Automatic-regulating ventilation system and ventilation regulating method for polar ship machinery

Abstract

The invention provides an automatic regulating ventilation system and a ventilation condition method thereof for polar ship machinery. The automatic regulating ventilation system comprises an air inlet shutter, a blower, an exhaust shutter, an exhaust blower, a temperature sensor, a pressure sensor, a blower frequency converter, an exhaust blower frequency converter, a PLC and a power supply. Thetemperature sensor is used for detecting the average temperature in the machine and transmitting the temperature signal to the PLC. Two pressure sensors are used to detect the pressure difference inside and outside the machine and transmit the pressure difference signal to PLC. The blower frequency converter is used for regulating the rotational speed of the blower driving motor; The exhaust fan frequency converter is used for regulating the rotational speed of the exhaust fan driving motor; PLC is used to control the frequency converter of the blower and the frequency converter of the exhaustblower. The power supply is used to power the entire auto-regulating ventilation system. The invention has the advantages of simple structure and convenient use. The PLC automatically adjusts the rotational speed of the fan through continuous circulation collection and control so as to control the temperature at the machine place at the set target value.

Description

technical field [0001] The invention relates to a ventilation system for ships, in particular to an automatic adjustment ventilation system and a ventilation adjustment method for machinery spaces of polar ships. Background technique [0002] The main function of the ventilation system of the ship's machinery space is to provide the necessary combustion air for the combustion equipment, take away the heat dissipation of the equipment and create suitable environmental conditions for the staff in the machinery space. There are certain differences between polar ships and ships operating in conventional unrestricted navigation areas. The ambient temperature and the temperature of the machinery space vary greatly in different seasons, especially in low temperature environments. If the ventilation system of the machinery space still uses the usual design Without any improvement measures, it will bring a series of problems and risks in use. [0003] The technical scheme of prior a...

AI Technical Summary

Problems solved by technology

[0006] 1. For ships with only one blower fan in the machinery space, the air supply volume cannot be adjusted by adjusting the number of blowers

[0007] 2. The air volume of the fans in the machinery space is generally relatively large. Only relying on the practice of turning on some fans will still cause a large amount of outdoor cold air to be sent into the machinery space, resulting in a sharp drop in the temperature of the machinery space

[0008] 2. When a large amount of cold air passes through the fan inlet louvers, it may cause the louvers to freeze to varying degrees, and the effective flow area of ​​the air inlet louvers will continue to shrink. It is necessary to set deicing or anti-icing measures for the louvers

[0009] 4. Under different external ambient temperature conditions, the air volume required by each air outlet is actually different, and it is difficult to adjust and achieve the required air volume through the air outlet

[0010] 5. When the temperature in the machinery space continues to decrease and approaches the lower limit of the temperature in the cabin, it may be necessary to temporarily close the blower and all air outlets. When the temperature gradually rises back to the upper limit, the blower and air outlets need to be turned on again

[0014] 1. For ships with only one blower fan in the machinery space, the air supply volume cannot be adjusted by adjusting the number of blowers

[0015] 2. The air volume of the fans in the machinery space is generally relatively large. Only relying on the practice of turning on some fans will still cause a large amount of outdoor cold air to be sent into the machinery space, resulting in a sharp drop in the temperature of the machinery space

[0016] 3. When a large amount of cold air passes through the fan inlet louvers, it may cause the louvers to freeze to varying degrees, and the effective flow area of ​​the air inlet louvers will continue to shrink. It is necessary to set deicing or anti-icing measures for the louvers

[0017] 4. Under different external ambient temperature conditions, the air volume required by each air outlet is actually different, and it is difficult to adjust and achieve the required air volume through the air outlet

[0018] 5. When the temperature in the machinery space continues to decrease and approaches the lower limit of the cabin temperature, it may be necessary to turn off the blower and all air outlets for a short time, and turn it on again when the temperature gradually increases and approaches the upper limit.

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