Relay

Abstract

The utility model discloses a relay which comprises a shell, an internal part, a coil assembly, an exciter and a monitoring control assembly. The internal component is configured to switch the relay between a closed state and an open state in response to an input signal. The coil assembly is used for driving the internal component to move. The exciter is configured to generate gas impact force when the exciter is activated, and the gas impact force is used for driving the internal part to move, so that the relay is switched from a closed state to an open state; the monitoring control assembly is electrically connected with the coil assembly and the exciter, and is configured to monitor a current value passing through the internal part, and control the coil assembly to be powered off or activate the exciter according to a comparison result of the current value, a first threshold value and a second threshold value; the first threshold is smaller than the second threshold. When the current value is larger than or equal to the first threshold value and smaller than the second threshold value, the monitoring control assembly controls the coil assembly to be powered off. When the current value is larger than or equal to the second threshold value, the monitoring control assembly activates the exciter.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric control devices, in particular to a relay. BACKGROUND

[0002] A relay is an electronic control device, which has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually applied in an automatic control circuit. The relay is actually a kind of "automatic switch" for controlling a larger current with a smaller current. Therefore, the relay plays a role of automatic adjustment, safety protection, and conversion of a circuit in the circuit.

[0003] When an abnormal overload such as overcurrent occurs in the power circuit, the relay is required to break the circuit to cut off the overload current of the circuit, thereby playing a role of safety protection. When the load to be broken (high voltage and large current) is large, the relay contacts will produce an arc, and the contacts will be fiercely burned in an instant, which is not conducive to breaking. CONTENT OF THE INVENTION

[0004] The relay provided by the embodiments of the present application can be broken in different ways according to different current values, thereby solving the problem of being not conducive to breaking due to arc in the related art.

[0005] The relay of the embodiments of the present application comprises:

[0006] a housing;

[0007] internal components movably arranged in the housing and configured to switch a state of the relay from a closed state to an open state and from the open state to the closed state in response to an input signal;

[0008] a coil assembly for driving the internal components to move;

[0009] an exciter arranged in the housing and configured to generate a gas impact force for driving the internal components to move when the exciter is activated, so as to switch the relay from the closed state to the open state; and

[0010] a monitoring and control assembly electrically connected with the coil assembly and the exciter and configured to monitor a current value passing through the internal components, and control the coil assembly to be powered off or the exciter to be activated according to a comparison result of the current value with a first threshold value and a second threshold value; the first threshold value is smaller than the second threshold value.

[0011] When the current value is greater than or equal to the first threshold value and less than the second threshold value, the monitoring control assembly controls the coil assembly to be powered off; and when the current value is greater than or equal to the second threshold value, the monitoring control assembly activates the exciter.

[0012] According to some embodiments of the present application, the monitoring control assembly comprises a circuit board and a Hall sensor, the circuit board is located outside the shell and is electrically connected with the coil assembly and the exciter respectively, and the Hall sensor is arranged on the circuit board and is used for monitoring the current value passing through the internal component.

[0013] According to some embodiments of the present application, the shell is provided with a static contact, the internal component has a movable contact, and the movable contact is used for contacting or separating from the static contact; when the relay is in the closed state, the movable contact contacts the static contact; and when the relay is in the open state, the movable contact separates from the static contact.

[0014] The Hall sensor is configured to monitor the current value passing through the movable contact.

[0015] According to some embodiments of the present application, the shell comprises an insulating cover, the insulating cover has a top wall and a side wall connected with each other, the movable contact is movably arranged in a cavity surrounded by the top wall and the side wall, the top wall is provided with the static contact, and the circuit board is located on the outer circumferential side of the side wall.

[0016] According to some embodiments of the present application, the relay further comprises a temperature monitoring assembly, the temperature monitoring assembly is electrically connected with the monitoring control assembly and is used for monitoring the temperature of the shell.

[0017] According to some embodiments of the present application, the temperature monitoring assembly comprises a mounting member and a temperature sensor, the mounting member is arranged on the outer wall surface of the shell, and the temperature sensor is arranged on the mounting member and is electrically connected with the monitoring control assembly and is used for monitoring the temperature of the shell.

[0018] According to some embodiments of the present application, the shell is provided with a plurality of pairs of static contacts, a normal projection of each of the static contacts on a target plane is a first projection, and geometric centers of a plurality of the first projections are connected in a loop shape.

[0019] A normal projection of the temperature sensor on the target plane is a second projection, and the second projection is located at the geometric center of the loop shape.

[0020] The target plane is perpendicular to the movement direction of the internal component.

[0021] According to some embodiments of the present application, the loop shape is a rectangle.

[0022] According to some embodiments of the present application, the temperature monitoring assembly further comprises two conductive members, the mounting member covering part of the outer periphery of the conductive members; one end of the two conductive members is electrically connected to the monitoring control assembly, and the other end is electrically connected to the temperature sensor.

[0023] According to some embodiments of the present application, the housing has a through hole that penetrates the inner wall surface and the outer wall surface of the housing.

[0024] The exciter is mounted on the outer wall surface of the housing and seals the through hole.

[0025] According to some embodiments of the present application, the exciter is mounted on the outer wall surface of the housing through an adapter.

[0026] According to some embodiments of the present application, the adapter comprises an adapter sleeve and an adapter flange, one axial end of the adapter sleeve is connected to the outer wall surface of the housing, and the adapter flange is connected to the other axial end of the adapter sleeve and protrudes from the outer peripheral side surface of the adapter sleeve.

[0027] The exciter comprises a body and a lap joint portion, the body is inserted into the adapter sleeve, the lap joint portion is connected to the outer peripheral side surface of the body and is lapped on the side surface of the adapter flange away from the housing.

[0028] According to some embodiments of the present application, the adapter is made of plastic or wood.

[0029] The above-mentioned one embodiment has at least the following advantages or beneficial effects:

[0030] The relay of the embodiments of the present application adopts different breaking modes according to the size of the current value through the internal components and based on the comparison result of the current value with the first threshold value and the second threshold value, that is, when the current value is greater than or equal to the first threshold value and less than the second threshold value, the coil assembly is controlled to be powered off; when the current value is greater than the second threshold value, the exciter is activated to force breaking, thus realizing "step" breaking. On the one hand, when the current value is slightly greater than the normal current value, the coil assembly is controlled to be powered off in time to realize breaking, preventing the contact point from being fused and adhered due to untimely breaking, which causes breaking by the coil power-off mode to be impossible; on the other hand, the exciter forced breaking can be used as the final safety guarantee means, avoiding the problem of contact point intense arcing caused by untimely breaking due to short-circuit current passing, and even the problem of relay explosion; on the other hand, when the current value through the internal components is only slightly greater than the normal current value, the coil is only needed to be powered off to complete the breaking, and the exciter forced breaking is not needed, so the relay can still be used and is not completely scrapped. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 Fig. 6 shows an exploded view of a relay according to an embodiment of the application.

[0032] Figure 2 Fig. 7 shows a cross-sectional view of a relay according to an embodiment of the application.

[0033] Figure 3 Fig. 8 shows a perspective view of a relay according to another embodiment of the application.

[0034] Figure 4 Fig. 9 shows an exploded view of a relay according to another embodiment of the application.

[0035] Figure 5 Fig. 10 shows a schematic view of the relative positions of the monitoring control assembly, the stationary contact, and the movable contact of a relay according to another embodiment of the application.

[0036] Figure 6 Fig. 11 shows a perspective view of a temperature monitoring assembly.

[0037] Figure 7 Fig. 12 shows a schematic view of the positions of the first projection and the second projection.

[0038] Figure 8 Fig. 13 shows an exploded view of the internal components.

[0039] In the drawings, the following reference numerals are used:

[0040] 100, housing

[0041] 101, through hole

[0042] 102, extension

[0043] 103, gas storage cavity

[0044] 110, insulating cover

[0045] 111, top wall

[0046] 112, side wall

[0047] 120, frame piece

[0048] 130, yoke plate

[0049] 140, metal cover

[0050] 200, stationary contact

[0051] 300, internal components

[0052] 310, push rod member

[0053] 311, insertion slot

[0054] 3111, clamping slot

[0055] 320, pressure receiving member

[0056] 321, base

[0057] 322, side

[0058] 323, connecting portion

[0059] 3231, clamping block

[0060] 324, protrusion

[0061] 330, movable contact

[0062] 340, elastic member

[0063] 500, exciter

[0064] 510, body

[0065] 520, overlapping portion

[0066] 600, adapter

[0067] 610, adapter sleeve

[0068] 620, adapter flange

[0069] 700, coil assembly

[0070] 710, coil holder

[0071] 720, coil

[0072] 800, monitoring control assembly

[0073] 810, circuit board

[0074] 820, Hall sensor

[0075] 900, temperature monitoring assembly

[0076] 910, mounting member

[0077] 920, temperature sensor

[0078] 930, electrically conductive member DETAILED DESCRIPTION

[0079] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings. Example embodiments, may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and description of the same or like elements may be simplified in some instances through cross references instead of repeating description.

[0080] It is to be understood that the terms "including", "comprising", "having" and any variations thereof in the present application are intended to cover both the inclusive and the exclusive cases. For example, a process, method, system, product, or apparatus that comprises a list of steps or elements is not necessarily limited to those listed steps or elements, but can include additional steps or elements not expressly listed or inherent to such process, method, product, or apparatus.

[0081] As shown in Figure 1 and Figure 2 , the relay of the embodiments of the present application comprises a housing 100, an internal component 300, and an igniter 500. The internal component 300 is movably arranged in the housing 100 and is configured to switch the state of the relay from a closed state to an open state and from an open state to a closed state in response to an input signal. The igniter 500 is arranged in the housing 100 and is configured to be activated to generate a gas impact force when a threshold current passes through the internal component 300, the gas impact force being capable of driving the internal component 300 to move so as to switch the relay from the closed state to the open state.

[0082] In the embodiments of the present application, the igniter 500 can be activated to generate a gas impact force when a threshold current passes through the internal component 300, the gas impact force being capable of driving the internal component 300 to move so as to switch the relay from the closed state to the open state. In this way, the igniter 500 can function as a "fuse" to timely break the relay when a threshold current passes through the internal component 300, which is conducive to improving the anti-sticking property of the movable contact and the static contact and achieving rapid arc extinction.

[0083] In an embodiment, the igniter 500 can comprise gunpowder. When a threshold current passes through the internal component 300, the gunpowder can generate a large amount of gas to form a gas impact force in an instant, the gas impact force being capable of driving the internal component 300 to move so as to switch the relay from the closed state to the open state.

[0084] For example, the igniter 500 can be an electric detonator or an electric blasting tube, but is not limited thereto.

[0085] Please continue to refer to Figure 1 and Figure 2 , the housing 100 is a hermetically sealed housing, and such hermetically sealed structure is conducive to preventing electric arcs between adjacent conductive elements in the relay and to providing electrical isolation between the movable contact and the static contact.

[0086] The housing 100 can comprise an insulating cover 110, a frame 120, a yoke plate 130, and a metal cover 140. The insulating cover 110 and the frame 120 are located on one side of the thickness direction of the yoke plate 130, and the metal cover 140 is located on the other side of the thickness direction of the yoke plate 130.

[0087] In an embodiment, the insulating cover 110 is made of ceramic material, and is connected with the yoke plate 130 through the frame 120. The frame 120 can be a metal piece in a ring structure, such as iron-nickel alloy. One end of the frame 120 is connected to the opening edge of the insulating cover 110, for example, by means of laser welding, brazing, resistance welding, gluing, etc. The other end of the frame 120 is connected to the yoke plate 130, which can also be connected by means of laser welding, brazing, resistance welding, gluing, etc. The frame 120 is arranged between the insulating cover 110 and the yoke plate 130, facilitating the connection of the insulating cover 110 and the yoke plate 130.

[0088] The insulating cover 110 includes a top wall 111 and a side wall 112. The top wall 111 is located at one end of the inner component 300, and the side wall 112 is located at the circumferential side of the inner component 300. The top wall 111 is provided with the static contact 200. When the relay is in the closed state, the inner component 300 is in contact with the static contact 200; when the relay is in the open state, the inner component 300 is separated from the static contact 200. One end of the side wall 112 is connected to the edge of the top wall 111, and the other end of the side wall 112 is connected to the yoke plate 130 through the frame 120.

[0089] The side wall 112 can be a rectangular ring structure, a circular ring structure, or other ring structures, which are not particularly limited in the present application.

[0090] As shown in Figure 8 The inner component 300 includes a push rod member 310, a movable contact 330, and an elastic member 340. The movable contact 330 is arranged on the push rod member 310 and is used to contact or separate from the static contact 200. The elastic member 340 is used to provide contact pressure to the movable contact 330. When the relay is in the closed state, the movable contact 330 is in contact with the static contact 200; when the relay is in the open state, the movable contact 330 is separated from the static contact 200.

[0091] When the relay is in the closed state, i.e., the movable contact 330 is in contact with the static contact 200, the monitoring control assembly 800 can monitor the current value passing through the movable contact 330.

[0092] As shown in Figure 1 and Figure 8As shown, the relay further comprises a plurality of pairs of static contacts 200. The internal component 300 comprises a plurality of elastic members 340 and a plurality of spaced-apart movable contact pieces 330, the plurality of movable contact pieces 330 are arranged on the push rod member 310 and are used to respectively contact or separate from the plurality of pairs of static contacts 200, and the plurality of elastic members 340 respectively correspond to the plurality of movable contact pieces 330. Each movable contact piece 330 corresponds to a pair of static contacts 200. When the relay is in the closed state, the plurality of movable contact pieces 330 are in contact with the plurality of pairs of static contacts 200, and when the relay is in the open state, the plurality of movable contact pieces 330 are separated from the plurality of pairs of static contacts 200.

[0093] In the embodiment of the present application, the plurality of movable contact pieces 330 are arranged on the same push rod member 310, each movable contact piece 330 corresponds to a pair of static contacts 200, and when the push rod member 310 moves, the plurality of movable contact pieces 330 move simultaneously, thereby realizing the effect of "single drive and multiple movement", which is conducive to the miniaturization and integration of the relay, and at the same time, to a certain extent, reduces the cost of the product.

[0094] As shown in the figure, Figures 3 to 5 The relay further comprises a coil assembly 700 and a monitoring control assembly 800. The coil assembly 700 is located on the side of the yoke plate 130 away from the static contacts 200, and comprises a coil holder 710 and a coil 720, the coil holder 710 is sleeved on the outer periphery of the metal cover 140, and the coil 720 is wound on the coil holder 710. By controlling the power-on or power-off of the coil 720, the internal component 300 can be driven to move.

[0095] The monitoring control assembly 800 is electrically connected with the coil 720 of the coil assembly 700 and the exciter 500, and is configured to monitor the current value passing through the internal component 300, and according to the comparison result of the current value with the first threshold value and the second threshold value, control the coil assembly 700 to be powered off or activate the exciter 500; the first threshold value is less than the second threshold value; when the current value is greater than or equal to the first threshold value and less than the second threshold value, the monitoring control assembly 800 controls the coil assembly 700 to be powered off; when the current value is greater than or equal to the second threshold value, the monitoring control assembly 800 activates the exciter 500.

[0096] In work, the monitoring control assembly 800 can monitor the current value passing through the internal component 300, compare the current value with the first threshold value and the second threshold value, and make an action according to the comparison result.

[0097] For example, if the current value obtained by the monitoring control component 800 is less than the first threshold value, it indicates that the current value passing through the internal component 300 is normal, and the relay does not need to be tripped; if the current value obtained by the monitoring control component 800 is greater than or equal to the first threshold value and less than the second threshold value, it indicates that the current value passing through the internal component 300 is slightly higher than the normal current value, and the tripping can be completed by controlling the coil assembly 700 to be powered off; if the current value obtained by the monitoring control component 800 is greater than the second threshold value, it indicates that the current value passing through the internal component 300 is much higher than the normal current value, and the coil assembly 700 may not be able to normally trip at this time, so the gas impact force is generated by activating the initiator 500, and the internal component 300 is forcibly driven to move by using the gas impact force, so that the relay is switched from the closed state to the open state, and the tripping purpose is achieved.

[0098] Therefore, the relay of the embodiment of the present application adopts different tripping modes according to the size of the current value passing through the internal component 300 and based on the comparison result of the current value with the first threshold value and the second threshold value, that is, the coil assembly 700 is powered off when the current value is greater than or equal to the first threshold value and less than the second threshold value, and the initiator 500 is activated to forcibly trip when the current value is greater than the second threshold value, so that the "step" tripping is realized. On the one hand, when the current value is slightly greater than the normal current value, the coil assembly 700 is controlled to be powered off in time to realize tripping, which prevents the contact point from being melted and adhered due to untimely tripping, and thus the relay cannot be tripped by powering off the coil 720. On the other hand, the initiator 500 forcibly trips, which can be used as the final safety guarantee means to avoid the problem of the relay explosion caused by the contact point being severely arced due to the untimely tripping of the short-circuit current. On the other hand, when the current value passing through the internal component 300 is only slightly greater than the normal current value, the tripping can be completed by only controlling the coil to be powered off, and the initiator 500 does not need to be used to forcibly trip, so that the relay can still be used and is not completely scrapped.

[0099] The monitoring control component 800 is located outside the housing 100 and includes a circuit board 810 and a Hall sensor 820. The circuit board 810 is electrically connected with the coil assembly 700 and the initiator 500, respectively. The Hall sensor 820 is arranged on the circuit board 810 and is used to monitor the current value passing through the moving contact 330 of the internal component 300.

[0100] It should be noted that when the current passes through the movable contact 330, a magnetic field perpendicular to the direction of the current will be generated around the movable contact 330. Since the Hall sensor 820 is located at the outer periphery of the housing 100, when the current passes through the Hall sensor 820, a Hall voltage will be generated in the Hall sensor 820, and the magnitude of the voltage is proportional to the current intensity passing through the movable contact 330. Based on the proportional relationship between the current intensity and the magnitude of the voltage generated by the Hall sensor 820, the current value passing through the movable contact 330 can be obtained.

[0101] In an embodiment, the circuit board 810 is located at the outer periphery side of the side wall 112 of the insulating cover 110.

[0102] As shown in Figure 3 and Figure 4 The relay further comprises a temperature monitoring assembly 900, which is electrically connected with the monitoring control assembly 800 and used for monitoring the temperature of the housing 100. By monitoring the temperature of the housing 100 in real time through the temperature monitoring assembly 900, the monitoring control assembly 800 can timely learn the heating condition of the relay during operation, and further make an early prediction on abnormal working conditions.

[0103] As shown in Figure 6 The temperature monitoring assembly 900 comprises a mounting member 910 and a temperature sensor 920. The mounting member 910 is arranged on the outer wall surface of the housing 100, and the temperature sensor 920 is arranged on the mounting member 910 and electrically connected with the monitoring control assembly 800, and used for monitoring the temperature of the housing 100.

[0104] In an embodiment, the temperature sensor 920 can be a thermistor, and further, the thermistor can be a negative temperature coefficient thermistor or a positive temperature coefficient thermistor.

[0105] The temperature monitoring assembly 900 further comprises two conductive members 930, and the mounting member 910 covers part of the outer periphery of the conductive members 930. One end of the two conductive members 930 is electrically connected with the monitoring control assembly 800, and the other end is electrically connected with the temperature sensor 920.

[0106] As an example, the mounting member 910 is made of insulating material, such as plastic. When the mounting member 910 is made of plastic, the mounting member 910 and the conductive members 930 can be integrally injection molded.

[0107] As shown in Figure 3 and Figure 7As shown, when the relay has multiple pairs of stationary contacts 200, the orthographic projection of each stationary contact 200 on a target plane is a first projection S1, and the geometric centers of multiple first projections S1 are connected end to end to form a ring; the orthographic projection of the temperature sensor 920 on the target plane is a second projection S2, and the second projection S2 is located at the geometric center of the ring; wherein, the target plane is perpendicular to the direction of movement of the internal component 300.

[0108] In this embodiment of the application, the temperature sensor 920 is located at the center of multiple pairs of stationary contacts 200, so that the temperature monitored by the temperature sensor 920 is closest to the temperature of the contact area of ​​the moving and stationary contacts.

[0109] In one embodiment, the stationary contact 200 and the temperature monitoring component 900 are located on the same side of the housing 100, for example, the stationary contact 200 and the temperature monitoring component 900 are located on the side where the top wall 111 of the insulating cover 110 is located.

[0110] It should be noted that the temperature sensor 920 and the exciter 500 need to be misaligned to avoid interference between the exciter 500 and the temperature sensor 920.

[0111] In one embodiment, the ring is rectangular, but this is not a limitation.

[0112] like Figure 2 As shown, the housing 100 has a through hole 101, which penetrates the inner and outer walls of the housing 100; the exciter 500 is installed on the outer wall of the housing 100 and seals the through hole 101.

[0113] The exciter 500 is installed on the outer wall of the housing 100 and seals the through hole 101 of the housing 100. On the one hand, when assembling the exciter 500, the operator can operate from outside the housing 100, with a larger operating space and convenient assembly. On the other hand, since the exciter 500 is installed on the outer wall of the housing 100 and not inside the housing 100, it will not occupy the internal space of the housing 100, which is conducive to realizing the miniaturization design of the relay.

[0114] In one embodiment, the top wall 111 has a through hole 101 that penetrates the inner and outer wall surfaces of the top wall 111, and the exciter 500 is installed on the top wall 111.

[0115] like Figure 2 As shown, at least a portion of the actuator 500 is located within the through-hole 101. When the actuator 500 is activated to generate a gas impact force, since at least a portion of the actuator 500 is located within the through-hole 101, the gas impact force can act on the internal component 300 more quickly, causing the relay to switch from a closed state to an open state quickly, thus improving the breaking efficiency.

[0116] like Figure 2As shown, the igniter 500 is mounted on the outer wall surface of the top wall 111 of the insulating cover 110 through the adapter 600.

[0117] In the embodiment, the igniter 500 is connected to the insulating cover 110 through the adapter 600 instead of being directly connected to the insulating cover 110, so that the heat generated by the relay during operation can be prevented from being transmitted to the igniter 500 and causing the igniter 500 to be mistakenly triggered.

[0118] In the embodiment, the adapter 600 can be made of a material with poor thermal conductivity, such as plastic or wood, so that the heat of the insulating cover 110 can be further prevented from being transmitted to the igniter 500.

[0119] In an embodiment, the adapter 600 includes an adapter sleeve 610 and an adapter flange 620. The adapter sleeve 610 is connected to the outer wall surface of the housing 100 at one axial end, and the adapter flange 620 is connected to the other axial end of the adapter sleeve 610 and protrudes from the outer circumferential surface of the adapter sleeve 610. The igniter 500 includes a body 510 and a lap portion 520. The body 510 is arranged in the adapter sleeve 610, and the lap portion 520 is connected to the outer circumferential surface of the body 510 and lapped on the side surface of the adapter flange 620 away from the housing 100. The body 510 is internally provided with gunpowder.

[0120] In another embodiment, the adapter 600 can only include the adapter sleeve 610. One axial end of the adapter sleeve 610 is connected to the top wall 111 of the insulating cover 110, and the other axial end is connected to the igniter 500.

[0121] In another embodiment, the adapter sleeve 610 has two adapter flanges 620 arranged at both axial ends. One of the adapter flanges 620 is connected to the top wall 111 of the insulating cover 110, and the other adapter flange 620 is connected to the igniter 500.

[0122] It can be understood that the adapter 600 can be connected to the insulating cover 110 and the igniter 500 by welding, gluing or other methods, which are not particularly limited in the present application.

[0123] As shown in FIGS. 1, 2 and 3, the insulating cover 110 has a top wall 111 and a bottom wall 112. The top wall 111 has a through hole 101, and the bottom wall 112 has a through hole 102. The adapter 600 is connected to the top wall 111 of the insulating cover 110. Figure 2 and Figure 8 As shown in FIGS. 1, 2 and 3, the insulating cover 110 has a top wall 111 and a bottom wall 112. The top wall 111 has a through hole 101, and the bottom wall 112 has a through hole 102. The adapter 600 is connected to the top wall 111 of the insulating cover 110.

[0124] In the embodiment of the application, the inner component 300 further comprises a pressure receiving member 320, when the relay is in the closed state, the pressure receiving member 320, the extension 102 and the trigger 500 form a gas storage cavity 103, and the gas generated after the trigger 500 is activated is first gathered in the gas storage cavity 103. Compared with the volume of the insulating cover 110, the volume of the gas storage cavity 103 is smaller, which is more conducive to the formation of a larger impact force of the gas, thereby enabling the relay to quickly switch to the open state.

[0125] As shown in Figure 8 , the pressure receiving member 320 comprises a base 321, a side 322 and a connecting part 323. The side 322 is connected to the edge of the base 321 and extends from the base 321 towards the direction close to the trigger 500; the connecting part 323 is connected to the base 321 and / or the side 322 and is connected with the push rod member 310; wherein, when the relay is in the closed state, the base 321 covers the through hole 101, and the side 322 covers the outer periphery of the extension 102.

[0126] In the embodiment of the application, the side 322 is connected to the edge of the base 321 and extends from the base 321 towards the direction close to the trigger 500, and the side 322 and the base 321 are substantially in a "bowl-shaped" structure. When the relay is in the closed state, the base 321 covers the through hole 101, and the side 322 covers the outer periphery of the extension 102, which is conducive to the pressure receiving member 320 covering the through hole 101, thereby forming a relatively sealed space for the gas storage cavity 103, and more conducive to the trigger 500 generating a larger impact force of the gas.

[0127] The pressure receiving member 320 further comprises a protruding part 324, which is protruded from one side surface of the base 321 towards the extension 102; when the relay is in the closed state, the protruding part 324 extends into the through hole 101. The protruding part 324 extending into the through hole 101 can further compress the space of the gas storage cavity 103, which is conducive to the effect of accumulating gas in a smaller space to generate a larger impact force.

[0128] As shown in Figure 8 , the push rod member 310 has a slot 311, and the connecting part 323 is detachably inserted into the slot 311. In an embodiment, the slot wall of the slot 311 has a clamping groove 3111, and the connecting part 323 has a clamping block 3231 for clamping into the clamping groove 3111.

[0129] In summary, the relay of the embodiment of the application has at least the following advantages and beneficial effects:

[0130] The relay of the embodiments of the present application adopts different breaking modes according to the size of the current value of the internal component 300 and based on the comparison result of the current value with the first threshold value and the second threshold value, that is, when the current value is greater than or equal to the first threshold value and less than the second threshold value, the coil assembly 700 is controlled to be powered off; when the current value is greater than the second threshold value, the activator 500 is activated to force breaking, thus realizing "step" breaking. On the one hand, when the current value is slightly greater than the normal current value, the coil assembly 700 is powered off in time to realize breaking, preventing the contact point from being melted and adhered due to untimely breaking, thus causing breaking by the coil 720; on the other hand, the activator 500 forces breaking, which can be used as the final safety guarantee, avoiding the problem of severe arcing of the contact point and even explosion of the relay due to untimely breaking caused by the short-circuit current; on the other hand, when the current value of the internal component 300 is only slightly greater than the normal current value, the coil is only needed to be powered off to complete breaking, without the need of using the activator 500 to force breaking, so that the relay can still be used and is not completely scrapped.

[0131] It can be understood that the various embodiments / implementation modes provided by the present application can be combined with each other without contradiction, which will not be illustrated one by one here.

[0132] In the embodiments of the present application, the terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, can also be detachable connection, or integral connection; "connecting" can be direct connection, or indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0133] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the present application.

[0134] In the description of the application, the terms "one embodiment", "some embodiments", "certain embodiments", etc. indicate that the described features, structures, materials, or characteristics are included in at least one embodiment of the application. The illustrative examples of the above terms are not necessarily mutually exclusive and are not necessarily mutually inclusive. Moreover, the described features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0135] The above merely provides preferred embodiments of the application, and is not intended to limit the application. The application can have various modifications and changes without departing from the spirit and principles thereof. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A relay characterized by comprising: The relay comprises: a housing; an inner component movably arranged in the housing and configured to switch a state of the relay from a closed state to an open state and from the open state to the closed state in response to an input signal; a coil assembly for driving the inner component to move; an igniter arranged in the housing and configured to generate a gas impact force for driving the inner component to move when the igniter is activated, so as to switch the relay from the closed state to the open state; a monitoring and control assembly electrically connected with the coil assembly and the igniter and configured to monitor a current value passing through the inner component and control the coil assembly to be powered off or the igniter to be activated according to a comparison result of the current value with a first threshold value and a second threshold value, the first threshold value being smaller than the second threshold value; wherein, when the current value is greater than or equal to the first threshold value and smaller than the second threshold value, the monitoring and control assembly controls the coil assembly to be powered off; and when the current value is greater than or equal to the second threshold value, the monitoring and control assembly activates the igniter. The monitoring and control assembly comprises a circuit board and a Hall sensor, the circuit board is located outside the housing and electrically connected with the coil assembly and the igniter respectively, and the Hall sensor is arranged on the circuit board and used for monitoring the current value passing through the inner component.

2. The relay according to claim 1, characterized in that The housing is provided with a static contact, the inner component has a movable contact piece used for contacting or separating from the static contact; when the relay is in the closed state, the movable contact piece contacts the static contact; and when the relay is in the open state, the movable contact piece separates from the static contact.

3. The relay according to claim 2, characterized in that The Hall sensor is configured to monitor the current value passing through the movable contact piece. The housing comprises an insulating cover having a top wall and a side wall connected with each other, the movable contact piece is movably arranged in a cavity surrounded by the top wall and the side wall, the top wall is provided with the static contact, and the circuit board is located on a peripheral side of the side wall.

4. The relay according to claim 3, characterized in that The relay further comprises a temperature monitoring assembly electrically connected with the monitoring and control assembly and used for monitoring a temperature of the housing.

5. The relay of claim 1, wherein The temperature monitoring assembly comprises a mounting member arranged on an outer wall surface of the housing and a temperature sensor arranged on the mounting member and electrically connected with the monitoring and control assembly and used for monitoring the temperature of the housing.

6. The relay of claim 5, wherein The housing is provided with a plurality of pairs of static contacts, each of the static contacts has a first projection on a normal projection of a target plane, and geometric centers of a plurality of the first projections are connected in a loop shape; 7. The relay according to claim 6, characterized in that the temperature sensor has a second projection on the normal projection of the target plane, and the second projection is located at a geometric center of the loop shape; wherein, the target plane is perpendicular to a moving direction of the inner component. The loop shape is a rectangle.

8. The relay according to claim 7, characterized in that The temperature monitoring assembly further comprises two conductive members, the mounting member covers a part of a peripheral side of the conductive members, one end of each of the conductive members is electrically connected with the monitoring and control assembly, and the other end is electrically connected with the temperature sensor.

9. The relay of claim 6, wherein ​ 10. A relay according to any one of claims 1-9, characterised in that The shell has a through hole penetrating the inner wall surface and the outer wall surface of the shell; The exciter is mounted on the outer wall surface of the shell and seals the through hole.

11. The relay of claim 10, wherein The exciter is mounted on the outer wall surface of the shell through an adapter.

12. The relay of claim 11, wherein, The adapter comprises an adapter sleeve and an adapter flange, one axial end of the adapter sleeve is connected with the outer wall surface of the shell, the adapter flange is connected with the other axial end of the adapter sleeve and protrudes from the outer circumferential surface of the adapter sleeve; The exciter comprises a body and a lap portion, the body is arranged in the adapter sleeve, the lap portion is connected with the outer circumferential surface of the body and lapped on the side surface of the adapter flange away from the shell.

13. The relay of claim 11, wherein, The adapter is made of plastic or wood.

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