CN-224217452-U - Shunt release, power supply and air conditioner

CN224217452UCN 224217452 UCN224217452 UCN 224217452UCN-224217452-U

Abstract

The utility model discloses a shunt release, which comprises a release mechanism, a driving coil, an auxiliary contact, a first switching contact, a second switching contact and a switching control circuit, wherein the release mechanism is movably arranged in the shunt release, the driving coil activates a magnetic field to drive the release mechanism to move a breaking circuit breaker when the driving coil is electrified, the auxiliary contact comprises a common contact, the common contact is electrically connected with a power supply source, one path of the first switching contact is electrically connected with the driving coil, the other path of the first switching contact is connected with a first detection terminal, the second switching contact is connected with the second detection terminal, when a power supply loop of the driving coil is conducted, the common contact is connected with the first switching contact to output a breaking state detection signal through the first detection terminal, and when the power supply loop of the driving coil is not conducted, the common contact is connected with the second switching contact to output a closing state detection signal through the second detection terminal. The utility model also discloses a power supply and an air conditioner, which can provide clear feedback of the opening and closing states and improve the safety and maintainability of the system.

Inventors

XU PENGYANG
HE CHENGJUN
WANG ZHIYI
LIU ZHONGQIANG
WANG MING

Assignees

青岛海信日立空调系统有限公司

Dates

Publication Date: 20260508
Application Date: 20250326

Claims (10)

1. A shunt release, comprising: A trip mechanism movably disposed in the shunt trip; A driving coil which activates a magnetic field to drive the trip mechanism to move the breaking circuit breaker when energized; characterized by further comprising: an auxiliary contact, comprising: a common contact electrically connected to a power supply; One path of the first switching contact is electrically connected with the driving coil, and the other path of the first switching contact is connected with a first detection terminal; a second switching contact connected to the second detection terminal; When the power supply loop of the driving coil is not conducted, the common contact is connected with the second switching contact so as to output a closing state detection signal through the second detection terminal.
2. The shunt release according to claim 1, wherein, Further comprises: A first connection terminal having one end connected to the driving coil and the other end connected to the control unit, and And the second wiring terminal is connected with a power supply.
3. The shunt release according to claim 2, wherein, The control unit includes: One end of a group of normally open contacts of the relay is connected with the driving coil through the first wiring terminal, and the other end of the normally open contacts of the relay is grounded; The control unit receives a circuit breaking control signal, a relay coil of the relay is electrified, a normally open contact of the relay is closed, and a power supply loop of the driving coil is conducted through the first wiring terminal and the second wiring terminal.
4. The shunt release according to claim 3, wherein, The control unit further includes: The amplifying circuit at least comprises a transistor, wherein a control end of the transistor receives the open-circuit control signal, one end of a switch passage of the transistor is connected with the relay coil, the other end of the switch passage of the transistor is grounded, when the switch passage of the transistor is closed, the relay coil of the relay is electrified, a normally open contact of the relay is closed, and a power supply loop of the driving coil is conducted through the first connecting terminal and the second connecting terminal.
5. The shunt release of claim 4, wherein, The control unit further includes: And the output end of the redundancy protection circuit is connected with the input end of the amplifying circuit, and the redundancy protection circuit comprises: a first input terminal for inputting a hardware protection signal; a second input for inputting a software protection signal; The redundancy protection circuit is configured to output a shutdown protection signal to an input of the amplifying circuit when the hardware protection signal is input to the first input terminal or the software protection signal is input to the second input terminal.
6. The shunt release according to any one of claims 2 to 5, further comprising: A detection unit, comprising: And the first detection circuit is electrically connected with the first detection terminal and is configured to sample a switching-off state detection signal through the first photoelectric coupler.
7. The shunt release according to any one of claims 2 to 5, further comprising: A detection unit, comprising: And the second detection circuit is electrically connected with the second detection terminal and is configured to sample a closing state detection signal through a second photoelectric coupler.
8. The shunt release of any one of claims 2 to 5, wherein the power supply is a dc power supply or an ac power supply.
9. A power supply, comprising: A circuit breaker for breaking a current; a shunt release, comprising: A trip mechanism movably disposed in the shunt trip; A driving coil which activates a magnetic field to drive the tripping mechanism to act to break the circuit breaker when the driving coil is electrified; The shunt release is characterized by further comprising: an auxiliary contact, comprising: a common contact electrically connected to a power supply; One path of the first switching contact is electrically connected with the driving coil, and the other path of the first switching contact is connected with a first detection terminal; a second switching contact connected to the second detection terminal; A control unit for receiving a breaking control signal to drive a power supply loop for conducting the driving coil; The detection unit is used for collecting a switching-off state detection signal through the first detection terminal when the power supply loop of the driving coil is conducted, or collecting a switching-on state detection signal through the second detection terminal when the power supply loop of the driving coil is not conducted.
10. An air conditioner comprising the power supply according to claim 9, further comprising And the protection device is used for generating the circuit breaking control signal.

Description

Shunt release, power supply and air conditioner Technical Field The utility model relates to the technical field of power supplies, in particular to a shunt release, a power supply and an air conditioner. Background The shunt release is a power supply protection device and is used for remotely controlling a breaker or other switching equipment in an electrical system so as to cut off a power supply to protect the equipment from safe operation when overload, short circuit or other abnormal conditions of the electrical equipment occur. From a principle perspective, the shunt release includes a control unit, where the control unit is configured to receive a control signal from a remote control end (e.g., a control room or other automation system) and further drive an actuator to act, so as to convert an electrical signal into a mechanical action to enable contacts of the circuit breaker to open or close, and to cut off or conduct a power circuit. The actuator may be an electric actuator or a pneumatic actuator. However, the feedback mechanism of the shunt release is not perfect, and a user cannot know what state the shunt release is in under the current state. The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art. Disclosure of utility model Aiming at the problem that the feedback mechanism of the shunt release is imperfect, a user can not know what state the shunt release is in the current state, and the first aspect of the application designs and provides the shunt release. The shunt release comprises a release mechanism, a driving coil, an auxiliary contact, a first switching contact and a second switching contact, wherein the release mechanism is movably arranged in the shunt release, the driving coil activates a magnetic field to drive the release mechanism to move a breaking circuit breaker when the driving coil is electrified, the auxiliary contact comprises a common contact, one path of the first switching contact is electrically connected with the driving coil, the other path of the first switching contact is connected with a first detection terminal, the second switching contact is connected with a second detection terminal, when a power supply loop of the driving coil is conducted, the common contact is connected with the first switching contact to output a switching-off state detection signal through the first detection terminal, and when the power supply loop of the driving coil is not conducted, the common contact is connected with the second switching contact to output a switching-on state detection signal through the second detection terminal. The technical scheme has the advantages that the real-time monitoring of the state of the shunt release is realized through the cooperation of the auxiliary contact, the first detection terminal and the second detection terminal, and the detection signal can be automatically switched when the power supply state of the driving coil changes, so that clear feedback of the opening and closing states is provided, and the safety and maintainability of the system are improved. In some embodiments of the application, the shunt release further comprises a first wiring terminal, one end of the first wiring terminal is connected with the driving coil, the other end of the first wiring terminal is connected with the control unit, and a second wiring terminal is connected with a power supply. The technical scheme has the advantages that the control unit and the power supply are connected through the first wiring terminal and the second wiring terminal respectively, so that the control unit and the power supply are convenient to connect with different control components, and the flexibility of the shunt release is improved. In some embodiments of the application, the control unit comprises a relay, one end of a group of normally open contacts of the relay is connected with the driving coil through the first wiring terminal, the other end of the normally open contacts of the relay is grounded, the control unit receives a breaking control signal, the relay coil of the relay is electrified, the normally open contacts of the relay are closed, and a power supply loop of the driving coil is conducted through the first wiring terminal and the second wiring terminal. The technical scheme has the advantages that the relay provides electrical isolation between the open-circuit control signal and the shunt release, high voltage or strong current is prevented from directly affecting the control end for controlling generation of the open-circuit control signal, and the relay can rapidly switch to ensure timely response to the detected faults. In some embodiments of the application, the control unit further comprises an amplifying circuit, wherein the amplifying circuit at least comprises a