Hybrid solid-state DC molded case circuit breaker

Abstract

The invention relates to the technical field of low-voltage circuit breakers, in particular to a hybrid solid-state direct-current molded case circuit breaker. The invention provides a hybrid solid-state direct-current molded case circuit breaker. The hybrid solid-state direct-current molded case circuit breaker comprises a cover body, a base, a circuit board and contact systems matched with each other, the cover body covers the base, and at least three mounting cavities are sequentially formed in the base side by side; a circuit board is arranged in one installation cavity between the installation cavities on the two sides, and contact systems are arranged in the other installation cavities. Energy generated during short-circuit breaking is absorbed through the circuit board, heat generated during short-circuit breaking is reduced, the performance of the circuit breaker is improved, the manufacturing cost of the circuit breaker is not higher than that of a pure solid circuit breaker, the circuit board is located in one installation cavity between the installation cavities on the two sides, and the situation that contact systems in the installation cavities on the two sides of the circuit board are too close to each other is avoided; the risk of short circuit is reduced, the space is utilized more reasonably, and the space utilization rate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage circuit breakers, and in particular to a hybrid solid-state DC molded case circuit breaker. Background Art

[0002] Existing low-voltage circuit breaker products, when used in DC systems, often need to enlarge the arc extinguishing system to achieve product performance. As product performance requirements are getting higher and higher, traditional products can no longer meet higher performance requirements.

[0003] Currently, more and more low-voltage electrical appliance manufacturers are researching solid-state circuit breakers, and some pure solid-state circuit breaker products have appeared. However, due to the high cost, they are not widely used. Mainly because of the big problem of heat dissipation, cooling devices are also needed, so only some small current products (below 80A) can be put into formal application.

[0004] It can be seen from this that in the field of low-voltage circuit breakers, there is an urgent need for a circuit breaker that can be used in DC systems and has a low cost. Summary of the invention

[0005] The object of the present invention is to provide a hybrid solid-state DC molded case circuit breaker to solve the technical problems that the existing low-voltage circuit breakers cannot meet the product performance requirements when applied in DC systems, and the pure solid-state circuit breakers have high costs.

[0006] The present invention provides a hybrid solid-state DC molded case circuit breaker, comprising: a cover, a base, a circuit board and a contact system that cooperates with each other;

[0007] The cover body is disposed on the base, and at least three installation cavities are sequentially arranged side by side on the base;

[0008] The circuit board is arranged in one of the installation cavities located between the installation cavities on both sides, and the contact systems are arranged in the other installation cavities. The circuit board is used to absorb the energy generated during short circuit disconnection.

[0009] As a further technical solution, it also includes an operating mechanism, which is located in the installation cavity where the circuit board is arranged and on the side of the circuit board facing the cover body, and the lever of the operating mechanism extends out of the cover body.

[0010] As a further technical solution, a tripper is also included, and the tripper is located in the installation cavity where the contact system is arranged, and is used to make the operating mechanism perform a tripping action.

[0011] As a further technical solution, it further comprises a rotating shaft, which passes through all the installation cavities and is transmission-connected to the operating mechanism;

[0012] The operating mechanism is used to drive the rotating shaft to rotate, and the rotating shaft drives the contact system to perform a closing action, an opening action or a tripping action through rotation.

[0013] As a further technical solution, the circuit board is a solid-state circuit board.

[0014] As a further technical solution, an odd number of the installation cavities are provided, and the circuit board is arranged in the installation cavity located in the middle.

[0015] As a further technical solution, an even number of the installation cavities are provided, and the circuit board is provided in any one of the two installation cavities located in the middle.

[0016] As a further technical solution, the contact system has a moving contact and a stationary contact, and the stationary contact is electrically connected to the circuit board;

[0017] During the closing process, the moving contact is electrically connected to the circuit board and the static contact in sequence;

[0018] During the opening and tripping process, the moving contact is electrically disconnected from the stationary contact and the circuit board in sequence.

[0019] As a further technical solution, it further includes a conductive member, a first wire and a second wire, wherein the conductive member is electrically connected to the circuit board through the first wire, and the static contact is electrically connected to the circuit board through the second wire;

[0020] The conductive member is located on the moving path of the moving contact, and during the closing process, the moving contact is connected with the conductive member and the stationary contact in sequence, and during the opening and tripping process, the moving contact is separated from the stationary contact and the conductive member in sequence.

[0021] As a further technical solution, the conductive member includes a support portion and an elastic clamping structure arranged on the support portion;

[0022] The elastic clamping structure forms a clamping space for clamping the moving contact, and the moving contact can move in and out of the clamping space by moving.

[0023] As a further technical solution, the elastic clamping structure comprises a first clamping arm and a second clamping arm, the first clamping arm and the second clamping arm are arranged opposite to each other, and the clamping space is formed therebetween;

[0024] The first clamping arm has clamping elasticity, and / or the second clamping arm has clamping elasticity.

[0025] As a further technical solution, the first clamping arm includes a first clamping portion and a first connecting portion;

[0026] The first connecting portion has two opposite ends, one end of which is connected to the supporting portion, and the other end of which is connected to the first clamping portion;

[0027] The first clamping portion and the first connecting portion are bent relative to each other, and the first clamping portion is located at a side of the first connecting portion facing the second clamping arm.

[0028] As a further technical solution, the second clamping arm includes a second clamping portion and a second connecting portion;

[0029] The second connecting portion has two opposite ends, one end of which is connected to the supporting portion, and the other end of which is connected to the second clamping portion;

[0030] The second clamping portion and the second connecting portion are bent relative to each other, and the second clamping portion is located at a side of the second connecting portion facing the first clamping arm.

[0031] As a further technical solution, the conductive member is located on the inner side of the moving contact.

[0032] As a further technical solution, the moving contact is arc-shaped, and the conductive member is located on the inner arc side of the moving contact.

[0033] As a further technical solution, the conductive member is in sheet form and is integrally formed.

[0034] As a further technical solution, the resistance of the conductive member is greater than the resistance of the moving contact.

[0035] As a further technical solution, all the contact systems on one side of the circuit board form a pole with the same polarity, and all the contact systems on the other side of the circuit board form a pole with the same polarity, and one pole has at least one release.

[0036] As a further technical solution, the circuit board includes two mutually isolated first circuit boards and second circuit boards, and when an arc is generated during the process of connecting or disconnecting the hybrid solid-state DC molded case circuit breaker, the moving contact is electrically connected to the circuit board, and the arc voltage supplies power to the circuit board to make the circuit board conductive with the moving contact and the static contact. At this time, the current path is the power supply end of one pole-the first circuit board-the load end of one pole-the load end of the other pole-the second circuit board-the power supply end of the other pole.

[0037] As a further technical solution, the first circuit board is located on the upper side and the second circuit board is located on the lower side, and the current path is the static contact of one pole-the first circuit board-the moving contact of one pole-the moving contact of the other pole-the second circuit board-the static contact of the other pole.

[0038] Compared with the prior art, the hybrid solid-state DC molded case circuit breaker provided by the present invention has the following technical advantages:

[0039] The hybrid solid-state DC molded case circuit breaker provided by the present invention comprises: a cover body, a base, a circuit board and a contact system that cooperates with each other; the cover body is arranged on the base, and at least three installation cavities are arranged side by side in sequence on the base; a circuit board is arranged in an installation cavity located between the installation cavities on both sides, and the contact systems are arranged in the other installation cavities, and the circuit board is used to absorb the energy generated during short circuit breaking.

[0040] A hybrid solid-state DC molded case circuit breaker is formed by arranging a circuit board in a traditional DC molded case circuit breaker. The circuit board absorbs the energy generated during short-circuit breaking and reduces the heat generated during short-circuit breaking. Therefore, there is no need to arrange a cooling device like in a traditional pure solid-state circuit breaker, thereby improving the performance of the circuit breaker. Therefore, the performance problem is solved and the manufacturing cost is not as high as that of a pure solid-state circuit breaker. At the same time, the circuit board is located in an installation cavity between the installation cavities on both sides, so that the contact systems in the installation cavities on both sides of the circuit board are prevented from being too close to each other, thereby reducing the risk of short circuit. In addition, the circuit board is combined with the traditional DC molded case circuit breaker without significantly increasing the volume of the circuit breaker, thereby making more reasonable use of space and improving space utilization.

[0041] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0044] Figure 2 An exploded view of the overall structure provided by an embodiment of the present invention;

[0045] Figure 3 A schematic diagram of the connection between the moving contact, the stationary contact and the conductive member provided in an embodiment of the present invention;

[0046] Figure 4 A schematic diagram of a moving contact provided by an embodiment of the present invention when the moving contact is not electrically connected to the conductive member and the stationary contact;

[0047] Figure 5 A schematic diagram of a moving contact provided by an embodiment of the present invention being electrically connected to a conductive member and not electrically connected to a stationary contact;

[0048] Figure 6 A schematic diagram of a moving contact provided by an embodiment of the present invention when the moving contact is electrically connected to the conductive member and the stationary contact;

[0049] Figure 7 A schematic diagram of the structure of a conductive member provided in an embodiment of the present invention;

[0050] Figure 8 A schematic diagram of the connection between a circuit board and a contact system provided in an embodiment of the present invention;

[0051] Fig. 9 A schematic diagram of the position of a circuit board when three mounting cavities are provided in an embodiment of the present invention;

[0052] Fig.10 A schematic diagram of a position of a circuit board when four mounting cavities are provided in an embodiment of the present invention;

[0053] Fig.11 Another schematic diagram of the position of the circuit board when there are four mounting cavities provided in the embodiment of the present invention;

[0054] Fig.12 A schematic diagram of the position of a circuit board when five mounting cavities are provided in an embodiment of the present invention.

[0055] Icons: 1-cover; 2-base; 3-installation cavity; 4-circuit board; 41-first circuit board; 42-second circuit board; 5-tripper; 6-operating mechanism; 7-lever; 8-rotating shaft; 9-moving contact; 10-static contact; 11-conductive member; 12-first conductor; 13-second conductor; 14-supporting part; 15-clamping space; 16-first clamping arm; 17-second clamping arm; 18-first clamping part; 19-first connecting part; 20-second clamping part; 21-second connecting part; 22-contact arc extinguishing system; 23-arc extinguishing chamber. DETAILED DESCRIPTION

[0056] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0060] The present invention is further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0061] Specific structure such as Figures 1 to 12 shown.

[0062] The present embodiment provides a hybrid solid-state DC molded case circuit breaker, comprising: a cover body 1, a base 2, a circuit board 4 and a contact system that cooperates with each other; the cover body 1 is arranged on the base 2, and at least three mounting cavities 3 are arranged side by side in sequence on the base 2; a circuit board 4 is arranged in a mounting cavity 3 located between the mounting cavities 3 on both sides, and the contact systems are arranged in the other mounting cavities 3, and the circuit board 4 is used to absorb the energy generated during short circuit breaking.

[0063] In this embodiment, a circuit board 4 is arranged in a traditional DC molded case circuit breaker to form a hybrid solid-state DC molded case circuit breaker. The circuit board 4 absorbs the energy generated during short-circuit breaking and reduces the heat generated during short-circuit breaking. Therefore, there is no need to set a cooling device like in a traditional pure solid-state circuit breaker, which improves the performance of the circuit breaker. Therefore, it not only solves the performance problem, but also has a manufacturing cost that is not as high as that of a pure solid-state circuit breaker. At the same time, the circuit board 4 is located in an installation cavity 3 between the installation cavities 3 on both sides, so that the contact systems in the installation cavities 3 on both sides of the circuit board 4 are prevented from being too close to each other, thereby reducing the risk of short circuit. In addition, the circuit board 4 is combined with the traditional DC molded case circuit breaker without significantly increasing the volume of the circuit breaker, thereby making more reasonable use of space and improving space utilization.

[0064] The optional technical solution of this embodiment further includes an operating mechanism 6, which is located in the installation cavity 3 where the circuit board 4 is provided, and is located on the side of the circuit board 4 facing the cover body 1, and the lever 7 of the operating mechanism 6 extends out of the cover body 1.

[0065] In this embodiment, the operating mechanism 6 is located on the side of the circuit board 4 facing the cover body 1 and is directly opposite to the circuit board 4, and the operating mechanism 6 and the circuit board 4 are located in the same installation cavity 3, which fully utilizes the space and reduces the overall volume of the circuit breaker. At the same time, the lever 7 of the operating mechanism 6 extends out of the cover body 1, which is convenient for the user to push the lever 7 to close and open the circuit breaker.

[0066] In an optional technical solution of this embodiment, the tripper 5 is located in the installation cavity 3 where the contact system is provided, and is used to enable the operating mechanism 6 to perform a tripping action.

[0067] In this embodiment, all contact systems can form one pole, that is, a single-pole circuit breaker, or all contact systems on one side of the circuit board can form one pole (positive pole) of the same polarity, and all contact systems on the other side of the circuit board can form one pole (negative pole) of the same polarity, that is, a two-pole circuit breaker. Among them, there is at least one release 5 in each pole, or each contact system can be equipped with a release 5. Preferably, the contact system and the arc extinguishing system are integrated to form a contact arc extinguishing system 22, and a release 5 is provided at the end of each contact arc extinguishing system 22, and the release 5 is also located in the installation cavity 3 where the contact arc extinguishing cavity system is located. When the product fails such as overload, the release 5 can open the moving contact 9 and the static contact 10 in the contact arc extinguishing system 22 to protect the circuit.

[0068] The optional technical solution of this embodiment also includes a rotating shaft 8, which passes through the entire installation cavity 3 and is transmission-connected to the operating mechanism 6; the operating mechanism 6 is used to drive the rotating shaft 8 to rotate, and the rotating shaft 8 drives the contact 9 system to perform closing action, opening action or tripping action through rotation.

[0069] In this embodiment, a rotating shaft 8 is arranged in each installation cavity 3, and all the rotating shafts 8 can rotate synchronously and coaxially. The rotating shaft 8 is transmission-connected with the operating mechanism 6, and the operating mechanism 6 drives the rotating shaft 8 to rotate, so that the contact arc extinguishing system 22 performs closing action, opening action and tripping action. When a product fails such as overload, the release 5 drives the operating mechanism 6 to perform a tripping action, and the tripping action causes the moving contact 9 and the static contact 10 in the contact arc extinguishing system 22 to open to protect the circuit.

[0070] In the optional technical solution of this embodiment, the circuit board 4 is a solid-state circuit board 4, that is, a PCB board, which is sturdy and durable, small in size, and light in weight. It can effectively reduce space occupancy and is easy to assemble, install, replace and repair. At the same time, the circuit connection is firm and reliable, and has strong durability. It can withstand complex environments such as high temperature and high humidity, and the PCB board can be easily mass-produced at low cost.

[0071] In an optional technical solution of this embodiment, an odd number of mounting cavities 3 are provided, and a circuit board 4 is provided in the middle mounting cavity 3 .

[0072] Specifically, when there are three or five mounting cavities 3, the circuit board 4 is arranged in the middle mounting cavity 3, so that the other mounting cavities 3 on both sides of the circuit board 4 are symmetrical with respect to the mounting cavity 3 where the circuit board 4 is located, that is, the number of mounting cavities 3 on both sides of the mounting cavity 3 where the circuit board 4 is located is equal, thereby reducing the possibility of short circuit, and the operating mechanism 6 is located in the middle position, and the structure is beautiful.

[0073] It should be noted that the present embodiment is not limited thereto, and the number of the mounting cavities 3 may be any odd number greater than or equal to three.

[0074] In an optional technical solution of this embodiment, an even number of mounting cavities 3 are provided, and a circuit board 4 is provided in any one of the two mounting cavities 3 located in the middle.

[0075] Specifically, when four installation cavities 3 are provided, the circuit board 4 is provided in any one of the two installation cavities 3 in the middle, so that there are two installation cavities 3 on one side of the installation cavity 3 where the circuit board 4 is located, and one installation cavity 3 on the other side. The structure is beautiful and the arrangement is reasonable, which improves space utilization.

[0076] It should be noted that the present embodiment is not limited thereto, and the number of the mounting cavities 3 may be any even number greater than or equal to four.

[0077] In the optional technical solution of this embodiment, the contact system has a moving contact 9 and a stationary contact 10, and the stationary contact 10 is electrically connected to the circuit board 4; during the closing process, the moving contact 9 is electrically connected to the circuit board 4 and the stationary contact 10 in turn; during the opening and tripping process, the moving contact 9 is electrically disconnected from the stationary contact 10 and the circuit board 4 in turn.

[0078] In this embodiment, when the moving contact 9 and the stationary contact 10 are short-circuited, an arc will be generated when the moving contact 9 and the stationary contact 10 are opened, part of the arc is extinguished by the arc extinguishing system, and the other part of the arc enters the circuit board 4, and the circuit board 4 also plays a part in extinguishing the arc, thereby improving the arc extinguishing effect.

[0079] In order to ensure that the circuit board 4 achieves an arc extinguishing effect, in the process of pushing the lever 7 to close the operating mechanism 6, the operating mechanism 6 drives the rotating shaft 8 to rotate, and then drives the moving contact 9 set on the rotating shaft 8 to move. In the process of the moving contact 9 moving, it first realizes electrical connection with the circuit board 4, and then realizes electrical connection with the static contact 10. Since the static contact 10 and the circuit board 4 always maintain electrical connection, when the moving contact 9 realizes electrical connection with the circuit board 4, the moving contact 9 and the static contact 10 are both connected to the circuit board 4; in the process of pushing the lever 7 to open the operating mechanism 6, the operating mechanism 6 It drives the rotating shaft 8 to rotate, and then drives the moving contact 9 set on the rotating shaft 8 to move. During the movement of the moving contact 9, it is first electrically disconnected from the static contact 10, and then electrically disconnected from the circuit board 4; when an overload or short circuit fault occurs, the releaser 5 drives the operating mechanism 6 to perform a tripping action. The tripping action causes the operating mechanism 6 to change from a closed position to an open position, thereby driving the rotating shaft 8 to rotate, and then drives the moving contact 9 set on the rotating shaft 8 to move. During the movement of the moving contact 9, it is first electrically disconnected from the static contact 10, and then electrically disconnected from the circuit board 4.

[0080] The optional technical solution of this embodiment also includes a conductive member 11, a first wire 12 and a second wire 13. The conductive member 11 is electrically connected to the circuit board 4 through the first wire 12, and the static contact 10 is electrically connected to the circuit board 4 through the second wire 13; the conductive member 11 is located on the movement path of the moving contact 9, and during the closing process, the moving contact 9 is connected to the conductive member 11 and the static contact 10 in turn, and during the opening and tripping process, the moving contact 9 is separated from the static contact 10 and the conductive member 11 in turn.

[0081] In this embodiment, a conductive member 11 is provided on the moving path of the moving contact 9, and the conductive member 11 is located between the static contact 10 and the moving contact 9, so that the moving contact 9 can first connect with the conductive member 11 and then connect with the static contact 10 during the closing movement, and the moving contact 9 can first separate from the static contact 10 and then separate from the conductive member 11 during the opening and tripping movements. At the same time, the conductive member 11 is electrically connected to the circuit board 4 through the first wire 12, and the static contact 10 is electrically connected to the circuit board 4 through the second wire 13. The overall structure is simple, occupies little space, and improves space utilization.

[0082] When an even number of mounting cavities 3 are provided, the circuit board 4 is located in any one of the two middle mounting cavities 3. All mounting cavities 3 on the left side of the circuit board 4 are one pole, and all mounting cavities 3 on the right side of the circuit board 4 are one pole, so that the first wire 12 and the second wire 13 can be connected to the adjacent mounting cavity 3, which is convenient for wiring.

[0083] But it is not limited to this. The circuit breaker may also have at least one pole, and the circuit board 4 may be located on one side of the pole. Specifically, in the case of a single-pole circuit breaker, the circuit board is located on one side of the pole. In the case of a two-stage circuit breaker, the circuit board may be located not only between two adjacent stages, but also on one side of any pole.

[0084] In this embodiment, all the mounting cavities 3 on the left side of the circuit board 4 are one pole, with two terminals, one for power supply and one for load. All the mounting cavities 3 on the right side of the circuit board 4 are one pole, with two terminals, one for power supply and one for load.

[0085] It should be noted that if it is a two-pole circuit breaker, in this embodiment, the two adjacent left and right mounting cavities 3 where the circuit board 4 is located can be of the same polarity. In this setting, when the first wire 12 and the second wire 13 are connected, they need to cross the mounting cavity 3 to the mounting cavity 3 of the other polarity, which makes the wiring complicated.

[0086] When the circuit breaker is turned on, the circuit board 4 is not connected to the moving contact 9 and the stationary contact 10. The circuit board 4 needs to be powered by the arc voltage generated when the circuit breaker is closed or opened to make the circuit board 4 connected to the moving contact 9 and the stationary contact 10.

[0087] When the circuit breaker is turned on, there is no arc, so the circuit board 4 is not conducting with the moving contact 9 and the stationary contact 10. The current flows through all poles of the circuit breaker, that is, it flows in from the power supply end of the left pole of the circuit board 4, flows out from the load end of the left pole of the circuit board 4, then flows in from the load end of the right pole of the circuit board 4, and flows out from the power supply end of the right pole of the circuit board 4.

[0088] The circuit board 4 is composed of a first circuit board 41 and a second circuit board 42. The first circuit board 41 and the second circuit board 42 are isolated from each other. When an arc is generated during the process of the circuit breaker being turned on or off, the arc voltage supplies power to the circuit board 4 so that the circuit board 4 is turned on with the moving contact 9 and the stationary contact 10. The moving contact 9 is connected to the conductive member 11, and the current path is, the left stationary contact 10-first circuit board 41-left moving contact 9-right moving contact 9-second circuit board 42-right stationary contact 10.

[0089] As attached Figure 8As shown, the contact system can be a rotating double-breakpoint contact system, with a pair of moving contacts 9 and a stationary contact 10 on each side of the rotating shaft 8, and the two moving contacts 9 are symmetrically arranged with respect to the rotation center of the rotating shaft 8 and are integrated. Then the circuit board 4 can be connected to the stationary contact 10 and the moving contact 9 on the left side of the rotating shaft 8, or the circuit board 4 can also be connected to the stationary contact 10 on the left side of the rotating shaft 8 and the moving contact 9 on the right side of the rotating shaft 8.

[0090] Preferably, the resistance of the conductive member 11 is greater than the resistance of the movable contact 9. Since the movable contact 9 conducts electricity when the circuit is connected, the resistance of the movable contact 9 should be small. When the circuit is disconnected, the circuit board 4 absorbs the arc energy. The large resistance of the conductive member 11 can reduce the arc energy, thereby reducing the difficulty of the circuit board 4 absorbing the arc energy.

[0091] If the current is small enough, only one of the first circuit board 41 and the second circuit board 42 may be used, and the left or right pole may be connected.

[0092] In an optional technical solution of this embodiment, the conductive member 11 includes a support portion 14 and an elastic clamping structure arranged on the support portion 14; the elastic clamping structure forms a clamping space 15 for clamping the moving contact 9, and the moving contact 9 can move in and out of the clamping space 15 by moving.

[0093] In this embodiment, the elastic clamping structure is installed in the installation cavity 3 where the circuit board 4 is located through the support part 14. The moving contact 9 can move in and out of the clamping space 15. When the moving contact 9 enters the clamping space 15, the moving contact 9 is clamped by the elastic clamping force of the elastic clamping structure to achieve electrical connection between the moving contact 9 and the circuit board 4. The structure is simple and the stability of the conductive effect is improved.

[0094] In the optional technical solution of this embodiment, the elastic clamping structure includes a first clamping arm 16 and a second clamping arm 17. The first clamping arm 16 and the second clamping arm 17 are arranged opposite to each other and a clamping space 15 is formed therebetween; the first clamping arm 16 has clamping elasticity, and / or the second clamping arm 17 has clamping elasticity.

[0095] In this embodiment, the clamping elasticity means that after the moving contact 9 enters the clamping space 15, the elastic clamping structure can provide elastic force to maintain the clamping state, and after the moving contact 9 exits the clamping space 15, the elastic clamping structure can reset.

[0096] In this embodiment, the first clamp arm 16 may have clamping elasticity, and the second clamp arm 17 may not have clamping elasticity. When the moving contact 9 enters the clamping space 15, the first clamp arm 16 clamps the moving contact 9 between the first clamp arm 16 and the second clamp arm 17 under the action of the clamping elasticity, and the connection is reliable; the second clamp arm 17 may have clamping elasticity, and the first clamp arm 16 may not have clamping elasticity. When the moving contact 9 enters the clamping space 15, the second clamp arm 17 clamps the moving contact 9 between the first clamp arm 16 and the second clamp arm 17 under the action of the clamping elasticity, and the connection is also reliable; preferably, both the first clamp arm 16 and the second clamp arm 17 have clamping elasticity. When the moving contact 9 enters the clamping space 15, both the first clamp arm 16 and the second clamp arm 17 clamp the moving contact 9 between the first clamp arm 16 and the second clamp arm 17 under the action of the clamping elasticity. Both sides of the moving contact 9 are clamped under the action of elastic force, and the electrical connection is more reliable.

[0097] In an optional technical solution of this embodiment, the first clamping arm 16 includes a first clamping portion 18 and a first connecting portion 19; the first connecting portion 19 has two opposite ends, and one end is connected to the supporting portion 14, and the other end is connected to the first clamping portion 18; the first clamping portion 18 and the first connecting portion 19 are relatively bent, and the first clamping portion 18 is located on the side of the first connecting portion 19 facing the second clamping arm 17.

[0098] In this embodiment, the first clamp arm 16 is bent as a whole, and the bending angle is greater than 90°. The two relatively bent sections form the first clamping portion 18 and the first connecting portion 19 respectively. The first clamping portion 18 and the first connecting portion 19 are relatively bent so that the first clamp arm 16 has clamping elasticity, that is, the first clamping portion 18 can move toward the first connecting portion 19 under the action of external force, and the first clamping portion 18 can be reset after the external force is removed. When the moving contact 9 is inserted into the clamping space 15, it first contacts the first clamping portion 18. At this time, the first clamping portion 18 has a guiding effect. Continued insertion causes the first clamping portion 18 to move toward the first connecting portion 19, so that the first clamping portion 18 generates a reset elastic force and clamps the moving contact 9 between the first clamping portion 18 and the second clamp arm 17. The first clamp arm 16 has a simple structure, is easy to manufacture, and has a good clamping effect.

[0099] In this embodiment, the first clamping portion 18 and the first connecting portion 19 may be arranged opposite to each other, and the first clamping portion 18 is located between the first connecting portion 19 and the second clamping arm 17. An elastic member is arranged between the first clamping portion 18 and the first connecting portion 19, and the first clamping arm 16 has clamping elasticity through the elastic member, that is, the first clamping portion 18 can elastically compress the elastic member under the action of external force, and after the external force is removed, the elastic member elastically resets and then resets the first clamping portion 18, so that the elastic clamping effect of the first clamping arm 16 can also be achieved.

[0100] In an optional technical solution of the present embodiment, the second clamping arm 17 includes a second clamping portion 20 and a second connecting portion 21; the second connecting portion 21 has two opposite ends, and one end is connected to the supporting portion 14, and the other end is connected to the second clamping portion 20; the second clamping portion 20 and the second connecting portion 21 are relatively bent, and the second clamping portion 20 is located on the side of the second connecting portion 21 facing the first clamping arm 16.

[0101] In this embodiment, the implementation of the second clamping arm 17 is the same as that of the first clamping arm 16, and therefore has the same technical effect, which will not be described in detail here.

[0102] In the optional technical solution of this embodiment, the conductive member 11 is located on the inner side of the moving contact 9, wherein the inner side of the moving contact 9 is the side of the moving contact 9 facing the stationary contact 10. Further, the moving contact 9 is arc-shaped, and the conductive member 11 is located on the inner arc side of the moving contact 9. The arc-shaped moving contact 9 can avoid the conductive member 11 during opening and tripping, and the end of the moving contact 9 can be connected to the stationary contact 10 and the conductive member 11 at the same time when closing, thereby reducing the overall occupied space and improving the space utilization rate.

[0103] In the optional technical solution of this embodiment, the conductive member 11 is in the form of a sheet and is integrally formed. It is easy to manufacture, has high structural strength, and has a large conductive contact surface. The sheet structure enables the first clamping arm 16 and the second clamping arm 17 to have good clamping elasticity. At the same time, the conductive member 11 is made of metal material and has a good conductive effect. Preferably, the conductive member 11 is made of a copper sheet.

[0104] It should be noted that the hybrid solid-state DC molded case circuit breaker of this embodiment may be equipped with an arc extinguishing system, i.e., an arc extinguishing chamber 23, or may not be equipped with an arc extinguishing chamber 23, depending on the specific situation. Since the circuit board 4 absorbs the energy generated during short circuit breaking, the arc between the moving contact 9 and the static contact 10 is very small during breaking, so the arc extinguishing chamber 23 may not be equipped. If the circuit breaker is to be equipped with an arc extinguishing chamber 23 in order to improve reliability so that the circuit breaker can be successfully broken several times even when the circuit board 4 fails, the circuit breaker needs to be equipped with an arc extinguishing chamber 23.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hybrid solid-state DC molded case circuit breaker, It is characterized in that include: A cover body (1), a base (2), a circuit board (4) and a contact system that cooperate with each other; The cover body (1) is covered on the base (2), and at least three installation cavities (3) are arranged in sequence side by side on the base (2); The circuit board (4) is arranged in one of the installation cavities (3) located between the installation cavities (3) on both sides, and the contact system is arranged in the other installation cavities (3). The circuit board (4) is used to absorb energy generated during short circuit disconnection.

2. The hybrid solid-state DC molded case circuit breaker according to claim 1, It is characterized in that It also comprises an operating mechanism (6), wherein the operating mechanism (6) is located in the mounting cavity (3) where the circuit board (4) is arranged, and is located on a side of the circuit board (4) facing the cover body (1), and a lever (7) of the operating mechanism (6) extends out of the cover body (1).

3. The hybrid solid-state DC molded case circuit breaker according to claim 2, It is characterized in that It also comprises a tripper (5), which is located in the installation cavity (3) in which the contact system is arranged, and is used to enable the operating mechanism (6) to perform a tripping action.

4. The hybrid solid-state DC molded case circuit breaker according to claim 3, It is characterized in that It also includes a rotating shaft (8), which passes through all of the installation cavities (3) and is transmission-connected to the operating mechanism (6); The operating mechanism (6) is used to drive the rotating shaft (8) to rotate, and the rotating shaft (8) drives the contact system to perform a closing action, an opening action or a tripping action through rotation.

5. The hybrid solid-state DC molded case circuit breaker according to claim 1, It is characterized in that The circuit board (4) is a solid-state circuit board (4).

6. The hybrid solid-state DC molded case circuit breaker according to claim 1, It is characterized in that An odd number of the installation cavities (3) are provided, and the circuit board (4) is arranged in the middle installation cavity (3).

7. The hybrid solid-state DC molded case circuit breaker according to claim 1, It is characterized in that An even number of the installation cavities (3) are provided, and the circuit board (4) is provided in any one of the two installation cavities (3) located in the middle.

8. The hybrid solid-state DC molded case circuit breaker according to any one of claims 1 to 7, It is characterized in that The contact system comprises a moving contact (9) and a stationary contact (10), and the stationary contact (10) is electrically connected to the circuit board (4); During the closing process, the moving contact (9) is electrically connected to the circuit board (4) and the stationary contact (10) in sequence; During the opening and tripping process, the moving contact (9) is electrically disconnected from the stationary contact (10) and the circuit board (4) in sequence.

9. The hybrid solid-state DC molded case circuit breaker according to claim 8, It is characterized in that It also comprises a conductive member (11), a first conductive wire (12) and a second conductive wire (13), wherein the conductive member (11) is electrically connected to the circuit board (4) via the first conductive wire (12), and the static contact (10) is electrically connected to the circuit board (4) via the second conductive wire (13); The conductive member (11) is located on the moving path of the moving contact (9), and during the closing process, the moving contact (9) is connected to the conductive member (11) and the stationary contact (10) in sequence, and during the opening and tripping process, the moving contact (9) is separated from the stationary contact (10) and the conductive member (11) in sequence.

10. The hybrid solid-state DC molded case circuit breaker according to claim 9, It is characterized in that The conductive member (11) comprises a supporting portion (14) and an elastic clamping structure arranged on the supporting portion (14); The elastic clamping structure forms a clamping space (15) for clamping the moving contact (9), and the moving contact (9) can move in and out of the clamping space (15) by moving.

11. The hybrid solid-state DC molded case circuit breaker according to claim 10, It is characterized in that The elastic clamping structure comprises a first clamping arm (16) and a second clamping arm (17), wherein the first clamping arm (16) and the second clamping arm (17) are arranged opposite to each other and the clamping space (15) is formed therebetween; The first clamping arm (16) has clamping elasticity, and / or the second clamping arm (17) has clamping elasticity.

12. The hybrid solid-state DC molded case circuit breaker according to claim 11, It is characterized in that The first clamping arm (16) comprises a first clamping portion (18) and a first connecting portion (19); The first connecting portion (19) has two opposite ends, one end of which is connected to the supporting portion (14) and the other end of which is connected to the first clamping portion (18); The first clamping portion (18) and the first connecting portion (19) are bent relative to each other, and the first clamping portion (18) is located on a side of the first connecting portion (19) facing the second clamping arm (17).

13. The hybrid solid-state DC molded case circuit breaker according to claim 11, It is characterized in that The second clamping arm (17) comprises a second clamping portion (20) and a second connecting portion (21); The second connecting portion (21) has two opposite ends, one end of which is connected to the supporting portion (14) and the other end of which is connected to the second clamping portion (20); The second clamping portion (20) and the second connecting portion (21) are bent relative to each other, and the second clamping portion (20) is located on a side of the second connecting portion (21) facing the first clamping arm (16).

14. The hybrid solid-state DC molded case circuit breaker according to claim 9, It is characterized in that The conductive member (11) is located on the inner side of the moving contact (9).

15. The hybrid solid-state DC molded case circuit breaker according to claim 14, It is characterized in that The moving contact (9) is arc-shaped, and the conductive member (11) is located on the inner arc side of the moving contact (9).

16. The hybrid solid-state DC molded case circuit breaker according to claim 9, It is characterized in that The conductive element (11) is in sheet shape and is integrally formed.

17. The hybrid solid-state DC molded case circuit breaker according to claim 9, It is characterized in that The resistance of the conductive member (11) is greater than the resistance of the moving contact (9).

18. The hybrid solid-state DC molded case circuit breaker according to claim 3, It is characterized in that All the contact systems on one side of the circuit board (4) form a pole with the same polarity, and all the contact systems on the other side of the circuit board (4) form a pole with the same polarity, and at least one release (5) is provided in one pole.

19. The hybrid solid-state DC molded case circuit breaker according to claim 8, It is characterized in that The circuit board (4) comprises a first circuit board (41) and a second circuit board (42) which are isolated from each other, and when an arc is generated during the process of connecting or disconnecting the hybrid solid-state DC molded case circuit breaker, the moving contact (9) is electrically connected to the circuit board (4), and the arc voltage supplies power to the circuit board (4) so ​​that the circuit board (4) is connected to the moving contact (9) and the static contact (10), and at this time, the current path is a power supply end of one pole-the first circuit board (41)-a load end of one pole-the load end of the other pole-the second circuit board (42)-the power supply end of the other pole.

20. The circuit breaker according to claim 19, It is characterized in that The first circuit board (41) is located on the upper side and the second circuit board (42) is located on the lower side, and the current path is the static contact (10) of one pole - the first circuit board (41) - the moving contact (9) of one pole - the moving contact (9) of the other pole - the second circuit board (42) - the static contact (10) of the other pole.

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