Mutual inductor and electrical equipment

Abstract

The utility model relates to a mutual inductor and electrical equipment, and relates to the technical field of high-low voltage electrical appliances, the mutual inductor is provided with a detection through hole, an electric conductor penetrates through the detection through hole, the mutual inductor comprises a detection assembly and a shell, the detection assembly surrounds the outer peripheral side of the electric conductor, and the detection assembly is used for detecting the electric conductor; the shell comprises a first shell and a second shell, the first shell and the second shell define a containing cavity, the containing cavity surrounds the detection through hole, and the detection assembly is located in the containing cavity; the first shell is provided with at least one first isolation wall, the second shell is provided with at least one second isolation wall, the first isolation wall and the second isolation wall are both of an annular structure, and at least parts of the first isolation wall and the second isolation wall are mutually sleeved. According to the mutual inductor, the problem that creepage breakdown is likely to happen at the joint of the shell of the mutual inductor, and use and safety are affected can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of high and low voltage electrical appliances, and in particular to a mutual inductor and electrical equipment. Background Art

[0002] When a universal circuit breaker is in use, in order to detect and protect the circuit, it is usually necessary to install a transformer in the main circuit, and use the transformer to sense and detect the circular magnetic field around the main circuit conductor.

[0003] In the related art, a detection hole is provided in the middle of the transformer, and the transformer detects the main circuit conductor when it passes through the detection hole, but the shell of the transformer forms a joint position in the middle of the detection hole, and when assembled, the two parts of the shell are provided with a step structure 10 at the joint position to cooperate with each other to ensure airtightness. However, when the above structure is applied to high voltage occasions, the high voltage on the main circuit conductor may creep along the gap of the step structure 10, causing overvoltage breakdown inside the transformer, affecting the use and safety of the transformer. Utility Model Content

[0004] The purpose of the present application is to provide a transformer and an electrical device, which can solve the problem that creepage breakdown is prone to occur at the joint of the transformer housing, affecting the use and safety.

[0005] In order to achieve the above-mentioned object, according to the first aspect of the present application, an embodiment of the present application provides a mutual inductor having a detection through hole, wherein a conductor is inserted into the detection through hole, and the mutual inductor comprises:

[0006] A detection component, surrounding the outer circumference of the conductor, and the detection component is used to detect the conductor;

[0007] A housing, comprising a first housing and a second housing, wherein the first housing and the second housing are enclosed to form a receiving cavity, the receiving cavity surrounds the detection through hole, and the detection component is located in the receiving cavity;

[0008] The first shell is provided with at least one first isolation wall, and the second shell is provided with at least one second isolation wall. Both the first isolation wall and the second isolation wall are annular structures, and the first isolation wall and the second isolation wall are at least partially nested with each other.

[0009] Based on the above-mentioned embodiments of the present application, the first shell and the second shell are enclosed to form a shell, and the detection component is arranged in the accommodating cavity in the shell. When in use, the conductor passes through the detection through hole, and the detection component surrounds the conductor to detect its electrical energy parameters. At the same time, in the present application, the first isolation wall and the second isolation wall are respectively arranged on the first shell and the second shell, and the first isolation wall and the second isolation wall are mutually nested. Compared with the step structure at the shell joint in the prior art, the creepage path at this time is improved from the step surface in the prior art to the overlapping part between the first isolation wall and the second isolation wall in this solution, thereby increasing the creepage distance from the conductor to the inside of the shell, avoiding creepage breakdown at the shell joint, and thus improving the safety of the transformer when in use.

[0010] In some embodiments, the first partition wall and the second partition wall are each provided with one, and the first partition wall is sleeved on the second partition wall; or

[0011] The first partition wall and the second partition wall are each provided with one, and the second partition wall is sleeved on the first partition wall; or,

[0012] There is one first partition wall, and there are two second partition walls, and the first partition wall is inserted into the gap between the two second partition walls; or

[0013] Two first isolation walls are provided, and one second isolation wall is provided, and the second isolation wall is inserted into the gap between the two first isolation walls.

[0014] Based on the above-mentioned embodiments of the present application, both the first isolation wall and the second isolation wall may be provided with one or more, and the first isolation wall and the second isolation wall are nested with each other, thereby further extending the creepage distance.

[0015] In some embodiments, each of the first isolation wall and the second isolation wall is provided with one, the first isolation wall is sleeved on the second isolation wall, the first isolation wall is located in the accommodating cavity, the end of the first isolation wall abuts against the inner wall of the second outer shell, and the end of the second isolation wall abuts against the inner wall of the first outer shell.

[0016] Based on the above-mentioned embodiments of the present application, at this time, the overlapping distance between the first isolation wall and the second isolation wall reaches the maximum, thereby maximizing the creepage distance.

[0017] In some embodiments, a heat sink is provided on the outer circumferential surface of the housing, at least one heat dissipation channel is provided in the heat sink, and at least one first heat dissipation hole is provided in each of the heat dissipation channels;

[0018] At least one second heat dissipation hole communicating with the accommodating cavity is arranged on the first shell and / or the second shell, the heat dissipation element covers the second heat dissipation hole, and each of the second heat dissipation holes is communicated with one of the heat dissipation channels.

[0019] Based on the above-mentioned embodiments of the present application, the accommodating cavity is connected with the outside through the second heat dissipation hole, the heat dissipation channel and the first heat dissipation hole in sequence, thereby improving the heat dissipation efficiency.

[0020] In some embodiments, the heat sink is connected to the second housing and is integrally provided, and the second heat dissipation hole is provided in the first housing; or,

[0021] The heat sink is connected to the first shell and is integrally arranged therewith, and the second heat dissipation hole is opened in the second shell.

[0022] Based on the above-mentioned embodiments of the present application, by integrating the heat sink with the housing, the connection strength is ensured while facilitating processing.

[0023] In some embodiments, two ends of the heat dissipation channel are connected to form two first heat dissipation holes, and the second heat dissipation hole is connected to the middle of the heat dissipation channel.

[0024] Based on the above-mentioned embodiments of the present application, there is a bend in the heat dissipation filter between the second heat dissipation hole and the first heat dissipation hole, so as to prevent foreign matter from entering the accommodating cavity through the heat dissipation channel while ensuring the heat dissipation effect.

[0025] In some embodiments, at least one first support column and at least one second support column are disposed on the inner side of the first shell and / or the second shell;

[0026] The first support column can abut against and support the fast saturation coil in the detection component, and the second support column can abut against and support the silicon steel sheet in the detection component.

[0027] Based on the above-mentioned embodiments of the present application, a first support column and a second support column are provided to support the quick saturation coil and the silicon steel sheet respectively, replacing the gluing and other processes in the prior art, thereby simplifying the assembly process and facilitating subsequent maintenance and disassembly.

[0028] In some embodiments, the length of the first support column is shorter than the length of the second support column.

[0029] Based on the above-mentioned embodiments of the present application, since the fast saturation coil is sleeved on the silicon steel sheet, the length of the first support column is set shorter than the length of the second support column, which can ensure that both the first support column and the second support column can achieve good supporting effects.

[0030] In some embodiments, the first support column and the second support column are both disposed on the first housing, at least two first support columns are disposed, and at least two first support columns are adapted to the shape of the fast saturation coil;

[0031] At least two second support columns are provided, and the arrangement of the at least two second support columns is adapted to the shape of the silicon steel sheet.

[0032] Based on the above-mentioned embodiments of the present application, a plurality of first support columns support the fast saturation coil along its shape, thereby improving the supporting effect for the fast saturation coil. Similarly, a plurality of second support columns are provided to improve the supporting effect for the silicon steel sheet.

[0033] According to a second aspect of the present application, an electrical device is provided, the electrical device comprising the above-mentioned mutual inductor.

[0034] Based on the above embodiments of the present application, the detection and protection functions of the circuit breaker are realized by setting the above mutual inductor.

[0035] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application but do not constitute a limitation to the present application. In the accompanying drawings:

[0037] Figure 1 It is an exploded schematic diagram of a current transformer in the prior art.

[0038] Figure 2 It is a cross-sectional schematic diagram of a current transformer in the prior art.

[0039] Figure 3 It is an exploded schematic diagram of a current transformer provided in an embodiment of the present application.

[0040] Figure 4 It is a structural schematic diagram of a current transformer provided in an embodiment of the present application.

[0041] Figure 5 yes Figure 4 Enlarged schematic diagram of part A.

[0042] Description of Reference Numerals

[0043] 1. Detection component; 11. Hollow coil; 12. Quick saturation coil; 13. Silicon steel sheet; 2. Shell; 21. First shell; 211. First partition wall; 22. Second shell; 221. Second partition wall; 23. Accommodating cavity; 24. Buckle; 25. Slot; 3. Detection through hole; 4. Heat sink; 41. Heat dissipation channel; 42. First heat dissipation hole; 43. Second heat dissipation hole; 51. First support column; 52. Second support column; 10. Step structure. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0047] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0048] In the description of this application, it should be noted that, in the absence of any contrary explanation, the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0049] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] In the related art, reference Figure 1 and Figure 2 As shown in the figure, when the transformer is in use, there is a joint position on the shell outside the conductor, and a step structure is usually provided at the joint position to ensure airtightness. However, when the above transformer structure is applied to high voltage working conditions, the high voltage on the conductor may creep along the gaps between the step structure, causing creepage breakdown at the joint position of the shell, which not only affects the normal use of the transformer, but also causes safety problems.

[0051] To solve the above technical problems, please refer to Figure 3-5 As shown in, an embodiment of the present application provides a mutual inductor, which has a detection through hole 3, in which a conductor is passed. In addition, the mutual inductor also includes a detection component 1 and a shell 2. The detection component 1 surrounds the outer peripheral side of the conductor and is used to detect the conductor. The shell 2 includes a first shell 21 and a second shell 22. The first shell 21 and the second shell 22 are enclosed to form a accommodating cavity 23. The accommodating cavity 23 surrounds the detection through hole 3, and the detection component 1 is in the accommodating cavity 23; at least one first isolation wall 211 is provided on the first shell 21, and at least one second isolation wall 221 is provided on the second shell 22. The first isolation wall 211 and the second isolation wall 221 are both annular structures, and the first isolation wall and the second isolation wall 221 are at least partially arranged on each other.

[0052] Based on the above embodiments provided by the present application, the first isolation wall 211 and the second isolation wall 221 are mutually nested, so that the double-layer isolation structure formed by the cooperation of the first isolation wall 211 and the second isolation wall 221 replaces the step structure 10 in the related art. At this time, the creepage path of the conductor is replaced by the step surface in the related art with the overlapped part of the first isolation wall 211 and the second isolation wall 221 in the present application, and the overlapped part of the first isolation wall 211 and the second isolation wall 221 when they are nested is larger than the size of the original step structure 10, thereby extending the creepage distance, thereby avoiding creepage breakdown at the joint position of the shell 2, avoiding affecting the normal use of the transformer, and improving the safety of the transformer when in use. In specific use, the overlap distance of the first isolation wall 211 and the second isolation wall 221 can be designed according to the actual creepage distance requirements, and the present application does not make specific restrictions on this.

[0053] Specifically, when in use, the detection component 1 including structures such as the fast saturation coil 12 and the hollow coil 11 is located in the accommodating cavity 23, and the conductor is located between the detection components 1 when it passes through the detection through hole 3. At the same time, the double-layer isolation structure formed by the first isolation wall 211 and the second isolation wall 221 is located between the detection component 1 and the conductor to play the role of insulation and sealing. At this time, the creepage path is from the conductor to the overlapping part of the first isolation wall 211 and the second isolation wall 221 and then to the detection component 1, thereby extending the creepage distance.

[0054] In addition, the transformer in the present application may be a current transformer or a voltage transformer, and the present application does not impose any specific limitation on this.

[0055] Further, refer to Figure 3 and Figure 4 As shown in , in an exemplary embodiment provided by the present application, when the mutual inductor is set as a current mutual inductor, the detection component 1 may include structures such as a fast saturation coil 12, a silicon steel sheet 13 and a hollow coil 11. The hollow coil 11 may be set as a circular structure, one end of the silicon steel sheet 13 may be set as a semicircular arc, and the other three sides may be set as straight sides. During assembly, the fast saturation coil 12 is sleeved on a straight side of the silicon steel sheet 13 that is symmetrical to the semicircular arc side, and the fast saturation coil 12 and the hollow coil 11 are respectively sleeved on the outer periphery of the first isolation wall 211 and the second isolation wall 221. In addition, in some other embodiments, the structure and assembly method of the detection component 1 may also select any suitable design. Since the present application does not involve specific improvements to the structure of the mutual inductor detection component 1, it will not be repeated here.

[0056] When the detection component 1 is used, when the conductor passes through the detection through hole 3, the annular magnetic field around the conductor passes through the cross section of the hollow coil 11, thereby inducing a millivolt voltage signal in the hollow coil 11, and then the voltage signal is transmitted to the controller, which calculates the current of the conductor to achieve current detection of the conductor. At the same time, when the conductor passes through the silicon steel sheet 13, the surrounding magnetic field magnetizes the annular circuit of the silicon steel sheet 13, and the magnetic flux of the silicon steel sheet 13 passes through the cross section of the fast saturation coil 12, thereby inducing a volt-level voltage to supply the backup power supply line of the intelligent controller, and the fast saturation coil 12 can also suppress instantaneous response and protect the electrical system, making the detection result more accurate.

[0057] It should be noted that in the present application, the shape of the detection through hole 3 can be designed to be any suitable shape, such as a circular, rectangular or triangular shape, etc. Any suitable design can be selected based on factors such as the shape of the conductor and the processing method of the detection through hole 3. The present application does not impose any specific restrictions on this.

[0058] In the present application, the number and specific matching method of the first isolation wall 211 and the second isolation wall 221 can be selected into any suitable design according to actual needs, and the present application does not impose any specific limitation on this.

[0059] refer to Figure 3 and Figure 4 As shown in , in an exemplary embodiment provided in the present application, a first isolation wall 211 and a second isolation wall 221 are each provided with one, and the first isolation wall 211 is sleeved on the outside of the second isolation wall 221, or the second isolation wall 221 can be sleeved on the outside of the first isolation wall 211.

[0060] Specifically, when the first isolation wall 211 is sleeved inside the second isolation wall 221, the creepage path at this time is from the conductor to the end of the first isolation wall 211, then passes through the overlapping portion of the first isolation wall 211 and the second isolation wall 221, and finally crawls out from the end of the second isolation wall 221; and when the first isolation wall 211 is sleeved outside the second isolation wall 221, the creepage path at this time is from the conductor to the end of the second isolation wall 221, then passes through the overlapping portion of the first isolation wall 211 and the second isolation wall 221, and finally crawls out from the end of the first isolation wall 211 to the inside of the accommodation cavity 23. As can be seen from the above, in this process, by enlarging the overlapping portion between the first isolation wall 211 and the second isolation wall 221 by sleeve-mounting them, the effect of extending the creepage distance can be achieved.

[0061] In another exemplary embodiment provided in the present application, two first isolation walls 211 may be provided, one second isolation wall 221 may be provided, and the second isolation wall 221 may be inserted into the gap between the two first isolation walls 211; or two second isolation walls 221 may be provided, one first isolation wall 211 may be provided, and the first isolation wall 211 may be inserted into the gap between the two second isolation walls 221.

[0062] Specifically, when a second isolation wall 221 is plugged into the gap between two first isolation walls 211, the creepage path at this time is from the conductor to the end of the inner first isolation wall 211, and then passes through the overlapping part of the inner first isolation wall 211 and the second isolation wall 221 to reach the end of the second isolation wall 221, and finally from the end of the second isolation wall 221 through the overlapping part of the second isolation wall 221 and the outer first isolation wall 211 to reach the end of the outer first isolation wall 211, and finally crawls out to reach the inside of the accommodating cavity 23; and when a first isolation wall 211 is plugged into the gap between two second isolation walls 221, the creepage path needs to pass through the overlapping part of the inner second isolation wall 221 and the first isolation wall 211 and the overlapping part of the first isolation wall 211 and the outer second isolation wall 221 in turn. It can be seen from the above that the creepage distance can be extended to a greater extent by increasing the overlapping portion between the first isolation wall 211 and the second isolation wall 221. For example, if the overlapping portion between the two is increased by 3 mm without changing other conditions, the creepage path will be extended by 6 mm.

[0063] In some other embodiments of the present application, the first isolation wall 211 and the second isolation wall 221 can also be set to multiple, for example, three, four, five, etc. During assembly, the first isolation wall 211 and the second isolation wall 221 are plugged into each other. Specifically, any suitable design can be selected based on factors such as creepage requirements and processing conditions, and the present application does not impose any specific restrictions on this.

[0064] Specifically, at this time, the creepage path from the conductor to the accommodating cavity 23 needs to pass through the overlapping portion between any adjacent first isolation walls 211 and second isolation walls 221, thereby extending the creepage distance by expanding the overlapping portion between the first isolation walls 211 and the second isolation walls 221. During the specific production and processing process, the number of first isolation walls 211 and second isolation walls 221 can be selected according to the creepage requirements, so that the shell 2 structure can meet the creepage requirements and be easy to produce and process.

[0065] Based on the above embodiments provided in the present application, the first isolation wall 211 and the second isolation wall 221 are nested with each other, and the first isolation wall 211 and the second isolation wall 221 after being nested with each other may also be at least partially attached.

[0066] In addition, it should be noted that when setting the creepage distance in specific use, the influence of the thickness of the first isolation wall 211 and the second isolation wall 221 on the creepage distance should also be considered. For example, when the first isolation wall 211 and the second isolation wall 221 are both set to one, the creepage path needs to pass through the ends of the first isolation wall 211 and the second isolation wall 221 respectively; and when there are two first isolation walls 211 and one second isolation wall 221, the creepage path needs to pass through the end of the first isolation wall 211 twice and the end of the second isolation wall 221 once. Conversely, when there is one first isolation wall 211 and two second isolation walls 221, the creepage path needs to pass through the end of the first isolation wall 211 once and the end of the second isolation wall 221 twice.

[0067] Therefore, in specific use, the first isolation wall 211 and the second isolation wall 221 can be set to any suitable thickness according to the creepage distance requirements and combined with factors such as structural strength requirements. Since this application does not involve improvements in this aspect, they will not be described here.

[0068] refer to Figure 3 and 4 As shown in , in an embodiment provided in the present application, a first isolation wall 211 and a second isolation wall 221 are both provided, the first isolation wall 211 is sleeved in the second isolation wall 221, the first isolation wall 211 is in the accommodating cavity 23, the end of the first isolation wall 211 abuts against the inner wall of the second outer shell 22, and the end of the second isolation wall 221 abuts against the inner wall of the first outer shell 21.

[0069] Based on the above embodiment provided in the present application, the first isolation wall 211 and the second isolation wall 221 completely overlap, so that the space in the accommodating cavity 23 can be used as much as possible to extend the creepage distance without changing the size of the shell 2, thereby improving the safety of the device.

[0070] refer to Figure 4 and Figure 5 As shown in, in an embodiment provided in the present application, a heat sink 4 is provided on the outer peripheral surface of the shell 2, at least one heat dissipation channel 41 is provided in the heat sink 4, and at least one first heat dissipation hole 42 is provided on each heat dissipation channel 41; at least one second heat dissipation hole 43 connected to the accommodating cavity 23 is provided on the shell 2, the heat sink 4 covers the second heat dissipation hole 43, and each second heat dissipation hole 43 is connected to a heat dissipation channel 41.

[0071] Based on the above embodiments provided in the present application, the accommodating cavity 23 is connected to the outside through the second heat dissipation hole 43, the heat dissipation channel 41 and the first heat dissipation hole 42 in sequence, thereby accelerating the air circulation between the accommodating cavity 23 and the outside, thereby improving the heat dissipation effect.

[0072] In the present application, the number and position of the heat sink 4 and the second heat dissipation holes 43 can be any suitable design, and the present disclosure does not impose any specific limitation on this.

[0073] Specifically, refer to Figure 4 and Figure 5 As shown, in an exemplary embodiment of the present application, the heat sink 4 can be arranged on the second housing 22, and the number of heat dissipation channels 41 and the number of first heat dissipation holes 42 of the heat sink 4 can be selected to be any suitable number. For example, each heat sink 4 can be provided with one, two, three or even multiple heat dissipation channels 41, and each heat dissipation channel 41 can also be provided with one, two, three or even multiple first heat dissipation holes 42. The specific number of heat dissipation channels 41 and the number of first heat dissipation holes 42 can be selected according to the specific heat dissipation requirements. In this case, the second heat dissipation holes 43 can be arranged on the first housing 21, and the number of the second heat dissipation holes 43 is arranged according to the number of the heat dissipation channels 41, and each second heat dissipation hole 43 is connected to a heat dissipation channel 41. Alternatively, the heat sink 4 can also be arranged on the first housing 21, and the second heat dissipation holes 43 are arranged on the second housing 22 and are arranged corresponding to the heat dissipation channels 41.

[0074] In another embodiment provided in the present application, the heat sink 4 may also be disposed on the first shell 21, and the second heat dissipation holes 43 may also be disposed on the first shell 21, or the heat sink 4 may also be disposed on the second shell 22, and the second heat dissipation holes 43 may also be disposed on the second shell 22. In this process, it is only necessary to ensure that the second heat dissipation holes 43 correspond to and are connected to the heat dissipation channels 41.

[0075] In some other embodiments provided in the present application, the second heat dissipation holes 43 can be arranged on the first shell 21 and the second shell 22 at the same time. In this case, the heat dissipation element 4 can be arranged on the first shell 21 or the second shell 22. Similarly, it is only necessary to ensure that the second heat dissipation holes 43 correspond to and are connected with the heat dissipation channels 41.

[0076] Further, refer to Figure 5 As shown in , in an embodiment provided in the present application, two ends of the heat dissipation channel 41 may be connected and form two first heat dissipation holes 42 , and the second heat dissipation hole 43 may be connected to the middle of the heat dissipation channel 41 .

[0077] Based on the above embodiments provided by the present application, by forming the first heat dissipation hole 42 at both ends of the heat dissipation channel 41, and the second heat dissipation hole 43 is connected to the middle of the heat dissipation channel 41, at this time, there is a bending area in the heat dissipation path between the first heat dissipation hole 42 and the second heat dissipation hole 43, thereby ensuring the heat dissipation effect while preventing foreign matter from directly entering the transformer, taking into account the heat dissipation and sealing effects. In the present application, the structure of the heat dissipation channel 41 can be set to a variety of structures including S-shaped and straight-line types, and any suitable design can be selected according to processing requirements or use requirements, and the present application does not make specific restrictions on this.

[0078] In addition, any suitable connection method can be used between the heat sink 4 and the second housing 22 in the present application, and the present application does not impose any specific restrictions on this. Figure 5 As shown in the figure, the heat sink 4 can be connected to the second housing 22 and integrally arranged, and the second heat dissipation hole 43 is opened in the first housing 21. In some other embodiments provided in the present application, the heat sink 4 can also be connected to the first housing 21 and integrally arranged, and the second heat dissipation hole 43 can be opened in the second housing 22, and the present application does not make any specific restrictions on this.

[0079] Based on the above embodiments provided in the present application, by integrating the heat sink 4 with the first shell 21 or the second shell 22 , the integrated structure is easy to process on the one hand, and can enhance the structural strength on the other hand.

[0080] refer to Figure 4 As shown in , in one embodiment provided in the present application, at least one first support column 51 and at least one second support column 52 are provided on the inner side of the housing 2. The first support column 51 can abut against and support the fast saturation coil 12 in the detection component 1, and the second support column 52 can abut against and support the silicon steel sheet 13 in the detection component 1.

[0081] In specific use, the installation positions of the first support column 51 and the second support column 52 can be selected from any suitable design. For example, the first support column 51 is arranged on the first shell 21 and the second support column 52 is arranged on the second shell 22, or the first support column 51 is arranged on the second shell 21 and the second support column 52 is arranged on the first shell 21, or the first support column 51 and the second support column 52 are simultaneously arranged on one of the first shell 21 or the second shell 22. The specific selection can be made according to the assembly requirements, and the present application does not impose any specific restrictions on this.

[0082] Based on the above embodiments provided in the present application, the first support column 51 and the second support column 52 are provided to support the fast saturation coil 12 and the silicon steel sheet 13 respectively, so as to facilitate the installation and fixation of the fast saturation coil 12 and the silicon steel sheet 13 and other structures.

[0083] Specifically, in the related art, the silicon steel sheet 13 and the fast saturation coil 12 need to be coated with silicone and then wait for the silicone to dry during assembly to achieve a fixing effect. Not only is the process complicated, but it is also difficult to disassemble after the silicone solidifies. In the present application, the fast saturation coil 12 and the silicon steel sheet 13 are supported respectively by setting a first support column 51 and a second support column 52, so that the installation method is simpler and it is easy to disassemble during the subsequent maintenance and overhaul. Among them, the height and other parameters of the first support column 51 and the second support column 52 can be selected according to any suitable design according to factors such as the specific installation position of the fast saturation coil 12 and the silicon steel sheet 13, and the present application does not impose specific restrictions on this.

[0084] Specifically, the length of the first support column 51 can be shorter than the length of the second support column 52. Since the fast saturation coil 12 is sleeved outside the silicon steel sheet 13, the length of the first support column 51 used to support the fast saturation coil 12 can be set shorter. The specific height difference between the first support column 51 and the second support column 52 can be arbitrarily designed according to the actual size of the fast saturation coil 12 and the silicon steel sheet 13, and the present application does not impose any specific restrictions on this.

[0085] Further, refer to Figure 4 As shown in , the first support column 51 and the second support column 52 can be both arranged in the first housing 21, and at least two first support columns 51 are provided, and at least two first support columns 51 are adapted to the shape of the fast saturation coil 12. At least two second support columns 52 are provided, and the arrangement of at least two second support columns 52 is adapted to the shape of the silicon steel sheet 13.

[0086] Based on the above-mentioned embodiments provided in the present application, a plurality of first support columns 51 are provided to support the fast saturation coil 12, and a plurality of second support columns 52 are provided to support the silicon steel sheet 13, thereby being able to enhance the supporting effect for the fast saturation coil 12 and the silicon steel sheet 13. At the same time, the arrangement of the first support columns 51 is adapted to the shape of the fast saturation coil 12, and the arrangement of the second support columns 52 is adapted to the shape of the silicon steel sheet 13, thereby ensuring a better supporting effect.

[0087] Specifically, the number of the first support column 51 and the second support column 52 can be designed in any suitable manner, and the present application does not impose any specific restrictions on this. In an exemplary embodiment provided in the present application, the first support column 51 can be set to three, and the three first support columns 51 are arranged at equal intervals to support the fast saturation coil 12, and the second support column 52 can be set to nine, wherein two second support columns 52 are respectively arranged on the three straight sides of the silicon steel sheet 13 to support them, and the other three second support columns 52 are arranged at equal intervals to support the semicircular arc side of the silicon steel sheet 13.

[0088] In addition, in an embodiment provided in the present application, support pads may be provided at the ends of the first support column 51 and the second support column 52, and the support pads may be provided with flexible insulating materials, such as rubber, plastic, etc. By providing flexible support pads, damage to the fast saturation coil 12 and the silicon steel sheet 13 caused by the height error of the support column can be avoided while ensuring the support effect.

[0089] In the present application, any suitable connection method can be used between the first housing 21 and the second housing 22. Figure 4 As shown in , the first shell 21 and the second shell 22 can be buckled together, and a buckle 24 and a slot 25 can be provided between the first shell 21 and the second shell 22, and the buckle 24 can be snapped with the slot 25, wherein the buckle 24 is provided on the first shell 21 and the slot 25 is provided on the second shell 22, or the buckle 24 is provided on the second shell 22 and the slot 25 is provided on the first shell 21. The specific connection method can select any suitable design according to factors such as the material of the shell 2 and the assembly process requirements, and the present application does not make specific restrictions on this.

[0090] On the basis of the above technical solution, the second aspect of the present application further provides an electrical device, which includes the above mutual inductor.

[0091] The present application does not specifically limit the type of electrical equipment. For example, it may be a circuit breaker, a transformer, a variable frequency motor, or other equipment.

[0092] Specifically, in an embodiment provided by the present application, when the electrical equipment is set as a circuit breaker, the mutual inductor is set in the main circuit of the circuit breaker, and the mutual inductor transmits the detected current and other electric energy parameters to the controller, which outputs alarm, tripping and other instructions after calculation, thereby realizing the detection and protection of the circuit. In this process, the setting of the above structure in the mutual inductor avoids creepage breakdown during use, thereby avoiding affecting the protection function of the circuit breaker.

[0093] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings; however, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, a variety of simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the protection scope of the present application.

[0094] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0095] In addition, the various implementation modes of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. A mutual inductor, having a detection through hole, wherein a conductor is inserted into the detection through hole, characterized in that: The mutual inductor comprises: A detection component, surrounding the outer circumference of the conductor, and the detection component is used to detect the conductor; A housing, comprising a first housing and a second housing, wherein the first housing and the second housing are enclosed to form a receiving cavity, the receiving cavity surrounds the detection through hole, and the detection component is located in the receiving cavity; The first shell is provided with at least one first isolation wall, and the second shell is provided with at least one second isolation wall. Both the first isolation wall and the second isolation wall are annular structures, and the first isolation wall and the second isolation wall are at least partially nested with each other.

2. The mutual inductor according to claim 1, characterized in that: The first partition wall and the second partition wall are each provided with one, and the first partition wall is sleeved on the second partition wall; or, The first partition wall and the second partition wall are each provided with one, and the second partition wall is sleeved on the first partition wall; or, There is one first partition wall, and there are two second partition walls, and the first partition wall is inserted into the gap between the two second partition walls; or Two first isolation walls are provided, and one second isolation wall is provided, and the second isolation wall is inserted into the gap between the two first isolation walls.

3. The mutual inductor according to claim 1, characterized in that: The first partition wall and the second partition wall are each provided with one, the first partition wall is sleeved on the second partition wall, the first partition wall is located in the accommodating cavity, the end of the first partition wall abuts against the inner wall of the second shell, and the end of the second partition wall abuts against the inner wall of the first shell.

4. The mutual inductor according to claim 1, characterized in that: A heat sink is provided on the outer circumferential surface of the shell, at least one heat dissipation channel is provided in the heat sink, and at least one first heat dissipation hole is provided in each of the heat dissipation channels; At least one second heat dissipation hole communicating with the accommodating cavity is arranged on the first shell and / or the second shell, the heat dissipation element covers the second heat dissipation hole, and each of the second heat dissipation holes is communicated with one of the heat dissipation channels.

5. The mutual inductor according to claim 4, characterized in that: The heat sink is connected to the second housing and is integrally provided therewith, and the second heat dissipation hole is provided in the first housing; or The heat sink is connected to the first shell and is integrally arranged therewith, and the second heat dissipation hole is opened in the second shell.

6. The mutual inductor according to claim 4, characterized in that: Two ends of the heat dissipation channel are connected to form two first heat dissipation holes, and the second heat dissipation hole is connected to the middle of the heat dissipation channel.

7. The mutual inductor according to claim 1, characterized in that: At least one first support column and at least one second support column are disposed on the inner side of the first shell and / or the second shell; The first support column can abut against and support the fast saturation coil in the detection component, and the second support column can abut against and support the silicon steel sheet in the detection component.

8. The mutual inductor according to claim 7, characterized in that: The length of the first supporting column is shorter than the length of the second supporting column.

9. The mutual inductor according to claim 7, characterized in that: The first support column and the second support column are both arranged on the first housing, at least two first support columns are arranged, and at least two first support columns are adapted to the shape of the fast saturation coil; At least two second support columns are provided, and the arrangement of the at least two second support columns is adapted to the shape of the silicon steel sheet.

10. An electrical device, characterized in that: The electrical device comprises the transformer according to any one of claims 1-9.

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