CN213784021U - Electromagnetic shielding structure, electric device and air purifier - Google Patents
Electromagnetic shielding structure, electric device and air purifier Download PDFInfo
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- CN213784021U CN213784021U CN202022683715.5U CN202022683715U CN213784021U CN 213784021 U CN213784021 U CN 213784021U CN 202022683715 U CN202022683715 U CN 202022683715U CN 213784021 U CN213784021 U CN 213784021U
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Abstract
The utility model relates to an electromagnetic shielding structure, an electrical device and an air purifier, wherein the electromagnetic shielding structure comprises a first shielding piece, and the first shielding piece comprises a shielding cavity with a first opening on one side, and the shielding cavity is used for accommodating an accommodating part with a voltage doubling circuit module from the opening; the second shielding piece is positioned on one side of the first shielding piece, and the second shielding piece is used for being attached to one side of the control module, wherein the mounting part deviates from the control module. The utility model provides an electromagnetic shield structure reaches, electrical apparatus and air purifier forms a non-closed shield cover through first shield, can seal the interference signal that voltage doubling circuit module produced in finite space to further increase shielding isolation area through setting up the second shield, thereby reinforcing shielding effect, so, the influence of voltage doubling circuit module to system EMC that can significantly reduce.
Description
Technical Field
The utility model relates to an air purification device technical field especially relates to an electromagnetic shield structure, electrical apparatus and air purifier.
Background
In recent years, the air quality problem is more and more concerned by people, and air purification products are greatly developed along with the market demand.
One common method for air purification treatment is to use high voltage of thousands of volts or tens of kilovolts for dust collection and sterilization, and the high voltage generated by the voltage doubling circuit composed of capacitance diodes is widely applied to air purification treatment due to the advantages of low cost and high efficiency.
However, under the periodic conduction cut-off of the voltage doubling circuit diode, the high-frequency current spike existing in the reverse recovery of the diode can generate periodic high-frequency interference on the whole circuit, and therefore the EMC (electromagnetic compatibility) performance of the system can be affected.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide an electromagnetic shielding structure, an electrical apparatus, and an air purifier capable of preventing the voltage doubling circuit from affecting the EMC performance of the system, in order to solve the problem that the EMC performance of the system is affected by the high voltage generated by the conventional voltage doubling circuit.
An aspect of the utility model provides an electromagnetic shielding structure for the voltage doubling circuit module on the shielding electrical apparatus body, the electrical apparatus body still include the casing and with the control module that voltage doubling circuit module links to each other, the casing is including acceping the portion of acceping and the installation of voltage doubling circuit module control module's installation department, electromagnetic shielding structure includes:
the first shielding piece comprises a shielding cavity with a first opening on one side, and the shielding cavity is used for accommodating the accommodating part from the opening;
the second shielding piece is positioned on one side of the first shielding piece, and the second shielding piece is used for being attached to one side of the control module, wherein the mounting part deviates from the control module.
In one embodiment, the first shield comprises a first hot-dip zinc metal piece, and/or the second shield comprises a second hot-dip zinc metal piece.
In one embodiment, the second shielding part comprises a shielding plate, and the shielding plate is used for being attached to one side surface of the mounting part, which faces away from the control module.
In one embodiment, the inner contour of the shielding cavity matches the outer contour of the receiving portion.
In one embodiment, the electromagnetic shielding structure includes at least two first connecting portions disposed at two opposite sides of the first opening, and the electromagnetic shielding structure is connected to the electrical apparatus body through the at least two first connecting portions.
Another aspect of the present invention provides an electrical apparatus, which includes an electrical apparatus body and the electromagnetic shielding structure;
the electric appliance device body comprises a shell, a voltage doubling circuit module and a control module connected with the voltage doubling circuit module, wherein the shell comprises an accommodating part for accommodating the voltage doubling circuit module and an installation part for installing the control module.
In one embodiment, the receiving portion protrudes outward from a side of the mounting portion facing away from the control module.
In one embodiment, the receiving portion includes a receiving cavity having a second opening on one side, and the voltage-doubling circuit module is received in the receiving cavity from the second opening.
In one embodiment, the electromagnetic shielding structure is detachably mounted to the housing.
In one embodiment, the electromagnetic shielding structure includes at least two first connecting portions disposed on opposite sides of the first opening;
the shell comprises at least two third connecting parts, and the electric appliance device further comprises at least two second connecting pieces, wherein each second connecting piece is used for connecting a corresponding first connecting part and a corresponding third connecting part.
In one embodiment, the second connector includes a second threaded member, and the first and third connecting portions each include a second threaded hole that mates with the second threaded member.
In one embodiment, the voltage doubling circuit module includes a first ground portion, the control module includes a second ground portion, the electromagnetic shielding structure includes a third ground portion, and the first ground portion, the second ground portion, and the third ground portion are all connected to an external ground through at least one of the second connecting members.
The utility model also provides an aspect, still provide an air purifier, including foretell electrical apparatus.
Above-mentioned electromagnetic shield structure, electrical apparatus and electrical apparatus, form a non-closed shield cover through first shielding piece, can seal the interference signal that voltage doubling circuit module produced in finite space, through setting up the second shielding piece and the installation department and deviating from one side laminating of control module, can be when not influencing control module's performance, the make full use of space, further increase shielding isolation area, thereby reinforcing shielding effect, so, the influence of voltage doubling circuit module to system EMC has significantly reduced.
In addition, because the electromagnetic shield structure is whole non-enclosed, and for the closed shield cover of traditional whole electrical apparatus body of encircleing, can reduce manufacturing process, practice thrift the cost of manufacture, and, because air purifier's circuit relates to switching power supply lamp power device, have obvious requirement to the temperature rise, closed shield cover is unfavorable for the heat dissipation of components and parts, thereby influence the performance of electrical apparatus body, and the electromagnetic shield structure of this application, for non-enclosed structure, has the heat dissipation opening, is favorable to the heat dissipation of components and parts, thereby reduce the performance influence to the electrical apparatus body.
Drawings
Fig. 1 is a schematic structural view of an electrical apparatus body according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the electrical device body of FIG. 1 from another perspective;
fig. 3 is a schematic structural diagram of an electromagnetic shielding structure according to an embodiment of the present invention;
fig. 4 is a schematic structural view of another perspective of the electromagnetic shielding structure shown in fig. 3;
fig. 5 is a schematic view illustrating a process of installing the electromagnetic shielding structure in the electrical apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.
Fig. 1 shows a schematic structural diagram of an electrical apparatus body in an embodiment of the present invention; FIG. 2 is a schematic structural view of the electrical device body of FIG. 1 from another perspective; fig. 3 is a schematic structural diagram of an electromagnetic shielding structure according to an embodiment of the present invention; fig. 4 shows a schematic structural view of another perspective of the electromagnetic shielding structure shown in fig. 3. For the purpose of illustration, the drawings show only the structures associated with embodiments of the invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides an electromagnetic shielding structure 100 for shielding a voltage-doubling circuit module 211 on an electrical apparatus body 210, where the electrical apparatus body 210 further includes a housing 212 and a control module 213 connected to the voltage-doubling circuit module 211, and the housing 212 includes an accommodating portion 2121 for accommodating the voltage-doubling circuit module 211 and an installation portion 2122 for installing the control module 213. Specifically, the shielded electrical device body 210 may be a part of electrical equipment of the air purifier, and more specifically, the shielded electrical device body 210 is an electrical box.
Referring to fig. 3 and 4, the electromagnetic shielding structure 100 includes a first shielding member 10 and a second shielding member 20, the first shielding member 10 includes a shielding cavity 12 having a first opening 11 on one side, the shielding cavity 12 is used for receiving the receiving portion 2121 from the first opening 11, the second shielding member 20 is located on one side of the first shielding member 10, and the second shielding member 20 is used for being attached to one side of the mounting portion 2122 away from the control module 213. Preferably, the second shielding member 20 is connected to one side of the first shielding member 10, so that the first shielding member 10 and the second shielding member 20 can be integrally mounted on the electrical device body 210, facilitating the assembly and disassembly. In other embodiments, the first shielding member 10 and the second shielding member 20 may be separately disposed, and are not limited herein.
Form a non-enclosed shield cover through first shielding 10, can seal the interference signal that voltage doubling circuit module 211 produced in finite space, through setting up the laminating of one side that second shielding 20 and installation department 2122 deviate from control module 213, can be when not influencing control module 213's performance, make full use of space, further increase shielding isolation area, thereby reinforcing shielding effect, so, the influence of voltage doubling circuit module 211 to system EMC has significantly reduced.
In addition, because electromagnetic shielding structure 100 is whole non-enclosed, and for the closed shield cover of whole electrical installation body 210 of traditional encirclement, can reduce the manufacture craft, practice thrift the cost of manufacture, and, because air purifier's circuit relates to switching power supply lamp power device, have obvious requirement to the temperature rise, closed shield cover is unfavorable for the heat dissipation of components and parts, thereby influence electrical installation body 210's performance, and electromagnetic shielding structure 100 of this application, for non-enclosed structure, has the heat dissipation opening, is favorable to the heat dissipation of components and parts, thereby reduce the performance influence to electrical installation body 210.
In some embodiments, the first shield 10 comprises a first hot-dip zinc metal piece, in other embodiments, the second shield 20 comprises a second hot-dip zinc metal piece, in other embodiments, the first shield 10 comprises a first hot-dip zinc metal piece, and the second shield 20 comprises a second hot-dip zinc metal piece. The hot zinc plating metal piece is used as a shielding piece, the hot zinc plating material on the hot zinc plating metal piece can be well metallurgically combined with the metal piece, so that the durability of the hot zinc plating material is improved, in addition, the toughness of the metal piece can also be improved by the hot zinc plating material, and the mechanical damage of the shell 212, the voltage doubling circuit module 211 and the control module 213 from the outside can be avoided.
In some embodiments, the second shield 20 comprises a shield plate for conforming to a side surface of the mount 2122 facing away from the control module 213. By providing the shielding plate, the area of the second shielding member 20 and the area of the mounting portion 2122 away from the control module 213 can be increased while the occupied space of the electromagnetic shielding structure 100 is not increased, so that the shielding isolation area is increased, and the shielding effect is enhanced.
As shown in fig. 5, in some embodiments, the shield cavity 12 has an internal profile that matches the external profile of the housing 2121. Thus, the increase of the occupied space of the electromagnetic shielding structure 100 is avoided while the shielding effect is ensured.
Referring to fig. 3 again, in some embodiments, the electromagnetic shielding structure 100 includes at least two first connecting portions 30, the at least two first connecting portions 30 are disposed at two opposite sides of the first opening 11, and the electromagnetic shielding structure 100 is connected to the electrical apparatus body 210 through the at least two first connecting portions 30. Specifically, at least two first connecting portions 30 are provided on the first shield 10. By disposing at least two first connecting portions 30 on two opposite sides of the first opening 11, the reliability of connection between the electromagnetic shielding structure 100 and the electrical apparatus body 210 can be improved, and the shielding effect of the electromagnetic shielding structure 100 can be ensured.
Specifically, the electromagnetic shielding structure 100 includes two first connecting portions 30, and the two first connecting portions 30 are disposed at two opposite sides of the first opening 11 along the longitudinal direction thereof.
Referring to fig. 5 again, based on the same inventive concept, the present invention further provides an electrical apparatus 200, which includes an electrical apparatus body 210 and the electromagnetic shielding structure 100.
Referring to fig. 1 and 2 again, the electrical device body 210 includes a housing 212, a voltage-doubling circuit module 211, and a control module 213 connected to the voltage-doubling circuit module 211, wherein the housing 212 includes a receiving portion 2121 for receiving the voltage-doubling circuit module 211, and an installation portion 2122 for installing the control module 213. Specifically, the control module 213 includes a PCB board.
In some embodiments, the receiver 2121 projects outwardly from a side of the mounting portion 2122 facing away from the control module 213. Thus, the position relationship between the receiving portion 2121 and the mounting portion 2122 is favorable for the first shielding element 10 of the electromagnetic shielding structure 100 to form an open shielding cover to enclose the interference signal generated by the voltage doubling circuit module 211 in a limited space. Specifically, the receiving portion 2121 protrudes outward from the mounting portion 2122 away from the side of the control module 213, and is perpendicular to the extending direction of the mounting portion 2122.
In some embodiments, the receiving portion 2121 includes a receiving cavity having a second opening on one side, and the voltage doubling circuit module 211 is received in the receiving cavity from the second opening. The accommodating cavity with the second opening is arranged, so that the voltage doubling circuit module 211 can be mounted more conveniently.
In some embodiments, the electrical device body 210 further includes an epoxy resin filled in the receiving cavity, and the voltage doubling circuit module 211 is encapsulated in the receiving cavity by the epoxy resin. Since the epoxy resin has excellent adhesiveness, sealing property, heat resistance, and insulating property, the operation stability of the voltage doubler circuit module 211 is improved by filling the epoxy resin to encapsulate the voltage doubler circuit module 211 in the housing cavity.
In some embodiments, the mounting portion 2122 has a plate shape, so that the fitting area between the second shielding element 20 and the mounting portion 2122 can be increased, and the shielding effect can be improved.
In some embodiments, the mounting portion 2122 includes a second connection portion 2123, and the control module 213 is mounted on the mounting portion 2122 by the second connection portion 2123. Specifically, the electrical device 200 includes a first connector for connecting the control module 213 and the second connector 2123. More specifically, the first connecting portion includes a first screw, and the control module 213 and the second connecting portion 2123 each include a first screw hole engaged with the first screw.
In some embodiments, the electromagnetic shielding structure 100 is removably mounted to the housing 212. By providing an electromagnetic shielding structure 100 that is removably mounted to the housing 212, subsequent replacement or inspection may be facilitated.
Referring to fig. 1 and fig. 3 again, in some embodiments, the magnetic shielding structure 100 includes at least two first connecting portions 30, the at least two first connecting portions 30 are disposed on two opposite sides of the first opening 11, the housing 212 includes at least two third connecting portions 2124, and the electrical device 200 further includes at least two second connecting members, each of the second connecting members is used for connecting a corresponding first connecting portion 30 and a corresponding third connecting portion 2124. Specifically, at least two third connecting portions 2124 are disposed at opposite sides of the second opening. In this way, by providing at least two second connecting members to connect the at least two first connecting portions 30 and the at least two third connecting portions 2124, the magnetic shielding structure 100 and the housing 212 can be reliably connected, and the shielding effect can be further ensured.
Preferably, the second connector includes a second threaded member, and the first and third connecting portions 30 and 2124 each include a second threaded bore that mates with the second threaded member. The mode that cooperates fixedly through second screw and second screw hole is simple, and makes things convenient for the dismouting.
In some embodiments, the voltage doubling circuit module 211 includes a first ground portion, the control module 213 includes a second ground portion, the electromagnetic shielding structure 100 includes a third ground portion, and the first ground portion, the second ground portion, and the third ground portion are all connected to the external ground through at least one second connection member. Thus, the grounding connection of the voltage doubling circuit module 211, the control module 213 and the electromagnetic shielding structure 100 can be simplified, and the shielding of the voltage doubling circuit module 211 by the electromagnetic shielding structure 100 can be started through the grounding connection.
Based on the same inventive concept, the utility model also provides an air purifier, including above-mentioned electrical apparatus 200.
The embodiment of the utility model provides an electromagnetic shield structure 100, electrical apparatus 200, air purifier have following beneficial effect:
form a non-enclosed shield cover through first shielding 10, can seal the interference signal that voltage doubling circuit module 211 produced in finite space, through setting up the laminating of one side that second shielding 20 and installation department 2122 deviate from control module 213, can be when not influencing control module 213's performance, make full use of space, further increase shielding isolation area, thereby reinforcing shielding effect, so, the influence of voltage doubling circuit module 211 to system EMC has significantly reduced.
In addition, because electromagnetic shielding structure 100 is whole non-enclosed, and for the closed shield cover of whole electrical installation body 210 of traditional encirclement, can reduce the manufacture craft, practice thrift the cost of manufacture, and, because air purifier's circuit relates to switching power supply lamp power device, have obvious requirement to the temperature rise, closed shield cover is unfavorable for the heat dissipation of components and parts, thereby influence electrical installation body 210's performance, and electromagnetic shielding structure 100 of this application, for non-enclosed structure, has the heat dissipation opening, is favorable to the heat dissipation of components and parts, thereby reduce the performance influence to electrical installation body 210.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (13)
1. The utility model provides an electromagnetic shield structure (100) for shielding voltage doubling circuit module (211) on electrical apparatus body (210), electrical apparatus body (210) still include casing (212) and with control module (213) that voltage doubling circuit module (211) link to each other, casing (212) are including acceping portion (2121) and the installation of voltage doubling circuit module (211) installation portion (2122) of control module (213), its characterized in that, electromagnetic shield structure (100) includes:
a first shield (10) comprising a shield cavity (12) having a first opening (11) at one side, the shield cavity (12) being adapted to receive the receiving portion (2121) from the first opening (11);
and the second shielding piece is positioned on one side of the first shielding piece (10), and the second shielding piece is used for being attached to one side, deviating from the control module (213), of the mounting part (2122).
2. Electromagnetic shielding structure (100) according to claim 1, characterized in that said first shield (10) comprises a first hot-dip zinc metal element and/or said second shield comprises a second hot-dip zinc metal element.
3. Electromagnetic shielding structure (100) according to claim 1, wherein the second shielding comprises a shielding plate for fitting with a side surface of the mounting portion (2122) facing away from the control module (213).
4. Electromagnetic shielding structure (100) according to claim 1, characterized in that the shielding cavity (12) has an inner contour shape matching the outer contour shape of the housing (2121).
5. The electromagnetic shielding structure (100) according to claim 1, wherein the electromagnetic shielding structure (100) comprises at least two first connecting portions (30), at least two first connecting portions (30) are disposed at opposite sides of the first opening (11), and the electromagnetic shielding structure (100) is connected to the electrical apparatus body (210) through the at least two first connecting portions (30).
6. An electrical device (200) comprising an electrical device body (210) and an electromagnetic shielding structure (100) according to any one of claims 1 to 5;
the electrical device body (210) comprises a shell (212), a voltage doubling circuit module (211) and a control module (213) connected with the voltage doubling circuit module (211), wherein the shell (212) comprises a containing part (2121) for containing the voltage doubling circuit module (211) and an installation part (2122) for installing the control module (213).
7. The electrical device (200) of claim 6, wherein the receiving portion (2121) protrudes outward from a side of the mounting portion (2122) facing away from the control module (213).
8. The electrical device (200) of claim 6, wherein the receiving portion (2121) comprises a receiving cavity having a second opening at one side, and the voltage doubling circuit module (211) is received in the receiving cavity from the second opening.
9. The electrical device (200) of claim 6, wherein the electromagnetic shielding structure (100) is removably mounted to the housing (212).
10. The electrical apparatus (200) according to claim 6, wherein the electromagnetic shielding structure (100) comprises at least two first connection portions (30), at least two of the first connection portions (30) being arranged on opposite sides of the first opening (11);
the housing (212) comprises at least two third connecting parts (2124), and the electrical device (200) further comprises at least two second connecting parts, wherein each second connecting part is used for connecting a corresponding first connecting part (30) and a corresponding third connecting part (2124).
11. The electrical device (200) of claim 10, wherein the second connector comprises a second threaded member, and wherein the first connection portion (30) and the third connection portion (2124) each comprise a second threaded bore that mates with the second threaded member.
12. The electrical apparatus (200) of claim 10, wherein the voltage doubling circuit module (211) comprises a first ground, the control module (213) comprises a second ground, and the electromagnetic shielding structure (100) comprises a third ground, and the first ground, the second ground, and the third ground are all connected to an external ground through at least one of the second connectors.
13. An air purifier, characterized in that it comprises an electrical device (200) according to any one of claims 6 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022683715.5U CN213784021U (en) | 2020-11-19 | 2020-11-19 | Electromagnetic shielding structure, electric device and air purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022683715.5U CN213784021U (en) | 2020-11-19 | 2020-11-19 | Electromagnetic shielding structure, electric device and air purifier |
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| Publication Number | Publication Date |
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| CN213784021U true CN213784021U (en) | 2021-07-23 |
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| CN202022683715.5U Active CN213784021U (en) | 2020-11-19 | 2020-11-19 | Electromagnetic shielding structure, electric device and air purifier |
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| CN (1) | CN213784021U (en) |
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