Load switch and intelligent electric energy meter

Abstract

The utility model discloses a load switch and an intelligent electric energy meter. The load switch comprises a control module, a driving module and an action module. The action module comprises a main contact unit and an auxiliary contact unit, and the main contact unit and the auxiliary contact unit form a parallel structure; one end of the driving module is electrically connected with the control module, and the other end of the driving module is fixedly connected with the main contact unit and the auxiliary contact unit. Both the main contact unit and the auxiliary contact unit can be switched on or switched off, so that the load switch is switched on or switched off, the main contact unit is switched on later than the auxiliary contact unit, and the main contact unit is switched off earlier than the auxiliary contact unit. According to the load switch, the main contact unit bears an electrical load, and the auxiliary contact unit bears arc discharge, so that an arc extinguishing function is achieved, the main contact unit is effectively prevented from being influenced by an arc discharge phenomenon, the phenomena of oxidation, carbonization and the like of the main contact unit are reduced, the stability of the main contact unit is improved, and the service life of the load switch is prolonged. And the service life of the main contact unit is prolonged.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of load switches for intelligent electricity meters, and in particular, to a load switch and an intelligent electricity meter. Background Art

[0002] In fields such as instruments and meters, to achieve automatic control, a load switch is an essential link, and load switches have also been widely used. With the increasing demand for electricity, the requirements for the on-off ability of the load switch in intelligent electricity meters have also increased accordingly.

[0003] However, obvious arcing discharge phenomena occur during the closing and opening processes of the load switch, which will accelerate the oxidation, carbonization, and burning of the contacts in the load switch, resulting in an increase in the contact resistance of the load switch, generating heat, poor contact, or adhesion phenomena, and also having a greater impact on the impedance and service life of the contacts in the load switch. At the same time, the carbon oxides splashed by the arc form powder accumulation inside the load switch. After a certain accumulation, a powder resistance will be formed, resulting in the failure of the load switch. Furthermore, it will cause the failure of the closing and opening processes of the load switch, or a large temperature rise will occur after the impedance in the load switch increases, greatly increasing the degree of electricity consumption risk. Therefore, how to effectively and accurately protect the contacts in the design and use of the load switch is crucial for the load switch. Summary of the Utility Model

[0004] The embodiments of the present utility model provide a load switch and an intelligent electricity meter, which reasonably set the on and off times of an additional auxiliary contact unit, effectively avoid the influence of the arcing discharge phenomenon on the main contact unit, improve the stability and service life of the main contact unit, and can also omit corresponding complex arc extinguishing circuits or devices, etc.

[0005] In a first aspect, the embodiments of the present utility model provide a load switch, including a control module, a drive module, and an action module;

[0006] The action module includes a main contact unit and an auxiliary contact unit, and the main contact unit and the auxiliary contact unit form a parallel structure;

[0007] One end of the drive module is electrically connected to the control module, and the other end of the drive module is fixedly connected to the main contact unit and the auxiliary contact unit respectively;

[0008] Both the main contact unit and the auxiliary contact unit can be turned on or off to turn on or off the load switch, and the main contact unit turns on later than the auxiliary contact unit, and the main contact unit turns off earlier than the auxiliary contact unit.

[0009] Optionally, the main contact unit includes a first moving contact and a first stationary contact which are arranged at relative positions; the auxiliary contact unit includes a second moving contact and a second stationary contact which are arranged at relative positions;

[0010] The other ends of the driving module are fixedly connected to the first moving contact and the second moving contact respectively;

[0011] The first moving contact and the first stationary contact can be closed or separated to make the main contact unit conduct or disconnect, and the second moving contact and the second stationary contact can be closed or separated to make the auxiliary contact unit conduct or disconnect. Moreover, the closing of the first moving contact and the first stationary contact is later than that of the second moving contact and the second stationary contact, and the separation of the first moving contact and the first stationary contact is earlier than that of the second moving contact and the second stationary contact.

[0012] Optionally, in the open state of the load switch, in a first direction, the distance between the first moving contact and the first stationary contact is greater than the distance between the second moving contact and the second stationary contact; wherein, the first direction is the moving direction for the first moving contact and the first stationary contact to close, and the first direction is also the moving direction for the second moving contact and the second stationary contact to close.

[0013] Optionally, the actuating module further includes a moving spring piece;

[0014] Both the first moving contact and the second moving contact are fixedly arranged on the moving spring piece;

[0015] The other end of the driving module is fixedly connected to the moving spring piece.

[0016] Optionally, the load switch further includes a first lead-out piece and a second lead-out piece;

[0017] The first lead-out piece is fixedly connected to the moving spring piece;

[0018] The second lead-out piece is fixedly connected to the first stationary contact and the second stationary contact respectively.

[0019] Optionally, the load switch further includes a housing;

[0020] Both the first stationary contact and the second stationary contact are fixedly arranged on the inner wall of the housing, and both the first moving contact and the second moving contact are fixedly arranged on the same side surface of the moving spring piece close to the first stationary contact and the second stationary contact.

[0021] Optionally, the driving module includes an electromagnetic driving unit and a push rod unit;

[0022] One end of the electromagnetic drive unit is electrically connected to the control module, and the other end of the electromagnetic drive unit is fixedly connected to one end of the push rod unit. The other end of the push rod unit is fixedly connected to the main contact unit and the auxiliary contact unit respectively.

[0023] Optionally, the electromagnetic drive unit includes a drive coil and an armature;

[0024] One end of the drive coil is electrically connected to the control module. The magnetic field generated by the drive coil drives the armature to move, and one end of the armature is fixedly connected to one end of the push rod unit.

[0025] Optionally, the drive module further includes a magnetic shield;

[0026] The electromagnetic drive unit is placed inside the magnetic shield.

[0027] In a second aspect, an embodiment of the present invention further provides an intelligent electricity meter, including the load switch according to any one of the first aspect.

[0028] An embodiment of the present invention provides a load switch and an intelligent electricity meter. The load switch includes a control module, a drive module, and an action module. The action module includes a main contact unit and an auxiliary contact unit, and the main contact unit and the auxiliary contact unit form a parallel structure. One end of the drive module is electrically connected to the control module, and the other end of the drive module is fixedly connected to the main contact unit and the auxiliary contact unit respectively. Both the main contact unit and the auxiliary contact unit can be turned on or off to turn on or off the load switch. The main contact unit is turned on later than the auxiliary contact unit and is turned off earlier than the auxiliary contact unit. The load switch can use the on or off of the main contact unit to turn on or off itself. By reasonably setting the on and off times of the additional auxiliary contact unit, it can be realized that the main contact unit bears the electrical load and the auxiliary contact unit bears the arc discharge. While achieving the arc extinguishing function, it also effectively avoids the influence of the main contact unit being affected by the arc discharge phenomenon, reduces the phenomena such as oxidation and carbonization of the main contact unit, improves the stability of the main contact unit, extends the service life of the main contact unit, changes the phenomenon that the main contact unit alone bears the arc discharge when conducting or disconnecting, and can also omit the corresponding complex arc extinguishing circuits or devices, etc., reducing the process requirements of the corresponding arc extinguishing measures, so as to facilitate the design of a load switch with a small occupied space, low cost, and reliable operation. Description of the Drawings

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0030] Figure 1 is a schematic structural diagram of a load switch provided by an embodiment of the present invention;

[0031] Figure 2 is Figure 1 a schematic diagram of the working principle of the main contact unit and the auxiliary contact unit in the load switch shown;

[0032] Figure 3 and Figure 4 are schematic structural diagrams of two other load switches provided by an embodiment of the present invention;

[0033] Figure 5 is Figure 1 a schematic diagram of the contact distance in the open state of the load switch shown. Specific Embodiments

[0034] The following will further elaborate on the present invention in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of convenience of description, only the parts related to the present invention rather than all the structures are shown in the accompanying drawings.

[0035] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. It should be noted that the orientation terms such as "upper", "lower", "left", and "right" described in the embodiments of the present invention are described from the perspective shown in the accompanying drawings and should not be construed as a limitation to the embodiments of the present invention. In addition, in the context, it should also be understood that when it is mentioned that an element is formed "on" or "under" another element, it can not only be directly formed "on" or "under" another element, but also be indirectly formed "on" or "under" another element through an intermediate element. The terms "first", "second", etc. are only for descriptive purposes and do not represent any order, quantity, or importance, but are only used to distinguish different components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The term "including" and its variants used in the present invention are open-ended, that is, "including but not limited to". The term "based on" is "at least partially based on". The term "an embodiment" means "at least one embodiment".

[0037] It should be noted that concepts such as "first" and "second" mentioned in the present utility model are only used to distinguish corresponding contents, and are not used to limit the order or interdependent relationship.

[0038] It should be noted that the modifications of "one" and "multiple" mentioned in the present utility model are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly specified in the context, it should be understood as "one or more".

[0039] Figure 1 is a schematic structural diagram of a load switch provided by an embodiment of the present utility model, Figure 2 is Figure 1 a schematic diagram of the working principle of the main contact unit and the auxiliary contact unit in the shown load switch, Figure 3 and Figure 4 are schematic structural diagrams of another two load switches provided by an embodiment of the present utility model. As Figures 1-4 shown, the load switch includes a control module ( Figures 1-4 not shown in the figure), a driving module 10, and an operating module 20; the operating module 20 includes a main contact unit 21 and an auxiliary contact unit 22, and the main contact unit 21 and the auxiliary contact unit 22 form a parallel structure; one end of the driving module 10 is electrically connected to the control module, and the other end of the driving module 10 is fixedly connected to the main contact unit 21 and the auxiliary contact unit 22 respectively; both the main contact unit 21 and the auxiliary contact unit 22 can be turned on or off to turn on or off the load switch, and the main contact unit 21 is turned on later than the auxiliary contact unit 22, and the main contact unit 21 is turned off earlier than the auxiliary contact unit 22.

[0040] Specifically, the load switch includes a control module, a driving module 10, and an actuating module 20. Among them, one end of the driving module 10 is electrically connected to the control module, and the other end of the driving module 10 is fixedly connected to the actuating module 20. In this way, the driving module 10 can receive the control signal issued by the control module and drive the actuating module 20 to act under the action of the control signal to realize the conduction or disconnection of the load switch. The actuating module 20 includes a main contact unit 21 and an auxiliary contact unit 22, and the main contact unit 21 and the auxiliary contact unit 22 form a parallel structure. Here, it can be understood that the main contact unit 21 includes a first end and a second end, the first end and the second end can be conducted or disconnected, the auxiliary contact unit 22 includes a third end and a fourth end, the third end and the fourth end can be conducted or disconnected, and the first end of the main contact unit 21 is electrically connected to the third end of the auxiliary contact unit 22, and the second end of the main contact unit 21 is electrically connected to the fourth end of the auxiliary contact unit 22. Then, the main contact unit 21 and the auxiliary contact unit 22 can be understood as a parallel structure. Exemplarily, in a specific embodiment, when both the main contact unit 21 and the auxiliary contact unit 22 are conducted, the main contact unit 21 and the auxiliary contact unit 22 are in a parallel relationship.

[0041] In addition, the other end of the driving module 10 can be fixedly connected to the main contact unit 21 and the auxiliary contact unit 22 respectively. Both the main contact unit 21 and the auxiliary contact unit 22 can be conducted or disconnected to make the load switch conduct or disconnect. That is to say, the driving module 10 can drive simultaneously to control the on-off actions of the main contact unit 21 and the auxiliary contact unit 22, as well as the closing and opening actions of the corresponding load switch, effectively improving the action reliability and stability of the load switch. In order to effectively avoid the influence of the main contact unit 21 being affected by the arc discharge phenomenon and reduce the phenomena such as oxidation and carbonization of the main contact unit 21, an additional auxiliary contact unit 22 is provided in this embodiment. However, under the driving action of the driving module 10, the on-off action times of the main contact unit 21 and the auxiliary contact unit 22 are different, and there is an effect of acting before and after respectively. It can be understood that Figure 2Taking the schematic diagram of the working principle shown as an example, when the auxiliary contact unit 22 conducts first, the arc discharge formed during the conduction process of the auxiliary contact unit 22 will not affect the main contact unit 21. After that, when the arc discharge phenomenon decreases or disappears, the main contact unit 21 conducts again, and the main contact unit 21 can work normally, enabling the load switch to conduct and work normally. Even if the auxiliary contact unit 22 is damaged due to the influence of arc discharge, the load switch can still work normally when the main contact unit 21 conducts. Also, when the main contact unit 21 disconnects first, since the auxiliary contact unit 22 still conducts, no arc discharge phenomenon will occur at the main contact unit 21. After that, when the auxiliary contact unit 22 disconnects, the arc discharge formed during the disconnection process of the auxiliary contact unit 22 will not affect the main contact unit 21 either. The load switch disconnects and can also conduct normally next time, effectively protecting the main contact unit 21. In this way, it is realized that the main contact unit 21 bears the electrical load and the auxiliary contact unit 22 bears the arc discharge.

[0042] In other words, in a specific embodiment, Figures 1-3 to Figure 4 The sequence can be understood as the closing process of the load switch. Among them, Figure 1 can be understood as the load switch being in the off state, at this time both the main contact unit 21 and the auxiliary contact unit 22 are in the off state. Figure 3 can be understood as the intermediate process of the load switch changing from the off state to the on state. At this time, the auxiliary contact unit 22 conducts first, and the auxiliary contact unit 22 can bear the arc discharge. The main contact unit 21 has not conducted yet, and the main contact unit 21 will not be affected by the arc discharge. After that, when the arc discharge phenomenon decreases or disappears, the main contact unit 21 conducts again. Figure 4 can be understood as the load switch being in the on state, at this time both the main contact unit 21 and the auxiliary contact unit 22 are in the on state, and the main contact unit 21 can mainly bear the electrical load. That is to say, the main contact unit 21 conducts later than the auxiliary contact unit 22. The non-simultaneous conduction of the main contact unit 21 and the auxiliary contact unit 22 can effectively avoid the problems that the main contact unit 21 bears the arc discharge and is oxidized and carbonized due to the influence of the arc discharge, and realizes the arc extinguishing effect to a certain extent.

[0043] Similarly, in another specific embodiment, Figures 4-3 to Figure 1 can be understood as the opening process of the load switch. Among them, Figure 4 can be understood as the load switch being in the on state, at this time both the main contact unit 21 and the auxiliary contact unit 22 are in the on state. Figure 3It can be understood as the intermediate process of the load switch changing from the conducting state to the off state. At this time, the main contact unit 21 disconnects first, and the electrical load can be fully transferred to the auxiliary contact unit 22. And before the auxiliary contact unit 22 disconnects, the main contact unit 21 will not be affected by arc discharge. After that, after the arc discharge phenomenon decreases or disappears, the auxiliary contact unit 22 disconnects. Figure 1 It can be understood that the load switch is in the off state. At this time, both the main contact unit 21 and the auxiliary contact unit 22 are in the off state, and the auxiliary contact unit 22 mainly bears the arc discharge. That is, the main contact unit 21 disconnects earlier than the auxiliary contact unit 22. The non-simultaneous disconnection of the main contact unit 21 and the auxiliary contact unit 22 can effectively avoid the problems that the main contact unit 21 bears the arc discharge and is oxidized and carbonized due to the influence of the arc discharge, and to a certain extent, the arc extinguishing effect is achieved.

[0044] In the technical solution of the embodiment of the present utility model, the load switch includes a control module, a drive module and an action module; the action module includes a main contact unit and an auxiliary contact unit, and the main contact unit and the auxiliary contact unit form a parallel structure; one end of the drive module is electrically connected to the control module, and the other end of the drive module is fixedly connected to the main contact unit and the auxiliary contact unit respectively; both the main contact unit and the auxiliary contact unit can be conducted or disconnected to make the load switch conducted or disconnected, and the main contact unit conducts later than the auxiliary contact unit and disconnects earlier than the auxiliary contact unit. The load switch can use the conduction or disconnection of the main contact unit to realize its own conduction or disconnection. By reasonably setting the conduction and disconnection times of the additional auxiliary contact unit, it can be realized that the main contact unit bears the electrical load and the auxiliary contact unit bears the arc discharge. While achieving the arc extinguishing function, it also effectively avoids the influence of the main contact unit by the arc discharge phenomenon, reduces the occurrence of oxidation, carbonization and other phenomena of the main contact unit, improves the stability of the main contact unit, extends the service life of the main contact unit, changes the phenomenon that the main contact unit alone bears the arc discharge when conducting or disconnecting, and can also omit the corresponding complex arc extinguishing circuit or device, etc., reduces the process requirements of the corresponding arc extinguishing measures, so as to facilitate the design of a load switch with small occupied space, low cost and reliable operation.

[0045] Optionally, continue to refer to Figures 1-4, the main contact unit 21 includes a first moving contact 211 and a first static contact 212 which are arranged at relative positions; the auxiliary contact unit 22 includes a second moving contact 221 and a second static contact 222 which are arranged at relative positions; the other ends of the driving module 10 are fixedly connected to the first moving contact 211 and the second moving contact 221 respectively; the first moving contact 211 and the first static contact 212 can be closed or separated to make the main contact unit 21 conduct or disconnect, the second moving contact 221 and the second static contact 222 can be closed or separated to make the auxiliary contact unit 22 conduct or disconnect, and the first moving contact 211 and the first static contact 212 close later than the second moving contact 221 and the second static contact 222, and the first moving contact 211 and the first static contact 212 separate earlier than the second moving contact 221 and the second static contact 222.

[0046] Specifically, the main contact unit 21 includes a first moving contact 211 and a first static contact 212 which are arranged in a relative position. Herein, the relative position arrangement can be understood as at least partial regions of the orthographic projections of the first moving contact 211 and the first static contact 212 on the same plane overlapping. Moreover, when the first moving contact 211 and the first static contact 212 are in contact (establishing an electrical connection relationship), it means that the first moving contact 211 and the first static contact 212 are closed, thereby enabling the main contact unit 21 to conduct; when the first moving contact 211 and the first static contact 212 are not in contact (disconnecting the electrical connection relationship), it means that the first moving contact 211 and the first static contact 212 are disconnected, thereby enabling the main contact unit 21 to be disconnected. Similarly, the auxiliary contact unit 22 includes a second moving contact 221 and a second static contact 222 which are arranged in a relative position. Herein, the relative position arrangement can be understood as at least partial regions of the orthographic projections of the second moving contact 221 and the second static contact 222 on the same plane overlapping. Moreover, when the second moving contact 221 and the second static contact 222 are in contact (establishing an electrical connection relationship), it means that the second moving contact 221 and the second static contact 222 are closed, thereby enabling the auxiliary contact unit 22 to conduct; when the second moving contact 221 and the second static contact 222 are not in contact (disconnecting the electrical connection relationship), it means that the second moving contact 221 and the second static contact 222 are disconnected, thereby enabling the auxiliary contact unit 22 to be disconnected. In a specific embodiment, the closing of the first moving contact 211 and the first static contact 212 is later than that of the second moving contact 221 and the second static contact 222, so that the conduction times of the main contact unit 21 and the auxiliary contact unit 22 are different. The auxiliary contact unit 22 can bear the arc discharge, and the main contact unit 21 can bear the electrical load. The main contact unit 21 will not be affected by the arc discharge, effectively avoiding the problems that the main contact unit 21 bears the arc discharge and is oxidized and carbonized due to the influence of the arc discharge, and achieving the arc extinguishing effect to a certain extent. In another specific embodiment, the separation of the first moving contact 211 and the first static contact 212 is earlier than that of the second moving contact 221 and the second static contact 222, so that the disconnection times of the main contact unit 21 and the auxiliary contact unit 22 are different. The auxiliary contact unit 22 can bear the arc discharge, and the main contact unit 21 can bear the electrical load. The main contact unit 21 will not be affected by the arc discharge, effectively avoiding the problems that the main contact unit 21 bears the arc discharge and is oxidized and carbonized due to the influence of the arc discharge, and achieving the arc extinguishing effect to a certain extent.

[0047] Moreover, the other ends of the driving module 10 can be fixedly connected to the first moving contact 211 and the second moving contact 221 respectively. The first moving contact 211 and the first static contact 212 can be closed or separated, and the second moving contact 221 and the second static contact 222 can be closed or separated, so that the main contact unit 21 and the auxiliary contact unit 22 are conducted or disconnected, and further the load switch is conducted or disconnected. That is, the driving module 10 can drive simultaneously to control the on-off actions of the main contact unit 21 and the auxiliary contact unit 22, as well as the closing and opening actions of the corresponding load switch, effectively improving the action reliability and stability of the load switch.

[0048] Furthermore, Figure 5 is Figure 1 a schematic diagram of the contact distance in the off state of the load switch shown in, as Figures 1-5 shown, in the off state of the load switch, in the first direction X, the distance L1 between the first moving contact 211 and the first static contact 212 is greater than the distance L2 between the second moving contact 221 and the second static contact 222; wherein, the first direction X is the moving direction for the first moving contact 211 and the first static contact 212 to close, and the first direction X is also the moving direction for the second moving contact 221 and the second static contact 222 to close.

[0049] Specifically, during the process of the load switch changing from the off state to the on state, since the distance between the second moving contact 221 and the second static contact 222 is relatively close, the second moving contact 221 and the second static contact 222 first close, and the second moving contact 221 and the second static contact 222 bear the arc discharge. After that, with the driving action of the driving module 10, the relatively far - apart first moving contact 211 and the first static contact 212 can also close, thus effectively protecting the first moving contact 211 and the first static contact 212. Exemplarily, the contact size of the second moving contact 221 and the second static contact 222, and the distance L2 between the second moving contact 221 and the second static contact 222 can be determined according to the on - off action time of the load switch and the magnitude of the electrical load. In addition, Figure 2 it can also be clearly seen that in the first direction X, the distance L1 between the first moving contact 211 and the first static contact 212 is greater than the distance L2 between the second moving contact 221 and the second static contact 222.

[0050] Optionally, continuing to refer to Figures 1-4 , the action module 20 further includes a moving spring piece 23; both the first moving contact 211 and the second moving contact 221 are fixedly arranged on the moving spring piece 23; the other end of the driving module 10 is fixedly connected to one end of the moving spring piece 23. Further, the load switch further includes a housing 30; the other end of the moving spring piece 23 is fixedly arranged on the inner wall of the housing 30.

[0051] Specifically, the action module 20 includes a main contact unit 21, an auxiliary contact unit 22, and a moving spring piece 23. Among them, the main contact unit 21 includes a first moving contact 211 and a first static contact 212, and the auxiliary contact unit 22 includes a second moving contact 221 and a second static contact 222. The other end of the driving module 10 is fixedly connected to one end of the moving spring piece 23. In this way, the moving spring piece 23 can be compressed or elongated under the driving action of the driving module 10. Moreover, both the first moving contact 211 and the second moving contact 221 are fixedly arranged on the moving spring piece 23, so that during the subsequent morphological change of the moving spring piece 23, the positions of the first moving contact 211 and the second moving contact 221 change accordingly, so as to realize the closing or separation between the first moving contact 211 and the first static contact 212, and the closing or separation between the second moving contact 221 and the second static contact 222.

[0052] In addition, one end of the moving spring piece 23 is fixedly connected to the driving module 10, and the other end of the moving spring piece 23 is fixedly arranged on the inner wall of the housing 30. In this way, the moving spring piece 23 can realize an arc-shaped movement like scissors. Exemplarily, during the closing process of the load switch, the second moving contact 221 and the second static contact 222 with a relatively short distance are closed first, and the first moving contact 211 and the first static contact 212 with a relatively long distance are closed later.

[0053] Optionally, continue to refer to Figures 1-4 , the load switch further includes a first lead piece 41 and a second lead piece 42; the first lead piece 41 is fixedly connected to the moving spring piece 23; the second lead piece 42 is fixedly connected to the first static contact 212 and the second static contact 222 respectively.

[0054] Specifically, the first lead piece 41 is fixedly connected to the moving spring piece 23, and the second lead piece 42 is fixedly connected to the first static contact 212 and the second static contact 222 respectively. That is to say, the first lead piece 41 forms a series structure with the second lead piece 42 through the first moving contact 211, the first static contact 212 in sequence, and the first lead piece 41 forms a series structure with the second lead piece 42 through the second moving contact 221, the second static contact 222 in sequence. In this way, the first lead piece 41 and the second lead piece 42 can be installed as connection terminals into the current loop of a relevant intelligent electricity meter, so as to facilitate the subsequent conduction or disconnection of the load switch according to the conduction or disconnection actions of the main contact unit 21 and the auxiliary contact unit 22, and further enable other components connected in series with the load switch on the same branch to be in a powered-on or powered-off state.

[0055] Optionally, continue to refer to Figures 1-4, the load switch further includes a housing 30; the first stationary contact 212 and the second stationary contact 222 are both fixedly arranged on the inner wall of the housing 30, and the first moving contact 211 and the second moving contact 221 are both fixedly arranged on the same side surface of the moving spring piece 23 close to the first stationary contact 212 and the second stationary contact 222.

[0056] Specifically, the load switch further includes a housing 30. The control module, the drive module 10, and the action module 20 can all be arranged inside the housing 30. The first stationary contact 212 and the second stationary contact 222 are both fixedly arranged on the inner wall of the housing 30, that is, the first stationary contact 212 and the second stationary contact 222 maintain fixed positions. The first moving contact 211 and the second moving contact 221 are both fixedly arranged on the same side surface of the moving spring piece 23 close to the first stationary contact 212 and the second stationary contact 222. In this way, the relative position setting of the first moving contact 211 and the first stationary contact 212 is limited, and the relative position setting of the second moving contact 221 and the second stationary contact 222 is limited. Exemplarily, according to the relative position relationship between the moving spring piece 23 and the inner wall of the housing 30, the positions of the first moving contact 211, the second moving contact 221, the first stationary contact 212, and the second stationary contact 222 can be reasonably selected so that the first moving contact 211 and the first stationary contact 212 can be closed or separated, and the second moving contact 221 and the second stationary contact 222 can be closed or separated.

[0057] Optionally, continue to refer to Figures 1-4 , the drive module 10 includes an electromagnetic drive unit 11 and a push rod unit 12; one end of the electromagnetic drive unit 11 is electrically connected to the control module, the other end of the electromagnetic drive unit 11 is fixedly connected to one end of the push rod unit 12, and the other end of the push rod unit 12 is fixedly connected to the main contact unit 21 and the auxiliary contact unit 22 respectively.

[0058] Specifically, the driving module 10 includes an electromagnetic driving unit 11 and a push rod unit 12. One end of the electromagnetic driving unit 11 is electrically connected to the control module, and the other end of the electromagnetic driving unit 11 is fixedly connected to one end of the push rod unit 12. Then, the electromagnetic driving unit 11 can receive the control signal sent by the control module and drive the push rod unit 12 to act under the action of this control signal. Exemplarily, the electromagnetic driving unit 11 can drive the push rod unit 12 to change its position. Exemplarily, the electromagnetic driving unit 11 can drive the push rod unit 12 to move up and down or left and right. The other end of the push rod unit 12 is fixedly connected to the main contact unit 21 and the auxiliary contact unit 22 respectively. Thus, as the push rod unit 12 moves in position, the main contact unit 21 and the auxiliary contact unit 22 also move in position accordingly. Exemplarily, the movement of the push rod unit 12 in position can drive the first moving contact 211 and the second moving contact 221 to move, so that the first moving contact 211 and the first static contact 212 are closed or separated, and the second moving contact 221 and the second static contact 222 are closed or separated, thereby realizing the conduction or disconnection of the load switch.

[0059] Further, with continued reference to Figures 1-4 , the electromagnetic driving unit 11 includes a driving coil 111 and an armature 112; one end of the driving coil 111 is electrically connected to the control module, and the magnetic field generated by the driving coil 111 drives the armature 112 to move, and one end of the armature 112 is fixedly connected to one end of the push rod unit 12.

[0060] Specifically, the electromagnetic driving unit 11 includes a driving coil 111 and an armature 112. One end of the driving coil 111 is electrically connected to the control module. Exemplarily, the control module can apply a conduction voltage to the driving coil 111 so that the driving coil 111 generates a magnetic field, and then the armature 112 can be driven to move in this magnetic field. It can be understood that due to different requirements for the conduction or disconnection of the load switch, the polarity of the conduction voltage applied by the control module to the driving coil 111 is different, the direction of the magnetic field generated by the driving coil 111 is also different, and the direction in which the armature 112 is driven to move is also different. One end of the armature 112 is fixedly connected to one end of the push rod unit 12. Exemplarily, the armature 112 can be a T-shaped armature, and the swinging action of the armature 112 causes the push rod unit 12 to act, and the push rod unit 12 can further push the main contact unit 21 and the auxiliary contact unit 22 to act. Exemplarily, the push rod unit 12 can push the moving spring piece 23 to act, and then the main contact unit 21 and the auxiliary contact unit 22 change their positions accordingly as the position of the moving spring piece 23 changes.

[0061] In addition, the electromagnetic driving unit 11 may further include a magnet, and the driving coil 111 is disposed around the magnet. The magnet can transmit magnetism and effectively enhance the intensity of the magnetic field generated by the driving coil 111, thereby changing the distance that the armature 112 is driven to move and the distance of the corresponding position change of the push rod unit 12.

[0062] Optionally, with continued reference to Figures 1-4 , the driving module 10 further includes a magnetic shielding cover ( Figures 1-4 not shown in the figure); the electromagnetic driving unit 11 is placed inside the magnetic shielding cover. In this way, the magnetic shielding cover can effectively prevent the interference of the external magnetic field on the normal operation of the electromagnetic driving unit 11.

[0063] Based on the same concept, the embodiment of the present invention further provides an intelligent electricity meter, and the intelligent electricity meter includes a load switch as described in any one of the embodiments of the present invention. Therefore, the intelligent electricity meter provided by the embodiment of the present invention has the corresponding beneficial effects of the load switch provided by the embodiment of the present invention, which will not be elaborated here.

[0064] Note that the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments, combinations with each other and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A load switch, characterized in that, It includes a control module, a drive module and an action module; The action module includes a main contact unit and an auxiliary contact unit, and the main contact unit and the auxiliary contact unit form a parallel structure; One end of the drive module is electrically connected to the control module, and the other end of the drive module is fixedly connected to the main contact unit and the auxiliary contact unit respectively; Both the main contact unit and the auxiliary contact unit can be turned on or off, so that the load switch is turned on or off, and the main contact unit is turned on later than the auxiliary contact unit, and the main contact unit is turned off earlier than the auxiliary contact unit.

2. The load switch according to claim 1, characterized in that, The main contact unit includes a first moving contact and a first static contact arranged at relative positions; the auxiliary contact unit includes a second moving contact and a second static contact arranged at relative positions; The other end of the drive module is fixedly connected to the first moving contact and the second moving contact respectively; The first moving contact and the first static contact can be closed or separated, so that the main contact unit is turned on or off, and the second moving contact and the second static contact can be closed or separated, so that the auxiliary contact unit is turned on or off, and the first moving contact and the first static contact are closed later than the second moving contact and the second static contact, and the first moving contact and the first static contact are separated earlier than the second moving contact and the second static contact.

3. The load switch according to claim 2, characterized in that, In the off state of the load switch, in a first direction, the distance between the first moving contact and the first static contact is greater than the distance between the second moving contact and the second static contact; wherein, the first direction is the moving direction of the first moving contact and the first static contact when they are closed, and the first direction is also the moving direction of the second moving contact and the second static contact when they are closed.

4. The load switch according to claim 2, characterized in that, The action module further includes a moving spring piece; Both the first moving contact and the second moving contact are fixedly arranged on the moving spring piece; The other end of the drive module is fixedly connected to the moving spring piece.

5. The load switch according to claim 4, characterized in that, This load switch further includes a first lead-out piece and a second lead-out piece; The first lead-out piece is fixedly connected to the moving spring piece; The second lead-out piece is fixedly connected to the first static contact and the second static contact respectively.

6. The load switch according to claim 4, characterized in that, This load switch further includes a housing; Both the first static contact and the second static contact are fixedly arranged on the inner wall of the housing, and both the first moving contact and the second moving contact are fixedly arranged on the same side surface of the moving spring piece close to the first static contact and the second static contact.

7. The load switch according to claim 1, characterized in that The drive module includes an electromagnetic drive unit and a push rod unit; One end of the electromagnetic drive unit is electrically connected to the control module, the other end of the electromagnetic drive unit is fixedly connected to one end of the push rod unit, and the other end of the push rod unit is fixedly connected to the main contact unit and the auxiliary contact unit respectively.

8. The load switch according to claim 7, characterized in that, The electromagnetic drive unit includes a drive coil and an armature; One end of the drive coil is electrically connected to the control module, the magnetic field generated by the drive coil drives the armature to move, and one end of the armature is fixedly connected to one end of the push rod unit.

9. The load switch according to claim 7, characterized in that, The drive module further includes a magnetic isolation cover; The electromagnetic drive unit is placed inside the magnetic isolation cover.

10. An intelligent electric energy meter, characterized in that, Comprising a load switch as described in any one of claims 1-9.

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