Energy-saving oven and control method thereof

Abstract

The application provides an energy-saving oven and a control method thereof. The oven comprises a heating mechanism, the heating mechanism comprises two first side plates arranged oppositely, a first top plate arranged at the top end of the two first side plates, two air inlet plates and an air outlet plate forming a transversely extending inner cavity, a plurality of fans and a plurality of lamp tube assemblies, the air inlet plates and the air outlet plate are respectively arranged at the inner side of the first side plates and the first top plate in a spaced manner; the air inlet plates are provided with inwardly inclined first inclined plates at the two ends, the air inlet plates and the first inclined plates are both provided with a plurality of air inlet holes, the hole walls of the air inlet holes extend outwardly and the hole diameters gradually decrease; the air outlet plate comprises a perforated sub-plate provided with a plurality of air outlet holes, two adjacent perforated sub-plates are connected to form a V-shaped structure, the hole walls of the air outlet holes extend inwardly and the hole diameters gradually decrease. The application can effectively reduce the energy consumption of the oven.

Description

Technical Field

[0001] This invention relates to the field of shoemaking, and in particular to an energy-saving oven and its control method. Background Technology

[0002] In recent years, with the continuous advancement of technology, more and more high-tech and high-content products have emerged, and intelligent automated molding production lines have become increasingly popular in the footwear industry. Faced with fierce market competition, customers are placing increasingly higher demands on the energy efficiency of new production lines to reduce costs. Ovens consume the most energy in the entire automated production line, accounting for over 60%.

[0003] Current ovens only focus on the impact of lamp temperature on their performance and energy consumption, neglecting the impact of airflow on oven performance and energy consumption. For example, current ovens have crude air duct designs, failing to consider the impact of air duct structure on energy saving. The existing air duct box structure, air outlet, and air inlet structures result in significant air energy loss. Current ovens have only one thermocouple sensor per inner cavity, measuring only a relatively small range of oven temperatures. The measured temperature deviates significantly from the overall required oven temperature and cannot represent the overall oven temperature, thus failing to reasonably control oven energy consumption. Current ovens lack airflow sensors in the inner cavity, ignoring the importance of proper airflow for oven energy saving. The control logic for the fan in current ovens is too simple, only showing "not started" and "stopped," and cannot perform frequency conversion control based on the required fan speed. Summary of the Invention

[0004] The main objective of this invention is to propose an energy-saving oven and its control method, which can effectively reduce the energy consumption of the oven.

[0005] This invention is achieved through the following technical solution:

[0006] An energy-saving oven includes a heating mechanism, which includes two first side plates arranged opposite to each other and a first top plate disposed at the top of the two first side plates, two air inlet plates and an air outlet plate forming a transversely extending inner cavity, a plurality of fans and a plurality of lamp tube assemblies, wherein the air inlet plates and the air outlet plates are respectively spaced apart and disposed inside the first side plates and the first top plate.

[0007] An air inlet channel is formed between the air inlet plate and the first side plate. The fan is installed on the first side plate and its air inlet is connected to the air inlet channel. The air inlet plate has inwardly inclined first inclined plates at both ends. Several air inlet holes are opened on both the air inlet plate and the first inclined plates. The walls of the air inlet holes extend outward and the diameter of the holes gradually decreases.

[0008] An air outlet channel is formed between the air outlet plate and the first top plate. The air outlet of the fan is connected to the air outlet channel. The air outlet plate includes multiple sets of sub-plates connected in sequence. Each sub-plate includes a lamp tube sub-plate arranged horizontally to install lamp tube assemblies and an opening sub-plate that is inclinedly arranged on both sides of the lamp tube sub-plate and has several air outlet holes. Two adjacent opening sub-plates are connected to form a V-shaped structure. The walls of the air outlet holes extend inward and the hole diameter gradually decreases.

[0009] The workpiece that needs to be heated on the side is located inside the inner cavity. The lamp assembly irradiates the inner cavity. Under the action of the fan, the hot air in the inner cavity enters the air inlet channel through the air inlet hole, then enters the fan air inlet, and enters the air outlet channel through the fan air outlet. The hot air in the air outlet channel enters the inner cavity through the air outlet hole and blows to both sides of the workpiece.

[0010] Furthermore, the lamp assembly includes a lampshade and an infrared lamp disposed within the lampshade. The lampshade includes a horizontally arranged second top plate, second inclined plates disposed on both sides of the second top plate and inclined outward from top to bottom, and end plates disposed at the ends of the top plate and the second inclined plates.

[0011] Furthermore, it also includes multiple sets of thermocouple sensors and multiple sets of wind speed sensors, which are mounted on the first side plate and extend into the inner cavity.

[0012] Furthermore, the lamp tube sub-plate includes a clearance hole for the lamp tube, two clamping plates disposed at the edge of the clearance hole and extending outward, the clamping plates having a transverse U-shaped cross-section with the opening of the transverse U-shape facing the clearance hole, and the lower end of the second inclined plate having a horizontally extending insert plate that is inserted into the opening to allow the lamp cover to be installed on the lamp tube sub-plate.

[0013] Furthermore, the air outlet plate is also provided with upwardly extending baffles at both ends.

[0014] Furthermore, a first vertical plate is provided at the free end of the first inclined plate, a second vertical plate extending backward is provided at the free end of the first vertical plate, and a third vertical plate parallel to the first vertical plate is provided at the free end of the second vertical plate. The cross-sections of the first, second, and third vertical plates are U-shaped.

[0015] Furthermore, the angle between the second inclined plate and the horizontal plane satisfy ,in, , , GC This refers to the distance between the second top plate of the lampshade and the lamp tube plate. BC is half the distance between the lower ends of the two second inclined plates of the lamp cover, L2 is the distance between the center of the infrared lamp tube and the lamp tube sub-plate, H2 is the distance between the centers of two adjacent infrared lamp tubes, and H2 is the distance between the lamp tube sub-plate and the workpiece. BC, L2, and H2 are all known quantities.

[0016] Furthermore, it also includes a housing and a conveyor belt, the housing enclosing the heating mechanism and the conveyor belt traversing the inner cavity of the heating mechanism to transport the workpiece.

[0017] Furthermore, it includes multiple heating mechanisms stacked on top of each other.

[0018] This invention is also achieved through the following technical solutions:

[0019] The control method for the energy-saving oven as described in any of the preceding claims includes the following steps:

[0020] Step S1: Start-up and heating process: All infrared lamps operate at full power, the fan corresponding to the middle section of the inner cavity operates at full power P1, and the fans corresponding to the two sides of the inner cavity operate at power nP1. The wind speed is greater than the target wind speed V0, where n < 100%.

[0021] Step S2, reaching the target temperature t0, constant temperature process: the operating power of all fans is reduced, so that the wind speed in the middle section of the inner cavity is reduced to the target wind speed V0 and the wind speed in the two sides of the inner cavity is reduced to nV0.

[0022] Step S3: After reaching the target temperature t0, the temperature continues to rise. Cooling process: reduce the operating power of each infrared lamp tube, increase the operating power of each fan so that the wind speed in the inner cavity is greater than the target wind speed V0, and at the same time ensure that the wind speed of the fans on both sides of the inner cavity is higher than the wind speed of the fans in the middle section of the inner cavity.

[0023] Step S4: After reaching the target temperature t0, the temperature decreases. During the heating process, the operating power of each infrared lamp is increased, the fan corresponding to the middle section of the inner cavity runs at full power, and the fans corresponding to the two sides of the inner cavity run at power nP1 with a wind speed greater than the target wind speed.

[0024] The actual temperature inside the cavity is obtained by averaging the data measured by each thermocouple sensor, and the actual wind speed inside the cavity is obtained by averaging the data measured by each wind speed sensor.

[0025] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. During operation, the lamp assembly illuminates the inner cavity. Under the action of the fan, the hot air in the inner cavity enters the air inlet channel through the air inlet hole, then enters the fan air inlet, and finally enters the air outlet channel through the fan air outlet. The hot air in the air outlet channel enters the inner cavity through the air outlet hole and blows towards both sides of the workpiece, controlling the air circulation within the heating mechanism, thus achieving internal heat circulation and reducing the energy consumption of the oven. The sub-plate assembly of the air outlet plate includes a lamp tube sub-plate arranged horizontally to install the lamp assembly and perforated sub-plates respectively inclined on both sides of the lamp tube sub-plate with several air outlet holes. Two adjacent perforated sub-plates are connected to form a V-shaped structure. Since the perforated sub-plates are inclined, the air outlet holes on them are also inclined, and the air enters from the air outlet holes. The air inlet and outlet are also tilted when entering the cavity, so more air can be blown to the side of the workpiece, reducing the time it takes for the workpiece to reach the target state in the oven. It also reduces the amount of air that overflows from the openings at both ends of the cavity, thereby reducing the energy consumption of the oven. The diameter of the air inlet and outlet gradually decreases as the hole wall extends, which reduces the energy loss of air when entering and exiting the holes. With the air volume remaining constant, it also accelerates the air flow rate in the smaller diameter area, thereby reducing the time it takes for the workpiece to reach the target state in the oven. The air inlet plate has an inwardly inclined first slope at both ends, which can block the amount of air that overflows from the openings at both ends of the cavity, allowing more air to enter the air inlet channel through the air inlet, thereby reducing the energy consumption of the oven.

[0027] 2. The second inclined plate of the lampshade ensures that the side of the workpiece is also fully illuminated by the infrared lamp. The optimal angle between the second inclined plate and the horizontal plane can be obtained using the angle formula to achieve the best illumination effect.

[0028] 3. By setting up multiple sets of thermocouple sensors and multiple sets of wind speed sensors, the measured temperature and wind speed can be closer to the actual situation inside the cavity, serving as a more accurate reference when controlling the oven, thereby achieving better control results.

[0029] 4. The clamping plate of the lamp tube sub-board and the insertion plate of the lamp cover cooperate with each other to enable the lamp cover to be quickly and detachably installed on the lamp tube sub-board, with a reasonable and reliable structure.

[0030] 5. The air outlet plate has upward-extending baffles at both ends to prevent hot air from overflowing from the air outlet channel. The first, second and third vertical plates with a U-shaped cross section on the first inclined plate of the air inlet plate can also prevent hot air from overflowing from the air inlet channel, thereby further reducing the energy consumption of the oven.

[0031] 6. Multiple stacked heating mechanisms can be installed inside the housing, which can heat different workpieces according to actual production needs and improve production efficiency.

[0032] 7. A new fan speed parameter has been added to the oven control method. With the temperature fixed at the target temperature, the faster the fan speed, the faster the workpiece can reach the target state, thereby reducing the time the workpiece is heated in the oven. In terms of energy saving, this means reducing the energy consumed by the oven to produce the same number of shoes. Attached Figure Description

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Figure 1 This is a schematic diagram of the structure of the oven of the present invention.

[0035] Figure 2 This is another structural schematic diagram of the oven of the present invention (showing the heating mechanism).

[0036] Figure 3 This is another structural schematic diagram of the oven of the present invention (showing the convection plate).

[0037] Figure 4 This is a schematic diagram of the air inlet plate of the present invention.

[0038] Figure 5 for Figure 4 Enlarged view of section A.

[0039] Figure 6 This is a schematic diagram of the air outlet plate of the present invention.

[0040] Figure 7 This is another structural schematic diagram of the air outlet plate of the present invention.

[0041] Figure 8 This is a schematic diagram of the structure of the lampshade of the present invention.

[0042] Figure 9 This is a schematic diagram of the lamp tube assembly of the present invention.

[0043] Figure 10 This is a schematic diagram of the light illumination of the lamp tube assembly of the present invention.

[0044] Figure 11 This is a schematic diagram illustrating the calculation of the included angle of the lamp tube assembly of the present invention.

[0045] The components are as follows: 1. Shell; 2. Conveyor belt; 3. Heating mechanism; 31. First side plate; 32. First top plate; 33. Air inlet plate; 331. First inclined plate; 332. Air inlet hole; 333. Air inlet hole wall; 334. First vertical plate; 335. Second vertical plate; 336. Third vertical plate; 34. Air outlet plate; 341. Lamp tube sub-plate; 3411. Clearance hole; 3412. Clamping plate; 342. Opening sub-plate; 343. Air outlet hole; 344. Air outlet hole wall; 345. Baffle; 35. Fan; 351. Air outlet; 36. Lamp tube assembly; 3611. Second top plate; 3612. Second inclined plate; 3613. End plate; 3614. Insert plate; 362. Connecting plate; 363. Infrared lamp tube. Detailed Implementation

[0046] The present invention will be further described below through specific embodiments.

[0047] like Figures 1 to 11 As shown, the energy-saving oven includes two heating mechanisms 3 stacked on top of each other, a housing 1 that encloses the two heating mechanisms 3, and two conveyor belts 2 that cooperate with the two heating mechanisms 3 respectively. The lower conveyor belt 2 transports the shoe upper, and the upper conveyor belt 2 transports the shoe sole. The shoe upper and shoe sole can be baked in the oven at the same time.

[0048] The heating mechanism 3 includes two opposing first side plates 31 and a first top plate 32 disposed at the top of the two first side plates 31, two air inlet plates 33 and an air outlet plate 34 forming a laterally extending inner cavity, a plurality of fans 35, and a plurality of lamp tube assemblies 36. The air inlet plates 33 and the air outlet plates 34 are respectively spaced apart and disposed inside the first side plates 31 and the first top plate 32. The inner cavity has openings at both ends, and the conveyor belt 2 passes laterally through the inner cavity.

[0049] An air inlet channel is formed between the air inlet plate 33 and the first side plate 31. A fan 35 is mounted on the first side plate 31, and its air inlet connects to the air inlet channel. The air inlet plate 33 has inwardly inclined first slope plates 331 at both ends. A first vertical plate 334 is located at the free end of the first slope plate 331. A second vertical plate 335 extending backward is located at the free end of the first vertical plate 334. A third vertical plate 336 parallel to the first vertical plate 334 is located at the free end of the second vertical plate 335. The cross-sections of the first vertical plate 334, second vertical plate 335, and third vertical plate 336 are U-shaped. Both the air inlet plate 33 and the first slope plate 331 have several air inlet holes 332. The hole walls 333 extend outward relative to the inner cavity, and the hole diameter gradually decreases. The structure of the air inlet hole walls 333 is the same as that of the air outlet hole walls 344. The width of the second vertical plate 335 is greater than the distance between the air inlet plate 33 and the first vertical plate 334, which prevents hot air from escaping from the air inlet channel. In this embodiment, four sets of fans 35 are provided. Each set of fans 35 includes two fans 35 with corresponding positions. The air inlets of the two fans 35 are respectively connected to two air inlet channels.

[0050] An air outlet channel is formed between the air outlet plate 34 and the first top plate 32. The air outlet 351 of the fan 35 is connected to the air outlet channel. The air outlet plate 34 includes multiple sets of sub-plates connected in sequence and a baffle 345 located at the end and extending upward. The sub-plates include a lamp tube sub-plate 341 arranged horizontally to install the lamp tube assembly 36 and an opening sub-plate 342 that is inclinedly arranged on both sides of the lamp tube sub-plate 341 and has several air outlet holes 343. Two adjacent opening sub-plates 342 are connected to form a V-shaped structure. The wall of the air outlet hole 344 extends outward relative to the inner cavity and the hole diameter gradually decreases.

[0051] The lamp assembly 36 includes a lampshade and infrared lamps 363 disposed within the lampshade. The lampshade includes a horizontally arranged second top plate 3611, second inclined plates 3612 disposed on both sides of the second top plate 3611 and inclined outward from top to bottom, and end plates 3613 disposed at the ends of the top plate and the second inclined plates 3612. The infrared lamps 363 are spaced apart on the inner side of the second top plate 3611 via connecting plates 362. To achieve the best illumination effect, it is necessary to obtain the optimal angle between the second inclined plates 3612 and the horizontal plane. satisfy ,in, BG must meet the following conditions Only GF has a solution, and point B is the center of the 363-degree circle of the infrared lamp. GC This refers to the distance between the second top plate 3611 of the lampshade and the lamp tube plate 341. BC is half the distance between the lower ends of the two second inclined plates 3612 of the lamp cover, L2 is the distance between the center of the infrared lamp tube 363 and the lamp tube sub-plate 341, H2 is the distance between the centers of two adjacent infrared lamp tubes 363, and H2 is the distance between the lamp tube sub-plate 341 and the workpiece. BC, L2, and H2 are all known quantities. In this embodiment, BC = 30mm, L2 = 300mm, and H2 is in the range of 100~110mm. Therefore, CE is in the range of 60~69mm, and BG is taken as 16mm. This allows the energy of the infrared lamp tube 363 to be fully utilized and avoids energy waste.

[0052] To facilitate the installation and removal of the lamp tube assembly 36, the lamp tube subplate 341 includes a clearance hole 3411 through which the lamp tube protrudes, and two clamping plates 3412 disposed at the edge of the clearance hole 3411 and extending outward. The clamping plates 3412 have a transverse U-shaped cross section, with the opening of the transverse U-shape facing the clearance hole 3411. The lower end of the second inclined plate 3612 has a horizontally outward extending insert plate 3614, which is inserted into the opening to allow the lamp cover to be installed on the lamp tube subplate 341.

[0053] The workpieces that require more heating on the sides (such as the shoe upper and sole in this embodiment, which are baked in an oven after being glued, with the glued area being the side rather than the top) are located inside the cavity. The lamp assembly 36 irradiates the cavity. Under the action of the fan 35, the hot air in the cavity enters the air inlet channel through the air inlet hole 332, then enters the air inlet of the fan 35, and enters the air outlet channel through the air outlet 351 of the fan 35. The hot air in the air outlet channel enters the cavity through the air outlet hole 343 and blows towards the two sides of the workpiece.

[0054] To provide reference values ​​that more closely approximate the actual temperature and wind speed within the cavity during control, multiple sets of thermocouple sensors and multiple sets of wind speed sensors are installed. These sensors are mounted on the first side plate 31 and extend into the cavity. The specific locations of the thermocouple and wind speed sensors within the cavity can be determined according to actual requirements.

[0055] The control method for energy-saving ovens includes the following steps:

[0056] Step S1: Set the target temperature t0 and target wind speed V0, and number the four sets of fans 35 sequentially as No. 1, No. 2, No. 3 and No. 4 along the conveying direction of the conveyor belt 2;

[0057] Upon startup, the heating process begins: all infrared lamps 363 operate at full power, the fans 35 (No. 2 and No. 3) corresponding to the middle section of the inner cavity operate at full power P1, and the fans 35 (No. 1 and No. 4) corresponding to the two sides of the inner cavity operate at power nP1. The wind speed is greater than the target wind speed V0. At this time, the wind speed in the middle section of the inner cavity is the largest, and the wind speed in the two sides is less than that in the middle section, so that the heat is concentrated in the middle of the inner cavity, reducing the heat dissipated from the two sides of the inner cavity. Among these conditions, 80% < n < 100%.

[0058] Step S2: When the inner cavity reaches the target temperature t0, a constant temperature process is carried out: the operating power of all fans 35 is reduced, so that the wind speed in the middle section of the inner cavity is reduced to the target wind speed V0 and the wind speed on both sides of the inner cavity is reduced to nV0. The wind speed in the middle section and both sides of the inner cavity is measured by wind speed sensors. If multiple wind speed sensors are installed in the middle section and the sides of the inner cavity, the average value of the wind speed data collected by the corresponding wind speed sensors is taken.

[0059] Step S3: After the inner cavity reaches the target temperature t0, if the temperature continues to rise, a cooling process is carried out: reduce the operating power of each infrared lamp 363 to reduce energy loss, increase the operating power of each fan 35 to make the wind speed in the inner cavity greater than the target wind speed V0, and at the same time ensure that the wind speed of the fans 35 corresponding to the two sides of the inner cavity is higher than the wind speed of the fans 35 corresponding to the middle section of the inner cavity, so that the temperature drops as quickly as possible and is maintained at t0.

[0060] Step S4: After the inner cavity reaches the target temperature t0, the temperature drops, so the heating process is carried out: increase the operating power of each infrared lamp 363 to raise the temperature as soon as possible, the fan 35 corresponding to the middle section of the inner cavity runs at full power, and the fans 35 corresponding to the two sides of the inner cavity run at power nP1. The wind speed is greater than the target wind speed. At this time, the wind speed in the middle section of the inner cavity is the largest, and the wind speed in the two sides of the inner cavity is less than the wind speed in the middle.

[0061] Step S5, Power off: Both the fan 35 and the infrared lamp 363 are turned off;

[0062] The actual temperature inside the cavity is obtained by averaging the data measured by each thermocouple sensor, and the actual wind speed inside the cavity is obtained by averaging the data measured by each wind speed sensor.

[0063] In this invention, the terms "first," "second," and "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "left," "right," "front," and "rear" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this invention. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0065] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. An energy-saving oven, characterized in that: The heating mechanism includes two first side plates arranged opposite each other and a first top plate disposed at the top of the two first side plates, two air inlet plates and an air outlet plate forming a transversely extending inner cavity, several fans and several lamp tube assemblies, with the air inlet plates and the air outlet plates respectively spaced apart inside the first side plates and the first top plate; An air inlet channel is formed between the air inlet plate and the first side plate. The fan is installed on the first side plate and its air inlet is connected to the air inlet channel. The air inlet plate has inwardly inclined first inclined plates at both ends. Several air inlet holes are opened on both the air inlet plate and the first inclined plates. The walls of the air inlet holes extend outward and the diameter of the holes gradually decreases. An air outlet channel is formed between the air outlet plate and the first top plate. The air outlet of the fan is connected to the air outlet channel. The air outlet plate includes multiple sets of sub-plates connected in sequence. Each sub-plate includes a lamp tube sub-plate arranged horizontally to install lamp tube assemblies and an opening sub-plate that is inclinedly arranged on both sides of the lamp tube sub-plate and has several air outlet holes. Two adjacent opening sub-plates are connected to form a V-shaped structure. The walls of the air outlet holes extend inward and the hole diameter gradually decreases. The workpiece that needs to be heated on the side is located inside the inner cavity. The lamp assembly irradiates the inner cavity. Under the action of the fan, the hot air in the inner cavity enters the air inlet channel through the air inlet hole, then enters the fan air inlet, and enters the air outlet channel through the fan air outlet. The hot air in the air outlet channel enters the inner cavity through the air outlet hole and blows to both sides of the workpiece.

2. An energy-saving oven according to claim 1, characterized in that: The lamp assembly includes a lampshade and an infrared lamp tube disposed inside the lampshade. The lampshade includes a horizontally arranged second top plate, second inclined plates disposed on both sides of the second top plate and inclined outward from top to bottom, and end plates disposed at the ends of the top plate and the second inclined plates.

3. An energy-saving oven according to claim 2, characterized in that: It also includes multiple sets of thermocouple sensors and multiple sets of wind speed sensors, which are mounted on the first side plate and extend into the inner cavity.

4. An energy-saving oven according to claim 2 or 3, characterized in that: The lamp tube sub-plate includes a clearance hole for the lamp tube, two clamps set at the edge of the clearance hole and extending outward, the clamps having a transverse U-shaped cross-section with the opening of the transverse U-shape facing the clearance hole, and a horizontally extending insert plate at the lower end of the second inclined plate, the insert plate being inserted into the opening to allow the lamp cover to be installed on the lamp tube sub-plate.

5. An energy-saving oven according to claim 1, 2, or 3, characterized in that: The air outlet plate is also equipped with upward-extending baffles at both ends.

6. An energy-saving oven according to claim 1, 2, or 3, characterized in that: The first inclined plate has a first vertical plate at its free end, a second vertical plate extending backward at its free end, and a third vertical plate parallel to the first vertical plate at its free end. The cross-sections of the first, second, and third vertical plates are U-shaped.

7. An energy-saving oven according to claim 2 or 3, characterized in that: The angle between the second inclined plate and the horizontal plane satisfy ,in, , , GC This refers to the distance between the second top plate of the lampshade and the lamp tube plate. BC is half the distance between the lower ends of the two second inclined plates of the lamp cover, L2 is the distance between the center of the infrared lamp tube and the lamp tube sub-plate, H2 is the distance between the centers of two adjacent infrared lamp tubes, and H2 is the distance between the lamp tube sub-plate and the workpiece. BC, L2, and H2 are all known quantities.

8. An energy-saving oven according to claim 1, 2, or 3, characterized in that: It also includes a housing and a conveyor belt, the housing enclosing the heating mechanism and the conveyor belt traversing the inner cavity of the heating mechanism to transport workpieces.

9. An energy-saving oven according to claim 1, 2, or 3, characterized in that: It includes multiple heating mechanisms stacked on top of each other.

10. A control method for an energy-saving oven according to any one of claims 1 to 9, characterized in that: Includes the following steps: Step S1: Start-up and heating process: All infrared lamps operate at full power, the fan corresponding to the middle section of the inner cavity operates at full power P1, and the fans corresponding to the two sides of the inner cavity operate at power nP1. The wind speed is greater than the target wind speed V0, where n < 100%. Step S2, reaching the target temperature t0, constant temperature process: the operating power of all fans is reduced, so that the wind speed in the middle section of the inner cavity is reduced to the target wind speed V0 and the wind speed in the two sides of the inner cavity is reduced to nV0. Step S3: After reaching the target temperature t0, the temperature continues to rise. Cooling process: reduce the operating power of each infrared lamp tube, increase the operating power of each fan so that the wind speed in the inner cavity is greater than the target wind speed V0, and at the same time ensure that the wind speed of the fans on both sides of the inner cavity is higher than the wind speed of the fans in the middle section of the inner cavity. Step S4: After reaching the target temperature t0, the temperature decreases. During the heating process, the operating power of each infrared lamp is increased, the fan corresponding to the middle section of the inner cavity runs at full power, and the fans corresponding to the two sides of the inner cavity run at power nP1 with a wind speed greater than the target wind speed. The actual temperature inside the cavity is obtained by averaging the data measured by each thermocouple sensor, and the actual wind speed inside the cavity is obtained by averaging the data measured by each wind speed sensor.

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