JP2010101268A - Private power generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a private power generator eliminating useless cooling-down operation when an engine transfers to a stopping state before the temperature of an engine rises. <P>SOLUTION: This private power generator 10 supplies electric power by operating a generator 12 by the engine 11. The private power generator 10 performs the cooling-down operation for operating an auxiliary machine 21 such as an engine cooling water pump 21a, a lubricating oil priming pump 21b and an engine ambient air ventilating fan 21c for a predetermined operation time after a stopping command of the engine 11. Just before transferring to stopping of the engine 11, when the lubricating oil temperature of the engine 11 is continuously the predetermined temperature or below for a predetermined temperature monitoring time, the cooling-down operation is omitted. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a private power generation apparatus that operates a generator with an engine and supplies power.

  2. Description of the Related Art Conventionally, in a private power generation apparatus that operates a generator with an engine and supplies power, a configuration for cooling down the engine when the engine is stopped is conventionally known.

  In other words, in a conventional private power generation apparatus that performs cooling down, an auxiliary machine such as an engine cooling water pump, a lubricating oil priming pump, and an engine ambient air ventilation fan is operated for a predetermined time after the engine stop command to cool the engine. It is like that. Moreover, after interrupting the circuit breaker which interrupts supply of generated electric power and stopping power transmission, an engine as described above may be operated for a predetermined time to cool the engine (for example, refer to Patent Document 1 below).

  In such a conventional private power generator, cooling down is performed uniformly without considering the temperature state of the engine.

For example, before the time has elapsed since the start of the engine, troubles such as the occurrence of overcurrent on the generator side and troubles such as poor ignition on the engine side may occur, thereby stopping the engine. Then, although the temperature of the engine has not risen so much, cooling down is performed for a predetermined time, and unnecessary cooling down operation is performed.
JP-A-11-355962

  Then, this invention makes it a subject to provide the private power generation device which can abbreviate | omit useless cooling down driving | operation when it transfers to a stop state before the temperature of an engine rises.

  In order to solve the above problems, the present invention is an in-house power generator that operates a generator with an engine and supplies power, and includes auxiliary equipment such as an engine cooling water pump, a lubricating oil priming pump, and an engine ambient air ventilation fan. In the private power generation apparatus that performs a cooling down operation that operates for a predetermined operation time after the engine stop command, the engine lubricating oil temperature continues below a predetermined temperature for a predetermined temperature monitoring time immediately before the engine stop transition. In such a case, a private power generation device is provided in which the cooling-down operation is omitted.

  According to the private power generator according to the present invention, the cooling down operation is omitted when the lubricating oil temperature of the engine is continuously lower than the predetermined temperature for the predetermined temperature monitoring time immediately before the stop of the engine. Therefore, useless cooling down operation can be omitted.

  Examples of the predetermined temperature monitoring time include about 0.5 minutes to 30 minutes or more, and examples of the predetermined temperature include about 60 ° C. to 80 ° C.

  As described above, according to the present invention, it is possible to provide a private power generation device that can omit a useless cooling down operation in the case of shifting to a stop state before the temperature of the engine rises.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the following embodiment is an example which actualized this invention, Comprising: The thing of the character which limits the technical scope of this invention is not.

  FIG. 1 is a system block diagram showing a schematic configuration of a private power generation device 10 according to an embodiment of the present invention.

  As shown in FIG. 1, the private power generation apparatus 10 operates a generator 12 with an engine 11 to supply power, and is here a package-type private power generation apparatus. This private power generation device 10 includes an engine 11, a generator 12 driven by the engine 11, a circuit breaker 52G, an auxiliary device 21, and a control unit 16 that controls the private power generation device 10 as a whole. . The control unit 16 is composed of a plurality of control panels. Here, the control panels are connected to each other according to the CAN (Controller Area Network) standard, and data is transferred between them.

  Specifically, the engine 11 is connected to the generator 12 and transmits the rotational output to the generator 12. The generator 12 supplies the generated power by the rotational output of the engine 11. The circuit breaker 52 </ b> G supplies or blocks the generated power from the generator 12, and is provided on the high voltage board 13. The circuit breaker 52G is connected to the output system of the control unit 16 and supplies the generated power from the generator 12 in the closed state by the operation signal from the control unit 16, while in the cut-off state. The supply of generated power from the generator 12 is cut off.

  The auxiliary machine 21 is a plurality of auxiliary machines (here, engine cooling water pump 21a, lubricating oil priming pump 21b, and engine ambient air ventilation fan 21c). The auxiliary machine 21 is connected to the output system of the control unit 16 and cools the engine 11 by an operation signal from the control unit 16.

  The engine cooling water pump 21a circulates cooling water between the engine 11 and a radiator (not shown) that performs heat exchange with the cooling water. The lubricating oil priming pump 21b circulates lubricating oil inside the engine. The engine ambient air ventilation fan 21c performs heat exchange of air around the engine 11, and is a package ventilation fan provided in a package (not shown) of the private power generation apparatus 10 here. The auxiliary machine 21 may directly cool the engine 11 as described above, or may cool peripheral equipment heated by the engine 11.

  The control unit 16 includes a processing device (not shown) such as a CPU (Central Processing Unit) and a storage unit (not shown) such as a ROM (Read Only Memory) and a RAM (Random Access Memory). The storage unit stores various control programs and necessary functions and tables. And the control part 16 is comprised so that the said electric power generation control program may be read from the said memory | storage part by the said CPU, and this read electric power generation control program is performed.

  FIG. 2 is a diagram showing a temporal change in the rotational speed of the engine 11 in the private power generation apparatus 10 and a timing chart of the auxiliary machine 21 controlled by the control unit 16.

  The control unit 16 is configured to operate the auxiliary machine 21 when there is a start command for the engine 11 (see “engine start command” in the figure).

  Specifically, the control unit 16 operates the lubricant priming pump 21b and the engine ambient air ventilation fan 21c simultaneously with the start command of the engine 11. Although not shown, the control unit 16 operates the lubricating oil priming pump 21b at predetermined intervals (for example, every 5 hours for 5 minutes) when the engine 11 is in a standby state. Lubricating oil is circulated inside the engine 11.

  Further, the control unit 16 starts the engine 11 by starting the cell motor after a predetermined first control time α (for example, 30 seconds) has elapsed from the start command of the engine 11 (see “cell motor start” in the figure). The engine coolant pump 21a is also activated.

  Further, when the engine 11 exceeds a predetermined low rotation speed (for example, 300 rotations / minute), the control unit 16 stops the operation of the lubricating oil priming pump 21b, and the engine 11 has a predetermined rated rotation speed (for example, 1500 rotations / minute). Minutes) and the specified voltage is maintained (refer to “establishment of specified voltage” in the figure), and the circuit breaker 52G is closed after a predetermined second control time β (for example, 180 seconds) has elapsed since that time (see “ (Refer to “Breaking the breaker”)

  Then, the control unit 16 performs a cooling-down operation (also referred to as after-cooling) when there is a command to stop the engine 11 (see “engine stop command” in the drawing) and a condition that allows a cooling-down operation to be omitted is satisfied. Configured to do. That is, the control unit 16 is configured to operate the auxiliary machine 21 for a predetermined fixed operation time after the stop command for the engine 11 when the condition that the cooling down operation can be omitted is not satisfied. The time for performing the cooling down operation can be set for each of the auxiliary machines 21. The cooling-down operation may be performed simultaneously with the engine 11 stop command, or may be performed after the engine 11 stop command, when the engine 11 becomes a predetermined low rotational speed or less. It may be performed after a predetermined time has elapsed from the stop command.

  Specifically, when the condition for enabling the cooling-down operation to be omitted is not satisfied, the control unit 16 causes the lubricating oil priming pump 21b to turn the engine 11 below a predetermined low rotational speed after a command to stop the engine 11. In some cases, the engine is operated only for a predetermined second operation time b (for example, 10 minutes), and the engine cooling water pump 21a and the engine ambient air ventilation fan 21c are respectively set to a predetermined first operation time simultaneously with the stop command for the engine 11. Driving is performed for a (for example, 10 minutes) and a predetermined third operation time c (for example, 30 minutes). Note that the engine coolant pump 21a and the engine ambient air ventilation fan 21c continue to operate from the start, and are also operating at the time of the stop command of the engine 11.

  Further, the control unit 16 outputs a stop command for the engine 11 after a predetermined third control time γ (for example, 60 seconds) elapses after the circuit breaker 52G is disconnected (see “circuit breaker / off” in the drawing). It is configured.

(Description of features of the present invention)
As shown in FIG. 1, the private power generator 10 further includes a lubricant temperature detector 14. The lubricating oil temperature detection device 14 is configured to detect the lubricating oil temperature of the engine 11. The lubricating oil temperature detection device 14 is connected to the input system of the control unit 16 and transmits the detected value of the lubricating oil temperature of the engine 11 to the control unit 16.

  The control unit 16 samples the temperature data of the lubricating oil temperature of the engine 11 detected by the lubricating oil temperature detection device 14, and among the sampled temperature data, a predetermined constant temperature monitoring time (for example, 30 minutes) is detected. The temperature data within the above time) is sequentially stored in the storage unit.

  Then, the control unit 16 keeps the predetermined temperature continuously for the temperature monitoring time (for example, 30 minutes or more) from the time when the engine 11 is instructed to stop the lubricating oil temperature measured by the lubricating oil temperature detection device 14. The cooling down operation is omitted when the temperature is equal to or lower than a predetermined specified temperature (for example, 70 ° C.). The temperature monitoring time and the specified temperature can be stored in advance in the storage unit. The temperature monitoring time and the specified temperature may be changeable according to engine characteristics.

  FIG. 3 is a flowchart illustrating an example of power generation control by the control unit 16 of the private power generation device 10.

  When performing the power generation control shown in FIG. 3, the temperature monitoring time and the specified temperature stored in advance in the storage unit are read out.

  In the power generation control shown in FIG. 3, first, when a start command for the engine 11 is issued (step S1), the lubricating oil priming pump 21b and the engine ambient air ventilation fan 21c are operated simultaneously with the start command for the engine 11 to start the engine 11. After the first control time α elapses from the command, the cell motor is started to start the engine 11 and the engine coolant pump 21a is operated (step S2). At this time, the temperature data of the lubricating oil temperature of the engine 11 detected by the lubricating oil temperature detection device 14 is sampled, and the temperature data within the temperature monitoring time is sequentially stored in the storage unit (step S3).

  Next, when the engine 11 exceeds the low rotational speed, the operation of the lubricating oil priming pump 21b is stopped, and when the engine 11 reaches the rated rotational speed and maintains the specified voltage, the second control is started from that point. After the time β has elapsed, the circuit breaker 52G is closed (step S4), and then the processes of steps S3 and S4 are repeated until the circuit breaker 52G is disconnected (step S5: No).

  When the circuit breaker 52G is shut off (step S5: Yes), the process waits until the third control time γ elapses (step S6: No), and when the third control time γ elapses (step S6: Yes), the engine 11 A stop command is issued (step S7). The circuit breaker 52G is interrupted as necessary during normal operation, and also shuts off when trouble such as generation of overcurrent on the generator 12 side or ignition failure on the engine 11 side occurs. Is done. Further, a stop command for the engine 11 may be issued before the circuit breaker 52G is closed due to the above trouble or the like.

  Next, it is determined whether or not the temperature data is below the specified temperature within the temperature monitoring time (step S8). If all the temperature data is below the specified temperature (step S8: Yes) ), Without proceeding to the cooling down operation, the process proceeds to step S10. On the other hand, if there is a temperature data higher than the specified temperature (step S8: No), after performing the cooling down operation (see after cooling a, b, c in FIG. 2) (step S9), step The process proceeds to S10.

  In step S10, it waits until there is a next start command (step S10: No, step S11: No), and when there is a next start command (step S10: Yes), the process proceeds to step S1 while the power generation control ends. When there is a processing instruction (step S11: Yes), the power generation control processing is terminated.

  Note that the third control time γ from when the circuit breaker 52G is shut off until the stop command for the engine 11 may be set to 0 seconds. That is, the control unit 16 may be configured to output a stop command for the engine 11 when the circuit breaker 52G is shut off. In this case, by removing the process of step S6 in the flowchart of FIG. 3, when the circuit breaker 52G is shut off in step S5 (step S5: Yes), a stop command for the engine 11 may be issued in step S7. it can.

  According to the private power generation apparatus 10 described above, for example, troubles such as generation of overcurrent on the generator 12 side or ignition failure on the engine 11 side before the engine 11 starts up. Thus, even if the engine 11 stop command is issued by interrupting the circuit breaker 52G (or before closing the circuit breaker 52G), the lubricating oil temperature of the engine 11 immediately before the engine 11 is stopped. When the temperature monitoring time continues and is below the specified temperature, the cooling down operation is omitted. That is, when it can be considered that the temperature of the engine 11 is a temperature that does not require the cooling-down operation, the cooling-down operation is omitted. As a result, it is possible to omit the useless cooling down operation and immediately prepare for the next start command.

It is a system block diagram which shows schematic structure of the private power generation device which concerns on embodiment of this invention. It is a figure which shows the timing chart of the auxiliary machine controlled by the time change of the rotational speed of the engine in the private power generation device which concerns on embodiment of this invention, and a control part. It is a flowchart which shows an example of the electric power generation control by the control part of the private power generation device which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Private generator 11 Engine 12 Generator 21 Auxiliary machine 21a Engine cooling water pump 21b Lubricating oil priming pump 21c Engine surrounding air ventilation fan

Claims (1)

An in-house power generator that operates a generator with an engine to supply electric power, and performs auxiliary operations such as an engine cooling water pump, a lubricating oil priming pump, an engine ambient air ventilation fan, etc. after the engine stop command. In private power generators that perform cooling down operation that operates for hours,
The private power generation apparatus, wherein the cooling down operation is omitted if the lubricating oil temperature of the engine continues for a predetermined temperature monitoring time and is equal to or lower than the predetermined temperature immediately before the engine is stopped.

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