JP5751999B2 - Engine power generator - Google Patents

Description

  The present invention relates to an engine power generator.

  2. Description of the Related Art Conventionally, a package-type engine power generation device in which an engine and a generator are housed in a package room is used as a regular power source or an emergency power source for various facilities depending on the purpose of use. This type of engine power generator is configured such that an intake duct is provided in a package chamber, and outside air introduced into the package chamber is supplied to the engine via the intake duct (see, for example, Patent Documents 1 and 2).

  On the other hand, many engines of engine power generators are equipped with a turbocharger and an intercooler. In this case, the compressed air compressed by the turbocharger is cooled by an intercooler, and the compressed air having a higher density is supplied into each cylinder, thereby increasing the charging efficiency of the compressed air in each cylinder and increasing the engine. The combustion efficiency is improved.

Japanese Utility Model Publication No. 2-33286 Japanese Utility Model Publication No. 4-125620

  However, in the conventional technique, when the engine power generation device is installed in a poor environment with a lot of dust, it is easy to suck dust together with air from the intake duct. For this reason, there is a problem that dirty air containing dust is taken into the package chamber and thus into the engine, which tends to cause engine performance deterioration and failure. Moreover, since dust is easily taken into the package chamber and thus the engine, the frequency of maintenance work such as cleaning must be increased, and there is a problem that the burden of the maintenance work is heavy.

  On the other hand, when the temperature of the compressed air (intake air) taken into the engine fluctuates, the intake air amount of the engine fluctuates, and the air-fuel ratio that is the ratio of the intake air flow rate to the fuel flow rate fluctuates. Since fluctuations in the air-fuel ratio adversely affect combustion in the engine, it is preferable to suppress fluctuations in the intake air temperature as much as possible during operation of the engine power generator. However, in the conventional technology, for example, it is not assumed that the engine power generator is used in an environment in which the temperature change is large every year or every day, and it has not been possible to cope with suppressing fluctuations in the intake air temperature.

  Accordingly, the present invention has a technical problem to provide an engine power generation apparatus that has been improved by examining the above-described present situation.

An engine power generator according to claim 1 is an engine, a generator that generates electric power by driving the engine, a package chamber that houses the engine and the generator, and a ventilation chamber that includes a filter member for air purification. A communication duct that allows the ventilation chamber and the package chamber to communicate with each other , and a blower fan that supplies air from the ventilation chamber to the package chamber via the communication duct, and the air taken in by the blower fan In response, a radiator that exchanges heat between the air and the engine coolant is disposed in the ventilation chamber .

According to a second aspect of the present invention, in the engine power generator according to the first aspect , the radiator is disposed downstream of the filter member.

According to a third aspect of the present invention, in the engine power generator according to the second aspect, the filter member, the blower fan, and the radiator are provided on the ventilation chamber side, and the ventilation chamber is independent of the package chamber. Are arranged.

According to a fourth aspect of the present invention, in the engine power generator according to the second or third aspect , a heat exchanger for engine cooling water is provided outside the package chamber separately from the radiator, and the engine and the The said radiator is arrange | positioned in the cooling water system | strain which connects with a heat exchanger.

  According to the engine power generator according to the present invention, an engine, a generator that generates electric power by driving the engine, a package chamber that houses the engine and the generator, a ventilation chamber that has a filter member for air purification, The air filter is provided with a communication duct that allows the ventilation chamber and the package chamber to communicate with each other, and a blower fan that supplies air from the ventilation chamber to the package chamber via the communication duct. Air is sent from the ventilation chamber to the package chamber. Therefore, for example, even if the engine power generation device is installed in a poor environment in which air (outside air) is contaminated, clean air can always be supplied to the engine, and it is easy to maintain engine performance in a good state over a long period of time. The effect of becoming.

Further , a radiator that receives the air taken in by the blower fan and performs heat exchange between the air and engine cooling water is disposed in the ventilation chamber. Even if the engine power generator is installed, air having a suitable temperature is supplied to the package chamber and thus the engine without changing the cooling water system for the radiator regardless of the temperature. it can. Therefore, it is possible to easily suppress the intake air temperature fluctuation of the engine regardless of the temperature, and to avoid the air-fuel ratio fluctuation and stabilize the combustion of the engine.

According to invention of Claim 2 , since the said radiator is arrange | positioned downstream from the said filter member, the air (external air) containing dust is not sprayed directly on the said radiator, but by the said filter member. Dust and purified air will be blown. Therefore, the effect of preventing clogging of the radiator can be exhibited.

According to a third aspect of the present invention, the filter member, the blower fan, and the radiator are provided on the ventilation chamber side, and the ventilation chamber is disposed separately from the package chamber. The package room and the ventilation room can be installed side by side or vertically, depending on the installation location of the power generation device. Therefore, there is an effect that the degree of freedom of the installation layout of the package room and the ventilation room can be improved.

According to the invention of claim 4 , a heat exchanger for engine cooling water is provided outside the package chamber separately from the radiator, and the cooling water system connecting the engine and the heat exchanger includes the heat exchanger. Since the radiator is arranged, the cooling water system for the radiator is included in the cooling water system that connects the engine and the heat exchanger. Therefore, the overall structure of the cooling water system of the engine power generator can be simplified while maintaining a high cooling efficiency of the engine cooling water.

It is a whole side view of an engine power generator. It is a whole top view of an engine power generator. It is an enlarged plan view of an engine. It is a cooling water system diagram of an engine power generator. It is a functional block diagram of the controller in the 1st example. It is a flowchart explaining the air temperature control (engine cooling water temperature control) of the 1st example. It is a graph which shows transition of the air temperature before and behind a radiator at the time of air temperature control (engine cooling water temperature control) execution. It is a functional block diagram of the controller in the 2nd example. It is a flowchart explaining air temperature control of the 2nd example. It is a graph which shows transition of the air temperature before and behind a radiator at the time of air temperature control execution.

  Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings in a case where the present invention is applied to an engine power generator 1 having an engine 21 and a generator 38.

  First, the outline of the engine power generator 1 according to the embodiment will be described with reference to FIGS. 1 and 2. The engine power generator 1 includes a package chamber 2 that houses an engine 21 and a generator 38 that generates electric power by driving the engine 21, a ventilation chamber 3 for taking in air (outside air) introduced into the package chamber 2, A cooling tower 4 for cooling the temperature adjustment water for adjusting the temperature of the engine cooling water and a heat exchanger 5 for exchanging heat between the temperature adjustment water and the engine cooling water are provided. The component devices 2 to 5, that is, the package chamber 2, the ventilation chamber 3, the cooling tower 4, and the heat exchanger 5 are arranged on a grounding base 8. The component devices 2 to 5 of the embodiment are arranged in a line (in series) in the order of the cooling tower 4, the heat exchanger 5, the package room 2, and the ventilation room 3 from the left side of FIGS. 1 and 2. It is installed on the base 8.

  Although details will be described later, a plurality of heat exchangers 5 are arranged to improve the cooling efficiency of the engine coolant. The heat exchanger 5 of the embodiment is arranged in two units, a main and a sub. The main heat exchanger 5 a is for the oil cooler 29 and the cooling water jacket 30, and the sub heat exchanger 5 b is for the intercooler 31.

  Next, the air system of the engine power generator 1 will be described with reference to FIGS. 1 and 2. As shown in FIGS. 1 and 2, an air purification filter member 9 is disposed on the outer surface of the ventilation chamber 3 opposite to the package chamber 2. The surrounding space (outside) of the package chamber 2 communicates with the ventilation chamber 3 through the filter member 9. Although illustration is omitted, the filter member 9 of the embodiment is of an oil bath type having an oil reservoir and a labyrinth (trap shape) internal path. When the air flow suddenly bends due to the labyrinth-like internal path, dust having a mass larger than that of air falls on the surface of the oil by inertia and is captured by the viscosity of the oil. That is, the air taken in from the surrounding space of the package chamber 2 toward the ventilation chamber 3 is removed and purified by the filter member 9.

  The interior of the ventilation chamber 3 is partitioned into two chambers, an intake chamber 3a and a discharge chamber 3b, with an air-cooled radiator 10 interposed therebetween. The radiator 10 is for exchanging heat between the air passing through the filter member 9 and the engine coolant. The suction chamber 3 a of the ventilation chamber 3 communicates with the filter member 9. The discharge chamber 3 b of the ventilation chamber 3 communicates with the package chamber 2 through the communication duct 11. The radiator 10 is located on the downstream side of the filter member 9. In this case, the suction side of the communication duct 11 is connected to a portion of the upper surface side of the ventilation chamber 3 near the discharge chamber 3b. The discharge side of the communication duct 11 is connected to a portion of the upper surface side of the package chamber 2 near the ventilation chamber 3 (discharge chamber 3b).

  On the suction side of the communication duct 11 (also referred to as the discharge side of the discharge chamber 3 b), a blower fan 12 that forcibly sends air outside the package chamber 2 from the ventilation chamber 3 to the package chamber 2 via the communication duct 11 is arranged. Yes. As can be seen from the above description, the ventilation chamber 3 is provided independently of the package chamber 2, and the filter member 9, the radiator 10, and the blower fan 12 are provided not on the package chamber 2 side but on the ventilation chamber 3 side. It has been.

  The package chamber 2 that accommodates the engine 21 and the generator 38 also communicates with the external space via the discharge duct 13. The suction side of the discharge duct 13 is connected to a portion near the heat exchanger 5 on the upper surface side of the package chamber 2. The discharge duct 13 extends upward, and the upper end portion thereof is the discharge side of the discharge duct 13. The air outside the package chamber 2 is sucked into the filter member 9 by the rotational drive of the blower fan 12 to be removed and purified, and sent to the suction chamber 3a of the ventilation chamber 3. Then, the air in the suction chamber 3 a passes through the radiator 10, the discharge chamber 3 b, and the communication duct 11 and flows into the internal space Sp of the package chamber 2. The air in the internal space Sp of the package chamber 2 is discharged out of the package chamber 2 through the discharge duct 13. Although details will be described later, the air flowing into the internal space Sp of the package chamber 2 is sent to the intake side of the engine 21. Exhaust gas from the exhaust side of the engine 21 is discharged out of the package chamber 2.

  Next, the engine 21 and the generator 38 in the package chamber 2 will be described with reference to FIGS. The engine 21 disposed in the package chamber 2 is a so-called gas engine that generates power using a fuel gas such as natural gas. The engine 21 includes a cylinder block 22 having an output shaft (also referred to as a crankshaft, not shown), and a cylinder head 23 mounted on the cylinder block 22. An intake manifold 24 is provided on one side of the cylinder head 23, and an exhaust manifold 25 is provided on the other side.

  The output shaft of the engine 21 extends in a direction along the direction in which the constituent devices 2 to 5 are arranged. In other words, the engine 21 is arranged in the package chamber 2 in a state where the direction of the output shaft is aligned with the arrangement direction of the group of components 2 to 5. In the embodiment, a common base 26 that is long in the direction in which the constituent devices 2 to 5 are arranged is fixed near the center of the base 8. A cylinder block 22 of the engine 21 is attached to a half of the common base 26 near the heat exchanger 5 via a vibration isolator 27. Therefore, the engine 21 is supported by the common base 26 via the vibration isolator 27.

  The generator 38 is disposed closer to the ventilation chamber 3 than the engine 21. The front end side of the output shaft protrudes from the side surface of the cylinder block 22 near the ventilation chamber 3. A generator 38 is connected to the tip side so as to be able to transmit power. The generator 38 is driven to generate power by the constant speed power of the engine 21. The generated power generated by driving the generator 38 is supplied to an arbitrary electric system. In the embodiment, a box frame-like frame frame 39 is provided in a half of the common base 26 near the ventilation chamber 3. A generator 38 is installed on the inner side of the frame 39.

  An oil pan 28 for storing lubricating oil is disposed on the lower surface of the cylinder block 22 in the engine 21. Lubricating oil in the oil pan 28 is sucked by an oil pump (not shown) that is driven by the rotation of the output shaft, and is supplied to the engine via an oil cooler 29 (see FIG. 4) that cools the lubricating oil with engine cooling water. 21 is supplied to each lubrication part. The lubricating oil supplied to each lubricating part is then returned to the oil pan 28. Although not shown, the oil pump and the oil cooler 29 are attached to the cylinder block 22.

  Although not described in detail, a cooling water jacket 30 (see FIG. 4) is formed on the inner side of the cylinder head 23 and the cylinder block 22. By driving the main cooling water pump 57 on the main heat exchanger 5a side, the engine cooling water in the main heat exchanger 5a is supplied to the oil cooler 29 and the cooling water jacket 30 to cool the lubricating oil and the engine 21 itself. . The cooling water contributing to the water cooling is returned to the main heat exchanger 5a.

  An intercooler 31 is attached to the side surface of the cylinder head 23 near the ventilation chamber 3. The intake side of the intercooler 31 is connected to an air cleaner 34 through the compressor 32a and the mixer 33 of the turbocharger 32 and taking in the air in the internal space Sp of the package chamber 2 by dust removal and purification. A gas supply device 35 for supplying fuel gas is also connected to the mixer 33. The discharge side of the intercooler 31 is connected to the intake manifold 24 via the intake throttle valve 36.

  The mixed gas obtained by mixing and stirring the fuel gas and air with the mixer 33 is compressed by the compressor 32a of the turbocharger 32 and becomes high pressure and high temperature. The high-temperature and high-pressure mixed gas is cooled by the intercooler 31 and then sent to the intake manifold 24 via the intake throttle valve 36 and supplied to each cylinder of the engine 21. In the embodiment, the turbocharger 32 is disposed in the vicinity of the exhaust manifold 25, and the mixer 33 and the air cleaner 34 are provided on the upper surface side of the frame frame 39. A gas supply device 35 is provided on one side of the frame frame 39.

  The turbocharger 32 has the above-described compressor 32a with a built-in blower wheel and an exhaust turbine 32b with a built-in turbine wheel. The intake side of the exhaust turbine 32 b is connected to the exhaust manifold 25 of the engine 21. The exhaust side of the exhaust turbine 32 b is connected to the exhaust bend 37. The discharge side of the exhaust bend 37 penetrates the upper surface side of the package chamber 2 and protrudes out of the package chamber 2. Exhaust gas discharged from each cylinder of the engine 21 to the exhaust manifold 25 is discharged from the exhaust bend 37 to the outside of the package chamber 2 via the turbocharger 32.

  Next, the cooling water system of the engine power generator 1 will be described with reference to FIG. As shown in FIG. 4, the cooling tower 4 and the heat exchanger 5 are connected by a temperature-controlled water circulation line 41 that circulates temperature-controlled water between them. The temperature-regulated water circulation pipe 41 is connected to the feed pipe 43 connected from the lower part of the cooling tower 4 to the secondary side 42b of the sub heat exchanger 5b, and from the secondary side 42b of the sub heat exchanger 5b to the main heat exchanger 5a. The relay pipe line 44 connected to the secondary side 42a and the return side pipe line 45 connected to the upper part of the cooling tower 4 from the secondary side 42a of the main heat exchanger 5a are connected. A temperature adjustment water pump 46 for supplying temperature adjustment water to the secondary sides 42 a and 42 b of the heat exchanger 5 group is provided in the feed side pipe line 43. The cooling tower 4 is also connected with a water injection pipe 47 for injecting water therein.

  In the embodiment, the cooling water system of the engine 21 is divided into two systems in order to improve the cooling efficiency of the engine cooling water. These cooling water systems are independent and each is configured in a closed circuit for circulating engine cooling water.

  In the cooling water system on the main heat exchanger 5a side, the main heat exchanger 5a, the oil cooler 29, and the cooling water jacket 30 are connected by a main-side circulation line 51. The main-side circulation circuit 51 includes a feed-side line 53 connected to the oil cooler 29 from the primary side 52a of the main heat exchanger 5a, and a return-side line 54 connected to the primary side 52a of the main heat exchanger 5a from the cooling water jacket 30. It is the structure which connected with.

  The feed-side pipeline 53 and the return-side pipeline 54 are also connected by a bypass pipeline 55. That is, the bypass line 55 is provided so as to bypass the main heat exchanger 5a. A temperature adjustment valve 56 that adjusts the flow of engine cooling water to the bypass pipe 55 is provided at a connection portion between the return side pipe 54 and the bypass pipe 55. A main cooling water pump 57 that supplies engine cooling water toward the oil cooler 29 and the cooling water jacket 30 is provided in the feed side conduit 53. An expansion tank 58 is branchedly connected between the primary side 52 a of the main heat exchanger 5 a and the main cooling water pump 57 in the feed side pipe line 53.

  In the main heat exchanger 5a, heat is exchanged between the temperature adjustment water on the secondary side 42a and the engine cooling water on the primary side 52a. As a result, the engine coolant on the primary side 52a is cooled, and the lubricating oil and the engine 21 itself are cooled with the engine coolant.

  In the cooling water system on the side of the sub heat exchanger 5b, the sub heat exchanger 5b and the intercooler 31 are connected by a sub side circulation line 61. The sub-side circulation circuit 61 includes a first feed side pipe 64 connected from the primary side 62b of the sub heat exchanger 5b to the heat exchange pipe 63 of the radiator 10, and a second feed side pipe connected from the heat exchange pipe 63 to the intercooler 31. The path 65 and the return side pipe line 66 connected from the intercooler 31 to the primary side 62b of the sub heat exchanger 5b are connected to each other.

  The first feed side pipe 64 and the return side pipe 66 are also connected by a bypass pipe 67. That is, the bypass line 67 is provided so as to bypass the sub heat exchanger 5b. A temperature adjustment valve 68 that adjusts the flow of engine cooling water to the bypass pipe 67 is provided at a connection portion between the first feed side pipe 64 and the bypass pipe 67. A sub-cooling water pump 69 that supplies engine cooling water toward the radiator 10 and the intercooler 31 is provided in the first feed-side pipeline 53. An expansion tank 70 is branchedly connected between the temperature control valve 68 and the sub cooling water pump 69 in the first feed side pipe 64.

  In the sub heat exchanger 5b, heat exchange is performed between the temperature adjustment water on the secondary side 42b and the engine cooling water on the primary side 52b. As a result, the engine coolant on the primary side 52b is cooled, and the engine coolant is sent to the intercooler 31, whereby the high-temperature and high-pressure mixed gas is cooled.

  On the other hand, air (dust-removed / purified air) that has passed through the filter member 9 is blown to the radiator 10 by the rotational drive of the blower fan 12 on the ventilation chamber 3 side. Heat exchange is performed between the air passing through the filter member 9 and the engine coolant in the heat exchange pipe 63.

  When the air temperature via the filter member 9 is compared with the engine coolant temperature in the heat exchange pipe 63 in an environment where the temperature is high as in summer, the air temperature via the filter member 9 tends to be higher. . In such a case, when heat exchange is performed between the air passing through the filter member 9 and the engine coolant in the heat exchange pipe 63, the air passing through the filter member 9 is cooled, and the cooled air is packaged. It is sent into the room 2. For example, if the air temperature through the filter member 9 is 55 ° C. and the engine coolant temperature in the heat exchange pipe 63 is 36 ° C., the air temperature is cooled from 55 ° C. to 40 ° C. by passing through the radiator 10. .

  On the contrary, under an environment where the temperature is low as in winter, the engine coolant temperature in the heat exchange pipe 63 tends to be higher than the air temperature via the filter member 9. In such a case, when heat exchange is performed between the air passing through the filter member 9 and the engine coolant in the heat exchange pipe 63, the air passing through the filter member 9 is heated, and the heated air Is sent into the package chamber 2. For example, if the air temperature through the filter member 9 is 10 ° C. and the engine coolant temperature in the heat exchange pipe 63 is 36 ° C., the air temperature is heated from 10 ° C. to 25 ° C. by passing through the radiator 10. It is.

  That is, for example, even if the engine power generation device 1 is installed in an environment where the temperature changes drastically during the year or day, the configuration is suitable without changing the cooling water system for the radiator 10 regardless of the temperature. Air having a proper temperature can be supplied to the package chamber 2 and thus to the engine 21. Therefore, the intake air temperature fluctuation of the engine 21 can be easily suppressed regardless of the temperature, and the combustion of the engine 21 can be stabilized by avoiding the air-fuel ratio fluctuation.

  As is clear from the above description and FIGS. 1 to 3, the engine power generator 1 of the embodiment includes the engine 21, the generator 38 that generates power by driving the engine 21, the engine 21, and the generator 38. , A ventilation chamber 3 having a filter member 9 for purifying air, a communication duct 11 for connecting the ventilation chamber 3 and the package chamber 2, and a communication duct 11 from the ventilation chamber 3 via the communication duct 11. Therefore, the air that has been dust-removed and purified by the filter member 9 can be sent from the ventilation chamber 3 to the package chamber 2. Therefore, for example, even if the engine power generation device 1 is installed in a poor environment where air (outside air) is contaminated, clean air can always be supplied to the engine 21 and the engine performance can be maintained in a good state for a long time. The effect that it becomes easy to do is produced.

  Further, as is clear from the above description and FIGS. 1, 2, and 4, the engine power generator 1 according to the embodiment receives the air taken in by the blower fan 12, Since the radiator 10 is further provided for performing heat exchange, for example, even if the engine power generation device 1 is installed in an environment where the temperature changes drastically during the year or day, the cooling water for the radiator 10 is maintained regardless of the temperature. The air at a suitable temperature can be supplied to the package chamber 2 and thus to the engine 21 with the same configuration without changing the system. Therefore, regardless of whether the temperature is high or low, fluctuations in the intake air temperature of the engine 21 can be easily suppressed, and the combustion of the engine 21 can be stabilized while avoiding fluctuations in the air-fuel ratio.

  As is clear from the above description and FIGS. 1 and 2, the radiator 10 is disposed on the downstream side of the filter member 9. Therefore, air containing dust (outside air) is directly blown onto the radiator 10. Instead, the air that has been dust-removed and purified by the filter member 9 is blown. Therefore, the effect of preventing clogging of the radiator 10 can be exhibited.

  As apparent from the above description and FIGS. 1 and 2, the filter member 9, the blower fan 12, and the radiator 10 are provided on the ventilation chamber 3 side, and the ventilation chamber 3 is connected to the package chamber 2. Are arranged separately and independently, the package chamber 2 and the ventilation chamber 3 can be installed side by side or vertically in accordance with the installation location of the engine power generator 1. Therefore, there is an effect that the degree of freedom of the installation layout of the package room 2 and the ventilation room 3 can be improved.

  As apparent from the above description and FIGS. 1, 2, and 4, a heat exchanger 5 for engine cooling water is provided outside the package chamber 2 separately from the radiator 10, and the engine 21. Since the radiator 10 is disposed in the cooling water system 61 that connects the heat exchanger 5 and the cooling water system 61, the cooling water system for the radiator 10 connects the cooling water that connects the engine 21 and the heat exchanger 5. It will be included in the system 61. Therefore, the overall structure of the cooling water system of the engine power generator 1 can be simplified while maintaining the cooling efficiency of the engine cooling water at a high level.

  Next, a first example of a structure that performs air temperature control (engine cooling water temperature control) of the engine power generator 1 will be described with reference to FIGS. 1, 2, and 5. In the first example, the engine power generation device 1 has a controller 81 as a valve control device. The controller 81 is configured to adjust the opening degree of each of the temperature control valves 56 and 68 based on detection results of cooling water temperature sensors 86a and 86b as cooling water temperature detectors described later. The cooling water temperature sensor 86a corresponds to the main-side circulation pipe 51a, and the cooling water temperature sensor 86b corresponds to the sub-side circulation pipe 61.

  In the first example, in the sub-side circulation pipe 61, when the detection result Tw of the sub-side cooling water temperature sensor 86b is higher than a preset set temperature To (for example, about 36 ° C.), the sub-side temperature control valve The amount of engine cooling water passing through the bypass pipe 67 is reduced by 68 and a large amount of engine cooling water passing through the sub heat exchanger is caused to flow into the radiator 10 to lower the temperature of the engine cooling water sent to the radiator 10. When the detection result Tw of the sub cooling water temperature sensor 86b is equal to or lower than the set temperature To, the amount of engine cooling water passing through the bypass pipe 67 is increased by the sub temperature control valve 68, and the engine cooling water flowing into the radiator 10 is increased. Increase the temperature. In this way, the temperature of the engine coolant flowing into the radiator 10 is maintained at the set temperature To.

  The controller 81 of the first example includes a CPU 82 for executing various arithmetic processes, a ROM 83 for storing control programs and data, a RAM 84 for temporarily storing control programs and data, a clock as a timer function, a sensor, an actuator, and the like. And an input / output interface for exchanging data between them. Cooling water temperature sensors 86a and 86b as cooling water temperature detectors for detecting the temperature Tw of engine cooling water entering the heat exchange pipe 63 of the radiator 10 (hereinafter referred to as cooling water temperature) are connected to the input / output interface of the controller 81, The sub-side temperature control valves 56 and 68 and a main switch 89 for turning on and off the power supply of the entire engine power generator 1 are electrically connected.

  Next, the air temperature control (engine coolant temperature control) of the first example will be described with reference to FIGS. 6 and 7. Note that the algorithm shown in the flowchart of FIG. 6 is stored as a program in the ROM 83 of the controller 81 and is read by the RAM 84 and then executed by the CPU 82. The air temperature control of the first example is applied in the sub-side circulation pipeline 61.

  As shown in the flowchart of FIG. 6, following the start, the controller 81 reads the detection result Tw (cooling water temperature) of the cooling water temperature sensor 86b on the sub side (S01), and the cooling water temperature Tw is set to a preset temperature To. It is determined whether the temperature is higher than (for example, about 36 ° C.) (S02). When the cooling water temperature Tw is higher than the set temperature To (Tw> To, S02: YES), the sub-side temperature control valve 68 is closed to reduce the amount of engine cooling water via the bypass pipe 67 (S03). When the cooling water temperature Tw is equal to or lower than the set temperature To (Tw ≦ To, S02: NO), the sub-side temperature control valve 68 is opened to increase the amount of engine cooling water via the bypass line 67 (S04). In this way, the temperature Tw of the engine coolant flowing into the radiator 10 is maintained at the set temperature To.

  Then, in the radiator 10, since heat exchange between the air taken in by the blower fan 12 and the engine cooling water is executed (S05), the air temperature Ta in the suction chamber 3a is higher than the cooling water temperature Tw ( In an environment where the temperature is high as in summer, the air after passing through the radiator 10 is cooled by heat exchange in the radiator 10. Conversely, in an environment where the cooling water temperature Tw is higher than the air temperature Ta in the suction chamber 3a (in an environment where the temperature is low as in winter), the air after passing through the radiator 10 is added by heat exchange in the radiator 10. Be warmed. That is, the air temperature Tb after passing through the radiator 10 is maintained in a predetermined temperature range. Note that this control ends when the main switch 89 is turned off (S06: NO).

  Therefore, for example, even if the engine power generation device 1 is installed in an environment where the temperature changes drastically during the year or day, the configuration is suitable without changing the cooling water system for the radiator 10 regardless of the temperature. Air having a proper temperature can be supplied to the package chamber 2 and thus to the engine 21. Regardless of whether the temperature is high or low, fluctuations in the intake air temperature of the engine 21 can be easily suppressed, and fluctuations in the air-fuel ratio can be avoided and stabilization of combustion in the engine 21 can be promoted.

  FIG. 7 shows the result of air temperature control (engine cooling water temperature control) by the controller 81. As shown in FIG. 7, when the air temperature Ta in the suction chamber 3a is in the range of about 20 ° C. to 50 ° C., the air temperature Tb after passing through the radiator 10 is approximately 36 ° C. by heat exchange in the radiator 10. It can be seen that it is maintained at the specified temperature. When the air temperature Ta in the suction chamber 3a is about 50 ° C. or more or about 20 ° C. or less, the air temperature Ta influences the effect of heat exchange in the radiator 10 but the air after passing through the radiator 10 It can be seen that the temperature Tb is brought close to approximately 36 ° C. (specified temperature).

  As apparent from the above description and FIGS. 5 to 7, according to the first example, the engine 21, the generator 38 that generates electric power by driving the engine 21, and the engine 21 and the generator 38 are accommodated. The flow of the engine cooling water to the package chamber 2, the heat exchanger 5b and the radiator 10 disposed in the circulation pipe 61 through which the engine cooling water circulates, and the bypass pipe 67 that bypasses the heat exchanger 5b is adjusted. A temperature control valve 68 for controlling, a coolant temperature detecting body 86b for detecting a temperature Tw of engine coolant flowing into the radiator 10, and an opening degree of the temperature control valve 68 based on a detection result of the coolant temperature detecting body 86b. And a blower fan 12 for supplying air to the package chamber 2, and the radiator 10 is taken in by the blower fan 12. The result is that the temperature Tw of the engine cooling water flowing into the radiator 10 is maintained at the set temperature To by adjusting the opening degree of the temperature control valve 68. Since the air temperature Tb after passing through the radiator 10 is maintained in a predetermined temperature range, for example, even if the engine power generation device 1 is installed in an environment where the temperature changes drastically during the year or day, regardless of whether the temperature is high or low, Air having a suitable temperature can be efficiently supplied to the package chamber 2 and thus to the engine 21. Therefore, regardless of the temperature, the intake air temperature fluctuation of the engine 21 can be easily suppressed, and the air-fuel ratio fluctuation can be avoided to stabilize the combustion of the engine 21.

  Further, in the first example, the radiator 10 and the blower fan 12 are provided on the side of the ventilation chamber 3 that is disposed independently of the package chamber, and therefore, according to the installation location of the engine power generator 1. Thus, the ventilation chamber 3 and the package chamber 2 can be installed side by side or vertically. Therefore, there is an effect that the degree of freedom of the installation layout of the package room 2 and the ventilation room 3 can be improved.

  Next, a second example of a structure for executing air temperature control of the engine power generator 1 will be described with reference to FIGS. 1, 2, and 8. As shown in FIGS. 1 and 2, a control panel 90 having a controller 91 or the like as a fan control device is attached to the outer surface of the ventilation chamber 3. The controller 91 in the control panel 90 drives the blower fan 12 based on the detection results of a temperature sensor 95 and a cooling water temperature sensor 96b, which will be described later, and suppresses temperature fluctuations of the air supplied to the package chamber 2 and thus the engine 21. Temperature control is executed. In addition, what is called an axial fan with which the ventilation direction and a rotating shaft direction correspond is employ | adopted for the ventilation fan 12 of embodiment.

  The controller 91 of the second example includes, in addition to a CPU 92 that executes various arithmetic processes, a ROM 93 that stores control programs and data, a RAM 94 that temporarily stores control programs and data, a clock as a timer function, a sensor, an actuator, and the like And an input / output interface for exchanging data between them. At the input / output interface of the controller 91, an engine cooling which enters a temperature sensor 95 as an air temperature detector for detecting an air temperature Ta (air temperature before passing through the radiator 10) in the suction chamber 3 a and a heat exchange pipe 63 of the radiator 10. A sub-side cooling water temperature sensor 96b serving as a cooling water temperature detecting body for detecting the water temperature Tw (hereinafter referred to as cooling water temperature), a motor control unit 98 for the fan motor 97 for rotationally driving the blower fan 12, and the entire engine generator 1 A main switch 99 and the like for turning on and off the power are electrically connected. The temperature sensor 95 of the second example is disposed inside the suction chamber 3a. The temperature sensor 85 may be disposed at an appropriate location upstream of the radiator 10.

  Next, a second example of air temperature control will be described with reference to FIGS. 9 and 10. As shown in the flowchart of FIG. 9, following the start of the air temperature control, the controller 91 detects the detection result Ta (air temperature in the suction chamber 3a) of the temperature sensor 95 and the detection result Tw (cooling water temperature) of the cooling water temperature sensor 96b. ) Is read (S11), and a temperature difference Di between the air temperature Ta and the cooling water temperature Tw is calculated (S12). In this case, the cooling water temperature Tw becomes the reference value (boundary value, see FIG. 10) of the air temperature Tb after passing through the radiator 10. And based on the temperature difference Di calculated | required by step S12, the rotational speed of the fan motor 97 is set so that the air temperature Tb after passing the radiator 10 may become the same as the cooling water temperature Tw, and the ventilation fan 12 is rotationally driven. (S13). The control ends when the main switch 99 is turned off (S14: NO).

  In the second example, since the cooling water temperature Tw is approximately 36 ° C., the fan motor 87 and thus the blower fan 12 are increased as the air temperature Ta in the suction chamber 3a leaves 36 ° C. (specified temperature) with 36 ° C. as the boundary (specified temperature). Is set to increase the rotation speed. FIG. 10 shows the result of air temperature control by the controller 91. As shown in FIG. 10, when the air temperature Ta in the suction chamber 3a is in the range of about 20 ° C. to 50 ° C., the rotational drive of the blower fan 12 surpasses the influence of the temperature difference Di, and the radiator 10 It can be seen that the air temperature Tb after passing is maintained at approximately 36 ° C. (specified temperature). When the air temperature Ta in the suction chamber 3a is about 50 ° C. or more or about 20 ° C. or less, the temperature difference Di is more than the rotational drive of the blower fan 12, but the air temperature Tb after passing through the radiator 10 It can be seen that the result is close to approximately 36 ° C. (specified temperature).

  As apparent from the above description and FIGS. 8 to 10, according to the second example, the engine 21, the generator 38 that generates electric power by driving the engine 21, and the engine 21 and the generator 38 are accommodated. A package chamber 2, a blower fan 12 that supplies air to the package chamber 2, a radiator 10 that receives air taken in by the blower fan 12 and performs heat exchange between the air and engine cooling water, and the blower And a fan control device 81 for controlling the drive of the fan 12. The fan control device 81 controls the drive of the blower fan 12 so that the air temperature Tb after passing through the radiator 10 becomes a specified temperature Tw. Therefore, in this case as well, as in the first example, the intake air temperature fluctuation of the engine 21 can be easily suppressed regardless of the temperature, and the air-fuel ratio fluctuation can be avoided. There is an effect that it promotes the stabilization of the engine 21 combustion.

  Further, in the case of the second example, the fan control device 81 determines that the air temperature Ta before passing through the radiator 10 is the specified temperature, with the case where the air temperature Ta before passing through the radiator 10 matches the specified temperature Tw as a boundary. Since the rotational speed of the blower fan 12 increases as the distance from Tw increases, heat exchange between the air passing through the radiator 10 and the engine coolant is efficiently performed, and the air temperature Tb after passing through the radiator 10 is accurately adjusted. There is an effect that can be done.

  Furthermore, in the case of the second example, the radiator 10 and the blower fan 12 are provided on the side of the ventilation chamber 3 arranged independently of the package chamber, and the fan control device 81 is provided in the ventilation chamber 3. Therefore, the ventilation chamber 3 including the fan control device 81 and the package chamber 2 can be installed side by side or vertically, depending on the installation location of the engine power generation device 1. Therefore, there is an effect that the degree of freedom of the installation layout of the package room 2 and the ventilation room 3 can be improved. Particularly in the second example, the fan control device 81 is included in the ventilation chamber 3 and can be handled as a unit, which is effective in improving the degree of freedom of the installation layout.

  In the second example, since the axial fan as the blower fan 12 is arranged on the suction side of the communication duct 11 that connects the ventilation chamber 3 and the package chamber 2, the blower fan 12 (axial fan). Therefore, there is an advantage that it is easy to adjust the static pressure in the package chamber 2 (static pressure control).

  In addition, the structure of each part is not limited to embodiment of illustration, A various change is possible in the range which does not deviate from the meaning of this invention.

Sp interior space (package room)
DESCRIPTION OF SYMBOLS 1 Engine power generator 2 Package room 3 Ventilation room 5 Heat exchanger 9 Filter member 10 Radiator 11 Communication duct 12 Blower fan 21 Engine 38 Generator 51 Main side circulation line 61 Sub side circulation line

Claims (4)

Engine,
A generator for generating electricity by driving the engine;
A package chamber for housing the engine and the generator;
A ventilation chamber having a filter member for air purification;
A communication duct for communicating the ventilation chamber and the package chamber;
A blower fan that supplies air from the ventilation chamber to the package chamber via the communication duct ;
A radiator that receives the air taken in by the blower fan and performs heat exchange between the air and the engine coolant is disposed in the ventilation chamber.
Engine power generator. The radiator is disposed downstream of the filter member;
The engine power generator according to claim 1. The filter member, the blower fan, and the radiator are provided on the ventilation chamber side, and the ventilation chamber is disposed separately from the package chamber,
The engine power generator according to claim 2. Outside the package chamber, a heat exchanger for engine cooling water is provided separately from the radiator, and the radiator is arranged in a cooling water system that connects the engine and the heat exchanger.
The engine power generator according to claim 2 or 3.

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