A hot air circulation structure

Abstract

The application belongs to the technical field of high-temperature furnace equipment, and discloses a hot air circulation structure, which comprises an outer shell, a wind channel is arranged around the inner wall and on one side of the top of the outer shell, a hot air circulation servo opening and closing mechanism, a fan and an exhaust hole are arranged on the outer shell; the hot air circulation servo opening and closing mechanism comprises a lifting lever, a lifting servo motor and two hot cycle switch plates which are stacked and provided with staggered square holes; the lifting servo motor drives the lifting lever to drive the hot cycle switch plates to slide to adjust the overlapping area of the holes; the utility model realizes accurate regulation and control of hot air flow in the heating stage of the high-temperature furnace, can stably match the preset temperature rising curve and avoid temperature fluctuation; meanwhile, effective isolation and rapid exhaust of cold and hot air flow in the cooling stage are realized, the cooling efficiency is greatly improved, the defects of insufficient temperature control precision and long cooling time of the traditional technology are solved, the product quality is stabilized, the utilization rate of the high-temperature furnace equipment is improved, and the utility model is suitable for the scenes of precise temperature control such as material heat treatment and ceramic sintering.

Description

Technical Field

[0001] This application relates to the field of high-temperature furnace equipment technology, and more specifically, to a hot air circulation structure. Background Technology

[0002] High-temperature furnaces, as core equipment in industrial production for material heat treatment, metal smelting, and ceramic sintering, require precise control and uniform temperature distribution within the furnace to ensure the stability of processed product quality. High-temperature furnace hot air circulation technology refers to a system that uses specific airflow channels and power components to create an orderly circulation of hot air generated during furnace heating. During high-temperature furnace operation, relying solely on direct radiation heating from heating elements can easily lead to excessive temperature differences between different areas of the furnace, resulting in localized overheating or uneven heating. For example, in the quenching process of metal parts, uneven temperature can lead to inconsistent hardness and even cracks; in ceramic firing, temperature deviations can cause product deformation or uneven color. Therefore, hot air circulation technology is needed to dissipate heat through airflow circulation, making the furnace temperature more uniform. Simultaneously, during the heating phase, the hot air circulation rate needs to be controlled to match the preset heating curve, and during the cooling phase, the airflow needs to be guided to quickly remove heat, meeting the temperature change rhythm requirements of different processes. This makes hot air circulation technology a key support for ensuring the processing accuracy and efficiency of high-temperature furnaces.

[0003] Therefore, this application proposes a hot air circulation structure to solve the above-mentioned problems. Utility Model Content

[0004] To address the aforementioned problems, this application provides a hot air circulation structure.

[0005] The hot air circulation structure provided in this application adopts the following technical solution:

[0006] The system includes a housing, with air ducts on all four sides of the inner wall and another air duct on one side of the top of the housing. Its distinguishing feature is that it also includes a hot air circulation servo opening and closing mechanism.

[0007] A hot air circulation servo opening and closing mechanism is provided at one end of the inner wall of the air duct.

[0008] Furthermore, the hot air circulation servo opening and closing mechanism includes a lifting lever, a lifting servo motor, and a hot air circulation switch plate. The lifting lever is provided at one end of the inner wall of the top of the air duct, and the lifting servo motor is fixedly installed on the top of the housing. The output end of the lifting servo motor is fixedly connected to a connecting rod at one end of the lifting lever. Two overlapping hot air circulation switch plates are slidably connected to the inner wall of the air duct near the top. The connecting rod at the end of the lifting lever away from the lifting servo motor is movably connected to one of the hot air circulation switch plates.

[0009] Through the above technical solution, the servo motor is used as the power source, and the lifting lever is driven to move through the connecting rod. The lifting lever converts the rotational motion of the motor into the sliding motion of the hot air circulation switch plate, realizing the efficient transmission of power and the conversion of motion form. The two overlapping hot air circulation switch plates slide in the air duct, and the size of the airflow channel can be adjusted by changing the relative position, providing a structural basis for precise control of hot air flow.

[0010] Furthermore, the outer walls of the two thermal cycle switch plates are provided with multiple square holes that are equidistantly distributed in a rectangular shape, and the two sets of square holes are staggered.

[0011] Through the above technical solution, the staggered square holes allow the overlapping area of ​​the holes to change flexibly when the two heat circulation switch plates slide relative to each other. The larger the overlapping area, the larger the area through which the airflow passes, and vice versa. When they are completely staggered, the airflow can be blocked, thereby achieving precise regulation of the airflow in the duct and providing a direct means to control the rate of temperature rise and fall.

[0012] Furthermore, a fan is fixedly installed on the back of the casing, and the output end of the fan extends to one end of the inner wall of the air duct.

[0013] Through the above technical solution, the fan provides power for airflow. During the heating stage, it can send hot air into the air duct to promote the circulation of hot air in the air duct. During the cooling stage, it can draw in cold air from the outside and deliver it to the air duct to provide a cold source for the cooling process. Through power drive, it ensures that the airflow flows in the required direction and improves the efficiency of temperature control.

[0014] Furthermore, an exhaust port is provided at the top of the outer casing near the fan end, and the exhaust port extends to the top end of the inner wall of the air duct.

[0015] Through the above technical solution, when the exhaust port is closed during the heating stage, it can prevent hot air from leaking out, ensure that the hot air circulates efficiently in the air duct, and reduce heat loss; when it is opened during the cooling stage, it can discharge the hot air that has absorbed heat in time, forming a one-way channel for the entry of cold air and the discharge of hot air, accelerating the cooling process and improving the working efficiency of the equipment.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] (1) This device uses a servo motor to drive a lifting lever, which in turn links two thermal circulation switch plates to adjust the overlapping area of ​​the square hole, thereby achieving precise control of the hot air flow in the air duct. The system can continuously fine-tune the position of the switch plates based on real-time temperature feedback to ensure that the temperature rises strictly according to the preset rate, thus avoiding damage to the product caused by temperature fluctuations. It is especially suitable for heat treatment processes of materials with high requirements for heating accuracy.

[0018] (2) During the cooling stage, the device completely closes the thermal circulation channel through the thermal circulation servo board and opens the exhaust port at the same time, so that the cold air drawn in by the fan flows through the product in one direction and is directly discharged, forming an efficient "cold air in-heat absorption-exhaust" path. This design avoids the mixing of cold and hot air, allowing the cold air to continuously carry away heat, greatly shortening the cooling time and improving the equipment utilization rate. Compared with the traditional method, it can save cooling time and is especially suitable for mass production scenarios. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this application;

[0020] Figure 2 This is a schematic diagram of the back fan of the device in this application;

[0021] Figure 3 This is a schematic diagram of the internal structure of this application;

[0022] Figure 4 This is a schematic diagram of the hot air circulation servo opening and closing mechanism of this application.

[0023] The following are the labels in the diagram: 1. Outer casing; 2. Air duct; 3. Exhaust vent; 4. Lifting lever; 5. Lifting servo motor; 6. Heat circulation switch plate; 7. Square hole; 8. Fan. Detailed Implementation

[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] Example:

[0028] The following is in conjunction with the appendix Figure 1 -2 provides further detailed description of this application.

[0029] This application discloses a hot air circulation structure, including a shell 1, with air ducts 2 arranged around the inner wall of the shell 1 and on one side of the top of the shell 1. The structure is characterized by further including a hot air circulation servo opening and closing mechanism.

[0030] One end of the inner wall of the air duct 2 is equipped with a hot air circulation servo opening and closing mechanism.

[0031] See Figure 2 and Figure 3 The hot air circulation servo opening and closing mechanism includes a lifting lever 4, a lifting servo motor 5, and a hot air circulation switch plate 6. The lifting lever 4 is provided at one end of the inner wall of the top of the air duct 2. The lifting servo motor 5 is fixedly installed on the top of the housing 1. The output end of the lifting servo motor 5 is fixedly connected to a connecting rod at one end of the lifting lever 4. Two overlapping hot air circulation switch plates 6 are slidably connected to the inner wall of the air duct 2 near the top. The connecting rod at the end of the lifting lever 4 away from the lifting servo motor 5 is movably connected to one of the hot air circulation switch plates 6.

[0032] See Figure 3 and Figure 4 The outer walls of the two thermal circulation switch plates 6 are respectively provided with multiple square holes 7 distributed in a rectangular shape at equal intervals, and the two sets of square holes 7 are staggered.

[0033] See Figure 2 A fan 8 is fixedly installed on the back of the outer casing 1, and the output end of the fan 8 extends to one end of the inner wall of the air duct 2.

[0034] See Figure 2 An exhaust port 3 is provided at the top of the outer casing 1 near the fan 8, and the exhaust port 3 extends to the top of the inner wall of the air duct 2.

[0035] The following is a detailed description of each component of this application:

[0036] Outer shell 1: As the main structure of the high-temperature furnace, it provides the installation base and protection for the internal components. The air ducts 2 set around its inner wall form a hot air circulation path, while the air duct 2 on the top side together with other parts form a complete airflow channel.

[0037] Duct 2: This is a channel for the flow of hot and cold air, providing a path for the circulation of hot air and the flow of cooling air, ensuring that the airflow can circulate or be discharged in an orderly manner inside the high-temperature furnace.

[0038] Exhaust port 3: It is located at the top of the outer casing 1 near the fan 8 and extends to the top of the inner wall of the air duct 2. During the heating stage, the valve can be closed to prevent hot air from leaking out and ensure the efficiency of hot air circulation. During the cooling stage, the valve can be opened to allow the air that has absorbed heat to be discharged, which helps to cool down.

[0039] Lifting lever 4: Installed on one end of the inner wall of the top of the air duct 2. One end is fixedly connected to the connecting rod of the output end of the lifting servo motor 5, and the other end is connected to the thermal circulation switch plate 6 through the movable connecting rod. It plays the role of transmitting power and converting the rotational motion of the lifting servo motor 5 into the sliding motion of the thermal circulation switch plate 6.

[0040] Lifting servo motor 5: It is fixedly installed on the top of the housing 1, and its output end is fixedly connected to one end of the lifting lever 4. It is the power source of the hot air circulation servo opening and closing mechanism. It can operate according to the system control signal, and drive the lifting lever 4 to move, thereby controlling the position of the hot air circulation switch plate 6.

[0041] The heat circulation switch plate 6 consists of two plates that are stacked and mounted on the inner wall of the air duct 2 near the top and are slidably connected to it. The outer wall of each plate has multiple staggered square holes 7. By sliding the switch plates to change the overlapping area of ​​the square holes 7, the size of the airflow channel in the air duct 2 can be adjusted, thereby controlling the flow rate and circulation of hot air.

[0042] Square holes 7: These are equidistantly distributed in a rectangular pattern on the outer wall of the heat circulation switch plate 6, with two sets of holes intersecting each other. When the two heat circulation switch plates 6 slide relative to each other, the overlapping area of ​​the holes changes. A larger overlapping area results in a larger airflow channel, while a smaller overlapping area results in a smaller airflow channel. When they are completely intersected, the airflow is blocked, thereby controlling the airflow rate within the duct.

[0043] Fan 8: Fixedly installed on the back of the outer casing 1, with its output end extending to the top of the inner wall of the air duct 2. After starting during the heating stage, it delivers hot air into the air duct 2 to promote hot air circulation; during the cooling stage, it draws in cold air from the outside and sends it into the air duct 2 to provide a cold source for the cooling process.

[0044] The implementation principle of a hot air circulation structure in this application embodiment is as follows: A preset heating parameter is used to link the lifting servo motor 5 and the lifting lever 4, activating the switch plate adjustment mechanism. When the high-temperature furnace starts its heating program, the system sends a control signal to the lifting servo motor 5, which is fixedly installed on the outer wall of one end of the outer casing 1, according to a preset heating rate of 100 degrees Celsius per hour. After receiving the signal, the output end of the lifting servo motor 5 starts to operate, and through a fixed connecting rod, it drives the lifting lever 4, which is installed on the inner wall of the top of the air duct 2, to move synchronously. The lifting lever 4, with its connection point to the air duct 2 as a fulcrum, moves upward or downward at the end away from the lifting servo motor 5, thereby triggering the subsequent adjustment action of the switch plate. This lays the foundation for controlling the hot air flow rate within the air duct 2. The end of the lifting lever 4 away from the lifting servo motor 5 is connected to one of the hot air circulation switch plates 6, which is slidably connected to the inner wall of the air duct 2 near the top, through a movable connecting rod. When the lifting lever 4 is displaced, it directly drives the heat circulation switch plate 6 to move along the sliding direction on the inner wall of the air duct 2. Since the two heat circulation switch plates 6 are installed in a stacked state, and their outer walls are respectively provided with multiple square holes 7 distributed in a rectangular shape at equal intervals, and the two sets of square holes 7 are initially staggered, when one of the heat circulation switch plates 6 moves under the action of the lifting lever 4, the overlapping area of ​​the square holes 7 on the two switch plates will change. When the overlapping area increases, the channel area through which hot air can pass in the air duct 2 increases; when the overlapping area decreases, the channel area through which hot air can pass decreases. Through this linkage process, precise control of the size of the hot air flow cross section in the air duct 2 is achieved. The change of the hot air flow cross section directly affects the flow rate and flow volume of the hot air in the air duct 2. While the heat circulation switch plate 6 adjusts the conduction area of ​​the square hole 7, the fan 8 installed on the top of the outer shell 1 is started, and its bottom output end delivers hot air to the top end of the inner wall of the air duct 2 (the hot air comes from the heating components of the high temperature furnace, which is not mentioned in the structural designation, but its flow depends on the cooperation between the air duct 2 and the fan 8). At this time, the staff had already closed the exhaust port 3 valve at the top of the air duct 2 in advance (the exhaust port 3 is located at the top of the outer shell 1 near the fan 8 and extends to the top of the inner wall of the air duct 2; closing the valve can prevent hot air from leaking out). The hot air can only circulate within the air duct 2. When the conduction area of ​​the square hole 7 is large, the flow resistance of the hot air in the air duct 2 is small and the flow rate is large. The heat exchange efficiency between the hot air and the product to be heated inside the outer shell 1 is high, and the temperature rise rate is faster. When the conduction area of ​​the square hole 7 is small, the flow resistance of the hot air is large and the flow rate is small. The heat exchange efficiency is reduced, and the temperature rise rate is slowed down.The system monitors the temperature inside the high-temperature furnace in real time and feeds it back to the lifting servo motor 5. It continuously fine-tunes the position of the heat circulation switch plate 6 to keep the temperature rise rate stable at a preset 100 degrees per hour, thus achieving precise control of the heating rate and avoiding damage to the product caused by sudden temperature rises. When the high-temperature furnace completes the heating process and enters the equipment cooling stage, the system sends a cooling stage control signal to the lifting servo motor 5. The lifting servo motor 5 rotates in reverse and drives the lifting lever 4 to move again through the connecting rod. The lifting lever 4 then drives the heat circulation switch plate 6 to move, so that the square holes 7 on the two overlapping heat circulation switch plates 6 are completely intersected. At this time, the two sets of square holes 7 have no overlapping area, and the heat circulation switch plate 6 completely blocks the hot air circulation channel in the air duct 2, preventing the high-temperature hot air from continuing to stagnate in the air duct 2 and creating conditions for the entry of cold air. After the heat circulation switch plate 6 closes the heat circulation channel, the fan 8 adjusts its working mode and no longer delivers hot air. Instead, it draws in outside cold air from the inlet. The cold air enters the top end of the inner wall of the air duct 2 through the bottom output end of the fan 8. Simultaneously, the staff opens the valve of exhaust port 3. Since the thermal circulation channel has been blocked, the cold air cannot participate in the hot air circulation and can only flow directly through the inside of the outer casing 1 to exchange heat with the product to be cooled. The hot air, after absorbing the heat from the product, is directly discharged to the outside of the outer casing 1 through the opened exhaust port 3, forming a one-way flow path of "cold air in - heat absorption - hot air out". Through this linkage process, outside cold air continuously enters and carries away heat, quickly reducing the temperature of the product and the equipment itself inside the outer casing 1, ultimately achieving a highly efficient cooling effect, shortening the equipment cooling time, and improving production efficiency.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hot air circulation structure, comprising a shell (1), wherein air ducts (2) are provided around the inner wall of the shell (1), and air ducts (2) are provided on one side of the top of the shell (1), characterized in that, It also includes a hot air circulation servo opening and closing mechanism: The inner wall of the air duct (2) is provided with a hot air circulation servo opening and closing mechanism at one end.

2. The hot air circulation structure according to claim 1, characterized in that: The hot air circulation servo opening and closing mechanism includes a lifting lever (4), a lifting servo motor (5), and a hot air circulation switch plate (6). The lifting lever (4) is provided at one end of the top inner wall of the air duct (2). The lifting servo motor (5) is fixedly installed on the top of the outer shell (1). The output end of the lifting servo motor (5) is fixedly connected to a connecting rod at one end of the lifting lever (4). Two overlapping hot air circulation switch plates (6) are slidably connected to the inner wall of the air duct (2) near the top. The connecting rod at the end of the lifting lever (4) away from the lifting servo motor (5) is movably connected to one of the hot air circulation switch plates (6).

3. The hot air circulation structure according to claim 2, characterized in that: The outer walls of the two thermal cycle switch plates (6) are respectively provided with a plurality of square holes (7) distributed in a rectangular shape at equal intervals, and the two sets of square holes (7) are staggered.

4. A hot air circulation structure according to claim 1, characterized in that: A fan (8) is fixedly installed on the back of the outer shell (1), and the output end of the fan (8) extends to one end of the inner wall of the air duct (2).

5. A hot air circulation structure according to claim 4, characterized in that: The top of the outer casing (1) near the fan (8) has an exhaust hole (3) that extends to the top of the inner wall of the air duct (2).

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