring plate can be separated first, which facilitates welding between the inner mounting barrel and the barrel, and then the two can be assembled, making assembly simpler.

[0011] As a preferred solution, the barrel includes a metal barrel body, the barrel body is inserted into the inner hole of the inner mounting barrel and welded to each other, the outside of the barrel body is wrapped with a heat insulation layer, the outside of the heat insulation layer is wrapped with three sections of metal skin, wherein the middle section of the metal skin is supported by the first support ring body of the upstream support ring and the downstream support ring, the other side of the connecting ring plate is welded with a second support ring body, the two ends of the barrel body are welded with a sealing plate, one side of the sealing plate is welded with a third support ring body, and the metal skin in the upstream section and the downstream section are supported by the second support ring body and the third support ring body respectively. Therefore, the barrel structure is reasonable, the barrel body can be well welded to the inner mounting barrel, and the heat insulation layer well wraps the barrel body, and the outside is wrapped with metal skin, the overall outside is neater, and the metal skin is arranged in sections for easy welding and assembly.

[0012] As a preferred solution, the rotary power unit includes two servo motors, which are controlled by a synchronous controller for synchronous operation. The two servo motors are respectively connected to one of the upstream support roller and the downstream support roller. This rotary power unit utilizes two servo motors to drive the upstream support roller and the downstream support roller, respectively, and is controlled by a synchronous controller for synchronous operation. This ensures that the barrel portions of the upstream and downstream support rollers rotate as much as possible, reduces transmission errors, and ensures the stability of barrel rotation.

[0013] As a preferred solution, an upstream limiting structure and a downstream limiting structure are respectively provided on the upstream side and the downstream side of the barrel on the fixed machine base. The upstream limiting structure and the downstream limiting structure are the same. The upstream limiting structure includes an upstream support, and an upstream limiting wheel is rotatably installed on the upstream support around a vertical axis. The upstream limiting wheel is in contact with the upstream end face of the barrel. The downstream limiting structure includes a downstream support, and a downstream limiting wheel is rotatably installed on the downstream support around a vertical axis. The downstream limiting wheel is in contact with the downstream end face of the barrel.

[0014] After adopting the above technical scheme, the effects of the present invention are as follows: 1. The barrel is rotatably mounted on the fixed machine base; and the sliding bracket is slidably mounted on the fixed machine base, and the light box fixing base is fixed on the sliding bracket, and the light box assembly is detachably fixed on the light box fixing base. Therefore, during maintenance, it is only necessary to move the sliding bracket to remove the light box assembly from the barrel, which is more labor-saving and convenient to operate; 2. Since the light box assembly includes a rectangular box body, the lower end of the box body is open and inclined, and an air chamber is provided on the box body, an air inlet pipe connected to the air chamber is fixed at one end of the box body, an air supply fan is installed on the sliding bracket, and the positive pressure outlet of the air supply fan is connected to the air inlet pipe, and an air distribution pipe connected to the air inlet pipe is fixed in the air chamber, and an air distribution hole connected to the air chamber is provided on the air distribution pipe, and the upper part of the box body is provided with An air equalizing plate is installed below the air distribution pipe, and several distribution holes are provided on the air equalizing plate. An air-cooling chamber surrounded by an insulating flow equalizing plate is installed below the air equalizing plate, and air outlet holes are evenly provided on the insulating flow equalizing plate. Several infrared heating lamps are installed on the box body, and the infrared heating lamps are in the air-cooling chamber. The gas from the air intake pipe first enters the box body through the air distribution holes on the air distribution pipe, thereby distributing the air intake position for the first time. Then the gas enters the air chamber and then passes downward through the air equalizing plate. The distribution holes on the air equalizing plate distribute the airflow for the second time, which can make the internal air pressure more uniform and minimize the influence of uneven pressure caused by air intake at one end. Then the airflow passes through the air outlet holes on the insulating flow equalizing plate again and is evenly blown out of the air-cooling chamber to cool the infrared heating lamps. The gas flow through the above structure is more uniform and the overall cooling effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and examples.

[0016] Figure 1 is a side structural diagram of an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 Right view of;

[0018] Figure 3 This is a schematic diagram of the installation structure of the light box assembly;

[0019] Figure 4 It is a schematic diagram of the installation structure of the barrel;

[0020] Figure 5 yes Figure 4 An enlarged cross-sectional view at point A;

[0021] Figure 6 yes Figure 4 An enlarged cross-sectional view at point B;

[0022] Figure 7 is a partial cross-sectional view of the downstream support ring;

[0023] Figure 8 is a schematic diagram of the end face of the light box assembly;

[0024] Figure 9 It is a cross-sectional view of the structure of the infrared heating lamp and the air-cooling chamber;

[0025] Figure 10 It is a top view of the wind plate;

[0026] Figure 11 This is a schematic diagram of the end face of the gas distribution pipe;

[0027] Figure 12 yes Figure 11 A top view of

[0028] In the accompanying drawings: 1. Fixed base; 2. Sliding bracket; 3. Barrel; 31. Barrel body; 32. Insulation layer; 33. Metal cover of middle section; 34. Metal cover of downstream section; 35. Closing plate; 36. Third support ring support; 37. Spiral stirring blade; 4. Light box assembly; 41. Air inlet pipe; 42. Box body; 43. Air distribution pipe; 431. Air distribution hole; 432. Baffle; 44. Infrared heating lamp; 45. Lamp holder; 46. Air chamber; 47. Air cooling chamber; 48. Air distribution plate; 481. Connecting plate; 482. Air distribution plate; 483. Distribution hole; 49. Transition connector; 491. Horizontal connector; 492. Side connector; 493. Horizontal upper mounting rail; 494. Horizontal lower mounting rail; 495. Intermediate horizontal guide rail; 410. Horizontal sintered ceramic orifice plate; 4101. Horizontal upper slide; 4102. Intermediate horizontal slide; 411. Vertical sintered ceramic orifice plate; 4111. Horizontal lower slide; 5. Feeding device; 6. Exhaust fan; 7. Air supply fan; 8. Exhaust pipe; 9. Discharge hopper; 10. Downstream support roller; 11. Upstream support roller; 12. Servo motor; 13. Upstream support ring; 14. Downstream support ring; 15. Light box fixing seat; 16. Clamp; 17. Downstream limiting wheel; 18. Upstream limiting wheel; 141. Connecting ring plate; 142. Outer support cylinder; 143. Cylinder body; 144. Connecting plate; 145. First support ring body; 146. Second support ring body; 147. Hollow hole. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below through specific examples.

[0030] like Figures 1 to 12As shown, a continuous infrared dryer for fruits and vegetables includes a fixed base 1, on which a barrel 3 is rotatably mounted, a feed port being provided at the upstream end of the barrel 3, and a feeding device 5 being installed on the fixed base 1. The feeding device 5 includes a feed hopper and a screw feeder, which is convenient for feeding fruits and vegetables. Of course, the feeding device 5 can also be automatically fed in the form of a chute, and a discharge port is provided at the downstream end of the barrel 3. A discharge hopper 9 connected to the discharge port is provided on the fixed base 1, a spiral stirring blade 37 is provided in the barrel 3, and the barrel 3 is driven by a rotary power device.

[0031] In this embodiment, Figure 1 、 2 As shown in Figures 4, 5, 6 and 7, a pair of upstream support rollers 11 and a pair of downstream support rollers 10 are provided on the fixed machine base 1, and an upstream support ring 13 and a downstream support ring 14 are fixed to the outer periphery of the barrel 3, and the upstream support ring 13 and the downstream support ring 14 are supported by the upstream support roller 11 and the downstream support roller 10 respectively, and a heat dissipation structure is provided on the upstream support ring 13 and the downstream support ring 14, and the rotating power device is transmission-connected with one of the upstream support rollers 11 and / or one of the downstream support rollers 10. The above-mentioned heat dissipation structure can be used to better dissipate heat for the upstream support ring 13 and the downstream support ring 14, thereby reducing deformation of the upstream support ring 13 and the downstream support ring 14, thereby ensuring long-term and stable rotation of the barrel 3.

[0032] In this embodiment, the upstream support ring 13 and the downstream support ring 14 have the same structure. The upstream support ring 13 includes a connecting ring plate 141, to one side of which is fixed a concentric outer support tube 142 and an inner mounting tube. The connecting ring plate 141 is provided with a plurality of hollow holes 147, which are located between the outer support tube 142 and the inner mounting tube, forming the heat dissipation structure. The inner mounting tube includes a barrel 143, one end of which is provided with a positioning step that snaps into the annular hole of the connecting ring plate 141. A connecting plate 144 is welded to the outside of the barrel 143. The connecting plate 144 is removably fixed to the connecting ring plate 141 by bolts. A first support ring body 145 is welded to the outer end of the connecting plate 144. During assembly, the inner mounting tube and the connecting ring plate 141 can be separated first, which facilitates welding between the inner mounting tube and the barrel 3, and then the two can be assembled, making assembly simpler.

[0033] The barrel 3 includes a metal barrel body 31, which is inserted into the inner hole of the inner mounting barrel and welded to each other. The outer part of the barrel body 31 is wrapped with a heat insulation layer 32, and the outer part of the heat insulation layer 32 is wrapped with three sections of metal skin, wherein the middle section of the metal skin 33 is supported by the first support ring body 145 of the upstream support ring 13 and the downstream support ring 14, and the second support ring body 146 is welded to the other side of the connecting ring plate 141. The two ends of the barrel body 31 are welded with a sealing plate 35, and one side of the sealing plate 35 is welded with a third support ring body. The metal skin 34 in the upstream section and the downstream section are supported by the second support ring body 146 and the third support ring body 36 respectively. Therefore, the structure of the barrel 3 is reasonable. The barrel body 31 can be well welded to the inner mounting barrel, and the heat insulation layer 32 well wraps the barrel body 31 and wraps the outer part with metal skin, making the overall outer part neater. The metal skin is arranged in sections for easy welding and assembly.

[0034] The rotary power device includes two servo motors 12, which are controlled by a synchronous controller to operate synchronously. The two servo motors 12 are respectively connected to one of the upstream support rollers 11 and the downstream support roller 10. The rotary power device uses two servo motors 12 to drive the upstream support roller 11 and the downstream support roller 10 respectively, and uses a synchronous controller to control the synchronous operation. This ensures the rotation of the barrel portion of the upstream support roller 11 and the downstream support roller 10 as much as possible, reduces transmission errors, and ensures the stability of the rotation of the barrel 3.

[0035] The fixed machine base 1 is provided with an upstream limiting structure and a downstream limiting structure on the upstream side and the downstream side of the barrel 3 respectively. The upstream limiting structure and the downstream limiting structure are the same. The upstream limiting structure includes an upstream support, and an upstream limiting wheel 18 is installed on the upstream support for rotation around the vertical axis. The upstream limiting wheel 18 is in contact with the upstream end face of the barrel 3. The downstream limiting structure includes a downstream support, and a downstream limiting wheel 17 is installed on the downstream support for rotation around the vertical axis. The downstream limiting wheel 17 is in contact with the downstream end face of the barrel 3. Due to the adoption of the upstream limiting structure and the downstream limiting structure, the axial position of the barrel 3 can be well limited, and then there is no need to set an axial limiting structure on the outer support cylinder 142, so that the upstream support ring 13 and the downstream support ring 14 can better dissipate heat.

[0036] For example Figure 1 、 2 , 3, 8, 9, 10, 11 and Figure 12As shown, a sliding bracket 2 is slidably installed on the fixed machine base 1, and the sliding bracket 2 is also a frame structure. A light box fixing base 15 is fixed on the sliding bracket 2, and a light box assembly 4 is detachably fixed on the light box fixing base 15. The light box assembly 4 is inserted into the barrel 3, and an exhaust pipe 8 for sucking the inside of the barrel 3 is installed on the fixed machine base 1. The exhaust pipe 8 is connected to the exhaust system, and the exhaust system includes an exhaust fan 6, which is fixed on the fixed machine base 1.

[0037] In this embodiment, the light box assembly 4 includes a rectangular box body 42, the lower end of the box body 42 is open and tilted, an air chamber 46 is provided on the box body 42, one end of the box body 42 is fixed with an air inlet pipe 41 connected to the air chamber 46, and the air inlet pipe 41 of the light box assembly 4 is fixed to the light box fixing seat 15 through a clamp 16, an air supply fan 7 is installed on the sliding bracket 2, the positive pressure air outlet of the air supply fan 7 is connected to the air inlet pipe 41, and the air chamber 46 is fixed with an air inlet pipe 41. The connected air distribution pipe 43 is provided with air distribution holes 431 connected to the air chamber 46. An air distribution plate 48 is installed on the box body 42 below the air distribution pipe 43. The air distribution plate 48 is provided with a plurality of distribution holes 483. An air cooling chamber 47 surrounded by an insulating flow equalizing plate is installed below the air distribution plate 48. The insulating flow equalizing plate is evenly provided with air outlet holes. A plurality of infrared heating lamps 44 are installed on the box body 42. The infrared heating lamps 44 are located in the air cooling chamber 47.

[0038] The cross-section of the air distribution pipe 43 is polygonal, preferably a regular hexagon. The two ends of the air distribution pipe 43 are respectively fixed to the walls of the air chamber 46. The air distribution holes 431 are provided at the upper end of the air distribution pipe 43. The lower end of the air distribution pipe 43 is flat and fixed to the air distribution plate 48. A baffle 432 is provided downstream of each air distribution hole 431 in the air distribution pipe 43. The area of ​​the baffle 432 is smaller than the cross-sectional area of ​​the air distribution pipe 43. Therefore, the air distribution holes 431 are provided at the upper end, and the air flow first flows upward and then flows downward, so that the air flow is more uniform. At the same time, the polygonal air distribution pipe 43 is more convenient for fixed connection with the air distribution plate 48. The baffle 432 can effectively block the gas entering the air distribution pipe 43, allowing it to flow out of the air distribution holes 431 more smoothly.

[0039] The air balancing plate 48 includes a connecting plate 481 and air balancing plates 482 disposed on either side of the connecting plate 481. The air balancing plates 482 form an obtuse angle with the connecting plate 481, and the edges of the air balancing plates are provided with connecting hems. Several distribution holes 483 are provided along the length of the air balancing plate 482. The distribution holes 483 closer to the air inlet pipe 41 have larger diameters than those farther from the air inlet pipe 41. The connecting plate 481 on the air balancing plate 48 facilitates fastening to the air distribution pipe 43, while the varying diameters of the distribution holes 483 effectively distribute air pressure, thereby balancing the pressure differences at different locations caused by unilateral air inflow. This results in a more uniform air volume and velocity at the outlets.

[0040] The heat-insulating flow-equalizing plate is a sintered ceramic orifice plate. The sintered ceramic orifice plate constituting the air-cooling chamber 47 includes a horizontal sintered ceramic orifice plate 410 and a vertical sintered ceramic orifice plate 411 located on both sides of the horizontal sintered ceramic orifice plate 410. Horizontal upper slide grooves 4101 are provided on the left and right sides of the horizontal sintered ceramic orifice plate 410, and a horizontal lower slide groove 4111 is provided below the vertical sintered ceramic orifice plate 411. A transition connecting seat 49 is fixed below the air-equalizing plate 48, and two horizontal upper mounting rails 493 and two horizontal lower mounting rails 494 are provided on the transition connecting seat 49. The horizontal upper slide groove 4101 of the horizontal sintered ceramic orifice plate 410 is installed on the water On the flat upper mounting rail 493, the horizontal lower sliding groove 4111 below the vertical sintered ceramic orifice plate 411 is installed on the horizontal lower mounting rail 494, and the transition connecting seat 49 includes a horizontal connecting seat 491 fixed in the box body 42, and the two ends of the horizontal connecting seat 491 are fixed with the lamp holder 45 of the infrared heating lamp tube 44, and the side connecting seats 492 are removably fixed on both sides of the horizontal connecting seat 491. The horizontal upper mounting rail 493 is arranged on both sides of the horizontal connecting seat 491, and each side connecting seat 492 is provided with the horizontal lower mounting rail 494. The installation of the sintered ceramic orifice plate is more convenient, and the air-cooled chamber 47 can be better surrounded.

[0041] In order to better fix the horizontal sintered ceramic orifice plate 410 , a middle horizontal guide rail 495 is further provided on the horizontal connecting seat 491 , and a middle horizontal slide groove 4102 adapted to the middle horizontal guide rail 495 is provided on the horizontal sintered ceramic orifice plate 410 .

[0042] The infrared dryer in this embodiment can not only meet the needs of continuous drying of fruits and vegetables, but can also be used for infrared drying of grains or plastic particles.

[0043] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A continuous infrared dryer for fruits and vegetables, comprising a fixed base, a barrel rotatably mounted on the fixed base, a feed port provided at the upstream end of the barrel, a feeding device mounted on the fixed base, a discharge port provided at the downstream end of the barrel, a spiral stirring blade provided within the barrel, the barrel being driven by a rotary power device, and a discharge hopper connected to the discharge port provided on the fixed base, characterized in that: The exhaust pipe is connected with the exhaust gas fan of the air duct, and the exhaust gas fan of the air duct is connected with the exhaust gas fan of the air duct. A wind-cooled chamber surrounded by a heat-insulating flow-equalizing plate is installed below, and air outlet holes are evenly arranged on the heat-insulating flow-equalizing plate. Several infrared heating lamps are installed on the box body, and the infrared heating lamps are located in the wind-cooled chamber; the cross-section of the air distribution pipe is polygonal, and the two ends of the air distribution pipe are respectively fixed on the wall of the air chamber, and the upper end of the air distribution pipe is provided with the air distribution holes, and the lower end of the air distribution pipe is flat and fixed to the air equalizing plate, and a baffle is provided in the air distribution pipe downstream of each air distribution hole, and the area of ​​the baffle is smaller than the cross-sectional area of ​​the air distribution pipe; the air equalizing plate includes a connecting plate body and an air equalizing plate body arranged on both sides of the connecting plate body, and the edge of the air equalizing plate body is provided with a connecting folded edge, and a plurality of distribution holes are provided on the air equalizing plate body along the length direction, and the aperture of the distribution hole close to the air inlet pipe side is larger than the aperture of the distribution hole away from the air inlet pipe side.

2. A continuous infrared drying machine for fruits and vegetables according to claim 1, characterized in that: The heat insulation and flow equalizing plate is a sintered ceramic orifice plate. The sintered ceramic orifice plate constituting the air-cooling chamber includes a horizontal sintered ceramic orifice plate and a vertical sintered ceramic orifice plate located on both sides of the horizontal sintered ceramic orifice plate. Horizontal upper slide grooves are provided on the left and right sides of the horizontal sintered ceramic orifice plate, and a horizontal lower slide groove is provided below the vertical sintered ceramic orifice plate. A transition connecting seat is fixed below the air equalizing plate, and two horizontal upper mounting rails and two horizontal lower mounting rails are provided on the transition connecting seat. The upper horizontal slide groove of the horizontal sintered ceramic orifice plate is installed on the upper horizontal mounting rail, and the horizontal lower slide groove below the vertical sintered ceramic orifice plate is installed on the lower horizontal mounting rail. The transition connecting seat includes a horizontal connecting seat fixed in the box body, and the lamp holders of the infrared heating lamp tubes are fixed at both ends of the horizontal connecting seat. Side connecting seats are detachably fixed on both sides of the horizontal connecting seat. The upper horizontal mounting rails are provided on both sides of the horizontal connecting seat, and each side connecting seat is provided with the lower horizontal mounting rail.

3. A continuous infrared drying machine for fruits and vegetables according to claim 2, characterized in that: A pair of upstream support rollers and a pair of downstream support rollers are provided on the fixed machine base, and an upstream support ring and a downstream support ring are fixed to the outer periphery of the barrel. The upstream support ring and the downstream support ring are supported by the upstream support roller and the downstream support roller respectively, and the upstream support ring and the downstream support ring are both provided with a heat dissipation structure, and the rotating power device is transmission-connected to one of the upstream support rollers and / or one of the downstream support rollers.

4. A continuous infrared drying machine for fruits and vegetables as claimed in claim 3, characterized in that: The upstream support ring and the downstream support ring have the same structure. The upstream support ring includes a connecting ring plate, and a concentrically arranged outer support tube and an inner mounting tube are fixed on one side of the connecting ring plate. A plurality of hollow holes are provided on the connecting ring plate. The hollow holes are located between the outer support tube and the inner mounting tube to form the heat dissipation structure.

5. A continuous infrared drying machine for fruits and vegetables according to claim 4, characterized in that: The inner mounting cylinder includes a cylinder body, one end of which is provided with a positioning step that is inserted into the ring hole of the connecting ring plate. A connecting plate is welded to the outside of the cylinder body. The connecting plate and the connecting ring plate are detachably fixed by bolts, and a first support ring body is welded to the outer end of the connecting plate.

6. A continuous infrared drying machine for fruits and vegetables according to claim 5, characterized in that: The barrel includes a metal barrel body, which is inserted into the inner hole of the inner mounting barrel and welded to each other. The outside of the barrel body is wrapped with a heat insulation layer, and the outside of the heat insulation layer is wrapped with three sections of metal skin, wherein the middle section of the metal skin is supported by the first support ring body of the upstream support ring and the downstream support ring, and the second support ring body is welded to the other side of the connecting ring plate. Sealing plates are welded to both ends of the barrel body, and a third support ring body is welded to one side of the sealing plate. The metal skin in the upstream section and the metal skin in the downstream section are supported by the second support ring body and the third support ring body respectively.

7. A continuous infrared drying machine for fruits and vegetables according to claim 6, characterized in that: The rotary power device includes two servo motors, which are controlled by a synchronous controller to run synchronously. The two servo motors are respectively connected to one of the upstream support roller and the downstream support roller through transmission.

8. The continuous infrared drying machine for fruits and vegetables according to claim 7, characterized in that: The fixed machine base is respectively provided with an upstream limiting structure and a downstream limiting structure on the upstream side and the downstream side of the barrel, and the upstream limiting structure and the downstream limiting structure are the same. The upstream limiting structure includes an upstream support, and an upstream limiting wheel is rotatably mounted on the upstream support around a vertical axis, and the upstream limiting wheel is in contact with and cooperates with the upstream end face of the barrel. The downstream limiting structure includes a downstream support, and a downstream limiting wheel is rotatably mounted on the downstream support around a vertical axis, and the downstream limiting wheel is in contact with and cooperates with the downstream end face of the barrel.

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