WO2006112489A1

WO2006112489A1 - Arranging facility, parking facility, handling facility, and ventilation device

Info

Publication number: WO2006112489A1
Application number: PCT/JP2006/308253
Authority: WO
Inventors: Akihiko Sugata
Original assignee: Toyota Jidosha Kabushiki Kaisha
Priority date: 2005-04-14
Filing date: 2006-04-13
Publication date: 2006-10-26
Also published as: KR20070117647A; JPWO2006112489A1; US20090203306A1; DE112006000903T5; CN101160680A

Abstract

An arranging facility, a parking facility, a handling facility, and a ventilation device. A vehicle maintenance facility (10) as the arranging facility comprises a vehicle maintenance booth (20) as an arranging space and a forcible air supply/discharge mechanism. The vehicle maintenance booth is surrounded by side walls (24) and a ceiling wall (26) as partition walls on its periphery. A maintenance vehicle (110) on which a fuel battery as an energy converter is mounted is temporarily disposed in the vehicle maintenance booth. Also, the air supply/discharge mechanism comprises an air intake device (30) feeding air to the vehicle maintenance booth and an air discharge device (40) discharging the air from the vehicle maintenance booth to dilute hydrogen gas leaking from a vehicle under maintenance.

Description

Description Placement facility, parking lot facility, handling work facility and ventilation equipment

[Technical field] .

The present invention relates to an energy conversion device using a combustible gas or a facility for temporarily arranging a device equipped with the energy conversion device, for example, a facility for performing work for handling these devices.

[Background]

Development of devices that use fuel cells, including fuel cell vehicles, is actively underway. In fuel cells, hydrogen or other easily combustible gas is generally used as the fuel gas. Therefore, when conducting experiments, manufacturing, maintenance, inspections, etc. for devices using fuel cells, It is necessary to pay close attention to gas leaks. Japanese Patent Application Laid-Open No. 10-3100 2003 discloses a technique relating to an inspection facility for inspecting a general vehicle in an inspection room surrounded by walls. However, this document does not disclose a technique for preventing gas leakage.

In Japanese Patent Laid-Open No. 5 _ 1 8 0 4 7 8, in a sealed vehicle terminal (such as a bus terminal or a truck terminal) or a sealed parking lot (such as an underground parking lot), an air inlet is provided on the ceiling. A technique is disclosed in which an exhaust port is provided on the floor to increase the exhaust gas collection efficiency. In addition, in Japanese Patent Laid-Open No. 2 0 5-9 8 6 1 6, in order to efficiently ventilate an indoor parking lot, two cross flow fans are arranged side by side in the vertical direction so that the air currents merge. The structure which sets a mutual blowing direction is disclosed. However, the technologies in these documents are only considered for exhaust gas, and are not intended for fuel cell vehicle gas leakage.

In Japanese Laid-Open Patent Publication No. 2 0 0 5-3 5 3 3 4 6, in a closed facility such as an underground parking lot where a fuel cell vehicle is parked or stopped, the hydrogen concentration or hydrogen reduction amount of the vehicle and the volume of the facility The technology to determine the hydrogen concentration in the facility based on the ventilation capacity and perform ventilation is disclosed. However, in this document, the ventilator is simply on the ceiling of the facility. This is just a description of a configuration for providing a fan.

For example, a fuel cell vehicle includes many components such as fuel gas piping, and its structure is complicated. In particular, since it is difficult to prevent gas leaks from connecting parts between parts during inspection and maintenance work, workers are performing inspection and maintenance work with great care. '

However, if fuel cell vehicles become widespread in the near future, the vehicle maintenance is expected to be carried out in the same way as the current gasoline engine vehicles. Therefore, it is desirable to have an inspection and maintenance facility with countermeasures against gas leaks that can ensure sufficient safety even when workers perform daily maintenance. In particular, when hydrogen gas is colorless and odorless and workers cannot detect gas leaks themselves, it is highly necessary to introduce gas leak countermeasure technology. Considering the cost of introduction, it is preferable that such inspection and maintenance facilities can be realized by expanding the conventional inspection and maintenance facilities. '' It is also effective to install gas leak countermeasure technology to be installed in inspection and maintenance facilities in closed space facilities where fuel cell vehicles are parked or stored, such as garages at home, underground parking lots, and multilevel parking lots. . This is because even in such facilities, simple maintenance and inspections are performed, and gas leaks may occur.

These issues are not only for fuel cell vehicles but also for the fuel cells themselves and other devices equipped with fuel cells. Similar measures are also required for devices including a power mechanism using a combustible gas, such as a vehicle having an internal combustion engine using a combustible gas (for example, hydrogen, propane gas, natural gas).

[Disclosure of the Invention]

An object of the present invention is to introduce a gas leakage countermeasure technology to a facility that temporarily arranges an energy conversion device or a device equipped with the energy conversion device.

Another object of the present invention is to temporarily dispose an energy conversion device or a device equipped with the energy conversion device, and perform gas leakage to a facility that performs at least one of experiment, manufacturing, inspection, or maintenance of these devices. The technology is to introduce countermeasure functions. Still another object of the present invention is to establish a simple mode for improving a conventional inspection and maintenance facility for a gasoline engine vehicle to a vehicle inspection and maintenance facility using a combustible gas.

An arrangement facility according to the present invention includes an arrangement space in which an energy conversion device using a combustible gas as a fuel or a device on which the energy conversion device is mounted is temporarily arranged so as to be temporarily arranged. And a forcible supply / discharge mechanism for diluting the combustible gas leaking from the energy conversion device into the installation space by supplying the dilution gas and discharging the gas from the installation space.

Combustible gas is a gas that exists as a gas at normal temperature and pressure and can be combined with oxygen and burned relatively easily. Specifically, it refers to hydrogen, methane, propane, natural gas, and so on. The energy conversion device includes a fuel cell that chemically reacts such combustible gas to extract electric energy (including reformers for supplying the fuel cell with combustible gas, fuel cell stacks and assemblies), This includes internal combustion engines that extract kinetic energy by burning combustible gases, such as hydrogen engines and compressed natural gas (CNG) engines, and fuel gas piping and valve devices used in fuel cells and internal combustion engines. In addition to stationary devices, devices equipped with energy conversion devices include mobile objects such as vehicles, ships, aircraft, movable mouth pots, and portable electronic devices. —Temporary placement refers to placement for a limited period of time, such as 1 hour, 1 day, 1 week, or 1 month, rather than permanent placement. However, the end period need not be final. In the placement facility, the process of placing and removing the energy conversion device or its mounting device in the placement space will be repeated many times.

In the parking facility according to the present invention, in the above-described arrangement facility, the arrangement space is a space in which a fuel cell vehicle equipped with a fuel cell as an energy conversion device is temporarily stored or parked. Examples of parking facilities include a personal garage where one or a few fuel cell vehicles can be parked, a large number of fuel cell vehicles (eg, 10 or more, 1 for large scale vehicles) For example, an underground parking lot or a multilevel parking lot that can park 0 or more vehicles.

In addition, the handling work facility of the present invention is the above-described placement facility, wherein the placement space is energized. This is a work booth where the handling work for the gear conversion device or the device equipped with this energy conversion device is performed. In the following, the components and modifications will be described with the arrangement work facility in mind, but these descriptions can be applied to the above-mentioned placement facility or the parking facility as well. is there.

The handling of equipment refers to the work of conducting experiments on equipment and manufacturing, checking, and maintaining equipment. Booth is also used as a term that refers to a space partitioned from the surrounding by a partition wall. Therefore, a work booth refers to a work space that is partitioned from an external space by a partition wall in order to carry out handling work, in other words, a work room for handling work. The partition wall constitutes a boundary for separating the work space inside the work booth from the external space. The bulkhead includes a side surface arranged vertically or diagonally, and a ceiling surface or floor surface arranged diagonally or horizontally. The partition wall does not necessarily have to seal the work space, and may be provided with a hole portion such as a vent for realizing natural ventilation.

The supply / discharge mechanism is a mechanism that forcibly ventilates the work booth by using mechanical force such as a fan or discharging compressed gas stored in a cylinder. The forced process may be supply only, discharge only, or both supply and discharge. As the dilution gas, for example, incombustible gas / inert gas such as nitrogen or helium, or air can be used. .

According to this configuration, it is possible to realize a handling work facility (inspection and maintenance facility, manufacturing facility, experimental facility, etc.) that quickly dilutes the combustible gas leaked from the energy conversion device to the work booth and discharges it to the outside. Become. Therefore, even if a gas leak occurs, the safety in the work booth is sufficiently secured. In addition, this technology can be implemented by introducing a supply / exhaust mechanism to equipment as shown in Patent Document 1 above, and has the advantage that it can be introduced simply and at low cost.

In one aspect of the handling work facility of the present invention, the combustible gas is lighter than the dilution gas, and the supply / discharge mechanism is supplied from the lower part of the work booth (for example, below the position where the energy conversion device is disposed).・ Drain from the top of the work booth. In this case, the combustible gas rises in the dilution gas due to convection due to the density difference. Therefore, it is more preferable not to reverse the flow direction by natural convection. The gas flow was set from bottom to top. Discharging from the top of the work bus typically refers to discharging from the ceiling of the bulkhead. Moreover, the supply from the lower side of the arrangement position of the energy conversion device is performed by, for example, supplying from the floor surface. In this configuration, if the dilution gas is different from the gas that fills the work booth during normal work (usually air), the combustible gas may be lighter than the gas that fills the work booth. This is particularly desirable for quick discharge. If the diluted gas (and the gas that fills the work booth during normal work) is lighter than the combustible gas, the supply / discharge mechanism will supply from above the position where the energy conversion device is located. It can be set to discharge from the bottom (floor, etc.). In one aspect of the handling work facility of the present invention, a combustible gas sensor for detecting combustible gas leaked to the work booth, a control device for controlling supply or discharge in the supply / discharge mechanism based on the detection result of the combustible gas sensor, Is provided. A combustible gas sensor is a sensor that detects the presence or concentration of a combustible gas. It is desirable to install the combustible gas sensor on the side where the combustible gas can easily flow, and it is desirable to install it near the point where the gas tends to condense (is likely to accumulate). For example, when the combustible gas is lighter than the surrounding gas, when the dilution gas flow by the supply / exhaust mechanism is slow or slow, the upper part of the work booth (even in the work booth, it was drawn from the work booth. It may be provided in the exhaust path). It is also effective to devise measures to prevent detection leaks by reducing the gas flow path or stirring the gas with a fan or the like in the vicinity where the combustible gas sensor is installed. Providing multiple fuel gas sensors is also effective in increasing the detectability.

In one aspect of the handling work facility of the present invention, the control device starts the supply / discharge mechanism when combustible gas satisfying the setting condition is detected. In other words, the supply / discharge mechanism is not normally operated, but when the fuel gas is detected (above the set value), the supply / discharge mechanism is operated so that the gas is discharged quickly. This configuration is effective in realizing a quiet environment if energy is saved. In addition, even when handling work for equipment that does not use combustible gas and handling work for equipment that uses combustible gas coexist, this configuration that operates the supply / discharge mechanism only when necessary functions effectively. .

In one aspect of the handling work facility according to the present invention, the work booth has an upper portion or a lower portion. An inclined surface structure that accumulates combustible gas that rises or falls due to a density difference from the gas filled in the work booth during normal work is provided, and the combustible gas sensor detects the accumulated combustible gas. An inclined surface structure refers to a structure having an inclined surface for inducing and accumulating convective combustible gas. The inclined surface structure may be formed using a partition wall or a floor surface, or may be formed separately from these. The shape of the inclined surface is not particularly limited, but if it has a two-dimensional bend like a funnel, it will be possible to control the horizontal movement to one point, and the degree of condensation of combustible gas will increase. The concentrated fuel gas may be discharged using the supply / discharge mechanism, but natural convection is not performed without using the supply / discharge mechanism (for example, by simply providing an upper or lower discharge port). It may be discharged using it.

In one aspect of the handling work facility of the present invention, the control device increases the amount of supply and discharge by the supply / discharge mechanism when combustible gas satisfying the setting condition is detected. That is, increase the ventilation if fuel gas is detected (above the set value). Switching to increase can be done in one step, or in multiple steps or infinite steps depending on the amount of gas.

In one aspect of the handling work facility according to the present invention, the supply / discharge mechanism includes a plurality of supply ports provided at different positions or a plurality of discharge ports provided at different positions, and the control device is set When combustible gas satisfying the condition is detected, the combination of the supply port or discharge port to be operated is changed among the plurality of supply ports or discharge ports. Typically, if combustible gas is detected (above the set value), increase the number of supply or discharge ports. This makes it possible to increase the amount of gas flow and change the direction of gas flow, thereby promoting ventilation. As an example of changing the direction, the flow set in the vertical direction by normally supplying and discharging between the floor and ceiling of the work booth is horizontal by supplying and discharging between the opposite sides of the work booth. The aspect changed to a direction can be mentioned. In addition, when the handling facility is huge, the pattern of the supply port or outlet to be operated is changed so as to increase the ventilation efficiency in the detection target range of the sensor that satisfies the set condition among the multiple installed sensors. Examples of embodiments to be performed are also included.

In one aspect of the handling work facility of the present invention, the supply / discharge mechanism discharges from the work booth. The control device is provided with a circulation path for supplying at least a part of the gas again to the work booth, and the control device suppresses or stops the gas circulation when combustible gas satisfying the set condition is detected. In other words, if combustible gas is not detected (over the set value), at least a part of the gas is circulated (after removing the combustible gas if necessary). However, if combustible gas is detected (above the set value), the dilution effect will be increased by reducing the amount of circulation or setting it to 0 and letting in a new dilution gas.

In one aspect of the handling work facility of the present invention, the work booth is inspected and maintained for a vehicle equipped with an energy conversion device.

The ventilation device of the present invention is a device provided with the above-described supply / exhaust mechanism, and is provided in the above-mentioned arrangement facility, the above-mentioned parking lot facility, or the above-mentioned handling work facility. The ventilator may be formed as a system in which multiple components are separately attached to these facilities. When the supply / exhaust mechanism is controlled by the control device, the ventilation device includes the control device.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a schematic configuration of a vehicle maintenance facility according to the present embodiment. FIG. 2 is a diagram showing an example of a control mode in the vehicle maintenance facility of FIG.

FIG. 3A is a diagram showing a ventilation mode of the vehicle maintenance facility according to the modification.

FIG. 3B is a diagram showing a ventilation mode of the vehicle maintenance facility according to the modification.

FIG. 4 is a schematic diagram showing a schematic configuration of a vehicle maintenance facility according to another modification.

[Best Mode for Carrying Out the Invention]

Hereinafter, representative embodiments of the present invention will be described. In the description, an example is given of a facility that maintains a vehicle equipped with a fuel cell that uses hydrogen (and oxygen in the air) as fuel. Here, hydrogen is a combustible gas, and a fuel cell is an energy conversion device that extracts electrical energy through a chemical reaction of hydrogen. However, it will be apparent that the present invention is applicable to other combustible gases as well as to energy conversion devices such as internal combustion engines. Inspection and maintenance facilities (equipment) It will be clear that this method can be applied to experimental facilities (equipment) and manufacturing facilities (equipment).

FIG. 1 is a schematic diagram showing a schematic configuration of the vehicle maintenance facility 10 according to the present embodiment. The vehicle maintenance facility 10 mainly includes a vehicle maintenance booth 20, an intake device 30, an exhaust device 40, a duct 50, a hydrogen sensor 80, and a control device 9 Q.

The vehicle maintenance booth 20 is a work booth having a rectangular parallelepiped shape, in which maintenance inspection work is performed on the maintenance vehicle 110 set at the work position. The work space 22 inside the vehicle maintenance booth 20 is surrounded by a side wall 24 and a ceiling wall 26 as partitions. In addition, there are many fine ventilation openings on the floor 28. '

The air intake device 30 is a device provided beside the vehicle maintenance booth 20, and supplies air to the vehicle maintenance booth 20 by a built-in fan 32. Further, the exhaust device 40 is a device composed of exhaust parts 4 2, 4 4, 4 6 attached to the upper side of the ceiling wall 26 of the vehicle maintenance booth 20. The exhaust sections 4 2, 4 4 and 4 6 are each provided with an exhaust port and a fan, and exhaust the hydrogen leaked from the maintenance vehicle 110 with the air.

The duct 50 forms an air flow path outside the vehicle maintenance booth 20. The duct 50 includes an exhaust duct 52, a discharge port 54, a circulation duct 56, an intake port 58, and a supply duct 60. The exhaust duct 52 has one end connected to the exhaust device 40 and the other end connected to the discharge port 54, and guides the air exhausted from the vehicle maintenance booth 20 to the outside. . In addition, the circulation duct 56 is connected at one end to the middle part of the exhaust duct 52 and connected at the other end to the intake device 30 so as to form a path for supplying the exhausted air again. ing. An intake port 5 8 is provided in the middle of the circulation duct 5 6. When air from the intake port 58 instead of the exhaust data 52 is sent to the intake device 30, new air is supplied to the vehicle maintenance booth 20. The supply duct 60 is connected at one end to the air intake device 30 and guides air under the floor surface 28 of the vehicle maintenance booth 2◦. As mentioned above, there are many fine vents on the floor 28. Air is supplied from the supply duct 60 to the vehicle maintenance booth 20 through this ventilation opening.

In the duct 50, dampers 70, 72, 74 are provided as movable plates for controlling the air flow. The damper 70 is provided in the exhaust duct 52 between the branch to the circulation duct 56 and the discharge port 54, and adjusts the circulation amount and the discharge amount to the outside. The damper 7 2 is provided in the circulation duct 56 between the branch from the exhaust duct 52 and the intake port 58, and adjusts the circulation amount. The damper 7 4 is provided at the intake port 5 8 and adjusts the intake amount of new air. The dampers 70, 7 2, and 7 4 together with the intake device 30, the exhaust device 40, and the duct 50 form a supply / exhaust mechanism for realizing the ventilation of the work booth 20. .

The hydrogen sensor 80 is a gas sensor installed in the exhaust duct 52, and can detect the amount of hydrogen.

The control device 90 is a computer device for controlling the air conditioning of the vehicle maintenance facility 10. This device can be formed by defining the operation of hardware such as PC (Personal Computer) and microcomputers that have operation and storage functions by software (program). The control device 90 includes an input / output unit 92, a comparison unit 94, and a threshold table 96. The input / output unit 9 2 acquires the output data of the hydrogen sensor 80 and sends it to the comparison unit 94, and in accordance with instructions from the comparison unit 94, the fan 3 2, the exhaust device 40, the exhaust device 40, And the operation command signal is sent to dampers 70, 72, 74. Further, when the comparison unit 94 acquires the hydrogen detection amount from the input / output unit 92, the comparison unit 94 refers to the threshold value table 96 to determine an optimal control state. Then, it instructs the input / output unit 92 to transmit a control signal so as to realize the determined control state.

Next, the operation of the vehicle maintenance facility 10 will be described with reference to FIG. 1 and FIG. FIG. 2 is a diagram showing the vehicle maintenance facility 10 in the same manner as FIG. 1, and the same components are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 1, in a vehicle maintenance booth 20, a maintenance vehicle 1 1 0 equipped with a fuel cell is brought into a work space 22 inside of the vehicle maintenance booth 20 and set at a work position. Product The contractor performs various types of maintenance and inspection work using equipment and tools (not shown) provided in the work space 22.

The operator operates the control device 90 to activate the air conditioning system in the vehicle maintenance booth 20 at least when performing work related to the fuel cell. That is, the intake device 30 and the exhaust device 40 are set to ON, and a small amount of air flows in the work space 22 from the floor surface 28 toward the ceiling wall 26 side. At this time, the damper 70 is set to be slightly open, and about 10% of the exhausted air is discharged to the outside. Damper 7 2 is also kept fully open and keeps a smooth circulation flow. The damper 74 is set to be slightly open, and about 10% of outside air is taken from the intake port 58 so as to compensate for the air discharged by the damper 70. As a result, about δ% of the air flowing into the work space 22 is re-aired, and about 10% is newly taken-in air.

Hydrogen gas may leak out in the process of maintenance of the maintenance vehicle 1 1 0 by an operator. The leaked hydrogen gas rises quickly due to its low density. In some cases, hydrogen gas can collect in the hollows of the vehicle, but most of it is quickly pushed out by the air flow. Then, the hydrogen gas that has reached the top of the work space 22 enters the exhaust duct 52 from the exhaust device 40 along the entire flow of air. In this way, hydrogen is diluted in the vehicle maintenance booth 20 by natural convection and ventilation.

In the exhaust duct 52, the hydrogen sensor 80 detects the amount of hydrogen gas at a fine sampling interval (for example, 1 second). In general, the flow is turbulent in the exhaust duct 52 due to the influence of the fan of the exhaust device 40, and the hydrogen sensor 80 is able to distribute the air flowing from the exhaust parts 42, 44, 46 evenly. Can be subject to inspection. And the hydrogen mixed in it is detected without leakage.

In the control device 90, the comparison unit 94 compares the amount of hydrogen detected by the hydrogen sensor 80 with a preset threshold value table 96 to determine the state of the air conditioning operation to be performed. For example, when the detected amount of hydrogen is 0 or in a very small range, as described above, 90% of air is circulated. As a result, even when heating or cooling is in effect, the efficiency is not reduced so much and it is reasonably fresh. Air can be introduced.

Here, it is assumed that a relatively large amount of hydrogen gas has leaked. In this case, the hydrogen sensor 80 detects this relatively large amount of hydrogen and outputs it to the controller 90. Then, the comparison unit 94 refers to the threshold value table 96 and determines that the next stage of air conditioning needs to be performed for the detected amount of hydrogen.

FIG. 2 is a diagram showing an example of air conditioning in this case. In this operation, the amount of air blown by the intake device 30 and the exhaust device 40 is not changed, but the feature is that the air circulation is stopped. That is, the damper 70 is completely opened, and smoothly guides the air from the exhaust duct 52 to the outlet 54. Also, damper 7 2 is closed, preventing air circulation. The damper 7 4 is fully released, allowing sufficient air intake from the intake.

As a result, the leaked hydrogen is quickly discharged to the outside through the outlet 54. Therefore, the hydrogen concentration at the vehicle maintenance booth 20 is kept sufficiently low to ensure safety. If a larger amount of hydrogen is detected, the operating levels of the intake device 30 and the exhaust device 40 are increased while maintaining the dampers 70, 72, 74 in the state shown in FIG. be able to. This makes it possible to quickly expel hydrogen to the outside and dilute hydrogen.

Subsequently, a modification will be described with reference to FIGS. 3A and 3B. FIGS. 3A and 3B are schematic views showing the vehicle maintenance booth 20 shown in FIG. 2 from the side of the maintenance vehicle 110. FIG. Fig. 3A shows air conditioning under normal conditions, and Fig. 3B shows air conditioning when hydrogen is detected above the set conditions.

The ventilation state in FIG. 3A is the same as that described in FIG. That is, air flows from the inlets 1 2 0, 1 2 2, 1 2 4 provided on the floor to the exhaust ports 1 3 0, 1 3 2, 1 3 4 provided on the ceiling wall A small amount of hydrogen gas is discharged.

When a large amount of hydrogen is detected, it is necessary to quickly release the hydrogen to the outside. In Fig. 3B, a large amount of air is blown from the front to the rear of the vehicle maintenance booth 20 in order to implement this discharge promptly. In other words, instead of stopping the blowing from the bottom to the top, which was performed in the normal state, it was installed on the wall in front of the vehicle maintenance booth 20. Opened intake ports 1 4 0, 1 4 2 and exhaust ports 1 5 0, 1 5 2 provided on the rear wall surface are opened, and a large fan pushes air to the outside at once. The upper intake port 140 and the upper exhaust port 150 are provided in the vicinity of the ceiling wall, and are set so as to be sufficiently discharged even when hydrogen accumulates near the ceiling wall by convection. In this way, when a large amount of hydrogen is detected, not only the amount of air blown but also the direction of air blowing is changed to realize efficient discharge, thereby further ensuring safety. It is also effective to use an inert gas (non-combustible gas) such as nitrogen or helium instead of air when workers do not enter the vehicle maintenance booth 20. In other words, it has a function of flowing an inert gas instead of air as a dilution gas, or a function of mixing an inert gas into the air, and a function of flowing air and an inert gas at least by changing the ratio as a dilution gas. 'When the combustible gas satisfying the setting condition is detected, the ratio of the inert gas in the dilution gas may be increased, or the dilution gas may be changed to only the inert gas. This configuration has room for implementation even when workers enter. For example, by injecting helium gas from a position higher than the worker's height, the worker's breathing is ensured and the lightest hydrogen accumulated near the ceiling is wrapped in light helium gas and separated from the air. Is possible.

Finally, another modification will be described with reference to FIG. 4 is almost the same as FIG. 1, and the same components are denoted by the same reference numerals and the description thereof is omitted. The major difference between Fig. 4 and Fig. 1 is that a vehicle maintenance booth 1 5 8 formed by tilting the ceiling wall 160 is introduced. The ceiling wall 160 is set so that the height of the ceiling increases toward the center. And, from the apex position of the ceiling wall 160, the narrow tube 16 2 is installed upward. In addition, a hydrogen sensor 1 6 4 is attached inside the narrow tube 1 6 2.

Further, an exhaust device 170 is attached to the inside of the ceiling wall 160. The exhaust device 1 70 includes exhaust units 1 7 2, 1 7 4, 1 7 6, and 1 7 8, each of which has an exhaust port and a fan.

Next, the operation according to the configuration shown in FIG. 4 will be described. Here, ventilation is not performed when the amount of hydrogen leakage is zero or very small. But hydrogen leak When this occurs, hydrogen rises by natural convection, and is then guided to the narrow tube 16 2 along the slope of the ceiling wall 160 and can escape to the outside. Therefore, even if there is some hydrogen leakage, the vehicle maintenance booth 15 8 can be kept sufficiently safe without blowing.

— On the other hand, in the narrow tube 1 6 2, the hydrogen sensor 1 6 4 detects the amount of hydrogen at fine sampling intervals. Then, the detection result is transmitted to the control device 90, and control based on the threshold table 96 is performed. That is, if a hydrogen amount exceeding the threshold is detected, the intake device 30 and exhaust device 170 are activated and the dampers 70, 72, and 74 are adjusted; To the outside.

Claims

The scope of the claims

1. An energy conversion device that is covered with a partition wall and uses combustible gas as fuel, or an installation space in which this energy conversion device is temporarily installed, and a dilution gas is supplied to the arrangement space And a forced supply / exhaust mechanism that dilutes the combustible gas leaked from the energy conversion device into the placement space by discharging the gas from the placement space,

An arrangement facility characterized by comprising:

2. In the arrangement facility according to claim 1,

Combustible gas is a lighter gas than diluent gas, and the arrangement facility is characterized in that the supply / discharge mechanism supplies from the lower part of the arrangement space and discharges from the upper part of the arrangement space.

3. In the placement facility according to claim 1,

A combustible gas sensor for detecting the combustible gas leaking into the arrangement space;

Based on the detection result of the combustible gas sensor, a control device for controlling supply or discharge in the supply / discharge mechanism,

An arrangement facility characterized by comprising:

4. In the placement facility according to claim 3,

An arrangement facility characterized in that the control device starts the supply / exhaust mechanism when combustible gas satisfying the set condition is detected.

5. In the arrangement facility according to claim 4,

The upper or lower part of the arrangement space is provided with an inclined surface structure that accumulates the combustible gas that rises or falls due to the density difference from the gas that normally fills the arrangement space, and the combustible gas sensor is integrated with the combustible gas sensor. Arrangement characterized by detecting gas Zt

P Su.

6. In the arrangement facility according to claim 3,

The control facility is configured to increase the amount of supply and discharge by the supply / discharge mechanism when combustible gas satisfying the setting condition is detected.

7. In the arrangement facility according to claim 3,

The supply / discharge mechanism includes a plurality of supply ports provided at different positions, or a plurality of discharge ports provided at different positions,

The control facility is configured to change a combination of a supply port or a discharge port to be operated among the plurality of supply ports or discharge ports when a combustible gas satisfying a set condition is detected.

8. In the arrangement facility according to claim 3,

The supply / discharge mechanism includes a circulation path for supplying at least part of the gas discharged from the arrangement space to the arrangement space again,

The control facility is an arrangement facility characterized by suppressing or stopping gas circulation when combustible gas satisfying a set condition is detected. '

9. In the arrangement facility according to claim 1,

An arrangement facility characterized in that in the arrangement space, inspection and maintenance of vehicles equipped with an energy conversion device are performed.

1 0. In the arrangement facility according to claim 1,

The parking space facility is characterized in that the placement space is a space where a fuel cell vehicle equipped with a fuel cell as an energy conversion device is temporarily stored or parked.

1 1. In the placement facility according to claim 1,

The arrangement space is a handling work facility characterized in that it is a work booth in which handling work is performed on the energy conversion device or a device equipped with this energy conversion device.

1 2. A device that ventilates an energy conversion device that is covered with a partition wall and that uses combustible gas as a fuel, or a placement space in which a device equipped with this energy conversion device is temporarily placed. And

A dilution gas is supplied to the arrangement space, and a forced supply / exhaust mechanism is provided to dilute the combustible gas leaked from the energy conversion device into the arrangement space by discharging the gas from the arrangement space. Ventilation device.