JPH0542720Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a fuel tank room ventilation structure for a small personal watercraft.

(Prior art) The hull is shorter than that of conventional small personal watercraft, and the overall shape is box-shaped. In addition to improving the rigidity of the hull, it is filled with a filler made of synthetic resin foam to provide buoyancy, and an engine room is installed inside the cabin located approximately in the center of the hull. defines a fuel tank room, provides a driver's seat above the engine room, and
A small planing boat has been proposed in which a rear seat is provided above the fuel tank room, and the driver maneuvers the boat by tilting a control stick provided in front of the seat left and right to change the angle of the jet propulsion nozzle around the vertical axis. .

In this type of small personal watercraft, the engine room and fuel tank room generally each have their own ventilation means that communicate with the outside world (outside) for ventilation.

For example, for ventilation in the engine room, an intake port is opened at the top of one side, and an exhaust port is opened at the top of the other side or at the stern, allowing ventilation to flow from the intake port through the engine room to the exhaust port. For ventilation inside the fuel tank room, create a passageway inside the filling material between the decks on both sides and the hull, or open an intake port on the front wall that forms the fuel tank room, and keep the exhaust port as far away from the intake port as possible. There are some configurations in which the fuel tank room is opened in a gap between the rear seat and the rear side wall or upper wall that forms the fuel tank room. As a prior art, there is a device proposed by the present applicant in Utility Application No. 152322/1980 (see Japanese Unexamined Utility Model Application No. 56397/1997).

(Problem to be solved by the invention) By the way, in the configuration in which the intake and exhaust ports for ventilation in the fuel tank room are provided on the wall forming the fuel tank room, as described above, they are provided as part of the hull. It will be necessary to modify the wall of the fuel tank room.

This idea was devised in view of the above points, and included a ventilation hole in the bottom plate of the rear seat that also serves as the top cover of the fuel tank room, and a ventilation fan installed in the electrical equipment room adjacent to the fuel tank room. To provide a fuel tank room ventilation structure in which the engine room and the fuel tank room are forcedly ventilated by sharing the same space.

(Means for Solving the Problems) The gist of this invention to achieve the above purpose is to provide a small personal watercraft with a wide and shallow box-shaped hull and a fuel tank room inside the cabin under the rear seats. , an electrical equipment room is provided adjacent to the fuel tank room, a ventilation fan for forced ventilation of the engine room is installed in the electrical equipment room, and a ventilation fan is installed on the front and rear surfaces of the rear seat bottom plate that also serves as the top cover of the fuel tank room. A ventilation hole was opened, and a forced ventilation hole equipped with a check valve mechanism that only allowed ventilation from the fuel tank room side was installed in the partition wall between the fuel tank room and the electrical equipment room. This is in the fuel tank room ventilation structure of a small personal watercraft.

(Function) According to this invention configured as described above, the ventilation passage of the engine room extends to the electrical equipment room adjacent to the fuel tank room, and the partition wall between the fuel tank room and the electrical equipment room is connected to the fuel tank room. A forced ventilation hole with a check valve mechanism that only allows ventilation from the side has been opened, so the ventilation fan installed in the electrical equipment room performs forced ventilation in the engine compartment, and the electrical equipment The depressurizing action in the room extends to the fuel tank room through the forced ventilation hole, and the fuel tank room is also forcibly ventilated.

When the ventilation fan stops operating, the forced ventilation hole is closed by the check valve mechanism, the fuel tank room, electrical equipment room, and engine room are blocked off, and the fuel tank room is closed for ventilation. Outdoor air flows in through the holes to provide natural ventilation.

(Example) Hereinafter, an example of this invention will be described based on the drawings.

FIG. 1 is a schematic sectional view of a small personal watercraft to which this invention is applied.

In the figure, reference numeral 1 indicates the hull of a small personal watercraft, which has a wide and shallow box-like overall shape. This is a well-known structure in which the hull 1 is filled with a filler made of a resin foam material or the like to improve the rigidity of the hull 1 and to exhibit buoyancy.

Reference numeral 5 denotes a fuel tank room located and defined at the rear of the cabin 2. A rear seat 6 is provided on the fuel tank room 5, and its bottom plate 7 also serves as an upper lid of the fuel tank room 5.

Reference numerals 8 and 9 denote ventilation holes provided on the front and rear surfaces of the bottom plate 7. When the rear seat 6 is placed over the fuel tank room 5, the fuel tank room can be accessed through both ventilation holes 8 and 9. The inside of 5 is connected to the outside world.

10 is an engine room defined in the cabin 2, and from this engine room 10 there is a ventilation passage 11.
(See Figure 2) extends to the stern.

As shown in FIG. 2, this ventilation passage 11 connects to an electrical equipment room 12, which is defined adjacent to the fuel tank room 5 under the rear seat 6 and in which electrical equipment such as batteries is installed. A ventilation fan 13 for forced ventilation is installed in the electrical equipment room 12.

Reference numeral 14 denotes a partition wall between the fuel tank room 5 and the electrical equipment room 12 adjacent thereto.A forced ventilation hole 15 is provided in this partition wall 14. It is equipped with a check valve mechanism 16 that allows ventilation only from the side.

In addition, ventilation fan 1 consisting of Sirotskov fan etc.
3 is provided with a through hole 17 that communicates with the interior of the electrical component room 12 so that the pressure inside the electrical component room 12, which is sealed, can be reduced.

In addition, 18 in FIG. 1 is a driver's seat provided on the engine room 10, and 19 is this driver's seat 1.
This is the control stick located in front of the 0.

In the above configuration, forced ventilation is performed in the engine room 10 by operating the ventilation fan 13, while the check valve mechanism 16 is depressurized in the electrical equipment room 12.
opens the forced ventilation hole 15, and the suction action extends into the fuel tank room 5 through the forced ventilation hole 15, and the outside air is actively drawn through the ventilation holes 8 and 9 formed in the rear seat bottom plate 7. The inside of the fuel tank room 5 is also forcibly ventilated.

When the operation of the ventilation fan 13 is stopped, the forced ventilation hole 15 provided in the partition wall 14 between the fuel tank room 5 and the electrical equipment room 12 is closed by the check valve mechanism 16, and the fuel tank The fuel tank room, electrical equipment room, and engine room are separated from each other in terms of atmosphere, and natural ventilation is achieved by freely flowing outside air into the fuel tank room through ventilation holes.

(Effects) As described above, this invention provides the following effects.

(1) Ventilation holes in the fuel tank room were created in the bottom plate of the rear seat, which also serves as the top cover of the fuel tank room, so there is no need to modify the wall that defines the fuel tank room, which is part of the hull. It has excellent workability and reduces manufacturing costs.

(2) A ventilation fan is installed in the electrical equipment room that relays the ventilation passage in the engine room that extends to the stern, and a forced ventilation passage with a check valve mechanism is installed in the partition wall between the fuel tank room and the electrical equipment room. Since the hole has been opened, when the ventilation fan is activated, part of the power of the ventilation fan is used to forcefully ventilate the inside of the fuel tank room, expanding the range of use of the ventilation fan.

(3) When the ventilation fan is not operating, the forced ventilation hole in the partition wall between the fuel tank room and electrical equipment room is closed by a check valve mechanism, and the fuel tank room, electrical equipment room, and engine room are closed. Since ventilation is blocked off and the atmosphere is cut off, the inside of the fuel tank room is communicated with the outside world only through ventilation holes in the bottom plate of the rear seat, allowing outside air to flow in freely and providing natural ventilation. ,
The fuel tank room has excellent ventilation.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view of a small personal watercraft to which this invention is applied, and FIG. 2 is a partially cutaway perspective view of the main parts of this invention. 1...Hull, 2...Cabin, 3...Deck,
4... Hull, 5... Fuel tank room, 6... Rear seat, 7... Rear seat bottom plate, 8, 9... Ventilation holes, 10... Engine room, 11... Ventilation passage, 12... Electrical equipment room, 13... Ventilation fan, 14... Partition wall, 15... Forced ventilation hole,
16...Check valve mechanism, 17...Through hole.

Claims (1)

[Scope of utility model registration request] In a small personal watercraft with a wide, shallow, box-shaped hull and a fuel tank room under the rear seats in the cabin, an electrical equipment room is provided adjacent to the fuel tank room, and forced ventilation of the engine room is provided in the electrical equipment room. Ventilation holes were installed on the front and rear surfaces of the rear seat bottom plate, which also serves as the top cover of the fuel tank room, and a ventilation hole was installed on the partition wall between the fuel tank room and the electrical equipment room. A fuel tank room ventilation structure for a small personal watercraft characterized by having a forced ventilation hole equipped with a check valve mechanism that allows only ventilation.