Composite heating furnace

Abstract

The invention discloses a composite heating furnace which comprises a heating area, a constant temperature area and a cooling area, the heating area is provided with a feeding port and a first conveying mechanism, the constant temperature area is provided with a lifting mechanism for circularly lifting, and the cooling area is provided with a discharging port, a second conveying mechanism and a descending mechanism for circularly descending. The cooling area is located above the heating area, the cooling area and the heating area are adjacent to the front of the constant-temperature area, a carrier enters the heating area from the feeding port and is heated to the preset heating temperature, the bottom automatic door is opened, the first conveying mechanism conveys the carrier to the constant-temperature area, and the lifting mechanism grabs the carrier and lifts the carrier from the bottom to the top within the preset heat preservation time; and the top automatic door is opened, the translation mechanism transfers the carrier to the top of the cooling area, the descending mechanism drives the carrier to descend to the bottom within the preset cooling time, and then the carrier flows out from the discharging port through the second conveying mechanism. Through cooperation of the automatic door, the conveying mechanism and the chain conveying mechanism, seamless circulation of the carriers in heating, heat preservation and cooling areas is achieved, and linkage of multiple systems is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of baking furnaces, in particular to a composite heating furnace. Background Art

[0002] With the development of the photovoltaic industry, perovskites, with their extremely high conversion efficiency and cost-reduction potential, have become a key technology for next-generation photovoltaic cells. Annealing is a crucial step in perovskite production. This process, through heating and temperature control, promotes grain growth, removes impurities and defects, and improves the cell's photoelectric conversion efficiency. Annealing requires annealing furnaces, with the most common types currently being flat-plate heating annealing furnaces and conventional tunnel annealing furnaces.

[0003] Flat-plate heating annealing furnaces use a multi-layer structure, which limits production capacity. Compatibility with automated assembly lines requires the use of robotic arms, which is relatively costly. Each layer of the multi-layer structure has a separate heating plate, which consumes a lot of energy. Conventional tunnel annealing furnaces operate in an assembly line manner, and heating is generally performed by infrared lamps. To ensure temperature uniformity, the substrates require a relatively high conveying speed. To ensure sufficient annealing time for the substrates, the annealing furnace heating unit needs to be designed to be relatively long, resulting in a relatively large floor space and strict requirements on the factory site.

[0004] Therefore, it is hoped to propose a new composite heating furnace to overcome the above-mentioned defects. Summary of the Invention

[0005] The object of the present invention is to provide a composite heating furnace to solve the problems of large floor space and high cost of existing heating furnaces.

[0006] To achieve the above objectives, the present invention employs the following technical solution: a composite heating furnace comprising an upstream heating zone, a midstream constant temperature zone, and a downstream cooling zone. The heating zone is provided with an inlet for a carrier to enter and a first conveyor mechanism. The constant temperature zone is provided with an elevating mechanism for cyclical elevating. The cooling zone is provided with an outlet for the carrier to exit, a second conveyor mechanism, and a descending mechanism for cyclical descending. The cooling zone is located above the heating zone, and both are adjacent to the front of the constant temperature zone. The composite heating furnace includes a bottom automatic door between the heating and constant temperature zones, and a top automatic door and a translation mechanism between the constant temperature and cooling zones. The carrier carries a product into the heating zone from the feed port, and the product is heated to a predetermined heating temperature within a predetermined heating time. The bottom automatic door opens and the first conveying mechanism conveys the carrier to the constant temperature zone. The lifting mechanism grabs the carrier and lifts the carrier from the bottom to the top within a predetermined insulation time. At this time, the top automatic door opens, and the translation mechanism transfers the carrier at the top of the constant temperature zone to the top of the cooling zone. The descending mechanism drives the carrier to descend from the top to the bottom within a predetermined cooling time. At this time, the product in the carrier drops to a predetermined cooling temperature, and then the second conveying mechanism causes the carrier to flow out of the discharge port.

[0007] In a preferred embodiment, the composite heating furnace includes a heating furnace and an insulation furnace, the heating furnace is located below the insulation furnace, the heating furnace has the heating zone, the insulation furnace has the constant temperature zone and the cooling zone, and the constant temperature zone and the cooling zone are separated and sealed by the top automatic door.

[0008] In a preferred embodiment, the heating furnace is provided with an automatic feeding door corresponding to the feeding port, the constant temperature furnace is provided with an automatic discharging door corresponding to the discharging port, and the automatic discharging door is located above the automatic feeding door.

[0009] In a preferred embodiment, the composite heating furnace includes a temporary storage area for feeding and discharging materials located in front of the heating furnace, and the temporary storage area for feeding and discharging materials is provided with a feeding position located below and a discharging position located above. The feeding position is located in front of the feeding port and is provided with a third conveying mechanism. When the automatic feeding door is opened, the third conveying mechanism drives the carrier from the feeding port into the heating zone; the discharging position is located in front of the discharging port. When the automatic discharging door is opened, the second conveying mechanism in the cooling zone drives the carrier to flow out through the discharging port to the discharging position.

[0010] In a preferred embodiment, the composite heating furnace includes a synchronous lifting module located in front of the material loading and unloading temporary storage area, and the synchronous lifting module is provided with upper and lower material positions located above and a transition position located below. The upper and lower material positions are located in front of the material discharge position and are flush with the material discharge position. The material discharge position is provided with a fourth conveying mechanism. When there is no carrier at the upper and lower material positions, the fourth conveying mechanism conveys the carrier at the material discharge position to the upper and lower material positions.

[0011] In a preferred embodiment, the composite heating furnace includes a lifting and lowering loading and unloading mechanism, which includes the material loading and unloading temporary storage area, the synchronous lifting module and a manipulator, and the manipulator is used to grab the heated product in the carrier at the loading and unloading position and place the unheated product on the empty carrier.

[0012] In a preferred embodiment, the transition position is located in front of the feed position and is flush with the feed position. The transition position is provided with a fifth conveying mechanism. The synchronous lifting module lowers the carrier carrying the unheated product at the upper and lower material positions to the transition position, and then conveys it to the feed position via the fifth conveying mechanism.

[0013] In a preferred embodiment, the first to fifth conveying mechanisms are roller transmission mechanisms or roller transmission mechanisms, and the translation mechanism is a mechanical grasping mechanism or a horizontal pushing mechanism, so that the carrier can be quickly transferred between two areas or workstations.

[0014] In a preferred embodiment, the composite heating furnace includes an automation control module connected to the constant temperature furnace, and the automation control module controls the heating furnace, the constant temperature furnace and the lifting and loading mechanism to work together to complete an automated production cycle.

[0015] In a preferred embodiment, the lifting mechanism and the lowering mechanism both include two chain conveying mechanisms arranged opposite to each other, and the chain conveying mechanism is provided with at least two transmission wheels arranged up and down, a chain mounted on the transmission wheel, and several support plates located on the outside of the chain. The transmission wheel drives the chain to perform a cyclic lifting / lowering movement, and the support plates are equidistantly arranged on the chain, and the support plates arranged opposite to each other in the two chain conveying mechanisms form a support position to carry the carrier.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the carrier carries a product and enters the heating zone from the feed port, the product is heated to a predetermined heating temperature within a predetermined heating time, the bottom automatic door opens and the first conveying mechanism conveys the carrier to the constant temperature zone, the lifting mechanism grabs the carrier and lifts the carrier from the bottom to the top within a predetermined insulation time, at which time the top automatic door opens, the translation mechanism transfers the carrier at the top of the constant temperature zone to the top of the cooling zone, the descending mechanism drives the carrier to descend from the top to the bottom within a predetermined cooling time, at which time the product in the carrier drops to a predetermined cooling temperature, and the second conveying mechanism then flows the carrier out of the discharge port. The composite heating furnace realizes seamless flow of the carrier in the heating, insulation and cooling zones through the coordination of the automatic door, the conveying mechanism and the chain conveying mechanism, thereby achieving a multi-system linkage design; at the same time, the cyclic lifting / lowering design of the carrier in the insulation and cooling zones reduces energy waste, thereby improving energy utilization and achieving high efficiency and energy saving; and the composite heating furnace realizes fully automated operation without manual intervention, thereby reducing labor intensity and safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of a composite heating furnace in a preferred embodiment of the present invention.

[0018] Figure 2 yes Figure 1 A cross-sectional view of a combined heating furnace is shown.

[0019] Figure 3 yes Figure 2 The front view of the lifting mechanism in the composite heating furnace is shown.

[0020] Figure 4 yes Figure 1 The action flow chart of the composite heating furnace is shown. DETAILED DESCRIPTION

[0021] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0022] In the description of the embodiments of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "several" means two or more, unless otherwise specifically defined.

[0024] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0025] See also Figures 1 to 4 As shown, a preferred embodiment of the present invention discloses a composite heating furnace 100, which is fully automated and requires no human intervention, reducing labor intensity and safety hazards. The composite heating furnace 100 includes a holding furnace 101, a heating furnace 102, and a lifting and lowering mechanism 103. The heating furnace 102 and the holding furnace 101 are provided with a high-temperature insulation layer to provide fire and aging resistance. This prevents the product 61 from coming into contact with external cold air during the strengthening process, ensuring uniform heating and achieving a fully enclosed structure, thereby preventing undesirable conditions such as cracking and deformation.

[0026] The heating furnace 102 is located below the insulation furnace 101. The heating furnace 102 has a heating zone 10 for heating the carrier 60 and the product 61 located therein. The heating zone 10 is provided with a feed port 11 for the carrier 60 to enter and a first conveying mechanism located within the heating zone 10. The carrier 60 carries the product 61 into the heating zone 10 from the feed port 11, and the product 61 can be heated to a predetermined heating temperature T1 within a predetermined heating time t1.

[0027] The holding furnace 101 has a constant temperature zone 20 for continuously keeping the carrier 60 and the product 61 warm, and a cooling zone 30 for gradually cooling the carrier 60 and the product 61. The cooling zone 30 is located above the heating zone 10, and both are adjacent to the front of the constant temperature zone 20. Figure 4 As shown, in the operation flow of the composite heating furnace 100 , the heating zone 10 is located upstream, the constant temperature zone 20 is located midstream, and the cooling zone 30 is located downstream.

[0028] The composite heating furnace 100 includes a bottom automatic door between the heating zone 10 and the constant temperature zone 20, and a top automatic door between the constant temperature zone 20 and the cooling zone 30. Specifically, the heating zone 10, constant temperature zone 20, and cooling zone 30 are independent chambers. Specifically, the heating furnace 102 and the holding furnace 101 are separated by a bottom automatic door, and when no carrier 60 is being transported between them, the bottom automatic door remains closed to prevent heat transfer between them. Simultaneously, the holding furnace 101 is separated and sealed by a top automatic door between the constant temperature zone 20 and the cooling zone 30 to prevent heat transfer between them.

[0029] When the temperature of the carrier 60 and product 61 in the heating zone 10 reaches the target value (predetermined heating temperature T1), the bottom automatic door opens and the first conveying mechanism conveys the carrier 60 into the constant temperature zone 20. Simultaneously, the bottom automatic door closes. The constant temperature zone 20 is equipped with a lifting mechanism 21 for cyclic lifting. The lifting mechanism 21 supports the cyclic lifting of multiple carriers 60. The lifting mechanism 21 grabs the carrier 60 conveyed into the constant temperature zone 20 and lifts the carrier 60 from the bottom of the constant temperature zone 20 to the top of the constant temperature zone 20 within a predetermined holding time t2. The predetermined constant temperature of the constant temperature air in the constant temperature zone 20 is T2, and T2 = T1.

[0030] The holding furnace 101 has a translation mechanism located between the constant temperature zone 20 and the cooling zone 30. The translation mechanism is a mechanical grabbing mechanism or a horizontal pushing mechanism that quickly transfers the carrier 60 from the top of the constant temperature zone 20 to the top of the cooling zone 30, thereby reducing heat exchange between the constant temperature zone 20 and the cooling zone 30. When the carrier 60 is lifted to the top of the constant temperature zone 20, the automatic top door opens, and the translation mechanism quickly transfers the carrier 60 from the top of the constant temperature zone 20 to the top of the cooling zone 30. Simultaneously, the automatic top door closes.

[0031] The cooling zone 30 is provided with an outlet 31 for the carriers 60 to flow out, a second conveying mechanism, and a descending mechanism 32 for cyclical descent. The descending mechanism 32 supports the cyclic descent of multiple carriers 60, thereby achieving progressive cooling of the carriers 60. When the carriers 60 are transferred to the top of the cooling zone 30, the descending mechanism 32 drives the carriers 60 to descend from the top of the cooling zone 30 to the bottom of the cooling zone 30 within a predetermined cooling time t3. At this time, the temperature of the products 61 in the carriers 60 drops to the predetermined cooling temperature T3. Subsequently, the second conveying mechanism carries the carriers 60 and the products 61 out of the holding furnace 101 from the outlet 31. The present invention realizes the seamless flow of the carriers 60 within the heating, holding, and cooling zones through the coordination of the automatic door, conveying mechanism, lifting mechanism, and descending mechanism, thereby achieving a multi-system linkage design.

[0032] Furthermore, the heating furnace 102 is equipped with an automatic feeding door corresponding to the feeding port 11. The heating furnace 102 realizes a single entry of the carrier 60 through the automatic feeding door and the third conveying mechanism. The constant temperature furnace 101 is equipped with an automatic discharging door corresponding to the discharging port 31, and the automatic discharging door is located above the automatic feeding door. The constant temperature furnace 102 is also equipped with a sealed door 33 adjacent to the automatic discharging door and a display window located on the sealed door 33. The sealed door 33 facilitates subsequent disassembly, assembly, maintenance, and other operations of the internal components of the constant temperature furnace 101. The display window is provided to facilitate observation of the internal conditions of the constant temperature furnace 101.

[0033] The lifting and lowering loading and unloading mechanism 103 includes a material loading and unloading temporary storage area 40, a synchronous lifting module 50 and a robot; specifically, the lifting and lowering loading and unloading mechanism 103 is provided with a frame supporting the material loading and unloading temporary storage area 40 and the synchronous lifting module 50 and four fixed supporting feet and four movable supporting feet located at the bottom of the frame. The bottom of the fixed supporting feet is flat, and the bottom of the movable supporting feet is provided with wheels, and the movable supporting feet can be lifted up and down. The setting of the two sets of supporting feet facilitates the movement and fixation of the lifting and unloading mechanism 103.

[0034] The loading and unloading temporary storage area 40 is located in front of the heating furnace 102 and is equipped with a feed position 41 at the bottom and a discharge position 42 at the top. The feed position 41 is located in front of the feed inlet 11 and is equipped with a third conveyor mechanism. When the automatic feed door is opened, the third conveyor mechanism drives the carrier 60 from the feed inlet 11 into the heating zone 10. The discharge position 42 is located in front of the discharge port 31. When the automatic discharge door is opened, the second conveyor mechanism in the cooling zone 30 drives the carrier 60 out of the discharge port 31 to the discharge position 42.

[0035] The synchronous lifting module 50 is located in front of the material loading and unloading temporary storage area 40 and is equipped with an upper and lower material position 51 above and a transition position 52 below. The synchronous lifting module 50 can circulate back and forth between the upper and lower material position 51 and the transition position 52. The upper and lower material position 51 is located in front of and flush with the discharge position 42. The discharge position 42 is equipped with a fourth conveyor mechanism. When there is no carrier 60 at the upper and lower material position 51, the fourth conveyor mechanism transfers the carrier 60 at the discharge position 42 to the upper and lower material position 51. The product 61 in the carrier 60 at the upper and lower material position 51 is in a heated state. At this time, the robot is used to grab the heated product 61 in the carrier 60 at the upper and lower material position 51 and place the unheated product 61 on the empty carrier 60.

[0036] The transition position 52 is located in front of and flush with the feed position 41. The transition position 52 is equipped with a fifth conveyor mechanism. The synchronous lifting module 50 lowers the carrier 60 carrying the unheated product 61 at the loading and unloading position 51 to the transition position 52, then transfers it to the feed position 41 via the fifth conveyor mechanism. Then, the synchronous lifting module 50 returns to the loading and unloading position 51 to wait. The lifting loading and unloading mechanism 103 achieves seamless connection of loading and unloading of products 61 and vertical lifting of the carrier 60; it also realizes the automatic recycling and reuse of empty carriers 60, which not only reduces the number of carriers and reduces costs, but also replaces manual collection and return, improving the efficiency of carrier return.

[0037] In this embodiment, the lifting mechanism 21 and the lowering mechanism 32 each include two chain conveyor mechanisms 70 arranged opposite each other. The chain conveyor mechanisms 70 are provided with at least two transmission wheels 71 arranged vertically, a chain 72 mounted on the transmission wheels 71, and several support plates 73 located outside the chain 72. The transmission wheels 71 drive the chain 72 to perform a cyclic lifting / lowering motion. The support plates 73 are equidistantly arranged on the chain 72, and the support plates 73 arranged opposite each other in the two chain conveyor mechanisms 70 form a support position to support the carrier 60. The cross-section of the support plates 73 is L-shaped, thereby facilitating the installation and clamping of the carrier 60. The multiple carriers 60 are cyclically lifted / lowered between the two chain conveyor mechanisms 70 for cyclic insulation / progressive cooling, thereby reducing energy waste, improving energy utilization, and achieving energy conservation and high efficiency.

[0038] The first through fifth conveyor mechanisms are roller or shaft transmission mechanisms, enabling rapid transfer of the carrier 60 between two areas or workstations. Furthermore, each of the aforementioned conveyor mechanisms, translation mechanisms, and chain conveyor mechanisms operates independently, with continuously adjustable speeds, facilitating separate control of material infeed and outfeed speeds.

[0039] The composite heating furnace 100 also includes an automation control module 104 connected to the constant temperature furnace 101. The automation control module 104 is a PLC control system and monitors and adjusts the temperature, time and action process of each area in real time to control the coordinated operation of the heating furnace 102, the constant temperature furnace 101 and the lifting and loading mechanism 103, thereby completing the automated production cycle.

[0040] The operation flow of the composite heating furnace 100 is as follows:

[0041] 1. The robot takes out the cooled product 61 at the upper and lower material positions 51 and places the new product 61 onto the carrier 60;

[0042] 2. The synchronous lifting module 50 drives the carrier 60 down to the transition position 52 and transfers the carrier 60 to the feeding position 41 via the fifth conveying mechanism. At the same time, the synchronous lifting module 50 returns to the upper and lower material positions 51 to wait.

[0043] 3. The automatic feeding door is opened, and the carrier 60 at the feeding position 41 is fed into the heating zone 10 via the third conveying mechanism, and then the automatic feeding door is closed;

[0044] 4. After the product 61 is heated by the infrared lamp to a predetermined heating time t1 and a predetermined heating temperature T1 (i.e., the product 61 remains in the heating zone 10 for the predetermined heating time t1 and the temperature rises to the target value), the bottom automatic door opens, and the carrier 60 is conveyed to the bottom of the constant temperature zone 20 via the first conveying mechanism, and then the bottom automatic door closes;

[0045] 5. The lifting mechanism 21 in the constant temperature zone 20 cyclically lifts the carrier 60. After the holding time reaches the predetermined holding time t2, the top automatic door opens, and the carrier 60 is quickly transported to the top of the cooling zone 10 via the translation mechanism. Then, the top automatic door closes.

[0046] 6. The descending mechanism 32 in the cooling zone 30 causes the carrier 60 to descend in a cycle, and after gradually cooling to the preset cooling temperature T3 within the preset cooling time t3, the automatic discharge door opens, and the carrier 60 is conveyed to the discharge position 42 via the second conveying mechanism, and then the automatic discharge door closes;

[0047] 7. The carrier 60 at the discharge position 42 is transferred to the loading and unloading position 51 via the fourth transfer mechanism, waiting for the robot to perform loading and unloading operations.

[0048] In the present invention, the carrier 60 carrying a product 61 enters the heating zone 10 from the feed port 11. The product 61 is heated to a predetermined heating temperature T1 within a predetermined heating time t1. The bottom automatic door opens and the first conveyor mechanism conveys the carrier 60 to the constant temperature zone 20. The lifting mechanism 21 grabs the carrier 60 and lifts the carrier 60 from the bottom to the top within a predetermined insulation time t2. At this time, the top automatic door opens, and the translation mechanism transfers the carrier 60 at the top of the constant temperature zone 20 to the top of the cooling zone 30. The descending mechanism 32 drives the carrier 60 to descend from the top to the bottom within a predetermined cooling time t3. At this time, the product 61 in the carrier 60 drops to a predetermined cooling temperature T3. The second conveyor mechanism then discharges the carrier 60 from the discharge port 31. The composite heating furnace 100 realizes seamless flow of the carrier 60 in the heating, insulation, and cooling zones through the coordination of the automatic door, conveyor mechanism, and chain conveyor mechanism, thereby achieving a multi-system linkage design. At the same time, the cyclic lifting / lowering design of the carrier 60 in the insulation and cooling area reduces energy waste, thereby improving energy utilization and achieving high efficiency and energy saving; and the composite heating furnace 100 realizes fully automatic operation without manual intervention, reducing labor intensity and safety hazards.

[0049] In summary, the above are merely preferred embodiments of the present invention and should not be used to limit the scope of the present invention. That is, any simple equivalent changes and modifications made according to the claims and description of the present invention should still fall within the scope of the patent of the present invention.

Claims

1. A composite heating furnace comprising an upstream heating zone, a midstream constant temperature zone, and a downstream cooling zone; the heating zone having an inlet for a carrier to enter and a first conveyor mechanism; the constant temperature zone having an elevator mechanism for cyclical lifting; and the cooling zone having an outlet for the carrier to exit, a second conveyor mechanism, and a descending mechanism for cyclical descending; characterized in that: The cooling zone is located above the heating zone, and both are adjacent to the front of the constant temperature zone. The composite heating furnace includes a bottom automatic door located between the heating zone and the constant temperature zone and a top automatic door and a translation mechanism located between the constant temperature zone and the cooling zone; the carrier carries a product from the feed port into the heating zone, and the product is heated to a predetermined heating temperature within a predetermined heating time. The bottom automatic door opens and the first conveying mechanism conveys the carrier to the constant temperature zone. The lifting mechanism grabs the carrier and lifts the carrier from the bottom to the top within a predetermined insulation time. At this time, the top automatic door opens, and the translation mechanism transfers the carrier at the top of the constant temperature zone to the top of the cooling zone. The descending mechanism drives the carrier to descend from the top to the bottom within a predetermined cooling time. At this time, the product in the carrier drops to a predetermined cooling temperature, and then the second conveying mechanism causes the carrier to flow out from the discharge port.

2. The composite heating furnace according to claim 1, wherein: The composite heating furnace includes a heating furnace and a heat preservation furnace. The heating furnace is located below the heat preservation furnace. The heating furnace has the heating zone. The heat preservation furnace has the constant temperature zone and the cooling zone. The constant temperature zone and the cooling zone are separated and sealed by the top automatic door.

3. The composite heating furnace according to claim 2, characterized in that: The heating furnace is provided with an automatic feeding door corresponding to the feeding port, and the constant temperature furnace is provided with an automatic discharging door corresponding to the discharging port, and the automatic discharging door is located above the automatic feeding door.

4. The composite heating furnace according to claim 3, characterized in that: The composite heating furnace includes a temporary storage area for feeding and discharging materials located in front of the heating furnace. The temporary storage area for feeding and discharging materials is provided with a feeding position located below and a discharging position located above. The feeding position is located in front of the feeding port and is provided with a third conveying mechanism. When the automatic feeding door is opened, the third conveying mechanism drives the carrier from the feeding port into the heating zone; the discharging position is located in front of the discharging port. When the automatic discharging door is opened, the second conveying mechanism in the cooling zone drives the carrier to flow out through the discharging port to the discharging position.

5. The composite heating furnace according to claim 4, characterized in that: The composite heating furnace includes a synchronous lifting module located in front of the material loading and unloading temporary storage area. The synchronous lifting module is provided with upper and lower material positions located above and a transition position located below. The upper and lower material positions are located in front of the material discharge position and are flush with the material discharge position. The material discharge position is provided with a fourth conveying mechanism. When there is no carrier at the upper and lower material positions, the fourth conveying mechanism conveys the carrier at the material discharge position to the upper and lower material positions.

6. The composite heating furnace according to claim 5, characterized in that: The composite heating furnace includes a lifting and lowering loading and unloading mechanism, which includes the material loading and unloading temporary storage area, the synchronous lifting module and a robot. The robot is used to grab the heated product in the carrier at the loading and unloading position and place the unheated product on the empty carrier.

7. The composite heating furnace according to claim 6, characterized in that: The transition position is located in front of the feed position and flush with the feed position. The transition position is provided with a fifth conveying mechanism. The synchronous lifting module lowers the carrier carrying the unheated product at the upper and lower material positions to the transition position, and then conveys it to the feed position via the fifth conveying mechanism.

8. The composite heating furnace according to claim 7, characterized in that: The first to fifth conveying mechanisms are roller transmission mechanisms or roller transmission mechanisms, and the translation mechanism is a mechanical grasping mechanism or a horizontal pushing mechanism, so that the carrier can be quickly transferred between two areas or workstations.

9. The composite heating furnace according to claim 7, characterized in that: The composite heating furnace includes an automation control module connected to the constant temperature furnace, and the automation control module controls the heating furnace, the constant temperature furnace and the lifting and loading mechanism to work together to complete an automated production cycle.

10. The composite heating furnace according to claim 1, characterized in that: The lifting mechanism and the lowering mechanism both include two chain conveying mechanisms arranged opposite to each other, each of the chain conveying mechanisms being provided with at least two transmission wheels arranged vertically, a chain sleeved on the transmission wheels, and a plurality of support plates located on the outside of the chain. The transmission wheels drive the chain to perform a cyclic lifting / lowering motion, the support plates are equidistantly arranged on the chain, and the support plates arranged opposite to each other in the two chain conveying mechanisms form a support position to carry the carrier.

Images