A double-fan circulation structure autoclave

Abstract

A kind of double-fan circulation structure autoclave, including autoclave main body and being set in the opening of autoclave main body front and rear two ends openable and closable tank door, the inside support of autoclave main body has the hole's air duct device with the diameter less than autoclave main body, annular cavity is formed between air duct device and autoclave main body inner side wall, annular cavity is fixed with the uniformly arranged fin heater, the two ends of air duct device are fixed with the gradually narrowing conical air guide cone outward, the tank door of front and rear two ends is fixed with front fan set and rear fan set, and the front impeller driven by front fan set is located in the opening of front conical air guide cone outside, the rear impeller driven by rear fan set is located in the tip of rear conical air guide cone outside.The double-fan of the utility model uses collaborative working mode to make air circulation efficiency greatly improve, energy consumption is more economical, temperature uniformity is accurately controllable, operating stability and reliability are stronger, more extensive, improve the comprehensive utilization value of equipment.

Description

Technical Field

[0001] This utility model relates to the field of autoclave technology, specifically an autoclave with a dual-fan circulation structure. Background Technology

[0002] Although current composite material hot pressing equipment, i.e., autoclaves, are equipped with internal fans, the internal heat is still uneven and uniform. If the fan parameters are not adjusted according to the shape of the workpiece, the airflow may be blocked by the mold or workpiece, forming local eddies or dead zones. If the fan position is not set properly, effective heat convection may not be achieved, which is especially noticeable for large tanks or high-density workpieces. Utility Model Content

[0003] To address the aforementioned issues, the purpose of this invention is to provide a dual-fan circulation structure autoclave that utilizes front and rear dual fans in synergistic operation to achieve efficient airflow circulation. This solves the temperature uniformity problem inherent in traditional single-fan solutions, effectively controls air circulation efficiency, reduces energy consumption, improves temperature uniformity, and thus significantly enhances the curing quality of composite materials.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: a dual-fan circulating structure autoclave, comprising an autoclave body and openable doors at both ends of the autoclave body. Inside the autoclave body, there is a perforated air guide device with a diameter smaller than that of the autoclave body. An annular cavity is formed between the air guide device and the inner wall of the autoclave body. Finned heaters are fixed in the annular cavity. At both ends of the air guide device, there are tapered air guide cones that gradually narrow outward. Front and rear fan units are fixed at the doors at the front and rear ends, respectively. The front impeller driven by the front fan unit is located inside the opening at the outer end of the front air guide cone, and the rear impeller driven by the rear fan unit is located at the tip of the rear air guide cone.

[0005] Furthermore, the exterior of the autoclave is wrapped with an insulation layer.

[0006] Furthermore, both the front and rear fan units use water-cooled motors.

[0007] Furthermore, the main body of the autoclave is supported and fixed to the base plate by multiple support legs.

[0008] Furthermore, the inlet flange and outlet flange of the finned heater are located on the same side and extend through the rear tank door.

[0009] Furthermore, multiple pipe interfaces are fixed through the top of the autoclave body.

[0010] Furthermore, the vertical cross-section of the air duct device is a square structure, and finned heaters are evenly arranged on the top, bottom, left, and right sides of the air duct device.

[0011] Through the above settings, this invention can effectively control air circulation efficiency, reduce energy consumption load, and improve temperature uniformity inside the tank, achieving the following significant beneficial effects: This utility model features a dual-fan system that works in a collaborative mode to significantly improve air circulation efficiency. The fan speed and pressure can be flexibly adjusted according to the tank volume. Especially for large-sized autoclaves, it can form a bidirectional airflow circulation, effectively shorten the airflow path, avoid local airflow stagnation, improve the air renewal rate inside the tank, significantly optimize the heat and cold transfer efficiency, and provide a more stable airflow environment for the processing. This invention is more economical in terms of energy consumption. Compared with a single fan that requires high power to overcome vacuum resistance, the dual fans can achieve "output on demand" through power distribution. The single fan operates during low load periods, while the dual fans work together during high load periods, avoiding the energy waste of a single fan operating at full load for a long time. At the same time, the bidirectional airflow circulation reduces airflow resistance loss, and long-term use can significantly reduce the production costs of enterprises. This invention provides precise and controllable temperature uniformity. The dual fans, arranged symmetrically, create a "convection complementarity" effect, effectively offsetting local temperature deviations within the tank. When the temperature on one side is too high, the fan on the other side can enhance heat delivery; conversely, they work together to increase heat supply. Combined with real-time feedback from temperature sensors, the dual fans can dynamically adjust the airflow distribution, ensuring precise temperature control within the tank. This meets the processing requirements of aerospace composite materials and high-end components, which have extremely high temperature accuracy requirements, thus fundamentally avoiding quality problems such as uneven curing and performance differences. This invention offers enhanced operational stability and reliability. The dual-fan structure features a "redundant backup" function. If one fan fails, the other can immediately switch to emergency mode to maintain basic operation, preventing production interruptions caused by a single fan failure. Furthermore, the distributed layout of the dual fans reduces the operating load of individual fans, lowers mechanical wear rates, and extends the mean time between failures (MTBF) of the equipment, providing a more reliable guarantee for continuous production. This utility model has a wider range of applications. The dual fans can flexibly meet the processing needs of different sizes and materials by adjusting the adaptability of wind speed and wind pressure. From small precision components to large composite material parts, from low temperature curing to high temperature molding, the optimal processing parameters can be achieved through the dynamic adjustment of the dual fans. This flexibility enables the dual fan autoclave to adapt to the production needs of multiple fields such as aerospace, new energy, and high-end equipment manufacturing, thereby enhancing the comprehensive utilization value of the equipment. Attached Figure Description

[0012] The present invention will now be further described with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the internal structure of the present invention from the front view. Figure 2This is a schematic diagram of the vertical cross-sectional structure of this utility model; Figure 3 This is a schematic diagram of the internal airflow during the working state of this utility model. Detailed Implementation

[0014] like Figure 1-2 As shown, a dual-fan circulating structure autoclave includes an autoclave body 3 and a can door 8 with openings at both the front and rear ends of the autoclave body 3. Inside the autoclave body 3, there is a perforated air guide device 4 with a diameter smaller than that of the autoclave body 3. An annular cavity is formed between the air guide device 4 and the inner wall of the autoclave body 3. Finned heaters 7 are fixed in the annular cavity. At both ends of the air guide device 4, there are conical air guide cones 5 that gradually narrow outward. The can door 8 at the front and rear ends is fixed with a front fan unit 1 and a rear fan unit 6, respectively. The front impeller 9 driven by the front fan unit 1 is located in the opening at the outer end of the front air guide cone 5, and the rear impeller 10 driven by the rear fan unit 6 is located at the tip of the rear air guide cone 5.

[0015] Other auxiliary devices are also provided, such as: the exterior of the autoclave body 3 is wrapped with a heat insulation layer; the motors of the front fan unit 1 and the rear fan unit 6 are both water-cooled motors; the autoclave body 3 is supported and fixed on the base plate 12 by multiple support legs 11; the inlet flange 13 and outlet flange 14 of the finned heater 7 are located on the same side and pass through the rear door 8; multiple pipe interfaces 2 are fixed through the top of the autoclave body 3; the vertical cross section of the air guide device 4 is a square structure; and the finned heaters 7 are evenly arranged on the top, bottom, left and right sides of the air guide device 4.

[0016] Working principle of this utility model: The front fan unit 1 and the rear fan unit 6 are respectively installed on the tank doors 8, which are openable at both ends. Both the front impeller 9 and the rear impeller 10 are bidirectional turbine impellers. The front fan unit 1 delivers air into the air duct device 4 through the front guide cone 5, while the rear fan unit 6 draws air in through the rear guide cone 5 and then through the space surrounding the air duct device 4 where finned heaters 7 are installed. The hot air circulates from the tail of the tank to the front, forming a closed thermal cycle within the tank. The airflow circulation path is shown below. Figure 3 It forms an "8" shape.

[0017] The air duct 4 is designed as a cuboid, with upper, left, right, and lower rails. Ventilation holes are provided at the top and left and right sides, allowing some heat flow to enter the air duct device through these holes, further ensuring temperature uniformity inside the tank. The front and rear fan units work together to control airflow, effectively controlling the air circulation efficiency inside the tank. The front fan unit directs airflow into the air duct device 4, preventing backflow of air at the front and thus improving temperature uniformity inside the tank. The coordinated airflow control of the front and rear fan units can reduce the load on a single fan, effectively reducing energy consumption. For example, if a single fan needs to operate at an overload of 1200W, the circulation effect at the other end is not good. However, with both fans operating at 500W simultaneously, both ends receive effective airflow, resulting in better circulation and thus greater energy savings. This achieves a "1+1>2" effect, and neither fan needs to operate at an overload, significantly extending their service life by at least two times.

[0018] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A dual-fan circulating autoclave, comprising an autoclave body (3) and autoclave doors (8) with openings at both ends of the autoclave body (3) that can be opened and closed, characterized in that: The autoclave body (3) is supported by a perforated air guide device (4) with a diameter smaller than that of the autoclave body (3). An annular cavity is formed between the air guide device (4) and the inner wall of the autoclave body (3). A uniformly arranged finned heater (7) is fixed in the annular cavity. A tapered air guide cone (5) that gradually narrows outward is fixed at both ends of the air guide device (4). A front fan unit (1) and a rear fan unit (6) are fixed at the tank doors (8) at the front and rear ends, respectively. The front impeller (9) driven by the front fan unit (1) is located in the opening at the outer end of the front air guide cone (5), and the rear impeller (10) driven by the rear fan unit (6) is located at the tip of the rear air guide cone (5).

2. The autoclave with a dual-fan circulating structure as described in claim 1, characterized in that: The exterior of the autoclave body (3) is covered with an insulation layer.

3. The autoclave with a dual-fan circulating structure as described in claim 1, characterized in that: Both the front fan unit (1) and the rear fan unit (6) use water-cooled motors.

4. The autoclave with a dual-fan circulation structure as described in claim 1, characterized in that: The main body (3) of the autoclave is supported and fixed on the base plate (12) by multiple legs (11).

5. The autoclave with a dual-fan circulating structure as described in claim 1, characterized in that: The inlet flange (13) and outlet flange (14) of the finned heater (7) are located on the same side and pass through the rear tank door (8).

6. The autoclave with a dual-fan circulating structure as described in claim 1, characterized in that: Multiple pipe interfaces (2) are fixed through the top of the autoclave body (3).

7. The autoclave with a dual-fan circulating structure as described in claim 1, characterized in that: The air duct device (4) has a square vertical cross-section, and the finned heaters (7) are evenly arranged on the top, bottom, left and right sides of the air duct device (4).

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