Filter assembly, circuit board and household appliance

Abstract

The utility model discloses a filter assembly, circuit board and domestic appliance, filter assembly includes base, common mode inductance and first electric capacity, base is used as support, common mode inductance includes the magnetic core of installation in base and the first inductance winding and second inductance winding of winding on the magnetic core, first electric capacity sets up at the side of base, and with the pin of first inductance winding and the pin of second inductance winding electricity is connected. Through setting up base, common mode inductance and first electric capacity combination integration together, base fixed common mode inductance's magnetic core, first electric capacity installs at the side of base, and directly with the pin of first inductance winding and second inductance winding of winding on the magnetic core realizes electricity connection, makes common mode inductance with the connecting line between first electric capacity shorter, thereby can reduce parasitic inductance, reduces the problem that resonance brings, the integration of filter assembly is higher, need not set up the electricity connection connecting line between inductance and electric capacity on the circuit board, can satisfy miniaturization, light weight requirement.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, and in particular to a filter component, circuit board and household appliance. Background Technology

[0002] With the development of variable frequency technology, electromagnetic interference problems are becoming increasingly prominent due to factors such as the inductive load of compressors, the inductive load of fans, and the continuous increase of PFC carrier frequency.

[0003] Currently, circuit boards for household appliances typically include common-mode inductors to suppress common-mode electromagnetic interference (EMI), ensuring signal integrity and electromagnetic compatibility of electronic devices. They also typically include X or Y capacitors to suppress differential-mode and common-mode interference, ensuring safe circuit operation. However, this also prevents circuit boards from meeting miniaturization and weight reduction requirements. Furthermore, long traces between inductors and capacitors on the circuit board can introduce parasitic inductance and resonance problems. Utility Model Content

[0004] The purpose of this invention is to solve at least one of the technical problems existing in the prior art, and to provide a filter component, circuit board and household appliance that can meet the requirements of miniaturization and lightweighting, and reduce parasitic inductance and problems caused by resonance.

[0005] In a first aspect, this utility model embodiment provides a filtering component, including a base, a common-mode inductor, and a first capacitor, wherein: The base serves as a support; The common-mode inductor includes a magnetic core mounted on the base and a first inductor winding and a second inductor winding wound on the magnetic core. The first capacitor is disposed on the side of the base and is electrically connected to the pins of the first inductor winding and the pins of the second inductor winding.

[0006] The filtering component provided according to the embodiments of this utility model has at least the following beneficial effects: by setting a base to integrate the common-mode inductor and the first capacitor together, the base fixes the magnetic core of the common-mode inductor, and the first capacitor is installed on the side of the base and directly connected to the pins of the first inductor winding and the second inductor winding wound on the magnetic core, so that the electrical connection trace between the common-mode inductor and the first capacitor is shorter, thereby reducing parasitic inductance and reducing problems caused by resonance; the filtering component has a high degree of integration, and there is no need to set the electrical connection trace between the inductor and the capacitor on the circuit board, which can meet the requirements of miniaturization and lightweight.

[0007] According to some embodiments of the present invention, the filtering component includes a first inductor winding including a first pin and a second pin, and a second inductor winding including a third pin and a fourth pin. The first pin and the third pin extend from the front side of the base to the bottom of the base, and the second pin and the fourth pin extend from the rear side of the base to the bottom of the base.

[0008] According to some embodiments of the present invention, the filtering component has a first groove on the front side of the base for fixing the first pin and the third pin, and a second groove on the rear side for fixing the second pin and the fourth pin.

[0009] According to some embodiments of the present invention, the first capacitor in the filtering component is an X capacitor.

[0010] According to some embodiments of the present invention, the filtering component is provided with two X capacitors, namely a first X capacitor and a second X capacitor. The first X capacitor is disposed on the front side of the base and is welded to the first pin and the third pin respectively. The second X capacitor is disposed on the rear side of the base and is welded to the second pin and the fourth pin respectively.

[0011] According to some embodiments of the present invention, the first capacitor in the filtering component is a Y capacitor.

[0012] According to some embodiments of the present invention, the filter component is provided with four Y capacitors, namely a first Y capacitor, a second Y capacitor, a third Y capacitor and a fourth Y capacitor. The first Y capacitor and the second Y capacitor are disposed on the front side of the base, and the first pin, the first Y capacitor, the second Y capacitor and the third pin are sequentially soldered together; The third Y capacitor and the fourth Y capacitor are disposed on the rear side of the base, and the second pin, the third Y capacitor, the fourth Y capacitor and the fourth pin are sequentially soldered together.

[0013] According to some embodiments of the present invention, a first connecting piece is provided between the first Y capacitor and the second Y capacitor, and the first Y capacitor and the second Y capacitor are respectively welded to the first connecting piece; a second connecting piece is provided between the third Y capacitor and the fourth Y capacitor, and the third Y capacitor and the fourth Y capacitor are respectively welded to the second connecting piece.

[0014] According to some embodiments of the present invention, the filtering component provided includes a first connecting piece and a second connecting piece, both of which are provided with plug-in pins facing downward toward the base.

[0015] According to some embodiments of the present invention, the filter component includes a circular magnetic core and an outer surface paint layer wrapped around the magnetic core. The magnetic core is made of three layers of magnetic materials stacked sequentially: a first manganese-zinc ferrite layer, an amorphous material layer, and a second manganese-zinc ferrite layer.

[0016] According to some embodiments of the present invention, the first inductor winding and the second inductor winding are made of copper-aluminum alloy flat wire.

[0017] This utility model embodiment also provides a filtering component, including a base, a common-mode inductor, a first X capacitor, a second X capacitor, a first Y capacitor, a second Y capacitor, a third Y capacitor, and a fourth Y capacitor, wherein: The base serves as a support; The common-mode inductor includes a magnetic core mounted on the base and a first inductor winding and a second inductor winding wound on the magnetic core; the first inductor winding includes a first pin and a second pin, the second inductor winding includes a third pin and a fourth pin, the first pin and the third pin extend from the front side of the base to the bottom of the base, and the second pin and the fourth pin extend from the rear side of the base to the bottom of the base. The first X capacitor is disposed on the front side of the base and is soldered to the first pin and the third pin respectively; The second X capacitor is disposed on the rear side of the base and is soldered to the second pin and the fourth pin respectively; The first Y capacitor and the second Y capacitor are disposed on the front side of the base, and the first pin, the first Y capacitor, the second Y capacitor and the third pin are sequentially soldered together; The third Y capacitor and the fourth Y capacitor are disposed on the rear side of the base, and the second pin, the third Y capacitor, the fourth Y capacitor and the fourth pin are sequentially soldered together.

[0018] According to some embodiments of the present invention, the first X capacitor is located above the first Y capacitor and the second Y capacitor; the second X capacitor is located above the third Y capacitor and the fourth Y capacitor.

[0019] Secondly, this utility model provides a circuit board including the filtering component described in the first aspect embodiment above.

[0020] The circuit board provided according to the embodiments of this utility model has at least the following beneficial effects: by setting a base in the filter component to integrate the common mode inductor and the first capacitor together, the base fixes the magnetic core of the common mode inductor, and the first capacitor is installed on the side of the base and directly connected to the pins of the first inductor winding and the second inductor winding wound on the magnetic core, so that the electrical connection trace between the common mode inductor and the first capacitor is shorter, thereby reducing parasitic inductance and reducing problems caused by resonance; the filter component has a high degree of integration, and there is no need to set the electrical connection trace between the inductor and the capacitor on the circuit board, which can meet the requirements of miniaturization and lightweighting.

[0021] Thirdly, this utility model provides a household appliance that includes the filter component described in the first aspect embodiment above, or the circuit board described in the second aspect embodiment above.

[0022] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0023] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the overall structure of the filter component provided in Embodiment 1 of this utility model; Figure 2 This is a front view of the filtering component provided in Embodiment 1 of this utility model; Figure 3 This is a rear view of the filtering component provided in Embodiment 1 of this utility model; Figure 4 This is a left view of the filtering component provided in Embodiment 1 of this utility model; Figure 5 This is a right view of the filtering component provided in Embodiment 1 of this utility model; Figure 6 This is a top view of the filtering component provided in Embodiment 1 of this utility model; Figure 7 This is a bottom view of the filter component provided in Embodiment 1 of this utility model; Figure 8 This is the equivalent circuit diagram of the filter component provided in Embodiment 1 of this utility model; Figure 9 This is the equivalent circuit diagram of the filter component provided in Embodiment 2 of this utility model; Figure 10 This is the equivalent circuit diagram of the filter component provided in Embodiment 3 of this utility model; Figure 11 This is a schematic diagram of the internal structure of the magnetic core of the filter component provided in this embodiment of the present invention. Detailed Implementation

[0025] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0026] In the description of the embodiments of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number, while "above," "below," "within," etc. are understood to include the stated number. "At least one" refers to one or more, and "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or multiple items. If "first," "second," etc., are used in the description, they are only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0027] It should be noted that the terms "setting," "installing," and "connecting" in the embodiments of this utility model should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of the above terms in the embodiments of this utility model in conjunction with the specific content of the technical solution. For example, the term "connection" can be a mechanical connection, an electrical connection, or a connection that allows for mutual communication; it can be a direct connection or an indirect connection through an intermediate medium.

[0028] It should be noted that the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] With the development of inverter technology, factors such as the increasing inductive loads of compressors and fans, and the continuously increasing carrier frequency of PFCs, have made electromagnetic interference (EMI) problems more prominent. Currently, circuit boards in household appliances typically include common-mode inductors to suppress common-mode electromagnetic interference (EMI), ensuring signal integrity and electromagnetic compatibility, and X or Y capacitors to suppress differential-mode and common-mode interference, ensuring safe circuit operation. However, this also means that circuit boards cannot meet the requirements for miniaturization and weight reduction, and long traces between inductors and capacitors on the circuit board can also lead to parasitic inductance and resonance problems.

[0030] Based on this, the present invention provides a filter component, circuit board and household appliance that can meet the requirements of miniaturization and lightweighting, and reduce parasitic inductance and problems caused by resonance.

[0031] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0032] A first aspect of this utility model provides a filtering component, including a base 100, a common-mode inductor 200, and a first capacitor, wherein: Base 100 serves as a support; The common mode inductor 200 includes a magnetic core 210 mounted on the base 100 and a first inductor winding 220 and a second inductor winding 230 wound on the magnetic core 210; specifically, the magnetic core 210 is annular and vertically fixed on the base 100. The first capacitor is disposed on the side of the base 100 and is electrically connected to the pins of the first inductor winding 220 and the pins of the second inductor winding 230.

[0033] Specifically, a schematic diagram of the overall structure of the filtering component provided in one embodiment of this utility model is shown below. Figure 1 As shown, the equivalent circuit diagram of the filtering component provided in one embodiment of this utility model is shown below. Figure 8 As shown. (Refer to...) Figure 1 and Figure 8 The first capacitor is a Y capacitor. There are four Y capacitors on the base 100, namely the first Y capacitor C1, the second Y capacitor C2, the third Y capacitor C3, and the fourth Y capacitor C4. The first Y capacitor C1 and the second Y capacitor C2 are located on the front side of the base 100, and the first pin 221, the first Y capacitor C1, the second Y capacitor C2, and the third pin 231 are electrically connected in sequence. The third Y capacitor C3 and the fourth Y capacitor C4 are located on the rear side of the base 100, and the second pin 222, the third Y capacitor C3, the fourth Y capacitor C4, and the fourth pin 232 are electrically connected in sequence.

[0034] According to the filtering component provided in this embodiment of the present invention, a common-mode inductor 200 and a first capacitor are integrated together by setting a base 100. The base 100 fixes the magnetic core 210 of the common-mode inductor 200. The first capacitor is installed on the side of the base 100 and is directly electrically connected to the pins of the first inductor winding 220 and the second inductor winding 230 wound on the magnetic core 210. This makes the electrical connection trace between the common-mode inductor 200 and the first capacitor shorter, thereby reducing parasitic inductance and reducing problems caused by resonance. The filtering component has a high degree of integration and does not require setting electrical connection traces between the inductor and the capacitor on the circuit board, which can meet the requirements of miniaturization and lightweighting.

[0035] Figures 2 to 7 These are six side views of the filtering component provided in this embodiment of the utility model. (Refer to...) Figures 2 to 7 In some embodiments of the present invention, the filtering component provided includes a first inductor winding 220 including a first pin 221 and a second pin 222, and a second inductor winding 230 including a third pin 231 and a fourth pin 232. The first pin 221 and the third pin 231 extend from the front side of the base 100 to the bottom of the base 100, and the second pin 222 and the fourth pin 232 extend from the rear side of the base 100 to the bottom of the base 100.

[0036] In this embodiment, by extending the pins of the common-mode inductor 200's inductor winding from the side of the base 100 to the bottom of the base 100, the stability of the connection between the common-mode inductor 200 and the base 100 can be improved. Furthermore, it facilitates electrical connection between the common-mode inductor 200 and other components on the side or bottom of the base 100. Additionally, the first pin 221 of the first inductor winding 220 and the third pin 231 of the second inductor winding 230 are located on the same side of the base 100, facilitating the simultaneous electrical connection of components to both pins 221 and 231 when components are placed on the side. Similarly, the second pin 222 of the first inductor winding 220 and the fourth pin 232 of the second inductor winding 230 are located on the same side of the base 100, again facilitating the simultaneous electrical connection of components to both pins 222 and 232 when components are placed on the side.

[0037] Reference Figure 1 , Figure 6 and Figure 7 As shown, in the filtering assembly provided in some embodiments of this utility model, the front side of the base 100 is provided with a first groove 110 for fixing the first pin 221 and the third pin 231, and the rear side is provided with a second groove 120 for fixing the second pin 222 and the fourth pin 232.

[0038] In this embodiment, by providing a groove on the side of the base 100, the pins of the inductor winding of the common mode inductor 200 can be better fixed, thereby improving the ease of installation and the stability of the common mode inductor 200 after installation.

[0039] In some embodiments of the filtering components provided in this utility model, refer to Figure 1 , Figure 2 and Figure 7 As shown, a first connecting piece 400 is provided between the first Y capacitor C1 and the second Y capacitor C2, and the first Y capacitor C1 and the second Y capacitor C2 are respectively welded to the first connecting piece 400. Reference Figure 1 , Figure 3 and Figure 7 As shown, a second connecting piece 500 is provided between the third Y capacitor C3 and the fourth Y capacitor C4, and the third Y capacitor C3 and the fourth Y capacitor C4 are respectively welded to the second connecting piece 500.

[0040] More specifically, the first Y capacitor C1, the second Y capacitor C2, the third Y capacitor C3, and the fourth Y capacitor C4 are surface-mount capacitors.

[0041] On the front side of the base 100, one pin of the first Y capacitor C1 is connected to the first pin 221 of the first inductor winding 220 by laser welding, and the other pin of the first Y capacitor C1 is connected to the first connecting piece 400 by laser welding; one pin of the second Y capacitor C2 is connected to the third pin 231 of the second inductor winding 230 by laser welding, and the other pin of the second Y capacitor C2 is connected to the first connecting piece 400 by laser welding.

[0042] Similarly, on the rear side of the base 100, one pin of the third Y capacitor C3 is connected to the second pin 222 of the first inductor winding 220 by laser welding, and the other pin of the third Y capacitor C3 is connected to the second connecting piece 500 by laser welding; one pin of the fourth Y capacitor C4 is connected to the fourth pin 232 of the second inductor winding 230 by laser welding, and the other pin of the fourth Y capacitor C4 is connected to the second connecting piece 500 by laser welding.

[0043] In this embodiment, the connection traces between each pin of the common-mode inductor 200 and the corresponding Y capacitors are relatively short, thereby reducing parasitic inductance and minimizing problems caused by resonance.

[0044] Reference Figure 1 , Figure 2 , Figure 3 and Figure 7As shown, in the filtering components provided in some embodiments of this utility model, both the first connecting piece 400 and the second connecting piece 500 are provided with plug-in pins 410 facing downwards towards the base 100.

[0045] In this embodiment, by providing a plug-in pin 410 in the first connecting piece 400 and the second connecting piece 500 as a ground connection pin, the connection point between the two Y capacitors can be conveniently grounded.

[0046] In some embodiments of the present invention, the first inductor winding 220 and the second inductor winding 230 are made of copper-aluminum alloy flat wire.

[0047] In this embodiment, the first inductor winding 220 and the second inductor winding 230 are made of copper-aluminum alloy flat wire, which can increase the number of turns on the magnetic core 210 and achieve the weight reduction of the common mode inductor 200.

[0048] Reference Figure 9 This utility model embodiment also provides a filtering component, including a base 100, a common-mode inductor 200, a first X capacitor C5, and a second X capacitor C6, wherein: Base 100 serves as a support; The common-mode inductor 200 includes a magnetic core 210 mounted on a base 100 and a first inductor winding 220 and a second inductor winding 230 wound on the magnetic core 210; the first inductor winding 220 includes a first pin 221 and a second pin 222, and the second inductor winding 230 includes a third pin 231 and a fourth pin 232. The first pin 221 and the third pin 231 extend from the front side of the base 100 to the bottom of the base 100, and the second pin 222 and the fourth pin 232 extend from the rear side of the base 100 to the bottom of the base 100. The first capacitor C5 is disposed on the front side of the base 100 and is soldered to the first pin 221 and the third pin 231 respectively. The second capacitor C6 is located on the rear side of the base 100 and is soldered to the second pin 222 and the fourth pin 232 respectively.

[0049] According to the filtering component provided in this embodiment of the present invention, a common-mode inductor 200, a first X capacitor C5, and a second X capacitor C6 are integrated together by setting a base 100. The base 100 fixes the magnetic core 210 of the common-mode inductor 200. The first X capacitor C5 and the second X capacitor C6 are installed on the side of the base 100 and are directly electrically connected to the pins of the first inductor winding 220 and the second inductor winding 230 wound on the magnetic core 210. This makes the electrical connection traces between the common-mode inductor 200 and the first X capacitor C5 and the second X capacitor C6 shorter, thereby reducing parasitic inductance and reducing problems caused by resonance. The filtering component has a high degree of integration and does not require setting electrical connection traces between inductors and capacitors on the circuit board, which can meet the requirements of miniaturization and lightweighting.

[0050] It is understandable that the filtering component in this embodiment is related to... Figures 1 to 8 Compared to the filter assembly shown, the only difference is that the Y capacitors disposed on the side of the base 100 are replaced with X capacitors. The function and other detailed features of the filter assembly provided in this embodiment can be found in [reference needed]. Figures 1 to 8 The filtering components shown are not described in detail here.

[0051] Reference Figure 10 This utility model embodiment also provides a filtering component, including a base 100, a common-mode inductor 200, a first X capacitor C5, a second X capacitor C6, a first Y capacitor C1, a second Y capacitor C2, a third Y capacitor C3, and a fourth Y capacitor C4, wherein: Base 100 serves as a support; The common-mode inductor 200 includes a magnetic core 210 mounted on a base 100 and a first inductor winding 220 and a second inductor winding 230 wound on the magnetic core 210; the first inductor winding 220 includes a first pin 221 and a second pin 222, and the second inductor winding 230 includes a third pin 231 and a fourth pin 232. The first pin 221 and the third pin 231 extend from the front side of the base 100 to the bottom of the base 100, and the second pin 222 and the fourth pin 232 extend from the rear side of the base 100 to the bottom of the base 100. The first capacitor C5 is disposed on the front side of the base 100 and is soldered to the first pin 221 and the third pin 231 respectively. The second X capacitor C6 is located on the rear side of the base 100 and is soldered to the second pin 222 and the fourth pin 232 respectively. The first Y capacitor C1 and the second Y capacitor C2 are disposed on the front side of the base 100, and the first pin 221, the first Y capacitor C1, the second Y capacitor C2 and the third pin 231 are sequentially soldered together. The third Y capacitor C3 and the fourth Y capacitor C4 are located on the rear side of the base 100, and the second pin 222, the third Y capacitor C3, the fourth Y capacitor C4 and the fourth pin 232 are soldered together in sequence.

[0052] According to the filtering component provided in this embodiment of the present invention, a common-mode inductor 200, a first X capacitor C5, a second X capacitor C6, a first Y capacitor C1, a second Y capacitor C2, a third Y capacitor C3, and a fourth Y capacitor C4 are integrated together by setting a base 100. The base 100 fixes the magnetic core 210 of the common-mode inductor 200. The first X capacitor C5, the second X capacitor C6, the first Y capacitor C1, the second Y capacitor C2, the third Y capacitor C3, and the fourth Y capacitor C4 are mounted on the side of the base 100 and directly... The pins of the first inductor winding 220 and the second inductor winding 230 wound on the magnetic core 210 are electrically connected, so that the electrical connection traces between the common mode inductor 200 and the first X capacitor C5, the second X capacitor C6, the first Y capacitor C1, the second Y capacitor C2, the third Y capacitor C3, and the fourth Y capacitor C4 are shorter, thereby reducing parasitic inductance and reducing problems caused by resonance; the filter component has a high degree of integration, and there is no need to set electrical connection traces between inductors and capacitors on the circuit board, which can meet the requirements of miniaturization and weight reduction.

[0053] It is understandable that the filtering component in this embodiment is related to... Figures 1 to 8 Compared to the filter assembly shown, the only difference is the addition of a first X capacitor C5 to the front side of the base 100 and a second X capacitor C6 to the rear side of the base 100. The function and other detailed features of the filter assembly provided in this embodiment can be found in [reference needed]. Figures 1 to 8 The filtering components shown are not described in detail here.

[0054] Furthermore, in this embodiment, the first X capacitor C5 is located above the first Y capacitor C1 and the second Y capacitor C2; the second X capacitor C6 is located above the third Y capacitor C3 and the fourth Y capacitor C4, thereby achieving a staggered arrangement of the X capacitors and Y capacitors.

[0055] Reference Figure 11 As shown, in the filter assembly provided in some embodiments of this utility model, the magnetic core 210 includes a circular magnetic conductive layer 211 and a paint layer 212 wrapped around the outer surface of the magnetic conductive layer 211. The magnetic conductive layer 211 is made of three layers of magnetic conductive materials stacked sequentially: a first manganese zinc ferrite layer 201, an amorphous material layer 202, and a second manganese zinc ferrite layer 203.

[0056] In this embodiment, the magnetic conductive layer 211 is made of three layers of magnetic conductive materials stacked sequentially. The first manganese zinc ferrite layer 201 and the second manganese zinc ferrite layer 203 have good high-frequency impedance characteristics, and the amorphous material layer 202 has good low-frequency impedance characteristics. With the same winding, impedance values ​​for different frequency bands can be achieved, solving the electromagnetic interference problem caused by high frequency. It also allows the common mode inductor 200 to be adjusted and designed to meet the limiting reactance requirements of electronic control products in different frequency bands, achieving optimal design. Furthermore, it helps to reduce the weight of the common mode inductor 200, further realizing the lightweighting of the common mode inductor 200.

[0057] In addition, a second aspect of the present invention provides a circuit board including the filtering component of the first aspect embodiment described above.

[0058] According to the circuit board provided in this embodiment of the present invention, the common-mode inductor 200 and the first capacitor are integrated together by setting a base 100 in the filter component. The base 100 fixes the magnetic core 210 of the common-mode inductor 200. The first capacitor is installed on the side of the base 100 and is directly electrically connected to the pins of the first inductor winding 220 and the second inductor winding 230 wound on the magnetic core 210. This makes the electrical connection trace between the common-mode inductor 200 and the first capacitor shorter, thereby reducing parasitic inductance and reducing problems caused by resonance. The filter component has a high degree of integration and does not require setting electrical connection traces between the inductor and the capacitor on the circuit board, which can meet the requirements of miniaturization and lightweighting.

[0059] It should also be noted that in the circuit board provided in this embodiment of the present invention, since the filter component integrates X capacitor and / or Y capacitor, there is no need to set X capacitor and / or Y capacitor on the circuit board, which can effectively reduce the area of ​​the circuit board and reduce the parasitic inductance caused by the traces on the circuit board, thereby reducing EMI resonance and other problems caused by parasitic inductance.

[0060] In addition, a third aspect of the present invention provides a household appliance, including the filter component of the first aspect embodiment above, or the circuit board of the second aspect embodiment above.

[0061] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A filtering component, characterized in that, include: The base serves as a support; A common-mode inductor includes a magnetic core mounted on the base and a first inductor winding and a second inductor winding wound on the magnetic core; A first capacitor is disposed on the side of the base and is electrically connected to the pins of the first inductor winding and the pins of the second inductor winding.

2. The filtering component according to claim 1, characterized in that, The first inductor winding includes a first pin and a second pin, and the second inductor winding includes a third pin and a fourth pin. The first pin and the third pin extend from the front side of the base to the bottom of the base, and the second pin and the fourth pin extend from the rear side of the base to the bottom of the base.

3. The filtering component according to claim 2, characterized in that, The front side of the base is provided with a first groove for fixing the first pin and the third pin, and the rear side is provided with a second groove for fixing the second pin and the fourth pin.

4. The filtering component according to claim 2, characterized in that, The first capacitor is an X capacitor.

5. The filtering component according to claim 4, characterized in that, There are two X capacitors, namely a first X capacitor and a second X capacitor. The first X capacitor is located on the front side of the base and is soldered to the first pin and the third pin respectively. The second X capacitor is located on the rear side of the base and is soldered to the second pin and the fourth pin respectively.

6. The filtering component according to claim 2, characterized in that, The first capacitor is a Y capacitor.

7. The filtering component according to claim 6, characterized in that, The Y capacitor is provided in four parts, namely the first Y capacitor, the second Y capacitor, the third Y capacitor and the fourth Y capacitor; The first Y capacitor and the second Y capacitor are disposed on the front side of the base, and the first pin, the first Y capacitor, the second Y capacitor and the third pin are sequentially soldered together; The third Y capacitor and the fourth Y capacitor are disposed on the rear side of the base, and the second pin, the third Y capacitor, the fourth Y capacitor and the fourth pin are sequentially soldered together.

8. The filtering component according to claim 7, characterized in that, A first connecting piece is provided between the first Y capacitor and the second Y capacitor, and the first Y capacitor and the second Y capacitor are respectively welded to the first connecting piece; a second connecting piece is provided between the third Y capacitor and the fourth Y capacitor, and the third Y capacitor and the fourth Y capacitor are respectively welded to the second connecting piece.

9. The filtering component according to claim 8, characterized in that, Both the first connecting piece and the second connecting piece are provided with plug-in pins facing downwards towards the base.

10. The filtering component according to claim 1, characterized in that, The magnetic core includes a ring-shaped magnetic conductive layer and an outer surface paint layer wrapped around the magnetic conductive layer. The magnetic conductive layer is made of three layers of magnetic conductive materials stacked sequentially: a first manganese-zinc ferrite layer, an amorphous material layer, and a second manganese-zinc ferrite layer.

11. The filtering component according to claim 1, characterized in that, The first inductor winding and the second inductor winding are made of copper-aluminum alloy flat wire.

12. A filtering component, characterized in that, include: The base serves as a support; A common-mode inductor includes a magnetic core mounted on the base and a first inductor winding and a second inductor winding wound on the magnetic core; the first inductor winding includes a first pin and a second pin, the second inductor winding includes a third pin and a fourth pin, the first pin and the third pin extend from the front side of the base to the bottom of the base, and the second pin and the fourth pin extend from the rear side of the base to the bottom of the base; The first X capacitor is disposed on the front side of the base and is soldered to the first pin and the third pin respectively; The second X capacitor is disposed on the rear side of the base and is soldered to the second pin and the fourth pin respectively; The first Y capacitor and the second Y capacitor are disposed on the front side of the base, and the first pin, the first Y capacitor, the second Y capacitor and the third pin are sequentially soldered together. The third Y capacitor and the fourth Y capacitor are disposed on the rear side of the base, and the second pin, the third Y capacitor, the fourth Y capacitor and the fourth pin are sequentially soldered together.

13. The filtering component according to claim 12, characterized in that, The first X capacitor is located above the first Y capacitor and the second Y capacitor; the second X capacitor is located above the third Y capacitor and the fourth Y capacitor.

14. A circuit board, characterized in that, Includes the filtering component as described in any one of claims 1 to 13.

15. A household appliance, characterized in that, It includes the filtering component as described in any one of claims 1 to 13, or the circuit board as described in claim 14.

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