CN118538578A - Relay and electric device - Google Patents

Abstract

The present invention discloses a relay and an electrical device, wherein the relay comprises an auxiliary contact circuit, a temperature acquisition circuit and a first control board, wherein the auxiliary contact circuit and the temperature acquisition circuit are electrically connected to the first control board respectively. By connecting the first control board to the auxiliary contact circuit and the temperature acquisition circuit, when the auxiliary contact circuit and the temperature acquisition circuit are short-circuited or have reached the end of their service life, the first control board can effectively and synchronously monitor the state of the main contact, thereby ensuring the normal operation of the relay, and further improving the safety of the relay.

Description

Relays and electrical equipment

Technical Field

The present invention relates to the technical field of relays, and in particular to a relay and an electrical device.

Background Art

At present, in high-voltage DC relays with auxiliary contacts, the contact lead-out terminals and auxiliary contact lead-out terminals are fixed on ceramics respectively. When the main contacts are disconnected and arced, metal particles splash, which will cause high-voltage breakdown of the auxiliary contacts. Moreover, the main contacts cannot actively monitor the abnormality of the main contacts in time when they are short-circuited under special working conditions, which will lead to continuous high temperature and inability to ensure safety.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a relay that can avoid high voltage breakdown of auxiliary contacts and effectively monitor main contacts synchronously when short circuit occurs, thereby ensuring the normal operation of the relay and further improving the safety of the relay.

The present invention further provides an electrical device.

The relay according to the present invention comprises: an auxiliary contact circuit, a temperature collection circuit and a first control board, wherein the auxiliary contact circuit and the temperature collection circuit are electrically connected to the first control board respectively.

According to the relay of the present invention, by connecting the first control board to the auxiliary contact circuit and the temperature acquisition circuit, when the auxiliary contact circuit and the temperature acquisition circuit are short-circuited or their life ends, the first control board can effectively and synchronously monitor the status of the main contacts, thereby ensuring the normal operation of the relay and further improving the safety of the relay.

In some examples of the present invention, the auxiliary contact circuit includes: a magnetic switch and a first wire, and the first wire is electrically connected between the first control board and the magnetic switch.

In some examples of the present invention, the relay also includes: a magnet, which is disposed at one end of the magnetic switch, and the magnet can move in a direction away from or adjacent to the magnetic switch, and when the magnetic switch is affected by the magnetic field of the magnet, the magnetic switch is in an off state, and when the magnetic switch is out of the influence of the magnetic field of the magnet, the magnetic switch is in an on state.

In some examples of the present invention, the auxiliary contact circuit also includes: a second control board, the magnetic switch is electrically connected to the second control board, the first control board is provided with a first connecting portion, and the first wire is electrically connected between the first connecting portion and the second control board.

In some examples of the present invention, the relay further includes: a relay body, the first control board is arranged on an outer side wall of the relay body, and the second control board is arranged on a bottom inside the relay body.

In some examples of the present invention, the relay further includes: a mounting bracket, and the second control board is fixed on the mounting bracket.

In some examples of the present invention, the relay further includes: a static contact, the temperature acquisition circuit includes: a thermistor, the thermistor is used to detect the temperature at the static contact, and the thermistor is electrically connected to the first control board.

In some examples of the present invention, the relay further includes: a ceramic shell, the static contact is arranged at one end of the ceramic shell, the thermistor is attached to the outer surface of the ceramic shell, and the thermistor extends toward the static contact.

In some examples of the present invention, the thermistor includes: a probe, a second wire and a connecting terminal, the probe is arranged adjacent to the static contact, the second wire is electrically connected between the probe and the connecting terminal, and the first control board is also provided with a second connecting portion, and the connecting terminal is electrically connected to the second connecting portion.

In some examples of the present invention, the relay also includes: a buffer pad, the buffer pad is provided with a static contact positioning hole and a detection groove, the static contact positioning hole and the detection groove are arranged at intervals, the static contact is fitted in the static contact positioning hole, and at least part of the thermistor is arranged in the detection groove.

In some examples of the present invention, the buffer pad is a rubber structural member.

In some examples of the present invention, the relay further includes: a coil assembly, the coil assembly includes: a coil frame and a coil body, the first control board is fixed on the coil frame, and the coil body is electrically connected to the first control board.

In some examples of the present invention, the first control board is further provided with a fixing portion and a third connecting portion, the fixing portion is mounted and fixed to the coil frame, and the third connecting portion is electrically connected to the coil body.

In some examples of the present invention, the first control board is further provided with a plurality of connectors, and the plurality of connectors are arranged at intervals.

The electrical equipment according to the present invention comprises: the relay mentioned above.

Compared with the prior art, the vehicle provided by the present invention adopts a method of connecting the auxiliary contact circuit and the temperature acquisition circuit to the first control board. When the auxiliary contact circuit and the temperature acquisition circuit are short-circuited or their life ends, the first control board can effectively and synchronously monitor the status of the main contacts, thereby ensuring the normal operation of the relay and further improving the safety of the relay.

Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG1 is a first angle cross-sectional view of a relay according to an embodiment of the present invention;

2 is a second angled cross-sectional view of a relay according to an embodiment of the present invention;

FIG3 is a schematic structural diagram of a relay according to an embodiment of the present invention;

FIG4 is a schematic diagram of a partial structure of a relay according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of the structure of a thermistor.

Reference numerals:

100. Relay;

10. First control board; 11. Magnetic switch; 12. First wire; 13. Magnet; 14. Second control board; 15. Mounting bracket; 16. Static contact; 17. Thermistor; 18. Ceramic housing; 19. Probe; 20. Second wire; 21. Connecting terminal; 22. Buffer pad; 23. Coil assembly; 24. Connector; 25. First connecting part; 26. Second connecting part; 27. Third connecting part;

30. Moving iron core; 31. Return spring; 32. Push rod; 33. Moving touch plate; 34. Stationary iron core.

DETAILED DESCRIPTION

Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

A relay 100 according to an embodiment of the present invention is described below with reference to FIG. 1 to FIG. 5 . The relay 100 is applied to an electrical device, such as a vehicle.

As shown in FIG. 2 and FIG. 3 , the relay 100 according to the present invention comprises: an auxiliary contact circuit, a temperature acquisition circuit and a first control board 10 , and the auxiliary contact circuit and the temperature acquisition circuit are electrically connected to the first control board 10 respectively.

It can be understood that the auxiliary contact circuit, the temperature acquisition circuit and the first control board 10 constitute the main structure of the relay 100. The auxiliary contact circuit can realize the functions of signal transmission and control, the temperature acquisition circuit can accurately measure and record the temperature, and the first control board 10 is connected to the auxiliary contact circuit and the temperature acquisition circuit respectively. This setting can enable the first control board 10 to effectively and synchronously monitor the status of the main contact. When the auxiliary contact circuit and the temperature acquisition circuit are short-circuited or their lifespan ends, the first control board 10 can ensure the normal operation of the relay 100.

Therefore, by connecting the first control board 10 between the auxiliary contact circuit and the temperature acquisition circuit, when the auxiliary contact circuit and the temperature acquisition circuit are short-circuited or their life ends, the first control board 10 can effectively and synchronously monitor the status of the main contacts, thereby ensuring the normal operation of the relay 100 and further improving the safety of the relay 100.

As shown in Fig. 1 to Fig. 3, the auxiliary contact circuit includes: a magnetic switch 11 and a first wire 12, and the first wire 12 is electrically connected between the first control board 10 and the magnetic switch 11. That is to say, the magnetic switch 11 and the first wire 12 constitute the main structure of the auxiliary contact circuit, one end of the first wire 12 is connected to the first control board 10, and the other end of the first wire 12 is welded to the magnetic switch 11, so that the first control board 10 and the magnetic switch 11 can be connected, and then the first control board 10 can effectively and synchronously monitor the state of the main contact.

In addition, as shown in FIG. 1 , the relay 100 further includes a magnet 13, which is disposed at one end of the magnetic switch 11 and can move in a direction away from or close to the magnetic switch 11. When the magnetic switch 11 is affected by the magnetic field of the magnet 13, the magnetic switch 11 is in an off state. When the magnetic switch 11 is out of the influence of the magnetic field of the magnet 13, the magnetic switch 11 is in an on state.

It can be understood that the magnet 13 is located on one side of the magnetic switch 11, and the magnet 13 can be close to or away from the magnetic switch 11. This arrangement allows the magnet 13 to control the on and off of the magnetic switch 11, so that when the magnet 13 is close to the magnetic switch 11, the magnetic switch 11 is disconnected, and when the magnet 13 is away from the magnetic switch 11, the magnetic switch 11 is turned on, thereby enabling the on and off of the magnetic switch 11 to ensure the normal operation of the relay 100.

In addition, as shown in FIG. 4 , the auxiliary contact circuit further includes: a second control board 14 , the magnetic switch 11 is electrically connected to the second control board 14 , the first control board 10 is provided with a first connecting portion, and the first wire 12 is electrically connected between the first connecting portion and the second control board 14 .

That is to say, both ends of the magnetic switch 11 are welded to the second control board 14, a first connecting portion is provided on the first control board 10, one end of the first wire 12 is connected to the first connecting portion, and the other end of the first wire 12 is connected to the second control board 14, so that an auxiliary contact circuit can be formed between the second control board 14 and the magnetic switch 11, thereby facilitating the first control board 10 to monitor the auxiliary contact circuit.

In addition, as shown in the figure, the relay 100 also includes: a relay body, a first control board 10 is arranged on the outer side wall of the relay body, and a second control board 14 is arranged at the bottom of the relay body. It can be understood that the first control board 10 is located on the side wall of the relay body, and the second control board 14 is located at the bottom of the relay body. This arrangement facilitates the connection of the first control board 10 with the auxiliary contact circuit and the temperature acquisition circuit, and facilitates the connection of the second control board 14 with the magnetic switch 11, so that the layout structure of the relay 100 can be optimized and the performance of the relay 100 can be guaranteed.

In addition, as shown in FIG1 , the relay 100 further includes: a mounting bracket 15, and the second control board 14 is fixed on the mounting bracket 15. It can be understood that the mounting bracket 15 limits the second control board 14, so that the second control board 14 is conveniently arranged in the relay 100, and the second control board 14 and the mounting bracket 15 are fastened and connected by self-tapping screws, so that the second control board 14 is conveniently installed and removed relative to the mounting bracket 15.

In addition, as shown in Fig. 1 to Fig. 3 and Fig. 5, the relay 100 further includes: a static contact 16, and the temperature acquisition circuit includes: a thermistor 17, the thermistor 17 is used to detect the temperature at the static contact 16, and the thermistor 17 is electrically connected to the first control board 10. That is to say, the thermistor 17 is connected to the first control board 10, and the thermistor 17 is arranged close to the static contact 16, so that the thermistor 17 can detect the temperature of the static contact 16, and then the rated current, half-rated current, and temperature rise measured data of different multiples of short-circuit current are fed back. When the temperature rise of the multiple short-circuit current occurs, the first control board 10 controls whether to disconnect the circuit, so as to ensure the normal operation of the relay 100.

In addition, as shown in FIG. 1 to FIG. 3 , the relay 100 further includes: a ceramic housing 18, a static contact 16 is arranged at one end of the ceramic housing 18, a thermistor 17 is attached to the outer surface of the ceramic housing 18, and the thermistor 17 extends in the direction of the static contact 16. It can be understood that the static contact 16 is arranged at one end of the ceramic housing 18, and the thermistor 17 is attached to the outer surface of the ceramic housing 18, thereby optimizing the internal design of the relay 100, and reducing the volume of the relay 100, thereby saving costs, and the thermistor 17 extends in the direction of the static contact 16, so that the thermistor 17 can detect the temperature of the static contact 16, and then the rated current, half-rated current, and temperature rise measured data of different multiples of short-circuit current are fed back, and when the temperature rise of multiple short-circuit current occurs, the first control board 10 controls whether to disconnect the circuit, thereby ensuring the normal operation of the relay 100.

In addition, as shown in Figure 5, the thermistor 17 includes: a probe 19, a second wire 20 and a connecting terminal 21, the probe 19 is arranged adjacent to the static contact 16, the second wire 20 is electrically connected between the probe 19 and the connecting terminal 21, and the first control board 10 is also provided with a second connecting portion, and the connecting terminal 21 is electrically connected to the second connecting portion.

That is to say, the probe 19, the second wire 20 and the connecting terminal 21 constitute the main structure of the thermistor 17. The probe 19 is arranged close to the static contact 16, so that the probe 19 can detect the temperature of the static contact 16. One end of the second wire 20 is connected to the probe 19, and the other end of the second wire 20 is connected to the connecting terminal 21. The first control board 10 is provided with a second connecting part, and the connecting terminal 21 is connected to the second connecting part. This arrangement enables the probe 19 to detect the temperature of the static contact 16, and then feed back the measured temperature rise data of the rated current, half-rated current, and different multiples of short-circuit current to the first control board 10 through the connecting terminal 21. When the temperature rise of the multiple short-circuit current occurs, the first control board 10 controls whether to disconnect the circuit, thereby ensuring the normal operation of the relay 100.

In addition, as shown in Figures 1 and 3, the relay 100 also includes: a buffer pad 22, the buffer pad 22 is provided with a static contact positioning hole and a detection groove, the static contact positioning hole and the detection groove are arranged at intervals, the static contact 16 is fitted in the static contact positioning hole, and at least part of the thermistor 17 is arranged in the detection groove.

It can be understood that the buffer pad 22 is provided with a static contact positioning hole and a detection groove, so that the buffer pad 22 can position the static contact 16 and the thermistor 17, thereby facilitating the installation of the static contact 16 and the thermistor 17 in the buffer pad 22, and the static contact positioning hole and the detection groove are arranged at intervals, so that the static contact 16 and the thermistor 17 can be arranged adjacent to each other, thereby facilitating the thermistor 17 to detect the temperature of the static contact 16. For example, the buffer pad 22 is a rubber structural member.

In addition, as shown in FIG. 1 and FIG. 2 , the relay 100 further includes: a coil assembly 23 , the coil assembly 23 includes: a coil frame and a coil body, the first control board 10 is fixed on the coil frame, and the coil body is electrically connected to the first control board 10 .

That is to say, the coil skeleton and the coil body constitute the main body of the coil assembly 23. The coil skeleton can limit the first control board 10, thereby facilitating the installation of the first control board 10 on the relay 100. The coil body is connected to the first control board 10, thereby ensuring the normal operation of the first control board 10.

In addition, as shown in Figures 1 and 2, the first control board 10 is also provided with a fixing portion and a third connecting portion, the fixing portion is fixedly mounted on the coil frame, and the third connecting portion is electrically connected to the coil body. It can be understood that the fixing portion and the third connecting portion are provided on the first control board 10, and the coil frame can limit the fixing portion, so that the fixing portion and the coil frame can be connected, thereby facilitating the first control board 10 to be installed on the coil frame, and the third connecting portion is connected to the coil body, so that the normal operation of the first control board 10 can be ensured.

In addition, as shown in Fig. 3, the first control board 10 is further provided with a plurality of connectors 24, and the plurality of connectors 24 are arranged at intervals. That is, the plurality of connectors 24 are arranged in the first control board 10, so that the first control board 10 can realize the functions of low-voltage control power input, contact monitoring and temperature rise monitoring, and can also optimize the occupied volume of the relay 100, thereby saving costs.

Specifically, the working process of the relay 100 is as follows: when the external power supply inputs a low voltage to the coil assembly 23, the coil assembly 23 generates an electromagnetic field drive, and the moving iron core 30 compresses the reset spring 31 under the drive of the external electromagnetic force, so that the reset spring 31 generates an upward movement force, and the push rod 32 is welded to the iron core, and the push rod 32 drives the moving contact plate 33 to move upward, and continues to compress the reset spring 31 after contacting the static contact 16, so that the reset spring 31 generates an upward movement force, and the moving iron core 30 and the static iron core 34 move The distance is greater than the moving touch plate 33 and the static contact 16, otherwise it stops working, and the magnet 13 is located in the moving iron core 30, so that the magnet 13 and the moving iron core 30 can move together, and the magnetic switch 11 is affected by the magnetic field of the magnet 13. At this time, the magnetic switch 11 is in the disconnected state, and when the moving iron core 30 and the magnet 13 move upward, the magnetic switch 11 is free from the restraint of the magnetic field, and at this time, the magnetic switch 11 is in the connected state.

The electrical equipment according to the present invention includes: the relay 100 of the above embodiment. By connecting the first control board 10 to the auxiliary contact circuit and the temperature acquisition circuit, when the auxiliary contact circuit and the temperature acquisition circuit are short-circuited or have reached the end of their service life, the first control board 10 can effectively and synchronously monitor the state of the main contact, thereby ensuring the normal operation of the relay 100, and further improving the safety of the relay 100.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. In the description of the present invention, a first feature "above", "above" and "above" a second feature may include the first feature being directly above and obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims (15)

1. A relay (100), characterized by comprising:

An auxiliary contact loop;

A temperature acquisition loop;

and the auxiliary contact circuit and the temperature acquisition circuit are respectively electrically connected with the first control board (10).

2. The relay (100) according to claim 1, wherein the auxiliary contact circuit comprises: a magnetic switch (11) and a first wire (12), the first wire (12) being electrically connected between the first control board (10) and the magnetic switch (11).

3. The relay (100) according to claim 2, further comprising: the magnet (13), magnet (13) set up in the one end of magnetic switch (11), just magnet (13) can be kept away from or be close to direction motion of magnetic switch (11), when magnetic switch (11) are influenced by magnet (13) magnetic field, magnetic switch (11) are the off-state, when magnetic switch (11) break away from when magnetic switch (13) magnetic field influences, magnetic switch (11) are the on-state.

4. The relay (100) according to claim 2, wherein the auxiliary contact circuit further comprises: the magnetic switch (11) is electrically connected to the second control board (14), the first control board (10) is provided with a first connecting portion (25), and the first lead (12) is electrically connected between the first connecting portion (25) and the second control board (14).

5. The relay (100) according to claim 4, further comprising: the relay comprises a relay body, wherein the first control board (10) is arranged on the outer side wall of the relay body, and the second control board (14) is arranged at the bottom in the relay body.

6. The relay (100) according to claim 4, further comprising: and the second control panel (14) is fixed on the mounting bracket (15).

7. The relay (100) according to claim 1, further comprising: a stationary contact (16), the temperature acquisition circuit comprising: -a thermistor (17), the thermistor (17) being for detecting the temperature at the stationary contact (16), and the thermistor (17) being electrically connected with the first control board (10).

8. The relay (100) according to claim 7, further comprising: the ceramic shell (18), the stationary contact (16) set up in the one end of ceramic shell (18), thermistor (17) paste locate the surface of ceramic shell (18), just thermistor (17) to the direction of stationary contact (16) extends.

9. The relay (100) according to claim 7, wherein the thermistor (17) comprises: probe (19), second wire (20) and connecting terminal (21), probe (19) are adjacent stationary contact (16) set up, second wire (20) electricity connect in probe (19) with between connecting terminal (21), first control panel (10) still is provided with second connecting portion (26), connecting terminal (21) with second connecting portion (26) electricity are connected.

10. The relay (100) according to claim 7, further comprising: the buffer pad (22), buffer pad (22) are provided with stationary contact locating hole and detection groove, stationary contact locating hole with the detection groove interval sets up, stationary contact (16) cooperate in the stationary contact locating hole, at least part thermistor (17) set up in the detection groove.

11. The relay (100) of claim 10, wherein the cushion (22) is a rubber structure.

12. The relay (100) according to claim 1, further comprising: -a coil assembly (23), the coil assembly (23) comprising: the coil framework and the coil body, the first control board (10) is fixed on the coil framework, and the coil body is electrically connected with the first control board (10).

13. The relay (100) according to claim 12, wherein the first control board (10) is further provided with a fixing portion and a third connecting portion (27), the fixing portion being fixedly mounted to the bobbin, the third connecting portion (27) being electrically connected to the coil body.

14. The relay (100) according to claim 1, wherein the first control board (10) is further provided with a plurality of connectors (24), a plurality of the connectors (24) being disposed at intervals therebetween.

15. A powered device, comprising: the relay (100) of any of claims 1-14.