JP2008045490A - Sound insulation type engine generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound insulation type engine generator capable of delaying occurrence of overheat by improving cooling water cooling efficiency at a radiator even when ambient temperature rises with caused by fire and extending electricity supply to a fire-fighting load such as a hydrant pump. <P>SOLUTION: In the sound insulating type engine generator storing a water cooling diesel engine 11 and a generator 12 driven by the water cooled engine in a box body 14, and provided with a suction duct 19 introducing outside air sucked from a suction port 18 into the box body and an exhaust duct 21 exhausting heated air passing through the radiator 23 to an outside of the box body from an exhaust port 20, an emergency suction port shutter 25 and an emergency exhaust shutter 26 are provided on the box body as a suction and an exhaust means for supplying cooling air to the radiator without making the same passing through the suction duct and the exhaust duct, and those emergency shutters are opened to increase cooling air in an emergency. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a soundproof engine power generator, and more particularly to a soundproof engine power generator in which an engine and a generator are housed in a box having a soundproof structure for insulating engine sound and the like.

  There are two types of engine generators that drive generators such as diesel engines and gas turbine engines. The open type with each device exposed and the cubicle type in which each device is stored in a box. There are soundproof type and non-soundproof type. The soundproof type engine power generator uses a box having a sound insulation structure and also uses a duct having sound insulation at the intake and exhaust ports (see, for example, Patent Document 1).

  A water cooling system is generally used for cooling diesel engines and the like. In this water cooling system, cooling water is circulated through the engine and the radiator, and the cooling water heated inside the engine is cooled by heat exchange with the cooling air using the radiator. A fan is provided in the vicinity of the radiator, and outside air is sucked into the box body from the intake port through the intake duct by the fan, and the heated air that has passed through the radiator passes through the exhaust duct from the exhaust port to the box. It is designed to be exhausted outside the body.

If the temperature of the cooling water rises for some reason, it becomes impossible to cool the engine, and the engine will burn and become inoperable. In order to prevent this seizure, the engine is automatically stopped when the cooling water temperature rises to a specified temperature or higher, or when a so-called overheating state occurs.
Japanese Utility Model Publication No. 3-111156

  When an engine power generator is used as an emergency power source in the event of a power outage, a soundproof engine power generator is generally installed in the basement of the building to suppress noise during operation. In addition to supplying electric power, it is also used as a power source for driving a fire hydrant pump when a power failure occurs due to a fire.

  On the other hand, the normal soundproof type engine power generator is set so that it can be operated normally at an ambient temperature of 40 ° C. or less. Therefore, when the ambient temperature exceeds 40 ° C., the radiator performs heat exchange with the cooling water. Since the temperature of the air rises, the engine is likely to overheat. Therefore, when operating with a simple power failure, the soundproof engine generator will not be overheated, but when operating with a power failure caused by a fire, the ambient temperature exceeds 40 ° C due to the heat at the time of the fire. May rise, and overheating is likely to occur.

  However, if the engine overheats due to an increase in ambient temperature due to a fire and the engine automatically stops, the power generation to the firefighting load such as a fire hydrant pump is stopped, although the engine power generator itself will not burn and be damaged. As a result, fire fighting activities may be hindered, and as a result, fire damage may increase. That is, in order to protect the engine of the engine power generation device from seizing, there is a risk that the damage of the fire will be expanded.

  Therefore, the present invention can improve the cooling water cooling efficiency in the radiator even when the ambient temperature of the soundproof type engine power generator rises due to a fire or the like, thereby delaying the occurrence of overheating, and the fire fighting load such as a fire hydrant pump. An object of the present invention is to provide a soundproof type engine power generator capable of extending the power supply to the vehicle.

  In order to achieve the above object, a soundproof type engine power generator according to the present invention stores a water-cooled engine and a generator driven by the water-cooled engine in a box, and the outside air sucked from an intake port is stored in the box. In a soundproof type engine power generator comprising an intake duct to be introduced into the body and an exhaust duct for exhausting the heated air that has passed through the radiator of the water-cooled engine from the exhaust port to the outside of the box body, Intake and exhaust means for supplying cooling air to the radiator without passing through the duct and the exhaust duct is provided.

  Furthermore, in the soundproof type engine power generator of the present invention, the intake / exhaust means is an emergency intake port and an emergency exhaust port provided separately from the intake port and the exhaust port. Each of the exhaust ports is provided with opening / closing means that opens in an emergency.

  Further, at least a part of the power generated by the generator is used as a power source for driving a fire fighting load such as a fire hydrant pump, the emergency is when a fire occurs, and the opening and closing means is a fire fighting load such as a fire hydrant pump. It opens by the signal which detected the action | operation and the action | operation of a fire alarm. Further, the intake / exhaust means includes a fan for promoting intake / exhaust, the intake duct and the exhaust duct are detachably provided on the box, and the intake / exhaust means is provided in the intake duct and the exhaust. It is a means for removing the duct from the box.

  According to the soundproof type engine power generator of the present invention, when the ambient temperature rises due to a fire, the air around the box is directly supplied to the radiator and exhausted without passing through the intake duct or the exhaust duct. As compared with the case where the exhaust duct is passed through, the ventilation resistance can be greatly reduced, and the air volume of heat exchanged by the radiator is increased, so that the cooling efficiency of the cooling water is increased. Therefore, even when the ambient temperature rises, the occurrence of overheating can be delayed, and power supply to a fire fighting load such as a fire hydrant pump can be performed longer than before.

  1 to 5 show an embodiment of a soundproof type engine power generator according to the present invention. FIG. 1 is a sectional front view for explaining an air flow in an emergency, and FIG. FIG. 3 is a front view of a soundproof type engine power generator, FIG. 4 is a right side view of the soundproof type engine power generator, and FIG. 5 is a left side view of the soundproof type engine power generator. FIG. 6 is an explanatory diagram showing the relationship between the ambient temperature and cooling water temperature when the ambient temperature rises during normal operation and the engine stop due to the occurrence of overheating, and FIG. 7 is the ambient temperature when the ambient temperature rises due to the occurrence of a fire. It is explanatory drawing which shows the relationship between engine temperature by cooling water temperature and overheat generation | occurrence | production.

  First, the soundproof type engine power generator is a so-called cubicle type engine power generator in which a water-cooled diesel engine 11, a generator 12 driven by the water-cooled engine 11, and a control device 13 are housed in a box 14. Device. Two inspection doors 15 and 15 are provided in front of the box body 14, a fuel tank 16 is provided below the floor, and an exhaust silencer 17 is provided on the ceiling.

  Further, an intake port 18 for introducing cooling air and combustion air into the box body is opened downward on the right side surface of the box body 14, and an intake duct 19 is provided continuously to the intake port 18. It has been. Further, an exhaust duct 21 having an exhaust port 20 opened to the upper side is provided on the left side surface of the box body 14, and an opening portion 22 between the box body 14 and the inflow portion of the exhaust duct 21 is provided in the opening portion 22. A radiator 23 for cooling the engine cooling water by exchanging heat between the engine cooling water and the cooling air, and a fan 24 for circulating the cooling air through the radiator 23 are arranged.

  In the soundproof type engine power generator shown in this embodiment, an emergency intake shutter 25 serving as an emergency intake port is provided at the lower right side of the box body 14, and an emergency exhaust port is provided at the lower side of the exhaust duct 21. An emergency exhaust shutter 26 is provided. The emergency intake shutter 25 and the emergency exhaust shutter 26 are formed so as to be fully closed during normal operation and to be opened only when a fire occurs.

  Appropriate sound absorbing materials and vibration isolating materials are attached to the box body 14, the intake duct 19 and the exhaust duct 21, and the intake duct 19 and the exhaust duct 21 do not leak the noise in the box body 14 directly to the outside. And is formed to have the minimum required flow passage cross-sectional area that can secure the amount of cooling air required by the radiator 23 at a set ambient temperature or lower, for example, 40 ° C. or lower. By arranging a sound insulating plate in the flow path, the noise level around the soundproof type engine power generation device is 85 dB (A) compared to the noise level of 100 to 110 dB (A) in the open type or non-soundproof type engine power generation device. A) Below or 75 dB (A).

  In the soundproof type engine power generator thus formed, the emergency intake shutter 25 and the emergency exhaust shutter 26 are both in a fully closed state during normal operation used as an emergency power supply due to a general power failure. As shown by the arrows, the cooling air and the combustion air are introduced from the intake port 18 through the intake duct 19 into the box body 14, and a part of the air in the box body 14 is used for combustion of the diesel engine 11. In addition, most of the air passes through the radiator 23 by the action of the fan 24 to cool the engine coolant and raise the temperature of the air itself. The heated air passes through the exhaust duct 21 from the opening 22 and is discharged to the outside from the exhaust port 20.

  In this normal operation, as shown in FIG. 6, when the ambient temperature is equal to or lower than the set maximum temperature of 40 ° C., the cooling water temperature gradually rises with the start of operation of the diesel engine 11, but for cooling by the radiator 23. By heat exchange with air, the heat generation amount of the engine and the heat radiation amount of the radiator are balanced at a constant temperature of about 90 ° C., so that a stable operation state is achieved.

  If the ambient temperature rises for some reason in this normal operation state, the temperature of the cooling air flowing into the box body 14 rises and the cooling water cooling efficiency in the radiator 23 decreases, so the cooling water temperature is also the ambient temperature. It gradually rises with the rise of. Then, when the cooling water temperature rises to a preset protection device set point, for example, 100 ° C., the protection device that detects the occurrence of overheating is activated, and the diesel engine 11 is stopped to prevent seizing.

  Therefore, during normal operation, when the cooling water temperature rises to the protection device set point due to an increase in ambient temperature or other causes, such as a failure of the cooling water pump, the protection device is activated and the engine 11 is prevented from being burned. However, since the generator 12 is also stopped at the same time, the power supply to the lighting, the outlet and the like is also stopped.

  On the other hand, when the ambient temperature rises due to a fire, both the emergency intake shutter 25 and the emergency exhaust shutter 26 are opened manually or by a fire occurrence signal. Thereby, as shown by the arrows in FIG. 1, the cooling air and the combustion air directly flow into the box body 14 through the opened emergency intake shutter 25, and the heated air exchanged by the radiator 23 is It is discharged to the outside of the box 14 through the opened emergency exhaust shutter 26. A part of the air passes through the intake duct 19 and the exhaust duct 21.

  In this state, the emergency intake shutter 25 and the emergency exhaust shutter 26 are in a state in which the inside and the outside of the box body 14 are in direct communication with each other, so that the intake and exhaust are performed through the intake duct 19 and the exhaust duct 21 shown in FIG. Ventilation resistance is reduced. As a result, a larger amount of cooling air than normal is supplied to the radiator 23, so that the cooling water cooling efficiency in the radiator 23 is improved.

  Therefore, as shown in FIG. 7, when the ambient temperature rises in the same way, the cooling water temperature can be lowered compared to the normal time. For example, when the ambient temperature rises to about 50 ° C., the protection device is activated. When the emergency intake shutter 25 and the emergency exhaust shutter 26 are opened in the event of a fire, the protective device does not operate until the ambient temperature rises to about 70 ° C. The time from the start of temperature rise until the diesel engine 11 stops due to overheating can be extended significantly from the normal time, power supply to the fire fighting load such as a fire hydrant pump is continued, and the fire fighting activities are supported to prevent damage. Expansion can be prevented (life extension time A).

  At this time, when the emergency intake shutter 25 and the emergency exhaust shutter 26 are opened, engine noise or the like leaks to the outside and a large noise is generated. However, since it is an emergency of fire occurrence, the noise becomes a problem. There is nothing. Further, by opening the emergency intake shutter 25 and the emergency exhaust shutter 26 and releasing the protection device, it is possible to operate until the cooling water temperature rises above the protection device set point and the diesel engine 11 is burned. In this case, although the diesel engine 11 is damaged and becomes unusable, it can be said that it is a small damage compared to the damage when the water supply from the fire hydrant stops and the damage increases (life extension time B).

  In this embodiment, the emergency operation at the time of a fire has been described as an example. However, even during normal operation, the cooling water temperature rises to the protection device set point due to an increase in ambient temperature due to an abnormal temperature rise in summer. In this case, the emergency intake shutter 25 and the emergency exhaust shutter 26 are opened before the protective device is activated, and the operation time can be extended by lowering the cooling water temperature as described above. However, in this case, it is necessary to consider inconvenience due to the generation of noise, and it is preferable to limit it to, for example, during surgery in a hospital.

  Further, in this embodiment, an emergency intake shutter 25 that directly communicates the inside and outside of the box body 14 is provided as intake / exhaust means for supplying cooling air to the radiator 23 without passing through the intake duct 19 and the exhaust duct 21. The emergency intake port provided and the emergency exhaust port provided with the emergency exhaust shutter 26 were used. However, various means are adopted as the intake and exhaust means as long as more cooling air can be supplied to the radiator 23 than usual. be able to.

  For example, in addition to the radiator fan, ambient air is forcibly introduced into the box 14 upstream of the radiator 23, or a fan is provided for forcibly discharging the heated air downstream of the radiator 23. In addition, for example, the lower half of the exhaust duct 21 in the present embodiment may be removed so that the whole or a part of the intake duct 19 and the exhaust duct 21 can be removed from the box body 14. May be opened.

  Furthermore, the emergency intake shutter 25 for emergency intake and the emergency exhaust shutter 26 for emergency exhaust are normally sealed and open / close means for opening in an emergency is optional. Conventionally, this type of open / close means has been used. Various open / close means can be employed, and can be easily formed by, for example, a combination of an electromagnet that maintains a closed state and a spring that biases in the opening direction.

  Also, the timing to open the emergency air intake and the emergency exhaust port is when a signal at the time of a fire or a signal to start surgery in the hospital, such as a signal that detects the operation of a fire hydrant pump or the operation of a fire alarm, is received. It may be when the cooling water temperature reaches the protection device set point after receiving this signal.

It is a cross-sectional front view for demonstrating the flow of the air in emergency. It is a cross-sectional front view for demonstrating the flow of air at the normal time. It is a front view of a soundproof type engine power generator. It is a right view of a soundproof type engine power generator. It is a left view of a soundproof type engine power generator. It is explanatory drawing which shows the relationship between the ambient temperature when the ambient temperature rises at the time of normal driving | operation, a cooling water temperature, and the engine stop by overheat generation. It is explanatory drawing which shows the relationship between the engine temperature by ambient temperature and cooling water temperature when an ambient temperature rises by generation | occurrence | production of a fire, and overheat generation.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Diesel engine, 12 ... Generator, 13 ... Control device, 14 ... Box, 15 ... Inspection door, 16 ... Fuel tank, 17 ... Exhaust silencer, 18 ... Intake port, 19 ... Intake duct, 20 ... Exhaust port , 21 ... Exhaust duct, 22 ... Opening, 23 ... Radiator, 24 ... Fan, 25 ... Emergency intake shutter, 26 ... Emergency exhaust shutter

Claims (6)

  The water-cooled engine and the generator driven by the water-cooled engine are housed in the box, and the intake duct that introduces outside air sucked from the air intake into the box and the radiator of the water-cooled engine are passed. In the soundproof type engine power generator having an exhaust duct for exhausting the temperature rising air from the exhaust port to the outside of the box, cooling air is supplied to the radiator without passing through the intake duct and the exhaust duct. A soundproof type engine power generator provided with intake / exhaust means for performing   The intake / exhaust means is an emergency intake port and an emergency exhaust port provided separately from the intake port and the exhaust port, and both the emergency intake port and the emergency exhaust port are opened and closed in an emergency. 2. The soundproof type engine power generator according to claim 1, wherein each means is provided.   The soundproof engine power generator according to claim 2, wherein at least a part of the power generated by the generator is used as a power source for a fire fighting load, and the emergency is when a fire occurs.   4. The soundproof engine power generator according to claim 3, wherein the opening / closing means is opened by a signal that detects the operation of the fire fighting load and the operation of a fire alarm.   5. The soundproof engine power generator according to any one of claims 1 to 4, wherein the intake / exhaust means includes a fan for promoting intake / exhaust.   2. The intake duct and the exhaust duct are detachably provided on the box, and the intake / exhaust means is means for removing the intake duct and the exhaust duct from the box. The soundproof type engine power generator as described.

Images