JP7220089B2 - portable generator - Google Patents

Description

TECHNICAL FIELD The present invention relates to a transportable portable power generator that generates power using combustion heat.

Patent Literature 1 discloses a simple power generation device that includes a thermoelectric generator that utilizes the Peltier effect. The simple power generator described in Patent Document 1 is configured to eject liquefied gas fuel supplied from a fuel tank through a fuel pipe toward a combustion chamber from a nozzle installed near an air mixing unit. . A heating surface of the thermoelectric generator utilizing the Peltier effect is joined to a heat diffusion plate and faces a heating base made of a flat plate through the heat diffusion plate.

A simple or portable power generation device such as that described in Patent Document 1 can be used to charge electric products such as smartphones and tablet terminals outdoors or in disaster areas where commercial power is not supplied. , LED (Light Emitting Diode) illuminators, and other electrical products, the ability to generate an electromotive force is desired. In addition, sufficient electromotive force generation capability is desired so that electric appliances can be charged and used at the same time. In other words, improvements in power generation capacity and power generation efficiency are desired for simple or portable power generators.

However, in the simple power generator described in Patent Document 1, the heating surface of the thermoelectric generator utilizing the Peltier effect is perpendicular to the mounting surface of the simple power generator. Further, the nozzle extends in a direction orthogonal to the installation surface of the simple power generation device, and ejects the liquefied gas fuel in a direction orthogonal to the installation surface of the simple power generation device. Therefore, the jetting direction of the liquefied gas fuel jetted from the nozzle is substantially parallel to the heating surface of the thermoelectric element. That is, the emission direction of the flame emitted from the nozzle is substantially parallel to the heating surface of the thermoelectric generator. Therefore, there is room for improvement in terms of efficiently transferring the heat of the flame and exhaust gas emitted from the burner to the heating surface of the thermoelectric element to improve the power generation amount and power generation efficiency.

JP-A-9-285160

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a portable power generator capable of improving the power generation amount and power generation efficiency.

According to the present invention, there is provided a portable power generation apparatus that generates electricity using combustion heat and is transportable, wherein the fuel gas is supplied from a fuel gas storage container in which the fuel gas is stored. a burner that burns; a high temperature section that is heated by flames emitted from the burner and heat transmitted from the exhaust gas; a low temperature section that is disposed facing the high temperature section and maintained at a temperature lower than that of the high temperature section; a thermoelectric element sandwiched between the high-temperature part and the low-temperature part and generating power based on the temperature difference between the high-temperature part and the low-temperature part, wherein the heat transferred from the flame and the exhaust gas is removed. The problem is solved by the portable power generator, wherein the surface of the high-temperature portion that receives the heat is inclined with respect to a direction perpendicular to the installation surface of the portable power generator.

According to the portable power generator according to the present invention, since the surface of the high-temperature part (surface that receives heat) is inclined with respect to the direction orthogonal to the installation surface of the portable power generator, the flame emitted from the burner Heat is transmitted along the surface of the high-temperature part that is inclined with respect to the direction orthogonal to the installation surface. Therefore, the heat of the flame can be suppressed from being transmitted to a local portion of the high-temperature portion, and the entire surface of the high-temperature portion can be uniformly heated by the heat of the flame. Further, the exhaust gas emitted from the burner flows along the surface of the high-temperature part that is inclined with respect to the direction perpendicular to the installation surface. Therefore, it is possible to prevent the exhaust gas emitted from the burner from being trapped in a local portion of the high temperature section. Therefore, the heat of the exhaust gas can be suppressed from being transmitted to a local portion of the high temperature portion, and the entire surface of the high temperature portion can be uniformly heated by the heat of the exhaust gas. As a result, the surface of the high temperature section is efficiently heated by the flame and exhaust gas emitted from the burner. Also, since it is possible to suppress local heating of a predetermined portion of the high temperature section, it is possible to suppress the heat of the flame and the exhaust gas from being transferred to the low temperature section via the high temperature section. Therefore, it is possible to efficiently generate a temperature difference between the high temperature section and the low temperature section. As a result, the power generation amount and power generation efficiency of the portable power generator according to the present invention can be improved.

The portable power generation device according to the present invention is preferably provided on the burner side when viewed from the high temperature section, and is a guide that forms a flow path that guides the exhaust gas upward along the surface of the high temperature section to the upper side of the slope. It is characterized by further comprising a part.

According to the portable power generator according to the present invention, the exhaust gas emitted from the burner is guided upward in the sloping flow path formed by the guide section, and the high temperature gas slanted with respect to the direction orthogonal to the installation surface is generated. flows more reliably along the surface of the part. Therefore, it is possible to further suppress the heat of the exhaust gas from being transferred to a local portion of the high-temperature portion, and to uniformly heat the entire surface of the high-temperature portion by the heat of the exhaust gas. In addition, since the exhaust gas having a temperature higher than the temperature of the gas existing outside the flow path of the guide flows through the inside of the flow path of the guide, the guide serves as a chimney and a chimney effect occurs. Therefore, the exhaust gas emitted from the burner can be further prevented from being clogged locally in the high temperature section, and the entire surface of the high temperature section can be uniformly heated by the heat of the exhaust gas. As a result, the power generation amount and power generation efficiency of the portable power generator according to the present invention can be further improved.

The portable power generator according to the present invention is preferably disposed facing the low temperature section and is driven by being supplied with the electromotive force generated by the thermoelectric element to send air to the low temperature section and cool the low temperature section. a blower, the air containing the exhaust gas that has flowed along the surface of the high temperature section, and the air containing the cooling air sent from the blower that has flowed along the surface of the low temperature section, and the mixing and an exhaust mixing section forming a flow path for guiding the discharged air to the outside.

According to the portable power generator according to the present invention, the blower is driven by being supplied with the electromotive force generated by the thermoelectric element, and sends air to the low temperature section. That is, the blower is driven by being supplied with the electromotive force generated by the thermoelectric element to generate forced convection on the surface of the low temperature part. Thereby, the blower forcibly cools the low temperature section. Therefore, it is possible to efficiently generate a temperature difference between the high temperature section and the low temperature section. As a result, the power generation amount and power generation efficiency of the portable power generator according to the present invention can be further improved. Further, the exhaust mixing section mixes the air containing the exhaust gas flowing along the surface of the high temperature section and the air containing the cooling air sent from the blower and flowing along the surface of the low temperature section, and the mixed air is Form a channel leading to the outside. As a result, the blower can forcibly discharge the exhaust gas discharged from the burner and guided to the flow path of the exhaust mixing unit to the outside of the portable power generator. In addition, since the air containing the exhaust gas is mixed with the air containing the cooling air sent from the blower in the passage of the exhaust mixing section, the temperature of the air discharged to the outside of the portable power generator can be suppressed.

ADVANTAGE OF THE INVENTION According to this invention, the portable electric power generating apparatus which can improve the electric power generation amount and electric power generation efficiency can be provided.

It is a sectional view showing the internal structure of the portable power generator concerning the embodiment of the present invention. It is a top view showing a portable electric power generating apparatus when it sees from the direction of arrow A21 shown in FIG. It is a top view showing the portable power generator concerning the modification of this embodiment. 4 is a table showing an example of the results of studies conducted by the inventors of the present invention; FIG. 5 is a graph showing an example of the relationship between the tilt angle of the first sample shown in FIG. 4 and the maximum power generation amount; FIG. FIG. 5 is a graph showing an example of the relationship between the tilt angle of the second sample shown in FIG. 4 and the maximum power generation amount; FIG.

Preferred embodiments of the invention are described in detail below with reference to the drawings.
Since the embodiments described below are preferred specific examples of the present invention, various technically preferable limitations are applied. Unless otherwise stated, the invention is not limited to these modes. Further, in each drawing, the same constituent elements are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

FIG. 1 is a cross-sectional view showing the internal structure of a portable power generator according to an embodiment of the present invention.
FIG. 2 is a plan view showing the portable power generator when viewed from the direction of arrow A21 shown in FIG.
2, the housing 21 and the exhaust mixing section 7 are omitted for convenience of explanation.

The portable power generation device 2 according to the present embodiment is a power generation device that burns fuel gas and uses the combustion heat at that time to generate an electromotive force. It is a portable power generator that can be used in.

As shown in FIG. 1 , the portable power generator 2 according to this embodiment includes a housing 21 , a burner 4 , a high temperature section 51 , a low temperature section 52 and a thermoelectric element 53 . Moreover, the portable power generator 2 may further include a guide section 6 , a blower 54 , an exhaust mixing section 7 , and a baffle plate 8 .

The housing 21 is, for example, a metallic casing coated with heat-resistant paint, and has a size that allows portability. The housing 21 may have a handle (not shown) that can be gripped by the user. In this case, the user can easily carry the portable power generator 2 by gripping the handle. A plurality of legs 22 are provided on the bottom surface of the housing 21 . Thereby, the user can stably place the portable power generator 2 on the installation surface 9 .

In the portable power generator 2 according to the present embodiment, the burner 4, the high temperature section 51, the low temperature section 52, the thermoelectric element 53, the guide section 6, the blower 54, the exhaust mixing section 7, and the baffle plate 8 , are provided inside the housing 21 . Further, the user can open a door (not shown) provided in the housing 21 to attach the fuel gas storage container 31 containing the fuel gas to the inside of the housing 21 through the outlet 23, or It can be removed from the inside of the housing 21 .

The fuel gas container 31 is, for example, a cartridge-type gas cylinder containing compressed liquefied gas, and contains fuel gas. The fuel gas discharged from the fuel gas storage container 31 enters a governor provided inside the container connecting portion 32 and is pressure-regulated. When the fuel gas container 31 is a cartridge type gas cylinder, the attachment/detachment mechanism between the fuel gas container 31 and the container connecting portion 32 is of a magnet type. According to this, when the gas cylinder is heated and the internal pressure of the gas cylinder rises abnormally, the safety mechanism is activated and the connection between the fuel gas container 31 and the container connecting portion 32 is disconnected.

The container connecting portion 32 is connected to the operation knob portion 33 and can adjust the amount of fuel gas supplied from the fuel gas container 31 . The fuel gas supplied from the fuel gas storage container 31 through the container connecting portion 32 passes through the gas pipe 34, a gas/air mixer (not shown), etc., and is supplied to the burner 4 while being mixed with air. be.

The burner 4 is installed on the bottom surface of the housing 21 inside the housing 21 . An electrode (not shown) is provided near the burner 4 . When the user rotates the operation knob 33, an igniter (not shown) is pushed to generate a pulse voltage. An electrode provided near the burner 4 is discharged by a pulse voltage generated by the rotation of the operation knob 33, burns the fuel gas supplied to the burner 4 from the fuel gas storage container 31, and ignites the burner 4. be able to.

In the portable power generator 2 according to the present embodiment, the shaft 42 of the burner 4 extends in the direction A1 perpendicular to the installation surface 9 . Therefore, the flame 41 emitted from the burner 4 extends in the direction A1 orthogonal to the installation surface 9. As shown in FIG. Further, as shown in FIG. 2, the burner 4 has a plurality of flame ports 43 arranged side by side in the X direction. The X direction shown in FIG. 2 corresponds to the width direction of the high temperature portion 51 and the low temperature portion 52 . Therefore, as shown in FIG. 2 , the burner 4 can heat substantially the entire width direction of the high temperature portion 51 substantially uniformly with the heat of the flame 41 . The installation position of the burner 4 inside the housing 21, the installation direction of the burner 4 (orientation of the shaft 42 of the burner 4), and the shape of the burner 4 are necessarily limited to the examples shown in FIGS. Do not mean.

The high temperature section 51 is installed above the burner 4 and is heated by the flame 41 emitted from the burner 4 and the heat transferred from the exhaust gas. The high temperature portion 51 is made of a well-known metal such as aluminum, and receives heat transferred from the flame 41 and the exhaust gas on its surface 511 . That is, the surface 511 of the high temperature portion 51 functions as a heat receiving surface. As shown in FIG. 2, the hot section 51 is, for example, a finned heat sink having a plurality of fins 512 . According to this, the high temperature section 51 can efficiently receive the heat transferred from the flame 41 and the exhaust gas at the surface 511 and the fins 512 and transfer the heat to the thermoelectric element 53 . Note that the high temperature section 51 is not necessarily limited to a heat sink with fins. In the following description, the case where the high temperature section 51 is a finned heat sink having a plurality of fins 512 will be taken as an example.

As shown in FIG. 1, the surface 511 of the high-temperature portion 51 that receives the heat transmitted from the flame 41 emitted from the burner 4 and the exhaust gas is inclined with respect to the direction A1 orthogonal to the installation surface 9 of the portable power generator 2. ing. In other words, the surface 511 of the high temperature section 51 is inclined with respect to the installation surface 9 . The inclination angle of the surface 511 of the high temperature portion 51 with respect to the installation surface 9 is, for example, approximately 10° or more and 40° or less. However, the inclination angle of the surface 511 of the high temperature portion 51 with respect to the installation surface 9 is not necessarily limited to 10° or more and 40° or less. Details of the inclination angle of the surface 511 of the high temperature portion 51 will be described later. In the portable power generator 2 according to this embodiment, the axis 42 of the burner 4 extends in the direction A1 perpendicular to the installation surface 9 , so the surface 511 of the high-temperature portion 51 is the surface of the flame 41 emitted from the burner 4 . and inclined with respect to the exhaust gas emission direction.

The fins 512 of the high temperature portion 51 extend along the inclination direction of the surface 511 of the high temperature portion 51 (that is, the direction connecting the lower side of the slope and the upper side of the slope). As a result, the high-temperature section 51 allows the exhaust gas emitted from the burner 4 to flow more smoothly along the surface 511 of the high-temperature section 51 , and allows the exhaust gas to flow more smoothly to the outside of the portable power generator 2 through the exhaust mixing section 7 . It can be discharged smoothly.

The low temperature section 52 is arranged above the high temperature section 51 so as to face the high temperature section 51 and is kept at a temperature lower than that of the high temperature section 51 . In the portable power generator 2 according to the present embodiment, the low-temperature section 52 is cooled by air sent from the blower 54 arranged above the low-temperature section 52 so as to face the low-temperature section 52, and has a temperature lower than that of the high-temperature section 51. is held to The low temperature section 52 is made of a known metal such as aluminum. As depicted in FIG. 2, the cold section 52 is, for example, a finned heat sink having a plurality of fins 522 . According to this, the low temperature section 52 is efficiently cooled by the air sent from the blower 54 and is reliably maintained at a temperature lower than that of the high temperature section 51 . It should be noted that the low temperature section 52 is not necessarily limited to a heat sink with fins. In the following description, the case where the low temperature section 52 is a finned heat sink having a plurality of fins 522 will be taken as an example.

As shown in FIG. 1 , the surface 521 of the low temperature section 52 is inclined with respect to the direction A1 perpendicular to the installation surface 9 of the portable power generation device 2 and parallel to the surface 511 of the high temperature section 51 . In other words, the surface 521 of the low temperature section 52 is inclined with respect to the installation surface 9 and parallel to the surface 511 of the high temperature section 51 . In the portable power generator 2 according to the present embodiment, the axis 42 of the burner 4 extends in the direction A1 orthogonal to the installation surface 9 , so the surface 521 of the low temperature section 52 is the surface of the flame 41 emitted from the burner 4 . and inclined with respect to the exhaust gas emission direction.

The fins 522 of the low temperature portion 52 extend along the inclination direction of the surface 521 of the low temperature portion 52 (that is, the direction connecting the lower part of the inclination and the upper part of the inclination). As a result, the low temperature section 52 can flow the air sent from the blower 54 along the surface 521 of the low temperature section 52 more smoothly, and the air sent from the blower 54 can flow through the exhaust mixing section 7 to the portable power generator 2 . can be discharged more smoothly to the outside of the

The thermoelectric element 53 is sandwiched between the high temperature section 51 and the low temperature section 52 and generates power based on the temperature difference between the high temperature section 51 and the low temperature section 52 . The thermoelectric element 53 uses the Seebeck effect to generate a thermoelectromotive force, and is also called a thermoelectric conversion element or a thermoelectric generation element. The thermoelectric element 53 can generate more thermoelectromotive force when the temperature difference between the high temperature portion 51 and the low temperature portion 52 is approximately 100.degree. C. to 150.degree.

The guide portion 6 is provided on the burner 4 side when viewed from the high temperature portion 51 and is fixed to the high temperature portion 51, for example. The guide portion 6 has a first inner surface 61 and a second inner surface 62 . As shown in FIGS. 1 and 2 , in the portable power generator 2 according to this embodiment, the second inner surface 62 of the guide portion 6 is in contact with the tip portions 513 of the fins 512 of the high temperature portion 51 . The first inner surface 61 of the guide portion 6 is connected to the second inner surface 62 and is separated from the tip portions 513 of the fins 512 of the high temperature portion 51 while extending from the connection portion with the second inner surface 62 to the flame port 43 of the burner 4 . extending towards. A lower end portion 64 of the guide portion 6 is arranged below a position 65 where the shaft 42 of the burner 4 and the lower portion of the high temperature portion 51 intersect. In the present embodiment, the flame 41 is positioned to contact the tips 513 of the fins 512 of the high temperature portion 51 , but if the burner 4 is on the shaft 42 , the flame 41 is positioned not to contact the tips 513 of the fins 512 of the high temperature portion 51 . may be in

The guide portion 6 forms a channel 63 that guides the exhaust gas emitted from the burner 4 . The flow path 63 has a first space 631 sandwiched between a plane including the tip portions 513 of the fins 512 of the high temperature portion 51 and the first inner surface 61 of the guide portion 6 . Further, the flow path 63 has a second space 632 surrounded by the surface 511 of the high temperature portion 51 , the side surfaces 514 of the fins 512 of the high temperature portion 51 , and the second inner surface 62 of the guide portion 6 . For example, as indicated by arrows A2, A3, and A4 shown in FIG. Guided up the slope. Note that the guide portion 6 is not limited to being fixed to the high temperature portion 51 as long as it forms the flow path 63 that guides the exhaust gas emitted from the burner 4 upward along the surface 511 of the high temperature portion 51 . Instead, it may be fixed to the housing 21, for example.

The baffle plate 8 is arranged at the lower end portion 515 of the high temperature portion 51 . The baffle plate 8 may be fixed to the high temperature section 51 or may be fixed to the housing 21 . As indicated by an arrow A7 shown in FIG. 1, the baffle plate 8 guides the exhaust gas flowing in the direction opposite to the arrows A2, A3, and A4 shown in FIG. That is, the baffle plate 8 allows the exhaust gas flowing in the direction opposite to the arrows A2, A3, and A4 shown in FIG. rises in the gap between and prevents flow toward the cold section 52 . In other words, the baffle plate 8 prevents the exhaust gas flowing in the direction opposite to the arrows A2, A3, and A4 shown in FIG. As a result, the heat of the exhaust gas emitted from the burner 4 can be effectively used, and the deterioration of the heating efficiency of the high temperature section 51 can be suppressed. Alternatively, it is possible to prevent the cooling of the low temperature section 52 from being hindered by the heat of the exhaust gas.

The blower 54 is arranged to face the low temperature section 52 . The blower 54 is driven by being supplied with the electromotive force generated by the thermoelectric element 53 , and sends air to the low temperature section 52 to cool the low temperature section 52 . For example, blower 54 is an axial fan having motor 541 and propeller 542 . The motor 541 is driven by electric power supplied from the thermoelectric element 53 . The propeller 542 is rotated by the rotational force transmitted from the motor 541, sucks air from the suction port 544, and sends the air to the low temperature section 52 as cooling air.

Here, the axis 543 of the blower 54 is orthogonal to the surface 521 of the low temperature section 52 . Therefore, the blower 54 sends air in a direction orthogonal to the surface 521 of the low temperature section 52, as indicated by arrow A5 shown in FIG. 1, for example. Thereby, the blower 54 can efficiently send air to the space 524 sandwiched between the side surfaces 523 of the fins 522 adjacent to each other and efficiently cool the surface 521 of the low temperature section 52 . 1, the air sent from the blower 54 toward the low temperature section 52 flows through the space 524 sandwiched between the side surfaces 523 of the fins 522 adjacent to each other. It is guided up the slope along surface 521 . In the present embodiment, an example in which the shaft 543 of the blower 54 is orthogonal to the surface 521 of the low-temperature part 52 was given, but the blower 54 is not limited to this, and the size, internal structure, etc. Depending on the design conditions of the apparatus 2, the air may be sent not in a direction orthogonal to the surface 521 of the low temperature section 52 but in an oblique or parallel direction.

Also, the opening area at the lower end 525 of the low temperature section 52 may be smaller than the opening area of the space 524 at the portion above the lower end 525 . The term "opening area" as used herein refers to the opening area on a plane perpendicular to the direction of the arrow A21 shown in FIG. According to this, compared to the case where the opening area at the lower end portion 525 of the low temperature portion 52 is the same as or wider than the opening area of the space 524 at the portion above the lower end portion 525, the lower portion of the low temperature portion 52 The amount of cooling air flowing in the direction opposite to arrow A6 shown in FIG. As a result, the air sent from the blower 54 toward the low temperature section 52 can be more reliably guided upward along the surface 521 of the low temperature section 52 as indicated by the arrow A6 shown in FIG.

The exhaust mixing section 7 is provided on the downstream side of the air flow when viewed from the high temperature section 51 and the low temperature section 52 . The exhaust mixing section 7 forms a flow path 71 for mixing the air containing the exhaust gas flowing along the surface 511 of the high temperature section 51 and the air containing the cooling air flowing along the surface 521 of the low temperature section 52. , the air mixed in the flow path 71 is led to the outside of the housing 21 through the exhaust port 72 . That is, the air containing the exhaust gas that has flowed along the surface 511 of the high temperature section 51 and the air containing the cooling air that has flowed along the surface 521 of the low temperature section 52 are separated from each other by the flow path 71 formed by the exhaust mixing section 7. , mixed in the flow path 71 , and discharged to the outside of the housing 21 through the exhaust port 72 . The exhaust mixing section 7 includes a flow path 71 for mixing the air containing the exhaust gas flowing along the surface 511 of the high temperature section 51 and the air containing the cooling air flowing along the surface 521 of the low temperature section 52. It may be fixed to at least one of the high temperature section 51 and the low temperature section 52 or may be fixed to the housing 21 as long as it is formed.

Next, the operation of the portable power generator 2 according to this embodiment will be described.
First, when the user rotates the operation knob 33, an electrode (not shown) provided near the burner 4 is discharged by the pulse voltage generated by the rotation of the operation knob 33, and the fuel gas is accommodated. The fuel gas supplied from the container 31 to the burner 4 is burned. As a result, flame 41 is emitted from flame port 43 of burner 4 . Exhaust gas is emitted from the flame port 43 of the burner 4 together with the emission of the flame 41 .

Then, the high temperature portion 51 is heated by receiving heat transmitted from the flame 41 at the surface 511 and the fins 512 . Also, the exhaust gas emitted from the burner 4 flows toward the high temperature section 51 . Therefore, the high temperature portion 51 is heated by receiving heat transmitted from the exhaust gas at the surface 511 and the fins 512 .

Here, as described above, the surface 511 of the high temperature section 51 is inclined with respect to the direction A1 perpendicular to the installation surface 9 of the portable power generator 2 . Therefore, the heat of the flame 41 emitted from the burner 4 is transmitted along the surface 511 of the high temperature portion 51 inclined with respect to the direction A1 perpendicular to the installation surface 9 . Therefore, the heat of the flame 41 can be suppressed from being transmitted to a local portion of the high temperature portion 51 , and the entire surface 511 of the high temperature portion 51 can be uniformly heated by the heat of the flame 41 .

1, the exhaust gas emitted from the burner 4 flows through the first space 631 and the second space 632 of the flow path 63 formed by the guide part 6, It flows along the surface 511 of the high temperature portion 51 that is inclined with respect to the direction A1 perpendicular to the installation surface 9 . Therefore, it is possible to prevent the exhaust gas emitted from the burner 4 from being trapped in a local portion of the high temperature section 51 . Therefore, the heat of the exhaust gas can be suppressed from being transmitted to local portions of the high temperature portion 51, and the entire surface 511 of the high temperature portion 51 can be uniformly heated by the heat of the exhaust gas.

As a result, the surface 511 of the high temperature portion 51 is efficiently heated by the flame 41 emitted from the burner 4 and the exhaust gas. Further, since it is possible to suppress local heating of a predetermined portion of the high temperature portion 51 , it is possible to suppress transmission of the heat of the flame 41 and the exhaust gas to the low temperature portion 52 via the high temperature portion 51 . Therefore, the temperature difference between the high temperature section 51 and the low temperature section 52 can be generated efficiently.

When a temperature difference occurs between the high temperature section 51 and the low temperature section 52 , the thermoelectric element 53 generates power based on the temperature difference between the high temperature section 51 and the low temperature section 52 . 1, the blower 54 is driven by being supplied with the electromotive force generated by the thermoelectric element 53, and sends air to the low temperature section 52 to cool the low temperature section 52. As shown in FIG. That is, the blower 54 is driven by being supplied with the electromotive force generated by the thermoelectric element 53 to generate forced convection on the surface 521 of the low temperature section 52 . Thereby, the blower 54 forcibly cools the low temperature section 52 . Therefore, the temperature difference between the high temperature section 51 and the low temperature section 52 can be generated efficiently.

As described above, the surface 521 of the low temperature section 52 is inclined with respect to the direction A1 perpendicular to the installation surface 9 of the portable power generator 2 and parallel to the surface 511 of the high temperature section 51 . Therefore, for example, as indicated by arrow A6 shown in FIG. It is guided up the slope along surface 521 .

The air containing the exhaust gas that has flowed along the surface 511 of the high temperature section 51 is guided to the flow path 71 formed by the exhaust mixing section 7 . Also, the air containing the cooling air flowing along the surface 521 of the low temperature section 52 is guided to the flow path 71 formed by the exhaust mixing section 7 . The air containing the exhaust gas flowing along the surface 511 of the high temperature section 51 and the air containing the cooling air flowing along the surface 521 of the low temperature section 52 are mixed in the flow path 71 of the exhaust mixing section 7. , is discharged to the outside of the housing 21 through the exhaust port 72 .

According to the portable power generation device 2 according to the present embodiment, since the surface 511 (surface that receives heat) of the high temperature portion 51 is inclined with respect to the direction A1 perpendicular to the installation surface 9 of the portable power generation device 2, The heat of the flame 41 emitted from the burner 4 is transmitted along the surface 511 of the high temperature portion 51 inclined with respect to the direction A1 perpendicular to the installation surface 9 . Therefore, the heat of the flame 41 can be suppressed from being transmitted to a local portion of the high temperature portion 51 , and the entire surface 511 of the high temperature portion 51 can be uniformly heated by the heat of the flame 41 . Further, the exhaust gas emitted from the burner 4 flows along the surface 511 of the high temperature portion 51 that is inclined with respect to the direction perpendicular to the installation surface 9 . Therefore, it is possible to prevent the exhaust gas emitted from the burner 4 from being trapped in a local portion of the high temperature section 51 . Therefore, the heat of the exhaust gas can be suppressed from being transmitted to local portions of the high temperature portion 51, and the entire surface 511 of the high temperature portion 51 can be uniformly heated by the heat of the exhaust gas. As a result, the surface 511 of the high temperature portion 51 is efficiently heated by the flame 41 emitted from the burner 4 and the exhaust gas. Further, since it is possible to suppress local heating of a predetermined portion of the high temperature portion 51 , it is possible to suppress transmission of the heat of the flame 41 and the exhaust gas to the low temperature portion 52 via the high temperature portion 51 . Therefore, the temperature difference between the high temperature section 51 and the low temperature section 52 can be generated efficiently. As a result, the power generation amount and power generation efficiency of the portable power generator 2 according to this embodiment can be improved.

The voltage value supplied by the portable power generator 2 is not particularly limited, and is, for example, 5V or 12V. The connection terminal to which the portable power generator 2 supplies voltage is not particularly limited, and includes, for example, a USB (Universal Serial Bus), a cigarette lighter socket (cigarette socket) mounted on a vehicle, an accessory socket, and the like.

Further, as described above, the portable power generator 2 according to this embodiment includes the guide portion 6 that forms the flow path 63 that guides the exhaust gas emitted from the burner 4 . According to the portable power generation device 2 according to the present embodiment, the exhaust gas emitted from the burner 4 is guided upward in the inclined direction in the flow path 63 formed by the guide portion 6, and is directed perpendicularly to the installation surface 9. It flows more reliably along the surface 511 of the hot portion 51 which is inclined with respect to A1. Therefore, the heat of the exhaust gas can be further suppressed from being transmitted to local portions of the high temperature portion 51 , and the entire surface 511 of the high temperature portion 51 can be uniformly heated by the heat of the exhaust gas. In addition, since the exhaust gas having a temperature higher than the temperature of the gas existing outside the flow passage 63 of the guide portion 6 flows through the inside of the flow passage 63 of the guide portion 6, the guide portion 6 serves as a chimney and a chimney effect occurs. . Therefore, the exhaust gas emitted from the burner 4 can be further prevented from being clogged locally in the high temperature portion 51, and the entire surface 511 of the high temperature portion 51 can be uniformly heated by the heat of the exhaust gas. As a result, the power generation amount and power generation efficiency of the portable power generator 2 according to the present embodiment can be further improved.

Also, the second inner surface 62 of the guide portion 6 is in contact with the tip portion 513 of the fin 512 of the high temperature portion 51 . Therefore, for example, as indicated by arrows A2, A3, and A4 shown in FIG. Exhaust gas can be guided upward along the surface 511 of the portion 51 . That is, when the interval between the adjacent fins 512 is relatively narrow, the exhaust gas emitted from the burner 4 is sandwiched between the side surfaces 514 of the adjacent fins 512 due to the pressure loss occurring at the tips 513 of the fins 512. It may be difficult to enter the space (ie, the second space 632). On the other hand, in the portable power generator 2 according to the present embodiment, the second inner surface 62 of the guide portion 6 is in contact with the tip portion 513 of the fin 512 of the high temperature portion 51, so the guide portions 6 are adjacent to each other. Exhaust gas can be guided more reliably into the space sandwiched by the side surfaces 514 of the fins 512 that are aligned.

A lower end portion 64 of the guide portion 6 is arranged below a position 65 where the shaft 42 of the burner 4 and the lower portion of the high temperature portion 51 intersect. Therefore, the guide portion 6 prevents the exhaust gas emitted from the burner 4 from escaping to the outside of the guide portion 6 , and can reliably guide the exhaust gas emitted from the burner 4 through the flow path 63 . As a result, the power generation amount and power generation efficiency of the portable power generator 2 according to the present embodiment can be further improved.

Furthermore, according to the portable power generator 2 according to the present embodiment, the blower 54 is driven by being supplied with the electromotive force generated by the thermoelectric element 53 to generate forced convection on the surface 521 of the low temperature section 52 . Therefore, the temperature difference between the high temperature section 51 and the low temperature section 52 can be generated efficiently. As a result, the power generation amount and power generation efficiency of the portable power generator 2 according to the present embodiment can be further improved. Further, the exhaust mixing section 7 has a flow path 71 for mixing the air containing the exhaust gas flowing along the surface 511 of the high temperature section 51 and the air containing the cooling air flowing along the surface 521 of the low temperature section 52. Form. As a result, the exhaust gas emitted from the burner 4 and guided to the flow path 71 of the exhaust mixing section 7 is forcibly discharged to the outside of the portable power generator 2 through the exhaust port 72 . In addition, since the air containing the exhaust gas is mixed with the air containing the cooling air sent from the blower 54 in the flow path 71 of the exhaust mixing unit 7, the temperature of the air discharged to the outside of the portable power generator 2 can be suppressed. can be done.

Next, a portable power generator according to a modification of this embodiment will be described.
Note that if the constituent elements of the portable power generation device 2A according to this modification are the same as the constituent elements of the portable power generation device 2 according to the present embodiment described above with reference to FIGS. Descriptions will be omitted as appropriate, and differences will be mainly described below.

FIG. 3 is a plan view showing a portable power generator according to a modification of this embodiment.
3 corresponds to a plan view when viewed from the direction of arrow A21 shown in FIG. In FIG. 3, the housing 21 and the exhaust mixing section 7 are omitted for convenience of explanation.

As shown in FIG. 3 , in the portable power generator 2A according to this modification, the second inner surface 62 of the guide portion 6 is separated from the tip portion 513 of the fin 512 of the high temperature portion 51 toward the burner 4 side. Specifically, the second inner surface 62 of the guide portion 6 is separated from the tip end portion 513 of the fin 512 of the high temperature portion 51 in the normal direction of the surface 511 of the high temperature portion 51 . Therefore, the flow path 63 formed by the guide portion 6 has a first space 631 (see FIG. 1), a second space 632 and a third space 633 .

First space 631 and second space 632 are as described above with respect to FIGS. In the portable power generator 2A according to this modified example, the flow path 63 formed by the guide portion 6 further has a third space 633 . The third space 633 is a space sandwiched between a plane including the tip portions 513 of the fins 512 of the high temperature portion 51 and the second inner surface 62 of the guide portion 6 . In this respect, the portable power generator 2A according to this modified example is different from the portable power generator 2 according to this embodiment described above with reference to FIGS. 1 and 2 . Other structures are the same as those of the portable power generator 2 according to the present embodiment described above with reference to FIGS. 1 and 2 .

The exhaust gas emitted from the burner 4 flows through the first space 631 of the flow path 63 formed by the guide portion 6 and then flows through the second space 632 and the third space 633 of the flow path 63 . At this time, the pressure loss in the third space 633 is lower than the pressure loss in the second space 632, and a chimney effect is generated by the guide portion 6. It can lead to the third space 633 of the channel 63 through the first space 631 . Thereby, complete combustion of the fuel gas supplied to the burner 4 can be promoted. As described above, according to the portable power generator 2A according to the present modification, the air not containing the exhaust gas can be efficiently introduced into the flow path 63 formed by the guide portion 6, and the air is supplied to the burner 4. Complete combustion of the fuel gas can be promoted. Moreover, the same effects as those described above with reference to FIGS. 1 and 2 can be obtained.

Next, an example of the results of studies conducted by the inventor will be described with reference to the drawings.
FIG. 4 is a table showing an example of the results of studies conducted by the inventors.
FIG. 5 is a graph showing an example of the relationship between the tilt angle of the first sample shown in FIG. 4 and the maximum power generation amount.
FIG. 6 is a graph showing an example of the relationship between the tilt angle of the second sample shown in FIG. 4 and the maximum power generation amount.
5 and 6, the horizontal axis represents the inclination angle (°) of the surface 511 of the high temperature portion 51 with respect to the installation surface 9. As shown in FIG. The vertical axis represents the maximum power generation (W) of the thermoelectric element 53 .

The inventors studied the relationship between the inclination angle (°) of the surface 511 of the high temperature portion 51 with respect to the installation surface 9 and the maximum power generation (W) of the thermoelectric element 53 . A first sample and a second sample shown in FIG. 4 are examples of the high temperature portion 51 of the present embodiment, and are finned heat sinks having a plurality of fins 512 . The size of the first sample is 100 mm long×100 mm wide×30 mm high. The interval between the fins of the first sample is 2 mm. On the other hand, the size of the second sample is 98 mm long×98 mm wide×30 mm high. The interval between the fins of the second sample is 6 mm. In this study, the position of the flame 41 of the burner 4 is the edge of each sample, or the lower edge if the surface of each sample is inclined with respect to the mounting surface 9 . That is, the flame 41 of the burner 4 is emitted toward the edge of each sample, and is emitted toward the lower edge when the surface of each sample is inclined with respect to the mounting surface 9 . Moreover, the distance between the surface of each sample and the flame port 43 of the burner 4 is 15 mm.

An example of the relationship between the "inclination angle (°)", the "combustion amount (kcal/h)", and the "maximum power generation amount (W)" for each of the first sample and the second sample is shown in FIG. is. An example of the relationship between the tilt angle (°) of the first sample and the maximum power generation (W) of the thermoelectric element 53 is shown in FIG. Further, an example of the relationship between the tilt angle (°) of the second sample and the maximum power generation (W) of the thermoelectric element 53 is shown in FIG. The “tilt angle (°)” in this study is the tilt angle of the surface 511 of the high temperature section 51 with respect to the installation surface 9 . Therefore, the inclination angle of the surface 511 of the high-temperature portion 51 with respect to the direction A1 perpendicular to the installation surface 9 is represented by "90° - inclination angle (°) in this study".

According to an example of the results shown in FIGS. 4 to 6, when the surface 511 of the high temperature portion 51 is inclined with respect to the installation surface 9 (that is, the inclination angles are 10°, 20°, 30°, and 40°) When the surface 511 of the high temperature portion 51 is not tilted with respect to the installation surface 9 (that is, when the tilt angle is 0°), the maximum power generation of the thermoelectric element 53 is greater than or equal to the maximum power generation of the thermoelectric element 53. be. Also, the maximum power generation amount of the thermoelectric element 53 increased as the tilt angle increased from 0° to 30°, and decreased as the tilt angle increased from 30° to 40°. That is, the maximum power generation amount of the thermoelectric element 53 was maximized when the tilt angle was 30° out of 0°, 10°, 20°, 30°, and 40°. According to the results of this study, the inclination angle of the surface 511 of the high temperature portion 51 with respect to the installation surface 9 is preferably about 10° or more and 40° or less, more preferably about 30°.

Further, according to the results of studies conducted by the present inventor, the maximum power generation amount when the position of the flame 41 of the burner 4 is at the center of the sample is It was found to be larger than the maximum power generation of Furthermore, the maximum It was found that the power generation amount was larger than the maximum power generation amount when the position of the flame 41 of the burner 4 was at the center of the sample. Therefore, according to the results of this study, the inclination angle of the surface 511 of the high temperature portion 51 with respect to the installation surface 9 is about 30°, and the position of the flame 41 of the burner 4 is between the center of the sample and the edge of the sample. It was found that the maximum power generation amount can be further improved when the position is .

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the claims. Some of the configurations of the above embodiments may be omitted, or may be arbitrarily combined in a manner different from the above.

2, 2A: Portable power generator 4: Burner 6: Guide part 7: Exhaust mixing part 8: Baffle plate 9: Installation surface 21: Case 22: Leg part 23: Extraction port 31 : Fuel gas storage container 32: Container connection part 33: Operation knob 34: Gas pipe 41: Flame 42: Shaft 43: Flame port 51: High temperature part 52: Low temperature part 53: Thermoelectric element 54: blower 61: first inner surface 62: second inner surface 63: flow path 64: lower end 65: position 71: flow path 72: exhaust port 511: surface 512: fins 513: Tip 514: Side 515: End 521: Surface 522: Fin 523: Side 524: Space 525: End 541: Motor 542: Propeller 543: Shaft 544: Intake mouth, 631: first space, 632: second space, 633: third space

Claims (4)

A portable power generation device that generates power using combustion heat and is transportable,
a burner for burning the fuel gas supplied from a fuel gas storage container in which the fuel gas is stored;
a high temperature section having a surface and a plurality of fins receiving heat transferred from the flame and exhaust gas emitted from the burner and heated by the heat ;
a low temperature section arranged to face the high temperature section and maintained at a temperature lower than that of the high temperature section;
a thermoelectric element that is sandwiched between the high temperature section and the low temperature section and that generates power based on a temperature difference that occurs between the high temperature section and the low temperature section;
a guide portion provided on the burner side when viewed from the high temperature portion;
with
the surface of the high -temperature portion is inclined with respect to a direction orthogonal to the installation surface of the portable power generation device,
The guide part is
a second inner surface in contact with the tip of the fin;
a first inner surface connected to the second inner surface and extending from a connecting portion of the second inner surface toward the flame port of the burner while being separated from the tip portion;
and forming a flow path that guides the exhaust gas upward along the surface of the high-temperature section to the upper side of the slope . A portable power generation device that generates power using combustion heat and is transportable,
a burner for burning the fuel gas supplied from a fuel gas storage container in which the fuel gas is stored;
a high temperature section having a surface and a plurality of fins receiving heat transferred from the flame and exhaust gas emitted from the burner and heated by the heat ;
a low temperature section arranged to face the high temperature section and maintained at a temperature lower than that of the high temperature section;
a thermoelectric element that is sandwiched between the high temperature section and the low temperature section and that generates power based on a temperature difference that occurs between the high temperature section and the low temperature section;
a guide portion provided on the burner side when viewed from the high temperature portion;
with
the surface of the high -temperature portion is inclined with respect to a direction orthogonal to the installation surface of the portable power generation device,
The guide part is
a second inner surface separated from the tip of the fin in the direction normal to the surface of the high temperature portion;
a first inner surface connected to the second inner surface and extending from a connecting portion of the second inner surface toward the flame port of the burner while being separated from the tip portion;
and forming a flow path that guides the exhaust gas upward along the surface of the high-temperature section to the upper side of the slope . 3. The portable power generator according to claim 1, wherein a lower end of said guide portion is arranged below a position where an axis of said burner and a lower portion of said high temperature portion intersect. an air blower disposed facing the low temperature section and driven by being supplied with an electromotive force generated by the thermoelectric element to send air to the low temperature section and cool the low temperature section;
Air containing the exhaust gas that has flowed along the surface of the high temperature section and air containing the cooling air sent from the blower that has flowed along the surface of the low temperature section are mixed, and the mixed air is sent to the outside. an exhaust mixing portion forming a flow path leading to
The portable power generator according to any one of claims 1 to 3, further comprising:

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