An air conditioner includes: a suction port; a suction grill provided at the suction port and including a plurality of bars spaced apart from one another and arranged substantially parallel to one another and a suction surface located at suction-side end portions of the plurality of bars; and an air blower configured to suction air from the suction port through the suction grill. Each of the plurality of bars includes an inclined plate portion and a flow straightening plate portion, which are arranged in this order from the suction surface toward a downstream side of the flow of the air, the inclined plate portion being inclined with respect to the suction surface, the flow straightening plate portion being continuously formed from the inclined plate portion and extending in a direction substantially perpendicular to the suction surface and toward the downstream side.

The present invention discloses an interior air quality monitoring and ventilation control method and system for a train. The interior air quality monitoring and ventilation control method for the train comprises: acquiring multiple groups of interior and exterior air quality detection data; acquiring interior and exterior air comprehensive evaluation index Q.sub.0 and Q.sub.1 by using the experimental data; training an exterior fresh air volume control model if Q.sub.0?Q.sub.1, or else training an interior air purification control model; detecting the interior and exterior air quality detection data; acquiring the interior and exterior air comprehensive evaluation index Q.sub.0 and Q.sub.1 by using the detection data; if Q.sub.0?Q.sub.1, calling the exterior fresh air volume control model to obtain the required ventilation volume level and controlling a ventilation system with the output result; otherwise, calling the interior air purification control model to obtain the required ventilation volume level and air purification device power level, controlling the ventilation system and the air purification device with the output results. The present invention can apply suitable ventilation control strategies according to different degrees of air quality, to achieve a health guarantee for the interior air quality of the high-speed train under the conditions of energy conservation and environmental protection.

There is provided an underfloor duct which enables inspection of electric equipment to be easily performed, has a simple structure, and hardly allows water to intrude into a duct passage.

An underfloor duct according to an aspect of the present invention is an underfloor duct, provided under a floor of a railcar, for storing electric equipment including a cable. The underfloor duct includes: a box having a frame that projects upward, and an opening that opens downward; and a lid that closes the opening and forms a duct passage between the lid and the box. An end portion of the box is located outside an end portion of the lid in a car width direction.

Some embodiments of the present disclosure provide a side wall component of a railway vehicle, and a railway vehicle. The side wall component of a railway vehicle includes: a side wall, including a side wall body; and a plurality of side wall upright columns, connected with the side wall body respectively, the plurality of side wall upright columns being provided along a length direction of the side wall body at an interval, wherein an auxiliary air duct of the railway vehicle is formed between at least two side wall upright columns and the side wall body in the length direction of the side wall body. The embodiment of the present disclosure enables the railway vehicle to be compact in structure.

The present invention relates to a power car for a high-speed train, including: a body (12); a traction motor (16, 17); a rheostatic brake (30); a first ventilation device (32) of said rheostatic brake; electrical control equipment (64); and a second ventilation device (66) for said electrical equipment.

The first ventilation device comprises a first air intake sheath (38), the inlet and outlet of which are located on the roof (19) of the body. The second ventilation device comprises a second sheath, the inlet and outlet of which are respectively located on the roof of the body and below the body. Each ventilation device comprises a fan (46) arranged in one of the sheaths.

The present invention relates to a power car (10) for a high-speed train, comprising a body (12) and at least one power car of said body, said body comprising a roof (19) and a floor (20); the traction motor being arranged below said floor, the body further comprising an equipment room (24) defined between said roof and said floor, said technical room including: electrical equipment (33) for controlling the traction motor; and at least one fan device (34) of said electrical equipment.

The ventilation device comprises: an air intake sheath (36), forming a closed pipe between an inlet (38) and an outlet (40) open on the equipment room; and a fan (42) arranged between the inlet and the outlet, so as to create an overpressure in the technical room.

An airflow direction plate elongated in a direction perpendicular to a direction of an air flow from an indoor fan is disposed between the indoor fan and an air supply duct opening. The airflow direction plate has air vents arranged in a longitudinal direction, inclined plates each disposed to a corresponding one of the air vents and having different angles of inclination corresponding to positions of the air vents, and an acoustic material disposed on a surface facing the indoor fan. An indoor unit has a first air passageway allowing the air from the indoor fan to flow in the longitudinal direction of the airflow direction plate for a detour to the air supply duct opening and a second air passageway allowing the air from the indoor fan to flow into the air vents along the inclined plates.

A public transport land vehicle, in particular of the bus type, includes a passenger compartment intended to accommodate several people, and at least one technical compartment which can be accessed from the passenger compartment, at least one technical compartment, called upper compartment, is arranged on/in the upper wall of the passenger compartment.

An air conditioning device with a first heat exchanger on a low-pressure side and a second heat exchanger on a high-pressure side of the air conditioning device. A cooling medium in a cooling circuit of the air conditioning device is under a higher pressure on the high-pressure side than on the low-pressure side. The first heat exchanger is arranged in a first housing portion on the low-pressure side, and the second heat exchanger is arranged in a second housing portion of the air conditioning device on the high-pressure side. A smoke removal opening is arranged between the first and the second housing portions. The smoke removal opening is closed during the normal operation of the air conditioning device and can be opened in the event of a fire and allow a flow of air from the first housing portion into the second housing portion.

The article transport vehicle travels with its wheel rolling on the travel surface provided on the upper surface of the travel rail. The travel rail has a peripheral wall that includes a surface on which the travel surface is formed, and an internal space that is enclosed by the peripheral wall, and extends along the travel path. The travel surface has a through hole that passes through the peripheral wall, and brings the internal space into communication with an external space. The travel rail is provided with a suction device that is in communication with the internal space, and is configured to suck air in the internal space. The internal space is closed except for the through hole, and a connection portion for the suction device.