WO2019056812A1 - 断路器及其电流互感器、以及包含该断路器的家用电器 - Google Patents

断路器及其电流互感器、以及包含该断路器的家用电器 Download PDF

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Publication number
WO2019056812A1
WO2019056812A1 PCT/CN2018/091029 CN2018091029W WO2019056812A1 WO 2019056812 A1 WO2019056812 A1 WO 2019056812A1 CN 2018091029 W CN2018091029 W CN 2018091029W WO 2019056812 A1 WO2019056812 A1 WO 2019056812A1
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WO
WIPO (PCT)
Prior art keywords
current transformer
mutual inductance
inductance coil
conductor
current
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Application number
PCT/CN2018/091029
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English (en)
French (fr)
Inventor
林世锋
林晖
Original Assignee
格力电器（武汉）有限公司
珠海格力电器股份有限公司
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Application filed by 格力电器（武汉）有限公司, 珠海格力电器股份有限公司 filed Critical 格力电器（武汉）有限公司
Publication of WO2019056812A1 publication Critical patent/WO2019056812A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/04—Means for indicating condition of the switching device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/08—Terminals; Connections

Definitions

  • the present application relates to the field of circuit protection technologies, and in particular, to a circuit breaker and a current transformer thereof, and a household appliance including the same.
  • Arc faults are mainly caused by insulation damage aging or loose joints in electrical equipment and equipment connected to them, which is a common safety hazard in electrical circuits.
  • the Arc Fault Circuit Interrupters (AFCI) compares the arcing current with the fire hazard action value by detecting the arcing current in the electric device. When the motor is over, the power is cut off. Sensors that detect changes in current are a very important component.
  • the AFCI sensor is a current transformer that senses the change of current in the live line of the electrical device. It is essentially a transformer. The primary is the phase line, passing through the center of the magnetic ring. The secondary winding is a certain number of turns of the enameled wire around the magnetic ring. Both ends of the output access control board.
  • the residual current operated protective device is a protective measure against personal electric shock, electrical fire and electrical equipment damage. It effectively reduces the risk of fire by detecting leakage currents in electrical devices and grounding arc currents caused by electrical tracking currents.
  • the RCD sensor is a zero-sequence current transformer that senses the current difference between the phase and neutral lines.
  • the zero-sequence mutual current sensor is also a transformer; its primary is the phase line and the neutral line, passing through the center of the magnetic ring, the secondary winding is a certain number of turns of the enameled wire around the magnetic ring, and the output ends of the enameled wire are connected to the control board.
  • AFCI In addition to fault arc protection, AFCI also integrates other safety protection functions such as integrated leakage protection. Therefore, the device requires at least 2 sensors: a zero sequence current transformer and a current transformer.
  • the two independent units are each soldered to the control panel; as of August 17, 2016, the application number is CN105869962A "Leakage Protector Structure for Automated Assembly", using two transformer housings.
  • the test board (30001.8000021MX) used in the Gree washing machine also uses two transformers. Each transformer is made into a unit, each unit comprising a power input and output interface of the primary winding, a magnetic ring and two interfaces of the secondary winding output and a housing thereof.
  • the corresponding transformer mounting position and the above interface pads are set on the control panel.
  • the flexible loop is passed through the magnetic ring.
  • This production efficiency is low and the consistency is poor.
  • it is not used in products with large production capacity. Therefore, most of the current bare wire is fixed on the transformer housing and soldered to the PCB.
  • the primary winding requires a total of two phase lines and one center line.
  • a total of six power lines are input to the PCB interface, and two transformer housing mounting positions are required, as well as four output interfaces of the secondary winding.
  • a certain safety distance is required between the casing and the casing, between the phase line and the phase line. Not only does it take up a large PCB footprint, but the overall protection device is increased in volume and production efficiency is also low. Therefore, it is necessary to provide a structure in which two types of transformers can be integrated to overcome any of the above drawbacks.
  • the present application provides a circuit breaker and a current transformer thereof, and a household appliance including the same, which integrates the phase lines of the two current transformers and the mounting housing to enable structural changes of the structural components. Take on the function of multi-purpose.
  • a current transformer for a circuit breaker comprising: a housing, a zero-sequence mutual inductance coil, a current mutual inductance coil, a phase conductor, and a neutral conductor;
  • the zero sequence mutual inductance coil and the current mutual inductance coil are mutually stacked in the housing;
  • the sensing portion of the phase conductor simultaneously passes through the zero sequence mutual inductance coil and the current mutual inductance coil such that the zero sequence mutual inductance coil and the current mutual inductance coil share the phase line conductor;
  • the sensing portion of the neutral conductor passes through the zero sequence mutual inductance coil.
  • the current transformer further comprises:
  • the current transformer further comprises:
  • first pair of pins and the second pair of pins are disposed on the housing;
  • a secondary winding of the current mutual inductance coil is coupled to the first pair of pins as an inductive signal output of the current transformer
  • a secondary winding of the zero sequence mutual inductance coil is coupled to the second pair of pins as an inductive signal output of the zero sequence transformer.
  • the housing includes a cylindrical outer peripheral wall portion and an inner peripheral wall portion formed in the overlapping direction formed in the outer peripheral wall portion; the current mutual inductance coil and the zero-order mutual inductance coil are placed between the outer peripheral wall portion and the inner peripheral wall portion, Further, the sensing portion of the phase conductor and the sensing portion of the neutral conductor are located in the inner peripheral wall portion.
  • a spacer member is provided between the sensing portion of the phase conductor and the sensing portion of the neutral conductor.
  • the spacing member is a vertical partition extending in the stacking direction.
  • a horizontal spacing member is disposed inside the outer peripheral wall portion of the housing along a direction perpendicular to the stacking to form upper and lower chambers in the outer peripheral wall portion of the housing
  • One of the upper and lower cavities is for accommodating a current transformer, and the other of the upper and lower cavities is for accommodating a zero-sequence transformer.
  • the vertical partition extending in the overlapping direction is disposed on the inner side of the inner peripheral wall portion, and the vertical partition and the inner peripheral wall are semicircularly formed to pass through the zero-sequence transformer mounting cavity and current mutual inductance a cavity of the mounting cavity, the cavity being a sensing portion for accommodating the phase conductor; the other semicircular of the vertical partition and the inner peripheral wall enclosing a cavity extending through the zero-sequence transformer mounting cavity, the cavity being accommodated The sensing portion of the linear conductor.
  • the outer peripheral wall portion is further formed with a first fixing structure for fixing the phase conductor and a second fixing structure for fixing the neutral conductor.
  • the first fixed structure comprises:
  • a snap structure for clamping a clamping portion of the phase conductor, the clamping portion passing the snap structure
  • the limiting structure is formed at an end of the buckle structure opposite to the housing for limiting the limiting portion of the phase conductor.
  • the snap structure is formed as a protruding structure having a card slot, and the clamping portion of the phase conductor passes through the card slot;
  • the limiting structure is formed with a vertical slot for the insertion and fixing of the limiting portion of the phase conductor.
  • the second fixing structure is formed at a position opposite to the housing of the first fixing structure, and the structure is the same as the first fixing structure.
  • phase conductor and/or the neutral conductor comprise: a connecting portion, a fixing portion, an electronically controlled power supply portion, a power supply output portion, and a sensing portion;
  • the end of the sensing portion forms an input end of the power phase line; the fixing portion is fixed on the housing; the connecting portion is connected between the sensing portion and the fixing portion; the end of the electronically controlled power supply portion is a power supply end, and the power output portion is provided with a power supply Output.
  • phase conductor and/or the neutral conductor comprise: a connecting portion, a clamping portion, a limiting portion, an electronically controlled power supply portion, a power supply output portion, and a sensing portion;
  • the end of the sensing portion forms an input end of the power phase line; the clamping portion is fixed to the buckle structure; the limiting portion is fixed in the limiting structure; the connecting portion is connected between the sensing portion and the fixing portion; and the end of the electronically controlled power supply portion
  • the power output portion is provided with a power output terminal.
  • the sensing portion of the phase conductor is more sensitive than the neutral conductor.
  • clamping portion and the limiting portion of the phase conductor and the neutral conductor, the electronically controlled power supply portion, and the power supply output portion are symmetrically disposed along a center plane of the stacking direction.
  • the insulating spacer includes: a bottom plate formed in a horizontal direction, a center of the bottom plate is formed with a through hole for the sensing portion of each conductor; and a limiting rib that rises from the periphery of the bottom plate.
  • the back surface of the bottom plate is formed with a recess for limiting the phase conductor located above it or the neutral conductor below it.
  • the limit ribs comprise:
  • the first cylindrical rib rises from the edge of the bottom plate at a position symmetrical with the central plane of the first cylindrical groove in the stacking direction;
  • the second cylindrical rib rises from the edge of the bottom plate at a position symmetrical with the plane of the first cylindrical groove in a plane perpendicular to the center plane;
  • the second cylindrical groove rises from the edge of the bottom plate at a position symmetrical with the second cylindrical rib according to the central plane;
  • the first cylindrical rib is embedded in the first cylindrical groove
  • the second cylindrical rib is embedded in the second cylindrical groove
  • the housing comprises: a bottom case and a middle case; a zero-sequence mutual inductance coil is installed under the bottom case; a neutral wire conductor is installed between the middle case and the bottom case; and a current mutual inductance coil is mounted on the middle case .
  • the housing further includes an upper cover that overlies the current mutual inductance coil.
  • a circuit breaker comprising the current transformer described above.
  • a household appliance comprising the above-described circuit breaker.
  • the current transformer of the present application has been described above. According to the above solution of the present application, the two transformer housings are changed to one, which reduces one transformer housing, saves the safety space between the current transformer and the zero-sequence transformer housing on the PCB, and makes the mutual inductance
  • the footprint of the device on the PCB is reduced by more than half.
  • one phase line is reduced, and the power supply interface of the primary winding on the PCB is reduced from six to four, which improves the production efficiency, reduces the hidden trouble of welding, and improves the reliability of the electronic control board.
  • Fig. 1 shows an exploded perspective view of a preferred embodiment of a current transformer according to the present application.
  • Figure 2 shows an assembled perspective view of a preferred embodiment of a current transformer according to the present application.
  • Figure 3 (A) shows a plan front view of the housing of a preferred embodiment
  • Figure 3 (B) shows a plan bottom view of the housing of a preferred embodiment.
  • Fig. 4 shows a cross-sectional view of the casing taken along line B-B in Fig. 3(B).
  • FIG. 5(A) is a plan view showing the assembled structure of the current transformer shown in FIG. 2; and FIG. 5(B) is a cross-sectional view showing the assembled structure taken along line BB shown in FIG. 5(A).
  • Fig. 6(A) is a perspective structural view showing the phase conductor
  • Fig. 6(B) is a front view showing the structure of the phase conductor shown in Fig. 6(A)
  • Fig. 6(C) is shown.
  • Fig. 7(A) is a perspective structural view showing the neutral conductor
  • Fig. 7(B) is a front view showing the structure of the neutral conductor shown in Fig. 7(A)
  • Fig. 7(C) A plan view of the structure of the neutral conductor shown in FIG. 7(A) and a cross-sectional view of the neutral conductor taken along line BB shown in FIG. 7(C) are shown in FIG. 7(D).
  • Fig. 8(A) is an exploded perspective view showing the current transformer according to the present application after the housing and the conductor are removed
  • Fig. 8(B) is an assembled perspective view showing the structure as shown in Fig. 8(A).
  • Fig. 9(A) is a perspective view showing the structure of the insulating spacer
  • Fig. 9(B) shows the back structure of the insulating spacer
  • Fig. 9(C) is a plan view showing the assembly of the insulating spacers.
  • Figure 10 shows an exploded perspective view of the current transformer in accordance with another preferred embodiment of the present application.
  • FIG. 1 shows an exploded perspective view of a preferred embodiment of a current transformer according to the present application
  • FIG. 2 shows an assembled perspective view of a preferred embodiment of a current transformer according to the present application.
  • the current transformer comprises: a housing 3, a zero-sequence mutual inductance coil 2, a current mutual inductance coil 5, an intermediate insulating spacer 4 between the zero-sequence mutual inductance coil and the current mutual inductance coil, and a phase conductor 6 And a neutral conductor 8, the zero-sequence mutual inductance coil 2, the current mutual inductance coil 5 and the intermediate insulating spacer 4 are housed in the housing 3 in an overlapping manner.
  • the sensing portion 65 of the phase conductor 6 shown in FIG.
  • the zero sequence mutual inductance coil 2 simultaneously passes through the zero sequence mutual inductance coil 2 and the current mutual inductance coil 5 (preferably the center), so that the zero sequence mutual inductance coil 2 and the current mutual inductance coil 5
  • the phase conductor 6 is shared; and the sensing portion of the neutral conductor 8 passes through the zero sequence mutual inductance coil 2 (preferably center). That is to say, the center of the zero-sequence mutual inductance coil 2 has the phase conductor 6 and the neutral conductor 8, and the primary winding of the zero-sequence transformer is the phase conductor 6 and the neutral conductor 8; the center of the current mutual inductance coil 5 is only phase
  • the line conductor 6 passes through, and the primary winding of the current transformer is the phase conductor 6.
  • the first pair of pins 31, 32 and the second pair of pins 33, 34 are disposed on the housing 3.
  • the secondary winding of the current mutual inductance coil 5 is connected to the first pair of pins 31 and 32 as an inductive signal output of the current transformer, and the secondary winding of the zero sequence mutual inductance coil 2 is connected to the second pair of pins 33 and 34.
  • the sensing signal output of the zero sequence transformer As the sensing signal output of the zero sequence transformer.
  • the first pair of pins 31 and 32 and the second pair of pins 33 and 34 are connected to the electronic control board.
  • the current transformer further comprises an upper insulating spacer 7 formed on an upper side of the current mutual inductance coil 5 and a lower insulating spacer 1 formed on the zero-sequence mutual inductance coil 2 The underside.
  • the present application is also not limited thereto, and insulation may be achieved by, for example, coating an insulating material on a conductor or a coil.
  • the casing 3 includes a cylindrical outer peripheral wall portion 35 and an inner peripheral wall portion 36 formed in the outer peripheral wall portion 35, and the inner peripheral wall portion 36 extends in the overlapping direction.
  • the current mutual inductance coil 2 and the zero sequence mutual inductance coil 5 are placed between the outer peripheral wall portion 35 and the inner peripheral wall portion 36, and the sensing portion of the phase conductor 6 and the sensing portion of the neutral conductor 8 are located In the inner peripheral wall.
  • a spacer member for example, a vertical spacer 37 extending in the stacking direction is disposed between the sensing portion of the phase conductor 6 and the sensing portion of the neutral conductor 8.
  • Fig. 3(A) shows a plan front view of the housing 3 of a preferred embodiment
  • Fig. 3(B) shows a plan bottom view of the housing of a preferred embodiment.
  • Fig. 4 shows a cross-sectional view of the casing taken along line B-B in Fig. 3(B).
  • 5(A) is a plan view showing the assembled structure of the current transformer shown in FIG. 2
  • FIG. 5(B) is a cross-sectional view showing the assembled structure taken along line BB shown in FIG. 5(A).
  • the vertical partition plate 37 extending in the stacking direction is provided inside the inner peripheral wall portion 36 (preferably at its center position) such that the vertical partition plate 37 and the inner peripheral wall portion 36 are enclosed in two spaces.
  • the cavity as shown in Figure 4, is a first cavity 312 that houses the sensing portion of the phase conductor and the other is a second cavity 310 that houses the sensing portion of the neutral conductor.
  • a horizontal spacing member such as a horizontal partition 38, is disposed inside the outer peripheral wall portion 35 of the casing 3 in a direction perpendicular to the stack, such that the outer periphery of the casing 3
  • the upper and lower cavities are formed in the wall portion 35, that is, the upper portion for accommodating the upper cavity 39 of the current transformer 5 and the lower portion for accommodating the lower cavity 311 of the zero sequence transformer 2.
  • the horizontal spacing member is not necessary, and its form is not limited to the horizontal partition as long as it is advantageous to realize the relative positions of the current mutual inductance coil 5 and the zero sequence mutual inductance coil 2 in the casing 3.
  • a flange or the like formed at a center position in the stacking direction inside the outer peripheral wall portion of the casing 3 may be used.
  • the outer peripheral wall portion 35 of the casing 3 is further formed with a first fixing structure 313 and a second fixing structure 314 for respectively fixing the same.
  • the phase conductor 6 and the neutral conductor 8 are described.
  • the first fixed structure 313 is formed on the right side of the horizontal partition 38, and the fixing structure includes a snap structure 3131 for clamping the clamping portion 67 of the phase conductor 6 passing through in the horizontal direction (as shown in the figure). 5(B); and a limiting structure 3132 formed at an end of the pair of buckles 3131 away from the side of the housing 3 for limiting the phase conductor 6.
  • a snap structure 3131 for clamping the clamping portion 67 of the phase conductor 6 passing through in the horizontal direction (as shown in the figure). 5(B); and a limiting structure 3132 formed at an end of the pair of buckles 3131 away from the side of the housing 3 for limiting the phase conductor 6.
  • the buckle 3131 is, for example, a protruding structure formed with a card slot through which the phase conductor 6 is engaged.
  • the limiting structure 3132 is formed, for example, with a phase conductor.
  • the vertical end portion of the 6 is a limiting structure of the vertical groove in which the limiting portion 68 (shown in Fig. 5(B)) is inserted and fixed.
  • the second fixing structure 314 is disposed at a position away from the side of the first fixing structure 313 away from the housing 3, and has a structure similar to that of the first fixing structure 313 for fixing the neutral conductor 8. It should be noted that the above fixed structure is not limited thereto as long as the phase conductor can be fixed.
  • Fig. 6(A) is a perspective structural view showing the phase conductor
  • Fig. 6(B) is a front view showing the structure of the phase conductor shown in Fig. 6(A)
  • Fig. 6(C) is shown.
  • Fig. 7(A) is a perspective structural view showing the neutral conductor
  • Fig. 7(A) is a perspective structural view showing the neutral conductor
  • FIG. 7(B) is a front view showing the structure of the neutral conductor shown in Fig. 7(A), and Fig. 7(C)
  • FIG. 7(D) A plan view of the structure of the neutral conductor shown in FIG. 7(A) and a cross-sectional view of the neutral conductor taken along line BB shown in FIG. 7(C) are shown in FIG. 7(D).
  • the phase conductor 6 is provided with end portions 61, 62, 63; the end portion 61 is an input end of a power phase line, the end portion 63 is a power phase line output end; and the end portion 62 is As the power supply phase line of the electronic control line.
  • a contact 60 is provided on the output end of the power phase line, which can serve as a static contact for the protection device or as a movable contact for the protection device.
  • the phase conductor includes a sensing portion 65, a connecting portion 66, a clamping portion 67 and a limiting portion 68, an electrically controlled power supply portion 69, and a power supply output portion 610.
  • the sensing portion 65 simultaneously passes through the current mutual inductance coil 5 and the zero sequence mutual inductance coil 2, and forms an input end 61 of the power phase line at the end thereof, the clamping portion 67 and the limiting portion. 68 are respectively fixed to the buckle structure 3131 and the limiting structure 3132 on the casing 3, and the connecting portion 66 is connected between the sensing portion 65 and the clamping portion 67.
  • An end of the electronically controlled power supply unit 69 is the power supply phase line end 62, and the power supply output unit 610 is provided with the power supply phase line output end 63.
  • the neutral conductor 8 has a structure substantially corresponding to the phase conductor 6. Specifically, as shown in FIG. 2, the neutral conductor 8 is provided with end portions 81, 82, 83; the end portion 81 is a power neutral input end, and the end portion 83 is a power neutral output end; The portion 82 is a power supply neutral end of the electronic control line. A contact 80 is provided on the output of the neutral line of the power supply to serve as a static contact for the protection device.
  • the neutral conductor includes a sensing portion 85, a connecting portion 86, a clamping portion 87 and a limiting portion 88, an electronically controlled power supply portion 89, and a power output portion 810. .
  • the sensing portion 85 passes through the zero-order mutual inductance coil 2 and forms the neutral line input terminal 81 at its end.
  • the clamping portion 87 and the limiting portion 88 are respectively fixed to the second fixing structure 314 on the housing 3, and details are not described herein.
  • a connecting portion 86 is connected between the sensing portion 85 and the clamping portion 87.
  • An end of the electronically controlled power supply unit 89 is the power supply neutral line end 82, and the power supply output unit 810 is provided with the power supply neutral line output end 83.
  • the sensing portion 65 of the phase conductor 6 is relatively long to facilitate its simultaneous passage through the center of the zero sequence mutual inductance coil 2 and the current mutual inductance coil 5; the connection portion 66 is in the zero sequence mutual inductance coil 2 and the current mutual inductance coil 5 Above.
  • the sensing portion 85 of the neutral conductor 8 is relatively short, passing only through the center of the zero sequence mutual inductance coil 2; its connection portion 86 is between the zero sequence mutual inductance coil and the current mutual inductance coil.
  • the clamping portion 67/87 of the phase conductor 6 and the neutral conductor 8 and the limiting portion 68/88, the electronically controlled power supply portion 69/89 and the power supply output portion 610/810 follow a vertical center plane (along The center plane of the stacking direction, that is, the plane passing through the center of the thickness direction of the vertical partition plate 37 as shown in Fig. 5(B), is symmetrically disposed.
  • a vertical center plane (along The center plane of the stacking direction, that is, the plane passing through the center of the thickness direction of the vertical partition plate 37 as shown in Fig. 5(B), is symmetrically disposed.
  • the solution of the present application is not limited thereto.
  • Fig. 8(A) is an exploded perspective view showing the current transformer according to the present application after the housing and the conductor are removed
  • Fig. 8(B) is an assembled perspective view showing the structure as shown in Fig. 8(A).
  • Fig. 9(A) is a perspective view showing the structure of the insulating spacer;
  • Fig. 9(B) shows the back structure of the insulating spacer;
  • Fig. 9(C) is a plan view showing the assembly of the insulating spacers.
  • each of the insulating spacers is made of silicone and has a certain elasticity to compensate for the rigid assembly gap between the mutual inductance coil and the housing.
  • each of the insulating spacers 1, 4, and 7 has the same structure and can be coupled to each other.
  • the following insulating spacer 1 is taken as an example, and the structure of the insulating spacer will be described with reference to FIG. Fig. 9(A) is a perspective view showing the structure of the insulating spacer.
  • the insulating spacer has a bottom plate 11 in the horizontal direction, and a through hole 111 is formed in the center of the bottom plate for passing through the inner peripheral wall portion 36 of the housing 3 and the sensing portion of each conductor; Restricted ribs (preferably a plurality of) are erected around the bottom plate 11 (preferably around).
  • Restricted ribs preferably a plurality of
  • the bottom plate 11 is preferably provided with a recess 12 on the back side for limiting the phase conductor located above it or the neutral conductor below it.
  • the four corners of the bottom plate 11 have the limiting ribs of the mutual inductance coil, and the four corner retaining ribs form a surrounding shape slightly smaller than the housing mounting cavity. The limit ribs are described below.
  • one of the four corner ribs is provided with a first cylindrical groove 13 on the insulating spacer.
  • a position rising from the edge of the bottom plate is provided at a position symmetrical with the first cylindrical groove 13 in a center plane in the stacking direction (a plane passing through the center of the vertical partition plate 37 as shown in FIG. 5(B))
  • a cylindrical rib 14 rising from the edge of the bottom plate is provided at a position symmetrical with the first cylindrical groove 13 in a plane perpendicular to the center plane.
  • a second cylindrical groove 16 is provided on the gusset at a position symmetrical with the second cylindrical rib 15 along the center plane.
  • a protrusion 17 is disposed beside the first cylindrical groove 13, and a groove 18 which is vertically penetrated is disposed at a position symmetrical with the vertical center plane.
  • the two insulating spacers are assembled face to face.
  • the first cylindrical rib 14 is fitted into the first cylindrical groove 13
  • the second cylindrical rib 15 is just fitted into the second cylindrical groove 16, thereby forming an assembled state as shown in Fig. 8(B).
  • the height of the square rib of the insulating spacer is slightly smaller than half of the height of the current mutual inductance coil; the depth dimension of each cylindrical groove is equal to the height of the square rib; the height dimension of each cylindrical rib is slightly smaller than the height of the square rib.
  • the diameter of each cylindrical groove is equal to the diameter of each cylindrical rib.
  • the above-mentioned groove column is provided with a side fitting exhaust gap.
  • a trace specification path is set.
  • the projection 17 is just embedded in the recess 18 to form a closed notch 10 as shown in Fig. 9(C).
  • the current mutual inductance coil output line is led out of the notch and goes down the edge of the housing to the bottom of the housing and is wound around the corresponding pin.
  • the mounting and isolation functions of the housing and the insulating spacer can be disassembled and combined, as long as the transformer is stacked and mounted, the footprint on the PCB can be reduced.
  • the phase conductor is used in one line, which is the primary winding of the zero-sequence transformer and the primary winding of the current transformer, so that the parts can be reduced and the reliability can be improved to achieve the purpose of the present application.
  • the specific shape characteristics of the casing, the conductor, the gasket, and the like, the orientation of the upper and lower left and right structures, and the like may be modified according to the specific assembly condition of the applied protection device.
  • a current transformer of another embodiment of the present application is described below.
  • Figure 10 shows an exploded perspective view of the current transformer in accordance with another preferred embodiment of the present application.
  • the current transformer includes: four pins 101, two identical pads 102 and 109, a zero-sequence mutual inductance coil 103, a bottom case 104, a neutral wire conductor 1010, and a middle case. 105.
  • the bottom case 104 is provided with a zero-sequence mutual inductance coil 103 underneath, and below the zero-sequence transformer 103 is a silicone gasket 102.
  • a neutral conductor 1010 is mounted between the middle case 105 and the bottom case 104.
  • a current mutual inductance coil 106 is mounted on the middle casing 105; a silicone gasket 109 is disposed on the current mutual inductance coil 106.
  • a phase conductor 107 is mounted on the silicone gasket 109. Above the phase conductor is an upper cover 108. The upper cover 108 and the bottom case 109 are connected by a snap, and the coils and conductors therein are fixed together.
  • the insulating gasket has a simple shape and can be reduced from three to two; the housing is decomposed into three parts with reference to the embodiment of Fig. 1, namely an upper cover, a middle cover and a bottom case.
  • the current transformer of the present application has been described above. According to the above solution of the present application, the two transformer housings are changed to one, which reduces one transformer housing, saves the safety space between the current transformer and the zero-sequence transformer housing on the PCB, so that the transformer The occupied area on the PCB is reduced by more than half, and a phase line is reduced.
  • the power connection of the primary winding on the PCB is reduced from 6 to 4, which improves the production efficiency and reduces the hidden danger of soldering and improves the power. Control board reliability.

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Abstract

一种断路器及其电流互感器、以及包含该断路器的家用电器，电流互感器包括：壳体(3)、零序互感线圈(2)、电流互感线圈(5)、相线导体(6)和中性线导体(8)；零序互感线圈和电流互感线圈相互叠置地容纳在壳体中；相线导体的感应部(65)同时穿过零序互感线圈和电流互感线圈，以使得零序互感线圈和电流互感线圈共用相线导体；以及中性线导体的感应部穿过零序互感线圈。根据该方案，将两个互感器壳体改为一个，减少了一个互感器壳体，节省了的电流互感器和零序互感器壳体之间在PCB上的安全空间，使得互感器在PCB上的占用面积减少一半以上。

Description

断路器及其电流互感器、以及包含该断路器的家用电器
相关申请
本申请要求2017年09月20日申请的，申请号为201710855351.4，名称为“断路器及其电流互感器、以及包含该断路器的家用电器”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及电路保护技术领域，尤其涉及一种断路器及其电流互感器、以及包含该断路器的家用电器。
背景技术
电弧故障主要来源于电气装置以及与其相连的设备中的绝缘损坏老化或接头松动，是电气线路中常见的安全隐患。家用交流电弧故障断路器(Arc Fault Circuit Interrupters，简称AFCI)通过检测电气装置内的燃弧电流，将燃弧电流与火灾危险动作值比较，超过时切断电源。其中检测电流变化的传感器是非常重要的组成部分。AFCI的传感器为感应电气装置接入端火线中电流变化的电流互感器，其本质上为一个变压器，初级为相线，穿过磁环中心，次级绕组为漆包线绕磁环一定匝数，漆包线两端输出接入控制板。
家用交流剩余电流保护器(residual current operated protective device，简称为RCD)是防止人身触电、电气火灾及电气设备损坏的一种防护措施。其通过检测电气装置内的泄漏电流和由电痕化电流引起的对地燃弧电流而有效降低火灾危险。RCD的传感器为感应相线和中性线的电流差的零序电流互感器。零序互电流感器也是一个变压器；其初级为相线和中性线，穿过磁环中心，次级绕组为漆包线绕磁环一定匝数，漆包线两端输出接入控制板。
以下示出上述电流互感器和零序电流互感器的初级绕组、次级绕组和壳体的结构列表。
Figure PCTCN2018091029-appb-000001
AFCI一般除故障电弧保护外，还集成其他安全保护功能，如集成漏电保护。因此，该装置至少需要2个传感器：零序电流互感器和电流互感器。按一般做法，这2个独立单元各自焊接在控制板上；如2016年8月17日申请公布号为CN105869962A《适于自动化装配的漏电保护器结构》，采用2个互感器壳体。再如，格力洗衣机采用的检测板(30001.8000021MX)也采用2个互感器。每个互感器做成一个单元，每个单元包含初级绕组的电源输入输出接口、磁环以及次级绕组输出的两个接口及其壳体。控制板上设置相对应的互感器安装位置和以上接口焊盘。对于初级绕组，也就是通过磁环的相线或中性线，用橡套软线穿过磁环，这种生产效率低，一致性差，在生产量大的产品，一般不予采用。故目前大多利用裸线固定在互感器壳体上，并焊接到PCB上。
这样，初级绕组共需要2个相线和1个中心线，共6个电源线输入PCB接口，还需要2个互感器壳体安装位置，以及次级绕组4个输出接口。壳体和壳体之间，相线和相线之间，还需要一定的安全距离。不仅占用了较大的PCB占用，导致整个保护装置的体积增大，生产效率也较低。因此，有必要提供一种能够克服上述任一缺陷的集成两种互感器的结构。
发明内容
有鉴于此，本申请提供一种断路器及其电流互感器、以及包含该断路器的家用电器，将两个电流互感器的相线和安装壳体进行功能整合，使更改设计后的结构件承当一物多用的功能。
根据本申请的第一方面，提供一种断路器的电流互感器，包括：壳体、零序互感线圈、电流互感线圈、相线导体和中性线导体；
零序互感线圈和电流互感线圈相互叠置地容纳在壳体中；
相线导体的感应部同时穿过零序互感线圈和电流互感线圈，以使得零序互感线圈和电流互感线圈共用相线导体；以及
中性线导体的感应部穿过零序互感线圈。
进一步优选地，所述的电流互感器还包括：
位于零序互感线圈和电流互感线圈之间的中间绝缘垫片，位于相线导体与电流互感线圈之间的上绝缘垫片。
进一步优选地，所述的电流互感器还包括：
位于零序互感线圈下侧的下绝缘垫片。
进一步优选地，壳体上设置第一对插针和第二对插针；
电流互感线圈的次级绕组连接到第一对插针上，作为电流互感器的感应信号输出端； 以及
零序互感线圈的次级绕组连接到该第二对插针上，作为零序互感器的感应信号输出端。
进一步优选地，壳体包括筒状外周壁部和形成在外周壁部内的沿叠置的方向形成的内周壁部；电流互感线圈和零序互感线圈放置在外周壁部和内周壁部之间，且相线导体的感应部以及中性线导体的感应部位于内周壁部中。
进一步优选地，相线导体的感应部和中性线导体的感应部之间设置有间隔部件。
进一步优选地，间隔部件为沿叠置方向延伸的垂直隔板。
进一步优选地，在所述壳体的外周壁部内侧沿着垂直于所述叠置的方向设置有水平间隔部件，以在所述壳体的所述外周壁部中形成上、下两个腔体，上、下两个腔体中的一个腔体用于容纳电流互感器，上、下两个腔体中的另一个腔体用于容纳零序互感器。
进一步优选地，在内周壁部的内侧设置沿所述叠置的方向延伸的所述垂直隔板，该垂直隔板与内周壁的一个半圆形围成贯通零序互感器安装腔和电流互感器安装腔的一个空腔，该腔为容纳相线导体的感应部；垂直隔板与内周壁的另一个半圆形围成贯通零序互感器安装腔的一个空腔，该腔为容纳中性线导体的感应部。
进一步优选地，外周壁部上还形成有第一固定结构和第二固定结构，第一固定结构用于固定相线导体，第二固定结构用于固定中性线导体。
进一步优选地，第一固定结构包括：
卡扣结构，用于卡紧相线导体的卡紧部，该卡紧部通过该卡扣结构；以及
限位结构，形成在该卡扣结构的与壳体相反侧的端部，用于对相线导体的限位部进行限位。
进一步优选地，卡扣结构形成为突起结构，该突起结构上具有卡槽，相线导体的卡紧部通过卡槽；以及
限位结构形成有供相线导体的限位部插入并固定的垂直槽。
进一步优选地，第二固定结构形成在与第一固定结构的壳体相反侧的位置，且结构与第一固定结构相同。
进一步优选地，相线导体和/或中性线导体包括：连接部、固定部、电控供电部、电源输出部和感应部；
感应部的端部形成电源相线的输入端；固定部固定在壳体上；连接部连接在感应部和固定部之间；电控供电部的端部为供电端，电源输出部设有电源输出端。
进一步优选地，相线导体和/或中性线导体包括：连接部、卡紧部、限位部、电控供电 部、电源输出部和感应部；
感应部的端部形成电源相线的输入端；卡紧部固定在卡扣结构；限位部固定在限位结构；连接部连接在感应部和固定部之间；电控供电部的端部为供电端，电源输出部设有电源输出端。
进一步优选地，相线导体的感应部比中性线导体的感应部长。
进一步优选地，相线导体和中性线导体的卡紧部和限位部、电控供电部和电源输出部沿叠置方向的中心平面对称设置。
进一步优选地，绝缘垫片包括：沿水平方向形成的底板，底板中心形成有用于供各导体的感应部穿过的通孔；以及从底板周边立起的限位筋。
进一步优选地，底板背面形成有凹槽，用于对装配后位于其上方的相线导体或其下方的中性线导体进行限位。
进一步优选地，限位筋包括：
从底板边缘立起的第一圆柱槽；
从底板边缘立起的第一圆柱筋；
从底板边缘立起的第二圆柱筋；以及
从底板边缘立起的第二圆柱槽。
进一步优选地，第一圆柱筋在与该第一圆柱槽按照沿叠置方向的中心平面对称的位置从底板边缘立起；
第二圆柱筋在与第一圆柱槽按照与中心平面垂直的平面对称的位置从底板边缘立起；并且
第二圆柱槽在与第二圆柱筋按照中心平面对称的位置从底板边缘立起；
其中，当两个绝缘垫片相互装配时，第一圆柱筋嵌入到第一圆柱槽里，第二圆柱筋嵌入到第二圆柱槽里。
进一步优选地，壳体包括：底壳和中壳；所述的底壳之下安装零序互感线圈；所述的中壳和底壳之间安装中性线导体；中壳上安装电流互感线圈。
进一步优选地，壳体还包括上盖，上盖覆盖在电流互感线圈的上方。
根据本申请的第二方面，提供一种断路器，包括上述的电流互感器。
根据本申请的第三方面，提供一种家用电器，包括上述的断路器。
以上对本申请的电流互感器进行了描述。根据本申请的上述方案，将两个互感器壳体改为一个，减少了一个互感器壳体，节省了的电流互感器和零序互感器壳体之间在PCB上的安全空间，使得互感器在PCB上的占用面积减少一半以上。并且，减少了一个相线，初 级绕组在PCB上的电源接口由6个减少为4个，提升生产效率的同时，减少了焊接不良的隐患，提高了电控板可靠性。
以下结合附图及具体实施方式对本申请的技术方案做进一步详细的描述，本申请的有益效果将进一步明确。
附图说明
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，用于解释本申请，并不构成对本申请的不当限定。
图1示出了根据本申请所述的电流互感器的一优选实施例的分解立体图。
图2示出了根据本申请所述的电流互感器的一优选实施例的装配立体图。
图3(A)示出了一优选实施例的所述壳体的平面主视图；图3(B)示出了一优选实施例的所述壳体的平面仰视图。
图4示出了沿图3(B)中的B-B线剖得的所述壳体的剖面图。
图5(A)示出了如图2所示的电流互感器的装配结构俯视图；图5(B)示出了沿图5(A)所示的B-B线剖得的所述装配结构的截面图。
图6(A)示出了所述相线导体的立体结构图，图6(B)示出了图6(A)所示的相线导体的结构的主视图，图6(C)示出了图6(A)所示的相线导体的结构的俯视图，以及图6(D)沿图6(C)所示的B-B线剖得的所述相线导体的剖视图。
图7(A)示出了所述中性线导体的立体结构图，图7(B)示出了图7(A)所示的中性线导体的结构的主视图，图7(C)示出了图7(A)所示的中性线导体的结构的俯视图，以及图7(D)沿图7(C)所示的B-B线剖得的所述中性线导体的剖视图。
图8(A)示出了根据本申请的所述电流互感器去掉壳体和导体后的分解立体图，图8(B)示出了如图8(A)所述的结构的装配立体图。
图9(A)示出了绝缘垫片的结构立体图；图9(B)示出了所述绝缘垫片的背面结构；图9(C)示出了各绝缘垫片的装配平面图。
图10示出了根据本申请另一优选实施例的所述电流互感器的分解立体图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合本申请具体实施例及相应的附图对本申请技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做 出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
【第一实施例】
首先结合图1、2描述根据本申请的断路器的电流互感器。图1示出了根据本申请所述的电流互感器的一优选实施例的分解立体图，图2示出了根据本申请所述的电流互感器的一优选实施例的装配立体图。
如图1所述，所述电流互感器包括：壳体3、零序互感线圈2、电流互感线圈5、位于零序互感线圈和电流互感线圈之间的中间绝缘垫片4、相线导体6和中性线导体8，所述零序互感线圈2、电流互感线圈5以及所述中间绝缘垫片4相互叠置地容纳在所述壳体3中。其中，相线导体6的感应部65(如图5(B)所示)同时穿过零序互感线圈2和电流互感线圈5(优选中心)，以使得零序互感线圈2和电流互感线圈5共用所述相线导体6；以及中性线导体8的感应部穿过零序互感线圈2(优选中心)。也就是说，零序互感线圈2中心有相线导体6和中性线导体8通过，零序互感器的初级绕组即是相线导体6和中性线导体8；电流互感线圈5中心只有相线导体6通过，电流互感器的初级绕组即是相线导体6。
其中，如图2所示，壳体3上设置第一对插针31、32和第二对插针33、34。电流互感线圈5的次级绕组连接到第一对插针31和32上，作为电流互感器的感应信号输出，零序互感线圈2的次级绕组连接到该第二对插针33和34上，作为零序互感器的感应信号输出。第一对插针31和32以及第二对插针33和34与电控板连接。
优选地，所述电流互感器进一步包括上绝缘垫片7和下绝缘垫片1，其中上绝缘垫片7形成在电流互感线圈5的上侧，下绝缘垫片1形成在零序互感线圈2的下侧。本申请也可不限于此，还可采用例如，在导体或线圈上涂覆绝缘材料的方式来实现绝缘。
优选地，如图2所示，所述壳体3包括筒状外周壁部35和形成在所述外周壁部35内的内周壁部36，内周壁部36沿所述叠置的方向延伸。所述电流互感线圈2和零序互感线圈5放置在外周壁部35和内周壁部36之间，且所述相线导体6的感应部以及所述中性线导体8的感应部位于所述内周壁部中。以及优选地，间隔部件，例如沿所述叠置方向延伸的垂直隔板37设置在相线导体6的感应部和中性线导体8的感应部之间。
以下结合图3(A)、图3(B)以及图4、图5(A)以及图5(B)进一步描述本申请的电流互感器的所述壳体的一优选实施例的结构。图3(A)示出了一优选实施例的所述壳体3的平面主视图；图3(B)示出了一优选实施例的所述壳体的平面仰视图。图4示出了沿图3(B)中的B-B线剖得的所述壳体的剖面图。图5(A)示出了如图2所示的电流互感器的装配结构俯视图，图5(B)示出了沿图5(A)所示的B-B线剖得的所述装配结构 的截面图。
进一步优选地，在内周壁部36的内侧(优选在其中心位置)设置沿所述叠置方向延伸的所述垂直隔板37，从而该垂直隔板37与内周壁部36围成两个空腔，如图4所示，一个为容纳相线导体的感应部的第一腔312，另一个为容纳中性线导体的感应部的第二腔310。以及进一步优选的，在所述壳体3的外周壁部35内侧沿着垂直于所述叠置的方向设置有水平间隔部件，例如水平隔板38，从而在所述壳体3的所述外周壁部35中形成上、下两个腔体，即上部用于容纳电流互感器5的上腔体39和下部用于容纳零序互感器2的下腔体311。需要指出的是，所述水平间隔部件并非必要的，且其形式也不限于所述水平隔板，只要有利于实现电流互感线圈5和零序互感线圈2在所述壳体3中的相对位置即可，例如可以为在所述壳体3的外周壁部内侧的，沿所述叠置方向的中心位置形成的凸缘等。
以及进一步地，如图3(A)、图5(B)所示，所述壳体3的外周壁部35上还形成有第一固定结构313和第二固定结构314，分别用于固定所述相线导体6和中性线导体8。优选地，水平隔板38上面的右侧，形成所述第一固定结构313，该固定结构包括卡扣结构3131，用于卡紧水平方向通过的相线导体6的卡紧部67(如图5(B)所示)；以及形成在该对卡扣3131的远离壳体3所在侧的端部的限位结构3132，用于相线导体6的限位。如图5(B)所示，所述卡扣3131，例如为形成有供相线导体6卡紧部67通过的卡槽的突起结构，所述限位结构3132例如为形成有供相线导体6的垂直端部即限位部68(如图5(B)所示)插入并固定的垂直槽的限位结构。类似的，在与所述第一固定结构313的远离壳体3所在侧的位置设置有所述第二固定结构314，其结构与第一固定结构313类似，用于固定中性线导体8。需要指出的是，上述固定结构也可不限于此，只要能实现所述相线导体的固定即可。
以下结合图2、图6(A)-(D)、7(A)-(D)描述根据本申请一优选实施例的相线导体6和中性线导体8的结构。图6(A)示出了所述相线导体的立体结构图，图6(B)示出了图6(A)所示的相线导体的结构的主视图，图6(C)示出了图6(A)所示的相线导体的结构的俯视图，以及图6(D)沿图6(C)所示的B-B线剖得的所述相线导体的剖视图。图7(A)示出了所述中性线导体的立体结构图，图7(B)示出了图7(A)所示的中性线导体的结构的主视图，图7(C)示出了图7(A)所示的中性线导体的结构的俯视图，以及图7(D)沿图7(C)所示的B-B线剖得的所述中性线导体的剖视图。
首先如图2所示，所述相线导体6设置有端部61、62、63；端部61为电源相线的输入端，端部63为电源相线输出端；以及端部62为可作为电控线路的供电相线端。电源相线输出端上设置有触点60，可作为保护装置的静触点，也可以作为保护装置的动触点。
接着如图6(A)-6(D)所示，所述相线导体包括感应部65，连接部66，卡紧部67和限位部68，电控供电部69和电源输出部610。如上文所述，感应部65同时穿过所述电流互感线圈5和零序互感线圈2，并在其端部形成所述电源相线的输入端61，所述卡紧部67和限位部68分别固定在壳体3上的卡扣结构3131和限位结构3132上，以及连接部66连接在所述感应部65和卡紧部67之间。所述电控供电部69的端部为所述供电相线端62，所述电源输出部610设有所述电源相线输出端63。
类似的，如图2、7(A)-(D)所示，所述中性线导体8具有与所述相线导体6大致对应的结构。具体地，如图2所示，所述中性线导体8设置有端部81、82、83；端部81为电源中性线输入端，端部83为电源中性线输出端；以及端部82为电控线路的供电中性线端。电源中性线输出端上设置有触点80，可作为保护装置的静触点。
接着如图7(A)-7(D)所示，所述中性线导体包括感应部85，连接部86，卡紧部87和限位部88，电控供电部89和电源输出部810。如上文所述，感应部85穿过零序互感线圈2，并在其端部形成所述中性线输入端81。与相线导体6类似的，所述卡紧部87和限位部88分别固定在壳体3上的第二固定结构314，在此不再赘述。以及连接部86连接在所述感应部85和卡紧部87之间。所述电控供电部89的端部为所述供电中性线端82，所述电源输出部810设有所述电源中性线输出端83。
进一步优选地，相线导体6的感应部65相对较长，以利于其同时穿过零序互感线圈2和电流互感线圈5的中心；其连接部66在零序互感线圈2和电流互感线圈5的上方。中性线导体8的感应部85相对较短，其只穿过零序互感线圈2的中心；其连接部86在零序互感线圈和电流互感线圈之间。
以及进一步优选地，相线导体6和中性线导体8的卡紧部67/87和限位部68/88，电控供电部69/89和电源输出部610/810按照垂直中心平面(沿所述叠置方向的中心平面，即经过如图5(B)所示的垂直隔板37厚度方向的中心的平面)对称设置。但显然本申请的方案也可不限于此。
以下结合图1、图8(A)、图8(B)、以及图9(A)、(B)、(C)说明本申请所述的各垫片的优选实施方式的结构。图8(A)示出了根据本申请的所述电流互感器去掉壳体和导体后的分解立体图，图8(B)示出了如图8(A)所述的结构的装配立体图。图9(A)示出了绝缘垫片的结构立体图；图9(B)示出了所述绝缘垫片的背面结构；图9(C)示出了各绝缘垫片的装配平面图。
如图1、8(A)所示下缘垫片1安装在零序互感线圈2下面；中间绝缘垫片4安装在电流互感线圈5下面；上绝缘垫片7安装在电流互感线圈5上面。中间绝缘垫片4把电流 互感线圈5与中性线导体8进行电气隔离；上绝缘垫片7把电流互感线圈5与相线导体6进行电气隔离，防止互感线圈与导体直接接触因而被电击烧毁短路。优选地，各绝缘垫片由硅胶制成，有一定弹性，以能够补偿互感线圈与壳体之间的刚性装配间隙。
其中，优选地，所述的各绝缘垫片1、4、7结构相同，并能互相配合装接。以下绝缘垫片1为例，结合图9对所述绝缘垫片的结构进行描述。图9(A)示出了所述绝缘垫片的结构的立体图。如图9(A)所示，绝缘垫片的水平方向有一底板11，底板中心形成有通孔111，用于穿过壳体3的所述内周壁部36以及各导体的感应部；以及从所述底板11周边(优选四周)立起的限位筋(优选多个)。如图9(B)所示，底板11优选地在背面设有一凹槽12，用于对装配后位于其上方的相线导体或其下方的中性线导体进行限位。优选地，底板11上面四个角有互感线圈的所述限位筋，四角的限位筋形成的包围外形比壳体安装腔体略小。以下对所述限位筋进行描述。
如图9(A)所述的绝缘垫片，四角筋中的一个上面设置有第一圆柱槽13。在与该第一圆柱槽13按照沿所述叠置方向的中心平面(如图5(B)所示的经过垂直隔板37的中心的平面)对称的位置设置有从底板边缘立起的第一圆柱筋14。在与第一圆柱槽13按照与中心平面垂直的平面对称的位置设置有从底板边缘立起的第二圆柱筋15。在与第二圆柱筋15沿所述中心平面对称的位置的角筋上设置有第二圆柱槽16。以及，第一圆柱槽13的旁边设置有一凸起17，与其沿垂直中心面对称的位置处设置有上下通透的一个凹槽18。
如图8(B)所示，两个绝缘垫片面对面装配。第一圆柱筋14正好镶嵌到第一圆柱槽13里，第二圆柱筋15正好镶嵌到第二圆柱槽16里，从而形成如图8(B)所示的装配状态。
优选地，绝缘垫片的四角筋的高度比电流互感线圈高度的一半略小；各圆柱槽的深度尺寸等于四角筋的高度；各圆柱筋的高度尺寸略小于四角筋的高度。各圆柱槽的直径等于各圆柱筋的直径。
进一步地，为了防止困气影响装配，上述槽柱配合设置了侧边装配排气缺口。
进一步地，设置了走线规范路径。凸起17正好镶嵌到凹槽18里，形成如9(C)所示的封闭缺口10。电流互感线圈输出线从此缺口引出，沿着壳体的边沿向下走到壳体底部，并绕接在对应的插针上。
【第二实施例】
作为替代实施例，壳体和绝缘垫片的安装和隔离功能可以分解和组合，只要保证互感器叠放安装，即可减少其在PCB上的占用面积。同时，相线导体一线两用，既是零序互感器的初级绕组，也是电流互感器的初级绕组，就可以实现零件减少，可靠性提高，达到本 申请的目的。而壳体、导体、垫片等的具体形状特征、上下左右结构方位等可以根据所应用的保护装置具体装配情况而做出相应的更改。以下描述本申请的另一实施例的电流互感器。
图10示出了根据本申请另一优选实施例的所述电流互感器的分解立体图。如图10所示，所述电流互感器包括：4个插针101，两个一样的垫片102和109、零序互感线圈103、一个底壳104、一个中性线导体1010、一个中壳105、一个电流互感线圈106、一个相线导体107、一个上盖108。所述的底壳104，其下安装零序互感线圈103，零序互感器103下面为硅胶垫片102。所述的中壳105和底壳104之间安装中性线导体1010。中壳105上安装电流互感线圈106；电流互感线圈106上面为硅胶垫片109。硅胶垫片109上安装相线导体107。相线导体上面为上盖108。上盖108和底壳109由卡扣连接，把其中的线圈、导体固定在一起。
上述电流互感器中，可以自下而上叠放安装，装配简单。绝缘垫片外形简单，并可以由3个减少为2个；壳体参照图1的实施例分解为三部分，即上盖、中壳和底壳。
以上对本申请的电流互感器进行了描述。根据本申请的上述方案，将两个互感器壳体改为一个，减少了一个互感器壳体，节省了电流互感器和零序互感器壳体之间在PCB上的安全空间，使得互感器在PCB上的占用面积减少一半以上，并且，减少了一个相线，初级绕组在PCB上的电源接口由6个减少为4个，提升生产效率的同时，减少了焊接不良的隐患，提高了电控板可靠性。
以上所述仅为本申请的优选实施例，并不用于限制本申请，对于本领域技术人员而言，本申请可以有各种改动和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (25)

  1. 一种断路器的电流互感器，其特征在于，包括：壳体、零序互感线圈、电流互感线圈、相线导体和中性线导体；
    所述零序互感线圈和电流互感线圈相互叠置地容纳在所述壳体中；
    所述相线导体的感应部同时穿过所述零序互感线圈和电流互感线圈，以使得零序互感线圈和电流互感线圈共用所述相线导体；以及
    所述中性线导体的感应部穿过零序互感线圈。
  2. 如权利要求1所述的电流互感器，其特征在于，还包括：
    位于零序互感线圈和电流互感线圈之间的中间绝缘垫片，位于相线导体与电流互感线圈之间的上绝缘垫片。
  3. 如权利要求1或2所述的电流互感器，其特征在于，还包括：
    位于零序互感线圈下侧的下绝缘垫片。
  4. 如权利要求1-3任一项所述的电流互感器，其特征在于，其中，
    所述壳体上设置第一对插针和第二对插针；
    电流互感线圈的次级绕组连接到第一对插针上，作为电流互感器的感应信号输出端；以及
    零序互感线圈的次级绕组连接到该第二对插针上，作为零序互感器的感应信号输出端。
  5. 如权利要求1-4任一项所述的电流互感器，其特征在于，其中，
    所述壳体包括筒状外周壁部和形成在所述外周壁部内的沿所述叠置的方向形成的内周壁部；所述电流互感线圈和零序互感线圈放置在外周壁部和内周壁部之间，且所述相线导体的感应部以及所述中性线导体的感应部位于所述内周壁部中。
  6. 如权利要求5所述的电流互感器，其特征在于，其中，
    所述相线导体的感应部和所述中性线导体的感应部之间设置有间隔部件。
  7. 如权利要求6所述的电流互感器，其特征在于，其中，
    所述间隔部件为沿所述叠置方向延伸的垂直隔板。
  8. 如权利要求5-7任一项所述的电流互感器，其特征在于，其中，
    在所述壳体的外周壁部内侧沿着垂直于所述叠置的方向设置有水平间隔部件，以在所述壳体的所述外周壁部中形成上、下两个腔体，上、下两个腔体中的一个腔体用于容纳电流互感器，上、下两个腔体中的另一个腔体用于容纳零序互感器。
  9. 如权利要求7或8所述的电流互感器，其特征在于，其中，在内周壁部的内侧设置沿所述叠置的方向延伸的所述垂直隔板，该垂直隔板与内周壁的一个半圆形围成贯通零序互感器安装腔和电流互感器安装腔的一个空腔，该腔为容纳相线导体的感应部；
    垂直隔板与内周壁的另一个半圆形围成贯通零序互感器安装腔的一个空腔，该腔为容纳中性线导体的感应部。
  10. 如权利要求5-9任一项所述的电流互感器，其特征在于，其中，
    所述外周壁部上还形成有第一固定结构和第二固定结构，第一固定结构用于固定所述相线导体，第二固定结构用于固定所述中性线导体。
  11. 如权利要求10所述的电流互感器，其特征在于，其中，
    所述第一固定结构包括：
    卡扣结构，用于卡紧相线导体的卡紧部，该卡紧部通过该卡扣结构；以及
    限位结构，形成在该卡扣结构的与壳体相反侧的端部，用于对所述相线导体的限位部进行限位。
  12. 如权利要求11所述的电流互感器，其特征在于，其中，
    所述卡扣结构形成为突起结构，该突起结构上具有卡槽，所述相线导体的卡紧部通过所述卡槽；以及
    所述限位结构形成有供相线导体的限位部插入并固定的垂直槽。
  13. 如权利要求12所述的电流互感器，其特征在于，其中，
    所述第二固定结构形成在与所述第一固定结构的壳体相反侧的位置，且结构与第一固定结构相同。
  14. 如权利要求1-10任一项所述的电流互感器，其特征在于，其中，
    所述相线导体和/或所述中性线导体包括：连接部、固定部、电控供电部、电源输出部和所述感应部；
    所述感应部的端部形成电源相线的输入端；所述固定部固定在所述壳体上；所述连接部连接在所述感应部和固定部之间；所述电控供电部的端部为供电端，所述电源输出部设有电源输出端。
  15. 如权利要求11-13任一项所述的电流互感器，其特征在于，其中，
    所述相线导体和/或所述中性线导体包括：连接部、所述卡紧部、所述限位部、电控供电部、电源输出部和所述感应部；
    所述感应部的端部形成电源相线的输入端；所述卡紧部固定在所述卡扣结构；所述限位部固定在所述限位结构；所述连接部连接在所述感应部和固定部之间；所述电控供电部 的端部为供电端，所述电源输出部设有电源输出端。
  16. 如权利要求14或15所述的电流互感器，其特征在于，其中，
    相线导体的感应部比中性线导体的感应部长。
  17. 如权利要求15所述的电流互感器，其特征在于，其中，
    相线导体和中性线导体的卡紧部和限位部、电控供电部和电源输出部沿所述叠置方向的中心平面对称设置。
  18. 如权利要求2或3所述的电流互感器，其特征在于，其中，
    绝缘垫片包括：沿水平方向形成的底板，所述底板中心形成有用于供各导体的感应部穿过的通孔；以及从所述底板周边立起的限位筋。
  19. 如权利要求18所述的电流互感器，其特征在于，其中，
    所述底板背面形成有凹槽，用于对装配后位于其上方的相线导体或其下方的中性线导体进行限位。
  20. 如权利要求18或19所述的电流互感器，其特征在于，其中，
    所述限位筋包括：
    从所述底板边缘立起的第一圆柱槽；
    从所述底板边缘立起的第一圆柱筋；
    从所述底板边缘立起的第二圆柱筋；以及
    从所述底板边缘立起的第二圆柱槽。
  21. 如权利要求20所述的电流互感器，其特征在于，其中，
    所述第一圆柱筋在与该第一圆柱槽按照沿所述叠置方向的中心平面对称的位置从所述底板边缘立起；
    所述第二圆柱筋在与第一圆柱槽按照与所述中心平面垂直的平面对称的位置从所述底板边缘立起；并且
    所述第二圆柱槽在与第二圆柱筋按照所述中心平面对称的位置从所述底板边缘立起；
    其中，当两个绝缘垫片相互装配时，所述第一圆柱筋嵌入到所述第一圆柱槽里，所述第二圆柱筋嵌入到所述第二圆柱槽里。
  22. 如权利要求1-21中任一项所述的电流互感器，其特征在于，其中，
    所述壳体包括：底壳和中壳；所述的底壳之下安装零序互感线圈；所述的中壳和底壳之间安装所述中性线导体；所述中壳上安装电流互感线圈。
  23. 如权利要求22所述的电流互感器，其特征在于，其中，
    所述壳体还包括上盖，所述上盖覆盖在所述电流互感线圈的上方。
  24. 一种断路器，其特征在于，包括如权利要求1-23任一项所述的电流互感器。
  25. 一种家用电器，其特征在于，包括如权利要求24所述的断路器。
PCT/CN2018/091029 2017-09-20 2018-06-13 断路器及其电流互感器、以及包含该断路器的家用电器 WO2019056812A1 (zh)

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CN109509626A (zh) * 2018-12-12 2019-03-22 珠海格力电器股份有限公司 互感器组件、电弧故障保护器
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