Ventilation frequency conversion control system for air lubrication room

Abstract

The utility model relates to a ventilation frequency conversion control system of an air lubrication room, which comprises a fan frequency conversion control cabinet of the air lubrication compressor room, an air feeder frequency converter, an exhaust fan frequency converter, a pressure sensor and a temperature sensor, and the fan frequency conversion control cabinet of the air lubrication compressor room is respectively connected with the air feeder frequency converter and the exhaust fan frequency converter. The air feeder frequency converter is connected with the air feeder, and the exhaust fan frequency converter is connected with the exhaust fan; the fan frequency conversion control cabinet between the air lubrication compressors is further connected with a pressure sensor and a temperature sensor. According to the utility model, the power of the fan can be automatically adjusted under the condition that the compressor is used, and the ship energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of variable frequency fan control systems, in particular to a ventilation variable frequency control system for an air lubrication room. Background Art

[0002] In recent years, many shipowners have had more and more energy-saving design requirements for ships. This project is equipped with an air lubrication system. When the air lubrication system is in use, a large amount of air is required, and the air compressor also needs to dissipate heat. We need to design the ventilation air volume based on the maximum air usage and heat dissipation needs of the equipment. Therefore, the room ventilation air volume is very large and the fan power is relatively large.

[0003] The above-mentioned design of the prior art has the following defects:

[0004] The air lubrication system has different gears for the power of the air compressor according to different working conditions. Each gear has different requirements for the amount of air used, and the heat dissipation of the air compressor is also different. We design the ventilation volume based on the maximum requirements. When the air lubrication system is running at a low gear, the room ventilation still works at the maximum design air volume, which will waste more energy. Summary of the Invention

[0005] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide an air lubrication room ventilation frequency conversion control system for frequency conversion control of ventilation in air compressor rooms of air lubrication equipment on board ships.

[0006] The purpose of this utility model is achieved in this way:

[0007] An air lubrication room ventilation frequency conversion control system includes an air lubrication compressor room fan frequency conversion control cabinet, a blower frequency converter, an exhaust fan frequency converter, a pressure sensor, and a temperature sensor. The air lubrication compressor room fan frequency conversion control cabinet is connected to the blower frequency converter and the exhaust fan frequency converter, respectively. The blower frequency converter is connected to the blower, and the exhaust fan frequency converter is connected to the exhaust fan. The air lubrication compressor room fan frequency conversion control cabinet is also connected to the pressure sensor and the temperature sensor.

[0008] The blower inverter includes an outer shell, a mounting slot is provided on the upper front portion of the outer shell, and a control panel is arranged in the mounting slot; an extended relay output module and a bus module are provided in the outer shell, the extended relay output module is arranged below the mounting slot of the control panel, and the bus module is arranged below the extended relay output module; a plurality of relay output ports arranged vertically are provided on one side of the extended relay output module, an analog VO port and a digital input port are provided above the relay output port, and the analog VO port and the digital input port are arranged vertically on one side of the mounting slot of the control panel; an EIA485 interface is provided between the extended relay output module and the bus module; the structure of the exhaust fan inverter is the same as that of the blower inverter.

[0009] A ventilation frequency conversion control system for an air lubrication room, wherein the control panel is detachably mounted on an outer shell and can be used separately from the frequency converter.

[0010] A variable frequency control system for ventilation of an air lubrication room, wherein the control panel has a single-line digital display.

[0011] A variable frequency control system for ventilation in an air lubrication room, wherein the EIA485 interface has a built-in Modbus protocol.

[0012] A ventilation frequency conversion control system for an air lubrication room. When the motor cable is longer than the rated length, the blower frequency converter or the exhaust fan frequency converter is connected to an output reactor, so that the motor cable reaches 1.5 times the standard length.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] This utility model provides a variable frequency control system for ventilation in air-lubricated rooms. When the air lubrication gear is raised, the compressor intake volume increases. When the air volume used by the compressor in the room exceeds the air supply volume, the room pressure increases. The pressure sensor feeds back a signal to the control cabinet, which automatically adjusts the fan power to increase the air supply volume until the room pressure reaches the set value. Similarly, when the air lubrication gear is raised, the heat dissipation increases. If the temperature sensor detects that the temperature is higher than the set value, it feeds back a signal to the control diagram to adjust the fan air volume until the room temperature drops to the set value. This utility model automatically adjusts the fan power when the compressor operating conditions are met, reducing the ship's energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] Figure 2 This is a structural diagram of the frequency converter of the present utility model.

[0017] Figure 3It is a schematic diagram of the principle of the present utility model.

[0018] in:

[0019] Air-lubricated compressor room fan frequency conversion control cabinet 1, supply fan frequency converter 2, outer shell 2.1, control panel 2.2, expansion relay output module 2.3, bus module 2.4, relay output port 2.5, analog VO port 2.6, digital input port 2.7, EIA485 interface 2.8, supply fan 3, exhaust fan frequency converter 4, exhaust fan 5, pressure sensor 6, temperature sensor 7, output reactor 8. DETAILED DESCRIPTION

[0020] To better understand the technical solution of the present invention, the following detailed description is provided with reference to the relevant illustrations. It should be understood that the following specific embodiments are not intended to limit the specific implementation of the technical solution of the present invention; they are merely examples of possible implementations of the technical solution of the present invention. It should be noted that the description herein of the positional relationships of the various components, such as component A being located above component B, is based on the relative positions of the components in the illustrations and is not intended to limit the actual positional relationships of the components. Example 1

[0021] See also Figure 1-Figure 3 , Figure 1 A schematic diagram of the structure of the present invention is provided. As shown in the figure, the present invention relates to a variable-frequency ventilation control system for an air-lubricated compressor room. It includes a variable-frequency control cabinet 1 for the fan in the air-lubricated compressor room, a frequency converter for the blower 2, a frequency converter for the exhaust fan 4, a pressure sensor 6, and a temperature sensor 7. The variable-frequency control cabinet 1 for the fan in the air-lubricated compressor room is connected to the frequency converter for the blower 2 and the frequency converter for the exhaust fan 4, respectively. The frequency converter 2 for the blower is connected to the blower 3, and the frequency converter 4 for the exhaust fan 5 is connected to the frequency converter for the exhaust fan 5. The variable-frequency control cabinet 1 for the fan in the air-lubricated compressor room is also connected to the pressure sensor 6 and the temperature sensor 7.

[0022] The blower inverter 2 includes an outer shell 2.1, and a mounting slot is provided on the upper front portion of the outer shell 2.1. A control panel 2.2 is arranged in the mounting slot. The control panel 2.2 can be detachably mounted on the outer shell 2.1. The control panel 2.2 has a single-line digital display, which makes it easier to program the inverter and can be used separately from the inverter to control the inverter, modify parameter values or copy them to another inverter.

[0023] An expansion relay output module 2.3 and a bus module 2.4 are provided within the outer shell 2.1. The expansion relay output module 2.3 is disposed below the mounting slot of the control panel 2.2, and the bus module 2.4 is disposed below the expansion relay output module 2.3. Three relay output ports 2.5 are disposed one side of the expansion relay output module 2.3, arranged vertically. An analog VO port 2.6 and a digital input port 2.7 are disposed above the relay output ports 2.5. The analog VO port 2.6 and the digital input port 2.7 are disposed one side of the mounting slot of the control panel 2.2. An EIA485 interface 2.8 is provided between the expansion relay output module 2.3 and the bus module 2.4, and the EIA485 interface 2.8 has a built-in Modbus protocol.

[0024] The structure of the exhaust fan inverter 4 is the same as that of the supply fan inverter 2.

[0025] When the motor cable is longer than the rated length, the blower frequency converter 2 or the exhaust fan frequency converter 4 is connected to an output reactor 8 so that the motor cable reaches 1.5 times the standard length.

[0026] Working principle:

[0027] The utility model provides a variable frequency control system for ventilation in air-lubricated rooms, which automatically controls the power of the fan through sensors. The pressure sensor and temperature sensor are set according to the parameters of the air-lubricated system. When the air-lubricated gear is raised, the air intake of the compressor increases. When the air volume used by the compressor in the room is greater than the air volume supplied, the room pressure will increase. The pressure sensor will feed back a signal to the control cabinet, which will automatically adjust the fan power and increase the air volume supplied until the pressure in the room is consistent with the set value. Similarly, when the air-lubricated gear is raised, the heat dissipation increases. When the temperature sensor detects that the temperature is higher than the set value, it will feed back a signal to the control diagram to adjust the fan volume until the temperature in the room drops to the set value.

[0028] When the utility model is used, the frequency conversion control system for the fan in the air lubrication room can automatically adjust the power of the fan under the condition that the compressor is used, thereby reducing the energy consumption of the ship.

[0029] The above are only specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the scope of protection of the present invention.

Claims

1. A variable frequency control system for ventilation in an air lubrication room, characterized by: It comprises an air-lubricated compressor room fan frequency conversion control cabinet (1), a blower frequency converter (2), an exhaust fan frequency converter (4), a pressure sensor (6) and a temperature sensor (7). The air-lubricated compressor room fan frequency conversion control cabinet (1) is connected to the blower frequency converter (2) and the exhaust fan frequency converter (4), the blower frequency converter (2) is connected to the blower (3), and the exhaust fan frequency converter (4) is connected to the exhaust fan (5); the air-lubricated compressor room fan frequency conversion control cabinet (1) is also connected to the pressure sensor (6) and the temperature sensor (7). The blower frequency converter (2) comprises an outer shell (2.1), wherein a mounting slot is provided on the upper front portion of the outer shell (2.1), and a control panel (2.2) is provided in the mounting slot; an expansion relay output module (2.3) and a bus module (2.4) are provided in the outer shell (2.1), wherein the expansion relay output module (2.3) is provided below the mounting slot of the control panel (2.2), and the bus module (2.4) is provided below the expansion relay output module (2.3); One side is provided with a plurality of relay output ports (2.5) arranged vertically, an analog VO port (2.6) and a digital input port (2.7) are provided above the relay output port (2.5), and the analog VO port (2.6) and the digital input port (2.7) are arranged vertically on one side of the mounting slot of the control panel (2.2); an EIA485 interface (2.8) is provided between the extended relay output module (2.3) and the bus module (2.4); and the structure of the exhaust fan inverter (4) is the same as that of the blower inverter (2).

2. The air lubrication room ventilation frequency conversion control system according to claim 1, characterized in that: The control panel (2.2) is detachably mounted on the outer shell (2.1) and can be used separately from the frequency converter.

3. The air lubrication room ventilation frequency conversion control system according to claim 1, characterized in that: The control panel (2.2) has a single-line digital display.

4. The air lubrication room ventilation frequency conversion control system according to claim 1, characterized in that: The EIA485 interface (2.8) has built-in Modbus protocol.

5. The air lubrication room ventilation frequency conversion control system according to claim 1, characterized in that: When the motor cable is longer than the rated length, the blower frequency converter (2) or the exhaust fan frequency converter (4) is connected to an output reactor (8).

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