System for realizing automatic start and stop of air conditioner in frequency conversion chamber of ship

Abstract

The utility model relates to the field of ship automation control, in particular to a system for achieving automatic starting and stopping of an air conditioner of a ship frequency conversion chamber. Comprising a manual start-stop loop and an automatic start-stop loop. The remote switch-on relays K3 and K7 and the remote switch-off relays K4 and K8 are connected in an integrated control cabinet of the anchor gear through connecting wires and are used for enabling the positioning anchor gear and an air conditioner in a frequency conversion chamber to work synchronously on remote switch-on and switch-off. And meanwhile, an automatic and manual change-over switch and a remote control indicator lamp are additionally arranged in the air conditioner control box. It is guaranteed that the air conditioner device can be started in a remote control mode and can be started beside the machine during maintenance. After the anchor gear is remotely switched on, the air conditioner in the frequency conversion chamber is restarted at an interval of 20 seconds, so that the impact on the power grid caused by the simultaneous starting of the anchor gear frequency converter and the air conditioner device is prevented. According to the utility model, the failure rate of the windlass frequency converter is greatly reduced, the working efficiency of the air conditioning device is improved, the safety performance is more stable, the principle is simple, and the function is more scientific and reasonable.

Description

Technical Field

[0001] The utility model relates to the field of ship automation control, in particular to a system for realizing automatic start and stop of an air conditioner in a ship frequency conversion room. Background Art

[0002] The crane 29 ship is a non-self-propelled, full-rotation, variable-luffing floating crane built by a Shanghai shipyard in 2010. The ship is equipped with 8 anchors, and the anchor winches are driven by inverters. The maximum heat generation of the anchor winch inverter room is about 70KW. The inverter room is equipped with a CJKR-70 marine assembled air conditioning unit produced by a Jiangsu company.

[0003] Since the crane 29 ship was put into offshore wind power construction after the factory transformation, the construction task is heavy and it needs to move berths many times a day, so the ship's positioning anchor machine works frequently. The air conditioner in the anchor machine inverter room is manually started and stopped. Before and after the bridge starts the anchor machine, it is necessary to notify the cabin personnel to start and stop the air conditioning device. During use, there are situations where the air conditioner is not turned on and off in time, causing the air conditioner to run for a long time after the inverter stops running, the air conditioning device does not start after the inverter starts, and the inverter room temperature is too high to burn the anchor machine inverter mainboard and fan drive board and module components. In order to reduce the failure rate of inverter equipment, reduce maintenance costs, and improve the working efficiency of air conditioning devices, the research and development of the automatic start and stop system of the inverter room air conditioning device has become a problem to be solved. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a system for realizing automatic start and stop of the air conditioner in the frequency conversion room of a ship, so that two devices with different functions and effects can work synchronously or independently.

[0005] The technical solution adopted by the utility model to achieve the above-mentioned purpose is: a system for realizing automatic start and stop of the air conditioner in the frequency conversion room of a ship, characterized in that: the system includes a manual start and stop circuit and an automatic start and stop circuit;

[0006] The manual start-stop circuit comprises:

[0007] A circuit formed by connecting the second transfer switch, the resistor, and the auxiliary contacts of the compressor contactor in series in sequence;

[0008] A circuit formed by connecting the fan contactor, thermal relay 3, thermal relay 2, compressor high-pressure controller, compressor over-temperature protector, intermediate relay, and manual start button in series in sequence;

[0009] The manual stop button is connected in series with the fan contactor coil circuit;

[0010] The above three series circuits are connected in parallel;

[0011] Press the manual start button, the fan contactor coil is energized and interlocked, the intermediate relay coil is energized and interlocked, the compressor starts, and the fan starts. Press the manual stop button, the fan contactor coil loses power, the fan contactor contacts are disconnected, and the compressor and fan stop.

[0012] The automatic start-stop circuit comprises:

[0013] A circuit formed by connecting the second transfer switch, the resistor, and the auxiliary contacts of the compressor contactor in series in sequence;

[0014] A circuit formed by connecting the conversion switch 1, the closing relay 1, the closing relay 2, the fan contactor, and the air conditioner start delay time relay in series in sequence; the closing relay 1 and the closing relay 2 are connected in parallel and then connected in series in the circuit;

[0015] A circuit is formed by connecting the air conditioner start delay time relay contact, the manual stop button, the power-off relay 1, the power-off relay 2, the thermal relay 1, and the fan contactor in series in sequence; the power-off relay 1 and the power-off relay 2 are connected in parallel and then in series in the circuit; the manual stop button is normally closed;

[0016] A circuit formed by connecting the air conditioner start delay time relay contact, thermal relay 3, thermal relay 2, compressor over-temperature protector, and intermediate relay in series in sequence;

[0017] The above four series circuits are connected in parallel.

[0018] Closing relay 1 and closing relay 2 are closed, and the air conditioner start delay time relay coil is energized for 20 seconds, and its contacts are closed, and the fan compressor starts. Power-off relay 1 and power-off relay 2 are opened, the fan contactor coil is de-energized, and the fan compressor stops.

[0019] The system includes the following indicators:

[0020] The white power indicator light is connected in parallel with the transformer, and the air conditioner in the inverter room is powered on;

[0021] The green compressor crankcase heating indicator light is connected in parallel with the resistor and in series with the auxiliary contact of the compressor contactor, indicating that the compressor oil is being heated in preparation for compression start;

[0022] The green operation indicator light, connected in series with the thermal relay, indicates that the fan is operating normally;

[0023] The red compressor high-pressure indicator light is connected in series with the compressor high-pressure controller, thermal relay three, and thermal relay two. When it lights up, it indicates the compressor over-temperature alarm;

[0024] The red compressor overload indicator light is connected in series with thermal relay 3 and thermal relay 2. When it lights up, it means the compressor is overloaded;

[0025] The green water pressure normal indicator light, connected in series with the water pressure controller, indicates that the water pressure is normal;

[0026] The green remote control indicator light is connected in series with the switch when it is turned to the "remote control automatic" position, indicating that it is currently in the automatic start and stop state.

[0027] The utility model adds a 4×1.5mm² wire between the anchor winch integrated control cabinet and the air conditioning device control box, and connects to the remote closing relays K3 and K7 and the remote opening relays K4 and K8 in the anchor winch integrated control cabinet, so as to synchronize the work of the anchor winch and the inverter room air conditioner in remote closing and opening. At the same time, an automatic and manual conversion switch and a remote control indicator light are added to the air conditioning control box. It is ensured that the air conditioning device can be started remotely or started next to the machine during maintenance. A time relay is added. When the anchor winch is remotely closed, the inverter room air conditioner is started again after an interval of 20 seconds, so as to prevent the anchor winch inverter and the air conditioning device from starting at the same time and causing too much impact on the power grid.

[0028] The utility model greatly reduces the failure rate of the anchor windlass inverter and improves the working efficiency of the air conditioning device by optimizing and reconstructing the electrical interlocking of two different devices. The interlocked anchor windlass and air conditioning device have more stable safety performance, simple principle, more scientific and reasonable functions, and improve the phenomenon of frequent lifting and positioning anchor work and insufficient cooling capacity of the inverter. The independent machine-side start and machine-side stop functions of the air conditioning device are retained. The air conditioning device is prevented from automatically starting when the air conditioning device is maintained, inspected or repaired. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a simplified structural diagram of the control system of the utility model;

[0030] Figure 2 This is the control circuit diagram of the utility model;

[0031] In the figure: FU1: fuse one; FU2: fuse two; TC1: control transformer; HL1: power indicator light; SA1: conversion switch one; SA2: conversion switch two; RF: resistor; HL2: compressor crankcase heating indicator light; 2KM1: compressor contactor auxiliary contact; K3: closing relay one; K7: closing relay two; 1KM: fan contactor; 7KT: air conditioner start delay time relay; HL10: remote control indicator light; SB1: manual start button; SB2: manual stop button; K4: power-off relay one; K8: power-off relay two; FR1: thermal relay one; 2FR2: thermal relay two; 2FR1: thermal relay three; 1KM: fan operation contactor; HL3: operation indicator light; HP: compressor high-pressure controller; OP: compressor oil pressure difference controller; STW: compressor over-temperature protector; KA1: intermediate relay; WP: water pressure controller; HL4: compressor high-pressure indicator light; HL5: compressor overload indicator light; HL6: normal water pressure indicator light. DETAILED DESCRIPTION Example 1

[0032] A system for realizing automatic start and stop of a ship inverter room air conditioner, the system comprising a manual start and stop circuit and an automatic start and stop circuit;

[0033] The manual start-stop circuit comprises:

[0034] A circuit formed by connecting the second switch SA2, the resistor RF, and the auxiliary contact 2KM1 of the compressor contactor in series in sequence;

[0035] A circuit formed by the fan contactor 1KM, thermal relay 3 2FR1, thermal relay 2 2FR2, compressor high-pressure controller HP, compressor over-temperature protector STW, intermediate relay KA1, and manual start button SB1 connected in series in sequence;

[0036] The manual stop button SB2 is connected in series with the 1KM coil of the fan contactor;

[0037] The above three series circuits are connected in parallel;

[0038] Press the manual start button SB1, the fan contactor 1KM coil is energized and interlocked, the intermediate relay KA1 coil is energized and interlocked, the compressor starts, and the fan starts. Press the manual stop button SB2, the fan contactor 1KM coil loses power, the fan contactor 1KM contacts are disconnected, and the compressor and fan stop.

[0039] The automatic start-stop circuit comprises:

[0040] A circuit formed by connecting the second switch SA2, the resistor RF, and the auxiliary contact 2KM1 of the compressor contactor in series in sequence;

[0041] A circuit formed by connecting the switching switch SA1, the closing relay K3, the closing relay K7, the fan contactor 1KM, and the air conditioner start delay time relay 7KT in series in sequence; the closing relay K3 and the closing relay K7 are connected in parallel and then connected in series in the circuit;

[0042] The air conditioner start delay time relay 7KT contact, the manual stop button SB2, the power-off relay 1 K4, the power-off relay 2 K8, the thermal relay FR1, and the fan contactor 1KM are connected in series in sequence to form a circuit; the power-off relay 1 K4 and the power-off relay 2 K8 are connected in parallel and then connected in series in the circuit; the manual stop button SB2 is normally closed;

[0043] A circuit formed by connecting the air conditioner start delay time relay 7KT contact, thermal relay 3 2FR1, thermal relay 2 2FR2, compressor over-temperature protector STW, and intermediate relay KA1 in series in sequence;

[0044] The above four series circuits are connected in parallel.

[0045] The closing relay 1 K3 and the closing relay 2 K7 are closed, and the air conditioner start delay time relay 7KT coil is energized for 20 seconds and its contacts are closed, and the fan compressor starts. The power-off relay 1 K4 and the power-off relay 2 K8 are opened, the fan contactor 1KM coil is de-energized, and the fan compressor stops.

[0046] The system includes the following indicators:

[0047] The white power indicator HL1 is connected in parallel with the transformer, and the air conditioner in the inverter room is powered on;

[0048] The green compressor crankcase heating indicator HL2 is connected in parallel with the resistor RF and in series with the compressor contactor auxiliary contact 2KM1, indicating that the compressor oil is being heated in preparation for compression start;

[0049] The green operation indicator HL3 is connected in series with the thermal relay FR1, indicating that the fan is operating normally;

[0050] The red compressor high-pressure indicator HL4 is connected in series with the compressor high-pressure controller HP, thermal relay three 2FR1, and thermal relay two 2FR2. When it lights up, it indicates the compressor over-temperature alarm;

[0051] The red compressor overload indicator HL5 is connected in series with thermal relay 3 2FR1 and thermal relay 2 2FR2. When it lights up, it means the compressor is overloaded;

[0052] The green water pressure normal indicator light HL6, connected in series with the water pressure controller WP, indicates that the water pressure is normal;

[0053] The green remote control indicator light HL10 is connected in series with the conversion switch SA1 turned to the "remote control automatic" position, indicating that it is currently in the automatic start and stop state. Example 2

[0054] The working principle of the utility model is as follows:

[0055] 1. Manual start and stop at the machine:

[0056] (1) SA2 turns to the "M" position, SA2 (2-1R) is closed, 2KM1 (1F-4) is normally closed, SA2, RF, and 2KM1 are connected in series, and resistor RF (1R-1F) is turned on to heat the compressor oil in preparation for compression start. After the compressor starts, 2KM1 (1F-4) disconnects the oil heating circuit.

[0057] (2) Turn SA1 to the "M" position, disconnect the 7KT time relay circuit, and perform manual start at the machine side.

[0058] (3) Press the fan start button SB1 (2-11) to close, the fan contactor 1KM is powered and self-locked, and the fan runs. The control circuit is as follows: SB1 (2-11) is closed → fan stop button SB2 (11-6) is normally closed → SA1 is manually turned on (6-9) → SA2 is manually turned on (9-7') → fan overload protection contact FR1 (7'-8) is closed → fan contactor 1KM (8-4) its normally open contact 1KM (2-11) is closed and self-locked, keeping 1KM powered and the fan running normally.

[0059] SB1 (22-4) is also closed at the same time, the intermediate relay KA1 (22-4) contacts are closed and self-locked, KA1 is energized to prepare for the subsequent compressor start-up, and its control circuit is: compressor overload protection 2FR1 (11-14) and 2FR2 (14-15) are connected in series → high-voltage switch HP (15-17) is connected in series → compressor oil pressure switch OP (17-18) → compressor over-temperature protection switch STW (18-21) → intermediate relay coil KA1 (21-22) → KA1 auxiliary contact KA1 (22-4) is self-locked and closed, the intermediate relay KA1 remains energized, closing the compressor start-up circuit to prepare for the compressor start-up, manually stop the fan by pressing the SB2 (11-6) button, the fan stops, and after the fan stops, the compressor also stops working.

[0060] 2. Remote control automatic start and stop:

[0061] (1) SA1 and SA2 are turned to the "remote control automatic" position, the anchor winch is powered on, and the anchor winch console is "controlled closed". After the anchor winch inverter is successfully closed, the anchor winch integrated control cabinet K3 and K7 relays are energized and attracted. The K4 and K8 relays are de-energized and released, and the time relay 7KT is attracted. The control circuit is as follows: SA1 (2-2') is closed in automatic state → the start signal K3 (2'-3) and K7 (2'-3) from the anchor winch integrated control cabinet are closed in parallel → the fan contactor contact KM (3-4) is connected in series → the time relay 7KT is energized and attracted, and after a delay of 20 seconds, 7KT (2-11) is closed → 1KM (2-11) is self-locked → the fan stop button SB2 (11-6) is normally closed → SA1 (6-6') is closed (automatic) → SA2 (6'-7) is closed (automatic) → the fan overload protection contact FR1 (7'-8) → the fan contactor 1KM (8-4) is energized and attracted → the fan starts running, and after 1KM (2-11) is self-locked, it prepares for KA1 to be attracted.

[0062] (2) After the button SB1 is pressed, the intermediate relay KA1 is energized by the self-locking contact KA1 (22-4). Its control circuit is as follows: the compressor overload protection contacts 2FR1 (11-14) and 2FR2 (14-15) are connected in series and closed → connected in series with the high-voltage switch HP (15-17) → the oil pressure holding switch OP (17-18) → connected in series with the compressor over-temperature protection STW (18-21) → the intermediate relay KA coil → KA1 (self-locking point) (22-4): KA1 is energized and its contacts are closed, connecting the compressor start circuit.

[0063] (3) After the fan is started, the contact of time relay 1KM (3-4) is cut off; when the compressor is running, the contact of compressor contactor 2KM1 cuts off the lubricating oil heating port.

[0064] (4) When the engine is stopped by remote control, the "Control Off" button is pressed on the anchor winch control panel at the navigation station, and the anchor winch frequency conversion stops running. At this time, the K3 and K7 relays in the anchor winch integrated control cabinet are de-energized, and their contacts K3 (2'-3) and K7 (2'-3) are disconnected. The K4 and K8 circuit breakers are energized, and their normally closed points K4 (7-7') and K8 (7-7') disconnect the fan contactor 1KM circuit, preparing for the next start.

Claims

1. A system for realizing automatic start and stop of air conditioner in frequency conversion room of ship, characterized in that: The system includes a manual start-stop circuit and an automatic start-stop circuit; The manual start-stop circuit comprises: A circuit formed by connecting the transfer switch 2 (SA2), the resistor (RF), and the auxiliary contact of the compressor contactor (2KM1) in series; A circuit formed by connecting the fan contactor (1KM), thermal relay three (2FR1), thermal relay two (2FR2), compressor high pressure controller (HP), compressor over-temperature protector (STW), intermediate relay (KA1), and manual start button (SB1) in series; The manual stop button (SB2) and the fan contactor (1KM) coil are connected in series; The above three series circuits are connected in parallel; The automatic start-stop circuit comprises: A circuit formed by connecting the transfer switch 2 (SA2), the resistor (RF), and the auxiliary contact of the compressor contactor (2KM1) in series; A circuit is formed by connecting a transfer switch 1 (SA1), a closing relay 1 (K3), a closing relay 2 (K7), a fan contactor (1KM), and an air conditioner start delay time relay (7KT) in series in sequence; the closing relay 1 (K3) and the closing relay 2 (K7) are connected in parallel and then connected in series in the circuit; A circuit is formed by connecting the contact of the air conditioner start delay time relay (7KT), the manual stop button (SB2), the power-off relay 1 (K4), the power-off relay 2 (K8), the thermal relay 1 (FR1), and the fan contactor (1KM) in series in sequence; the power-off relay 1 (K4) and the power-off relay 2 (K8) are connected in parallel and then in series in the circuit; the manual stop button (SB2) is normally closed; A circuit formed by connecting the air conditioner start delay time relay (7KT) contacts, thermal relay three (2FR1), thermal relay two (2FR2), compressor over-temperature protector (STW), and intermediate relay (KA1) in series in sequence; The above four series circuits are connected in parallel.

2. A system for realizing automatic start and stop of air conditioner in a ship inverter room according to claim 1, characterized in that: The system includes the following indicators: The white power indicator light (HL1) is connected in parallel with the transformer, and the inverter room air conditioner is powered on; The green compressor crankcase heating indicator light (HL2) is connected in parallel with the resistor (RF) and in series with the compressor contactor auxiliary contact (2KM1), indicating that the compressor oil is being heated in preparation for compression start; The green operating indicator light (HL3), connected in series with thermal relay 1 (FR1), indicates that the fan is operating normally; The red compressor high-pressure indicator light (HL4) is connected in series with the compressor high-pressure controller (HP), thermal relay three (2FR1), and thermal relay two (2FR2). When it lights up, it indicates the compressor over-temperature alarm; The red compressor overload indicator light (HL5) is connected in series with thermal relay 3 (2FR1) and thermal relay 2 (2FR2). When it lights up, it means the compressor is overloaded. The green normal water pressure indicator (HL6), connected in series with the water pressure controller (WP), indicates that the water pressure is normal; The green remote control indicator light (HL10) is connected in series with the conversion switch 1 (SA1) turned to the "remote control automatic" position, indicating that the current state is automatic start and stop.

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