Marine refrigerant leakage alarm control circuit

Abstract

The utility model relates to a marine refrigerant leakage alarm control circuit, which is characterized in that a live wire of an AC220V power supply passes through a first fuse, is divided into a plurality of groups of area alarm lines and a public signal line, and then is connected back to a null line of the AC220V power supply through a second fuse, the area alarm lines are sequentially connected with an area leakage sensor normally open switch and an area leakage relay in series, and the area leakage sensor normally open switch is connected with the area leakage relay. The area leakage relay is connected with an area leakage indicating lamp in parallel, the public signal line is divided into multiple paths to be connected in parallel after passing through the public signal relay, the multiple paths are respectively provided with a plurality of area leakage relay normally-open switches of multiple sets of area alarm lines, and the public signal relay is connected with an external alarm or display device. The public signal relay is connected with a buzzing circuit in parallel, and the buzzing circuit is sequentially connected with a silencing self-locking button and a buzzer in series. The structure is simple, and area leakage can be automatically displayed and alarmed.

Description

Technical Field

[0001] This utility model relates to an alarm circuit, specifically a marine refrigerant leak alarm control circuit. Background Technology

[0002] Ships have numerous refrigeration units, resulting in a large number of devices and pipelines containing refrigerant. During actual use, these devices and pipelines may become damaged due to prolonged use or expansion, leading to refrigerant leaks. This necessitates that the crew accurately understand the refrigerant leak situation in the relevant areas to pinpoint the cause and resolve the problem. Traditional methods for addressing refrigerant leaks in specific areas require personnel to conduct a comprehensive search of all areas, which is time-consuming and labor-intensive. Summary of the Invention

[0003] This invention provides a simple marine refrigerant leak alarm control circuit that can automatically display and alarm the area of ​​leakage.

[0004] The technical solution adopted by this utility model is: a marine refrigerant leak alarm control circuit, including an AC220V power supply, characterized in that: the AC220V power supply live wire is connected in parallel to multiple groups of area alarm lines and a common signal line after passing through a first fuse, and then connected back to the AC220V power supply neutral line through a second fuse; a normally open switch of an area leak sensor and an area leak relay are connected in series in the area alarm line, and an area leak indicator light is connected in parallel to the area leak relay; the common signal line is connected in parallel to multiple lines after passing through a common signal relay, and multiple normally open switches of multiple area leak relays for multiple groups of area alarm lines are set on each of the multiple lines; the common signal relay is connected to an external alarm or display device; a buzzer line is connected in parallel to the common signal relay, and a silencer self-locking button and a buzzer are connected in series in the buzzer line.

[0005] The silencer self-locking button is connected in parallel with a first maintenance line, and the buzzer is connected in parallel with a second maintenance line. A maintenance relay is installed on the second maintenance line. The first maintenance line is split into multiple lines after passing through the normally closed de-energized delay closing switch of the maintenance relay. Each of the multiple lines is equipped with a normally open energized delay closing switch of a regional leakage relay for a regional alarm line.

[0006] In operation, leakage signals from area leakage sensors installed in multiple zones are sent to the controller, which then closes the normally open switch of the corresponding area leakage sensor on the alarm line. This activates the corresponding area alarm line, energizing the area leakage relay and illuminating its indicator light. This, in turn, closes the normally open switch of the corresponding area leakage relay on the common signal line. At this time, the silencer / locking button is closed, activating the common signal line. The common signal relay is then energized, triggering an external alarm signal and a buzzer. After personnel have completed maintenance in the areas indicated by the illuminated indicator lights, the area leakage relay... When the normally open switch of the leakage sensor in the control area disconnects the area alarm circuit, the indicator light goes out and the buzzer is silenced. If the personnel press the silencer self-locking button first, and the button does not reset, the buzzer circuit is disconnected, the buzzer is silenced, and the leakage area is forgotten to be inspected. After the maintenance relay on the second maintenance circuit loses power and delays, the normally closed switch of the maintenance relay closes. After the normally open switch of the area leakage relay gains power and delays, the first maintenance circuit is connected, thereby reconnecting the buzzer circuit and the common signal relay, and the buzzer sounds again to remind of the leakage, effectively improving operational reliability and preventing missed maintenance. Attached Figure Description

[0007] Figure 1 This is the circuit diagram of this utility model.

[0008] In the diagram: Power supply 1, First fuse 2, Second fuse 3, First zone alarm circuit 4, Second zone alarm circuit 5, Third zone alarm circuit 6, Common signal circuit 7, Buzzer circuit 8, First zone leakage sensor normally open switch BJ1, First zone leakage relay KA1, First zone leakage relay normally open switch KA1-1, First zone leakage relay normally open energized delay closing switch KA1-2, First leakage indicator HL1, Second zone leakage sensor normally open switch BJ2, Second zone leakage relay KA2, Second zone leakage relay normally open switch KA2-1, Second zone leakage relay normally open energized delay closing switch KA2-2, Second leakage indicator HL2, Third zone leakage sensor normally open switch BJ3, Third zone leakage relay KA3, Third zone leakage relay normally open switch KA3-1, Third zone leakage relay normally open energized delay closing switch KA3-2, Common signal relay KA4, Third leakage indicator HL3, Silent self-locking button SB, Buzzer HA, Maintenance relay KA5, Maintenance relay normally closed de-energized delay closing switch KA5-1. Detailed Implementation

[0009] The following explanation, in conjunction with the accompanying drawings, will provide further details.

[0010] Figure 1As shown: A marine refrigerant leak alarm control circuit includes an AC220V power supply 1. The live wire of the power supply 1 is connected in parallel to the first zone alarm line 4, the second zone alarm line 5, the third zone alarm line 6, and the common signal line 7 after passing through the first fuse 2, and then connected back to the neutral wire of the power supply 1 through the second fuse 3.

[0011] The first zone alarm line 4 is connected in series with the first zone leakage sensor normally open switch BJ1 and the first zone leakage relay KA1, and the first zone leakage indicator light HL1 is connected in parallel to the first zone leakage relay KA1.

[0012] The second zone alarm line 5 is connected in series with the normally open switch BJ2 of the second zone leakage sensor and the second zone leakage relay KA2, and the second zone leakage indicator light HL2 is connected in parallel to the second zone leakage relay KA2.

[0013] The third zone alarm line 6 is connected in series with the normally open switch BJ3 of the third zone leakage sensor and the third zone leakage relay KA3, and the third zone leakage indicator light HL3 is connected in parallel to the third zone leakage relay KA3.

[0014] On the common signal line 7, after the common signal relay KA4, normally open switches KA1-1, KA2-1, and KA3-1 of the leakage relays for the first, second, and third zones are connected in parallel. A buzzer line 8 is connected in parallel to the common signal relay KA4. A mute self-locking button SB and a buzzer HA are connected in series on the buzzer line 8. A maintenance relay KA5 is connected in parallel to the buzzer HA. A line is connected in parallel to the mute self-locking button SB. After the normally closed de-energized time-delay closing switch KA5-1 of the maintenance relay, normally open energized time-delay closing switches KA1-2, KA2-2, and KA3-2 of the leakage relays for the first, second, and third zones are connected in parallel.

Claims

1. A marine refrigerant leak alarm control circuit, comprising an AC220V power supply, characterized in that: The AC220V power supply live wire is connected in parallel to multiple groups of area alarm lines and common signal lines after passing through the first fuse, and then connected back to the AC220V power supply neutral line through the second fuse. The area alarm lines are connected in series with a normally open switch of an area leakage sensor and an area leakage relay. An area leakage indicator light is connected in parallel to the area leakage relay. The common signal line is connected in parallel to multiple lines after passing through the common signal relay. Multiple normally open switches of multiple area leakage relays for multiple groups of area alarm lines are set on each of the multiple lines. The common signal relay is connected to an external alarm or display device. A buzzer line is connected in parallel to the common signal relay. A silencer self-locking button and a buzzer are connected in series on the buzzer line.

2. The marine refrigerant leak alarm control circuit according to claim 1, characterized in that: The silencer self-locking button is connected in parallel with a first maintenance line, and the buzzer is connected in parallel with a second maintenance line. A maintenance relay is installed on the second maintenance line. The first maintenance line is split into multiple lines after passing through the normally closed de-energized delay closing switch of the maintenance relay. Each of the multiple lines is equipped with a normally open energized delay closing switch of a regional leakage relay for a regional alarm line.

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