Relay

Abstract

Provided in the present disclosure is a relay, comprising a housing, an internal component, a coil assembly, an exciter, and a monitoring and control assembly. In response to an input signal, the internal component is configured to switch the relay between a closed state and an open state. The coil assembly is used for driving the internal component to move. When the exciter is activated, the exciter is configured to generate a gas impact force, the gas impact force being used for driving the internal component to move, such that the relay is switched from the closed state to the open state. The monitoring and control assembly is electrically connected to the coil assembly and the exciter, and is configured to monitor the value of a current passing through the internal component and, on the basis of a comparison result between the value of the current and a first threshold value and a second threshold value, to control the coil assembly to be deenergized or to activate the exciter, the first threshold value being less than the second threshold value; when the value of the current is greater than or equal to the first threshold but less than the second threshold, the monitoring and control assembly controls the coil assembly to be deenergized; when the value of the current is greater than or equal to the second threshold, the monitoring and control assembly activates the exciter.

Description

relay

[0001] This disclosure claims priority to Chinese Patent Application No. 202411896897.0, filed on December 20, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of electrical control device technology, and more specifically, to a relay. Background Technology

[0003] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0004] When an abnormal overload such as overcurrent occurs in a energized circuit, the relay is required to disconnect the circuit, thereby cutting off the overload current and providing safety protection. When the load to be disconnected (high voltage, high current) is very large, an electric arc will be generated in the relay contacts, resulting in a violent arc between the contacts, which is not conducive to achieving disconnection. Summary of the Invention

[0005] This disclosure provides a relay that can disconnect the relay in different ways depending on the current value, solving the problem in related technologies where arcing makes disconnection difficult.

[0006] The relay of this disclosure embodiment includes:

[0007] case;

[0008] Internal components are movably disposed within the housing and 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;

[0009] Coil assembly for driving the movement of the internal components;

[0010] An exciter, mounted in the housing, and configured to generate a gas impingement force when activated, the gas impingement force driving the internal components to move, thereby switching the relay from the closed state to the open state; and

[0011] A monitoring and control component, electrically connected to the coil assembly and the exciter, is configured to monitor the current value passing through the internal components and, based on a comparison of the current value with a first threshold and a second threshold, control the coil assembly to be de-energized or the exciter to be activated; the first threshold is less than the second threshold and greater than the normal current value;

[0012] Specifically, when the current value is greater than or equal to the first threshold and less than the second threshold, the monitoring and control component controls the coil assembly to be de-energized; when the current value is greater than or equal to the second threshold, the monitoring and control component activates the exciter.

[0013] According to some embodiments of this disclosure, the monitoring and control component includes a circuit board and a Hall sensor. The circuit board is located outside the housing and is electrically connected to the coil assembly and the exciter, respectively. The Hall sensor is mounted on the circuit board and is used to monitor the current value passing through the internal components.

[0014] According to some embodiments of this disclosure, the housing is provided with a stationary contact, and the internal component has a movable contact piece, which is used to contact or separate from the stationary contact; wherein, when the relay is in a closed state, the movable contact piece contacts the stationary contact; when the relay is in an open state, the movable contact piece separates from the stationary contact.

[0015] The Hall sensor is configured to monitor the current value passing through the moving contact.

[0016] According to some embodiments of this disclosure, the housing includes an insulating cover having a connected top wall and a side wall, the movable contact being movably disposed within a cavity enclosed by the top wall and the side wall, the stationary contact being provided on the top wall, and the circuit board being located on the outer periphery of the side wall.

[0017] According to some embodiments of this disclosure, the relay further includes a temperature monitoring component electrically connected to the monitoring and control component for monitoring the temperature of the housing.

[0018] According to some embodiments of this disclosure, the temperature monitoring component includes a mounting component and a temperature sensor. The mounting component is installed on the outer wall surface of the housing, and the temperature sensor is disposed on the mounting component and electrically connected to the monitoring and control component for monitoring the temperature of the housing.

[0019] According to some embodiments of this disclosure, the housing is provided with multiple pairs of stationary contacts, and the orthographic projection of each stationary contact on a target plane is a first projection. The geometric centers of multiple first projections are connected end to end to form a ring.

[0020] The orthographic projection of the temperature sensor onto the target plane is a second projection, and the second projection is located at the geometric center of the ring.

[0021] The target plane is perpendicular to the direction of movement of the internal component.

[0022] According to some embodiments of this disclosure, the ring is rectangular.

[0023] According to some embodiments of this disclosure, the temperature monitoring component further includes two conductive elements, and the mounting element covers a portion of the outer periphery of the conductive elements; one end of the two conductive elements is electrically connected to the monitoring and control component, and the other end is electrically connected to the temperature sensor.

[0024] According to some embodiments of this disclosure, the housing has a through hole that penetrates the inner wall surface and the outer wall surface of the housing;

[0025] The exciter is mounted on the outer wall of the housing and seals the through hole.

[0026] According to some embodiments of this disclosure, the exciter is mounted on the outer wall of the housing via an adapter.

[0027] According to some embodiments of this disclosure, the adapter includes 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.

[0028] The exciter includes a body and an overlapping part. The body is inserted into the adapter sleeve, and the overlapping part is connected to the outer peripheral side of the body and overlaps the side surface of the adapter flange facing away from the housing.

[0029] According to some embodiments of this disclosure, the adapter is made of plastic or wood.

[0030] An embodiment of the above application has at least the following advantages or beneficial effects:

[0031] The relay in this embodiment employs different disconnection methods based on the magnitude of the current value passing through the internal components and the comparison results of this current value with a first threshold and a second threshold. Specifically, when the current value is greater than or equal to the first threshold and less than the second threshold, the coil assembly is de-energized; when the current value is greater than the second threshold, the exciter is activated to force disconnection, thus achieving "tiered" disconnection. On the one hand, when the current value is greater than or equal to the first threshold, i.e., slightly greater than the normal current value, the coil assembly is de-energized in a timely manner to achieve disconnection, preventing the contact head from melting and sticking due to untimely disconnection, thus making it impossible to disconnect by de-energizing the coil assembly. On the other hand, the exciter's forced disconnection serves as a final safety guarantee, avoiding the problem of violent arcing of the contact head or even relay explosion caused by the inability to disconnect in time due to short-circuit current. Furthermore, when the current value passing through the internal components is only slightly greater than the normal current value, it is only necessary to de-energize the coil assembly to complete the disconnection, without the need for the exciter to force disconnection, so the relay can continue to be used and is not completely scrapped. Attached Figure Description

[0032] Figure 1 shows an exploded view of a relay according to an embodiment of the present disclosure.

[0033] Figure 2 shows a cross-sectional view of a relay according to an embodiment of the present disclosure.

[0034] Figure 3 shows a perspective view of a relay according to another embodiment of the present disclosure.

[0035] Figure 4 shows an exploded view of a relay according to another embodiment of the present disclosure.

[0036] Figure 5 shows a schematic diagram of the relative positions of the monitoring and control components, stationary contact, and moving contact of a relay according to another embodiment of the present disclosure.

[0037] Figure 6 shows a three-dimensional schematic diagram of the temperature monitoring component.

[0038] Figure 7 shows a schematic diagram of the positions of the first projection and the second projection.

[0039] Figure 8 shows an exploded view of the internal components.

[0040] The reference numerals in the attached drawings are explained as follows: 100. Housing; 101. Through hole; 102. Extension; 103. Gas storage chamber; 110. Insulating cover; 111. Top wall; 112. Side wall; 120. Frame plate; 130. Yoke plate; 140. Metal cover; 200. Stationary contact; 300. Internal component; 310. Push rod component; 311. Slot; 3111. Slot; 320. Pressure-bearing component; 321. Base; 322. Side; 323. Connecting part; 3231. Locking block; 324. 330. Protrusion; 340. Movable contact; 500. Elastic element; 510. Exciter; 520. Body; 600. Connector; 610. Connector sleeve; 620. Connector flange; 700. Coil assembly; 710. Coil frame; 720. Coil; 800. Monitoring and control assembly; 810. Circuit board; 820. Hall sensor; 900. Temperature monitoring assembly; 910. Mounting part; 920. Temperature sensor; 930. Conductive element. Detailed Implementation

[0041] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0042] It is understood that the terms "comprising" and "having," and any variations thereof, used in the embodiments of this disclosure, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to such processes, methods, products, or apparatus.

[0043] As shown in Figures 1 and 2, the relay of this embodiment includes a housing 100, an internal component 300, and an actuator 500. The internal component 300 is movably disposed within the housing 100 and 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 actuator 500 is mounted in the housing 100 and configured to be activated when a threshold current passes through the internal component 300, generating a gas impact force that drives the internal component 300 to move, thereby switching the relay from a closed state to an open state.

[0044] In this embodiment, when a threshold current passes through the internal component 300, the exciter 500 is activated, generating a gas impact force. This gas impact force drives the internal component 300 to move, causing the relay to switch from a closed state to an open state. Thus, the exciter 500 acts as a "fuse," promptly disconnecting the relay when the threshold current passes through the internal component 300. This improves the anti-sticking properties of the moving and stationary contacts, enabling rapid arc extinguishing.

[0045] In one embodiment, the igniter 500 may include gunpowder. When a threshold current passes through the internal component 300, the gunpowder is ignited and generates a large amount of gas, forming a gas impact force. This gas impact force can drive the internal component 300 to move, causing the relay to switch from a closed state to an open state.

[0046] For example, the exciter 500 can be an electric detonator or an electric detonating tube, but is not limited to this.

[0047] Please refer to Figures 1 and 2. The housing 100 is an airtight housing. This airtight construction helps prevent arcing between adjacent conductive elements in the relay and helps provide electrical isolation between the moving and stationary contacts.

[0048] The housing 100 may include 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.

[0049] In one embodiment, the insulating cover 110 is made of ceramic material and is connected to the yoke plate 130 via a frame plate 120. The frame plate 120 can be a ring-shaped metal part, such as an iron-nickel alloy. One end of the frame plate 120 is connected to the opening edge of the insulating cover 110, for example, by laser welding, brazing, resistance welding, or adhesive bonding. The other end of the frame plate 120 is connected to the yoke plate 130, also by laser welding, brazing, resistance welding, or adhesive bonding. The frame plate 120 is provided between the insulating cover 110 and the yoke plate 130 to facilitate the connection between them.

[0050] 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 internal component 300, and the side wall 112 is located around the periphery of the internal component 300. A stationary contact 200 is mounted on the top wall 111. When the relay is in the closed state, the internal component 300 is in contact with the stationary contact 200; when the relay is in the open state, the internal component 300 is separated from the stationary 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 a frame plate 120.

[0051] The sidewall 112 can be a rectangular ring structure, a circular ring structure, or a ring structure of other shapes, and this disclosure does not make any special limitation in this regard.

[0052] As shown in Figure 8, the internal component 300 includes a push rod member 310, a moving contact 330, and an elastic element 340. The moving contact 330 is mounted on the push rod member 310 and is used to contact or separate from the stationary contact 200. The elastic element 340 is used to provide contact pressure to the moving contact 330. Specifically, when the relay is in the closed state, the moving contact 330 is in contact with the stationary contact 200; when the relay is in the open state, the moving contact 330 is separated from the stationary contact 200.

[0053] When the relay is in the closed state, that is, when the moving contact 330 is in contact with the stationary contact 200, the monitoring and control component 800 can monitor the current value through the moving contact 330.

[0054] As shown in Figures 1 and 8, the relay also includes multiple pairs of stationary contacts 200. The internal component 300 includes multiple elastic elements 340 and multiple spaced-apart moving contacts 330. The moving contacts 330 are mounted on the push rod component 310 and are used to contact or separate from the multiple pairs of stationary contacts 200 respectively. The multiple elastic elements 340 correspond to the multiple moving contacts 330. Each moving contact 330 corresponds to a pair of stationary contacts 200. When the relay is in the closed state, the multiple moving contacts 330 are in contact with the multiple pairs of stationary contacts 200; when the relay is in the open state, the multiple moving contacts 330 are separated from the multiple pairs of stationary contacts 200.

[0055] In this embodiment of the present disclosure, multiple moving contacts 330 are mounted on the same push rod member 310, and each moving contact 330 corresponds to a pair of stationary contacts 200. When the push rod member 310 moves, multiple moving contacts 330 move simultaneously, thereby achieving the effect of "single-drive multiple-action", which is conducive to the miniaturization and integration of the relay size, and at the same time reduces the cost of the product to a certain extent.

[0056] As shown in Figures 3 to 5, the relay also includes a coil assembly 700 and a monitoring and control assembly 800. The coil assembly 700 is located on the side of the yoke plate 130 facing away from the stationary contact 200, and includes a coil frame 710 and a coil 720. The coil frame 710 is fitted around the outer periphery of the metal cover 140, and the coil 720 is wound around the coil frame 710. By controlling the energization or de-energization of the coil 720, the internal component 300 can be driven to move.

[0057] The monitoring and control component 800 is electrically connected to the coil 720 and the exciter 500 of the coil assembly 700, and is configured to monitor the current value passing through the internal component 300, and control the coil assembly 700 to de-energize or activate the exciter 500 based on the comparison result of the current value with a first threshold and a second threshold; the first threshold is less than the second threshold; wherein, when the current value is greater than or equal to the first threshold and less than the second threshold, the monitoring and control component 800 controls the coil assembly 700 to de-energize; when the current value is greater than or equal to the second threshold, the monitoring and control component 800 activates the exciter 500.

[0058] During operation, the monitoring and control component 800 can monitor the current value passing through the internal component 300, compare the current value with a first threshold and a second threshold, and determine the appropriate action to take based on the comparison result.

[0059] For example, if the current value obtained by the monitoring and control component 800 is less than the first threshold, it indicates that the current value through the internal component 300 is at the normal current value (i.e., the current value of the relay in normal working condition), and there is no need to disconnect the relay. If the current value obtained by the monitoring and control component 800 is greater than or equal to the first threshold and less than the second threshold, it indicates that the current value through the internal component 300 is slightly higher than the normal current value, and disconnection can be completed by de-energizing the control coil component 700. If the current value obtained by the monitoring and control component 800 is greater than the second threshold, it indicates that the current value through the internal component 300 is much higher than the normal current value, and disconnection by de-energizing the coil component 700 may not be possible. Therefore, by activating the exciter 500 to generate a gas impact force, the internal component 300 is forcibly moved using the gas impact force, thereby switching the relay from the closed state to the open state, achieving the purpose of disconnection.

[0060] Therefore, the relay in this embodiment employs different disconnection methods based on the magnitude of the current value passing through the internal component 300 and the comparison results of this current value with a first threshold and a second threshold. Specifically, when the current value is greater than or equal to the first threshold and less than the second threshold, the coil assembly 700 is de-energized; when the current value is greater than the second threshold, the exciter 500 is activated to force disconnection, thus achieving "tiered" disconnection. On one hand, when the current value is slightly greater than the normal current value, timely de-energization of the coil assembly 700 is implemented to achieve disconnection, preventing the contact head from melting and sticking due to delayed disconnection, thus preventing disconnection through the coil 720 de-energization method. On the other hand, the forced disconnection by the exciter 500 serves as a final safety guarantee, avoiding the problem of violent arcing of the contact head or even relay explosion caused by the inability to disconnect in time due to short-circuit current. Furthermore, when the current value passing through the internal component 300 is only slightly greater than the normal current value, only de-energization of the coil assembly is needed to complete the disconnection, without the need for forced disconnection by the exciter 500, allowing the relay to continue to be used and preventing complete failure.

[0061] The monitoring and 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 to the coil assembly 700 and the exciter 500, respectively. The Hall sensor 820 is mounted on the circuit board 810 and is used to monitor the current value through the moving contact 330 of the internal component 300.

[0062] It should be noted that when current flows through the moving contact 330, a magnetic field is generated around it according to Ampere's law. The Hall sensor 820, located on the outer periphery of the housing 100, near the moving contact 330, senses this magnetic field and generates a Hall voltage. The magnitude of this Hall voltage is proportional to the current intensity passing through the moving contact 330. Therefore, by measuring the magnitude of the Hall voltage, the current value passing through the moving contact 330 can be indirectly obtained.

[0063] In one embodiment, the circuit board 810 is located on the outer periphery of the sidewall 112 of the insulating cover 110.

[0064] As shown in Figures 3 and 4, the relay also includes a temperature monitoring component 900, which is electrically connected to the monitoring and control component 800 and is used to monitor the temperature of the housing 100. By monitoring the temperature of the housing 100 in real time through the temperature monitoring component 900, the monitoring and control component 800 can promptly obtain information about the heat generated by the relay during operation, thereby predicting abnormal operating conditions in advance.

[0065] As shown in Figure 6, the temperature monitoring component 900 includes a mounting component 910 and a temperature sensor 920. The mounting component 910 is installed on the outer wall of the housing 100, and the temperature sensor 920 is located on the mounting component 910 and is electrically connected to the monitoring and control component 800 for monitoring the temperature of the housing 100.

[0066] In one 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.

[0067] The temperature monitoring component 900 also includes two conductive elements 930, with a mounting element 910 covering a portion of the outer periphery of the conductive elements 930. One end of each conductive element 930 is electrically connected to the monitoring and control component 800, and the other end is electrically connected to the temperature sensor 920.

[0068] As an example, the mounting element 910 is made of an insulating material, such as plastic. When the mounting element 910 is made of plastic, the mounting element 910 and the conductive element 930 can be integrally injection molded.

[0069] As shown in Figures 3 and 7, 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.

[0070] In this embodiment of the disclosure, the temperature sensor 920 is located at the center of the plurality 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.

[0071] 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.

[0072] 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.

[0073] In one embodiment, the ring is rectangular, but this is not a limitation.

[0074] As shown in Figure 2, the housing 100 has a through hole 101 that 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.

[0075] 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.

[0076] 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.

[0077] As shown in Figure 2, at least a portion of the exciter 500 is located within the through hole 101. When the exciter 500 is activated to generate a gas impact force, since at least a portion of the exciter 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 the closed state to the open state quickly, thus improving the breaking efficiency.

[0078] As shown in Figure 2, the exciter 500 is mounted on the outer wall of the top wall 111 of the insulating cover 110 via the adapter 600.

[0079] In this embodiment of the present disclosure, the exciter 500 is connected to the insulating cover 110 via the adapter 600 but is not directly connected to the insulating cover 110, which can prevent the heat generated when the relay is working from being transferred to the exciter 500 and causing the exciter 500 to be falsely triggered.

[0080] The adapter 600 can be made of a material with poor thermal conductivity, such as plastic or wood, which can further prevent the heat from the insulating cover 110 from being transferred to the exciter 500.

[0081] In one embodiment, the adapter 600 includes an adapter sleeve 610 and an adapter flange 620. One axial end of the adapter sleeve 610 is connected to the outer wall surface of the housing 100, and the adapter flange 620 is connected to the other axial end of the adapter sleeve 610 and protrudes from the outer peripheral side surface of the adapter sleeve 610. The actuator 500 includes a body 510 and an overlapping portion 520. The body 510 passes through the adapter sleeve 610, and the overlapping portion 520 is connected to the outer peripheral side surface of the body 510 and overlaps the side surface of the adapter flange 620 facing away from the housing 100. The body 510 contains gunpowder.

[0082] In another embodiment, the adapter 600 may also include only an adapter sleeve 610, one axial end of which is connected to the top wall 111 of the insulating cover 110, and the other end is connected to the exciter 500.

[0083] In another embodiment, a transition flange 620 is provided at each of the two axial ends of the adapter sleeve 610, one of the transition flanges 620 is connected to the top wall 111 of the insulating cover 110, and the other transition flange 620 is connected to the exciter 500.

[0084] It is understood that the adapter 600 and the insulating cover 110, as well as the adapter 600 and the exciter 500, can be connected by welding, gluing, or other methods, and this disclosure does not impose any particular limitation on this.

[0085] As shown in Figures 2 and 8, the inner wall surface of the top wall 111 of the insulating cover 110 is provided with an extension 102, and the through hole 101 passes through the extension 102. The internal component 300 also includes a pressure-receiving member 320, which is connected to one end of the push rod member 310 near the through hole 101. The pressure-receiving member 320 is configured to be driven by the gas impact force to move the push rod member 310 when the exciter 500 is activated and generates a gas impact force. When the relay is in the closed state, the pressure-receiving member 320, the extension 102, and the exciter 500 form a gas storage chamber 103.

[0086] In this embodiment of the present disclosure, the internal component 300 also includes a pressure-receiving component 320. When the relay is in the closed state, the pressure-receiving component 320, the extension 102 and the exciter 500 form a gas storage chamber 103. The gas generated after the exciter 500 is activated first gathers in the gas storage chamber 103. Compared with the volume of the insulating cover 110, the volume of the gas storage chamber 103 is smaller, which is more conducive to the gas forming a larger impact force, thereby enabling the relay to quickly switch to the open state.

[0087] As shown in Figure 8, the pressure-bearing member 320 includes a base 321, a side portion 322, and a connecting portion 323. The side portion 322 is connected to the edge of the base 321 and extends from the base 321 toward the vicinity of the actuator 500; the connecting portion 323 is connected to the base 321 and / or the side portion 322 and is connected to 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 portion 322 covers the outer periphery of the extension 102.

[0088] In this embodiment of the present disclosure, the side portion 322 is connected to the edge of the base portion 321 and extends from the base portion 321 toward the direction close to the exciter 500. The side portion 322 and the base portion 321 are roughly in a "bowl" shape. When the relay is in the closed state, the base portion 321 covers the through hole 101, and the side portion 322 covers the outer periphery of the extension portion 102. This is beneficial for the pressure-bearing member 320 to cover the through hole 101, thereby making the gas storage chamber 103 form a relatively sealed space, which is more conducive to the gas generated by the exciter 500 forming a larger impact force.

[0089] The pressure-bearing component 320 also includes a protrusion 324, which protrudes from the surface of the base 321 facing the extension 102; when the relay is in the closed state, the protrusion 324 extends into the through hole 101. The protrusion 324 extending into the through hole 101 can further compress the space of the gas storage chamber 103, which is beneficial to achieving the effect of accumulating gas in a smaller space to generate a larger impact force.

[0090] 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 one embodiment, the slot wall of the slot 311 has a groove 3111, and the connecting part 323 has a locking block 3231 for engaging into the groove 3111.

[0091] In summary, the relays of the present disclosure embodiments have at least the following advantages and beneficial effects:

[0092] The relay in this embodiment employs different disconnection methods based on the magnitude of the current value passing through the internal component 300 and the comparison results of this current value with a first threshold and a second threshold. Specifically, when the current value is greater than or equal to the first threshold and less than the second threshold, the coil assembly 700 is de-energized; when the current value is greater than the second threshold, the exciter 500 is activated to force disconnection, thus achieving "tiered" disconnection. On the one hand, when the current value is slightly greater than the normal current value, the coil assembly 700 is de-energized in a timely manner to achieve disconnection, preventing the contact head from melting and sticking due to untimely disconnection, thus preventing disconnection through the coil 720 de-energization method. On the other hand, the exciter 500's forced disconnection serves as a final safety guarantee, avoiding the problem of violent arcing of the contact head or even relay explosion caused by the inability to disconnect in time due to short-circuit current. Furthermore, when the current value passing through the internal component 300 is only slightly greater than the normal current value, it is only necessary to de-energize the coil assembly to complete the disconnection, without the need for the exciter 500 to force disconnection, so the relay can continue to be used and is not completely scrapped.

[0093] It is understood that the various embodiments / implementations provided in this disclosure can be combined with each other without creating contradictions, and will not be described in detail here.

[0094] In the disclosed embodiments, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the disclosed embodiments according to the specific circumstances.

[0095] In the description of the disclosed embodiments, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the disclosed embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the disclosed embodiments.

[0096] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the disclosed embodiments. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0097] The above are merely preferred embodiments of the disclosed embodiments and are not intended to limit the disclosed embodiments. For those skilled in the art, the disclosed embodiments can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the disclosed embodiments should be included within the protection scope of the disclosed embodiments.

Claims

1. A relay, characterized in that, include: case; Internal components are movably disposed within the housing and 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; Coil assembly for driving the movement of the internal components; An exciter, mounted in the housing, is configured to generate a gas impact force when the exciter is activated, the gas impact force being used to drive the internal components to move, thereby switching the relay from the closed state to the open state; as well as A monitoring and control component, electrically connected to the coil assembly and the exciter, is configured to monitor the current value passing through the internal components and, based on a comparison of the current value with a first threshold and a second threshold, control the coil assembly to be de-energized or the exciter to be activated; the first threshold is less than the second threshold and greater than the normal current value; Specifically, when the current value is greater than or equal to the first threshold and less than the second threshold, the monitoring and control component controls the coil assembly to be de-energized; when the current value is greater than or equal to the second threshold, the monitoring and control component activates the exciter.

2. The relay according to claim 1, characterized in that, The monitoring and control component includes a circuit board and a Hall sensor. The circuit board is located outside the housing and is electrically connected to the coil assembly and the exciter, respectively. The Hall sensor is mounted on the circuit board and is used to monitor the current value passing through the internal components.

3. The relay according to claim 2, characterized in that, The housing is provided with a stationary contact, and the internal component has a movable contact piece, which is used to contact or separate from the stationary contact; wherein, when the relay is in the closed state, the movable contact piece is in contact with the stationary contact; when the relay is in the open state, the movable contact piece is separated from the stationary contact. The Hall sensor is configured to monitor the current value passing through the moving contact.

4. The relay according to claim 3, characterized in that, The housing includes an insulating cover having a connected top wall and a side wall. The movable contact is movably disposed within the cavity formed by the top wall and the side wall. The stationary contact is provided on the top wall. The circuit board is located on the outer periphery of the side wall.

5. The relay according to claim 1, characterized in that, The relay also includes a temperature monitoring component, which is electrically connected to the monitoring and control component and is used to monitor the temperature of the housing.

6. The relay according to claim 5, characterized in that, The temperature monitoring component includes a mounting component and a temperature sensor. The mounting component is installed on the outer wall surface of the housing, and the temperature sensor is located on the mounting component and electrically connected to the monitoring and control component for monitoring the temperature of the housing.

7. The relay according to claim 6, characterized in that, The housing is provided with multiple pairs of stationary contacts. The orthographic projection of each stationary contact on a target plane is a first projection. The geometric centers of multiple first projections are connected end to end to form a ring. The orthographic projection of the temperature sensor onto the target plane is a second projection, and the second projection is located at the geometric center of the ring. The target plane is perpendicular to the direction of movement of the internal component.

8. The relay according to claim 7, characterized in that, The ring is rectangular.

9. The relay according to claim 6, characterized in that, The temperature monitoring component also includes two conductive elements, and the mounting component covers a portion of the outer periphery of the conductive elements; one end of the two conductive elements is electrically connected to the monitoring and control component, and the other end is electrically connected to the temperature sensor.

10. The relay according to any one of claims 1-9, characterized in that, The housing has a through hole that penetrates both the inner and outer walls of the housing. The exciter is mounted on the outer wall of the housing and seals the through hole.

11. The relay according to claim 10, characterized in that, The exciter is mounted on the outer wall of the housing via an adapter.

12. The relay according to claim 11, characterized in that, The adapter includes 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 of the adapter sleeve. The exciter includes a body and an overlapping part. The body is inserted into the adapter sleeve, and the overlapping part is connected to the outer peripheral side of the body and overlaps the side surface of the adapter flange facing away from the housing.

13. The relay according to claim 11, characterized in that, The adapter is made of plastic or wood.

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