High-efficiency infrared tunnel furnace and infrared tunnel furnace temperature control method

Abstract

This invention relates to the field of heating equipment technology, and particularly to a high-efficiency infrared tunnel furnace and a method for controlling the temperature of the infrared tunnel furnace. The tunnel furnace has a continuous conveyor belt for transporting a plurality of materials through the heating area of ​​the tunnel furnace in a transverse process path direction. The tunnel furnace includes an upper and a lower infrared heating module divided along a horizontal centerline. The infrared heating module is configured to cover at least a portion of the conveyor belt corresponding to the heating area. At least one set of multi-faceted reflective modules, arranged and rotated to generate infrared reflection within the tunnel furnace, covers the bandwidth of the conveyor belt and is composed of several reflective prisms with different inclination angles. The tunnel furnace of this invention can perform targeted temperature adjustments within the furnace, and features uniform heating, high heating efficiency, and energy saving.

Description

Technical Field

[0001] This invention relates to the field of heating equipment technology, and in particular to a high-efficiency infrared tunnel furnace and a method for controlling the temperature of the infrared tunnel furnace. Background Technology

[0002] Infrared tunnel ovens utilize infrared radiation for heating. The infrared radiation is absorbed by the product through resonance, thus achieving the purpose of heating the product. This type of radiative heating is a relatively environmentally friendly heating method, capable of directional heating of the surface layer and a certain depth of the material using matched light wavelengths and selective penetration. Because heat conduction is faster than heat convection and transfer, infrared tunnel ovens can improve production efficiency. However, the disadvantages of infrared tunnel ovens include high energy consumption, sometimes requiring a long preheating process, large temperature tolerance, and low heating uniformity. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a high-efficiency infrared tunnel furnace and an infrared tunnel furnace temperature control method, which solves the problems of high energy consumption, low heating uniformity and large heating temperature difference in the prior art.

[0004] To achieve the above and related objectives, the present invention provides a high-efficiency infrared tunnel furnace having a continuous conveyor belt for conveying a plurality of materials through the heating zone of the tunnel furnace in a transverse process path direction. The tunnel furnace includes the following operational combination:

[0005] An infrared heating module is formed by dividing the horizontal center line into an upper and a lower section. The infrared heating module is configured to cover at least a portion of the transmission belt and the heating area.

[0006] At least one set of multi-faceted reflective modules, which are positioned and rotated to generate infrared reflections within the tunnel furnace, the multi-faceted reflective modules covering the bandwidth of the transmission belt, and the multi-faceted reflective modules being composed of several reflective prisms with different tilt angles.

[0007] Furthermore, the multi-faceted reflective module includes several spaced-apart multi-faceted reflective columns, and a portion of the infrared radiation radiated by the infrared heating module is omnidirectionally reflected by the multi-faceted reflective columns.

[0008] Furthermore, the multi-faceted reflective modules are positioned between the lower infrared heating module and the conveyor belt, with each group of multi-faceted reflective modules having the same and / or different numbers of multi-faceted reflective columns.

[0009] Furthermore, the tunnel furnace includes several adjusting elements, and each set of multi-faceted reflective modules is controlled to rotate by an adjusting element, with at least a portion of the adjusting element installed on the outer wall of the tunnel furnace.

[0010] Furthermore, the tunnel furnace includes a positioning module, which positions the relative position of each group of multi-faceted reflective modules in the heating area and forms a position database.

[0011] Furthermore, the tunnel furnace includes a temperature module for monitoring the temperature at various locations within the heating zone. The temperature module is electrically connected to a positioning module, which locates the relative position of the temperature to be adjusted (which exceeds the preset temperature range) within the heating zone, thus obtaining the position to be adjusted.

[0012] Furthermore, the positioning module compares the position to be adjusted in the position database to find the adjustment element corresponding to the position to be adjusted.

[0013] Furthermore, the tunnel furnace includes a control panel, which is electrically connected to a temperature module, a positioning module, and an adjustment element. The control panel controls the adjustment element, thereby controlling the rotation of the polygonal reflector module.

[0014] Furthermore, the control panel presets a radiation path database for the infrared heating module and collects the radiation intensity of the infrared heating module and the reflection path of the polygonal reflector module in real time.

[0015] Furthermore, the control panel controls the infrared radiation reflected by at least one set of multi-faceted reflective modules along the paths in the path database based on the path database.

[0016] Furthermore, the present invention also provides a method for constructing a path database, comprising:

[0017] A. A table showing the correspondence between the radiation range, radiation intensity, and heating temperature of multiple reference points for the upper and lower infrared heating modules;

[0018] B. A table storing the reflection range of multiple reference points for each reflective facet of the multi-faceted reflective module;

[0019] C. The rotation path of the multi-faceted reflector module when its reflection range is outside the above-mentioned radiation range, and the rotation path of the multi-faceted reflector module when the radiation intensity required to reach the preset temperature is reached.

[0020] D. Provides information on the relative positions of the radiation ranges of the upper and lower infrared heating modules within the tunnel furnace, as well as the relative positions of the reflection ranges of each reflective prism within the tunnel furnace;

[0021] E. Repeat steps A to D until a complete path database is obtained, showing that the reflection range of the polygonal reflective module and the radiation range of the infrared heating module cover the heating area of ​​the tunnel furnace and that the radiation intensity matches the preset temperature.

[0022] Furthermore, the present invention also provides a method for temperature control of an infrared tunnel furnace, comprising:

[0023] a. The control panel collects the radiation intensity of the infrared heating module's radiation range and the reflection path of each group of multi-faceted reflective modules in real time, i.e., the path information is obtained from the reflection range;

[0024] b. The temperature module monitors the temperature at various locations within the heating area of ​​the tunnel furnace in real time. When the temperature exceeds the preset range, the temperature to be adjusted is obtained. The positioning module locates the relative position of the temperature to be adjusted within the tunnel furnace to obtain the position to be adjusted.

[0025] c. The positioning module compares the position to be adjusted in the position database, finds the adjustment element corresponding to the position to be adjusted, and sends the relevant information of the adjustment element and the temperature to be adjusted to the control panel;

[0026] d. The control panel compares the path information and the temperature to be adjusted in the path database, finds the radiation range corresponding to the adjustment element, and obtains the adjustment information. The adjustment information includes the reflection path of the multi-faceted reflector module, the rotation direction and rotation angle of the multi-faceted reflector module, and the rotation direction and rotation angle of the adjustment element in order to achieve the preset temperature range.

[0027] e. The control panel controls the rotation of the adjustment elements based on the adjustment information.

[0028] Furthermore, the tunnel furnace of the present invention includes a feeding zone, a heating zone and a discharging zone. The feeding zone includes a first vacuum component, and a first heat insulation plate is provided in the area adjacent to the heating zone. The discharging zone includes a second vacuum component, and a second heat insulation plate is provided in the area adjacent to the heating zone.

[0029] Furthermore, the tunnel furnace of the present invention has several ventilation pipes symmetrically arranged in the heating zone, and also has a heat circulation channel, which achieves uniform temperature in all areas of the tunnel furnace.

[0030] The beneficial technical effects of this invention are as follows:

[0031] This invention employs multiple sets of multi-faceted reflective modules composed of reflective prisms at different tilt angles to provide reflections in different directions, further expanding the reflection range and allowing for more precise control over it. These multiple sets of multi-faceted reflective modules cover the bandwidth of the transmission belt, enabling more comprehensive reflection of infrared light incident on the belt. Furthermore, the multi-faceted reflective modules of this invention can rotate relative to the infrared heating module, thereby altering their reflection range and ensuring the temperature inside the tunnel furnace reaches the preset temperature.

[0032] The infrared radiation radiated by the upper infrared heating module of this invention can pass through the gap of the conveyor belt to reach the multi-faceted reflector module and be reflected by it. The infrared radiation radiated by the lower infrared heating module can be reflected by the multi-faceted reflector module to the upper side of the conveyor belt, thereby improving the heating efficiency of the heating area and enabling the material to be heated quickly on both the upper and lower sides, thereby reducing the temperature difference between the upper and lower sides and making the heating more uniform.

[0033] This invention utilizes an automated multi-faceted reflector module, resulting in higher heating precision and adjustment efficiency. Through the combined action of the control panel, temperature module, and positioning module, this invention enables targeted temperature adjustments within the furnace. By combining real-time collected location and path information with a preset location database from the positioning module and a preset path database from the control panel, adjustment information is calculated and analyzed to obtain an optimized scheme for adjusting the furnace temperature to the preset temperature, allowing for rapid temperature adjustment. This invention employs a location-based temperature adjustment method, altering the overall radiation intensity and heating temperature at various heating positions within the furnace by changing the reflection range of the multi-faceted reflector module without altering the radiation intensity of the infrared heating module. This promotes constant and uniform heating within the furnace. Furthermore, under the automated control of the positioning module and control panel, the tunnel furnace achieves high heating precision and efficiency, making it suitable for factory assembly line production and enabling simultaneous temperature adjustments at multiple locations within the tunnel furnace.

[0034] In summary, this invention, through an automated rotating multi-faceted reflective module, can improve heating efficiency, reduce energy consumption, and enhance heating uniformity. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a high-efficiency infrared tunnel furnace according to the present invention;

[0036] Figure 2 This is a partial structural schematic diagram of a high-efficiency infrared tunnel furnace according to the present invention.

[0037] Figure Labels

[0038] 1: Feeding area; 2: Heating area; 3: Discharge area; 4: Conveyor belt; 11: First vacuum component; 12: First insulation plate; 31: Second vacuum component; 32: Second insulation plate; 21: Upper infrared heating module; 22: Lower infrared heating module; 23: Multi-faceted reflector module; 231: Multi-faceted reflector column; 232: Mirror barrel; 241: Operating lever; 24: Adjusting element; 242: Rotary handle; 243: Mounting base; 25: Temperature module; 26: Positioning module; 27: Control panel; A: Center line; 28: Fan. Detailed Implementation

[0039] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should be understood that certain features of the invention (described in the context of separate embodiments for clarity) may also be provided in combination in a single embodiment. Conversely, multiple features of the invention (described in the context of a single embodiment for brevity) may also be provided separately or in any suitable combination or, where appropriate, in any other described embodiment of the invention. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiment is inoperable without those elements. The invention is further illustrated below by specific examples; all equivalent changes or modifications made in accordance with the spirit and essence of the invention should be covered within the scope of protection of this invention.

[0040] like Figure 1 As shown, this invention provides a high-efficiency infrared tunnel furnace, including a chain conveyor belt 4. The tunnel furnace contains a feeding zone 1, a heating zone 2, and a discharging zone 3 arranged sequentially. Material is placed on the chain conveyor belt 4, enters the heating zone 2 through the feeding zone 1 for heating, and exits the tunnel furnace through the discharging zone 3. The feeding valve in the feeding zone 1 and the discharging valve at the discharging port are inductive valves. When material enters the sensing range, the feeding valve and the discharging valve open; when material leaves the sensing range, the feeding valve and the discharging valve close. This inductive control of the valve opening and closing reduces the amount of cold air entering the tunnel furnace, improving the working efficiency of the tunnel furnace.

[0041] Preferably, the top wall of the feeding zone 1 of the present invention is provided with a first vacuum component 11 for sucking air from the feeding zone 1. The first vacuum component 11 ensures that the feeding zone 1 is in a vacuum environment with no airflow in the area, thereby avoiding gas exchange between the feeding zone 1 and the heating zone 2, which in turn leads to heat exchange and reduces the heating efficiency of the heating zone 2.

[0042] Preferably, two first insulation plates 12 are provided in the adjacent area between the feeding zone 1 and the heating zone 2 of the present invention. The two first insulation plates 12 can be arranged in parallel or staggered. The first insulation plates 12 are telescopic structures, and when the first insulation plates 12 are extended, they can isolate the feeding zone 1 and the heating zone 2. The first insulation plates 12 can also be set as automatic sensing telescopic structures. When the material is not within the sensing range of the first insulation plates 12, both first insulation plates 12 are in an extended state, separating the feeding zone 1 and the heating zone 2; when the material enters the sensing range of the first insulation plates 12, the first insulation plate 12 on the side closer to the feeding zone 1 retracts to allow the material to pass through. After the material passes through, the first insulation plate 12 on the side closer to the heating zone 2 retracts, and the first insulation plate 12 on the side closer to the feeding zone 1 returns to its original length. This configuration ensures that the feeding zone 1 and the heating zone 2 are always separated, preventing hot air from entering the feeding zone 1 and causing heat loss from the heating zone 2. This improves the heating efficiency of the heating zone 2 and enhances the insulation effect of the tunnel furnace.

[0043] Preferably, a second vacuum element 31 for evacuating air from the discharge zone 3 is provided on the top wall of the discharge zone 3. The second vacuum element 31 ensures that the discharge zone 3 is in a vacuum environment, preventing airflow within the zone and avoiding gas exchange between the discharge zone 3 and the heating zone 2, which would lead to heat loss in the heating zone 2 and reduce its heating efficiency. Since both the feeding zone 1 and the discharge zone 3 are inductively opened and closed, the first vacuum element 11 and the second vacuum element 31 of the present invention have high vacuum efficiency. Two second heat insulation plates 32 are provided in the area adjacent to the discharge zone 3 and the heating zone 2. These second heat insulation plates 32 have the same structure and function as the first heat insulation plate 12 in the feeding zone 1, both being inductively telescopic structures used to separate the discharge zone 3 and the heating zone 2, preventing heat loss from the heating zone 2.

[0044] Preferably, the tunnel furnace of the present invention is divided along the horizontal centerline A to form an upper infrared heating module 21 and a lower infrared heating module 22. The infrared heating modules are configured to cover at least a portion of the conveyor belt 4 corresponding to the heating zone 2. The infrared heating modules provide heat to the material passing through the heating zone 2, allowing it to react in a constant temperature environment. The conveyor belt 4 of the present invention is a chain conveyor belt 4, or a mesh belt with several hollow structures, etc.

[0045] Preferably, the present invention includes at least one set of multi-faceted reflective modules 23 arranged and rotated to generate infrared reflection within the tunnel furnace. Each multi-faceted reflective module 23 covers the bandwidth of the conveyor belt 4 and is composed of several reflective prisms with different inclination angles. Each multi-faceted reflective module 23 includes several multi-faceted reflective pillars 231 providing gaps. A portion of the infrared radiation radiated by the infrared heating module passes through the gaps, while another portion reaches the multi-faceted reflective pillars 231 and is omnidirectionally reflected. The multi-faceted reflective modules 23 are positioned between the lower infrared heating module and the conveyor belt 4, with each set of multi-faceted reflective modules 23 having the same and / or different numbers of multi-faceted reflective pillars 231. With this configuration, part of the infrared radiation radiated by the upper infrared heating module 21 reaches the material surface, while the other part passes through the hollow structure of the conveyor belt 4 and reaches the polygonal reflector module 23, where it is reflected in all directions. Part of the infrared radiation radiated by the lower infrared heating module 22 passes through the gaps between several polygonal reflector columns 231 and the hollow structure of the conveyor belt 4 to reach the material surface, while the other part is directly reflected by the polygonal reflector columns 231 in all directions, from the lower side of the conveyor belt 4 to the upper side of the conveyor belt 4, so as to achieve uniform heating in the tunnel furnace and reduce heating energy consumption.

[0046] Specifically, the multiple facets of the polygonal reflector 231 can have the same or different shapes, and the facets can be rectangular, trapezoidal, triangular, etc. This invention expands the reflection range of the polygonal reflector 231 by using different facet angles or inconsistent reflection ranges in different parts of the facets. The polygonal reflector 231 of this invention is an infrared reflector with a surface coated with silver, molybdenum, or other coatings, achieving a reflectivity of 90%.

[0047] Specifically, the multiple polygonal reflective columns 231 of each group of polygonal reflective modules 23 are identical and have the same installation angle, so as to control the reflection range of each group of polygonal reflective modules 23.

[0048] Preferably, the present invention uses a single power source to drive the multi-faceted reflective module 23 to rotate in the tunnel furnace, so as to achieve synchronous and precise control of the rotation of a group of multi-faceted reflective columns 231. The two ends of the multi-faceted reflective columns 231 are respectively fixedly installed in the mirror barrel 232. The multi-faceted reflective columns 231 are installed in the tunnel furnace through the mirror barrel 232. This installation and driving method reduces the vibration intensity of the multi-faceted reflective module 23 during rotation, and improves the service life and working accuracy of the multi-faceted reflective module 23.

[0049] Preferably, the tunnel furnace includes several adjusting elements 24, and each group of multi-faceted reflective modules 23 is controlled to rotate by one adjusting element 24. The adjusting elements 24 are installed on the outer wall of the tunnel furnace. The adjusting element 24 includes an operating rod 241 connected to several mirror barrels 232, a mounting base 243, a rotating handle 242, an electric cylinder and other drivers, and a displacement sensor. The mirror barrels 232 are disposed through the upper part of the mounting base 243. The rotating handle 242 of the present invention is provided with adjustment markings such as rotation scale. The adjusting element 24 can be manually controlled or automatically controlled. The movement of the operating rod 241 is precisely controlled by the driver to achieve synchronous real-time control of multiple multi-faceted reflective columns 231, and the displacement of the operating rod 241 is fed back in real time by the displacement sensor to achieve closed-loop control and improve the working accuracy of the multi-faceted reflective modules 23.

[0050] Preferably, the tunnel furnace includes a positioning module 26. The positioning module 26 positions each group of polygonal reflective modules 23 relative to the heating zone 2 and forms a position database. When the tunnel furnace is not heating, the positioning module 26 positions each group of polygonal reflective modules 23 to obtain its position in the heating zone 2. This position is a range position, including the heating zone 2 area corresponding to one group of polygonal reflective modules 23. For example, the position of the first group of polygonal reflective modules 23 is positioned as the first position. Multiple positions are then established. Simultaneously, the positioning module 26 positions several adjusting elements 24 to form a table corresponding to adjusting elements 24, polygonal reflective modules 23, and range positions, thereby forming the position database. When the tunnel furnace is heating, the positioning module 26 positions locations with uneven temperatures and compares their positions with the position database to determine if they belong to a specific range position, such as the first position. When the positioning module 26 compares locations and finds that the location with uneven temperatures is included by two range positions, it positions the center point of the location with uneven temperatures and compares this center point position with the position database to determine its range position.

[0051] Preferably, the tunnel furnace includes a temperature module 25 for monitoring the temperature at various locations within the heating zone 2. The temperature module 25 is electrically connected to a positioning module 26. The positioning module 26 locates the relative position of the temperature to be adjusted (exceeding the preset temperature range) within the heating zone 2, thus obtaining the position to be adjusted. The preset temperature range of this invention is the temperature range required for the material reaction. The temperature module 25 monitors the temperature within the heating zone 2 in real time. When the temperature to be adjusted is detected, it sends a temperature signal to the positioning module 26. After receiving the temperature signal, the positioning module 26 locates the position of the temperature to be adjusted, obtains the position to be adjusted, and compares the position to be adjusted with a position database to determine the corresponding regulating element 24.

[0052] Preferably, the tunnel furnace includes a control panel 27, which is electrically connected to a temperature module 25, a positioning module 26, and an adjustment element 24. The control panel 27 controls the adjustment element 24, thereby controlling the rotation of the polygonal reflector module 23. The control panel 27 presets a path database for the radiation from the infrared heating module and collects the radiation intensity of the infrared heating module and the reflection path of the polygonal reflector module 23 in real time. Based on the path database, the control panel 27 controls at least one group of polygonal reflector modules 23 to radiate infrared rays reflected along the paths in the path database. Specifically, the control panel 27 acquires the temperature information collected by the temperature module 25, the position information to be adjusted matched by the positioning module 26, and the corresponding adjustment element 24 information. The control panel 27 processes and analyzes the above information, radiation intensity, reflection path, etc., to obtain adjustment information.

[0053] Specifically, the present invention also provides a method for constructing a path database, comprising:

[0054] A. Store a table showing the radiation range, radiation intensity, and heating temperature that can be reached at a given radiation intensity for a plurality of reference points of the upper infrared heating module 21 and the lower infrared heating module 22.

[0055] B. Store the reflection range table of multiple reference points for each reflection facet of each polygonal reflector 231, store the reflection range of each group of polygonal reflector modules 23, store the reflection range of the reflection facet tilt angle, and obtain the reflection range table corresponding to the facet tilt angle - facet area - number of polygonal reflector 231.

[0056] C. Store the correspondence table between the rotation angle and the position of the reflection range of the multi-faceted reflective module 23, store the rotation angle and rotation path of the multi-faceted reflective module 23 when the reflection range of the multi-faceted reflective module 23 is not within the radiation range of the infrared heating module, store the radiation intensity within the reflection range of the multi-faceted reflective module 23, and store the rotation path of the multi-faceted reflective module 23 when the radiation intensity required to reach the preset temperature is reached.

[0057] D. Provides the relative position information of the upper infrared heating module 21 and the lower infrared thermal heating module in the tunnel furnace, and provides the relative position information of each set of multi-faceted reflective modules 23 in the tunnel furnace;

[0058] E. Repeat steps A to D until a complete path database is obtained, showing that the reflection range of the polygonal reflection module 23 and the radiation range of the infrared heating module cover the tunnel furnace heating zone 2 and the radiation intensity matches the preset temperature.

[0059] The aforementioned path database includes the radiation intensity required at each location within the tunnel furnace heating zone 2 when the preset temperature is met, the reflection range of the corresponding polygonal reflector module 23 that can provide the required radiation intensity to that location, and the rotation path of the polygonal reflector module 23 relative to its initial installation position within the reflection range.

[0060] Specifically, the present invention also provides a method for temperature control of an infrared tunnel furnace, comprising the following steps:

[0061] a. The control panel 27 collects the radiation intensity of the upper infrared heating module 21 and the lower infrared heating module 22 in real time, as well as the reflection path and reflection range of the infrared rays emitted by them in the polygonal reflection module 23, to obtain path information.

[0062] b. Temperature module 25 monitors the temperature at various locations within the heating zone 2 of the tunnel furnace in real time. When the temperature exceeds the preset range, the temperature to be adjusted is obtained. Positioning module 26 locates the relative position of the temperature to be adjusted within the tunnel furnace to obtain the position to be adjusted.

[0063] c. The positioning module 26 compares the position to be adjusted in the position database, finds the adjustment element 24 corresponding to the position to be adjusted, and sends the relevant information of the adjustment element 24 and the temperature to be adjusted to the control panel 27;

[0064] d. The control panel 27 compares the path information and the temperature to be adjusted in the path database, finds the radiation range corresponding to the adjustment element 24, and obtains the adjustment information, which includes the reflection path of the multi-faceted reflection module 23, the rotation direction and rotation angle of the multi-faceted reflection module 23, and the rotation direction and rotation angle of the adjustment element 24 in order to achieve the preset temperature range.

[0065] e. Based on the adjustment information, the control panel 27 controls the rotation of the adjustment element 24. The displacement sensor provides real-time feedback to the control panel 27 on the displacement of the operating lever 241. The control panel 27 obtains the real-time rotation information of the polygonal reflector module 23 based on this displacement and uses this real-time rotation information to precisely control the adjustment element 24, so that the infrared rays reflected by the polygonal reflector module 23 radiate along the path in the path database.

[0066] Preferably, the tunnel furnace heating zone 2 of the present invention is symmetrically provided with several ventilation pipes and a heat circulation channel, which achieves uniform temperature in all areas of the tunnel furnace. Specifically, the ventilation pipes are connected through the heat circulation channel, which can exchange heat between the upper and lower sides of the tunnel furnace heating zone 2, thereby achieving uniform temperature on both sides of the tunnel furnace.

[0067] Preferably, the upper infrared heating module 21 is fixedly connected to a fan 28 via a support member. The fan 28 can drive the air flow inside the tunnel furnace to achieve uniform heating.

[0068] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A high-efficiency infrared tunnel furnace, characterized in that, The tunnel furnace has a continuous conveyor belt (4) for conveying a quantity of material through the heating zone of the tunnel furnace in a transverse process path direction, the tunnel furnace comprising the following operational combinations: An infrared heating module is formed by dividing the horizontal center line (A) into an upper and a lower part, and the infrared heating module is configured to cover at least a portion of the transmission belt (4) corresponding to the heating area; At least one set of polygonal reflective modules (23) arranged and rotated to generate infrared reflection in the tunnel furnace, the polygonal reflective modules (23) covering the bandwidth of the conveyor belt (4), the polygonal reflective modules (23) being composed of several reflective prisms with different tilt angles; The tunnel furnace includes several adjusting elements (24), and each set of the multi-faceted reflective modules (23) is controlled to rotate by one of the adjusting elements (24). At least a portion of the adjusting element (24) is installed on the outer wall of the tunnel furnace. The tunnel furnace includes a positioning module (26), which positions each set of the multi-faceted reflective modules (23) relative to the heating area and forms a position database.

2. The high-efficiency infrared tunnel furnace according to claim 1, characterized in that, The multi-faceted reflective module (23) includes a number of multi-faceted reflective columns (231) arranged at intervals. The multi-faceted reflective module (23) is located between the lower infrared heating module and the transmission belt (4). The number of multi-faceted reflective columns (231) in each group of multi-faceted reflective modules (23) may be the same or different.

3. The high-efficiency infrared tunnel furnace according to claim 1, characterized in that, The tunnel furnace includes a temperature module (25) for monitoring the temperature at various locations inside the heating zone. The temperature module (25) is electrically connected to the positioning module (26). The positioning module (26) positions the relative position of the temperature to be adjusted that exceeds the preset temperature range monitored by the temperature module (25) in the heating zone, thereby obtaining the position to be adjusted.

4. The high-efficiency infrared tunnel furnace according to claim 3, characterized in that, The positioning module (26) compares the position to be adjusted in the position database and determines the adjustment element (24) corresponding to the position to be adjusted.

5. The high-efficiency infrared tunnel furnace according to claim 4, characterized in that, The tunnel furnace includes a control panel (27), which is electrically connected to the temperature module (25), the positioning module (26) and the adjustment element (24). The control panel (27) controls the rotation of the multi-faceted reflective module (23) by controlling the adjustment element (24).

6. The high-efficiency infrared tunnel furnace according to claim 5, characterized in that, The control panel (27) presets the radiation path database of the infrared heating module and collects the radiation intensity of the infrared heating module and the reflection path of the polygonal reflection module (23) in real time.

7. The high-efficiency infrared tunnel furnace according to claim 6, characterized in that, The control panel (27) controls the infrared radiation reflected by at least one set of the polygonal reflector modules (23) to radiate along the path in the path database based on the path database.

8. A temperature control method for a high-efficiency infrared tunnel furnace according to any one of claims 1 to 7, characterized in that, Includes the following steps: A. Control panel (27) collects the radiation intensity of the infrared heating module's radiation range and the radiation intensity of each group in real time. The reflection path of the multi-faceted reflection module (23) is obtained, and the path information is obtained; B. Temperature module (25) monitors the temperature at various locations within the tunnel furnace heating area in real time. When the temperature is detected... When the temperature exceeds the preset temperature range, the temperature to be adjusted is obtained, and the positioning module (26) positions the relative position of the temperature to be adjusted in the tunnel furnace to obtain the position to be adjusted; C. The positioning module (26) compares the position to be adjusted with its preset position database, finds the adjustment element (24) corresponding to the position to be adjusted, and sends the relevant information of the adjustment element (24) and the temperature to be adjusted to the control panel (27). D. The control panel (27) compares the path information and the temperature to be adjusted in the path database, finds the radiation range corresponding to the adjustment element (24), and obtains the adjustment information; E. The control panel (27) controls the rotation of the adjustment element (24) based on the adjustment information, so that the infrared rays reflected by at least one set of multi-faceted reflective modules (23) radiate along the path in the path database.

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