Power supply control box for multi-air-conditioning system of aircraft

Abstract

The utility model relates to the field of circuit control, and provides a power supply control box for a multi-air-conditioning system of an aircraft. The control circuit comprises a master control circuit and a plurality of slave control circuits, and the master control circuit is sequentially connected with the plurality of slave control circuits in series; during starting, each unit can be started and run in sequence, so that instantaneous impact on a power grid during simultaneous starting is avoided; a coil of a main contactor of a slave control circuit is reset and instantly connected to a power supply through a reset button, and a time delay relay of a previous-stage control circuit is utilized, so that the slave machine independently works when the host machine does not work; a control button and a reset button of each slave control circuit can be mounted in a power supply control box of a main cab or mounted in each cabin, so that the operation of personnel is facilitated; through integration of the control box, simultaneous control and monitoring of a plurality of devices are realized.

Description

Technical Field

[0001] The utility model relates to the field of circuit control, in particular to a power control box for a multi-air conditioning system of an aircraft. Background Art

[0002] Multiple air conditioning systems are provided on a helicopter or an aircraft. Taking a bomber as an example, there are multiple cabins such as a cockpit, an observation cabin, and a shooting cabin. An air conditioning unit needs to be installed in each cabin, and each air conditioning unit is generally controlled by a power control box installed in the cab.

[0003] Multiple sets of air conditioning equipment are in independent working spaces. The working environments of the independent spaces are different, and their working states are not smoothly communicated with each other. Usually, after the host machine works, the slave machine control power is controlled by the host machine. After the host machine works, the slave machine automatically enters the working state. After the host machine is turned off, the slave machine correspondingly shuts down. If the air conditioning systems in multiple cabins are turned on and work simultaneously, the instantaneous load is large, which will impact the power system of the aircraft and affect the normal operation of the system. If any slave machine needs to work independently, it needs to be independently controlled, and its working state is difficult to monitor. When the air conditioning system in some cabins, especially the cockpit, is turned off, the air conditioning systems in other cabins need to be able to work independently to ensure that the personnel are in the best state. Summary of the Invention

[0004] In order to solve the problems of power control and instantaneous power consumption impact when multiple air conditioning systems work, the purpose of the utility model is to provide a power control box for a multi-air conditioning system of an aircraft.

[0005] The technical solution adopted by the utility model is as follows:

[0006] An aircraft multi-air conditioning system power control box, comprising a control box body, on which a plurality of control buttons and LED display lights are installed. A control circuit board is installed inside the box body, and the control circuit board is connected with a power cable. The power cable passes out of the box body and is connected to an airborne DC power supply; control elements are installed on the control circuit board, and each of the control elements is electrically connected to the control button, the power cable and the LED display light to form a control circuit; the control circuit includes a main control circuit and a plurality of slave control circuits, and the main control circuit is sequentially connected in series with the plurality of slave control short circuits; both the main control circuit and the slave control circuit include a main contactor, a relay and a time-delay relay; the coils of each of the main contactors are respectively directly conducted with the power cable through the corresponding control button or conducted with the power cable through the upper-level control circuit; a set of contacts of each of the main contactors are respectively connected to the power cable and the main load of the corresponding cockpit. The coils of each of the relays are connected to the contacts of the main contactor of the same control circuit that connect the main load. A set of contacts of each of the relays are respectively connected to the contacts of the main contactor of the same control circuit corresponding to the main load and the slave load corresponding to the control circuit; the time-delay relay is a double-group conversion relay, the coils of each time-delay relay are connected to the power cable, the first set of contacts of the time-delay relay are respectively connected to the contacts of the relay corresponding to the slave load and the corresponding LED display light, and the second set of contacts of the time-delay relay are respectively connected to the contacts of the relay corresponding to the slave load of the same control circuit and the control button corresponding to the next set of control circuits; the coil of the main contactor of the main control circuit forms a loop with the power cable through the corresponding control button, and the coils of the main contactors of each of the slave control circuits are connected to one of the contacts of the second set of contacts of the time-delay relay of the upper-level control circuit through the corresponding control button.

[0007] Further, each of the slave control circuits is respectively connected with a reset button. One end of the reset button is connected to the power cable, and the other end of the reset button is connected to the coil of the corresponding main contactor.

[0008] Further, the reset button is an elastic reset button.

[0009] Further, a diode is installed between the contacts of the main contactor of the slave control circuit and the contacts of the time-delay relay of the upper-level control circuit. The current flows from the main contactor to the time-delay relay and from the time-delay relay to the coil of the main contactor through the contact button.

[0010] Further, a diode is installed between the relay contacts and the contacts of the corresponding time-delay relay, and the current flows from the relay to the time-delay relay.

[0011] Further, the contacts of each of the main contactors are connected to the same DC power supply through the power cable, or are respectively connected to different DC power supplies.

[0012] After adopting the above technical solutions, the beneficial effects of the present utility model are as follows: By leading out the LED indicator lights on a pair of contacts of the time-delay relay to monitor the working conditions of each individual control circuit, the operation conditions of each system can be understood. By connecting the main control circuit and each slave control circuit in series in sequence through the time-delay relay, when starting up, each unit can start up and operate in sequence, avoiding the instantaneous impact on the power grid when starting up simultaneously. And by using the reset button to instantaneously connect the power supply when the coil of the main contactor of the slave control circuit is reset, and using the time-delay relay of the upper-level control circuit, the slave machine can work independently when the host machine is not working. The control buttons and reset buttons of each slave control circuit can be installed in the power control box of the main cab or in each cabin, which is convenient for personnel to operate. Through the integration of the control box, multiple devices can be controlled and monitored simultaneously. Brief Description of the Drawings

[0013] Figure 1 It is the circuit schematic diagram of the present utility model.

[0014] In the figure: power supply cable 1, main control circuit 2, main contactor 21, relay 22, time-delay relay 23, main load device 24, slave load device 25, control button 26, diode 27, diode 28, first slave control circuit 3, main contactor 31, relay 32, time-delay relay 33, main load 34, slave load 35, control button 36, second slave control circuit 4, main contactor 41, reset button 5. Detailed Description of the Preferred Embodiment

[0015] The following further details the specific embodiments of the present utility model with reference to the accompanying drawings. The present utility model takes an aircraft with three air-conditioning systems as an example.

[0016] As Figure 1 shown, a power control box for a multi-air-conditioning system of an aircraft includes a control box body. Three control buttons are installed on the box body, and LED display lights are respectively installed at the bottoms of the control buttons. A control circuit board is installed inside the box body. The control circuit board is connected to a power supply cable 1, and the power supply cable 1 passes through the box body and is connected to the airborne DC power supply; control elements are installed on the control circuit board, and the control elements are electrically connected to the control buttons, the power supply cable 1, and the LED display lights to form a control circuit.

[0017] The control circuit of this technical solution includes a main control circuit 2 and two slave control circuits 3, 4, which respectively correspond to the control of the air-conditioning systems in the cockpit and the other two cabins. The main control circuit 1 is connected in series with the two slave control circuits 3, 4 in sequence. The main control circuit 2 is connected to the first slave control circuit 3, and the first slave control circuit 3 is connected to the second slave control circuit 4.

[0018] Both the main control circuit and the slave control circuit include three types of components: a main contactor, a relay, and a time-delay relay. One contact C1 of the main contactor 21 in the main control circuit 2 is connected to a DC power input through a power cable, and the other contact C2 is connected to the main load 24 of the corresponding circuit; the contact C2 is simultaneously connected to the coil of the corresponding relay 22 and one of the contacts C3 of the relay 22. The other contact C4 of the relay 22 is connected to the slave load 25 device. The main load device 24 is generally a device such as a compressor, and the slave load device 25 is generally a fan and other devices of the air-conditioning system. The coil of the main contactor 21 is connected to the DC input through the corresponding control button 26 and a power cable. When the control button 26 is turned on, the coil of the main contactor 21 is energized and the contacts C1 and C2 are conducted. The direct current powers the main load 24 through the main contactor 21, and at the same time powers the coil and the contact C3 of the relay 22. After the relay 22 coil is energized, the contacts C3 and C4 are conducted, and the direct current input from the main contactor 21 powers the slave load device 25 through the relay 22. The time-delay relay 23 is a double-group contact contactor and has a time-delay function at the same time. The coil of the time-delay relay 23 is directly connected to the DC power supply through a cable. One group of contacts of the time-delay relay 23 is C5 and C6, and the other group of contacts is C7 and C8. The contact C5 is conducted to the contact C4 through the diode 27. The relay 22 powers the time-delay relay 23 through the contact C4. The contact C6 is connected to the control button 36 of the first slave control circuit 3 and powers the coil of the main contactor 31 of the first slave control circuit 3 through the control button 36. The contacts C7 and C8 are connected to the corresponding LED display, etc., to display the working status of the corresponding unit. The contact C7 is connected to the contact C4, so as to display the power-on situation in the control circuit.

[0019] The connection methods of the main contactor 31, the relay 32, and the time-delay relay 33 in the first slave control circuit 3 are the same as those in the main control circuit. The upper-level control circuit supplies power to the coil of the main contactor of the lower-level control circuit with a time delay through the time-delay relay, so that the multi-level control circuit can be started up in sequence at a certain time interval, avoiding the impact generated when starting up at the same time. The time-delay relay in this application is a common model on the market at present. Its time-delay function is used, and its delay principle and so on will not be elaborated.

[0020] To achieve independent control of three air-conditioning units, reset buttons 5 are respectively provided on two slave control circuits. Taking the first slave control circuit 3 as an example: one end of the reset button 5 is connected to the DC power input, and the other end of the reset button 5 is connected to the coil of the main contactor 31 of the first slave control circuit 3. The reset button 5 is a spring-type button. When the main control circuit is turned off (the corresponding control button is disconnected), by pressing the reset button 5, the coil of the corresponding main contactor 31 of the first slave control circuit 3 is instantly powered on, conducting the contacts C9 and C10 of the main contactor 31. The contact C9 is connected to the coil of the main contactor 31 through the diode 28, the contacts C5, C6, and the control button 36, and keeps it powered on, thus maintaining the conduction of the contacts C9 and C10, so as to supply power to the main load 34, the slave load 35 corresponding to this control circuit, and the coil of the main contactor 41 of the next-level control circuit. It is realized that in the state where the main control circuit 1 loses power and shuts down, the air-conditioning systems in other cabins can work independently. The reset button can be installed in the corresponding cabin for easy operation by personnel.

[0021] The DC power input after this technical solution comes from the same airborne DC power supply device. The three control circuits can also be individually connected to their respective independent DC power inputs through cables.

Claims

1. A power control box for a multi-air conditioning system of an aircraft, comprising a control box body, on which a plurality of control buttons and LED display lights are installed, a control circuit board is installed inside the box body, the control circuit board is connected with a power cable, and the power cable passes out of the box body and is connected with an airborne DC power supply; control elements are installed on the control circuit board, and each of the control elements is electrically connected with the control buttons, the power cable and the LED display lights to form a control circuit; characterized in that, The control circuit includes a main control circuit and a plurality of slave control circuits, and the main control circuit is connected in series with the plurality of slave control circuits in sequence; both the main control circuit and the slave control circuits include a main contactor, a relay, and a time-delay relay; the coils of the main contactors are respectively directly connected to the power cable through corresponding control buttons or connected to the power cable through the upper-level control circuit; one set of contacts of each of the main contactors are respectively connected to the power cable and the main load of the corresponding cockpit, the coils of the relays are connected to the contacts of the main contactor of the same control circuit that connect to the main load, and one set of contacts of each of the relays are respectively connected to the contacts of the main contactor of the same control circuit corresponding to the main load and the slave load corresponding to the control circuit; the time-delay relay is a double-group conversion relay, the coils of the time-delay relays are connected to the power cable, the first set of contacts of the time-delay relays are respectively connected to the contacts of the relays corresponding to the slave load and the corresponding LED display lights, and the second set of contacts of the time-delay relays are respectively connected to the contacts of the relays corresponding to the slave load of the same control circuit and the control button corresponding to the next set of control circuits; the coil of the main contactor of the main control circuit forms a loop with the power cable through the corresponding control button, and the coils of the main contactors of the slave control circuits are respectively connected to one of the contacts of the second set of contacts of the time-delay relays of the upper-level control circuit through the corresponding control buttons.

2. The power control box of a multi-air conditioner system for an aircraft according to claim 1, characterized in that Each of the slave control circuits is respectively connected with a reset button, one end of the reset button is connected to the power cable, and the other end of the reset button is connected to the coil of the corresponding main contactor.

3. The power control box of a multi-air conditioner system for an aircraft according to claim 2, characterized in that The reset button is an elastic reset button.

4. The power control box of a multi-air conditioner system for an aircraft according to claim 3, characterized in that, A diode is installed between the contacts of the main contactor of the slave control circuit and the contacts of the time-delay relay of the upper-level control circuit, and the current flows from the main contactor to the time-delay relay and is supplied from the time-delay relay to the coil of the main contactor through the contact button.

5. The power control box of a multi-air conditioner system for an aircraft according to claim 1, characterized in that, A diode is installed between the contacts of the relay and the contacts of the corresponding time-delay relay, and the current flows from the relay to the time-delay relay.

6. The power control box of a multi-air conditioner system for an aircraft according to claim 1, characterized in that, The contacts of each of the main contactors are connected to the same DC power supply through the power cable, or are respectively connected to different DC power supplies.

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