Ventilating apparatus for conveyance

Abstract: A ventilating apparatus for a conveyance has first conduits (29, 30) disposed in the upper portion of a vehicle (27) so as to supply conditioned air allowed to flow from an air conditioned device into a compartment, second conduits (46, 47) disposed in the lower portion of the vehicle so as to suck and circulate air in the compartment, and third conduits (51, 52) disposed in the lower portion of the vehicle so as to suck and circulate air in the compartment. Air conditioning means serve to mix air circulated from the second conduits (46, 47) with air sucked from the outside of the compartment by a suction device. A ventilating device (53, 54) includes the suction device and an exhaust device, wherein, in the case where the compartment is partitioned, the ventilating apparatus is individually provided for each partitioned compartment and the third conduits (53, 54) are connected to a discharge port of a lavatory.

Description: BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an apparatus for ventilating a compartment of a conveyance typified by, for example, a railway vehicle. Related Art Statement As a typical conventional technology, there are a ventilating apparatus having relaxation means for changing the ventilation passage connected to an air blower and disclosed in Japanese Patent Laid-Open No. 63-199170, a ventilating apparatus having a Roots fan for sucking/exhausting air and disclosed in Japanese Patent Laid-Open No. 64-18766, and a structure having a plurality of pairs each of which is composed of an air blowing opening and an air suction opening formed in the roof surface and arranged in such a manner that the plurality of the pairs are combined with an exclusive air conditioning apparatus. Then, a typical example of the conventional structures will now be described with reference to Fig. 11 which is a plan view from which a portion is omitted. Referring to Fig. 11, a suction means 2 is disposed in the upper portion of a railway vehicle 1, for example, in a portion between the ceiling and the roof. Outside air introduced by the suction means 2 is branched into two sections after it has passed through an air passage 3. One of the branched air flows is supplied to an air conditioning means 4 via an air passage 3a, while the residual air flow is supplied to another air conditioning means 9 via an air passage 3b. The air conditioning means 4 and 9 are also respectively supplied with circulated air which has flowed through circulation ports 5 and 14 and circulation ports 10 and 15 formed at arbitrary positions of the ceiling via air passages 6 and 16 and air passages 11 and 17. Circulated air and fresh air introduced from the outside of the vehicle are mixed with each other by the air conditioning means 4 and 9 so as to be conditioned with each other, and they are supplied to corresponding muffling means 7 and 13 and introduced into a duct 8. The duct 8 uniformly introduces conditioned air into the compartment and also supplies conditioned air to required portions, for example, a driver's cabin and a lavatory. Air circulated in the compartment is, via an individual duct, introduced into an exhaust means through exhaust ports formed in the floor, and is exhausted to the outside of the vehicle through this exhaust means. Fig. 12 is a schematic cross sectional view taken along a cross sectional line XII-XII of Fig. 11. The air passages 3a and 3b are formed by partitioning the inside portion of an outer surface 18 of a vehicle body 1. Fig. 13 is a cross sectional view taken along a cross sectional line XIII-XIII of Fig. 11. The air passages 3b and 12 are formed in such a manner that they are partitioned by a partition member 20. Fig. 14 is a cross sectional view taken along a cross sectional line XIV-XIV of Fig. 11. In this portion, only the air passage 3b is formed. The structure thus arranged encounters a problem that odor from a lavatory can be mixed with the circulating air in the case where a lavatory is located in the compartment. In order to overcome the aforesaid problem, an exclusive exhaust means and an exhaust passage for the lavatory are individually provided in the aforesaid conventional structure. In this case, the number of the facilities and equipment cannot be decreased, causing the structure to be complicated and causing the cost to be enlarged. Furthermore, the configuration of the facilities is too complicated as shown in Figs. 11 to 14 and therefore the construction cannot be easily established. Therefore, the conventional structure cannot be manufactured easily. What is worse, it is difficult for each of the air passages to keep a required cross sectional area due to a limitation of the installation space. Therefore, a problem of noise usually takes place due to the cooling and heating performance, the air quantity and the wind velocity. Since the conventional structure is composed of a single ventilation system in the overall vehicle, another problem arises in that the overall function is stopped when the ventilating apparatus becomes defected. Furthermore, the compartment cannot be divided into smoking inhibited seats and permitted seats because the circulated air is not separated. SUMMARY OF THE INVENTION An object of the present invention is to provide a ventilating apparatus for a conveyance, the structure and the construction of which can be simplified, which can be easily manufactured, which is capable of eliminating noise while maintaining a desired air conditioning performance and keeping a proper air quantity and wind velocity, with which a necessity of providing exclusive discharge means for a lavatory can be eliminated, in which, even if either of the ventilating apparatuses has encountered a malfunction, the residual ventilating apparatus is able to be operated so that the influence of the malfunction is reduced, and with which the atmosphere of each compartment can be maintained because the compartment is sectioned as desired and influence between other compartments can be prevented so that the function of the conveyance is improved. According to the present invention, there is provided a ventilating apparatus for a conveyance comprising: a first conduit for supplying conditioned air into a compartment; a second conduit for circulating air in the compartment; a third conduit for exhausting air in the compartment; single ventilating means for both sucking air from the outside of the compartment and for exhausting air to the outside of the compartment; and air conditioning means which mixes, with each other, air sucked from the outside of the compartment via the ventilating means and air circulated from the inside of the compartment via the second conduit so as to make them conditioned air, wherein the first conduit is disposed in the upper portion of a vehicle and is connected to the air conditioning means via a rising conduit arranged from the upper portion of the vehicle to the lower portion of the vehicle and a horizontal conduit disposed under the floor of the vehicle, the second conduit is disposed in the lower portion of the vehicle adjacent to the floor and is connected to the air conditioning means, and the third conduit is disposed adjacent to the floor of the vehicle in the lower portion of the vehicle and is connected to the ventilating means. EP-A-0 114 981 discloses a similar apparatus. The present invention may also be characterized in that two ventilating apparatuses are provided for one compartment and at least of the first conduits of the two ventilating apparatus are connected to each other. Furthermore, the present invention may be characterized in that the compartment is partitioned into a plurality of sections by insulating walls, and each of the partitioned compartments is provided with the ventilating apparatus each having the first, second, third conduits, ventilating means and air conditioning means. In addition, the present invention may be characterized in that the third conduit is connected to an exhaust port formed in a lavatory. The present invention may further be characterized in that the ventilating means is constituted by integrally forming suction means for sucking air from the outside of the compartment and an exhaust means for exhausting air in the compartment. The present invention may also be characterized in that a silencer is provided for the rising conduit. According to the present invention, conditioned air supplied from the air conditioning means disposed in the lower portion is, via the horizontal conduit and the rising conduit, supplied to the first conduit disposed in the upper portion, the supplied air being then supplied to the inside of the compartment through the first conduit. The second conduit disposed in the lower portion introduces air in the compartment so as to circulate it to the air conditioning means. The air conditioning means is also supplied with air from the outside of the vehicle introduced by the suction means included by the ventilating means so as to be mixed with circulated air. The third conduit is further disposed in the lower portion so as to introduce air in the compartment to be exhausted so as to be exhausted to the outside of the vehicle by the exhaust means included by the ventilating means. Therefore, only the first conduit is disposed in the upper portion, while the second and the third conduits are respectively individually disposed. Hence, each of the conduits is able to have a sufficiently large cross sectional area, causing a proper air quantity to be kept. Therefore, noise can be eliminated satisfactorily while necessitating a simple structure. Also according to the present invention, one compartment may be partitioned into a plurality of sections each of which has the first, the second and the third conduits, the air conditioning means and the ventilating which are individually disposed so that air in each compartment can be individually conditioned and ventilated. Other and further objects, features and advantages of the invention will be appear more fully from the following description. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic and perspective view which illustrates an embodiment of the present invention adapted to a railway vehicle 27; Fig. 2 is a schematic plan view which illustrates the structure of the upper portion of the embodiment; Fig. 3 is a schematic plan view which illustrates the structure of the lower portion of the vehicle 27 according to the embodiment of the present invention; Fig. 4 is a schematic cross sectional view taken along a cross sectional line IV-IV of Fig. 3; Fig. 5 is a schematic cross sectional view taken along a cross sectional line V-V of Fig. 4; Fig. 6 is a schematic cross sectional view taken along a cross sectional line VI-VI of Fig. 4; Fig. 7 is a partially schematic perspective view which illustrates the embodiment shown in Figs. 1 to 6; Fig. 8 is a block diagram which illustrates the system according to embodiment of the present invention; Fig. 9 is a schematic perspective view which illustrates another embodiment of the present invention adapted to a railway vehicle; Fig. 10 is a block diagram which illustrates the system according to the other embodiment of the present invention; Fig. 11 is partial plan view which illustrates a conventional ventilating apparatus; Fig. 12 is a schematic cross sectional view taken along a cross sectional line XII-XII of Fig. 11; Fig. 13 is a schematic cross sectional view taken along a cross sectional line XIII-XIII of Fig. 11; and Fig. 14 is a schematic cross sectional view taken along a cross sectional line XIV-XIV of Fig. 11. DESCRIPTION OF THE PREFERRED EMBODIMENTS Fig. 1 is a schematic and perspective view which illustrates an embodiment of the present invention constituted in such a manner that a ventilating apparatus is provided for a vehicle 27 which is an example of the conveyance. Fig. 2 is a schematic plan view which illustrates the upper structure of this embodiment. Fig. 3 is a schematic plan view which illustrates the structure of the lower portion of the vehicle 27. Fig. 4 is a schematic cross sectional view taken along a cross sectional line IV-IV of Fig. 3, Fig. 5 is a schematic cross sectional view taken along a cross sectional line V-V of Fig. 4, and Fig. 6 is a schematic cross sectional view taken along a cross sectional line VI-VI of Fig. 4. With reference to these drawings and Fig. 7 which is a schematic view of the ventilating apparatus for a vehicle, the embodiment of the present invention will now be described. This embodiment is constituted in such a manner that the ventilating apparatus is disposed substantially axis symmetrically with respect to a symmetric axis 28 vertically extending from the surface of the drawing sheets on which Figs. 2 and 3 are drawn. However, the same effect can be obtained even if the configuration of the ventilating apparatus is made plane symmetric, that is, mirror symmetric with respect to a symmetric plane designated by an alternate long and short dash line which passes through the symmetric axis 28. The vehicle 27 has first conduits 29 and 30 on both sides of the upper portion thereof. The right and the left first conduits 29 and 30 are connected to each other at predetermined positions of the vehicle 27 by connecting conduits 31 and 32. Air conditioning means 34 and 35 are disposed below a floor 33 of the vehicle 27. Conditioned air cooled or heated by the air conditioning means 34 and 35 is passed through horizontal conduits 36 and 37 disposed below and along the floor 33 and also passed through rising conduits 38 and 39 so that the cooled or heated air is supplied to the first conduits 29 and 30. It is preferable to form the rising conduits 38 and 39 by utilizing partition walls which partition the compartments and also preferable to make them to be included at positions opposing door pockets 42 and 43 for doors 40 and 41. As a result, the rising conduits 38 and 39 are given sufficiently large cross sectional areas while enabling the doors 40 and 41 to be smoothly opened/closed. Since relatively large spaces can be obtained in the aforesaid case, a muffling means for muffling noise generated by the air conditioning means 34 and 35 can be located. Specifically, the rising conduits 38 and 39 may be formed into silencers. Furthermore, this embodiment is arranged in such a manner that second conduits 46 and 47 for circulating air in a compartment 44 are disposed adjacent to the floor 33 in the lower portion of the vehicle 27 to face the compartment 44 of the vehicle 27, the second conduits 46 and 47 being disposed axial symmetrically as described above. Air circulated from the compartment 44 is introduced through the second conduits 46 and 47 so that it is circulated into the air conditioning means 34 and 35. The air conditioning means 34 and 35 are, via air supply conduits 48 and 49, supplied with outdoor fresh air by suction means of ventilating means 53 and 54 each of which comprises an axial fan. In the air conditioning means 34 and 35, circulated air passed from the second conduits 46 and 47 and air passed from the air supply conduits 48 and 49 are mixed with each other so that conditioned air is again passed to the horizontal conduits 36 and 37. Furthermore, third conduits 51 and 52 facing the compartment are axial-symmetrically disposed in the lower portion of the vehicle 27 adjacent to the floor 33, the third conduits 51 and 52 being arranged to discharge the air in the compartment 44 to the outside of the vehicle 27. Ventilating means 53 and 54 each comprising an axial fan are connected to the third conduits 51 and 52. The ventilating means 53 and 54 are disposed below the floor 33, the ventilating means 53 and 54 each including a discharge means for discharging air 55 and 56 in the compartment 44 and suction means for sucking outdoor air to supply it to the compartment 44. Then, the case where a lavatory and a wash room are placed in the compartment will now be described. In the case where the lavatory and the like are placed at positions designated by phantom lines of Fig. 3, a lavatory 57 which emits odor is placed in the vicinity of the third conduit 51, while a wash room 58 which does not emit odor is placed in the vicinity of the second conduit 47 which opposes the third conduit 51. Each of the exhaust ports of the lavatory 57 and the wash room 58 is connected to the third conduit 51 or the second conduit 47. As a result, the lavatory 57 is connected to the third conduit 51 which exclusively exhaust air while been insulated from the second conduit 47 which exclusively circulates air. Hence, the odor of the lavatory cannot mixed with the circulating air and therefore the necessity of providing an individual exhaust means for the lavatory can be eliminated. Fig. 8 is a block diagram which illustrates an air passage system according to this embodiment, wherein ventilating apparatuses constituting two systems are placed in one compartment 44. The first conduits 29 and 30 included by the two systems are connected to each other by the connecting pipes 31 and 32. If necessary, the second conduits 46 and 47 may be connected to each other and the third conduits 51 and 52 may be connected to each other. In this case, the second system is able to compensate the malfunction of the first system. According to this embodiment thus arranged, each of the first conduits 29 and 30, the second conduits 46 and 47 and the third conduits 51 and 52 can be individually and simply constituted. Consequently, the overall structure of the system can be simplified while overcoming the aforesaid problems experienced with the conventional technologies and structures. Since each of the aforesaid components can be disposed in arbitrary directions in the vehicle while being satisfactorily balanced, each of the conduits 29, 30, 46, 47, 51 and 52 is able to have a sufficient and proper large cross sectional area while satisfactorily preventing the undesirable loss. Hence, air of a required quantity can be introduced through each of the aforesaid conduits. Therefore, the problem taken place in that the compartment 44 cannot keep a satisfactorily large space can be overcome. Another embodiment of the present invention shown in Fig. 9 enables the function of the vehicle to be improved because it is arranged in such a manner that an insulating wall 70 is disposed adjacent to the aforesaid symmetric axis 28 of the vehicle so that the compartment is partitioned into a smoking-permitted room and a inhibited room. In this case, the first conduits 29 and 30 are respectively closed adjacent to the insulating wall 70. As a result, air in each of the compartments can be individually conditioned by the individual system arranged as shown in Fig. 10, and therefore the introduction of contaminated air in the smoking-permitted room into the smoking-inhibited room can be prevented. The present invention can be widely adapted to another vehicle or a facility as well as the railway vehicle. By introducing and jetting air 55 and 56 discharged through outlet ports of the ventilating means 53 and 54 into underfloor equipment disposed below the floor 33, the underfloor equipment can be cooled. As described above, according to the present invention, conditioned air supplied from the air conditioning means is introduced into the first conduit disposed in the upper portion of the vehicle so as to be supplied into the compartment, the second conduit for sucking air in the compartment and for circulating it is disposed in the lower portion of the vehicle, air which has been passed through the second conduit is introduced into the air conditioning means, and the air conditioning means is also supplied with outdoor fresh air by the suction mean of the ventilating means so that air is conditioned. Furthermore, the third conduit is disposed in the lower portion of the vehicle so that air in the compartment is, via the third conduit, exhaust to the outside of the vehicle via the exhaust means of the ventilating means. As a result, the present invention enables the structure to be simplified, a complicated labor required when it is manufactured to be eliminated, a desired air conditioning performance to be kept, and noise to be eliminated while keeping a proper air quantity and wind velocity. The structure according to the present invention may be arranged in such a manner that the two systems of the ventilating apparatuses are provided in the compartment and at least of the first conduit of the aforesaid ventilating apparatuses is connected to each other by the connecting conduit, so that a problem taken place in that one of the ventilating apparatuses has encountered a malfunction can be overcome by continuing the desired ventilation and the air harmonization by means of the residual ventilating apparatus. Furthermore, the structure according to the present invention may be arranged in such a manner that the compartment is partitioned as desired, and each of the partitioned compartments has the individual first, second, third conduits, air conditioning means and ventilating means, so that air of each of the compartments can be individually conditioned and ventilated while preventing the influence upon the other compartments. Therefore, the atmosphere of each of the compartments can be maintained satisfactorily. In addition, even if a lavatory is placed in the compartment, propagation of odor in the compartment can be prevented because the exhaust port of the lavatory is connected to the third conduit. As described above, the present invention is able to improve the practical advantage of a conveyance. Although the invention has been described in its preferred form with a certain degree of particularly, it is understood that the present disclosure of the preferred form has been changed in the details of construction and the combination and arrangement of parts may be resorted to without departing from the scope of the invention as hereinafter claimed.

Claims: A ventilating apparatus for a conveyance comprising: a first conduit (29, 30) for supplying conditioned air into a compartment; a second conduit (46, 47) for circulating air in said compartment; a third conduit (51, 52) for exhausting air in said compartment; single ventilating means (53, 54) for both sucking air from the outside of said compartment and for exhausting air to the outside of said compartment; and air conditioning means (34, 35) which mixes, with each other, air sucked from the outside of said compartment via said ventilating means (53, 54) and air circulated from the inside of said compartment via said second conduit (46, 47) so as to make them conditioned air, wherein said first conduit (29, 30) is disposed in the upper portion of a vehicle (27) and is connected to said air conditioning means (34, 35) via a rising conduit (38, 39) extending from the lower portion of said vehicle to the upper portion of said vehicle and a horizontal conduit (36, 37) disposed under the floor (33) of said vehicle, said second conduit (46, 47) is disposed in the lower portion of said vehicle (27) adjacent to said floor (33) and is connected to said air conditioning means (34, 35), and said third conduit (51, 52) is disposed adjacent to said floor (33) of said vehicle (27) in the lower portion thereof and is connected to said ventilating means (53, 54). The apparatus of claim 1, wherein two ventilating apparatus (53, 54) are provided for one compartment and at least said first conduits (29, 30) of said two ventilating apparatus are connected to each other. The apparatus of claim 1, wherein said compartment is partitioned into a plurality of sections by insulating walls (70), and each of said partitioned compartments is provided with said ventilating apparatus each having said first, second, third conduits (29, 30; 46, 47; 51, 52), ventilating means (53, 54) and air conditioning means (34, 35). The apparatus of any one of claims 1 to 3, wherein said third conduit (51, 52) is connected to an exhaust port formed in a lavatory. The apparatus of any one of claims 1 to 4, wherein said ventilating means (53, 54) is constituted by integrally forming suction means for sucking air from the outside of said compartment and an exhaust means for exhausting air in said compartment. The apparatus of any one of claims 1 to 5, wherein a silencer is provided for said rising conduit (38, 39).

Inventors: HAYASHI HIROKI, ISHIDA TAKESHI, HAYASHI, HIROKI, ISHIDA, TAKESHI
Applicants: KAWASAKI HEAVY IND LTD, KAWASAKI JUKOGYO KABUSHIKI KAISHA
Application year: 1992
Main classification: B61D27
IPC codes: B61D27