CN220492375U - Three-way connector - Google Patents

Abstract

The utility model relates to a three-way connector which can be used for converging currents output by micro inverters arranged vertically and horizontally and reducing line loss. The three-way connector comprises an intermediate connecting part and three multi-core inserting parts. Each multi-core plug-in part can be electrically connected to the intermediate connection part, wherein any two multi-core plug-in parts are arranged in the intermediate connection part in a mutually rotationally symmetrical manner, and three multi-core plug-in parts have the same plug-in structure for enabling each multi-core plug-in part to be electrically plugged into any multi-core plug-in head of the bus connector.

Description

Three-way connector

Technical Field

The application relates to the technical field of alternating current connection, in particular to a three-way connector.

Background

In the existing photovoltaic system, the bus T-connector connected with the micro-inverter is usually connected in series through a bus connector, but there is a problem of high line loss. Especially when the setting position of photovoltaic module is irregular, the miniature dc-to-ac converter that is connected with photovoltaic module can only be scattered and arranged, if still adopts current bus T to connect this moment, then needs more bus connector, further aggravates the circuit loss.

Disclosure of Invention

An advantage of the present application is to provide a three-way connector that is capable of converging currents output by micro-inverters arranged vertically and horizontally, reducing line loss.

Another advantage of the present application is to provide a three-way connector, wherein in one embodiment of the present application, the three-way connector can greatly simplify the construction process, and further improve the construction efficiency.

Another advantage of the present application is to provide a three-way connector, wherein in one embodiment of the present application, the three-way connector can electrically connect two bus connectors extending vertically and horizontally without bending the bus connectors, so as to adapt to complex application scenarios.

Another advantage of the present application is to provide a three-way connector, wherein in one embodiment of the present application, the three-way connector makes an operator only need to rotate a plug connector to plug when taking any end of a bus connector, without turning a cable direction, so that a live wire, a neutral wire and a ground wire can be ensured to be connected correspondingly.

Another advantage of the present application is to provide a three-way connector, wherein in one embodiment of the present application, a plurality of ferrules within the three-way connector can be mutually non-staggered, so as to reduce manufacturing difficulty and improve safety performance.

Another advantage of the present application is to provide a three-way connector in which, in one embodiment of the present application, the T-shaped ferrules within the three-way connector can be arranged in parallel to simplify the structure and reduce the device volume.

Another advantage of the present application is to provide a three-way connector in which expensive materials or complex structures are not required in the present application in order to achieve the above objects. Thus, the present application successfully and efficiently provides a solution that not only provides a simple three-way connector, but also increases the practicality and reliability of the three-way connector.

To achieve at least one of the above or other advantages and objects of the present application, there is provided a three-way connector comprising:

an intermediate connection portion; and

and three multi-core plugging portions, each of which is electrically connected to the intermediate connection portion, wherein any two of the multi-core plugging portions are rotationally symmetrically arranged on the intermediate connection portion, and the three multi-core plugging portions have the same plugging structure for enabling each of the multi-core plugging portions to be electrically plugged into any one of the multi-core plugs of the bus connector.

According to one embodiment of the present application, the intermediate connection portion includes an intermediate connection shell, a live wire connection core, a neutral wire connection core, and a ground wire connection core, where the live wire connection core, the neutral wire connection core, and the ground wire connection core are fixed to the intermediate connection shell in an insulated manner; each multi-core plug-in part comprises a multi-core plug-in shell convexly arranged on the middle connecting shell, a fire wire pin electrically connected with the fire wire connecting core, a zero wire pin electrically connected with the zero wire connecting core and a ground wire pin electrically connected with the ground wire connecting core, and the fire wire pin, the zero wire pin and the ground wire pin are mutually and insulatively arranged on the multi-core plug-in shell.

According to one embodiment of the present application, the live, neutral and ground pins in each of the multi-core plug are arranged in a straight line within the multi-core plug housing.

According to one embodiment of the present application, the number of the live, neutral and ground pins in each of the multi-core plug-in parts is one, and the live, neutral and ground pins in each of the multi-core plug-in parts are arranged in a delta within the multi-core plug-in housing.

According to one embodiment of the present application, the number of live pins in each of the multi-core plug-in parts is three, and the number of neutral pins and ground pins in each of the multi-core plug-in parts is one, wherein the live pins, neutral pins and ground pins in each of the multi-core plug-in parts are arranged in a trapezoid within the multi-core plug-in housing.

According to one embodiment of the present application, each of the multicore jack housings is integrally connected to the intermediate connection housing; the live wire pins, the neutral wire pins and the ground wire pins which are positioned on two opposite sides of the middle connecting part are respectively and integrally connected with the live wire connecting core, the neutral wire connecting core and the ground wire connecting core, and the rest of the live wire pins, the neutral wire pins and the ground wire pins can be respectively and conductively inserted into the live wire connecting core, the neutral wire connecting core and the ground wire connecting core.

According to one embodiment of the present application, the live connection core is in the same plane as the corresponding live pins in the three multi-core plug-in parts to form a live plug core; the zero line connecting core and the corresponding zero line pins in the three multi-core plug-in parts are positioned in the same plane to form a zero line plug-in core; the ground wire connecting core and the corresponding ground wire pins in the three multi-core plug-in parts are positioned in the same plane to form a ground wire plug core; the live wire ferrule, the neutral wire ferrule and the ground wire ferrule are stacked at intervals.

According to one embodiment of the present application, the planes of the live wire ferrule, the neutral wire ferrule and the ground wire ferrule are respectively parallel to each other.

According to one embodiment of the present application, each of the multi-core plug housings has a fool-proof structure.

According to one embodiment of the application, each of the multicore jack housings comprises a jack cavity integrally connected with the intermediate connection housing, the jack cavity having a trapezoidal cross section.

According to one embodiment of the application, each of the multicore jack housings comprises a jack cavity integrally connected with the intermediate connection housing, the jack cavity having a live jack cavity accommodating the live pin, a neutral jack cavity accommodating the neutral pin, and a ground jack cavity accommodating the ground pin; at least one of the live wire plug-in cavity, the zero wire plug-in cavity and the ground wire plug-in cavity is provided with a round-edge rectangular section.

According to an embodiment of the present application, the three-way connector further includes three clamping portions, each of which is fixedly connected to the intermediate connection portion, and configured to be clamped to the multi-core plug connector inserted into the multi-core plug portion.

Drawings

FIG. 1 is a schematic application state diagram of a bus connection assembly according to one embodiment of the present application;

FIG. 2 shows an exploded schematic view of a bus connection assembly according to the above-described embodiments of the present application;

FIG. 3 illustrates a first example of a three-way connector in a bus connection assembly according to the above-described embodiments of the present application;

fig. 4 shows an exploded schematic view of a three-way connector according to the above-described first example of the present application;

fig. 5 shows an exploded schematic view of three ferrules in a three-way connector according to the above-described first example of the present application;

fig. 6 shows a schematic front view of a three-way connector according to the above-described first example of the present application;

FIG. 7 shows a schematic A-A cross-sectional view of the three-way connector shown in FIG. 6;

FIG. 8 shows a schematic B-B cross-sectional view of the three-way connector shown in FIG. 6;

fig. 9 shows a schematic right-hand view of a three-way connector according to the first example of the present application;

FIG. 10 shows a schematic C-C cross-sectional view of the three-way connector shown in FIG. 9;

11A, 11B and 11C show side cross-sectional views of three multi-core mating portions in a three-way connector according to the above-described first example of the present application, respectively;

12A, 12B and 12C show side cross-sectional views of three multi-core sockets in a three-way connector according to a second example of the present application, respectively;

13A, 13B and 13C show side cross-sectional views of three multi-core mating portions in a three-way connector according to a third example of the present application, respectively;

FIG. 14 is a schematic diagram of an application of a conventional bus T-connector;

fig. 15 is an application schematic diagram of a three-way connector according to the above embodiment of the present application.

Description of main reference numerals: 10. a three-way connector; 101. a live wire core insert; 102. zero line core insert; 103. a ground wire core insert; 11. an intermediate connection portion; 111. a middle connection shell; 112. a fire wire connecting core; 113. a zero line connection core; 114. a ground wire connecting core; 12. a multi-core plug-in part; 121. a multi-core plug housing; 1211. a live wire plug-in cavity; 1212. a zero line plug-in cavity; 1213. a ground wire plug-in cavity; 122. a live wire pin; 123. a zero line pin; 124. a ground wire pin; 125. a logo assembly; 126. a seal ring; 13. a clamping part; 131. a clamping arm; 20. a bus connector; 21. a multi-core cable; 22. a multi-core plug.

The foregoing main reference numerals and description will be used to further describe the present application in detail with reference to the accompanying drawings and detailed description.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It is noted that when an element is referred to as being "mounted to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

The line loss is exacerbated by the fact that existing bus tee connectors require longer connection cables when connected in series through the bus connector. In order to solve the problem, the present application provides a three-way connector capable of converging currents output by micro-inverters arranged vertically and horizontally, and reducing line loss.

Specifically, referring to fig. 1 and 2, one embodiment of the present application provides a three-way connector 10 for mating with a bus connector 20 to form a bus connection assembly for converging current output by a micro-inverter arranged in a crisscross arrangement. It is to be understood that the bus connector 20 mentioned in the present application includes a multi-core cable 21 and a pair of multi-core plug-ins 22 provided at both left and right ends of the multi-core cable 21, respectively.

More specifically, as shown in fig. 2 and 3, the three-way connector 10 may include an intermediate connection portion 11 and three multicore plugging portions 12. Each of the multicore plugging portions 12 is electrically and fixedly provided to the intermediate connection portion 11, wherein any two of the multicore plugging portions 12 are rotationally symmetrically arranged to each other in the intermediate connection portion 11, and three of the multicore plugging portions 12 have the same plugging structure for enabling each of the multicore plugging portions 12 to be electrically plugged into any one of the multicore plugs 22 of the bus connector 20. It is understood that the same plugging structure mentioned in the present application means that the multiple multi-core plugging portions 12 in the three-way connector 10 can all be matched with the same multi-core plugging head 22 for electrically plugging; for example, the arrangement relationship between the respective components in the three multi-core plug-in portions 12 is the same. Furthermore, the rotationally symmetrical arrangement of the individual multicore plugs 22 mentioned in the present application means that the same multicore plug 22 can be plugged into any multicore plug 12 of the three-way connector 10 in a suitable manner only by rotating it between 0 ° and 360 °.

It should be noted that, since the three multi-core plugging portions 12 of the present application can be electrically plugged into any multi-core plug 22 of the bus connector 20, the three-way connector 10 can be plugged into a plurality of bus connectors 20 extending along different directions, so as to collect the current outputted by the micro-inverter arranged vertically and horizontally, and reduce the line loss. Meanwhile, an operator can take any one end of the bus connector 20 during plugging and can be plugged with any one multi-core plugging part 12 on the three-way connector 10 in an electrified manner without turning the directions of the two ends of the bus connector 20, and further without performing operations such as wire stripping and wiring on the cable during plugging, so that the construction efficiency is greatly improved.

Alternatively, three multi-core plug-in parts 12 in the three-way connector 10 are located at different sides of the intermediate connection part 11 to face in different directions so as to be electrically connected with the current output from the micro-inverter arranged vertically and horizontally without bending the bus connector 20. It is understood that in other examples of the present application, two or three multi-core plugging portions 12 in the three-way connector 10 may also face the same direction, which is not described herein.

Illustratively, in the first example of the present application, as shown in fig. 3 to 10, the intermediate connection part 11 may include an intermediate connection housing 111, a live connection core 112, a neutral connection core 113, and a ground connection core 114, the live connection core 112, the neutral connection core 113, and the ground connection core 114 being fixed to the intermediate connection housing 111 with insulation from each other. Each of the multi-core plug parts 12 may include a multi-core plug housing 121 protruding from the intermediate connection housing 111, a live pin 122 electrically connected to the live connection core 112, a neutral pin 123 electrically connected to the neutral connection core 113, and a ground pin 124 electrically connected to the ground connection core 114, and the live pin 122, the neutral pin 123, and the ground pin 124 are provided to the multi-core plug housing 121 to be insulated from each other. It will be appreciated that the relative arrangement of the hot pin 122, neutral pin 123 and ground pin 124 within the multi-core plug housing 121 is the same for different ones of the multi-core plug sections 12 to ensure that different ones of the multi-core plug sections 12 of the three-way connector 10 are capable of electrically plugging with the same multi-core plug section 22.

Alternatively, as shown in fig. 9, 11A, 11B, and 11C, the live pin 122, the neutral pin 123, and the ground pin 124 in each of the multi-core plug sections 12 are arranged in a straight line within the multi-core plug housing 121; that is, in a side view cross section of the multi-core plug section 12, the live pin 122, the neutral pin 123, and the ground pin 124 are arranged along the same straight line within the multi-core plug housing 121. For example, the hot pin 122, neutral pin 123, and ground pin 124 may be disposed horizontally within the multi-core plug housing 121 to form a straight receptacle. It will be appreciated that the number of the live pin 122, the neutral pin 123, and the ground pin 124 in each of the multi-core plug 12 may be one or more to form a three-core or more plug; for example, each of the multiple core plug sections 12 includes three live pins 122, one neutral pin 123, and one ground pin 124.

Optionally, as shown in fig. 4, 7 and 8, the number of the live pins 122, the neutral pins 123 and the ground pins 124 in each of the multi-core plug 12 is one to form a three-core plug. For example, the ground pin 124 may be located between the hot pin 122 and the neutral pin 123. It is understood that in other examples of the present application, the positional relationship of the live pin 122, the neutral pin 123 and the ground pin 124 may be interchanged, which will not be described herein.

Alternatively, as shown in fig. 5, 7 and 8, each of the multicore jack housings 121 is integrally connected to the intermediate connection housing 111; the live wire pin 122, the neutral wire pin 123 and the ground wire pin 124 which are positioned on two opposite sides of the middle connecting portion 11 are respectively and integrally connected with the live wire connecting core 112, the neutral wire connecting core 113 and the ground wire connecting core 114, and the rest of the live wire pin 122, the neutral wire pin 123 and the ground wire pin 124 are respectively and conductively inserted into the live wire connecting core 112, the neutral wire connecting core 113 and the ground wire connecting core 114 so as to form a detachable inserting core, thereby facilitating the disassembly and assembly of the three-way connector 10. It will be appreciated that in other examples of the present application, three live pins 122, three neutral pins 123, and three ground pins 124 may be integrally connected with the live connection core 112, the neutral connection core 113, and the ground connection core 114, respectively, to form a unitary ferrule.

Alternatively, as shown in fig. 4 and 10, the live connection core 112 is in the same plane as the corresponding live pins 122 in the three multi-core plug 12 to form the live ferrule 101; the zero line connection core 113 and the corresponding zero line pins 123 in the three multi-core plug-in parts 12 are in the same plane to form a zero line plug-in core 102; the ground connection core 114 is in the same plane with the corresponding ground pins 124 in the three multi-core plug 12 to form the ground stub 103; the live wire core insert 101, the neutral wire core insert 102 and the ground wire core insert 103 are stacked at intervals, so that the problem of short circuit caused by contact between any two cores is avoided.

Optionally, the planes of the live wire core insert 101, the neutral wire core insert 102 and the ground wire core insert 103 are respectively parallel to each other, so that the live wire core insert 101, the neutral wire core insert 102 and the ground wire core insert 103 are prevented from being crossed, the manufacturing difficulty of the core insert and the production difficulty of the three-way connector 10 can be reduced, and further the production cost is reduced.

Alternatively, as shown in fig. 4, 5 and 10, the fire wire connection core 112 extends straight from the first fire wire pin 122 to the second fire wire pin 122, and the third fire wire pin 122 is vertically plugged into the fire wire connection core 112 to form the fire wire ferrule 101 having a T-shaped structure; the neutral connection core 113 extends straight from the first neutral pin 123 to the second neutral pin 123, and the third neutral pin 123 is vertically inserted into the neutral connection core 113 to form a neutral ferrule 102 having a T-shaped structure; the ground connection core 114 extends straight from the first ground pin 124 to the second ground pin 124, and the third ground pin 124 is vertically inserted into the ground connection core 114 to form the ground ferrule 103 having a T-shaped structure. It is understood that references herein to extending straight refer to one connecting core extending along the same line as the corresponding two pins.

Optionally, in the above examples of the present application: as shown in fig. 7, 8 and 9, the live pin 122, the neutral pin 123 and the ground pin 124 are parallel to each other; for example, in a multi-core plug 12, the live pin 122, the neutral pin 123, and the ground pin 124 are parallel to each other; the live wire connection core 112, the neutral wire connection core 113 and the ground wire connection core 114 are also parallel to each other to minimize the structural arrangement of the three-way connector 10.

It should be noted that, in order to prevent three-wire misconnection from occurring during wire connection or plugging, as shown in fig. 3, the multi-core plug portion 12 in the three-way connector 10 of the present application may further include a flag assembly 125, where the flag assembly 125 is configured to indicate the live wire position, neutral wire position, and ground wire position, respectively, in the multi-core plug portion 12. It can be understood that, since the three multi-core plugging portions 12 in the three-way connector 10 are rotationally symmetrically disposed on different sides of the intermediate connection portion 11, when an operator takes any one end of the bus connector 20 to plug, only the flag assembly 125 is needed to correspondingly rotate the multi-core plug 22 relative to the multi-core plugging portion 12, so that the live wire, the neutral wire and the ground wire can be ensured to be respectively connected, and the cable direction does not need to be turned to prevent the three-wire misconnection, thereby facilitating the improvement of the construction efficiency.

Alternatively, the logo assembly 125 may be implemented as, but is not limited to, an alphabetic or patterned marking provided on the surface of the multi-core plug housing 121. For example, as shown in fig. 3, the logo assembly 125 of the present application may include an alphabetic designation for designating a live wire, an alphabetic designation for designating a neutral wire, and a pattern designation for designating a ground wire.

Optionally, in order to prevent an operator from misplacing, the multicore plugging housing 121 of the multicore plugging portion 12 in the three-way connector 10 of the present application may have a foolproof structure, so that the operator may plug into any multicore plugging portion 12 in the three-way connector 10 when taking any multicore plug 22 of the bus connector 20, and simultaneously ensure that the live wire, the neutral wire and the ground wire are respectively connected correspondingly, so as to avoid occurrence of three-wire misconnection. In other words, when the multi-core socket 121 has a fool-proof structure, an operator can align three wires without checking the sign assembly 125, so that the construction efficiency is further improved. It can be appreciated that when the three-way connector 10 is designed to be foolproof, the three-way connector 10 of the present application may not need to be provided with the marking component 125, which is not described in detail herein.

Alternatively, as shown in fig. 4, 8 and 9, the multi-core plug housing 121 may have a live plug cavity 1211 that houses the live pin 122, a neutral plug cavity 1212 that houses the neutral pin 123, and a ground plug cavity 1213 that houses the ground pin 124; wherein the live wire plug cavity 1211, the neutral wire plug cavity 1212 and the ground wire plug cavity 1213 all extend through the multi-core plug housing 121 and are not in communication with each other to prevent contact between the live wire pin 122, the neutral wire pin 123 and the ground wire pin 124, thereby reducing the risk of short circuits.

Optionally, as shown in fig. 4 and 9, at least one of the live wire jack cavity 1211, the neutral jack cavity 1212 and the ground wire jack cavity 1213 has a non-centrosymmetric cross section, so that the multi-core jack housing 121 has a foolproof function. For example, at least one of the live wire plug cavity 1211, the neutral wire plug cavity 1212, and the ground wire plug cavity 1213 may have a rounded rectangular cross-section.

Preferably, as shown in fig. 9, 11A, 11B and 11C, the live wire plug cavity 1211, the neutral wire plug cavity 1212 and the ground wire plug cavity 1213 each have a round-sided rectangular cross section, and the round sides of the ground wire plug cavity 1213 are oriented differently from the round sides of the live wire plug cavity 1211 and the neutral wire plug cavity 1212, so that the multi-core plug housing 121 has a fool-proof function.

Alternatively, in other examples of the present application, the multi-core plug housing 121 may have a non-central symmetrical cross section, that is, the multi-core plug housing 121 has a non-central symmetrical shape, which also enables the multi-core plug housing 121 to have a fool-proof function. For example, the multi-core plug housing 121 may have a trapezoidal cross section such that the multi-core plug 22 can only be plugged into the multi-core plug section 12 in a particular direction, avoiding three-wire misconnection.

Optionally, as shown in fig. 3 and 4, the multicore plugging portion 12 of the present application may further include a sealing ring 126 sleeved on the multicore plugging housing 121, so that after the multicore plugging head 22 is plugged with the multicore plugging portion 12, the sealing ring 126 seals a gap between the multicore plugging head 22 and the multicore plugging housing 121, preventing liquids such as rainwater from penetrating into the multicore plugging portion 12, and improving the waterproof performance thereof.

According to the above embodiment of the present application, as shown in fig. 2 and 3, the three-way connector 10 may further include three clamping portions 13, where each clamping portion 13 is fixedly connected to the intermediate connection portion 11 and is used for clamping with the multicore plug 22 plugged into the multicore plug portion 12, so as to ensure that the multicore plug portion 12 and the multicore plug 22 are reliably plugged, and improve the stability of the electrically pluggable connection therebetween.

Alternatively, as shown in fig. 3 and 9, each of the clamping portions 13 may include a pair of clamping arms 131 protruding from the intermediate connection housing 111, and two clamping arms 131 are symmetrically disposed on opposite sides of the multi-core plug portion 12, so as to further enhance the reliability of the plugging between the multi-core plug portion 12 and the multi-core plug 22.

It should be noted that the live pin 122, the neutral pin 123, and the ground pin 124 in each of the multiple-core plug 12 may be arranged in other ways than the straight arrangement in the above example, so long as the bus requirements of the three-way connector 10 can be satisfied.

Illustratively, in the second example of the present application, as shown in fig. 12A, 12B and 12C, the number of the live wire pins 122, the neutral wire pins 123 and the ground wire pins 124 in each of the multi-core plug parts 12 is one to form a three-core plug part. At this time, the live wire pin 122, the neutral wire pin 123 and the ground wire pin 124 in each multi-core plug 12 are arranged in a triangle within the multi-core plug housing 121, so that the multi-core plug 12 can have a foolproof function through the positional relationship between the three core pins, and three-wire misconnection is avoided. It will be appreciated that in this variant of the present application, since the live pin 122, the neutral pin 123 and the ground pin 124 are arranged in a triangular configuration within the multi-core plug housing 121, the multi-core plug housing 121 is able to accurately plug three wires, avoiding three-wire misconnections, even without the provision of a logo assembly and foolproof structure.

Further, in this example of the present application, as shown in fig. 12A, 12B, and 12C, the multi-core plug housing 121 may have a trapezoidal cross section, so that the multi-core plug portion 12 has a dual fool-proof design structure, further improving the safety performance of the three-way connector 10. For example, the multi-core mating shell 121 preferably has a rounded trapezoid cross section or a chamfered trapezoid cross section to facilitate smooth mating.

For example, the live pin 122 and the neutral pin 123 of each of the multiple-core plug 12 are arranged side by side on the multiple-core plug housing 121 near a long side (e.g., bottom side), and the ground pin 124 is positioned on the multiple-core plug housing 121 near a short side (e.g., top side) to reduce the difficulty of designing and manufacturing the multiple-core plug housing 121.

Illustratively, in the third example of the present application, as shown in fig. 13A, 13B and 13C, the number of the neutral pins 123 and the ground pins 124 in each of the multi-core plug parts 12 is one, and the number of the live pins 122 is three to form a five-core plug part. At this time, the live wire pin 122, the neutral wire pin 123 and the ground wire pin 124 in each multi-core plug 12 are arranged in a trapezoid within the multi-core plug housing 121, so that the multi-core plug 12 can have a fool-proof function by the positional relationship between the five-core pins, and the five-wire misconnection is avoided. It will be appreciated that in this variant of the present application, since the live pin 122, the neutral pin 123 and the ground pin 124 are arranged in a trapezoid within the multi-core plug housing 121, the multi-core plug housing 121 is able to accurately plug three wires, avoiding three-wire misconnections, even without providing a logo assembly and foolproof structure.

Also, in this modified example of the present application, as shown in fig. 13A, 13B and 13C, the multi-core plug housing 121 may also have a trapezoidal cross section, so that the multi-core plug portion 12 has a dual fool-proof design structure, further improving the safety performance of the three-way connector 10. For example, three of the live pins 122 in each of the multiple-core plug sections 12 are arranged side by side in a region of the multiple-core plug housing 121 near a long side (e.g., a bottom side), and the neutral pins 123 and the ground pins 124 are arranged side by side in a region of the multiple-core plug housing 121 near a short side (e.g., a top side), so as to reduce the difficulty in designing and manufacturing the multiple-core plug housing 121.

Preferably, the live pin 122, the neutral pin 123 and the ground pin 124 in each of the multi-core plug parts 12 are arranged in a staggered manner along a certain direction (up-down direction in fig. 13A) within the multi-core plug housing 121, so as to ensure that the planes of three of the live pins 101, one of the neutral pins 102 and one of the ground pins 103 in the three-way connector 10 are respectively parallel to each other.

It is noted that fig. 14 shows a schematic diagram of an application of the existing bus T-joint 10P; fig. 15 shows a schematic application diagram of the three-way connector 10 according to the above-described embodiment of the present application. Specifically, as shown in fig. 14, in the conventional system solution, six micro-inverters W need to use six bus T-junctions 10P, six bus connectors 20 and one sealing cover when networking; as shown in fig. 15, in the system scheme of the present application, only five three-way connectors 10 and five bus connectors 20 are required for assembling six micro-inverters W. In other words, compared with the existing system scheme, the system scheme of the application can reduce one three-way connector 10, one bus connector 20 and one sealing cover, shorten the cable length and remarkably reduce the system cost.

Furthermore, since the line loss power p=i of the ac cable ² R, wherein I is cable current, R is cable resistance; and the resistance r=ρ×l/S of the alternating current cable, where ρ is the resistivity, L is the cable length, S is the cable cross-sectional area; thus, as shown in fig. 14, the ac loss P original=r+4 r+9r+16r+25r+36r=91R in the line in the conventional system scheme; the ac loss of the lines ppt=4 r+4 r+9r+9r+36r=62r in the system scheme of the present application as shown in fig. 15. In other words, in the case that the number of the micro-inverters is constant and the cable type and the length are the same, the present applicationThe line loss in the system scheme is smaller than that in the existing system scheme, namely the system scheme can better reduce the loss of an alternating current line. It will be appreciated that the multi-core cable 21 in the bus connector 20 referred to herein may be copper wire (having a resistivity of 0.0175 Ω×m) or aluminum wire (having a resistivity of 0.0283 Ω×m).

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not thereby to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (12)

1. The tee connector is characterized by comprising:

an intermediate connection part (11); and

three multicore plugs (12), each multicore plug (12) being electrically connectable to the intermediate connection (11), wherein any two multicore plugs (12) are arranged rotationally symmetrically to each other in the intermediate connection (11), and the three multicore plugs (12) have the same plug structure for enabling each multicore plug (12) to be electrically plugged into any multicore plug (22) of the bus connector (20).

2. The three-way connector according to claim 1, wherein the intermediate connection portion (11) includes an intermediate connection housing (111), a live connection core (112), a neutral connection core (113), and a ground connection core (114), the live connection core (112), the neutral connection core (113), and the ground connection core (114) being secured to the intermediate connection housing (111) so as to be insulated from each other; each multi-core plug-in part (12) comprises a multi-core plug-in shell (121) protruding from the middle connection shell (111), a live wire plug-in pin (122) electrically connected with the live wire connection core (112), a neutral wire plug-in pin (123) electrically connected with the neutral wire connection core (113) and a ground wire plug-in pin (124) electrically connected with the ground wire connection core (114), and the live wire plug-in pin (122), the neutral wire plug-in pin (123) and the ground wire plug-in pin (124) are mutually insulated and arranged in the multi-core plug-in shell (121).

3. The three-way connector according to claim 2, characterized in that the live pin (122), neutral pin (123) and ground pin (124) in each multi-core plug-in section (12) are arranged in a straight line within the multi-core plug-in housing (121).

4. The three-way connector according to claim 2, wherein the number of live pins (122), neutral pins (123) and ground pins (124) in each of the multi-core plug-in sections (12) is one, and the live pins (122), neutral pins (123) and ground pins (124) in each of the multi-core plug-in sections (12) are arranged in a delta within the multi-core plug-in housing (121).

5. The three-way connector according to claim 2, wherein the number of live pins (122) in each of the multi-core plug-in parts (12) is three, and the number of neutral pins (123) and ground pins (124) in each of the multi-core plug-in parts (12) is one, wherein the live pins (122), neutral pins (123) and ground pins (124) in each of the multi-core plug-in parts (12) are arranged in a trapezoid within the multi-core plug-in housing (121).

6. The three-way connector according to any one of claims 2 to 5, characterized in that each multi-core plug housing (121) is integrally connected to the intermediate connection housing (111); the live wire pins (122), the neutral wire pins (123) and the ground wire pins (124) which are positioned on two opposite sides of the middle connecting part (11) are respectively and integrally connected with the live wire connecting core (112), the neutral wire connecting core (113) and the ground wire connecting core (114), and the rest of the live wire pins (122), the neutral wire pins (123) and the ground wire pins (124) are respectively and conductively inserted into the live wire connecting core (112), the neutral wire connecting core (113) and the ground wire connecting core (114).

7. The three-way connector according to any one of claims 2 to 5, wherein the live connection core (112) is in the same plane as the corresponding live pins (122) in three of the multi-core plug-ins (12) to form a live ferrule (101); the zero line connecting core (113) and the corresponding zero line pins (123) in the three multi-core plug-in parts (12) are positioned in the same plane to form a zero line plug-in core (102); the ground wire connecting core (114) and the corresponding ground wire pins (124) in the three multi-core plug-in parts (12) are positioned in the same plane to form a ground wire plug-in core (103); the live wire ferrule (101), the neutral wire ferrule (102) and the ground wire ferrule (103) are stacked at intervals.

8. The three-way connector according to claim 7, wherein the planes of the live wire ferrule (101), the neutral wire ferrule (102) and the ground wire ferrule (103) are respectively parallel to each other.

9. The three-way connector according to any one of claims 2 to 5, characterized in that each of the multi-core plug housings (121) has a foolproof structure.

10. The three-way connector according to claim 9, wherein each of the multicore mating shells (121) has a trapezoidal cross section.

11. The three-way connector of claim 9, wherein each of the multi-core plug housings (121) has a live plug cavity (1211) that houses the live pin (122), a neutral plug cavity (1212) that houses the neutral pin (123), and a ground plug cavity (1213) that houses the ground pin (124); at least one of the live wire plug cavity (1211), the neutral wire plug cavity (1212) and the ground wire plug cavity (1213) has a rounded rectangular cross section.

12. The three-way connector according to any one of claims 1 to 5, further comprising three clamping portions (13), each clamping portion (13) being fixedly connected to the intermediate connection portion (11) for clamping with the multicore plug connector (22) plugged into the multicore plug portion (12).