CN113619765A - Ventilation system at ship machinery place - Google Patents
Ventilation system at ship machinery place Download PDFInfo
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- CN113619765A CN113619765A CN202110822646.8A CN202110822646A CN113619765A CN 113619765 A CN113619765 A CN 113619765A CN 202110822646 A CN202110822646 A CN 202110822646A CN 113619765 A CN113619765 A CN 113619765A
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- 238000009423 ventilation Methods 0.000 title claims abstract description 50
- 238000007664 blowing Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000004069 differentiation Effects 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005399 mechanical ventilation Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/02—Ventilation; Air-conditioning
- B63J2/06—Ventilation; Air-conditioning of engine rooms
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Control Of Multiple Motors (AREA)
Abstract
The invention discloses a ventilation system at a ship machinery place, which comprises an air supply unit communicated with an air inlet, an exhaust unit communicated with an air outlet, a first frequency converter, a second frequency converter and a sensor, wherein the first frequency converter and the second frequency converter are electrically connected with the sensor, a PID (proportion integration differentiation) module of the first frequency converter processes signals of the sensor and outputs the signals to the air supply unit, and a PID module of the second frequency converter processes signals of the sensor and outputs the signals to the exhaust unit. This ventilation system of marine machinery department utilizes the inside PID module of converter, carries out simple processing to the signal of sensor, then exports to air supply unit or exhaust unit to realize simply controlling the function of exhaust unit and air supply unit, need not additionally to set up the controller, simple structure, cost are lower. Meanwhile, the air supply unit and the exhaust unit are respectively controlled by arranging different frequency converters so as to achieve a better adjusting effect.
Description
Technical Field
The invention relates to a ventilation system at a ship machinery place.
Background
Aiming at the ventilation requirements of ship machinery, the cabin ventilation systems in the fields of civil commercial ships, maritime workers and passenger ships generally adopt a mechanical ventilation mode of a single-speed fan, the fan always operates under the maximum working condition, and the energy efficiency performance is poor. On some important projects, a frequency converter one-to-one driving fan ventilation mode is often directly adopted, advanced programmable controller application is combined to control the rotating speed of a fan, the air quantity in a service place is dynamically adjusted, but the overall system performance and logic of the fan are far beyond the actual requirements, the structure is complex, and the construction cost and the maintenance difficulty are correspondingly and rapidly increased.
Disclosure of Invention
The invention aims to overcome the defects that a control system in the prior art is far beyond the actual requirement and wastes resources, and provides a ventilation system for a ship machinery place.
The invention solves the technical problems through the following technical scheme:
the utility model provides a ventilation system at ship machinery place, ventilation system is including the air supply unit that communicates in the air intake and the exhaust fan group that communicates in the air outlet, ventilation system still includes first converter, second converter and sensor, first converter and second converter with the sensor electricity is connected, the PID module of first converter will export after the signal processing of sensor extremely air supply unit, the PID module of second converter will export after the signal processing of sensor extremely exhaust fan group.
In this scheme, adopt above-mentioned structural style, utilize the inside PID module of converter, simply handle the signal of sensor, then export to air supply unit or exhaust unit to realize simply controlling the function of exhaust unit and air supply unit, need not additionally to set up the controller, simple structure, cost are lower. Meanwhile, the air supply unit and the exhaust unit are respectively controlled by arranging different frequency converters so as to achieve a better adjusting effect.
Preferably, the sensors include a pressure sensor and a temperature sensor, the pressure sensor is disposed at the blower unit and electrically connected to the first frequency converter, the pressure sensor outputs an acquired signal to the first frequency converter, the temperature sensor is disposed at the exhaust unit and electrically connected to the second frequency converter, and the temperature sensor outputs an acquired signal to the second frequency converter.
In this scheme, adopt above-mentioned structural style, utilize the size of pressure sign intake on the one hand, transmit the pressure numerical value to first converter, air supply unit is adjusted based on the size of intake again to first converter, and on the other hand utilizes the good and bad of temperature sign effect of airing exhaust, transmits the temperature numerical value to the second converter, and exhaust fan group is adjusted based on the good and bad of effect of airing exhaust again to the second converter, forms the control respectively of air supply unit and exhaust fan group.
Preferably, the air supply unit comprises a plurality of air supply motors, the exhaust unit comprises a plurality of exhaust motors, and the air supply motors and the exhaust motors are alternately arranged at intervals.
In this scheme, adopt above-mentioned structural style, make near high-pressure region near the blower unit and near the low pressure region alternate interval arrangement of exhaust unit, be favorable to the effective flow of air, reinforcing ventilation effect.
Preferably, the arrangement of the air supply unit and the air exhaust unit is symmetrical about the center of the machinery space.
In this scheme, adopt above-mentioned structural style, make machinery department inside distribute air supply unit and exhaust fan group uniformly, make the ventilation effect more even.
Preferably, the maximum power of the first frequency converter is not less than 120% of the sum of the maximum powers of all the air supply motors of the air supply unit, and the maximum power of the second frequency converter is not less than 120% of the sum of the maximum powers of all the air exhaust motors of the air exhaust unit.
In this scheme, adopt above-mentioned structural style, make the converter have certain bearing capacity to the ultimate load of air supply unit or exhaust unit, guarantee the work safety of circuit.
Preferably, the motor circuits of the air supply unit and the exhaust unit are both provided with thermal relays.
In this scheme, adopt above-mentioned structural style, when the circuit transships, thermal relay can initiatively break off, reaches the effect of the motor circuit of protection air supply unit and exhaust unit.
Preferably, the operation value of the thermal relay is set to be 1.05 times of the rated current of the blower unit or the exhaust unit.
In this scheme, adopt above-mentioned structural style, when guaranteeing that thermal relay normal operating can the protection circuit, improve thermal relay's load capacity.
Preferably, the incoming line switches of the first frequency converter and the second frequency converter are air switches.
In this scheme, adopt above-mentioned structural style, when work load is too big, the inlet wire of converter circuit is cut off voluntarily, plays the effect of insurance.
Preferably, the exhaust fan set and the blower fan set are provided with a bypass circuit which does not pass through the frequency converter, when the air switch trips, the bypass circuit is automatically switched on, and the blower fan set and the exhaust fan set are directly connected with a power supply.
In this scheme, adopt above-mentioned structural style, when meetting emergency converter stop work, directly link to each other air supply unit and exhaust unit with the power to preset power and ventilate temporarily, do not influence the holistic ventilation effect of boats and ships machinery department ventilation system.
Preferably, the air supply unit is composed of a plurality of air supply motors with the same model and power, and the exhaust unit is composed of a plurality of exhaust motors with the same model and power.
In this scheme, adopt above-mentioned structural style, make the converter when adjusting, the control effect to a plurality of air supply motors and air exhaust motor is the same, and the regulation of the inside whole ventilation effect of boats and ships machinery department of being convenient for alleviates noise and vibrations simultaneously.
The positive progress effects of the invention are as follows: this ventilation system of marine machinery department utilizes the inside PID module of converter, carries out simple processing to the signal of sensor, then exports to air supply unit or exhaust unit to realize simply controlling the function of exhaust unit and air supply unit, need not additionally to set up the controller, simple structure, cost are lower. Meanwhile, the air supply unit and the exhaust unit are respectively controlled by arranging different frequency converters so as to achieve a better adjusting effect.
Drawings
Fig. 1 is a schematic view showing an overall structure of a ventilation system at a ship machinery site according to a preferred embodiment of the present invention.
Fig. 2 is a schematic diagram of the distribution of air supply/exhaust motors of the ventilation system at the ship machinery space according to the preferred embodiment of the present invention.
Fig. 3 is a schematic diagram showing a connection of a part of a circuit of a frequency converter and an air supply/exhaust motor of a ventilation system at a ship machinery place according to a preferred embodiment of the present invention.
Description of reference numerals:
first frequency converter 11
Pressure sensor 31
Temperature sensor 32
Air switch 4
Thermal relay 5
Bypass circuit switch 6
Air inlet 71
Air brake 8
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
As shown in fig. 1, the present embodiment provides a ventilation system at a ship machinery place, where the ventilation system includes a blower unit communicated with an air inlet 71 and an exhaust blower unit communicated with an air outlet 72, and further includes a first frequency converter 11, a second frequency converter 12, a pressure sensor 31, and a temperature sensor 32. The pressure sensor 31 is arranged at the air blower unit, is electrically connected with the first frequency converter 11 and outputs a signal to the first frequency converter 11, and the PID module of the first frequency converter 11 processes the signal of the pressure sensor 31 and outputs the processed signal to the air blower unit; the temperature sensor 32 is disposed at the exhaust fan set, electrically connected to the second frequency converter 12, and outputs a signal to the second frequency converter 12, and the PID module of the second frequency converter 12 processes the signal of the temperature sensor 32 and outputs the processed signal to the exhaust fan set. Air brakes 8 for controlling the opening and closing of the air duct are arranged between the air inlet 71 and the air supply unit and between the air outlet 72 and the exhaust unit.
The internal equipment of the marine machinery space 100 needs ventilation in order to maintain temperature balance during operation. The fresh air with a low temperature is sent from the air inlet 71 to the marine machinery 100 by the air supply motor 21, so that the temperature inside the marine machinery 100 is reduced, and after sufficient heat exchange, the fresh air is discharged from the air discharge motor 22 through the air outlet 72. When the working state of the internal equipment of the marine machinery location 100 changes or the external environment changes, such as illumination changes, air temperature changes, and the like, the temperature balance of the ventilation system is broken, the internal temperature of the machinery location is increased, and at this time, a regulating device must be introduced to enable the ventilation system to have a regulating function.
Specifically, a pressure sensor 31 and a temperature sensor 32 are added to the ventilation system for feeding back the pressure and the temperature, respectively. Firstly, the pressure is used for representing the size of the air inlet volume, the pressure value is transmitted to the first frequency converter 11, and the first frequency converter 11 adjusts the power of the air supply unit based on the size of the air inlet volume. And when the pressure intensity is smaller than the preset value, increasing the power of the air blower set. It should be noted that, when the intake air amount is not changed, if the internal temperature at the machinery space gradually increases, the spontaneous air convection becomes stronger, and the data acquired by the pressure sensor 31 also becomes larger. Secondly, the temperature is used for representing the quality of the air exhaust effect, the temperature value is transmitted to the second frequency converter 12, and the second frequency converter 12 adjusts the power of the exhaust fan set based on the quality of the air exhaust effect. When the air intake and the air exhaust are not changed, but the working state of the equipment inside the machinery space is changed, which causes the internal temperature of the machinery space to rise, the data obtained by the temperature sensor 32 located at the air outlet 72 will become larger. When the temperature is greater than or equal to the preset value, the second frequency converter 12 controls the exhaust fan set to work at the maximum rotating speed.
The two control logics are combined to form a regulating system capable of respectively controlling the air supply unit and the exhaust unit, so that the whole ventilating system at the ship machinery has the self-adaptive regulating capacity.
As shown in fig. 2, the blower unit includes a plurality of blower motors 21, the exhaust unit includes a plurality of exhaust motors 22, the blower motors 21 and the exhaust motors 22 are alternately arranged at intervals, and the arrangement of the blower unit and the exhaust unit is symmetrical with respect to the center of the machinery space.
Specifically, according to the common physical knowledge, the air supply unit supplies fresh air to the machinery space, so the air pressure at the machinery space is high, and the exhaust unit exhausts the air inside the machinery space, so the air pressure at the machinery space is low. In the present embodiment, the air blowing motor 21 and the air discharging motor 22 are alternately disposed, that is, the high air pressure and the low air pressure are alternately disposed. Air naturally flows from a high-air-pressure position to a low-air-pressure position, and when a plurality of areas with staggered high air pressure and low air pressure are generated inside the mechanical place, the air exchange inside the mechanical place can be promoted, and the ventilation efficiency and the heat exchange efficiency are improved. On the basis, the plurality of air feeding/exhausting motors which are symmetrically arranged can generate vortex flow at a special position on the basis of the effect, so that the ventilation efficiency and the heat exchange efficiency are further improved.
As shown in fig. 1 to 3, in the present embodiment, the maximum power of the first frequency converter 11 is not less than 120% of the sum of the maximum powers of all the air supply motors 21, and the maximum power of the second frequency converter 12 is not less than 120% of the sum of the maximum powers of all the air exhaust motors 22.
Specifically, in this embodiment, setting the maximum power of the inverter to 120% of the sum of the maximum powers of the air supply/exhaust motors driven by the inverter is a measure for protecting the circuit. If the percentage is set to 100%, the inverter may be in a high-load or full-load operating state for a long time, and the service life of the inverter may be drastically shortened. In order to reduce the failure rate and indirectly improve the working efficiency of the ventilation system, 20% of the sum of the maximum powers of the air supply/exhaust motors driven by the frequency converter is set as the safe power.
As shown in fig. 3, in the present embodiment, the thermal relay 5 is provided in the electric circuit of each of the blower unit and the exhaust unit, and the operation value of the thermal relay 5 is set to be 1.05 times the rated current of the blower unit or the exhaust unit. When the motor and the relay are in high-load operation for a long time, the current in the circuit is easy to be overlarge, and if the motor and the relay continuously operate for a long time, high temperature is easy to generate accidents for damaging components, and a fire disaster can be caused seriously. Considering the safety of a ventilation system at a ship machinery place, the thermal relay 5 is additionally arranged in a circuit, when the current is more than or equal to 1.05 times of the rated current of the air supply unit or the exhaust unit, the thermal relay is automatically disconnected, and accidents are avoided at the first time.
When the above condition happens, the alarm device can be triggered to inform the staff of overhauling, so that the components can be replaced in time, and the ventilation system can be integrally recovered to work normally. It will be appreciated by those skilled in the art that the alarm device may be a separate device from the ventilation system or may be an additional module in the ventilation system, provided that it is of some construction to achieve the above-described functions.
As shown in fig. 3, the inlet switches of the first frequency converter 11 and the second frequency converter 12 are air switches 4, and the exhaust unit and the blower unit further have bypass circuits that do not pass through the frequency converters. When the air switch 4 trips, the bypass circuit switch 6 is automatically switched on, and the air supply unit and the exhaust unit are directly connected with a power supply.
Specifically, when the air switch 4 is tripped, the bypass circuit switch 6 is instantly turned on by circuit control, and the air supply unit and the air exhaust unit are directly connected with the power supply through the bypass circuit without passing through the frequency converter. According to the preset circuit, the air supply unit and the exhaust unit work at the maximum power at the moment until a worker repairs the circuit fault, and the air switch 4 and the bypass circuit switch 6 are manually reset.
As shown in fig. 1 to 3, the blower unit is composed of a plurality of blower motors 21 having the same type and power, and the exhaust unit is also composed of a plurality of exhaust motors 22 having the same type and power.
Specifically, in this embodiment, 3 blowing motors 21 with the same type and the same power are respectively used to form a blowing unit, and 3 exhaust motors 22 with the same type and the same power are respectively used to form an exhaust unit. The air supply unit is uniformly controlled by the first frequency converter 11, when the first frequency converter 11 adjusts the air supply unit, each same air supply motor can complete the same response, and under the premise of eliminating errors and faults, the working states of all the air supply motors can be guaranteed to be the same or approximately the same. The same applies to the control of the exhaust fan unit by the second frequency converter 12, which is not described in detail herein. In conclusion, the air supply motors at different positions inside the machinery can work in the same working state, so that the air supply effects at different positions inside the machinery are similar, the air exhaust effects are similar, and the effect of balanced ventilation can be realized by combining the air supply motors and the air exhaust effects.
In addition, the use of a plurality of relatively low power air supply/exhaust motors can effectively reduce noise and vibration. For the air supply/exhaust units with the same ventilation effect, the vibration amplitude generated by a single high-power air supply/exhaust motor cannot be achieved by a plurality of air supply/exhaust motors with smaller power. Moreover, high-power air supply/discharge motors often require a higher total power to drive in order to achieve the same ventilation effect, which also has the disadvantage of uneven ventilation. Therefore, in the embodiment, a plurality of air feeding/exhausting motors with smaller power are adopted to replace the traditional single high-power air feeding/exhausting motor, so that the problems of noise and vibration are solved, a better ventilation effect can be obtained, energy waste can be reduced, and the optimal solution within a limited cost range is provided.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. The utility model provides a ship machinery department ventilation system, ventilation system is including the air supply unit that communicates in the air intake and the exhaust unit that communicates in the air outlet, its characterized in that, ventilation system still includes first converter, second converter and sensor, first converter and second converter with the sensor electricity is connected, the PID module of first converter will the signal processing back output of sensor extremely air supply unit, the PID module of second converter will the signal processing back output of sensor extremely exhaust unit.
2. The ventilation system as claimed in claim 1, wherein the sensors include a pressure sensor and a temperature sensor, the pressure sensor is disposed at the blower unit and electrically connected to the first frequency converter, the pressure sensor outputs the acquired signal to the first frequency converter, the temperature sensor is disposed at the exhaust unit and electrically connected to the second frequency converter, and the temperature sensor outputs the acquired signal to the second frequency converter.
3. The ventilation system as claimed in claim 1, wherein the blower unit includes a plurality of blower motors, and the exhaust unit includes a plurality of exhaust motors, and the blower motors and the exhaust motors are alternately disposed at intervals.
4. The ventilation system as claimed in claim 1, wherein the arrangement of the blower unit and the exhaust unit is symmetrical with respect to a center of the machinery space.
5. The ventilation system of claim 1, wherein the maximum power of the first inverter is not less than 120% of the sum of the maximum powers of all the blowing motors of the blower unit, and the maximum power of the second inverter is not less than 120% of the sum of the maximum powers of all the exhaust motors of the exhaust unit.
6. The ventilation system as claimed in claim 1, wherein the motor circuits of the blower unit and the exhaust unit are provided with thermal relays.
7. The ventilation system according to claim 6, wherein the operation value of the thermal relay is set to 1.05 times of a rated current of the blower unit or the exhaust unit.
8. The ventilation system of claim 1, wherein the inlet switches of the first and second frequency converters are air switches.
9. The ventilation system of claim 8, wherein the exhaust fan unit and the blower unit have a bypass circuit that does not pass through the inverter, the bypass circuit being automatically turned on to directly connect the blower unit and the exhaust fan unit to the power supply when the air switch is tripped.
10. The ventilating system as set forth in claim 1, wherein said blower unit is composed of a plurality of blower motors of the same type and power, and said exhaust unit is composed of a plurality of exhaust motors of the same type and power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110822646.8A CN113619765A (en) | 2021-07-21 | 2021-07-21 | Ventilation system at ship machinery place |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110822646.8A CN113619765A (en) | 2021-07-21 | 2021-07-21 | Ventilation system at ship machinery place |
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| Publication Number | Publication Date |
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| CN113619765A true CN113619765A (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110822646.8A Pending CN113619765A (en) | 2021-07-21 | 2021-07-21 | Ventilation system at ship machinery place |
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| CN (1) | CN113619765A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013906A (en) * | 2022-06-06 | 2022-09-06 | 国家石油天然气管网集团有限公司 | Intelligent ventilation control method and system and electronic equipment |
| CN115195987A (en) * | 2022-06-29 | 2022-10-18 | 中船邮轮科技发展有限公司 | Passenger ship cabin ventilation system and passenger ship |
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| JPH09119696A (en) * | 1995-08-23 | 1997-05-06 | Toshiba Corp | Controller and controlling method for air conditioner |
| JP2011031835A (en) * | 2009-08-05 | 2011-02-17 | Ihi Marine United Inc | Ship engine room ventilation system |
| CN103134148A (en) * | 2011-11-24 | 2013-06-05 | 四川康源医疗设备有限公司 | Air-conditioning system convenient to control in pharmaceutical industry |
| CN203501386U (en) * | 2013-09-24 | 2014-03-26 | 广州三晶电气有限公司 | Frequency conversion driving system of central air conditioner |
| CN205372921U (en) * | 2016-01-04 | 2016-07-06 | 武汉理工大学 | Adaptive variable blast volume air conditioner air supply fan speed controller |
| CN108945380A (en) * | 2018-09-11 | 2018-12-07 | 上海和创船舶工程有限公司 | The automatic adjustment ventilating system and its ventilation parameters method of polar region ship machinery space |
| CN211592900U (en) * | 2020-01-03 | 2020-09-29 | 中国船舶工业集团公司第七0八研究所 | Variable-frequency air intake and exhaust system of marine engine room |
| CN213443064U (en) * | 2020-07-14 | 2021-06-15 | 友联船厂（蛇口）有限公司 | Frequency conversion fan for ventilation system of ship engine room |
-
2021
- 2021-07-21 CN CN202110822646.8A patent/CN113619765A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09119696A (en) * | 1995-08-23 | 1997-05-06 | Toshiba Corp | Controller and controlling method for air conditioner |
| JP2011031835A (en) * | 2009-08-05 | 2011-02-17 | Ihi Marine United Inc | Ship engine room ventilation system |
| CN103134148A (en) * | 2011-11-24 | 2013-06-05 | 四川康源医疗设备有限公司 | Air-conditioning system convenient to control in pharmaceutical industry |
| CN203501386U (en) * | 2013-09-24 | 2014-03-26 | 广州三晶电气有限公司 | Frequency conversion driving system of central air conditioner |
| CN205372921U (en) * | 2016-01-04 | 2016-07-06 | 武汉理工大学 | Adaptive variable blast volume air conditioner air supply fan speed controller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013906A (en) * | 2022-06-06 | 2022-09-06 | 国家石油天然气管网集团有限公司 | Intelligent ventilation control method and system and electronic equipment |
| CN115013906B (en) * | 2022-06-06 | 2023-12-12 | 国家石油天然气管网集团有限公司 | Intelligent ventilation control method and system and electronic equipment |
| CN115195987A (en) * | 2022-06-29 | 2022-10-18 | 中船邮轮科技发展有限公司 | Passenger ship cabin ventilation system and passenger ship |
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Application publication date: 20211109 |
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