CN-121995825-A - Control cabinet button type switch control module and method

CN121995825ACN 121995825 ACN121995825 ACN 121995825ACN-121995825-A

Abstract

The invention relates to the technical field of control, in particular to a control cabinet button type switch control module and a control method, wherein the control cabinet button type switch control module comprises a normally-open normally-closed relay, at least two relays and a control unit, the control unit is used for controlling the switching of the relays, the normally-open normally-closed relay is externally provided with two interfaces, the two interfaces are in a conducting state through normally-closed contacts in an initial state, at least two relays are respectively externally provided with an interface, the relays are respectively connected with the normally-open contacts of the normally-open normally-closed relay through the normally-open contacts, a power supply and a communication interface are further arranged, a control source switch is arranged between the power supply and the control unit to control the switching of the normally-open normally-closed relay, and the control module access scheme comprises a common button and a common knob of a control cabinet door.

Inventors

CHEN PENGTAO
TAN YECHENG
QU XINDUI

Assignees

青岛飞奕科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260127

Claims (7)

1. A button switch control module of a control cabinet is characterized by comprising a normally-open normally-closed relay, at least two relays and a control unit, wherein the control unit is used for controlling the opening and closing of the relays, the normally-open normally-closed relay is externally provided with two interfaces, the two interfaces are in a conducting state through normally-closed contacts in an initial state, the at least two relays are respectively externally provided with one interface, the relays are respectively connected with the normally-open contacts of the normally-open normally-closed relay through the normally-open contacts of the relays, and a power supply and a communication interface are further arranged, and a control source switch is arranged between the control unit and the control unit to control the opening and closing of the normally-open normally-closed relay.
2. A control cabinet button switch control module as defined in claim 1, wherein said relays further have normally closed contacts, wherein the normally closed contacts of one relay are respectively connected in series with the coils corresponding to the rest of said relays, said normally closed contacts of the relays are initially in a closed state and said relay coils and said control unit are in an energized state.
3. The control cabinet button type switch control module is characterized by comprising at least one normally open relay K1, at least one normally closed relay K2 and a control unit, wherein the control unit is used for controlling the normally open relay K1 and the normally closed relay K2 to be opened and closed, the normally open relay K1 and the normally closed relay K2 are respectively led out of two interfaces for being connected with a button switch, and a power supply and a communication interface are further arranged, and a control source change-over switch is arranged between the power supply and the control unit so as to control the start and stop of the control unit.
4. A control cabinet button switch control module as defined in any one of claims 1-3, wherein said control unit is a micro-control unit.
5. A control cabinet push button switch control module as defined in any of claims 1-3, wherein said power and communication interface communicates with an upper group control system based on Homebus communication protocols.
6. A method of operating a control cabinet button switch control module according to any one of claims 1-2, comprising the steps of: when the switch-in control is performed, a circuit at the input end of the knob is disconnected, and a power supply is connected to one interface of a normally-closed contact of a normally-open normally-closed relay, and the other interface is connected with the input end of the knob; The control source change-over switch is rotated to enable the normally-open normally-closed relay to be electrified, current flows to a normally-open contact of the relay, at the moment, conduction of a corresponding line can be controlled through the control unit and the relay, the control source change-over switch is rotated to enable the normally-open normally-closed relay to be powered off, the relay and the normally-open normally-closed relay contact are in default states, and at the moment, equipment can be controlled through a knob.
7. A method of operating a control cabinet push button switch control module as set forth in claim 3, including the steps of: When the control module is connected, the normally open relay K1 is connected in parallel with a start button of the control cabinet, and the normally closed relay K2 is connected in series with a stop button of the control cabinet; the control unit, the normally open relay K1 and the normally closed relay K2 are powered on by rotating the control source change-over switch, the normally open relay K1 and the normally closed relay K2 are controlled by the control unit to act, and then starting or stopping of equipment is achieved, the control unit, the normally open relay K1 and the normally closed relay K2 are powered off by rotating the control source change-over switch, at the moment, the normally open relay K1 is kept to be opened, the normally closed relay K2 is kept to be closed, and the equipment can be started and stopped by controlling cabinet door buttons of the control cabinet.

Description

Control cabinet button type switch control module and method Technical Field The invention relates to the technical field of control, in particular to a control cabinet button type switch control module and a control method. Background In the heating and ventilation machine room reconstruction project, various heating and ventilation equipment control cabinets are required to be connected into a group control system. However, due to the changes of field use demands, equipment upgrading and reconstruction and the like, the inside of the control cabinet is often subjected to multiple reconstruction and adjustment. After multiple transformation, the actual circuit arrangement in the control cabinet is seriously inconsistent with the original designed drawing in the cabinet, and a professional electric person is required to re-smoothen the circuit to give an access scheme, so that great difficulty is caused to access a new system, and the use requirement of on-site quick response cannot be met. For this purpose, a mode of directly accessing control through a cabinet door knob type switch (a button and a knob) can be adopted, so that the complicated process of re-wire arrangement is avoided. However, the above-mentioned direct access mode has a potential safety hazard, and the mode can directly deprive the control right of the original button and knob of the cabinet door of the control cabinet, and completely deliver the control right to the newly added control system for control. When the new system has abnormal faults, the original button and knob control functions of the cabinet door of the control cabinet are completely disabled, emergency control on field equipment cannot be realized, normal operation of a group control field is seriously affected, and even safety accidents can be possibly caused. Disclosure of Invention The invention aims to provide a control cabinet button type switch control module and a control cabinet button type switch control method, which are used for solving the problems in the prior art. In order to achieve the above object, the present invention solves the following problems by the following technical scheme: The invention provides a control cabinet button type switch control module which comprises a normally-open normally-closed relay, at least two relays and a control unit, wherein the control unit is used for controlling the on-off of the relays, the normally-open normally-closed relay is externally provided with two interfaces, the two interfaces are in a conducting state through normally-closed contacts in an initial state, the at least two relays are respectively externally provided with an interface, the relays are respectively connected with the normally-open contacts of the normally-open normally-closed relay through the normally-open contacts of the relays, and a power supply and a communication interface are further arranged, and a control source switch is arranged between the control unit and the control unit to control the on-off of the normally-open normally-closed relay. As a further technical scheme, the relays are also provided with normally closed contacts, wherein the normally closed contacts of one relay are respectively connected with the coils corresponding to the rest of the relays in series, the normally closed contacts of the relays are initially in a closed state, and the coils of the relays and the control unit are in an electric power obtaining state. The invention provides a control cabinet button type switch control module which comprises at least one normally open relay K1, at least one normally closed relay K2 and a control unit, wherein the control unit is used for controlling the normally open relay K1 and the normally closed relay K2 to be opened and closed, the normally open relay K1 and the normally closed relay K2 are respectively led out of two interfaces for being connected with a button type switch, and a power supply and a communication interface are further arranged, and a control source change-over switch is arranged between the power supply and the control unit so as to control the start and stop of the control unit. As a further technical scheme, the control unit is a micro control unit. As a further technical scheme, the power supply and the communication interface communicate with the superior group control system based on Homebus communication protocols. In a third aspect, the present invention provides a method for operating a control cabinet button switch control module according to the first aspect, comprising the steps of: when the switch-in control is performed, a circuit at the input end of the knob is disconnected, and a power supply is connected to one interface of a normally-closed contact of a normally-open normally-closed relay, and the other interface is connected with the input end of the knob; The control source change-over switch is rotated to enable the normally-open normally-closed relay to be electrified, current