CN220672473U - Relay device - Google Patents

Abstract

The application discloses a relay relates to the technical field of piezoelectric devices, and the relay comprises a shell and a base, wherein the shell is enclosed to form a containing cavity; a base is connected with the shell, the base is partially positioned in the accommodating cavity, and a contact switching assembly is arranged on the base; the contact switching assembly comprises a fixed contact and a moving contact capable of repeatedly contacting the fixed contact, and the moving contact and the fixed contact can generate an electric arc when being separated; the base is provided with at least one arc-extinguishing cavity near the position of the contact switching assembly, an arc-extinguishing structure is arranged in the arc-extinguishing cavity, and the arc-extinguishing structure is arranged on one side of the relative abutting position of the moving contact and the static contact. The relay power control circuit can extinguish the arc through the arc extinguishing structure when the relay power is large, improve the relay performance and ensure the safety of the relay.

Description

Relay device

Technical Field

The application relates to the technical field of piezoelectric devices, in particular to a relay.

Background

In the related technical field, the relay is an automatic switching element with an isolation function and is widely applied to aspects of photovoltaic, energy storage, vehicle-mounted and the like.

The contact system is an important component of the relay, the performance of the contact system affects the service life and safety of the product, a high-power relay is needed in the existing product, and the load voltage and switching current requirements are relatively high.

However, the requirement of the high-power relay is higher, the existing relay cannot meet the requirement, and because the power of the relay is increased, an arc is generated by a contact system in the relay, the electrical performance of the relay is reduced, and the relay has potential safety hazards.

Disclosure of Invention

The embodiment of the application provides a relay, and it can be when relay power is great, extinguishes the electric arc through the arc extinguishing structure, improves relay performance, guarantees relay's security.

The embodiment of the application provides a relay, which comprises a shell and a base, wherein the shell is enclosed to form a containing cavity; a base is connected with the shell, the base is partially positioned in the accommodating cavity, and a contact switching assembly is arranged on the base;

the contact switching assembly comprises a fixed contact and a moving contact capable of repeatedly contacting the fixed contact, and the moving contact and the fixed contact can generate an electric arc when being separated;

the base is provided with at least one arc-extinguishing cavity near the position of the contact switching assembly, an arc-extinguishing structure is arranged in the arc-extinguishing cavity, and the arc-extinguishing structure is arranged on one side of the relative abutting position of the moving contact and the static contact.

Based on the above examples of the application, the housing may be used to carry the base and may protect the base and the components on the base. The contact switching assembly can change the on-off of a circuit through the mode of switching the connecting contact, when the relay power is higher, the contact switching assembly can generate electric arcs in the switching process, the electric arcs can cause interference to the functions of the relay, the arc extinguishing cavity is arranged on the base and close to the position of the contact switching assembly, the electric arcs can be more easily introduced into the arc extinguishing cavity, and then the electric arcs are extinguished through the arc extinguishing structure in the arc extinguishing cavity. The high-power relay can be applied to circuits with higher load voltage and switching current. The embodiment of the application can extinguish the arc through the arc extinguishing structure when the relay power is larger, improve the relay performance and ensure the safety of the relay.

In some examples, the moving contact is movably connected with the base, a magneto-philic structure is arranged on the moving contact, the fixed contact is arranged on the base, the contact of the fixed contact is opposite to the contact of the moving contact, and the contact switching assembly further comprises an elastic piece and an electromagnet;

one end of the elastic piece is connected with the moving contact, the other end of the elastic piece is connected with the base, and the elastic piece can maintain the moving contact at an initial position; the electromagnet is arranged on the base and is arranged at intervals with the magneto-philic structure in the moving contact;

after the electromagnet is electrified, the electromagnet can attract the magnet-attracting structure to move towards the direction close to the electromagnet, and the moving contact is abutted to the fixed contact under the drive of the magnet-attracting structure;

the arc extinguishing structure is arranged on one side of the abutting position of the moving contact and the fixed contact.

In the structure, the moving contact can move relative to the fixed contact, the elastic piece can maintain the moving contact at the initial position, and the electromagnet can generate external force for driving the moving contact to move. The electromagnet can attract the magneto-philic structure on the movable contact through electromagnetic force generated after the electromagnet is electrified, so that the elastic pretightening force of the elastic piece is overcome, and the movable contact is pulled to be separated from the initial position until the movable contact is abutted to the fixed contact.

In some examples, the arc extinguishing chamber is disposed at one side of the contact position of the moving contact and the fixed contact, and the casing and the base enclose the arc extinguishing chamber. After the arc extinguishing cavity is formed by enclosing the shell and the base, the arrangement of the outer wall of the arc extinguishing cavity can be saved, the use of materials is reduced, and the cost of the relay is reduced.

In some examples, the arc extinguishing structure comprises at least one of a grid arc extinguishing structure, a slot arc extinguishing structure, a magnetic blow-out arc extinguishing structure, and an electrodynamic arc extinguishing structure. When the moving contact is separated from the fixed contact, a certain arc can be generated, and the arc extinguishing structure arranged on one side of the fixed contact can absorb and convert the arc to be extinguished, so that an arc extinguishing effect is finally realized.

In some examples, the arc extinguishing structures are grid arc extinguishing structures, and at least two arc extinguishing grid plates are arranged in each arc extinguishing cavity. After two arc-extinguishing bars are arranged in each arc-extinguishing cavity, the arc-extinguishing structure can be guaranteed to have a certain arc-extinguishing effect, and the effectiveness of the arc-extinguishing structure is guaranteed.

In some examples, the fixed contact is provided with two fixed contacts arranged at intervals, the movable contact is provided with two movable contacts arranged at intervals, and the fixed contacts are in one-to-one correspondence with the movable contacts;

the base is provided with six arc-extinguishing grid sheets, and each arc-extinguishing cavity is internally provided with three arc-extinguishing grid sheets.

In the structure, six arc extinguishing bars can have better arc extinguishing effect, and after each arc extinguishing cavity is provided with three arc extinguishing cavities, the corresponding group of static contacts and the arcs generated by the movable contacts can be extinguished, so that the two arc generating positions can have enough arc extinguishing effect.

In some examples, the slot wall of the arc extinguishing cavity is provided with an assembly slot, the arc extinguishing grid plates are slidably connected to the assembly slot, and the number of the assembly slots is matched with the number of the arc extinguishing grid plates. The assembly groove can be used for installing the arc extinguishing bars piece to can carry out spacing to the arc extinguishing bars piece through the assembly groove.

In some examples, a gold powder storage chamber is arranged on the base, an opening of the gold powder storage chamber faces to a position where the moving contact and the fixed contact are in opposite contact, and the arc extinguishing cavity is arranged on one side of the gold powder storage chamber. The gold powder storeroom can adsorb and store most of metal particles, so that the possibility that the metal particles contact with a circuit and cause the circuit to be in short circuit failure is reduced.

In some examples, two arc extinguishing chambers are arranged, and the two arc extinguishing chambers are respectively arranged on two opposite sides of the gold powder storage chamber. The two arc-extinguishing chambers can lead the base to be provided with two arc-extinguishing structures which can have higher arc-extinguishing effect,

in some examples, the housing is provided with a heat sink at least partially in the region between the two arc extinguishing chambers. The heat dissipation groove can dispel the heat to holding the chamber, and the heat dissipation of arc extinguishing chamber can be accelerated to the heat dissipation groove after being in the region between two arc extinguishing chambers, improves the arc extinguishing efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a relay according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an exploded structure of a relay in an embodiment of the present application;

fig. 3 is a partially enlarged schematic view of an embodiment of the present application after the moving contact and the fixed contact in a in fig. 2 are abutted;

FIG. 4 is a schematic view of a structure of a housing according to another embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a moving contact and a fixed contact separated after a housing is hidden in an embodiment of the present application;

FIG. 6 is a schematic diagram of a view angle of a gold powder storage chamber when a movable contact and a fixed contact are hidden by a housing in an embodiment of the present application;

FIG. 7 is a partially enlarged schematic view of FIG. 6B showing the contact between the moving contact and the stationary contact through the opening of the gold powder storage chamber according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a view angle of a gold powder storage chamber when a movable contact and a fixed contact are separated from each other in a housing according to an embodiment of the present application;

FIG. 9 is an enlarged view of part of the moving contact and the stationary contact of FIG. 8 at C through the opening of the gold powder storage chamber according to an embodiment of the present application;

fig. 10 is a schematic structural view of a single arc chute sheet according to an embodiment of the present application.

Reference numerals:

100. a housing; 110. a receiving chamber; 120. a heat sink; 121. a heat dissipation strip;

200. a base; 210. an arc extinguishing chamber; 211. an arc extinguishing structure; 2111. arc extinguishing grid plates; 2112. a limit protrusion; 212. an assembly groove; 220. a gold powder storage room; 221. a partition plate; 222. an opening;

300. a contact switching assembly; 310. a moving contact; 311. a movable contact; 312. a magneto-philic structure; 320. a stationary contact; 321. a stationary contact; 330. an elastic member; 340. an electromagnet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

In the related technical field, the relay is an automatic switching element with an isolation function and is widely applied to aspects of photovoltaic, energy storage, vehicle-mounted and the like. The contact system is an important part of the relay, the performance of the contact system influences the service life and the safety of the product, a high-power relay is needed in the existing product, the load voltage reaches 800Va.c., and the switching current at least reaches 90A. And setting a certain creepage distance and an electric gap according to related standard requirements so as to ensure the safety and the electric performance of people and property.

Currently, two relays are connected in series per phase on the AC side of a three-phase power, such as in a photovoltaic and energy storage inverter/combiner box. Due to the requirements of industries such as photovoltaics and the like on a high-power relay, the increase of the creepage distance generated by the increase of the conversion current of the power increasing relay has challenges on silver points and electrical property safety. The traditional relay with lower switching current can not meet the requirement, but the relay with a high-power shell frame has insufficient arc discharge capability.

This application can be through setting up the arc extinguishing structure in the position that the electric arc produced to extinguish the electric arc through the arc extinguishing structure, improve relay performance, guarantee relay's security.

In order to solve the above technical problems, please refer to fig. 1-10, the present application proposes a relay, which can extinguish the arc through the arc extinguishing structure 211 when the relay has larger power, thereby improving the performance of the relay and ensuring the safety of the relay.

Referring to fig. 1 to 5, the embodiment of the present application provides a relay, which includes a housing 100 and a base 200, wherein the housing 100 encloses a receiving chamber 110; the base 200 is connected with the housing 100, the base 200 is partially positioned in the accommodating cavity 110, and the contact switching assembly 300 is arranged on the base 200;

the contact switching assembly 300 includes a fixed contact 320 and a moving contact 310 capable of repeatedly contacting the fixed contact 320, the moving contact 310 and the fixed contact 320 being capable of generating an arc when separated;

at least one arc extinguishing chamber 210 is arranged on the base 200 at a position close to the contact switching assembly 300, an arc extinguishing structure 211 is arranged in the arc extinguishing chamber 210, and the arc extinguishing structure 211 is arranged on one side of the relatively abutting position of the moving contact 310 and the fixed contact 320.

Based on the above examples of the present application, the housing 100 may be used to carry the base 200, and may protect the base 200 and the components on the base 200. The contact switching assembly 300 can change the on-off state of a circuit by switching the connection contacts, when the relay power is higher, the contact switching assembly 300 can generate an electric arc in the switching process, particularly, the electric arc can be generated when the moving contact 310 and the fixed contact 320 are separated, the electric arc can interfere the function of the relay, the arc extinguishing cavity 210 is arranged on the base 200 at a position close to the contact switching assembly 300, the electric arc can be more easily introduced into the arc extinguishing cavity 210, and then the electric arc is extinguished through the arc extinguishing structure 211 in the arc extinguishing cavity 210. With the cooperation of the arc extinguishing structure 211, the relay can still safely operate under high power, and the high-power relay can be applied to circuits with higher load voltage and switching current. The embodiment of the application can extinguish the arc through the arc extinguishing structure 211 when the relay power is larger, improve the relay performance and ensure the safety of the relay.

The contact switching assembly 300 can produce the electric arc in the switching process, and the electric arc is wandering the in-process in the relay, and the condition that the electric arc probably can cause the internal device short circuit to lose efficacy, this application sets up the arc extinguishing structure 211 near contact switching assembly 300 after, can lead and extinguish the electric arc that produces, reduces the electric arc and causes the possibility that influences to other devices in the relay.

The electric arc can also convert electric energy into heat energy in the dissipation process, extra heat is generated, the temperature inside the relay can be further increased, the heat generated by the electric arc is relatively concentrated, the situation that the local temperature is too high easily occurs, and potential safety hazards exist. The arc extinguishing bars 2111 in the arc extinguishing structure 211 are generally sheet structures with relatively large areas, so that the relay has good heat dissipation performance, heat generated by an arc in the relay can be diffused, and the possibility of heat accumulation and superposition is reduced.

When the relay is larger in power, the contact switching assembly 300 inside the relay needs longer creepage distance, the creepage distance can be improved through the arc extinguishing structure 211 of the relay, the safety of the relay is further improved, and the performance of the relay is guaranteed.

Referring to fig. 5, in some examples, a moving contact 310 is movably connected to the base 200, and a magneto-philic structure 312 is disposed on the moving contact 310; the fixed contact 320 is mounted on the base 200, and the contact of the fixed contact 320 is opposite to the contact of the movable contact 310; the contact switching assembly 300 further includes a spring 330 and an electromagnet 340;

one end of the elastic member 330 is connected with the moving contact 310, and the other end is connected with the base 200, and the elastic member 330 can maintain the moving contact 310 at an initial position; the electromagnet 340 is mounted on the base 200, and the electromagnet 340 is arranged at intervals with the magneto-philic structure 312 in the moving contact 310;

after the electromagnet 340 is electrified, the electromagnet 340 can attract the magneto-philic structure 312 to move towards the direction close to the electromagnet 340, and the moving contact 310 is abutted to the fixed contact 320 under the drive of the magneto-philic structure 312;

the arc extinguishing structure 211 is disposed at one side of the contact position of the moving contact 310 and the fixed contact 320.

Based on the above examples of the present application, the moving contact 310 may move relative to the fixed contact 320, the elastic member 330 may maintain the moving contact 310 at the initial position, and the electromagnet 340 may generate an external force that drives the moving contact 310 to move. The electromagnet 340 can attract the magneto-philic structure 312 on the moving contact 310 through electromagnetic force generated after power-on, so as to overcome the elastic pretightening force of the elastic piece 330 and pull the moving contact 310 to be separated from the initial position until the moving contact 310 is abutted to the fixed contact 320. When the electromagnet 340 stops being energized to enter a standby state, the electromagnet 340 loses electromagnetic force, and the moving contact 310 is reset and maintained to an initial position by the elastic member 330.

The movable contact 311 is arranged on the movable contact 310, the fixed contact 321 is arranged on the fixed contact 320, the movable contact 311 is in contact with the fixed contact 321, the movable contact 311 is electrified after being in contact with the fixed contact 321, when the movable contact 311 is separated from the fixed contact 320, an arc can be generated, after the relay is increased in high power, the switching current generates the arc to have a longer creepage distance, and the arc can be extinguished through the arc extinguishing structure 211. The contact and separation of the movable contact 311 and the stationary contact 321 can have higher frequency, so that more arcs can be continuously generated, the generated arcs can be guided and dissipated by the arc extinguishing structure 211 in the arc extinguishing cavity 210 to be extinguished, the performance of the relay is improved, and the safety of the relay is ensured.

The movable contact 311 and the stationary contact 321 are what is commonly called a silver point, and arc extinction can be performed by arranging the arc extinction structure 211, so that the service life of the silver point can be prolonged, the safety guarantee of the relay on user property is further increased, and the safety of the electrical performance of the relay is improved.

The stationary contact 320 is disposed on a main loop stationary contact plate, or the stationary contact 320 is integrally disposed with the main loop stationary contact plate, which may be electrically connected to the main loop circuit.

The relay may have two states, one may be a normally open state, corresponding to the state when the moving contact 310 is in the initial position; the other may be normally closed, corresponding to the position when the moving contact 310 abuts against the fixed contact 320.

The initial position in this application refers to a position where the moving contact 310 is maintained under the elastic pre-tightening force of the elastic member 330 when the moving contact 310 has no electromagnetic force interference. Under the action of electromagnetic force, the moving contact 310 starts to move, and the moving contact 310 is separated from the initial position and is abutted to the corresponding fixed contact 320. After the moving contact 310 loses the electromagnetic force, the moving contact 310 returns to the initial position under the action of the elastic pre-tightening force of the elastic element 330.

The fixed contacts 320 may be provided with two, a first fixed contact and a second fixed contact, respectively.

The initial position of the moving contact can be a position abutting against the first fixed contact, at the moment, the electromagnet is arranged at a position of the second fixed contact, which is away from the first fixed contact, and when the electromagnet works, under the electromagnetic force action of the electromagnet, the moving contact starts to be away from the initial position, and the moving contact specifically breaks away from the first fixed contact and moves towards the direction of the second fixed contact until abutting against the second fixed contact. After the electromagnet stops working and stands by, the moving contact loses the electromagnetic force action of the electromagnet, and the moving contact can return to the initial position under the action of the elastic pretightening force of the elastic piece.

The initial position of the moving contact can also be arranged between the first fixed contact and the second fixed contact, the moving contact is in a suspended state, two corresponding electromagnets are arranged, namely a first electromagnet and a second electromagnet, the first electromagnet is arranged on one side of the first fixed contact, which is away from the second fixed contact, the second electromagnet is arranged on one side of the second fixed contact, which is away from the first fixed contact, and when the first electromagnet works and the second electromagnet stands by, the moving contact moves towards the direction of the first fixed contact and is abutted to the first fixed contact; when the second electromagnet works and the first electromagnet stands by, the moving contact moves towards the direction of the second fixed contact and is abutted to the second fixed contact; when both electromagnets do not work, the elastic piece resets the moving contact to the initial position.

The magnetic attracting structure 312 on the moving contact 310 corresponds to an armature in the existing relay, and the position of the moving contact 310 can be switched through the cooperation of the armature and the electromagnet 340. Specifically, after the electromagnet 340 is electrified and generates attraction force, the armature can be pulled towards the direction of the electromagnet 340 until the moving contact 310 abuts against the fixed contact 320, so that the relay state is switched.

The electromagnet 340 may include an iron core and a coil, and an electromagnetic force may be generated by energizing the coil, thereby attracting the magneto-philic structure 312 on the moving contact 310 by the electromagnetic force. Only the coil may be provided as needed, or electromagnetic force may be generated. After the iron core is additionally arranged in the coil, the electromagnetic attraction force can be stronger.

The electromagnet 340 may be turned on or off by controlling the corresponding circuit, and the magnitude of the attraction force of the electromagnet 340 may be adjusted by controlling the magnitude of the voltage of the corresponding circuit. The magneto-philic structure 312 may cooperate with the electromagnet 340 to pull the moving contact 310, and the magneto-philic structure 312 may be attracted by electromagnetic force and may move in a direction towards the electromagnet 340 in the energized state.

The magnetophilic structure 312 herein refers to a substance structure that can be attracted by the electromagnet 340, and the magnetophilic structure 312 may include simple substances or alloys of materials such as iron, nickel, cobalt, and the like.

Referring to fig. 1 to 5, in some examples, the arc extinguishing chamber 210 is disposed at a side of a contact position of the moving contact 310 and the fixed contact 320, and the housing 100 and the base 200 enclose the arc extinguishing chamber 210.

Based on the above-described examples of the present application, the arc extinguishing chamber 210 may house the arc extinguishing structure 211, and the arc extinguishing structure 211 may extinguish an arc generated between the moving contact 310 and the stationary contact 320. After the arc extinguishing chamber 210 is formed by enclosing the shell 100 and the base 200, the arrangement of the outer wall of the arc extinguishing chamber 210 can be saved, the use of materials is reduced, and the cost of the relay is reduced.

The arc extinguishing chamber 210 may specifically include three wall surfaces disposed on the base 200, and two wall surfaces disposed on the housing 100, where the five wall surfaces enclose the arc extinguishing chamber 210 forming a single-side communication accommodating chamber 110, and the communication position faces the opposite abutting position of the moving contact 310 and the fixed contact 320.

In some examples, the arc extinguishing structure 211 includes at least one of a grid arc extinguishing structure 211, a slot arc extinguishing structure 211, a magnetic blow-out arc extinguishing structure 211, and an electrodynamic arc extinguishing structure 211.

Based on the above examples of the present application, the above structure introduces four kinds of arc extinguishing structures 211, and the arc extinguishing structures 211 of the present application are not limited to the above four kinds of structures.

In the embodiment of the application, the gate arc extinguishing structure 211 is taken as an example for illustration, in the working process of the relay, the moving contact 310 and the fixed contact 320 are contacted and separated more frequently, when the moving contact 310 is separated from the fixed contact 320, a certain arc is generated, and the arc extinguishing structure 211 arranged at one side of the fixed contact 320 can absorb and convert the arc to be extinguished, so that the arc extinguishing effect is finally realized.

In some examples, the arc suppressing structure 211 is a grid arc suppressing structure 211, with at least two arc suppressing grid segments 2111 disposed within each arc suppressing cavity 210.

Based on the above example of the present application, after two arc extinguishing bars 2111 are disposed in each arc extinguishing chamber 210, the arc extinguishing structure 211 can be guaranteed to have a certain arc extinguishing effect, and the validity of the arc extinguishing structure 211 is guaranteed.

In the grid arc extinguishing structure 211, the arc extinguishing grid 2111 may be a U-shaped grid, the U-shaped grid may have an arc extinguishing groove, and the moving track of the moving contact 310 may at least partially pass near the arc extinguishing groove of the arc extinguishing grid 2111, so that when the moving contact leaves the fixed contact 320 and generates an arc, arc extinguishing can be performed in time through the arc extinguishing grid 2111.

Referring to fig. 5, in some examples, the fixed contact 320 has two fixed contacts 321 arranged at intervals, the moving contact 310 has two moving contacts 311 arranged at intervals, and the fixed contacts 321 are in one-to-one correspondence with the moving contacts 311;

the number of the arc extinguishing chambers 210 is two, each arc extinguishing chamber 210 corresponds to a group of fixed contacts 321 and movable contacts 311, six arc extinguishing grid plates 2111 are arranged on the base 200, and three arc extinguishing grid plates 2111 are arranged in each arc extinguishing chamber 210.

Based on the above example of the present application, each set of the stationary contact 321 and the movable contact 311 corresponds to one circuit, and the above structure can control both circuits at the same time. The six arc extinguishing bars 2111 can have better arc extinguishing effect, and after three arc extinguishing chambers 210 are arranged in each arc extinguishing chamber 210, arcs generated by a corresponding group of stationary contacts 321 and moving contacts 311 can be extinguished, so that two arc generating positions can be guaranteed to have enough arc extinguishing effect.

Referring to fig. 6 to 9, in some examples, the slot wall of the arc extinguishing chamber 210 is provided with a fitting slot 212, and the arc extinguishing bars 2111 are slidably connected to the fitting slot 212, and the number of the fitting slots 212 is adapted to the number of the arc extinguishing bars 2111.

Based on the above-described examples of the present application, the fitting groove 212 may be used to mount the arc chute 2111, and the arc chute 2111 may be restrained by the fitting groove 212.

The assembly groove 212 may have a long-strip-shaped groove-shaped structure with a square cross section, and the edge of the arc extinguishing bar 2111 may be directly connected to the assembly groove 212 in a sliding manner, or a limit protrusion 2112 may be provided at the edge of the arc extinguishing bar 2111 and connected to the assembly groove 212 in a sliding manner through the limit protrusion 2112. The mounting groove 212 may also be a dovetail groove or other shaped groove-like structure.

Referring to fig. 6 to 9, in some examples, a gold powder storage chamber 220 is provided on the base 200, an opening 222 of the gold powder storage chamber 220 faces the stationary contact 320, and the arc extinguishing chamber 210 is provided at one side of the gold powder storage chamber 220.

Based on the above example of the present application, the process of breaking and connecting the moving contact 310 and the fixed contact 320 is a repeated knocking process, in which a certain amount of metal particles are generated, and the metal powder storage room 220 can adsorb and store most of the metal particles, so as to reduce the possibility that the metal particles contact the circuit and cause the circuit to fail due to short circuit. The arc extinguishing chamber 210 can pull and extinguish the arc generated in the process that the moving contact 310 knocks the fixed contact 320, so that the safety and reliability of the gold powder storage chamber 220 are ensured.

The generation of the electric arc also has a certain attraction effect on the metal particles, and when the opening 222 of the gold powder storage chamber 220 faces the static contact 320, most of the metal particles can be gathered into the gold powder storage chamber 220, so that the hidden danger of the metal particles is reduced.

At least one partition 221 may be disposed in the gold powder storage chamber 220, and the partition 221 may divide the gold powder storage chamber 220 into at least two chambers to further improve the performance of the gold powder storage chamber 220.

Referring to fig. 6 and 8, in some examples, the arc extinguishing chambers 210 are provided in two, and the two arc extinguishing chambers 210 are respectively located at opposite sides of the gold powder storage chamber 220.

Based on the above-mentioned example of this application, two arc extinguishing structures 211 can be set up on two arc extinguishing chambers 210 can make base 200, and two arc extinguishing structures 211 can have higher arc extinguishing effect, and the cooperation of two arc extinguishing chambers 210 can guide metal particle to the gold powder storeroom 220 in better, further improves the reliability of gold powder storeroom 220.

In some examples, the case 100 is provided with a heat dissipation groove 120, and the heat dissipation groove 120 is at least partially located in a region between the two arc extinguishing chambers 210, with particular reference to fig. 1, 2, and 4.

Based on the above example of the present application, the heat dissipation groove 120 can dissipate heat from the accommodating cavity 110, and after the heat dissipation groove 120 is located in the area between the two arc extinguishing cavities 210, the heat dissipation of the arc extinguishing cavities 210 can be quickened, so as to improve the arc extinguishing efficiency. In addition, the heat sink 120 may be disposed at a position compatible with the gold powder storage 220, the heat sink 120 may share a wall surface with the gold powder storage 220, and the metal particles may be more easily adsorbed into the gold powder storage 220 through the heat sink 120.

In the arc extinguishing process, after the electric arc enters the arc extinguishing structure 211, the electric energy of the electric arc can be converted into heat energy, and the heat energy is emitted through free gas, so that the electric arc completely disappears. The heat dissipation groove 120 can dissipate heat generated by the arc extinguishing structure 211 as soon as possible, after the heat dissipation efficiency is improved, the risk of heat accumulation in the relay can be reduced, and after the heat dissipation efficiency is improved, the arc extinguishing effect of the arc extinguishing structure 211 can be improved.

The bottom of the heat sink 120 may be inclined with respect to the corresponding outer circumferential surface of the case 100, and at least one heat sink bar 121 may be provided at the bottom. The heat dissipation efficiency of the heat dissipation groove 120 can be further improved by the arrangement of the heat dissipation strips 121. Further, the heat dissipation strips 121 may be hollowed, and heat dissipation holes may be formed in the first heat dissipation strips 121, and the size of the heat dissipation holes may be smaller, so that the influence of the heat dissipation holes on the gold powder storage room 220 is reduced.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, this is for convenience of description and simplification of the description, but does not indicate or imply that the apparatus or element to be referred must be provided with a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely used for illustration and are not to be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.

The foregoing description of the preferred embodiment of the present utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (10)

1. A relay, comprising:

a housing enclosing the housing to form a receiving cavity;

a base connected with the shell, the base being partially positioned in the accommodating cavity, and a contact switching assembly being arranged on the base;

the contact switching assembly comprises a fixed contact and a moving contact capable of repeatedly contacting the fixed contact, and the moving contact and the fixed contact can generate an electric arc when being separated;

the base is provided with at least one arc-extinguishing cavity near the position of the contact switching assembly, an arc-extinguishing structure is arranged in the arc-extinguishing cavity, and the arc-extinguishing structure is arranged on one side of the relative abutting position of the moving contact and the static contact.

2. The relay according to claim 1, wherein the moving contact is movably connected with the base, a magneto-philic structure is arranged on the moving contact, the fixed contact is arranged on the base, and a contact of the fixed contact is opposite to a contact of the moving contact;

the contact switching assembly further comprises:

one end of the elastic piece is connected with the moving contact, the other end of the elastic piece is connected with the base, and the elastic piece can maintain the moving contact at an initial position;

the electromagnet is arranged on the base and is arranged at intervals with the magneto-philic structure in the moving contact;

after the electromagnet is electrified, the electromagnet can attract the magnet-attracting structure to move towards the direction close to the electromagnet, and the moving contact is abutted to the fixed contact under the drive of the magnet-attracting structure.

3. The relay according to claim 2, wherein the arc extinguishing chamber is disposed at one side of the position where the moving contact and the fixed contact are relatively abutted, and the housing and the base enclose the arc extinguishing chamber.

4. The relay of claim 1, wherein the arc quenching structure comprises at least one of a gate quenching structure, a slot quenching structure, a magnetic blow quenching structure, and an electrodynamic quenching structure.

5. The relay of claim 1, wherein the arc suppressing structure is a gate arc suppressing structure, and at least two arc suppressing gate plates are disposed in each arc suppressing cavity.

6. The relay of claim 5, wherein the fixed contact is provided with two fixed contacts which are arranged at intervals, the moving contact is provided with two moving contacts which are arranged at intervals, and the fixed contacts are in one-to-one correspondence with the moving contacts;

the base is provided with six arc-extinguishing grid sheets, and each arc-extinguishing cavity is internally provided with three arc-extinguishing grid sheets.

7. The relay of claim 5, wherein the slot wall of the arc extinguishing chamber is provided with an assembly slot, the arc extinguishing gate sheets are slidably connected to the assembly slot, and the number of the assembly slots is matched with the number of the arc extinguishing gate sheets.

8. The relay of claim 2, wherein a gold powder storage chamber is arranged on the base, an opening of the gold powder storage chamber faces to a position where the moving contact and the fixed contact are in opposite contact, and the arc extinguishing chamber is arranged on one side of the gold powder storage chamber.

9. The relay of claim 8, wherein two of said arc extinguishing chambers are provided, and wherein two of said arc extinguishing chambers are located on opposite sides of said gold powder storage chamber.

10. The relay of claim 9, wherein the housing is provided with a heat sink at least partially in a region between the two arc extinguishing chambers.