JP5250733B2 - Portable power generator - Google Patents

Description

  The present invention relates to a portable power generator used outdoors or the like.

  Portable power generators equipped with a generator driven by an engine (internal combustion engine) have been widely used in the past when lighting or equipment power is required at construction sites, outdoor camps, stalls, etc. (For example, see Patent Document 1 and Patent Document 2 below). The portable power generator generally used is often used at night, and the engine is driven to operate the generator. Therefore, consideration for noise is indispensable. For this reason, in the conventionally proposed portable power generator, various considerations such as the use of a sound insulation case have been made.

  However, because it is portable, it is not possible to use a large sound insulation case or the like, and generally, since a diesel engine with a low fuel cost is used, noise cannot be sufficiently suppressed. It was. In addition, since it is a device that drives an engine that is an internal combustion engine, consideration must be given to exhaust gas even though a portable and small engine is used.

As described above, although the portable power generation device has problems that need to be solved with respect to noise and exhaust gas, it is not a device that can be installed and used for a long time, so that sufficient measures have not been taken. It was the current situation.
JP 2004-60567 A JP 2004-60570 A

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a portable power generator that can generate power without using an internal combustion engine and that does not cause problems with noise and exhaust gas.

In order to achieve the above object, a portable power generator of the present invention according to claim 1 expands the medium by a temperature raising means for raising the temperature of the medium by an external heat source, and an expansion chamber formed by a fixed scroll and a turning scroll. Expansion means for rotating, a revolving shaft provided on the orbiting scroll, and a rotating shaft that eccentrically supports the revolving shaft, and the medium is expanded in the expansion chamber, whereby the orbiting shaft is interposed via the orbiting scroll. A generator that receives a turning force and rotates the rotating shaft by the turning force of the turning shaft to obtain electric power, and a medium that circulates the medium expanded by the expansion means and finished the work to the temperature raising means comprising a circulation system, and a cooling means for cooling the medium of the medium circulating system, the external heat source, the heat of combustion of the fuel is intended to be a heat source, the heating means, heating by the external heat source Means for heating the body, recovering the heat of the temperature raising medium to raise the temperature of the medium, the temperature raising medium is water, and the cooling means recovers the heat of the medium to warm water It is a hot water supply means for obtaining

In the present invention according to claim 1, power is generated using the turning force of the orbiting scroll accompanying the expansion of the medium as the driving force of the rotating shaft via the turning shaft provided eccentric to the rotation shaft of the power generation means. Even in the case of a medium of about 100 ° C. to 200 ° C., expansion power can be easily obtained, and power generation drive can be performed by a medium heated by an external heat source.
And since a medium can be heated up using fuels, such as portable gas, as a heat source, an external heat source does not become large.
Further, it becomes possible to raise the temperature of the medium by interposing a temperature raising medium, and the temperature of the medium can be efficiently raised by arbitrarily setting the conditions of the external heat source and the temperature raising medium.
Further, the temperature of the medium can be increased by warming water.
Moreover, warm water can be obtained by cooling the medium, and it is possible to have a function of hot water supply in addition to power generation.

  For this reason, it is possible to obtain a portable power generation device in which power is generated by the power generation means without using the internal combustion engine and no problem with noise or exhaust gas occurs.

In addition , oil can be applied as the heating medium, and boiling of the heating medium can be suppressed and rusting of the piping can be prevented.

  The portable power generator of the present invention is a portable power generator that can generate power without using an internal combustion engine, and does not cause problems with noise and exhaust gas.

  FIG. 1 shows a schematic system of a portable power generation apparatus according to a first embodiment of the present invention, and FIG. 2 shows a cross section of a specific structure of power generation means in FIG.

  As shown in FIG. 1, a reheating device 1 (means for heating the heating medium) as an external heat source for heating the heating medium (water) by combustion of fuel (for example, city gas, propane gas, white kerosene, etc.) And a heat storage tank 3 in which a heating medium (heated hot water) heated by the reheating device 1 circulates through a circulation pipe 2. The heating medium (heated hot water) heated by the reheating device 1 is circulated between the reheating device 1 and the heat storage tank 3 through the circulation pipe 2 by driving the circulation pump 4.

  On the other hand, a heat exchange tank 5 is provided as a cooling means for storing city water (for example, 15 ° C. or less), and a medium circulation path 6 is provided between the heat storage tank 3 and the heat exchange tank 5. The medium circulation path 6 is filled with, for example, a chlorofluorocarbon gas medium, and the medium heat recovered in the heat exchange tank 5 is pumped to the heat storage tank 3 side by the booster pump 7. A heating medium (heated water: for example, 85 ° C. to 150 ° C.) heated by the recirculation device 2 by the circulation pipe 2 is sent to the heat storage tank 3, and sent by the medium circulation path 6 in the heat storage tank 3. The medium is heated to, for example, 85 ° C. to 150 ° C. (temperature raising means).

  For example, a medium heated to 85 ° C. to 150 ° C. is sent to the power generation means 8 by the medium circulation path 6, and a medium (for example, 50 ° C.) that has finished work in the power generation means 8 is a heat exchange tank by the medium circulation path 6. 5, the city water in the heat exchange tank 5 is warmed, for example, to supply hot water of 40 ° C to 60 ° C. The power generation means 8 includes, for example, expansion means 9 (for example, a circulating flow type small scroll expander) that expands a medium at 85 ° C. to 150 ° C., and the rotation shaft of the expansion means 9 is connected to the rotor of the generator 10. Has been.

  That is, the power generation means 8 includes the expansion means 9 and the generator 10. For example, a medium of 85 ° C. to 150 ° C. is expanded by the expansion means 9 to obtain rotational power, and the rotational power of the expansion means 9 is converted to the generator 10. To generate power and collect power (eg, 400 W). The medium that has finished the work in the expansion means 9 is, for example, exhausted at 50 ° C. and sent to the heat exchange tank 5 through the medium circulation path 6 to be a heat source of hot water (hot water supply means).

  In addition, although the example which applied water as a temperature rising medium was given and demonstrated, oil can also be applied as a temperature rising medium. By applying oil, the heating medium does not boil even when the temperature is higher than 100 ° C., and the heating medium can be operated stably. Moreover, it is not necessary to consider the countermeasure against the rust of the circulation pipe 2. Furthermore, edible oil can be applied as the oil. By using edible oil as the temperature raising medium oil, the environment is not affected when waste oil is treated.

  The power generation means 8 will be described in detail based on FIG.

  As shown in FIG. 2, a fixed scroll 22 is fixed to an upper portion of a cylindrical casing 21, and a spiral wrap is formed on the fixed scroll 22. A stator 23 is fixed inside the cylindrical portion of the casing 21, and a rotating shaft 24 is rotatably supported via a bearing 25 on the inner peripheral side of the stator 23. A rotor 26 corresponding to the stator 23 is fixed to the rotating shaft 24, and the generator 10 is configured by the stator 23, the rotor 26, and the like. A rotating shaft 27 is rotatably supported on the rotating shaft 24 via a bearing 28, and the axis of the rotating shaft 24 and the axis of the rotating shaft 27 are in an eccentric state. That is, the turning shaft 27 is eccentrically supported by the rotating shaft 24 and is rotatably supported.

  The orbiting shaft 27 has an upper end protruding from the rotating shaft 24 and the casing 21, and an orbiting scroll 31 is attached to the upper end of the orbiting shaft 27. The orbiting scroll 31 is provided with the same wrap as the fixed scroll 22, and the wrap of the orbiting scroll 31 and the wrap of the fixed scroll 22 are arranged to overlap each other. A plurality of expansion chambers 32 are formed by overlapping the wrap of the orbiting scroll 31 and the wrap of the fixed scroll 22, and the medium circulation path 6 communicating with the expansion chamber 32 is connected to the fixed scroll 22. FIG. 2 shows the expansion chamber 32 in a state where the medium is expanded.

  On the other hand, the lower end of the turning shaft 27 is disposed so as to protrude from the rotating shaft 24, and the lower end of the turning shaft 27 is supported by the rotation prevention mechanism 34. The rotation prevention mechanism 34 is provided with a turning member capable of turning with respect to a base member fixed on the casing 21 side, and the turning member is attached to the turning shaft 27. The shaft 27 is allowed to turn and prevents rotation with respect to the rotating shaft 24.

  In the power generation means 8 including the expansion means 9 and the generator 10, the heated medium (for example, 85 ° C. to 150 ° C.) is sent from the medium circulation path 6 to the expansion chamber 32 and is expanded in the expansion chamber 32. Thus, the turning shaft 27 turns. Since the turning shaft 27 cannot rotate with respect to the rotating shaft 24, the rotating shaft 24 is rotated by turning the turning shaft 27. The generator 10 is operated by the rotation of the rotating shaft 24 to obtain electric power, and the medium (for example, 50 ° C.) sequentially expanded in the expansion chamber 32 is sent to the heat exchange tank 5 (see FIG. 1) through the medium circulation path 6. It is done.

  The power generation means 8 provided with the expansion means 9 has a structure in which the expansion power of the medium is transmitted to the turning shaft 27 of the orbiting scroll 31 and the rotating shaft 24 of the generator 10 is rotated by the turning of the turning shaft 27. The resistance at the time of starting the rotating shaft 24 is greatly reduced, the rotating shaft 24 can be smoothly rotated from a low torque state, and the relationship between torque and rotational speed can be kept linear. For this reason, even a medium-high temperature medium of about 120 ° C. can sufficiently obtain expansion power to drive the rotating shaft 24 of the generator 10, and the temperature is raised by the heat medium heated by the reheating device 1. Even with a medium having a temperature of about 120 ° C., for example, power of about 400 W can be obtained by expansion power.

  The operation of the above-described portable power generator will be described. The illustrated portable power generator is not installed at a place of use and used for a long time, but is transported to the place of use and generates power only when necessary.

  The temperature raising medium is heated by the reheating device 1 (for example, 85 ° C. to 150 ° C.), and is sent from the circulation pipe 2 to the heat storage tank 3 by driving the circulation pump 4. The heating medium recovered in the heat storage tank 3 is returned to the reheating device 1 by the circulation pump 4 and heated.

  In the heat storage tank 3, the medium is heated (for example, 85 ° C. to 150 ° C.) by the heat of the temperature rising medium (heating hot water), and the heated medium is expanded from the medium circulation path 6 to the expansion chamber of the expansion means 9 of the power generation means 8. 32 to be expanded. When the medium is expanded in the expansion chamber 32, the turning shaft 27 turns to rotate the rotating shaft 24, and the generator 10 operates to obtain electric power.

  Then, the medium (for example, 50 ° C.) that is sequentially expanded in the expansion chamber 32 is sent to the heat exchange tank 5 through the medium circulation path 6 to recover the heat, and is boosted by the booster pump 7 and is heated in the medium circulation path 6. The temperature is raised again. In the heat exchange tank 5, the city water is heated by a medium (for example, 50 ° C.) that is sequentially expanded in the expansion chamber 32 to be hot water for hot water supply.

  For this reason, power generation is performed using the turning force of the turning scroll 31 accompanying the expansion of the medium as the driving force of the rotating shaft 24 via the turning shaft 27 provided eccentric to the rotating shaft 24. Even with a medium of about 150 ° C., expansion power can be easily obtained, and power generation drive is possible with a medium heated by an external heat source. Thereby, it is possible to obtain a portable power generation apparatus in which power generation power is obtained by the power generation means 8 without using an internal combustion engine and no problem with noise and exhaust gas occurs.

  In addition, since the heat of the medium is recovered by the heat exchange tank 5 (cooling the medium) to obtain hot water, hot water can be obtained by cooling the medium. It becomes possible to have a function. As a result, it is possible to generate electric power and supply hot water, which can also be used for heating and the like.

  A second embodiment of the present invention will be described.

  FIG. 3 shows a schematic system of a portable power generator according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same structural member as the structural member of the portable power generation device of 1st Embodiment shown in FIG. 1, FIG. 2, and the overlapping description is abbreviate | omitted.

  The portable power generator according to the second embodiment shown in FIG. 3 includes a second circulation pipe 12 that circulates a heating medium (heated hot water) heated by the reheating device 1 to the heat exchange tank 5. . Other configurations are the same as those of the first embodiment.

  In the portable power generation device of the second embodiment, the heating medium heated by the reheating device 1 can be used effectively. If the temperature raising medium is heated hot water, it can be directly mixed with hot water of hot water supply.

  A third embodiment and a fourth embodiment of the present invention will be described.

  FIG. 4 shows a schematic system of a portable power generator according to the third embodiment of the present invention, and FIG. 5 shows a schematic system of a portable power generator according to the fourth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same structural member as the structural member of the portable power generation device of 1st Embodiment shown in FIG. 1, FIG. 2, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 4, a stove 14 that obtains a heat source by combustion of fuel (for example, portable fuel) is provided, and the oil in the oil bath 15 is heated by the stove 14. A medium circulation path 6 is provided between the oil bath 15 and the heat exchange tank 5. In the oil bath 15, the medium sent through the medium circulation path 6 is heated to, for example, 85 ° C. to 150 ° C. Other configurations are the same as those of the first embodiment.

  As shown in FIG. 5, a stove 14 that obtains a heat source by combustion of fuel (for example, portable fuel) is provided, and a heating unit 17 that is heated by the stove 14 is formed in the medium circulation path 6. In the heating unit 17, the medium sent through the medium circulation path 6 is heated to 85 ° C. to 150 ° C., for example. Other configurations are the same as those of the first embodiment.

  In the portable power generators of the third embodiment and the fourth embodiment, power can be easily generated using a simple stove 14.

  In the portable power generation device of the first embodiment to the fourth embodiment, the heat exchange tank 5 is used to explain the example of supplying city water as hot water, but the city water is stored in the cooling tank as hot water. It is also possible to supply water. It is also possible to supply constant temperature water from a constant temperature circulator or the like to the heat exchange tank 5 or the cooling tank instead of city water. Furthermore, it is also possible to have a configuration in which the medium is cooled by running water without supplying hot water. As running water in this case, city water, drainage of various facilities, rainwater, etc. can be used. Furthermore, it is also possible to apply a configuration in which a medium is heated by using heat of environmental energy (solar heat or heat absorption from the atmosphere) in addition to an external heat source.

The portable power generator of the above-described embodiment is a portable power generator that can generate power without using an internal combustion engine, and does not cause problems with noise and exhaust gas. For this reason, it becomes possible to greatly reduce restrictions such as a place of use and a use time zone, power generation can be performed easily, and securing of a power source becomes extremely easy. In addition, since only the exhaust gas from the regenerator 1 and the stove 14 is generated without using the internal combustion engine, the spread of portable power generation devices reduces the total CO ₂ emission, which is advantageous for CO ₂ reduction. It becomes a device.

  The present invention can be used in the industrial field of portable power generators used outdoors and the like.

1 is a schematic system diagram of a portable power generator according to a first embodiment of the present invention. It is a detailed sectional view of the power generation means in FIG. It is a schematic system diagram of the portable power generator according to the second embodiment of the present invention. It is a general | schematic systematic diagram of the portable electric power generating apparatus which concerns on the example of 3rd Embodiment of this invention. It is a general | schematic systematic diagram of the portable electric power generating apparatus which concerns on the example of 4th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reheating device 2 Circulation piping 3 Heat storage tank 4 Circulation pump 5 Heat exchange tank 6 Medium circulation path 7 Booster pump 8 Power generation means 9 Expansion means 10 Generator 12 2nd circulation piping 14 Stove 15 Oil bath 17 Heating part 21 Casing 22 Fixation Scroll 23 Stator 24 Rotating shaft 25, 28 Bearing 26 Rotor 27 Rotating shaft 31 Rotating scroll 32 Expansion chamber 34 Rotation prevention mechanism

Claims (1)

A temperature raising means for raising the temperature of the medium by an external heat source;
Expansion means for expanding the medium in an expansion chamber formed by a fixed scroll and a turning scroll;
A revolving shaft provided on the orbiting scroll and a rotating shaft that eccentrically supports the orbiting shaft, and the medium is expanded in the expansion chamber, whereby the orbiting force is transmitted to the orbiting shaft via the orbiting scroll. A generator that obtains electric power by rotating the rotating shaft by the turning force of the turning shaft;
A medium circulation system for circulating the medium, which has been expanded by the expansion means and finished work, to the temperature raising means;
Cooling means for cooling the medium of the medium circulation system ,
The external heat source uses fuel combustion heat as a heat source,
The temperature raising means includes means for heating the temperature raising medium by the external heat source, and is means for recovering the heat of the temperature raising medium and raising the temperature of the medium.
The heating medium is water;
The portable power generator characterized in that the cooling means is a hot water supply means for recovering heat of the medium to obtain hot water .

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