Terahertz air interchanger

Abstract

The utility model discloses a terahertz air interchanger, which comprises a main body, a first air interchanger, a second air interchanger, a first air interchanger and a second air interchanger, the first waveguide window is arranged in the first window of the cavity; the second waveguide window is arranged in a second window of the cavity; the absorption layer is arranged on the side wall of the main body and in an area outside the first window and the second window; the main body, the first waveguide window, the second waveguide window and the absorption layer define a tunnel, and the airflow enters from the first waveguide window and is transmitted to the second waveguide window along the tunnel to flow out.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic shielding, in particular to a terahertz ventilation device. Background Art

[0002] A ventilation waveguide window is a component used in an electromagnetic shielding room, which is the main channel for the exchange of air inside and outside the shielding room. It can effectively block the penetration of electromagnetic waves. The ventilation waveguide window is composed of many small cutoff waveguides, and its cross-sectional shape usually has the following several types: circular, square, and hexagonal, with hexagonal being the most commonly used. The ventilation waveguide window generally consists of a frame and a hexagonal honeycomb core material. The materials of the honeycomb core and the frame are: steel, aluminum alloy, and copper. The forming process uses vacuum brazing or argon arc welding process. The above ventilation waveguide window is a common form in electromagnetic shielding rooms. For the ultra-high frequency band such as 80GHZ - 200GHz, it is called the terahertz band. For the terahertz ventilation device, it is required to meet the shielding efficiency of up to 200G. In order to achieve such a high cutoff frequency, relying solely on the honeycomb waveguide window, it is necessary to reduce the size of the holes and slots. After calculation, the equivalent aperture is 0.75mm. The above aperture will cause large wind resistance, low ventilation efficiency, high production cost, and great processing difficulty in actual applications, and does not have the characteristics of practical promotion. The above-mentioned conventional forming scheme will not be applicable to the forming method of the waveguide window shielding ventilation device in the terahertz band due to material characteristics.

[0003] For a terahertz shielding room, in order to keep the air inside the shielding room flowing, a waveguide window device is required. However, the honeycomb waveguide window with an equivalent aperture of 0.75mm has problems such as large wind resistance, low ventilation efficiency, high production cost, great processing difficulty, and lack of practicality. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a terahertz ventilation device, which integrates shielding, wave absorption, and terahertz band characteristics, etc.

[0005] The terahertz ventilation device of the utility model includes:

[0006] A main body, the main body encloses a cavity, and a first window and a second window are provided on the cavity;

[0007] A first waveguide window, which is arranged at the first window of the cavity;

[0008] A second waveguide window, which is arranged at the second window of the cavity;

[0009] An absorption layer, which is arranged on the side wall of the main body and in the area other than the first window and the second window;

[0010] The main body, the first waveguide window, the second waveguide window, and the absorption layer enclose a tunnel, such that the incoming air flow enters from the first waveguide window, travels along the tunnel, and exits from the second waveguide window.

[0011] Compared with the prior art, the advantages of the present utility model are as follows:

[0012] By designing a spliced board as the storage board, the transportation is greatly facilitated; at the same time, using snap splicing as the connection method greatly improves the operability of tool-free installation and disassembly; the use of strengthening columns greatly increases the overall strength and load-bearing capacity of this storage rack, enabling it to handle more usage scenarios and requirements. Description of the Drawings

[0013] Figure 1 It is the front view of the terahertz ventilation device of the present utility model;

[0014] Figure 2 It is the top view of the terahertz ventilation device of the present utility model;

[0015] Figure 3 It is the cross-sectional view of the terahertz ventilation device of the present utility model. Detailed Embodiment

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. Obviously, the described embodiments of the present utility model are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] The terahertz ventilation device of the present utility model includes:

[0018] A main body 10, the main body encloses a cavity, and there are a first window and a second window on the cavity;

[0019] A first waveguide window 101, which is arranged at the first window of the cavity;

[0020] A second waveguide window 201, which is arranged at the second window of the cavity;

[0021] An absorption layer 301, which is arranged on the side wall of the main body 10 and in the area other than the first window and the second window;

[0022] The air flow enters from the first waveguide window 101, travels along the tunnel, and exits from the second waveguide window 201.

[0023] In an embodiment of the present utility model, the main body 10 includes a pressing plate 501, which is U-shaped with openings on three sides. A first window is provided at the opening on the top surface, a second window is provided at the lower half of the opening on the side surface, an absorption layer 301 is provided at the upper half of the opening on the side surface, and a packaging structure 40 is provided at the opening on the bottom surface.

[0024] In an embodiment of the present utility model, the first waveguide window 101 and the second waveguide window 201 are honeycomb waveguide windows.

[0025] In an embodiment of the present utility model, the electromagnetic wave shielding band of the first waveguide window 101 and the second waveguide window 201 is 80 GHz - 200 GHz.

[0026] In an embodiment of the present utility model, the honeycomb aperture of the honeycomb waveguide window is 0.75 mm - 3 mm.

[0027] In an embodiment of the present utility model, the first waveguide window 101 and the second waveguide window 201 are welded to the pressing plate.

[0028] In an embodiment of the present utility model, the pressing plate 501 is a steel plate with a thickness of 2 mm.

[0029] In an embodiment of the present utility model, the packaging structure 40 is a packaging plate with threads, and is connected to the pressing plate 501 by threads.

[0030] The terahertz ventilation device of the present utility model is applied to ventilation in 80 - 200 G terahertz shielding, solves the problem of realizing shielding of waveguide windows in the terahertz band, and is particularly suitable for terahertz shielding rooms, terahertz anechoic chambers, etc.

[0031] In a preferred embodiment of the present utility model, a terahertz ventilation device is provided, in which, two honeycomb waveguide windows with a shielding effectiveness of 100 G, an absorption layer 301 of wave-absorbing material, and the main body 10 form a closed cavity to form a tunnel 401 through which air can flow.

[0032] The structural form of the terahertz ventilation device in an embodiment of the present utility model includes the main body 10, the first waveguide window 101, the second waveguide window 201, the absorption layer 301, the pressing plate 501, and the packaging structure 40, as Figures 1-3 shown.

[0033] Among them, the first waveguide window 101 and the second waveguide window 201 are both honeycomb waveguide windows with a cut-off frequency of 14K - 100G and effective shielding, for example, 100G. The waveguide window is designed in a honeycomb structure, which can increase its mechanical strength while allowing electromagnetic waves to pass through smoothly within a specific frequency range. The first waveguide window 101 and the second waveguide window 201 both include a waveguide window frame and a honeycomb structure connected to the waveguide window frame and located within the waveguide window frame. The honeycomb aperture of the first waveguide window 101 and the second waveguide window 201 is 0.75mm to 3mm, for example, 1.5mm, 2mm. The first waveguide window and the second waveguide window both include a frame 3011 and a honeycomb structure 3012, and are welded together by self-fusion between the frame and the honeycomb structure. The waveguide window is a device for transmitting electromagnetic waves and has wide applications in fields such as communication and radar. In this embodiment, the self-fusion of the honeycomb waveguide window specifically means: embedding the honeycomb structure into the frame of the waveguide window to ensure that the honeycomb structure is tightly combined with the waveguide window frame. By heating the contact surface between the honeycomb structure and the waveguide window frame, they are melted and fused together. This technology can significantly improve the performance and reliability of equipment in high-frequency communication devices, radar systems, and microwave transmission devices.

[0034] Among them, the main body 10, the first waveguide window 101, the second waveguide window 201, and the absorption layer 301 enclose a tunnel 401, and the airflow enters from the first waveguide window 101 and is transmitted along the tunnel 401 to the second waveguide window 201 and flows out. In the waveguide window, the tunnel refers to the path or channel formed when microwave or radio frequency signals pass through the waveguide structure. These tunnels are used to guide electromagnetic waves from one position to another while minimizing signal loss and reflection. The waveguide window is a special structure for allowing electromagnetic waves to pass through while isolating the physical environments on both sides. Specifically, each small channel in the honeycomb structure is also called a tunnel. When electromagnetic waves propagate in these tunnels, the honeycomb design can help maintain the direction and intensity of the wave, reducing loss and reflection.

[0035] In this embodiment, it also includes a pressing plate 501. The pressing plate is an important part of the waveguide window and is usually used to provide mechanical support and sealing. Its main functions include: The pressing plate provides the structural integrity of the waveguide window main body to ensure that the waveguide window will not deform or be damaged during use. The pressing plate helps to seal the waveguide window to prevent the external environment (such as moisture, dust, etc.) from entering the waveguide system, and at the same time prevents the leakage of microwaves inside the waveguide. The pressing plate can also help with heat dissipation to maintain the temperature stability of the waveguide system.

[0036] In this embodiment, the pressing plate 501 of the main body is formed by bending and welding a 2mm steel plate, and is in a three-sided open type, that is, a U-shaped with an open top, an open bottom, and an open side. The first waveguide window 101 is welded on the open top, and the second waveguide window 201 is welded on the lower opening of one side.

[0037] In one embodiment, to reduce deformation, the edges of the second waveguide window 101 and the second waveguide window 201 are made into a bent structure, as Figure 3 shown.

[0038] In one embodiment, an absorption layer 301 is further provided in the upper half of the side opening. Specifically, the absorption layer is composed of an absorption material that has absorption for electromagnetic waves. After the pressing plate and the waveguide window are welded, kerosene detection needs to be carried out to detect whether there are leakage points. After the inspection is completed, the wave-absorbing material is laid. The wave-absorbing range of the wave-absorbing material needs to be extended to 200G, and a papillary structure is adopted. Since the combustion point of the 301 wave-absorbing material is low, the pressing plate and the waveguide window are welded first and then the 301 wave-absorbing material is laid to form the absorption layer. Common pressing plate materials of the absorption material include metals (such as aluminum, copper) and high-strength composite materials. These materials have good mechanical strength and thermal conductivity. In one embodiment, the absorption material includes ferrite, graphite, carbon nanotubes, and some polymer materials.

[0039] In other embodiments, the absorption layer can also be a layer of absorption layer material formed on the pressing plate.

[0040] The absorption material in the waveguide window is mainly used to reduce reflection and absorb unwanted electromagnetic waves, thereby improving the performance of the waveguide system. The absorption material can absorb the excess electromagnetic waves entering the waveguide window, reduce reflection, prevent signal interference, and absorb stray electromagnetic waves.

[0041] Finally, the pressing plate screw-mounted packaging structure 40 is used to seal the bottom opening, as Figure 1 and Figure 2 shown. Thus, the pressing plate 501, the first waveguide window 101, the second waveguide window 201, the absorption layer 301, and the packaging structure 40 enclose a closed tunnel 401.

[0042] In one embodiment, the tunnel 401 adopts a first-level tunnel (first-level attenuation) structure.

[0043] After the above device is completed, it can be installed in directions such as a terahertz shielding dark box, a terahertz shielding room, a terahertz shielding dark room, etc.

[0044] In other embodiments, the pressing plate 501 can also adopt other shapes, and the first waveguide window 101 and the second waveguide window 201 can be arranged at other opening positions surrounded by the pressing plate. Enclose a closed tunnel of other shapes. The terahertz ventilation device manufactured using other tunnel forms can all be regarded as some variants of the present invention.

[0045] In other embodiments, the terahertz ventilation devices manufactured using multi-stage waveguide windows can all be regarded as some variants of the present invention.

[0046] In one embodiment, the pressing plate and the first waveguide window, the second waveguide window, and the encapsulation structure may be a detachable structure.

[0047] This structure will provide the necessary components and practical experience for realizing terahertz shielding technology, and lay a foundation for breaking through the localization of terahertz shielding technology.

[0048] This utility model has the following beneficial effects:

[0049] 1) The terahertz ventilation device implemented in this solution is manufactured using a common honeycomb waveguide window structure, combined with a tunnel structure, and the inner periphery is covered with wave-absorbing materials, greatly improving the cut-off waveguide frequency of electromagnetic shielding, up to 200G at most, which becomes one of the basic conditions for the terahertz magnetic shielding room to meet the technical index requirements.

[0050] 2) The terahertz ventilation device involved in this solution not only uses a common honeycomb waveguide window structure, but also proposes a new forming method from the perspective of electromagnetic wave characteristics, which is easy to operate and has strong engineering capabilities.

[0051] 3) For the terahertz ventilation device involved in this solution, in addition to selecting traditional waveguide window materials and processes, the attenuation of energy is achieved by designing a tunnel structure, ensuring the shielding effectiveness at ultra-high frequencies.

[0052] This structure applies the tunnel configuration to the terahertz ventilation device for the first time. The terahertz ventilation device needs to meet a shielding effectiveness of up to 200G. In traditional technologies, simply relying on the honeycomb waveguide window to achieve a cut-off frequency of 200G, the hole slit is very small, with a diameter of about 0.75mm. The above aperture will cause large wind resistance, high ventilation efficiency, high production cost, and great processing difficulty in actual applications, and does not have the characteristics of practical promotion.

[0053] In this utility model, the cut-off frequency of the honeycomb waveguide window is reduced to 100G, and the equivalent diameter is 1.5mm. It is feasible to process the honeycomb structure of this specification model, and through research on manufacturers, the production of waveguide windows with an equivalent diameter of 1.5mm can be achieved.

[0054] Terahertz-band electromagnetic waves have the characteristics of strong penetration and weak bypass ability. Utilizing this feature, the tunnel technology is adopted. The tunnel technology is applied in some special electromagnetic attenuation and electromagnetic shielding. This principle makes full use of the characteristic that the bypass ability of electromagnetic waves weakens as the electromagnetic frequency increases. However, this characteristic is not very obvious below 60G. Therefore, this structure is preferably applied in the terahertz band above 100G, and an absorbing material is covered inside the tunnel to assist in achieving the attenuation of electromagnetic waves. The tunnel structure can be a first-level tunnel or a second-level tunnel, which can be determined by the range of the cut-off frequency. The first-level tunnel refers to the most basic absorption structure in the waveguide window, usually including a single layer of absorbing material or a simple attenuation structure, a simple structure. The first-level tunnel usually adopts a simple absorbing material layer and is directly attached to the inner surface of the waveguide window. This structure is mainly used to absorb unwanted electromagnetic waves within a specific frequency range, reducing reflection and interference. It is suitable for application scenarios with relatively low requirements for absorption performance or cost sensitivity. The second-level tunnel refers to a more complex multi-layer absorption structure in the waveguide window, a complex structure. The second-level tunnel usually adopts multi-layer absorbing materials, each layer having different electromagnetic characteristics, to achieve absorption in a wider frequency range and a higher attenuation effect. This structure can not only absorb electromagnetic waves in a wider frequency band but also reduce wave reflection and multiple attenuations through the multi-layer structure, improving the overall absorption efficiency. It is suitable for application scenarios with relatively high requirements for absorption performance, such as high-frequency microwave systems, high-power radars, etc.

[0055] The ventilation device involved in this patent adopts a tunnel structure and is covered with an absorbing material, combined with a waveguide window with a low cut-off frequency, which greatly improves the cut-off frequency of electromagnetic shielding and becomes one of the basic conditions for the terahertz shielding room to meet the technical index requirements.

[0056] The terahertz ventilation device involved in this patent not only uses traditional waveguide window materials and processes but also proposes a new forming method from the perspective of electromagnetic wave behavior, which is easy to operate and has strong engineering feasibility.

[0057] The terahertz ventilation device involved in this patent, in addition to selecting traditional waveguide window materials and processes, realizes the attenuation of energy by designing the tunnel structure, ensuring the shielding effectiveness at ultra-high frequencies.

[0058] The above are only the embodiments of this application, and do not limit the patent scope of this application accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this application, such as the mutual combination of technical features between various embodiments, or direct or indirect application in other related technical fields, shall be included in the patent protection scope of this application by the same token.

Claims

1. A terahertz ventilation device, characterized in that: include: A main body, the main body encloses a cavity, and has a first window and a second window on the cavity; A first waveguide window, disposed at a first window of the cavity; A second waveguide window is disposed at a second window of the cavity; An absorption layer is disposed on the side wall of the main body and in an area outside the first window and the second window; The main body, the first waveguide window, the second waveguide window and the absorption layer form a tunnel, so that the incoming airflow enters from the first waveguide window, is transmitted along the tunnel and flows out from the second waveguide window.

2. The terahertz ventilation device according to claim 1, characterized in that: The main body includes a pressing plate, which is U-shaped and has openings on three sides. The top opening is provided with a first window, the lower half of the side opening is provided with a second window, the upper half of the side opening is provided with an absorption layer, and the bottom opening is provided with a packaging structure.

3. The terahertz ventilation device according to claim 2, characterized in that: The first waveguide window and the second waveguide window are honeycomb waveguide windows; The electromagnetic wave shielding band of the first waveguide window and the second waveguide window is 80 GHz-200 GHz.

4. The terahertz ventilation device according to claim 3, characterized in that: The honeycomb aperture of the honeycomb waveguide window is 0.75 mm to 3 mm.

5. The terahertz ventilation device according to claim 4, characterized in that: The first waveguide window and the second waveguide window both include a frame and a honeycomb structure, and the frame and the honeycomb structure are welded by self-fusion welding.

6. The terahertz ventilation device according to claim 2, characterized in that: The pressing plate is a steel plate with a thickness of 2 mm.

7. The terahertz ventilation device according to claim 2, characterized in that: The packaging structure is a packaging plate with threads, which is connected to the pressing plate through threads.

8. The terahertz ventilation device according to claim 2, characterized in that: The absorption layer is formed by using an absorbing material and has a papillary structure.

9. The terahertz ventilation device according to claim 2, characterized in that: The second waveguide window and the edge of the second waveguide window are formed into a bent structure, and the bent structure is used for welding with the pressing plate.

Images