Air guide structure, air-core reactor and electrical equipment
By adopting a gradient air guide section and threaded connection structure in the hollow reactor, the problem of poor heat dissipation during the miniaturization process is solved, and more efficient heat dissipation and cooling effects are achieved.
Patent Information
- Application Number
- CN202323403120.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-13
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2033-12-13
AI Technical Summary
In the process of pursuing miniaturization and lightweighting, the distance compression between the fan and the hollow reactor leads to sudden changes in the airflow, resulting in poor heat dissipation effect and local temperature exceeding the allowable use temperature.
The gradient air guide tube section is adopted, and the cross-section gradually becomes smaller along the extension direction of the air guide tube, forming a small and large port end, combining a smooth or arc curved surface transition to avoid vortex flow, and improving through the threaded connection structure and extended air guide tube section. Wind guidance efficiency.
Effectively avoid eddy current generation, improve the heat dissipation effect of hollow reactors, reduce temperature, and reduce airflow loss and noise, and improve production efficiency.
Smart Images
Figure CN222281730U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical equipment, in particular to an air guide structure, a hollow reactor and electrical equipment. Background Art
[0002] In existing electrical equipment, air-core reactors are important electrical components. When working, they generate heat due to coil losses. The heat is generally dissipated by self-cooling or forced air cooling. However, since self-cooling air-core reactors are relatively bulky, they are gradually being replaced by forced air-cooling air-core reactors.
[0003] In the prior art, commonly used hollow reactors require a sufficient and large distance to be reserved between the fan and the wind tunnel of the hollow reactor to avoid sudden changes in airflow and thus avoid the generation of eddy currents. However, this will increase the size and weight of the equipment. If the distance between the fan and the hollow reactor is further compressed due to the requirement for miniaturization and lightweight of electrical equipment, the existing solution will generate eddy currents near the sudden cross-section during gas flow, causing the heat dissipation of the hollow reactor to deteriorate and the local temperature to exceed the allowable operating temperature of the device. Utility Model Content
[0004] The main purpose of the utility model is to provide an air guiding structure, an air-core reactor and an electrical device, aiming to provide an air guiding structure, an air-core reactor and an electrical device which can increase the utilization effect of the fan and improve the heat dissipation effect of the air-core reactor.
[0005] To achieve the above-mentioned purpose, the wind guide structure proposed in the utility model includes: an wind guide cylinder portion, wherein the wind guide cylinder portion is at least partially configured as a gradual wind guide cylinder section, and along the extension direction of the wind guide cylinder, the cross-section of the gradual wind guide cylinder section is gradually reduced to form a relatively small mouth end and a large mouth end at its two ends, respectively, the small mouth end is used to correspond to the air inlet end of the wind cylinder of the hollow inductor, and the large mouth end is used to correspond to the air outlet end of the fan.
[0006] Optionally, the inner wall surface of the gradual air guide tube section is configured as a smooth curved surface.
[0007] Optionally, the inner wall surface of the gradual air guide tube section is arranged in the form of an arc curved surface.
[0008] Optionally, a mounting portion is provided at the large opening end of the air guide cylinder portion, and the mounting portion is used for detachably mounting on an air duct wall panel of the electrical equipment.
[0009] Optionally, the mounting portion comprises an annular mounting plate extending from the periphery of the large-mouth end of the air guide cylinder portion, and the annular mounting plate is mounted on the air duct wall panel of the electrical equipment via a threaded connection structure.
[0010] Optionally, the air guide tube portion further includes an extended air guide tube section connected to the gradual air guide tube section, and the extended air guide tube section is used to be inserted into the air inlet end of the air tube of the air-core reactor.
[0011] The utility model also proposes a hollow reactor, the hollow reactor includes the wind guide structure, the wind guide structure includes: an air guide cylinder portion, the air guide cylinder portion is at least partially configured as a gradual air guide cylinder section, along the extension direction of the air guide cylinder, the cross-section of the gradual air guide cylinder section is gradually reduced to form a relatively small mouth end and a large mouth end at its two ends, the small mouth end is used to correspond to the air inlet end of the air cylinder of the hollow reactor, and the large mouth end is used to correspond to the air outlet end of the fan.
[0012] The utility model also provides an electrical device, the electrical device comprising:
[0013] Electrical equipment housing;
[0014] an air-core reactor, the air-core reactor being arranged in the housing of the electrical equipment; and
[0015] A fan, disposed in the housing of the electrical equipment, and used to blow air toward the air-core reactor;
[0016] Among them, the hollow reactor includes an air guide structure, which is arranged in the housing of the electrical equipment. The small end of the gradual air guide tube section is used to correspond to the air inlet end of the air tube of the hollow reactor, and the large end of the gradual air guide tube section is used to correspond to the air outlet end of the fan.
[0017] Optionally, the air guide cylinder portion further includes an extended air guide cylinder section connected to the gradual air guide cylinder section, the extended air guide cylinder section is used to be inserted into the air inlet end of the air cylinder of the hollow reactor, an annular gap is formed between the extended air guide cylinder section and the air inlet end of the air cylinder of the hollow reactor, the length of the annular gap is L, and the thickness is t, wherein:
[0018] 10mm≤L≤15mm; and / or, 2mm≤t≤5mm.
[0019] Optionally, the fan is installed to rotate along a first direction, and the air outlet of the fan is arranged at a side end of the fan;
[0020] The air cylinder of the air-core reactor is extended along the second direction, and the air outlet end of the fan is arranged corresponding to the air inlet end of the air cylinder of the air-core reactor.
[0021] Optionally, an air duct wall plate is provided between the fan and the air-core reactor, and the air duct wall plate is provided with a mounting hole;
[0022] An annular mounting plate is provided at the large opening end of the air guide tube portion, and the annular mounting plate is connected to the air duct wall plate via a threaded connection structure, and the gradual air guide tube section is at least partially penetrated in the mounting hole.
[0023] In the technical solution of the present utility model, the wind guide structure includes an wind guide cylinder portion, and part of the wind guide cylinder portion is arranged as a gradual wind guide cylinder section, and the cross-section of the gradual wind guide cylinder section gradually becomes smaller along the extension direction of the wind guide cylinder portion, and the fluid transition surface formed presents a smooth transition. In addition, the gradual wind guide cylinder section is formed with a large mouth end and a small mouth end, and the large mouth end is arranged corresponding to the air outlet end of the fan. Therefore, when the fan rotates to form an airflow, the airflow will enter the gradual wind guide cylinder section of the wind guide cylinder portion along the large mouth end. Since the airflow presents a smooth transition through the gradual wind guide cylinder section, the flow velocity difference between the central airflow and the edge airflow is small, which can well avoid the generation of eddy currents, thereby improving the wind guiding efficiency of the wind guide cylinder portion, and introducing the airflow formed by the fan into the wind cylinder of the hollow reactor through the small mouth end, effectively reducing the temperature of the hollow reactor while reducing the loss of airflow. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0025] Figure 1 It is a three-dimensional schematic diagram of an electrical device in the prior art at a certain viewing angle;
[0026] Figure 2 for Figure 1 A three-dimensional schematic diagram of an electrical device in the prior art from another perspective;
[0027] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;
[0028] Figure 4 A three-dimensional schematic diagram of an embodiment of the air guide structure provided by the present invention at a certain viewing angle;
[0029] Figure 5 A three-dimensional schematic diagram of an embodiment of an electrical device provided by the present invention at a certain viewing angle;
[0030] Figure 6 for Figure 5 A three-dimensional schematic diagram of an embodiment of an electrical device provided by the present invention at another viewing angle;
[0031] Figure 7 for Figure 6 A partial enlarged schematic diagram of point B in the middle;
[0032] Figure 8 for Figure 5 Cross-sectional view of the hollow core reactor at point C.
[0033] Description of Figure Numbers:
[0034]
[0035]
[0036] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0038] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0039] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0040] In existing electrical equipment, air-core reactors are important electrical components. When working, they generate heat due to coil losses. The heat is generally dissipated by self-cooling or forced air cooling. However, since self-cooling air-core reactors are relatively bulky, they are gradually being replaced by forced air-cooling air-core reactors.
[0041] In the prior art, commonly used hollow reactors require a sufficient and large distance to be reserved between the fan and the wind tunnel of the hollow reactor to avoid sudden changes in airflow and thus avoid the generation of eddy currents. However, this will increase the size and weight of the equipment. If the distance between the fan and the hollow reactor is further compressed due to the requirement for miniaturization and lightweight of electrical equipment, the existing solution will generate eddy currents near the sudden cross-section during gas flow, causing the heat dissipation of the hollow reactor to deteriorate and the local temperature to exceed the allowable operating temperature of the device.
[0042] To solve the above problems, the utility model proposes an air guide structure, an air-core reactor and an electrical device, aiming to provide an air guide structure, an air-core reactor and an electrical device which can increase the utilization effect of the fan and improve the heat dissipation effect of the air-core reactor. Figures 4 to 8 The present invention is a schematic structural diagram of an embodiment of the wind guide structure, air-core reactor and electrical equipment provided by the present invention.
[0043] Please refer to Figures 1 to 3 As shown in the figure, in the prior art, the air guide structure is arranged on the air duct wall plate, and the wall surface of the air guide structure and the air duct wall plate are arranged at right angles. When the fan rotates and forms airflow, the airflow flows through the air duct wall plate and the wall surface of the air guide structure. Since the airflow on the outside will be blocked by the air duct wall plate, a wind speed difference between the inside airflow and the outside airflow will be formed, and then vortices will be formed at the air duct wall plate and the wall surface of the air guide structure, which will cause the loss of airflow and further reduce the heat dissipation effect of the air-core reactor.
[0044] Therefore, please refer to Figures 4 to 5 The utility model proposes an air guide structure 1000, including an air guide tube portion 1, at least part of which is configured as a gradual air guide tube segment 11. Along the extension direction of the air guide tube, the cross-section of the gradual air guide tube segment 11 is gradually reduced to form a small-mouth end 112 and a large-mouth end 111 at its two ends. The small-mouth end 112 is used to correspond to the air inlet end of the air tube 231 of the air-core reactor, and the large-mouth end 111 is used to correspond to the air outlet end of the fan 22.
[0045] In the present application, the air guide structure 1000 includes an air guide cylinder portion 1, and a portion of the air guide cylinder portion 1 is configured as a gradual air guide cylinder section 11. The cross-section of the gradual air guide cylinder section 11 gradually becomes smaller along the extension direction of the air guide cylinder portion 1, and the fluid transition surface formed presents a smooth transition. In addition, the gradual air guide cylinder section 11 is formed with a large mouth end 111 and a small mouth end 112, and the large mouth end 111 is arranged corresponding to the air outlet end of the fan 22. Therefore, when the fan 22 rotates to form an airflow, the airflow will enter the gradual air guide cylinder section 11 of the air guide cylinder portion 1 along the large mouth end 111. Since the airflow presents a smooth transition through the gradual air guide cylinder section 11, the flow velocity difference between the central airflow and the edge airflow is small, which can well avoid the generation of vortices, thereby improving the air guiding efficiency of the air guide cylinder portion 1, and introducing the airflow formed by the fan 22 through the small mouth end 112 into the air cylinder 231 of the hollow reactor, effectively reducing the temperature of the hollow reactor 23 while reducing the loss of airflow.
[0046] For further information, see Figure 5 The inner wall surface of the gradual air guide tube section 11 is set as a smooth curved surface. In the present embodiment, the gradual air guide tube section 11 presents a smooth curved surface transition. When the fan 22 is running and the airflow flows through the smooth curved surface, the smooth curved surface alleviates the sudden change of the cross-section, so that the airflow can enter the air tube 231 of the hollow reactor along the smooth curved surface, thereby reducing the generation of eddy currents and effectively solving the heat dissipation problem of the hollow reactor 23.
[0047] Furthermore, the inner wall surface of the gradual air guide tube section 11 is set as an arc surface. In the present embodiment, the inner wall surface of the gradual air guide tube section is transitioned through an arc. Compared with other curved surfaces, the advantage of the arc curved surface as a transition is that its shape is smooth and simple. When the fan 22 is running, the airflow flows through the arc curved surface, and the flow velocity difference between the outer airflow and the inner airflow is small, which can avoid the generation of vortexes to the greatest extent, thereby reducing the loss of airflow to a greater extent.
[0048] In addition, see Figure 4 The large end 111 of the air guide tube part 1 is provided with a mounting portion 1111, and the mounting portion 1111 is used for detachable installation on the air duct wall plate 211 of the electrical equipment 2000. Therefore, the air guide tube part 1 can be detachably installed on the air duct wall plate 211 of the electronic equipment. On the one hand, it is convenient to replace the parts when they are damaged. On the other hand, the operation is simple during assembly, which is convenient to speed up the production efficiency of related equipment.
[0049] Further, the mounting portion 1111 includes an annular mounting plate 1111a extending from the periphery of the large-mouth end 111 of the air guide tube portion 1, and the annular mounting plate 1111a is mounted on the air duct wall plate 211 of the electrical device 2000 through a threaded connection structure 1111b. It can be understood that in some other embodiments, snap-on connection, plug-in connection, etc. can also be used, and in the embodiment of the present application, the advantage of using the threaded connection structure 1111b is that the threaded connection is a detachable fixing method with a simple structure and a tight and reliable connection. It can effectively avoid the leakage of airflow while reducing the vibration of the air guide tube portion 1 at the connection, thereby reducing the noise during operation. In addition, the threaded connection is easy to operate, and both disassembly and installation can be easily completed, which can greatly shorten the time of disassembly and installation, and improve production efficiency and the efficiency of component replacement.
[0050] In addition, the air guide tube portion 1 also includes an extended air guide tube segment 12 connected to the gradual air guide tube segment 11. The extended air guide tube segment 12 is used to be inserted into the air inlet end of the wind tube 231 of the hollow reactor. Inserting the extended air guide tube directly into the air inlet segment of the wind tube can effectively reduce the loss of fluid and avoid partial fluid loss due to a certain distance between the extended air guide tube segment 12 and the wind tube. In addition, the extended air guide tube segment 12 can extend into the air inlet end of the wind tube 231 of the hollow reactor, which can also play a role in cooperative installation.
[0051] The utility model further provides an air-core reactor 23 , and the air-core reactor 23 includes the above-mentioned air guide structure 1000 .
[0052] The utility model also proposes an electrical device 2000, which includes an air guide structure 1000. The specific structure of the air guide structure 1000 refers to the above embodiment. Since the electrical device 2000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0053] See also Figures 5 to 8 The electrical equipment further comprises: an electrical equipment housing 21, a fan 22, a hollow reactor 23 and an air guide structure 1000; the fan 22 is arranged in the electrical equipment housing 21; and the hollow reactor 23 is arranged in the electrical equipment housing 21, wherein the hollow reactor 23 comprises an air guide structure 1000, the air guide structure 1000 is arranged in the electrical equipment housing 21, the small end 112 of the gradual air guide tube section 11 is used to correspond to the air inlet end of the air tube 231 of the hollow reactor, and the large end 111 of the gradual air guide tube section 11 is arranged to correspond to the air outlet end of the fan 22. In the housing of the electrical equipment, the fan 22 rotates to provide a continuous cooling airflow, and the air guide structure 1000 conveys the airflow to the air tube 231 of the hollow reactor, which has a cooling effect on the hollow reactor 23.
[0054] Furthermore, the air guide tube portion 1 also includes an extended air guide tube segment 12 connected to the gradient air guide tube segment 11, and the extended air guide tube segment 12 is used to be inserted into the air inlet end of the air tube 231 of the hollow reactor. An annular gap is formed between the extended air guide tube segment 12 and the air inlet end of the air tube 231 of the hollow reactor. The length of the annular gap is L and the thickness is t, wherein: 10mm≤L≤15mm; and / or, 2mm≤t≤5mm. In the present application document, an annular gap is formed at the air inlet end of the extended air guide tube segment 12 and the air tube 231 of the hollow reactor. When the airflow flows from the extended air guide tube segment 12 into the air tube 231 of the hollow reactor, since the length of the annular gap is set at 10mm~15mm, that is, the length of the axial overlapping part between the extended air guide tube segment 12 and the air tube 231 of the hollow reactor is longer, and the thickness of the annular gap is 2mm~5mm, the radial gap between the extended air guide tube segment 12 and the air tube 231 of the hollow reactor is small, and the airflow is difficult to flow out from the annular gap, which can effectively avoid large airflow losses and achieve effective wind guiding and gas transportation effects.
[0055] In addition, in the present application, the thickness of the annular gap is generally greater than or equal to 2 mm and less than or equal to 3 mm, and the maximum thickness does not exceed 5 mm. The smaller the thickness of the annular gap, the less the loss of the airflow during transmission. However, if the thickness is too small, it is easy to cause interference between the extended air guide tube segment 12 and the air tube 231 of the hollow reactor during the subsequent installation process, thereby reducing the assembly efficiency during disassembly and assembly.
[0056] See also Figures 5 and 6 In this application document, the fan 22 is installed to rotate along the first direction, and the air outlet of the fan 22 is arranged at the side end of the fan 22; the air duct 231 of the hollow reactor is extended along the second direction, and the air outlet of the fan 22 is arranged corresponding to the air inlet of the air duct 231 of the hollow reactor. Further, the fan 22 is set as a centrifugal fan 22. The centrifugal fan 22 is based on the principle of converting kinetic energy into potential energy, using a high-speed rotating impeller to accelerate the gas and then change the flow direction. The air volume and air pressure of the centrifugal fan 22 are relatively large, and it is suitable for use in scenarios where the air supply distance is long and the pipeline resistance is large. In this application, the centrifugal fan 22 is installed on the electrical equipment housing 21 along the first direction, and the air outlet of the centrifugal fan 22 is arranged corresponding to the air duct 231 of the hollow reactor. Its advantage is that it can minimize the loss of airflow and improve the cooling efficiency of the hollow reactor 23.
[0057] In addition, in some embodiments, a duct wall panel 211 is provided between the fan 22 and the hollow reactor 23, and the duct wall panel 211 is provided with a mounting hole 2111; the large end 111 of the air guide tube portion 1 is provided with an annular mounting plate 1111a, and the annular mounting plate 1111a is connected to the air duct wall panel 211 by a threaded connection structure 1111b, and the gradient air guide tube section 11 is at least partially penetrated into the mounting hole 2111. In this embodiment, the large end 111 is provided with an annular mounting plate 1111a for installation with the air duct wall panel 211, and the large end 111 of the gradient air guide tube section 11 is arranged close to the fan 22, so that a better air guiding effect can be achieved through the large end 111, and the annular mounting plate 1111a and the air duct wall panel 211 are connected by a threaded connection structure 1111b, which can achieve the effect of convenient and quick disassembly, and the mounting hole 2111 plays a role in coordinating the installation.
[0058] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A wind guide structure, used to connect with an air-core reactor to guide the wind, characterized in that: It includes an air guide tube portion, which is at least partially configured as a gradual air guide tube section. Along the extension direction of the air guide tube, the cross-section of the gradual air guide tube section is gradually reduced to form a relatively small-mouth end and a large-mouth end at its two ends, respectively. The small-mouth end is used to correspond to the air inlet end of the air tube of the hollow inductor, and the large-mouth end is used to correspond to the air outlet end of the fan.
2. The wind guide structure according to claim 1, characterized in that: The inner wall surface of the gradual air guide tube section is arranged in a smooth curved surface.
3. The wind guide structure according to claim 2, characterized in that: The inner wall surface of the gradual air guide tube section is arranged in the form of an arc curved surface.
4. The wind guide structure according to claim 1, characterized in that: A mounting portion is provided at the large opening end of the air guide cylinder portion, and the mounting portion is used for being detachably mounted on an air duct wall plate of an electrical device.
5. The wind guide structure according to claim 4, characterized in that: The mounting portion comprises an annular mounting plate extending from the periphery of the large opening end of the air guide cylinder portion, and the annular mounting plate is mounted on the air duct wall plate of the electrical equipment through a threaded connection structure.
6. The wind guide structure according to claim 1, characterized in that: The air guide tube portion further includes an extended air guide tube section connected to the gradual air guide tube section, and the extended air guide tube section is used to be inserted into the air inlet end of the air tube of the air-core reactor.
7. An air-core reactor, characterized in that: It comprises the wind guiding structure as described in any one of claims 1 to 6.
8. An electrical device, characterized in that: include: Electrical equipment housing; The air-core reactor according to claim 7, wherein the air-core reactor is arranged in the housing of the electrical equipment; as well as, A fan, disposed in the housing of the electrical equipment, and used to blow air toward the air-core reactor; Among them, the hollow reactor includes an air guide structure, which is arranged in the housing of the electrical equipment. The small end of the gradual air guide tube section is used to correspond to the air inlet end of the air tube of the hollow reactor, and the large end of the gradual air guide tube section is used to correspond to the air outlet end of the fan.
9. The electrical device according to claim 8, characterized in that The air guide tube portion further includes an extended air guide tube section connected to the gradual air guide tube section, the extended air guide tube section is used to be inserted into the air inlet end of the air tube of the hollow reactor, an annular gap is formed between the extended air guide tube section and the air inlet end of the air tube of the hollow reactor, the length of the annular gap is L, and the thickness is t, wherein: 10mm≤L≤15mm; and / or, 2mm≤t≤5mm.
10. The electrical device according to claim 8, characterized in that The fan is installed to rotate along a first direction, and the air outlet of the fan is arranged at a side end of the fan; The air cylinder of the air-core reactor is extended along the second direction, and the air outlet end of the fan is arranged corresponding to the air inlet end of the air cylinder of the air-core reactor.
11. The electrical device according to claim 10, characterized in that An air duct wall plate is provided between the fan and the air-core reactor, and the air duct wall plate is provided with a mounting hole; An annular mounting plate is provided at the large opening end of the air guide tube portion, and the annular mounting plate is connected to the air duct wall plate via a threaded connection structure, and the gradual air guide tube section is at least partially penetrated in the mounting hole.