Electromagnetic interference filter, indoor unit, outdoor unit, and air conditioner

Abstract

The utility model provides an electromagnetic interference filter, an indoor unit, an outdoor unit and an air conditioner. The electromagnetic interference filter is provided with a first end, a second end, a third end, a fourth end, a fifth end and a sixth end. Wherein the first end is arranged to be a first live wire end connected with the indoor unit electric control board and a second live wire end connected with the outdoor unit electric control board; the second end is arranged to be connected with a first zero line end of the indoor unit electric control board and a second zero line end of the outdoor unit electric control board; the third end is arranged to be connected with a first ground wire end of the indoor electronic control board and a second ground wire end of the outdoor electronic control board; the fourth end is connected with an input live wire; the fifth end is connected with an input zero line, and the sixth end is connected with an input earth line. The electromagnetic interference filter can simultaneously suppress electromagnetic interference noise generated by an indoor unit and an outdoor unit of the air conditioner, so that the production process of the air conditioner can be simplified, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present application mainly relates to the technical field of air conditioners, and in particular to an electromagnetic interference filter, an indoor unit, an outdoor unit and an air conditioner. Background Art

[0002] At present, electromagnetic interference filters are installed in air conditioners to suppress electromagnetic interference noise generated during power supply. Taking a split air conditioner as an example, a cable is used to connect the indoor unit and the outdoor unit, and electromagnetic interference filters are installed in the indoor unit and the outdoor unit to suppress the electromagnetic interference noise generated by components and cables. However, this will lead to complex processes and high manufacturing costs of air conditioners. Utility Model Content

[0003] The purpose of the present application is to provide an electromagnetic interference filter, an indoor unit, an outdoor unit and an air conditioner, which are used to solve the problem that the existing electromagnetic interference filter makes the production process of the air conditioner complicated and costly.

[0004] To achieve the above-mentioned purpose, in a first aspect, the present application provides an electromagnetic interference filter, which has a first end, a second end, a third end, a fourth end, a fifth end and a sixth end; wherein: the first end is configured to be connected to a first live wire end of an indoor electrical control board, and to be connected to a second live wire end of an outdoor electrical control board; the second end is configured to be connected to a first neutral wire end of the indoor electrical control board, and to be connected to a second neutral wire end of the outdoor electrical control board; the third end is configured to be connected to a first ground wire end of the indoor electrical control board, and to be connected to a second ground wire end of the outdoor electrical control board; the fourth end is configured to be connected to an input live wire; the fifth end is configured to be connected to an input neutral wire; and the sixth end is configured to be connected to an input earth wire.

[0005] The advantage of the present application is that power is supplied to the internal machine electronic control board and the external machine electronic control board through the same electromagnetic interference filter, and the same electromagnetic interference filter can suppress the electromagnetic interference noise generated inside the air conditioner, thereby simplifying the production process of the air conditioner and reducing manufacturing costs.

[0006] In some embodiments, the electromagnetic interference filter further includes a fuse, and the fuse is configured to be connected between the input live wire and the fourth end.

[0007] In some embodiments, the electromagnetic interference filter includes at least one primary filter and / or at least one secondary filter.

[0008] In some embodiments, the first-stage filter includes a filter inductor and at least one filter capacitor; wherein the upper end of the filter inductor is connected between the first end and the fourth end, and the lower end of the filter inductor is connected between the second end and the fifth end.

[0009] In some embodiments, the secondary filter includes two filter inductors and at least one filter capacitor; the two filter inductors are arranged in series; the upper end of one of the two filter inductors is connected between the first end and the upper end of the other filter inductor, and the lower end of one of the filter inductors is connected between the second end and the lower end of the other filter inductor; the upper end of the other filter inductor is connected between the fourth end and the upper end of one of the filter inductors, and the lower end of the other filter inductor is connected between the fifth end and the lower end of one of the filter inductors.

[0010] In some embodiments, the at least one filter capacitor includes any one or a combination of the following: a filter capacitor arranged between the first end and the second end, a filter capacitor arranged between the first end and the third end, a filter capacitor arranged between the second end and the third end, a filter capacitor arranged between the fourth end and the fifth end, a filter capacitor arranged between the fourth end and the sixth end, and a filter capacitor arranged between the fifth end and the sixth end.

[0011] In some embodiments, the filter inductor is any one of a common mode inductor, a differential mode inductor, and a common mode inductor that integrates differential and common modes.

[0012] In some embodiments, the filter capacitor is an independent capacitor; or, the filter capacitor is a capacitor composed of a plurality of sub-capacitors with different capacitances connected in parallel.

[0013] In a second aspect, the present application provides an indoor unit, comprising an indoor unit electronic control board and an electromagnetic interference filter as described in any one of the first aspects above.

[0014] In a third aspect, the present application provides an external unit, comprising an external unit electronic control board and an electromagnetic interference filter as described in any one of the first aspects above.

[0015] In a fourth aspect, the present application provides an air conditioner, comprising the indoor unit as described in the second aspect, or the outdoor unit as described in the third aspect.

[0016] The beneficial effects of the indoor unit, outdoor unit and air conditioner provided in the present application are the same as the beneficial effects of the above-mentioned electromagnetic interference filter, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the present application. They are included and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and together with the present specification serve to explain the principles of the present application. In the accompanying drawings:

[0018] Figure 1 is a schematic diagram of an air conditioner provided by an exemplary embodiment of the present application;

[0019] Figure 2 Is a schematic diagram of an electromagnetic interference filter provided by a first exemplary embodiment of the present application;

[0020] Figure 3 Is a schematic diagram of an electromagnetic interference filter provided by a second exemplary embodiment of the present application;

[0021] Figure 4 Is a schematic diagram of an electromagnetic interference filter provided by a third exemplary embodiment of the present application;

[0022] Figure 5 Is a schematic diagram of an electromagnetic interference filter provided by a fourth exemplary embodiment of the present application;

[0023] Figure 6 Is a schematic diagram of an electromagnetic interference filter provided by a fifth exemplary embodiment of the present application;

[0024] Figure 7 is a schematic diagram of an electromagnetic interference filter provided by a sixth exemplary embodiment of the present application.

[0025] Reference numerals:

[0026] Air conditioner – 1,000;

[0027] Indoor unit – 100, outdoor unit – 200, electromagnetic interference filter – 300;

[0028] External machine electric control panel - 20, internal machine electric control panel - 10;

[0029] The first live wire terminal - L01, the first neutral wire terminal - N01, the first ground wire terminal - PE01;

[0030] The second live wire terminal - L02, the second neutral wire terminal - N02, the second ground wire terminal - PE02;

[0031] First end – 1, second end – 2, third end – 3;

[0032] The fourth end – 4, the fifth end – 5, the sixth end – 6;

[0033] Input live wire - L, input neutral wire - N, input earth wire - PE;

[0034] Internal unit heat exchanger - 11, fan motor drive - 12, electric motor - 13;

[0035] Outdoor unit heat exchanger - 21, outdoor unit fan - 22, compressor - 23;

[0036] Cooling liquid grounding copper pipe——24, communication cable——25. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0038] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0039] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0040] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0041] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0042] It should be understood that when a component is referred to as being "on another component," "connected to another component," "coupled to another component," or "contacting another component," it may be directly on, connected to, coupled to, or contacting the other component, or there may be intervening components. In contrast, when a component is referred to as being "directly on another component," "directly connected to," "directly coupled to," or "directly contacting" another component, there are no intervening components. Similarly, when a first component is referred to as being "electrically in contact with" or "electrically coupled to" a second component, there is an electrical path between the first component and the second component that allows current to flow. The electrical path may include capacitors, coupled inductors, and / or other components that allow current to flow, even without direct contact between conductive components.

[0043] The electromagnetic interference filter provided in the present application can be applied to an air conditioner. Taking a split air conditioner as an example, Figure 1 is a schematic diagram of an exemplary split air conditioner 1000, such as Figure 1As shown, the air conditioner 1000 includes an indoor unit 100, an outdoor unit 200 and an electromagnetic interference filter 300. The indoor unit 100 may include an indoor unit electrical control board 10 and a number of indoor unit components, such as: an indoor unit heat exchanger 11, a fan motor drive 12, an electric motor 13, etc., and the present application does not limit the specific composition of the indoor unit components. The outdoor unit 200 may include an outdoor unit electrical control board 20 and a number of outdoor unit components, such as an outdoor unit heat exchanger 21, an outdoor unit fan 22, a compressor 23, etc., and the present application does not limit the specific composition of the outdoor unit components. Among them, a refrigerant grounding copper tube 24 can usually be connected between the indoor unit 100 and the outdoor unit 200 to evacuate heat. In addition, a communication cable 25 can be set between the indoor unit electrical control board 10 and the outdoor unit electrical control board 20 for transmitting data.

[0044] In this embodiment, the electromagnetic interference filter 300 plays a role in suppressing electromagnetic interference noise in the split air conditioner 1000. It should be understood that Figure 1 It is a schematic diagram showing that the electromagnetic interference filter 300 is disposed inside the indoor unit 100 , and the electromagnetic interference filter 300 can actually also be disposed inside the outdoor unit 200 , and the present application does not impose any limitation on this.

[0045] Continue to refer Figure 1 The indoor unit electric control board 10 has a first live wire terminal L01, a first neutral wire terminal N01 and a first ground wire terminal PE01. The first live wire terminal L01 is used as a port for live wire power supply of the indoor unit 100; the first neutral wire terminal N01 is used as a port for neutral wire power supply of the indoor unit 100; and the first ground wire terminal PE01 is used as a port for grounding of the indoor unit 100.

[0046] The external machine electric control board 20 has a second live wire terminal L02, a second neutral wire terminal N02 and a second ground wire terminal PE02. The second live wire terminal L02 is used as a port for live wire power supply of the external machine 200; the second neutral wire terminal N02 is used as a port for neutral wire power supply of the external machine 200; and the second ground wire terminal PE02 is used as a port for grounding of the external machine 200.

[0047] The electromagnetic interference filter 300 has a first end 1, a second end 2 and a third end 3. Among them: the first end 1 is set to connect the first live wire end L01 of the indoor electric control board 10, and the second live wire end L01 of the outdoor electric control board 20; the second end 2 is set to connect the first zero line end N01 of the indoor electric control board 10, and the second zero line end N02 of the outdoor electric control board 20; the third end 3 is set to connect the first ground line end PE01 of the indoor electric control board 10, and the second ground line end PE02 of the outdoor electric control board 20. In this way, since the power supply circuits of the indoor electric control board 10 and the outdoor electric control board 20 will pass through the electromagnetic interference filter 300, all electromagnetic interference generated inside the air conditioner 1000 can be filtered and suppressed, which can meet the limit requirements of the conducted noise in the national standard GB4343.1 of the mandatory electromagnetic compatibility regulations for household appliances.

[0048] Furthermore, the same electromagnetic interference filter 300 is used to supply power to the indoor electric control board 10 and the outdoor electric control board 20, and the same electromagnetic interference filter can suppress the electromagnetic interference noise generated by the air conditioner 1000, thereby simplifying the production process of the air conditioner 1000 and reducing the manufacturing cost.

[0049] Continue to refer Figure 1 The electromagnetic interference filter 300 also has a fourth terminal 4, a fifth terminal 5 and a sixth terminal 6; the fourth terminal 4 is configured to connect to the input live wire L; the fifth terminal 5 is configured to connect to the input neutral wire N; and the sixth terminal 6 is configured to connect to the input earth wire PE.

[0050] It should be understood that, in the present application, the electromagnetic interference filter 300 may refer to any EMI (electromagnetic interference) filter having a live line, a neutral line, and a ground line input and output.

[0051] In some embodiments, the electromagnetic interference filter 300 further includes a fuse ( Figure 1 (not shown in the figure), the fuse can be configured to be connected between the input live wire L and the fourth end 4 to provide fault protection for the air conditioner 1000.

[0052] It will be understood that, in the case of providing fault protection for the air conditioner 1000, there may be multiple fuses, which may be respectively connected to multiple different ports of the electromagnetic interference filter 300. For example, a corresponding fuse may also be connected between the input neutral line N and the fifth terminal 5 of the electromagnetic interference filter 300. Those skilled in the art may adjust the number and connection method of the fuses according to actual conditions, which will not be described in detail here.

[0053] In some embodiments, the electromagnetic interference filter 300 includes at least one primary filter and / or at least one secondary filter.

[0054] The primary filter includes a filter inductor and at least one filter capacitor; the upper end of one filter inductor is connected between the first end 1 and the fourth end 4, and the lower end of one filter inductor is connected between the second end 2 and the fifth end 5.

[0055] The secondary filter comprises two filter inductors and at least one filter capacitor; the two filter inductors are arranged in series; the upper end of one of the two filter inductors is connected between the first end 1 and the upper end of the other filter inductor, and the lower end of one of the filter inductors is connected between the second end 2 and the lower end of the other filter inductor; the upper end of the other filter inductor is connected between the fourth end 4 and the upper end of one of the filter inductors, and the lower end of the other filter inductor is connected between the fifth end 5 and the lower end of one of the filter inductors.

[0056] The at least one filter capacitor includes any one or a combination of the following: a filter capacitor arranged between the first end 1 and the second end 2, a filter capacitor arranged between the first end 1 and the third end 3, a filter capacitor arranged between the second end 2 and the third end 3, a filter capacitor arranged between the fourth end 4 and the fifth end 5, a filter capacitor arranged between the fourth end 4 and the sixth end 6, and a filter capacitor arranged between the fifth end 5 and the sixth end 6.

[0057] In some embodiments, the filter inductor is any one of a common mode inductor, a differential mode inductor, and a common mode inductor that integrates differential mode and common mode.

[0058] In some embodiments, the filter capacitor is an independent capacitor; or, the filter capacitor is a capacitor composed of a plurality of sub-capacitors with different capacitances connected in parallel to achieve a noise suppression effect in a wider frequency range.

[0059] The implementation of the electromagnetic interference filter 300 will be described in detail below in combination with Embodiments 1 to 6. Example 1

[0060] Figure 2 is a schematic diagram of an electromagnetic interference filter 300 of the first exemplary embodiment provided by the present application. Figure 2 The electromagnetic interference filter 300 includes a first-stage filter, which includes: a filter inductor (L1) and four filter capacitors (CX1, CX2, CY1 and CY2). Figure 2As shown, the upper right end of the filter inductor L1 is connected to the upper end of the filter capacitor CX1 and the fourth end 4, wherein the fourth end 4 is connected to the input live wire L; the lower right end of the filter inductor L1 is connected to the lower end of the filter capacitor CX1 and the fifth end 5, wherein the fifth end 5 is connected to the input neutral line N; the upper left end of the filter inductor L1 is connected to the upper end of the filter capacitor CX2 and the upper end of the filter capacitor CY2, and then connected to the first end 1; the lower left end of the filter inductor L1 is connected to the lower end of the filter capacitor CX2 and the upper end of the filter capacitor CY1, and then connected to the second end 2; the lower end of the filter capacitor CY2 is connected to the lower end of CY1, and then connected to the earth PE; the lower ends of the filter capacitors CY1 and CY2 are connected, and then connected to the third end 3 and the sixth end 6, wherein the sixth end 6 is connected to the input earth line PE.

[0061] It should be understood that the filter inductor L1 can be a common mode inductor or a differential mode inductor, or a common mode inductor that integrates differential and common mode; the specific inductance can be adjusted according to the difference between the actual noise amplitude and the conducted noise limit in the national standard GB4343.1. The filter capacitors CX1, CX2, CY1 and CY2 can be separate filter capacitors, or they can be capacitors composed of multiple sub-capacitors with different capacitances connected in parallel to achieve a wider frequency range of noise suppression effects.

[0062] In this way, the first end 1 of the electromagnetic interference filter 300 of the first exemplary embodiment is connected to the Figure 1 The first live wire terminal L01 and the second live wire terminal L02 are connected to the second terminal 2 as shown. Figure 1 The first zero line terminal N01, the second zero line terminal N02 and the third terminal 3 are respectively connected to Figure 1 The first ground terminal PE01 and the second ground terminal PE02 are shown; after testing, it was found that the electromagnetic interference noise generated in the air conditioner 1000 can meet the limit requirements of the conducted noise in the national standard GB4343.1 of the mandatory electromagnetic compatibility regulations, which greatly simplifies the production process of the air conditioner 1000 and reduces the manufacturing cost. Example 2

[0063] Figure 3 is a schematic diagram of an electromagnetic interference filter 300 according to a second exemplary embodiment of the present application. Figure 3 The electromagnetic interference filter 300 includes a first-stage filter, which includes: a filter inductor (L1) and six filter capacitors (CX1, CX2, CY1, CY2, CY3, CY4). Figure 3As shown, the upper right end of the filter inductor L1 and the upper end of the filter capacitor CX1 are connected to the upper end of the filter capacitor CY1 and the fourth end 4, wherein the fourth end 4 is connected to the input live wire L; the lower right end of the filter inductor L1 is connected to the lower end of the filter capacitor CX1, the upper end of the filter capacitor CY2 and the fifth end 5, wherein the fifth end 5 is connected to the input neutral line N; the upper left end of the filter inductor L1 is connected to the upper end of the filter capacitor CX2 and the upper end of the filter capacitor CY4 and then connected to the first end 1; the lower left end of the filter inductor L1 is connected to the lower end of the filter capacitor CX2 and the upper end of the filter capacitor CY3 and then connected to the second end 2; the lower end of the filter capacitor CY4 is connected to the lower end of CY3 and then connected to the earth PE; the lower ends of the filter capacitors CY1, CY2, CY3 and CY4 are connected and then connected to the third end 3 and the sixth end 6, wherein the sixth end 6 is connected to the input earth line PE.

[0064] It should be understood that the filter inductor L1 can be a common mode inductor or a differential mode inductor, or a common mode inductor that integrates differential and common modes; the specific inductance can be adjusted according to the difference between the actual noise amplitude and the conducted noise limit in the national standard GB4343.1. The filter capacitors CX1, CX2, CY1, CY2, CY3 and CY4 can be separate filter capacitors, or capacitors composed of multiple sub-capacitors with different capacitances connected in parallel to achieve a wider frequency range of noise suppression effects.

[0065] In this way, the first end 1 of the electromagnetic interference filter 300 of the second exemplary embodiment is connected to the Figure 1 The first live wire terminal L01 and the second live wire terminal L02 are connected to the second terminal 2 as shown. Figure 1 The first zero line terminal N01, the second zero line terminal N02 and the third terminal 3 are respectively connected to Figure 1 The first ground terminal PE01 and the second ground terminal PE02 are shown; after testing, it was found that the electromagnetic interference noise generated in the air conditioner 1000 can meet the limit requirements of the conducted noise in the national standard GB4343.1 of the mandatory electromagnetic compatibility regulations, which greatly simplifies the production process of the air conditioner 1000 and reduces the manufacturing cost. Example 3

[0066] Figure 4 is a schematic diagram of an electromagnetic interference filter 300 according to a third exemplary embodiment of the present application. Figure 4 The electromagnetic interference filter 300 includes a first-stage filter, which includes: a filter inductor (L1) and four filter capacitors (CX1, CX2, CY1, CY2). Figure 4As shown, the upper right end of the filter inductor L1 and the upper end of the filter capacitor CX1 are connected to the upper end of the filter capacitor CY1 and the fourth end 4, wherein the fourth end 4 is connected to the input live wire L; the lower right end of the filter inductor L1 is connected to the lower end of the filter capacitor CX1, the upper end of the filter capacitor CY2 and the fifth end 5, wherein the fifth end 5 is connected to the input neutral line N; the lower end of the filter capacitor CY2 is connected to the lower end of CY1 and then connected to the earth PE; the upper left end of the filter inductor L1 is connected to the upper end of the filter capacitor CX2 and then connected to the first end 1; the lower left end of the filter inductor L1 is connected to the lower end of the filter capacitor CX2 and then connected to the second end 2; the lower ends of the filter capacitors CY1 and CY2 are connected and then connected to the third end 3 and the sixth end 6, wherein the sixth end 6 is connected to the input earth line PE.

[0067] It should be understood that the filter inductor L1 can be a common mode inductor or a differential mode inductor, or a common mode inductor that integrates differential and common modes; the specific inductance can be adjusted according to the difference between the actual noise amplitude and the conducted noise limit in the national standard GB4343.1. The filter capacitors CX1, CX2, CY1, and CY2 can be separate filter capacitors, or they can be capacitors composed of multiple sub-capacitors of different capacitances connected in parallel to achieve a wider frequency range of noise suppression effects.

[0068] In this way, the first end 1 of the electromagnetic interference filter 300 of the third exemplary embodiment is connected to the Figure 1 The first live wire terminal L01 and the second live wire terminal L02 are connected to the second terminal 2 as shown. Figure 1 The first zero line terminal N01, the second zero line terminal N02 and the third terminal 3 are respectively connected to Figure 1 The first ground terminal PE01 and the second ground terminal PE02 are shown; after testing, it was found that the electromagnetic interference noise generated in the air conditioner 1000 can meet the limit requirements of the conducted noise in the national standard GB4343.1 of the mandatory electromagnetic compatibility regulations, which greatly simplifies the production process of the air conditioner 1000 and reduces the manufacturing cost. Example 4

[0069] Figure 5 is a schematic diagram of an electromagnetic interference filter 300 according to a fourth exemplary embodiment of the present application. Figure 5 The electromagnetic interference filter 300 includes a two-stage filter, which includes: two filter inductors (L1, L2) and seven filter capacitors (CX1, CX2, CX4, CY1, CY2, CY3, CY4). Figure 5As shown, the upper right end of the filter inductor L1 is connected to the upper end of the filter capacitor CX1 and the fourth end 4, wherein the fourth end 4 is connected to the input live wire L; the lower right end of the filter inductor L1 is connected to the lower end of the filter capacitor CX1 and the fifth end 5, wherein the fifth end 5 is connected to the input neutral line N; the upper left end of the filter inductor L1 is connected to the upper ends of the filter capacitors CX2 and CY2 and the upper right end of the filter inductor L2; the lower left end of the filter inductor L1 is connected to the lower end of the filter capacitor CX2, the upper end of the filter capacitor CY1 and the lower right end of the filter inductor L2; the upper left end of the filter inductor L2 is connected to the upper end of the filter capacitor CX4 and the upper end of the filter capacitor CY4 and then connected to the first end 1; the lower end of the filter inductor L2 is connected to the filter capacitor CX4 and the filter capacitor CY3 After being connected, it is connected to the second end 2; the lower end of the filter capacitor CY2 is connected to the ground PE; the lower ends of the filter capacitors CY1, CY2, CY3 and CY4 are connected to the third end 3 and the sixth end 6, wherein the sixth end 6 is connected to the input ground line PE.

[0070] It should be understood that the filter inductors L1 and L2 can be common-mode inductors or differential-mode inductors, or common-mode inductors that integrate differential and common modes; the specific inductance can be adjusted according to the difference between the actual noise amplitude and the conducted noise limit in the national standard GB4343.1. The specific inductance of the filter inductors L1 and L2 can be consistent or inconsistent. The filter capacitors CX1, CX2, CX4, CY1, CY2, CY3 and CY4 can be separate filter capacitors, or they can be capacitors composed of multiple sub-capacitors with different capacitances connected in parallel to achieve the noise suppression effect in a wider frequency range.

[0071] In this way, the first end 1 of the electromagnetic interference filter 300 of the fourth exemplary embodiment is connected to the Figure 1 The first live wire terminal L01 and the second live wire terminal L02 are connected to the second terminal 2 as shown. Figure 1 The first zero line terminal N01, the second zero line terminal N02 and the third terminal 3 are respectively connected to Figure 1 The first ground terminal PE01 and the second ground terminal PE02 are shown; after testing, it was found that the electromagnetic interference noise generated in the air conditioner 1000 can meet the limit requirements of the conducted noise in the national standard GB4343.1 of the mandatory electromagnetic compatibility regulations, which greatly simplifies the production process of the air conditioner 1000 and reduces the manufacturing cost. Example 5

[0072] Figure 6 is a schematic diagram of an electromagnetic interference filter 300 according to a fifth exemplary embodiment of the present application. Figure 6The electromagnetic interference filter 300 includes a two-stage filter, which includes: two filter inductors (L1, L2) and nine filter capacitors (CX1, CX2, CX4, CY1, CY2, CY3, CY4, CY5, CY6). Figure 6 As shown, the upper right end of the filter inductor L1 is connected to the upper end of the filter capacitor CX1, the upper end of the filter capacitor CY5 and the fourth end 4, wherein the fourth end 4 is connected to the input live wire L; the lower right end of the filter inductor L1 is connected to the lower end of the filter capacitor CX1, the upper end of the filter capacitor CY6 and the fifth end 5, wherein the fifth end 5 is connected to the input neutral line N; the upper left end of the filter inductor L1 is connected to the upper end of the filter capacitor CX2, the upper end of the filter capacitor CY2 and the upper right end of the filter inductor L2; the lower left end of the filter inductor L1 is connected to the lower end of the filter capacitor CX2, the upper end of the filter capacitor CY1 and the lower right end of the filter inductor L2; the upper left end of the filter inductor L2 is connected to the upper end of the filter capacitor CX4 and the upper end of the filter capacitor CY4 and then connected to the first end 1; the lower end of the filter capacitor CY1 is connected to the earth PE; the lower end of the filter inductor L2 is connected to the upper ends of the filter capacitor CX4 and the filter capacitor CY3 and then connected to the second end 2. The lower ends of the filter capacitors CY1, CY2, CY3, CY4, CY5 and CY6 are connected to the third end 3 and the sixth end 6, wherein the sixth end 6 is connected to the input ground line PE.

[0073] It should be understood that the filter inductors L1 and L2 can be common-mode inductors or differential-mode inductors, or common-mode inductors that integrate differential and common modes; the specific inductance can be adjusted according to the difference between the actual noise amplitude and the conducted noise limit in the national standard GB4343.1. The specific inductance of the filter inductors L1 and L2 can be consistent or inconsistent. The filter capacitors CX1, CX2, CX4, CY1, CY2, CY3, CY4, CY5 and CY6 can be separate filter capacitors, or they can be capacitors composed of multiple sub-capacitors with different capacitances connected in parallel to achieve the noise suppression effect in a wider frequency range.

[0074] In this way, the first end 1 of the electromagnetic interference filter 300 of the fifth exemplary embodiment is connected to the Figure 1 The first live wire terminal L01 and the second live wire terminal L02 are connected to the second terminal 2 as shown. Figure 1 The first zero line terminal N01, the second zero line terminal N02 and the third terminal 3 are respectively connected to Figure 1The first ground terminal PE01 and the second ground terminal PE02 are shown; after testing, it was found that the electromagnetic interference noise generated in the air conditioner 1000 can meet the limit requirements of the conducted noise in the national standard GB4343.1 of the mandatory electromagnetic compatibility regulations, which greatly simplifies the production process of the air conditioner 1000 and reduces the manufacturing cost. Example 6

[0075] Figure 7 is a schematic diagram of an electromagnetic interference filter 300 according to a sixth exemplary embodiment of the present application. Figure 7 The electromagnetic interference filter 300 includes a two-stage filter, which includes: two filter inductors (L1, L2) and seven filter capacitors (CX1, CX2, CX4, CY1, CY2, CY5, CY6). Figure 7 As shown, the upper right end of the filter inductor L1 is connected to the upper end of the filter capacitor CX1, the upper end of the filter capacitor CY5 and the fourth end 4, wherein the fourth end 4 is connected to the input live wire L; the lower right end of the filter inductor L1 is connected to the lower end of the filter capacitor CX1, the upper end of the filter capacitor CY6 and the fifth end 5, wherein the fifth end 5 is connected to the input neutral line N; the upper left end of the filter inductor L1 is connected to the upper end of the filter capacitor CX2, the upper end of the filter capacitor CY2 and the upper right end of the filter inductor L2; the lower left end of the filter inductor L1 is connected to the lower end of the filter capacitor CX2, the upper end of the filter capacitor CY1 and the lower right end of the filter inductor L2; the upper left end of the filter inductor L2 is connected to the upper end of the filter capacitor CX4 and then connected to the first end 1; the lower left end of the filter inductor L2 is connected to the lower end of the filter capacitor CX4 and then connected to the second end 2. The lower ends of the filter capacitors CY1 , CY2 , CY5 and CY6 are connected to the third end 3 and the sixth end 6 , wherein the sixth end 6 is connected to the input ground line PE.

[0076] It should be understood that the filter inductors L1 and L2 can be common-mode inductors or differential-mode inductors, or common-mode inductors that integrate differential and common modes; the specific inductance can be adjusted according to the difference between the actual noise amplitude and the conducted noise limit in the national standard GB4343.1. The specific inductance of the filter inductors L1 and L2 can be consistent or inconsistent. The filter capacitors CX1, CX2, CX4, CY1, CY2, CY5 and CY6 can be separate filter capacitors, or they can be capacitors composed of multiple sub-capacitors with different capacitances connected in parallel to achieve the noise suppression effect in a wider frequency range.

[0077] In this way, the first end 1 of the electromagnetic interference filter 300 of the sixth exemplary embodiment is connected to the following Figure 1 The first live wire terminal L01 and the second live wire terminal L02 are connected to the second terminal 2 as shown. Figure 1 The first zero line terminal N01, the second zero line terminal N02 and the third terminal 3 are respectively connected to Figure 1 The first ground terminal PE01 and the second ground terminal PE02 are shown; after testing, it was found that the electromagnetic interference noise generated in the air conditioner 1000 can meet the limit requirements of the conducted noise in the national standard GB4343.1 of the mandatory electromagnetic compatibility regulations, which greatly simplifies the production process of the air conditioner 1000 and reduces the manufacturing cost.

[0078] Furthermore, the present application also provides an indoor unit, including an indoor unit electronic control board and any of the above-mentioned electromagnetic interference filters 300, the specific structure of which can be referred to Figure 1 The indoor unit 100 shown is not described in detail here.

[0079] Furthermore, the present application also provides an external unit, including an external unit electric control board and any of the above-mentioned electromagnetic interference filters 300, the specific structure of which can be referred to Figure 1 The external unit 200 shown is not described in detail here.

[0080] Furthermore, the present application also provides an air conditioner, including the above-mentioned indoor unit or outdoor unit, and the specific structure can be referred to Figure 1 The air conditioner 1000 shown is not described in detail here.

[0081] To sum up, the advantage of the present application is that the internal machine electronic control board and the external machine electronic control board are powered by the same electromagnetic interference filter, and the same electromagnetic interference filter can suppress the electromagnetic interference noise generated inside the air conditioner, thereby simplifying the production process of the air conditioner and reducing manufacturing costs.

[0082] The basic concepts have been described above. Obviously, for those skilled in the art, the above application disclosure is only an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0083] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0084] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more application embodiments, in the above description of the embodiments of this application, multiple features are sometimes merged into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0085] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used for the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which can be changed according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the method of general digit retention. Although the numerical domains and parameters used to confirm the breadth of the range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

Claims

1. An electromagnetic interference filter, characterized in that: The electromagnetic interference filter has a first end, a second end, a third end, a fourth end, a fifth end and a sixth end; wherein: The first end is configured to be a first live wire end connected to the indoor motor electrical control board, and a second live wire end connected to the outdoor motor electrical control board; The second end is configured to be connected to a first neutral line terminal of the indoor electric control board and a second neutral line terminal of the outdoor electric control board; The third end is configured to be connected to a first ground terminal of the inner machine electric control board and a second ground terminal of the outer machine electric control board; The fourth end is configured to be connected to an input live wire; The fifth end is configured to be connected to an input neutral line; The sixth end is configured to be connected to an input ground line.

2. The electromagnetic interference filter according to claim 1, characterized in that The electromagnetic interference filter further includes a fuse, which is configured to be connected between the input live wire and the fourth end.

3. The electromagnetic interference filter according to claim 2, characterized in that The electromagnetic interference filter includes at least one primary filter or at least one secondary filter.

4. The electromagnetic interference filter according to claim 3, characterized in that The primary filter includes a filter inductor and at least one filter capacitor; wherein the upper end of the filter inductor is connected between the first end and the fourth end, and the lower end of the filter inductor is connected between the second end and the fifth end.

5. The electromagnetic interference filter according to claim 4, characterized in that The secondary filter comprises two filter inductors and at least one filter capacitor; the two filter inductors are arranged in series; The upper end of one of the two filter inductors is connected between the first end and the upper end of the other filter inductor, and the lower end of one of the filter inductors is connected between the second end and the lower end of the other filter inductor; the upper end of the other filter inductor is connected between the fourth end and the upper end of one of the filter inductors, and the lower end of the other filter inductor is connected between the fifth end and the lower end of one of the filter inductors.

6. The electromagnetic interference filter according to claim 4 or 5, characterized in that: The at least one filter capacitor includes any one or a combination of the following: A filter capacitor arranged between the first end and the second end, a filter capacitor arranged between the first end and the third end, a filter capacitor arranged between the second end and the third end, a filter capacitor arranged between the fourth end and the fifth end, a filter capacitor arranged between the fourth end and the sixth end, and a filter capacitor arranged between the fifth end and the sixth end.

7. The electromagnetic interference filter according to claim 4 or 5, characterized in that: The filter inductor is any one of a common mode inductor, a differential mode inductor, and a common mode inductor integrating differential mode and common mode.

8. The electromagnetic interference filter according to claim 6, characterized in that The filter capacitor is an independent capacitor; or, The filter capacitor is a capacitor composed of a plurality of sub-capacitors with different capacitance values ​​connected in parallel.

9. An indoor unit, characterized in that: It comprises an internal machine electronic control board and an electromagnetic interference filter as claimed in any one of claims 1 to 8.

10. An external unit, characterized in that: It comprises an external machine electric control board and an electromagnetic interference filter as claimed in any one of claims 1 to 8.

11. An air conditioner, characterized in that: It includes the internal unit as claimed in claim 9, or the external unit as claimed in claim 10.

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