JP6040654B2 - Outdoor power generator - Google Patents

Description

  The present invention relates to an outdoor power generation apparatus having a ventilation structure that prevents intrusion of snow or rainwater into a housing while performing ventilation.

  In recent years, the diversification of power sources has been proposed, and the development and popularization of various types of distributed generators have been promoted. Initially, distributed generators were often applied to offices and apartment buildings. However, gas engine generators and fuel cells have been reduced in size and capacity, and are now also applied to ordinary households. It is coming. This type of distributed generator is often used as a cogeneration system that can use not only electrical output but also heat output. In general, a distributed power generation apparatus has a ventilation structure that exhausts warm air in a power generation chamber partitioned by a housing and takes in cold air from the outside to suppress the temperature rise of the generator main unit. In addition, when installing the distributed power generator outdoors, it is necessary to prevent snow and rainwater from entering the housing from the ventilation structure.

  One technical example of this type of outdoor power generator is disclosed in Patent Document 1. The fuel cell power generation device of Patent Literature 1 includes a ventilation fan that is disposed in an upper portion of a fuel / motor chamber and sucks out indoor air, and an exhaust duct that exhausts air and process exhaust from the ventilation fan to the outside of the housing. Yes. According to the description of the first embodiment, the exhaust duct extends vertically from the upper part toward the lower part, and the exhaust port provided in the lower part opens toward the outside of the housing. Furthermore, according to the description of the third embodiment, a sound absorbing material is attached to the inner surface of the exhaust duct. Thereby, it is described that an efficient ventilation structure can be provided in terms of environmental temperature management.

JP 2008-192528 A

  By the way, the sound-absorbing material on the inner surface of the exhaust duct in Patent Document 1 suppresses the noise generated by the generator main unit and the ventilation fan inside the power generation apparatus from leaking outside through the exhaust duct. However, since the exhaust duct is not bent, the noise propagates to the outside together with the exhaust, and the sound absorption effect is considered insufficient. Further, the gas engine generator tends to generate more noise than the fuel cell, and it is preferable that the gas engine generator has a better sound absorption performance than that of Patent Document 1. On the other hand, although the exhaust duct extends downward to prevent intrusion of snow and rainwater, the snow melting effect in the exhaust duct and in the vicinity of the exhaust port is not always sufficient. In other words, in cold regions, even if snow melts in the exhaust duct, there is a risk of icing near the exhaust port and hindering exhaust.

  Further, in a power generation device used as a cogeneration system, if the air around a hot water storage tank or a heat exchanger that uses heat output is ventilated, heat energy is dissipated and heat utilization efficiency is reduced. For this reason, the ventilation structure which can make compatible suppression of the temperature rise of a generator main machine and maintenance of high heat utilization efficiency is desired. Furthermore, the conventional ventilation structure is not necessarily a simple configuration, and there is a strong demand to reduce the number of constituent members, the number of processing steps, and the cost.

  This invention is made | formed in view of the problem of the said background art, and makes it the problem which should be solved to provide the outdoor installation type power generator which has the ventilation structure excellent in the sound absorption performance and the snow melting performance.

The outdoor installation type power generation device of the present invention includes a housing that is installed outdoors and divides a power generation chamber, an engine generator provided in the power generation chamber or a power generation unit that is mainly configured by a fuel cell, and the power generation chamber And an exhaust passage that communicates with the outside of the housing, and a ventilation fan that exhausts the air in the power generation chamber to the outside of the housing via the exhaust passage, and the exhaust passage is a sound absorbing duct made of a sound absorbing material Formed at the lower start, communicated with the power generation chamber at the lower starting end, and curved upwardly toward the upper end, and formed adjacent to the rising curved passage, and at the upper starting end, the upward curved passage. communicating with the end of the passage, seen including a descending passage which opens from the ventilation outlet provided in the housing at the bottom end to the outside, the, between the descending passage and the rising piece run channel was erected Passage formation The sound absorbing duct is held by using the passage forming panel and a part of the auxiliary device of the power generation power source, and the power generation power source is used for a cogeneration system that obtains not only an electric output but also a heat output. A part of the auxiliary equipment of the power generation source that holds the sound absorption duct includes at least one of a hot water storage tank that stores the heat output and a heat exchanger that can supply the heat output to the outside.

  Further, the interior of the housing is divided into a lower power generation chamber and an upper heat utilization chamber by a partition panel, and the ventilation fan is provided with at least one of the hot water storage tank and the heat exchanger. It is preferable not to exhaust air in the heat utilization chamber.

  The rising curved passage and the descending passage are partitioned by a standing passage forming panel, and the interior of the housing is divided into a plurality of chambers by a partition panel, The panel may be fixed to the partition panel.

  In the outdoor installation type power generation device of the present invention, the exhaust passage for discharging the air in the power generation chamber includes an upward curved passage formed by a sound absorbing duct made of a sound absorbing material, and a downward opening that communicates with the upward curved passage and opens to the outside Including a passageway. For this reason, when the air in the power generation room rises while curving in the sound absorption duct, the vibration component of the noise is absorbed and attenuated by the sound absorption duct, and the partially reflected noise is further attenuated by the next curvature. Eventually, noise hardly propagates outside. Therefore, as compared with the conventional technology such as Patent Document 1, an outdoor installation type power generation device having a ventilation structure with excellent sound absorption performance can be provided.

  Also, due to the influence of weather conditions such as heavy snowstorms and heavy rains, even if snow or rainwater enters the descending passage from the exhaust port of the housing, the descending passage hardly reverses against the gravity and exhaust flow. . In addition, the snow that has entered the descending passage is reliably melted by the wall surface warmed by warm exhaust and warm air in the power generation chamber, and drained out of the housing. Therefore, it is possible to provide an outdoor installation type power generator having a ventilation structure with excellent snow melting performance.

Further, since the sound absorbing duct is held by utilizing a part of the auxiliary power source and the passage forming panels, the cost can be reduced by reducing the number of components. More specifically, the sound-absorbing material forming the sound-absorbing duct does not have sufficient rigidity to stably stand on its own, and in the prior art, the sound-absorbing duct is housed in a dedicated box and used. In this aspect, since the sound absorbing duct is held by effectively using a member that can be disposed in the vicinity of the sound absorbing duct, a dedicated box is not required and the cost can be reduced.

Further, since the power source is used in cogeneration systems, using at least one of the hot water storage tank and the heat exchanger for heat output can hold the sound absorbing duct, reduce the cost by reducing the number of components it can.

  Furthermore, in the aspect in which the inside of the housing is divided into the power generation chamber and the heat utilization chamber by the division panel, the air in the heat utilization chamber is not discharged. For this reason, the air around at least one of the hot water storage tank and the heat exchanger in the heat use room is not ventilated, and heat dissipation is suppressed and high heat use efficiency can be maintained.

  Moreover, in the aspect by which the channel | path formation panel was fixed to the division panel, a process man-hour can be reduced and cost can be reduced. More specifically, in the conventional method, a fixing bolt is welded to the housing, and the passage forming panel is fastened and fixed to the fixing bolt. In this conventional method, since welding marks and welding distortion occur on the surface of the housing, it takes time for repairs and increases the number of processing steps. In this aspect, for example, a simple fixing structure in which welding is not performed, such as providing fixing holes in the passage forming panel and the partition panel and fastening them together with bolts and nuts, can be employed. Also, unlike the housing, it is fixed inside the device, so it is possible to reduce consideration for environmental resistance and appearance. For these two reasons, the number of processing steps can be reduced and the cost can be reduced.

It is a perspective view explaining the outdoor installation type power generator of the embodiment of the present invention. It is a front view explaining the exhaust passage of the outdoor installation type power generator of an embodiment. It is the perspective view which showed arrangement | positioning of the member which forms an exhaust passage. It is a disassembled perspective view of a sound absorption duct.

  An embodiment for carrying out the present invention will be described with reference to FIGS. FIG. 1 is a perspective view illustrating an outdoor installation type power generation apparatus 1 according to an embodiment of the present invention, and a lower part is omitted. In FIG. 1, the front right side of the drawing is the front, a part of the exterior panel forming the housing 3 is shown in an exploded state, and another part is omitted. FIG. 2 is a front view for explaining the exhaust passage 4 of the outdoor installation type power generator 1 of the embodiment. The outdoor installation type generator 1 of embodiment is provided with the gas engine generator 2 as a main machine, and is used as a cogeneration system. In addition to the gas engine generator 2, the outdoor installation type generator 1 includes a housing 3, an exhaust passage 4, a ventilation fan 5, a hot water storage tank 6, a plate heat exchanger 7, and the like.

  The housing 3 is formed by four support columns 31 erected at the four corners of the apparatus and six exterior panels. The exterior panel includes a front panel, a right side panel, a left side panel 33, a rear panel 34, a top panel 35, and a bottom panel. In FIG. 1, a left side panel 33, a rear panel 34, and a top panel 35 are shown, and the remaining three exterior panels are omitted. In FIG. 2, the front panel and the column 31 are omitted. The front panel, the right side panel, the left side panel 33, and the rear panel 34 are each fixed to the two support columns 31, and define the four circumferences of the device 1. The top panel 35 is fixed to the upper ends of the four columns 31 and defines the upper part of the apparatus 1. An unillustrated bottom plate panel is fixed to the lower ends of the four columns 31 and defines the lower part of the apparatus 1. The housing 3 partitions the internal space of the device 1 from the outside.

  At the middle height inside the housing 3, the partition panel 36 is fixed to the four support columns 31 and provided horizontally. The partition panel 36 divides the internal space into a lower power generation chamber 3E and an upper heat utilization chamber 3H. On the bottom plate panel in the power generation chamber 3E, a gas engine generator 2 (shown by a broken line) is provided. A hot water storage tank 6 is provided on the side of the heat utilization chamber 3H close to the rear surface on the sorting panel 36. The exhaust passage 4 and the plate heat exchanger 7 are provided on the left side near the front surface on the division panel 36. Although not shown in the drawing, the cooling pipe extends from the gas engine generator 2 and passes through the partition panel 36 to communicate with the hot water storage tank 6 and the plate heat exchanger 7. The coolant is circulated in the cooling pipe by a circulation pump (not shown), and the heat output of the gas engine generator 2 is transferred to the hot water storage tank 6 and the heat exchanger 7.

  A total of eight exhaust ports 331 are formed at positions slightly higher than the division panel 36 near the front surface of the left side panel 33. The exhaust port 331 has a shape that is long in the horizontal direction, and is arranged with four vertically and two horizontally, and a hood 335 is attached to each. The hood 335 has a function of discharging exhaust gas downward and suppressing entry of snow and rainwater into the housing 3.

  A total of eight air supply ports 332 are formed at positions slightly lower than the exhaust ports 331 near the rear surface of the left side panel 33. Eight air supply ports 332 are arranged vertically, and have the same shape as the exhaust port 331, and a hood 335 is also provided. An air supply passage 37 extending in the vertical direction is formed on the front left side of the rear panel 34 in the housing 3. The air supply passage 37 communicates the air supply port 332 with the inside of the power generation chamber 3E, and supplies external cold air into the power generation chamber 3E. Part of the supplied air is taken into the engine cylinder of the gas engine generator 2 and used for combustion of fuel gas. Since known techniques can be applied as appropriate to the structure of the gas engine generator 2 and the type of fuel gas, the description thereof is omitted. Exhaust gas generated by the combustion is discharged to the outside through an exhaust pipe (not shown). The air in the power generation chamber 3E is heated by the heat generated by the gas engine generator 2 main body and the residual heat of the exhaust pipe.

  The ventilation fan 5 is disposed by cutting away the left side close to the front surface of the division panel 36. As the ventilation fan 5, a general fan driven by a motor can be used. The ventilation fan 5 blows warm air in the power generation chamber 3E upward.

  The exhaust passage 4 is indicated by a thick broken line in FIG. 2, and is a warm air passage from the ventilation fan 5 to the exhaust port 331. The exhaust passage 4 is formed by an upward curved passage 4U and a downward passage 4D. FIG. 3 is a perspective view showing the arrangement of members forming the exhaust passage 4. The rising curved passage 4U is formed using a sound absorbing duct 41 made of a sound absorbing material. The descending passage 4 </ b> D is formed using the left side panel 33, the passage forming panel 42, and the seal material 43.

  FIG. 4 is an exploded perspective view of the sound absorbing duct 41, and the left front side in the drawing is an upper side when incorporated in the apparatus 1, and the upper side in the drawing is spaced apart from the left side panel 33. As shown in the figure, the sound absorbing duct 41 includes a main duct member 411 made of a sound absorbing material, a front duct member 414, and a rear duct member 417. Although the foamed urethane is used as the sound absorbing material, the material is not limited to this, and a porous body made of a material different from the foamed urethane, a cloth, a fiber assembly, or the like may be used.

  The overall shape of the main duct member 411 is a rectangle having a thickness T and long in the vertical direction. Inside the main duct member 411, a substantially S-shaped upward curved passage 4U extending from the bottom to the top is formed. Below the rising curved passage 4U is a starting end opening 412 that opens downward. The overall shape of the front duct member 414 is a rectangular thin plate that substantially matches the main duct member 411. A terminal opening 415 that opens laterally toward the left side panel 33 is formed near the upper side of the front duct member 414. The terminal opening 415 is open at the top of the rising curved passage 4U. The overall shape of the rear duct member 417 is a rectangular thin plate that substantially matches the main duct member 411.

  The front duct member 414, the main duct member 411, and the rear duct member 417 are laminated and pasted in the order described. Thereby, the rising curved path 4U becomes a closed space except for two places, the start end opening 412 and the end opening 415. The start end opening 412 is disposed to face the outlet side of the ventilation fan 5 and communicates with the power generation chamber 3 </ b> E via the ventilation fan 5. The end opening 415 communicates with the upper end of a lower passage 4D described later.

  The ascending curved path 4U is preferably formed so as to perform a plurality of two-dimensional or three-dimensional curvatures. As a curved form, in addition to the substantially S-shape of the embodiment, Σ A character shape etc. can be illustrated.

  As shown in FIG. 3, the sound absorbing duct 41 is held by a passage forming panel 42. The passage forming panel 42 is a plate-like member that is substantially equal to the rectangular size of the sound absorbing duct 41. Duct holding portions 421 that are bent at right angles are formed on the left and right sides of the passage forming panel 42. A part of the front duct member 414 and the main duct member 411 is sandwiched between the duct holding portions 421 on both sides, and the width direction of the sound absorbing duct 41 is held. In FIG. 3, a rectangular opening 422 is notched on the upper left side of the passage forming panel 42. The opening 422 overlaps the terminal opening 415 of the front duct member 414 and is wider than the terminal opening 415. In addition, two fixing holes 423 are formed in the lower edge of the passage forming panel 42.

  As shown in FIG. 3, a seal material 43 is disposed on the front side of the passage forming panel 42. The sealing material 43 has a frame shape having a rectangular parallelepiped space in the center, and the width direction dimension is substantially equal to that of the passage forming panel 42, and the height dimension is slightly smaller than that of the passage forming panel 4. The terminal opening 415 of the front duct member 414 and the opening 422 of the passage forming panel 42 communicate with the central rectangular parallelepiped space.

  The members in the range shown in FIG. 3 are fixed to the division panel 36 using the two fixing holes 423 of the passage forming panel 42. Specifically, as illustrated in FIG. 2, the periphery of the partition panel 36 is bent upward to form an end edge 361, and a fixing hole 362 is formed in the end edge 361. Therefore, the fixing hole 423 of the passage forming panel 42 and the fixing hole 362 of the partition panel 36 can be fixed by fastening the bolt 424 and the nut 425.

  Here, the lower side of the sound absorption duct 41 is held by the division panel 36. The upper side of the sound absorbing duct 41 is held by a sound absorbing material 351 attached to the back surface of the top panel 35. Further, the front duct member 414 side of the sound absorbing duct 41 is held by the passage forming panel 42. The rear duct member 417 side of the sound absorbing duct 41 is held by the hot water storage tank 6 and the plate heat exchanger 7. As described above, the width direction of the sound absorbing duct 41 is sandwiched and held between the duct holding portions 421 on both sides of the passage forming panel 42. Therefore, although the sound absorbing duct 41 does not have sufficient rigidity to stand stably, it is stably held by using the neighboring members 36, 351, 42, 6, 7, 421.

  Further, as shown in FIG. 2, the entire sealing material 43 is disposed in contact with the left side panel 33. As a result, a downward passage 4D is formed in a central rectangular parallelepiped space between the standing left side panel 33 and the passage formation panel 42 and surrounded by the sealing material 43. The upper end of the lower passage 4D communicates with the end opening 415 of the front duct member 414 through the opening 422 of the passage forming panel 42, that is, the upper end of the upward curved passage 4U. Further, the lower end of the lower passage 4 </ b> D opens to the outside from eight exhaust ports 331 provided in the left side panel 33.

  Next, operation | movement and an effect | action of the outdoor installation type power generator 1 of embodiment are demonstrated. When the gas engine generator 2 is started, the ventilation fan 5 is also driven, and noise during operation of the gas engine generator 2 and the ventilation fan 5 is generated. The ventilation fan 5 blows warm air in the power generation chamber 3E upward, and does not act on the air in the divided heat utilization chamber 3H. The warm air flows into the sound absorbing duct 41 from the start end opening 412 and rises while turning along a substantially S-shaped rising curved passage 4U. At this time, the vibration component of the noise is absorbed and attenuated by the sound absorbing duct 41, and the partially reflected noise is further attenuated in the next curve, and is significantly attenuated through a plurality of reflections. Then, the warm air flows out from the terminal opening 415 of the sound absorption duct 41 and flows into the upper end of the descending passage 4D. Further, the warm air descends the descending passage 4D and reaches the lower end, and is discharged to the outside from the exhaust port 331.

  When the air pressure in the power generation chamber 3E slightly decreases due to the discharge of warm air, external cold air automatically flows from the air supply port 332 via the air supply passage 37. Thereby, the inside of the power generation chamber 3E is ventilated.

  On the other hand, due to the influence of weather conditions such as heavy snowstorms and heavy rain, there is a possibility that snow and rainwater may temporarily enter the descending passage 4D from the exhaust port 331. In this case, snow or rainwater hardly rises against the flow of gravity and exhaust gas and moves backward in the descending passage 4D. In addition, the snow that has entered the descending passage 4D is reliably melted by the passage forming panel 42 heated by warm exhaust and warm air in the power generation chamber 3E, and drained out of the housing 3 from the lower exhaust port 331. The

  However, there is no risk of snow or rainwater entering when the gas engine generator 2 and the ventilation fan 5 are stopped. Even in such a case, according to the present embodiment, snow or rainwater hardly goes back down the descending passage 4D against gravity. Thereby, invasion of snow and rainwater into the ascending curved passage 4U and the power generation chamber 3E is suppressed.

  As described above, in the outdoor installation type power generator 1 of the present invention, the exhaust passage 4 includes the rising curved passage 4U and the downward passage 4D formed by the sound absorbing duct 41, so that the air in the power generation chamber 3E is bent. When rising while running, the vibration component of the noise is significantly attenuated, and finally the noise hardly propagates to the outside. In addition, even if snow or rainwater enters the descending passage 4D from the exhaust port 331 due to the influence of weather conditions such as heavy snowstorm or heavy rain, the descending passage 4D does not go backward against the flow of gravity and exhaust, It is reliably melted and drained out of the housing 3. Therefore, the outdoor installation type power generator 1 having a ventilation structure that is superior in sound absorption performance and snow melting performance as compared with the prior art such as Patent Document 1 can be provided.

  Furthermore, since the sound absorbing duct 41 is held using the passage forming panel 42, the hot water storage tank 6, the plate heat exchanger 7, and the like, a conventional dedicated box for storing the sound absorbing duct can be eliminated. In addition, since the passage forming panel 42 is fixed to the division panel 36, it is no longer necessary to repair the welding trace and welding distortion by welding the fixing bolt to the housing 3 which has been conventionally performed, and the environment resistance and appearance are improved. Consideration can be reduced. As a result, the number of components can be reduced, the number of processing steps can be reduced, and the cost can be reduced.

  Moreover, since the air in the heat utilization chamber 3H is not discharged, the air around the hot water storage tank 6 and the plate heat exchanger 7 is not ventilated, and the dissipation of heat energy is suppressed and high heat utilization efficiency can be maintained.

  In addition, it is also possible to replace the gas engine generator 2 as the generator main unit of the embodiment with a fuel cell. Moreover, the member holding the sound absorption duct 41 is not limited to the hot water storage tank 6 and the plate heat exchanger 7, and other auxiliary machines may be used. Various other applications and modifications are possible for the present invention.

1: Outdoor power generator 2: Gas engine generator 3: Housing 3E: Power generation room 3H: Heat utilization room 31: Support 33: Left side panel 331: Exhaust port 332: Air supply port 34: Rear panel 35: Top plate Panel 36: Division panel 4: Exhaust passage 4U: Ascending curve passage 4D: Down passage 41: Sound absorption duct 42: Passage formation panel 43: Sealing material 5: Ventilation fan 6: Hot water storage tank 7: Plate heat exchanger

Claims (3)

A housing that is installed outdoors and divides the power generation chamber, a power generation unit that is mainly configured by an engine generator or a fuel cell provided in the power generation chamber, and an exhaust that communicates the power generation chamber and the outside of the housing A ventilation fan that exhausts the air in the power generation chamber to the outside of the housing via the exhaust passage,
The exhaust passage is
An ascending curved passage formed of a sound absorbing duct made of a sound absorbing material, communicating with the power generation chamber at the lower end, and bending toward the upper end;
A downward passage formed adjacent to the upward curved passage, communicated with an end of the upward curved passage at the upper end, and opened to the outside from an exhaust port provided in the housing at the lower end;
Only including,
A space between the rising curved passage and the descending passage is partitioned by a standing passage forming panel,
The sound absorption duct is held using the passage forming panel and a part of the auxiliary device of the power generation source,
The power generation source is used in a cogeneration system that obtains not only electrical output but also heat output,
A part of the auxiliary equipment of the power generation source that holds the sound absorbing duct includes at least one of a hot water storage tank that stores the heat output and a heat exchanger that can supply the heat output to the outside. . The interior of the housing is divided into a lower power generation chamber and an upper heat utilization chamber by a partition panel,
The outdoor installation type power generation device according to claim 1 in which said ventilation fan does not exhaust air in said heat use room in which at least one of said hot water storage tank and said heat exchanger was provided. Between the rising curved passage and the descending passage, it is partitioned by a standing passage forming panel,
The interior of the housing is divided into a plurality of chambers by a dividing panel,
The outdoor installation type power generator according to claim 1 or 2 with which said passage formation panel is being fixed to said division panel.

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