Dense wavelength division multiplexing filter structure
By designing a dynamically controlled heat dissipation device in a dense wavelength division multiplexing filter, and using liquid expansion to drive the floating plate to float up and adjust the motor speed, the problem of filter temperature drift is solved, stable heat dissipation control is achieved, and signal transmission stability is improved.
Patent Information
- Application Number
- CN202421346116.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-06-13
AI Technical Summary
In dense wavelength division multiplexing systems, the filter can easily cause temperature drift and signal loss due to the heat generated by itself. The prior art is difficult to control heat dissipation targetedly based on the heat generation of the filter, resulting in excessive or insufficient heat dissipation.
A dense wavelength division multiplexing filter structure is designed, using a built-in heat dissipation device and control structure of the shell, which drives the floating plate to float through liquid expansion, changes the resistance value and adjusts the motor speed, and realizes dynamic control of heat dissipation efficiency.
Effectively control the heat dissipation intensity of the filter, stabilize and maintain the temperature of the filter, avoid temperature drift, and improve the signal transmission stability of dense wavelength division multiplexing systems.
Smart Images
Figure CN222852529U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of filter heat dissipation, and in particular to a dense wavelength division multiplexing filter structure. Background Art
[0002] Dense wavelength division multiplexing technology refers to a fiber optic data transmission technology, the core component of which is an optical filter. This technology uses the wavelength of laser light to transmit data in optical fiber in parallel or in series. The above technology assigns the incoming optical signal to a specified frequency (wavelength) within a specific frequency band, and then multiplexes the signal into one optical fiber, thereby increasing the bandwidth of the laid optical cable and improving transmission efficiency.
[0003] In actual practice, in order to reasonably utilize the broadband resources generated by the optical fiber in the low-loss area, it is necessary to divide the low-loss area of the optical fiber into multiple optical channels according to different frequencies and wavelengths. In order to reduce the loss of optical signal energy and improve the utilization rate of the optical fiber, the interval between each optical channel is often short, which requires more precise requirements for the filter. Generally, the filter is prone to operate in a high-temperature state due to its own heat generation during use, which will cause temperature drift in the filter, making the filter prone to signal loss in the dense wavelength division multiplexing system.
[0004] Most of the existing filters with heat dissipation function are directly equipped with a heat dissipation structure, which makes it difficult to dissipate heat in a targeted manner according to the heat generated by the filter. This can easily cause excessive heat dissipation to cause a large fluctuation in the overall temperature of the filter, or insufficient heat dissipation to cause the overall temperature of the filter to continue to rise, thereby causing the temperature drift of the filter. This type of filter is difficult to maintain the stability of the filtering performance in the dense wavelength division multiplexing system. Utility Model Content
[0005] The utility model aims to solve the above-mentioned problem, thereby providing a filter capable of controlling the heat dissipation intensity of the filter according to the heat generation of the filter.
[0006] The utility model solves the above problems and adopts the following technical solutions:
[0007] A dense wavelength division multiplexing filter structure comprises a filter body and a shell, wherein the filter body is arranged in the shell, and a heat dissipation device for dissipating heat from the filter body is arranged in the shell, wherein the heat dissipation device comprises a motor and a fan blade fixedly sleeved on the motor shaft, and an exhaust port is provided on the shell; a control structure is also provided in the shell, and the control structure comprises a containing cylinder, and metal joints of the same height are provided on the two side walls of the containing cylinder, and the outer sides of the two metal joints are connected in series to an armature circuit where the motor is located, and the inside of the containing cylinder is filled with liquid, and a floating plate floats on the liquid surface, and a resistance structure is fixedly connected to the upper surface of the floating plate, and the two ends of the resistance structure are respectively connected to the inner sides of the two metal joints, and the floating plate and the side of the containing cylinder filled with liquid form a sealed space, and an air pressure balance port is provided on the upper side wall of the containing cylinder, and the resistance structure changes the resistance value connected to the metal joint according to the floating height of the floating plate.
[0008] Compared with the prior art, the utility model adopting the above technical solution has the following beneficial effects:
[0009] By adopting the above technical solution, the filter body is arranged in a shell, an exhaust port is opened on the shell, a control structure and a motor with fan blades are also arranged in the shell, the resistance structure in the accommodating tube is arranged on the upper side of the floating plate, the floating plate and the accommodating chamber form a sealed space on the side filled with liquid, when the temperature in the shell rises, the liquid in the accommodating tube absorbs the ambient temperature and begins to expand, so that the floating plate floats, and the resistance structure is connected to the metal joint to form a variable resistance structure similar to a potentiometer, the control structure is connected in series to the armature circuit of the motor, and the speed of the motor is adjusted by changing the resistance value in the circuit, so as to control the heat dissipation efficiency according to the high and low temperatures inside the shell, so as to achieve temperature control stability.
[0010] As a preferred embodiment, a further technical solution of the utility model is:
[0011] The resistance structure includes multiple conductive layers of equal thickness, each conductive layer is arranged parallel to the floating plate, and each conductive layer is stacked in sequence along the floating direction of the floating plate. The conductive layer includes two insulating layers and a resistance layer located between the two insulating layers. The resistance value of each resistance layer increases in sequence along the floating direction of the floating plate, and the two ends of one resistance layer are respectively abutted against two metal joints. Each conductive layer abuts against the metal joints to realize a path during the floating process. When the temperature inside the shell rises, the floating plate drives the conductive layer upward. When the resistance value of the conduction is larger, the motor speed is slower. When the temperature inside the shell is higher, the liquid expansion volume is larger, the floating plate rises higher, the resistance value of the conduction is smaller, the motor speed is faster, and the heat dissipation effect is better.
[0012] The accommodating tube is divided into two sections, the upper section has a smaller cross-sectional area than the lower section, the metal joint is located in the upper section of the accommodating tube, and the floating plate is always located in the lower section of the accommodating tube. Through the above solution, the floating plate is tightly against the segmented wall of the accommodating tube during the floating process, preventing the liquid from continuously rising during the floating process and causing the liquid to immerse the metal joint.
[0013] The lower side wall of the accommodating tube is provided with a plurality of limit grooves along the floating direction of the floating plate, and a telescopic spring is fixedly connected in the limit groove. A spherical block is fixedly provided at one end of the telescopic spring away from the bottom of the limit groove, and at most half of the sphere of the spherical block is exposed outside the limit groove. The elastic modulus of each telescopic spring arranged along the floating direction of the floating plate increases successively, and the interval between adjacent limit grooves is equal to the thickness of each conductive layer. Through the above scheme, by setting a structure of multiple layers of limit grooves and telescopic springs, during the rising process of the floating plate, the spherical block with a low height is first pressed against, and when the temperature continues to rise, the lower liquid continues to expand. When the pressure of the lower liquid reaches a certain value, the floating plate is pushed up and the spherical block is pushed into the limit groove. The floating plate begins to float up and presses against another spherical block on the upper part. In this process, the rising height of the floating plate is equal to the thickness of the conductive layer, realizing the alternation of the contact and conduction between each conductive layer and the metal joint.
[0014] A hydraulic reserve chamber with a volume larger than that of the accommodating cylinder is also fixed in the shell, the hydraulic reserve chamber is connected to the lower section of the accommodating cylinder, and the hydraulic reserve chamber is filled with the same liquid as that in the accommodating cylinder. Through the above scheme, a large amount of liquid in the hydraulic reserve chamber can absorb more heat energy in the shell to increase the pressure of the liquid under the floating plate, thereby increasing the floating support force for the floating plate and providing a greater force for the floating plate to float.
[0015] The side wall of the hydraulic reserve chamber is provided with a pressure relief valve and a one-way valve for liquid inlet. Through the above scheme, when the filter body fails and generates a lot of heat, the hydraulic energy of the liquid exceeds the threshold, the pressure relief valve opens and releases pressure, and the one-way valve is used to replenish the liquid.
[0016] The buffer sealing layer is fixedly arranged on the side of the floating plate facing away from the liquid. Through the above scheme, the buffer sealing layer is used to reduce the impulse of the floating plate and the upper and lower walls of the containing tube during the floating process, so as to avoid the impact force generated from affecting the sealing of the space enclosed by the floating plate and the containing tube. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;
[0018] Figure 2 is a cross-sectional view of a control junction of an embodiment of the present application;
[0019] Figure 3 In the embodiment of this application Figure 2A local enlarged view of point A;
[0020] Figure 4 In the embodiment of this application Figure 2 A partial enlarged view of point B.
[0021] In the figure:
[0022] 1. Filter body; 2. Shell; 3. Heat dissipation device; 31. Motor; 32. Fan blades; 4. Control structure; 41. Receiving tube; 42. Metal joint; 43. Floating plate; 44. Resistance structure; 441. Conductive layer; 4411. Insulating layer; 4412. Resistance layer; 5. Exhaust vent; 6. Limiting groove; 7. Telescopic spring; 8. Spherical block; 9. Hydraulic reserve chamber; 10. Pressure relief valve; 11. One-way valve; 12. Buffer sealing layer; 13. Temporary storage box. DETAILED DESCRIPTION
[0023] The present invention is further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.
[0024] Reference Figure 1-4 The embodiment of the present application discloses a dense wavelength division multiplexing filter structure, including a filter body 1 and a rectangular and horizontally placed shell 2, the filter body 1 is fixedly connected to the shell 2, and each of its terminal ends passes through the side wall of the shell 2 and is placed on the outside of the shell 2, and a heat dissipation device 3 is also provided in the shell 2, the heat dissipation device 3 includes a DC motor 31 and a fan blade 32 fixedly mounted on the rotating shaft of the DC motor 31, the DC motor 31 is fixedly connected to a side wall of the shell 2, and a plurality of exhaust ports 5 are opened on the side wall of the shell 2 opposite to the DC motor 31.
[0025] In this embodiment, a control structure 4 is further provided in the housing 2. The control structure 4 includes a receiving tube 41 fixedly provided in the housing 2 and vertically provided. The receiving tube 41 is divided into an upper and lower section. The cross-sectional area of the upper section is smaller than that of the lower section. Metal joints 42 of the same height are provided on both side walls of the upper section of the receiving tube 41. The outer sides of the two metal joints 42 are connected in series to the armature circuit where the DC motor 31 is located through wires. The receiving tube 41 is filled with a liquid that is easy to expand and contract with heat. Preferably, the liquid is water, mercury or other liquids with a high boiling point. A floating plate 4 is floating on the liquid surface. 3. The floating plate 43 is always located at the lower section of the accommodating tube 41. A resistor structure 44 is fixedly connected to the upper surface of the floating plate 43. Two ends of the resistor structure 44 are respectively connected to the inner sides of two metal joints. The floating plate 43 and the side of the accommodating tube 41 containing liquid form a sealed space. An air pressure balance port is provided on the top wall of the upper part of the accommodating tube 41. The resistor structure 44 changes the resistance value of the connection with the metal joint 42 according to the floating height of the floating plate 43. A buffer sealing layer 12 is also fixedly provided on the upper surface of the floating plate 43. The lower end of the resistor structure 44 passes through the buffer sealing layer 12 and is fixed to the floating plate 43.
[0026] In this embodiment, the resistor structure 44 includes three layers of conductive layers 441 of equal thickness stacked in sequence along the vertical direction, each conductive layer 441 is arranged in parallel with the floating plate 43, and the conductive layer 441 includes two insulating layers 4411 and a resistor layer 4412 located between the two insulating layers 4411. The resistance value of each resistor layer 4412 increases in sequence along the floating direction of the floating plate 43, and the two sides of one resistor layer 4412 are respectively in contact with two metal joints 42. The liquid absorbs the heat in the shell 2 to expand, so that the floating plate 43 floats up, and each layer of the conductive layer 441 abuts against the metal joint 42 during the floating process to realize the passage. When the resistance value of the conductive resistor layer is larger, the speed of the DC motor 31 is slower; the higher the temperature in the shell 2, the larger the expansion volume of the liquid, the higher the rising height of the floating plate 43, the smaller the resistance value of the resistor layer abutting the metal joint, and thus the DC motor 31 The faster the speed, the higher the heat dissipation efficiency.
[0027] In this embodiment, a plurality of equally spaced limit grooves 6 are provided on the side wall of the lower section of the accommodating tube 41 along the floating direction of the floating plate. Preferably, three layers of limit grooves 6 are provided for the three layers of conductive layer 441. A horizontal telescopic spring 7 is fixedly connected in the limit groove 6. One end of the telescopic spring 7 is fixed to the bottom of the limit groove 6. A spherical block 8 is fixedly provided at the end of the telescopic spring 7 away from the bottom of the limit groove 6. At most half of the sphere of the spherical block 8 is exposed outside the limit groove 6. The elastic modulus of each telescopic spring 7 along the floating direction of the floating plate increases successively, and the interval between adjacent limit grooves 6 is equal to the thickness of each conductive layer 441. By setting up a structure of multiple layers of limiting grooves 6 and telescopic springs 7, during the rising process of the floating plate 43, it first presses against the spherical block 8 at a lower height. When the temperature continues to rise, the lower liquid continues to expand. When the hydraulic pressure of the lower liquid reaches a certain value, the floating plate 43 is pushed up and the abutting spherical block 8 is pushed into the limiting groove 6. The floating plate 43 begins to float up and presses against another spherical block 8 on the top. During this process, the rising height of the floating plate 43 is equal to the thickness of the conductive layer 441, thereby realizing the alternation of abutment and conduction between each conductive layer 441 and the metal joint 42.
[0028] In this embodiment, a hydraulic reserve chamber 9 having a volume much larger than that of the accommodating cylinder 41 is fixed in the housing 2, the hydraulic reserve chamber 9 is connected to the lower section of the accommodating cylinder 41, the hydraulic reserve chamber 9 is filled with the same liquid as that in the accommodating cylinder 41, a pressure relief valve 10 and a one-way valve 11 for liquid inlet are arranged on the side wall of the hydraulic reserve chamber 9, and the pressure relief valve 10 is connected to a temporary storage tank 13 through a water pipe. When a malfunction occurs in the filter body 1 and a large amount of heat is generated, the hydraulic energy of the liquid exceeds the threshold, the pressure relief valve 10 opens and releases pressure, and the liquid flows into the temporary storage tank 13 through the water pipe, and the one-way valve 11 is used to replenish the liquid.
[0029] The working principle of this embodiment is as follows: this scheme utilizes the thermal expansion and contraction characteristics of liquid. When the filter body 1 is in working state, it will generate heat in the housing 2, causing the surrounding temperature to rise. As the surrounding temperature rises, the liquid in the hydraulic reserve chamber 9 and the lower section of the accommodating cylinder 41 expands due to heat, and the floating plate 43 is squeezed upward by the liquid. When the floating plate 43 rises, it first presses against the lowermost spherical block 8. At this time, the two ends of the lower resistor layer 4411, i.e., the resistor layer 4411 with the largest resistance value, are in contact with the metal joint 42 for conduction. At this time, the rotation of the DC motor 31 is stopped. The speed is relatively low; as the ambient temperature continues to rise, the liquid continues to expand. When the liquid pressure reaches a certain value, the bottom spherical blocks 8 are pushed to be compressed into the limit groove 6, and the floating plate 43 is pushed to continue to float. At this time, the two ends of the middle layer of the resistance layer, that is, the resistance layer 4411 with a smaller resistance value, are in contact with the metal joint 42 for conduction. At this time, the speed of the DC motor 31 increases; when the temperature continues to rise, the floating plate continues to rise and drives the two ends of the upper resistance layer, that is, the resistance layer 4411 with the smallest resistance value, to abut and conduct with the metal joint 42. At this time, the speed of the DC motor 31 increases again. Through the above principle, the DC motor 31 drives the fan blades 32 to rotate, and the hot air in the shell 1 is blown out through the exhaust port for heat dissipation. The higher the temperature in the shell 2, the greater the expansion volume of the liquid, so that the floating plate 43 floats higher, so that the resistance layer 4412 with a lower resistance value is connected to the metal joint 42, so as to accelerate the rotation speed of the shaft of the DC motor 31 and increase the heat dissipation efficiency.
[0030] The above description is only a preferred feasible embodiment of the present utility model, and does not limit the scope of rights of the present utility model. All equivalent changes made using the contents of the present utility model specification and its drawings are included in the scope of rights of the present utility model.
Claims
1. A dense wavelength division multiplexing filter structure, comprising a filter body (1) and a housing (2), wherein the filter body (1) is arranged in the housing (2), and characterized in that: A heat dissipation device (3) is provided in the housing (2) for dissipating heat from the filter body (1); the heat dissipation device (3) comprises a motor (31) and a fan blade (32) fixedly sleeved on the rotating shaft of the motor (31); an exhaust port (5) is provided on the housing (2); A control structure (4) is also provided in the housing (2). The control structure (4) comprises a containing cylinder (41). Metal joints (42) of the same height are provided on both side walls of the containing cylinder (41). The outer sides of the two metal joints (42) are connected in series to an armature circuit where the motor (31) is located. The containing cylinder (41) is filled with liquid. A floating plate (43) floats on the liquid surface. A resistance structure (44) is fixedly connected to the upper surface of the floating plate (43). Two ends of the resistance structure (44) are respectively connected to the inner sides of the two metal joints (42). The floating plate (43) and a side of the containing cylinder (41) filled with liquid form a sealed space. An air pressure balance port is provided on the upper side wall of the containing cylinder (41). The resistance structure (44) changes the resistance value connected to the metal joint (42) according to the floating height of the floating plate (43).
2. A dense wavelength division multiplexing filter structure according to claim 1, characterized in that: The resistance structure (44) comprises a plurality of conductive layers (441) of equal thickness, each conductive layer (441) being arranged in parallel with the floating plate (43), and each conductive layer (441) being arranged in sequence and stacked along the floating direction of the floating plate (43), the conductive layer (441) comprising two insulating layers (4411) and a resistance layer (4412) located between the two insulating layers (4411), the resistance value of each resistance layer (4412) increasing in sequence along the floating direction of the floating plate (43), and two ends of one resistance layer (4412) respectively abutting against two metal joints (42).
3. A dense wavelength division multiplexing filter structure according to claim 1, characterized in that: The accommodating tube (41) is divided into two sections, the upper section of the accommodating tube (41) has a smaller cross-sectional area than the lower section, the metal joint (42) is located in the upper section of the accommodating tube (41), and the floating plate (43) is always located in the lower section of the accommodating tube (41).
4. A dense wavelength division multiplexing filter structure according to claim 2, characterized in that: A plurality of limiting grooves (6) are provided on the side wall of the lower section of the accommodating tube (41) along the floating direction of the floating plate (43), and a telescopic spring (7) is fixedly connected in the limiting groove (6). A spherical block (8) is fixedly provided at one end of the telescopic spring (7) away from the bottom of the limiting groove (6), and at most half of the sphere of the spherical block (8) is exposed outside the limiting groove (6). The elastic moduli of each telescopic spring (7) arranged along the floating direction of the floating plate (43) increase in sequence, and the interval between adjacent limiting grooves (6) is equal to the thickness of each conductive layer (441).
5. The dense wavelength division multiplexing filter structure according to claim 1, characterized in that: A hydraulic reserve chamber (9) having a volume larger than that of the accommodating cylinder (41) is also fixed in the housing (2); the hydraulic reserve chamber (9) is in communication with the lower section of the accommodating cylinder (41); and the hydraulic reserve chamber (9) is filled with the same liquid as that in the accommodating cylinder (41).
6. A dense wavelength division multiplexing filter structure according to claim 5, characterized in that: A pressure relief valve (10) and a one-way valve (11) for liquid inlet are provided on the side wall of the hydraulic reserve chamber (9).
7. A dense wavelength division multiplexing filter structure according to claim 4, characterized in that: A buffer sealing layer (12) is fixedly disposed on the upper side of the floating plate (43) in the accommodating cylinder (41).