VESSEL PROVIDED WITH AN IMPROVED AIR CIRCULATION SYSTEM

A vessel having an air circulation system allowing better exploitation of the spaces inside the vessel is provided. The flanks of the hull of the vessel are used for accommodating at least part of the components of the air circulation system to free up useful space on decks, in order to use it for other purposes. Porthole frames are used for making air ports for the ventilation and air conditioning system to simplify the design of the system and not to deteriorate the outer appearance of the hull.

TECHNICAL FIELD

The present invention relates to a vessel provided with an air circulation system.

More particularly, the present invention relates to a vessel provided with an air circulation system allowing the best possible use of space inside the vessel.

Said ventilation system can advantageously be used for the air circulation in the engine room of the vessel, and particularly for the ventilation of the engine room, but also for the air circulation in other rooms, such as, for example, the rooms of the vessel that are intended for passengers' use.

In addition, said air circulation system can also be used for extracting air from rooms of the vessel, for example for extracting hot air from the engine room, and/or for air conditioning of rooms of the vessels, such as, for example, those that are intended for passengers' use.

BACKGROUND ART

Referring also toFIGS.1-3, in the state of the art, vessels100are known comprising a hull102and a main deck104on which a superstructure106is provided capable of housing, for example, the helm station of the vessel.

Inside the hull102, the space is divided in one or more overlying decks108,110, which accommodate other rooms, the intended use of which will depend on the kind of vessel, and further accommodate the rooms for the crew, the engine room, rooms for the storage and conservation of materials, and so on.

FIGS.1-3illustrate, by way of example, a pleasure craft100and the decks108,110will partially be used as areas available for passengers (so-called “noble areas”).

More in detail,FIG.1shows a pleasure craft100comprising, below the main deck104, a middle deck108(usually referred to as “lower deck” in the technical field of reference) and a lowermost deck (usually referred to as “underlower deck” in the technical field of reference): the “lower deck”108, located immediately below the main deck, may accommodate—among others—rooms for passengers' and crew's use, whereas the “underlower deck”110, located immediately above the keel of the hull, usually accommodates the engine room, storage rooms and the like.

In general, in pleasure crafts of the known type, the engine room usually extends upwards beyond the underlower deck110and up to the main deck, thus partially occupying also the “lower deck”108and taking space from the passengers' rooms.

Since the engine room is located at the lowermost deck of the vessel, in a closed environment, proper ventilation of the machinery contained therein is of utmost importance and cannot but take place by means of a forced ventilation system.

For this reason, vessels must necessarily be equipped with an appropriate ventilation system for the engine room.

Preferably, vessels are also provided with a system for extracting air from the engine room, in order to extract hot air from the engine room, so as to subtract heat and help to keep the temperature of the machinery contained therein limited.

In addition to a ventilation system for the engine room, the vessel may further be provided—depending on its intended use—with further ventilation systems for other rooms, or also with air conditioning systems. This is the case, for example, with passenger vessels, in which the rooms available for the passengers are provided with an air conditioning system. However, ventilation, air extraction and air conditioning systems commonly used according to prior art have remarkable drawbacks.

In particular, as clearly shown inFIGS.2and3, in the making of an air circulation system200, it is necessary to provide rooms intended for housing the blowers and promoting forced air circulation, as well as an arrangement of air ducts202,204carrying air into the different rooms to be ventilated or conditioned through the different decks of the vessel.

As can be seen inFIG.2, according to prior art, blowers are provided at both sides of the hull, each blower having its own arrangement of ducts202,204.

As can be seen inFIG.1, each arrangement of ducts202comprises an air port206, which is normally formed above the level of the main deck104.

For example, said air port can be formed in a corresponding funnel extending upwards from the main deck (in this respect see, for example, document KR 101654595, especially with reference to the funnel indicated with130).

Correspondingly, the relative arrangements of ducts202,204as well as the rooms intended for housing the blowers are formed at the noble areas provided on said decks, thus taking useful space from the rooms intended for passengers.

Even in case of vessels intended for a use other than the transport of passengers, the air circuits of air circulation systems take remarkable space that could more profitably be put to other uses.

In other words, if the aforementioned drawback is particularly felt with pleasure crafts, where a strong need is felt to guarantee comfortable cabins and large leisure, recreational spaces for the passengers, it is also present in vessels of other kinds: irrespective of the final destination thereof, because of the limited overall space available, optimization in managing the rooms is one of the key points when designing any kind of vessel.

Furthermore, the operation of the air circulation system200generates some noise, whereby it is necessary to provide for the acoustic insulation of said system, especially in vessels for transporting passengers.

The object of the present invention is therefore to overcome the drawbacks of prior art, by providing a vessel having an air circulation system that allows eliminating, or at least drastically limiting, the space occupied on the decks of the vessel itself and thus taken from other uses.

Another object of the present invention is to provide a vessel equipped with an air circulation system that allows eliminating, or at least reducing, the need to provide dedicated apparatuses for acoustic insulation.

These and other objects are achieved with a vessel as claimed in the appended claims.

SUMMARY OF INVENTION

The invention provides for moving the components of the air circulation system towards the flanks of the vessel, so as to free up useful space on the decks, in order to use it for other purposes.

In particular, the invention provides for using the structure of the vessel hull for housing the ducts of the air circulation system.

In this way, it will be possible for the blowers of said air circulation system to be accommodated on the lowermost deck of the vessel, near the flanks of the vessel itself, and the air ducts will develop inside the hull of the vessel, between each of said blowers and a corresponding air port provided on the flank of the vessel.

Preferably, said air ducts will develop entirely inside the hull of the vessel between each of said blowers and a corresponding air port provided on the flank of the vessel.

In this way, the space requirement of the air circulation system at the decks of the vessel will be close to zero.

Even in the case in which the air circulation system is used for ventilating rooms located in central areas of the decks, or for conditioning air in said rooms, the space requirement of said air circulation system is limited to the distribution ducts necessary for reaching the rooms to be ventilated and/or conditioned.

Advantageously, according to the invention, frames of the type usually employed for mounting portholes generally present on the flanks of the vessel are used for making the air ports for the air circulation system.

Real portholes or so-called “fake portholes”, which have a simple glass facing outwards and are closed inwards, can then be mounted inside said frames.

This solution has apparent advantages.

First of all, by using elements which are traditionally already provided on vessels, the designing of the air circulation system will be simplified.

Secondly, by using porthole frames rather than providing dedicated air ports covered by protective grids or the like, the invention can also be implemented in vessels in which the outer appearance of the hull is of great importance, such as, for example, luxury pleasure crafts.

The air circulation system thus conceived can advantageously be used for ventilating the engine room of the vessel.

In this respect, it will be of advantage to provide for arranging the blowers of said air circulation system directly within the engine room.

However, said air circulation system can also be used for extracting hot air from the engine room.

In particular, by providing use of a reversible blower, the direction of the air flow in the circuit of the air circulation system can be reversed as required, so that ventilation of the engine room or air extraction therefrom can be obtained alternatively.

In addition, the air circulation system according to the invention can also be used for the ventilation and/or air conditioning of other rooms of the vessel. For example, in the case of pleasure crafts, it can be used for the air conditioning of the rooms used by passengers.

DESCRIPTION OF EMBODIMENTS

Here below, reference will be made to a pleasure craft10of the type shown inFIGS.4-6.

However, the invention should not be understood as being limited to this type of vessels and can be implemented in any types of vessels.

In general, the invention is applicable to vessels of the type comprising a main deck14and a hull12the interior of which is divided in a plurality of overlying decks18,20.

Referring toFIGS.7and8, there is schematically illustrated a portion of the hull12of a vessel10according to the invention.

The hull12comprises a pair of flanks16a,16b(seeFIGS.5and6) extending from the bow end to the stern end on the opposite sides of the vessel10. Each of said flanks16a,16bcomprises an outer wall, an inner wall and a space sandwiched between said outer wall and said inner wall.

A main deck14, on which a superstructure16is arranged, and one or more decks18,20located below the main deck14and inside the hull12extend between the opposite flanks of the hull12.

More particularly, the space inside the hull is divided in two overlying decks, a “lower deck” (or middle deck)18, which is located immediately below the main deck, and an “underlower deck” (or lowermost deck)20, which is immediately above the keel of the hull12.

In a manner known per se, in the “underlower deck”20there is provided the engine room22, which houses the machinery necessary for propelling the vessel.

It should be noted that, according to the type and size of the vessel10, the engine room22might extend in height beyond the ceiling of the “underlower deck” and occupy part of the overlying deck.

In the ensuing detailed description, reference will be made to the use of the air circulation system according to the invention as a ventilation system for the engine room of the vessel.

However, such reference should not be understood as limiting, and the system according to the invention can also be used as a ventilation system for rooms other than the engine room, as a system for extracting air from the engine room or other room, and also as an air conditioning system.

As mentioned above, proper ventilation of the engine room22is of primary importance for the safety of the vessel, as well as for the performance thereof and the useful life of the machinery contained therein.

Accordingly, the vessel will be equipped with an air circulation system1for ventilating the engine room22.

Generally, said ventilation system1comprises:one or more blowers3arranged to promote forced air circulation;for each of said blowers3, at least one air port, in particular an air inlet port or air intake5;air passage ducts, in particular air supply ducts7, which connect said at least one air intake5to the respective blower3;air distribution ducts (not shown) which carry air from the blower3to the rooms to be ventilated.

According to the invention, said at least one air intake5is located on the outer wall of a flank of the hull12(see alsoFIG.4) and the air supply ducts7develop inside the space sandwiched between the outer wall and the inner wall of said flank of the hull12, between the air intake5and the blower3(see alsoFIGS.5and6).

Preferably, said air supply ducts7develop entirely inside the space sandwiched between the outer wall and the inner wall of said flank of the hull12, between the air intake5and the blower3.

Said blower if preferably located on the lowermost deck of the vessel (in the present case, the “underlower deck”20), and even more preferably inside the engine room22.

Preferably, one or more blower(s)3(and corresponding air intake(s)5) will be provided for each flank of the hull12.

This will advantageously allow limiting the extension of the air distribution ducts for reaching the different rooms to be ventilated.

It should be noted that, as anticipated above, the system according to the invention could be used for the making of a system for extracting air from the engine room.

In this case, the blower(s) will be arranged for sucking air from the engine room, and the air port will be used as an air outlet port or air vent, and the air passage ducts will be used as air discharge ducts.

For example, it would be possible to provide an air circulation system according to the invention operating as a ventilation system for the engine room, on one side of the vessel, and a similar air circulation system according to the invention operating as a system for extracting air from the engine room, on the opposite side of the vessel.

Alternatively, by providing blowers in which the direction of the air flow can be reversed, the same system according to the invention can be used alternately for blowing fresh air into (ventilating) the engine room or for extracting hot air therefrom.

Referring again to the shown embodiment, the air intake5is arranged on the outer wall of the flank of the hull, at a position located below the freeboard deck, which usually coincides with the main deck14.

For this reason, the air supply ducts7will have a first, upwardly oriented branch7a, which extends from the air intake5above the main deck14, inside the bulwark24of the hull12, and a second, downwardly oriented branch7b, which extends from the main deck14to the blower3.

As shown inFIGS.7and8, the first, upwardly oriented branch7aand the second, downwardly oriented branch7bcan be obtained in a same housing7c, on condition that they are divided by a partition7d.

This prevents water coming from the outside through the air intake5from penetrating into the second, downwardly oriented branch7bof the air supply ducts7and reaching, from there, the blower3.

In the embodiment shown inFIGS.7and8, the first, upwardly oriented branch7aand the second, downwardly oriented branch7bare arranged side-by-side and aligned in the longitudinal direction of the hull12.

However, in an alternative embodiment of the invention, the first, upwardly oriented branch7aand the second, downwardly oriented branch7bmight also be arranged side-by-side and aligned in the transverse direction of the hull12.

Advantageously, the invention provides for using porthole frames9for the making of the air intake5.

To this aim, slits11for air entrance are provided on one or more sides—preferably on all sides—of the porthole frame9.

Said slits11might possibly be provided with means for preventing passage of water splashes, allowing only air to penetrate into the air supply ducts7.

Using porthole frames9for the making of air intakes will not allow simplifying the designing of the ventilation system by using already present and available components, but it will also make it possible not to damage the outer appearance of the hull, this being a need felt with passengers' vessels, especially with luxury pleasure crafts.

The porthole frames9used for the making of air intakes should not necessarily be provided with a real porthole. They might also hold a so-called “fake porthole”, comprising a glass on the side of the hull facing outwards and a metal sheet on the side of the hull facing inwards.

With this solution, too, which is remarkably more cost-effective than the use of real portholes, the uniformity of the outer appearance of the hull wall will be homogeneous.

Inside, the metal sheet will then be covered with covering materials used for the rest of the inner wall of the hull.

Turning now toFIGS.9and10, there is shown a second embodiment of the invention. Said second embodiment is substantially similar to the one shown inFIGS.7and8. For this reason, the same reference numerals already used before will be used for identifying identical or similar components, and such components will not be described in detail again. The embodiment ofFIGS.9and10differs from the previously described one in that two different air ports (in the shown embodiment, air intakes)5′,5″, both provided on the outer wall of a flank of the hull, are associated with each blower.

Accordingly, the air supply ducts comprise two upwardly oriented branches7a′,7a″ associated each to a corresponding air intake. Said upwardly oriented branches7a′,7a″ then merge into a common downwardly oriented branch7bleading to the blower3. Both the two upwardly oriented branches7a′,7a″ and the downwardly oriented branch7bdevelop inside the space sandwiched between the outer wall and the inner wall of the flank of the hull. In particular, they develop entirely inside the space sandwiched between the outer wall and the inner wall of the flank of the hull.

In this embodiment, too, the downwardly oriented branch—rather than being arranged side-by-side and aligned with the upwardly oriented branches in the longitudinal direction of the hull, as shown in the Figures—might be arranged side-by-side and aligned with the upwardly oriented branches in the transverse direction of the hull.

It will be apparent to the person skilled in the art that the detailed description above has been provided by way of non-limiting example and that several variations and modifications are possible without thereby departing from the scope of protection as defined in the appended claims.

In particular, although in the embodiments described above reference has been made to the use of the ventilation system for ventilating the engine room, it may also be used for ventilating other rooms, for extracting air from the engine room or other rooms, or also for conditioning air in other rooms.

In particular, a vessel may be provided with several ventilation systems according to the invention, each with its own destination of use. For example, a first ventilation system for ventilating the engine room, a second ventilation system for extracting air from the engine room, a third ventilation system for air conditioning in the areas intended for passengers, a fourth ventilation system for ventilation (or air conditioning) in the crew's rooms, and so on, can be provided.

Furthermore, although in the embodiments shown above reference has sometimes been made to a pleasure craft, the ventilation system according to the invention can be implemented in any kinds of vessels.