CN215527597U - Contactor with protection function and electric equipment - Google Patents
Contactor with protection function and electric equipment Download PDFInfo
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- CN215527597U CN215527597U CN202121988115.8U CN202121988115U CN215527597U CN 215527597 U CN215527597 U CN 215527597U CN 202121988115 U CN202121988115 U CN 202121988115U CN 215527597 U CN215527597 U CN 215527597U
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Abstract
The utility model discloses a contactor with a protection function and electric equipment, wherein the contactor comprises: the device comprises at least one main contact component, at least one auxiliary contact component and a control circuit, wherein each main contact component comprises a moving contact and a fixed contact, and the main contact component is provided with a position sensor for detecting the actual distance Ln between the moving contact and the fixed contact; the coil is switched to be in a switching state by electrifying or powering off the coil, and is provided with a temperature detection device for detecting the actual temperature Tn of the coil; a self-diagnosis module which receives detection data of the position sensor and the temperature detection device and judges the state of the contactor; the electrical detection module is used for detecting electrical operation parameters of a wire inlet end and a wire outlet end of the contactor; and the communication module is used for carrying out data interaction with external equipment. The contactor can detect the performance of the contactor, has current and voltage detection functions, and can upload data through the communication module, thereby greatly reducing the use of components, reducing the volume of an electric cabinet, and reducing the fault rate and the cost.
Description
Technical Field
The utility model relates to the technical field of contactors, in particular to a contactor with a protection function and electric equipment.
Background
With the rapid development of society, industrial equipment is continuously updated, the volume of the equipment is required to be continuously reduced, but the function of the equipment is required to be continuously increased, and in the same variable, in order to meet the requirements, the equipment needs to be solved from the device, so that new products and new schemes need to be developed to meet the change of the requirements.
In the field of fixed-frequency air conditioners, protection and control of a compressor or a motor are realized by a large stack of electric components, including a circuit breaker, a contactor, a thermal relay, a mutual inductor, a motor protector and the like, so that the protection and control of the compressor or the motor are realized by a large space required by the assembly quantity and the volume. And the conventional contactor only plays a role in switching on and off a loop, and has no other protection effect, so that the problems of fusing of a contact, burning of a coil and the like can often occur.
Therefore, how to provide a contactor with a protection function is an urgent technical problem to be solved in the industry.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model provides the contactor with the protection function and the electric equipment, wherein the contactor can detect the performance of the contactor, has the current and voltage detection function, and can upload data through the communication module, so that the use of components and parts is greatly reduced, the volume of an electric cabinet is reduced, and the fault rate and the cost are reduced.
The technical scheme adopted by the utility model is that a contactor with a protection function is designed, and the contactor comprises: the device comprises at least one main contact component, at least one auxiliary contact component and a control circuit, wherein each main contact component comprises a moving contact and a fixed contact, and the main contact component is provided with a position sensor for detecting the actual distance Ln between the moving contact and the fixed contact; the coil is switched to be in a switching state by electrifying or powering off the coil, and is provided with a temperature detection device for detecting the actual temperature Tn of the coil; and a self-diagnosis module which receives detection data of the position sensor and the temperature detection device and judges the state of the contactor.
When the difference value delta L between the actual distance Ln and the initial distance L exceeds a preset range, the self-diagnosis module cuts off the power of the coil; and/or when the actual temperature Tn of the coil exceeds the set alarm temperature Tc, the self-diagnosis module sends an alarm signal outwards. And/or the self-diagnostic module de-energizes the coil when the actual temperature Tn of the coil exceeds the maximum limit temperature T.
Preferably, the contactor further comprises: and the electrical detection module is used for detecting the electrical operation parameters of the wire inlet end and the wire outlet end of the contactor.
In some embodiments, the electrical detection module comprises: the device comprises a voltage sampling device arranged at the wire inlet end of the contactor, a voltage detection module for converting the detection signal of the voltage sampling device into voltage detection data, a current sampling device arranged at the wire outlet end of the contactor, and a current detection module for converting the detection signal of the current sampling device into current detection data.
When the voltage detection data exceed the preset voltage range, the voltage detection module cuts off the power of the coil; and/or when the current detection data exceeds a preset current range, the current detection module cuts off the power of the coil.
Preferably, the contactor further comprises: and the communication module is used for data interaction with external equipment, and the self-diagnosis module, the voltage detection module and the current detection module are all connected to the communication module.
Preferably, the communication module receives detection data of the voltage detection module and the current detection module, calculates power detection data according to the voltage detection data and the current detection data, and powers off the coil when the power detection data exceeds a preset power range.
Preferably, a control switch is connected in series between the incoming line end of the contactor and the coil, the control switch is connected with the communication module, and the communication module switches the on-off state of the control switch to power on or off the coil.
Preferably, the contactor further comprises: and the display device is connected with the communication module.
Preferably, the inlet terminal and the outlet terminal of the contactor are both provided with power terminals for wiring.
The utility model also provides electric equipment for connecting or disconnecting the power supply by the contactor, wherein the electric equipment can be an air conditioner or a refrigerator and the like.
Compared with the prior art, the utility model has the following beneficial effects:
1. the contactor is provided with a self-diagnosis module, the state of the contactor is judged according to detection data of the position sensor and the temperature detection device, and the performance of the contactor is detected and protected;
2. the contactor is provided with a voltage detection module and a current detection module, so that the real-time monitoring of the voltage, the current and other operation parameters of the load can be realized;
3. the contactor is provided with a communication module and a display screen, the communication module is used for realizing the transmission function of all detection data, and the display screen is used for displaying the detection data for the user to identify.
Drawings
The utility model is described in detail below with reference to examples and figures, in which:
FIG. 1 is a schematic view of the structure of a contactor according to the present invention;
FIG. 2 is a schematic diagram of the internal circuitry of the contactor of the present invention;
fig. 3 is a schematic diagram of the protection process of the contactor of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
The principles of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1 and 2, the contactor provided by the utility model has a protection function, and comprises: the contactor comprises a contactor shell frame 1, at least one main contact component 5, an auxiliary contact component 3, a coil 2 and a self-diagnosis module 8, wherein the main contact component 5, the coil 2, the self-diagnosis module 8 and the like are arranged on the contactor shell frame 1, each main contact component 5 comprises a moving contact and a fixed contact, the coil 2 is electrified to generate magnetic flux, the main contact component 5 is attracted to connect a loop, and the on-off state of the main contact component 5 can be switched by electrifying or cutting off the coil 2. Each auxiliary contact assembly 3 comprises a normally open contact and a normally closed contact for transferring the contactor state or connecting part control loop and the like. The main contact assembly 5 is provided with a position sensor 13, the position sensor 13 detects the actual distance Ln between the moving contact and the static contact when the state of the main contact assembly 5 changes each time, the coil 2 is provided with a temperature detection device 14, the temperature detection device 14 can adopt a thermistor and the like and is used for detecting the actual temperature Tn of the coil 2 where the temperature detection device is located, and the self-diagnosis module 8 receives the detection data of the position sensor 13 and the temperature detection device 14 and judges the state of the contactor.
As shown in fig. 3, the contactor contact diagnosis detection process is as follows, the self-diagnosis module 8 compares an actual distance Ln detected by the position sensor 13 with an initial distance L between the moving contact and the static contact to obtain a difference value Δ L, and determines whether the Δ L exceeds a preset range, if so, the main contact assembly 5 needs to be replaced due to arcing or abrasion in the pull-in process, and the self-diagnosis module 8 determines that the contactor is abnormal and cuts off the power to the coil 2, and the main contact assembly 5 is disconnected. The predetermined range is determined by analyzing a characteristic curve of the contact wear, and the characteristic curve of the contact wear can be obtained through a plurality of experiments.
The detection and diagnosis process of the contactor coil is as follows, the self-diagnosis module 8 compares the actual temperature Tn of the coil 2 with the set alarm temperature and the maximum limit temperature respectively, when the actual temperature Tn of the coil 2 exceeds the set alarm temperature Tc, the self-diagnosis module 8 sends out an alarm signal, a user can properly adjust the working state of the load to reduce the temperature of the coil after receiving the alarm signal, when the temperature detection device 14 detects that the actual temperature Tn of the coil 2 exceeds the maximum limit temperature T, the self-diagnosis module 8 judges that the contactor is abnormal and cuts off the power of the coil 2, the main contact assembly 5 is disconnected, and the coil 2 is prevented from being burnt.
Further, as shown in fig. 1 and 2, the contactor further includes: the electrical detection module for detecting the electrical operation parameters of the inlet wire end and the outlet wire end of the contactor is convenient for wiring operation, and the inlet wire end and the outlet wire end of the contactor are both provided with power supply terminals 4. Specifically, the electrical detection module includes: voltage sampling device 12, voltage detection module 7, current sampling device 10 and current detection module 9, voltage sampling device 12 installs the inlet wire end at the contactor, gathers the three-phase voltage of contactor inlet wire end, transmits for voltage detection module 7 through 0~ 10V's low-voltage signal, and voltage detection module 7 converts voltage sampling device 12's detected signal into voltage detection data to judge the height of contactor distribution side three-phase voltage, low and three-phase voltage balance according to voltage detection data. The current sampling device 10 is installed at the wire outlet end of the contactor, the device converts a large current into a 1A or 5A current to be transmitted to the current detection module 9 under the action and the principle of coil induction, the current detection module 9 converts a detection signal of the current sampling device 10 into current detection data, and judges the high, low and three-phase current balance of the three-phase current at the load side of the contactor according to the current detection data.
As shown in fig. 3, the voltage detection diagnosis process is as follows, when the voltage detection data exceeds the preset voltage range, the voltage detection module 7 determines that the power distribution side voltage is too high, the voltage detection module 7 de-energizes the coil 2, and the main contact assembly 5 is disconnected to protect the load. The current detection diagnosis process is as follows, when the current detection data exceeds the preset current range, the current detection module 9 judges that the current at the load side is too high, the current detection module 9 cuts off the power of the coil 2, and the main contact assembly 5 is disconnected so as to protect the load.
In a preferred embodiment, as shown in fig. 1 and 2, the contactor is provided with a communication module 6, data interaction is performed with external equipment through the communication module 6, the self-diagnosis module 8, the voltage detection module 7 and the current detection module 9 are all connected to the communication module 6, the communication module 6 adopts a 485 communication or CAN communication mode, and all detection data CAN be transmitted to a user through the communication module 6.
Further, as shown in fig. 3, the communication module 6 receives the detection data of the voltage detection module 7 and the current detection module 9, calculates power detection data according to the voltage detection data and the current detection data, and when the power detection data exceeds a preset power range, the communication module 6 powers off the coil 2.
The protection action of the contactor is uniformly controlled by the communication module, the control switch 15 is connected between the wire inlet end of the contactor and the coil in series, the control switch 15 is connected with the communication module 6, the communication module 6 switches the switching state of the control switch 15 to electrify or cut off the coil 2, namely when any one of the self-diagnosis module 8, the voltage detection module 7 and the current detection module 9 judges that the coil 2 needs to be cut off for loop protection, the communication module 6 cuts off the control switch 15.
In addition, the communication module 6 is connected with a display screen 11, and the display screen 11 can display and retrieve the operation parameters such as the actual distance Ln of the main contact assembly 5, the actual temperature Tn of the coil 2, the current, the voltage, the power and the like for the user to identify. The user can check and analyze the contactor state and the load running state according to the detection data, when a fault that a loop needs to be disconnected occurs, the communication module 6 outputs a disconnection signal to the control switch 15, and the control switch 15 is disconnected to disconnect the coil 2, so that the contactor and the load are protected.
The utility model also provides electric equipment for connecting or disconnecting the power supply by the contactor, wherein the electric equipment can be an air conditioner or a refrigerator and the like, the inlet wire end of the contactor is connected with three-phase electricity, and the outlet wire end of the contactor is connected with loads such as a compressor, a motor and the like.
The contactor of the utility model not only can realize the detection and protection functions of the current, the voltage, the power and the like of the load, but also has the functions of communication, display and self diagnosis, integrates multiple functions, greatly reduces the configuration of multiple devices in the traditional technology, reduces the cost and has simple and reliable control logic.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (12)
1. From taking protect function's contactor, its characterized in that includes:
each main contact component comprises a moving contact and a fixed contact, and the main contact component is provided with a position sensor for detecting the actual distance Ln between the moving contact and the fixed contact;
the coil is switched to be in a switching state by electrifying or powering off the coil, and a temperature detection device for detecting the actual temperature Tn of the coil is installed on the coil;
and the self-diagnosis module receives detection data of the position sensor and the temperature detection device and judges the state of the contactor.
2. The contactor according to claim 1, wherein the self-diagnosis module de-energizes the coil when a difference al of the actual distance Ln from an initial distance L exceeds a preset range;
and/or when the actual temperature Tn of the coil exceeds the set alarm temperature Tc, the self-diagnosis module sends an alarm signal outwards;
and/or the self-diagnostic module de-energizes the coil when the actual temperature Tn of the coil exceeds a maximum limit temperature T.
3. The contactor as claimed in claim 1, further comprising: and the electrical detection module is used for detecting the electrical operation parameters of the wire inlet end and the wire outlet end of the contactor.
4. The contactor according to claim 3, wherein said electrical detection module comprises: the contactor comprises a voltage sampling device arranged at the wire inlet end of the contactor, a voltage detection module for converting the detection signal of the voltage sampling device into voltage detection data, a current sampling device arranged at the wire outlet end of the contactor, and a current detection module for converting the detection signal of the current sampling device into current detection data.
5. The contactor according to claim 4, wherein said voltage detection module de-energizes said coil when said voltage detection data exceeds a preset voltage range;
and/or when the current detection data exceeds a preset current range, the current detection module cuts off the power of the coil.
6. The contactor as claimed in claim 4, further comprising: and the self-diagnosis module, the voltage detection module and the current detection module are all connected to the communication module.
7. The contactor according to claim 6, wherein said communication module receives detection data of said voltage detection module and said current detection module, calculates power detection data according to said voltage detection data and said current detection data, and de-energizes said coil when said power detection data exceeds a predetermined power range.
8. The contactor according to claim 6, wherein a control switch is connected in series between the inlet end of the contactor and the coil, the control switch is connected with the communication module, and the communication module switches the switching state of the control switch to energize or de-energize the coil.
9. The contactor as claimed in claim 6, further comprising: and the display device is connected with the communication module.
10. The contactor according to any of claims 1 to 9, wherein the inlet and outlet terminals of the contactor are each fitted with a power terminal for wiring.
11. An electric device characterized in that the electric device is connected to or disconnected from a power source through the contactor of any one of claims 1 to 10.
12. The electric device according to claim 11, wherein the electric device is a refrigerator or an air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121988115.8U CN215527597U (en) | 2021-08-23 | 2021-08-23 | Contactor with protection function and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121988115.8U CN215527597U (en) | 2021-08-23 | 2021-08-23 | Contactor with protection function and electric equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215527597U true CN215527597U (en) | 2022-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121988115.8U Active CN215527597U (en) | 2021-08-23 | 2021-08-23 | Contactor with protection function and electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215527597U (en) |
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2021
- 2021-08-23 CN CN202121988115.8U patent/CN215527597U/en active Active
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