WO2014024318A1

WO2014024318A1 - On-roof air-conditioning device

Info

Publication number: WO2014024318A1
Application number: PCT/JP2012/070544
Authority: WO
Inventors: 雄介大山; 善生丸野
Original assignee: 株式会社日立製作所
Priority date: 2012-08-10
Filing date: 2012-08-10
Publication date: 2014-02-13

Abstract

Provided is an on-roof air-conditioning device (30) for a rail vehicle, the on-roof air-conditioning device capable of preventing raindrops and the like contained in vehicle exterior air introduced into the air-conditioning device (30) from a ventilation opening (38) from dripping from a return port (31) into the vehicle. An air-conditioning device (30) is mounted on the roof of a rail vehicle (10, 12, 14), is provided with: a return port (31) through which vehicle interior air in the rail vehicle (10, 12, 14) is taken into the air-conditioning device (30); a ventilation opening (38) which is provided in a side plate installed at an end in the width direction of the air-conditioning device (30) and along the longitudinal direction thereof and through which vehicle exterior air is taken into the air-conditioning device (30); an indoor heat exchanger (35); and an indoor blower (32) which supplies conditioned air into the vehicle, and is provided with, between the ventilation opening (38) and the return port (31), a duct (42) which changes the flow direction of the vehicle exterior air.

Description

Roof top air conditioner

The present invention relates to a rail vehicle air conditioner, and more particularly to an air conditioner provided with a mechanism for introducing fresh air into an air conditioner housing and disposed on the roof of the rail vehicle.

The rail vehicle air conditioner may be mounted under the floor of the rail vehicle or on the roof of the rail vehicle.

When the air conditioner is installed under the floor, the upright duct that guides the conditioned air conditioned by the underfloor air conditioner from the underfloor to the ceiling of the rail vehicle, and the ceiling that extends from the rising duct in the longitudinal direction (horizontal direction) of the rail vehicle A duct. Using both these ducts, conditioned air is supplied to each part of the rail vehicle.

When the air conditioner is mounted on the roof, conditioned air is supplied to a ceiling duct provided in the ceiling, and conditioned air is supplied to each part of the rail vehicle through the ceiling duct.

Conventionally, there has been an example in which a plurality of air conditioners are distributed and arranged on the roof of one rail vehicle, but in recent years, one air conditioner for each rail vehicle is roofed to reduce maintenance costs. The case where it is arranged on top is becoming mainstream.

Furthermore, there are cases where a ventilator is provided that is provided on the roof and introduces the air inside the rail vehicle using the traveling wind of the rail vehicle or discharges the air inside the vehicle outside the vehicle. When a ventilator is provided, the roof structure of the rail vehicle has to be provided with an opening for the ventilator, which tends to increase the number of steps for processing the roof structure. For this reason, in order to abbreviate | omit the process which provides an opening part in a roof structure and to reduce a process man-hour, it exists in the tendency replaced with the air conditioning apparatus provided with the opening part for ventilation instead of ventilation by a ventilator.

Ventilation is provided for the type that takes outside air into the case of the ventilator through the ventilation opening (air intake) provided in the air conditioner or the opening provided in the case of the air conditioner by the indoor blower built in the air conditioner. There are types including a fan (a supply fan or an exhaust fan).

Patent Document 1 discloses an air conditioner including a ventilation opening, and Patent Document 2 discloses an air conditioner including an exhaust fan in the ventilation opening.

JP 05-16803 A Japanese Patent Laid-Open No. 02-31915

The temperature and humidity of the outside air introduced into the air conditioner through the opening for ventilation is often higher than the temperature and humidity in the car in summer and low in winter. For this reason, the outside air introduced into the air conditioner is taken into the interior of the air conditioner casing on the upstream side of the indoor heat exchanger provided in the air conditioner, and is installed in the indoor heat exchanger or the indoor heat exchanger. After being harmonized with each other, passengers and the like are prevented from feeling uncomfortable by supplying them into the vehicle.

A return opening (hereinafter referred to as a return port) through which air in the vehicle is taken into the air conditioner is provided at the bottom of the air conditioner casing on the upstream side of the indoor heat exchanger. The air in the vehicle taken into the air conditioner through the return port is mixed with the air outside the vehicle taken into the air conditioner through the ventilation opening described above, and then the temperature and the air in the process of passing through the indoor heat exchanger. After being harmonized with humidity, it is supplied again into the rail vehicle.

Since the ventilation opening is provided near the return opening, in the case of a typhoon or the like, rainwater or the like enters the air conditioner from the ventilation opening and, in some cases, blows into the rail vehicle from the return opening. There is a case.

The present invention has been made in view of these problems, and a rail vehicle that can suppress raindrops and the like contained in air outside the vehicle introduced into the air conditioner from the ventilation opening from dropping into the vehicle from the return port. It is to provide a roof top air conditioner.

In order to solve the above problems, the present invention is an air conditioner mounted on the roof of a rail vehicle, wherein the air conditioner includes a return port for taking air in the rail vehicle into the air conditioner. The air-conditioning device in the widthwise direction, provided in a side plate provided along the longitudinal direction of the air-conditioning device and taking in air outside the vehicle into the air-conditioning device, the air in the vehicle and the air In a rail vehicle rooftop air conditioner comprising an indoor heat exchanger that harmonizes air outside the vehicle and an indoor fan that supplies conditioned air to the interior of the vehicle, between the ventilation opening and the return port, A duct for changing the flow direction of air outside the vehicle is provided.

According to the present invention, even in the case of a typhoon or the like, a rail vehicle that can prevent raindrops and the like contained in air outside the vehicle introduced into the air conditioner from the ventilation opening from dropping into the vehicle from the return port. An on-roof air conditioner can be provided.

FIG. 1 is a side view of vehicle formation formed by a plurality of rail vehicles. FIG. 2 is a cross-sectional view taken along line AA of the air conditioner provided on the roof of the rail vehicle shown in FIG. FIG. 3 is a cross-sectional view taken along the line BB of the air conditioner shown in FIG. FIG. 4 is a cross-sectional view taken along the line CC of the air conditioner shown in FIG. FIG. 5 is an enlarged plan view of a part of the indoor equipment room of the air conditioner. FIG. 6 is a plan view of an air conditioner including a blower in a duct provided in the indoor equipment room.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.

FIG. 1 is a side view of vehicle organization formed by a plurality of railway vehicles. A rail vehicle is a general term for vehicles that are operated along a laid rail, and indicates a rail vehicle, a monorail vehicle, an LRV (tram), and the like. Here, a case of a railway vehicle will be described as an example of a rail vehicle.

The vehicle organization 1 is composed of railway vehicles 10 (12, 14), and a through-passage 16 through which passengers and the like can move between the railway vehicles is provided at a connecting portion between these railway vehicles. An air conditioner 30 for controlling the temperature and humidity in the vehicle is installed on the roof of each railway vehicle.

FIG. 2 is a cross-sectional view taken along the line AA of the air conditioner provided on the roof of the railway vehicle shown in FIG. The air conditioner 30 is connected to a compressor 34, an outdoor heat exchanger (condenser) 36, a throttle (not shown) for adiabatic expansion of refrigerant, an indoor heat exchanger 35, and these devices. And a refrigerant cycle (not shown).

The air conditioner 30 includes an indoor equipment room 52 in which an indoor heat exchanger 35 and an indoor fan 32 are provided, an equipment room 54 in which a compressor 34 and the like are provided, an outdoor heat exchanger 36 and an outdoor fan 37 and the like. And an equipment room 56.

An indoor blower 32 is provided on the downstream side of the indoor heat exchanger 35. The indoor blower 32 takes air inside the vehicle into the air conditioner 30 and air outside the vehicle and harmonizes (adjusts) the temperature and humidity of the air-fuel mixture with the indoor heat exchanger 35. The conditioned air is supplied into the vehicle.

The air inside the vehicle passes through a return opening 31 (hereinafter referred to as a return port 31) provided in a manner that allows communication between the bottom plate of the casing of the air conditioner 30 and the roof structure of the railway vehicle 10 (12, 14). It is taken into the machine room 52. Air outside the vehicle is taken into the indoor unit room 52 via the ventilation openings 38 provided on the side plates provided along the longitudinal direction of the air conditioner 30 at both ends in the width direction of the air conditioner 30. A cover 40 is disposed outside the side plate provided with the ventilation opening 38 so that dust, raindrops, and the like do not easily enter the interior of the indoor unit room 52.

A duct 42 is provided inside the ventilation opening 38, and air 62 outside the vehicle taken into the air conditioner 30 passes through the duct 42, and the longitudinal direction of the air conditioner from the width direction of the air conditioner 30. The flow direction is changed to the direction, and the air is guided to the indoor heat exchanger 35.

The outdoor blower 37 releases the heat (including exhaust heat from the compressor 34) taken from the air inside and outside the vehicle from the refrigerant passing through the outdoor heat exchanger 36 in the process of passing through the indoor heat exchanger 35. Have a role to do.

3 is a cross-sectional view taken along the line BB of the air conditioner shown in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line CC of the air conditioner shown in FIG.

The roof structure that forms the roof of the railway vehicle 10 (12, 14) is composed of a shape member composed of two facing face plates and ribs that connect the face plates. A ceiling cover 70 having design properties is provided on the inner side of the roof structure, and two harmony are provided between the roof structure and the ceiling cover 70 along the longitudinal direction of the railway vehicle 10 (12, 14). An air duct 73 is provided. The conditioned air generated by the air conditioner 30 is supplied to each part of the railway vehicle 10 (12, 14) by the conditioned air duct 73. An opening is provided in the lower portion of the cover 40 provided outside the ventilation opening 38 of the air conditioner 30. After the outside air flows in the height direction from the opening, the ventilation opening 38, It is guided to the indoor heat exchanger 35 (see FIG. 2) through the duct 42. Most of dust, raindrops, and the like contained in the air outside the vehicle is suppressed from flowing into the air conditioner 30 by being removed while the air outside the vehicle flows in the height direction.

FIG. 5 is an enlarged plan view of a part of the indoor equipment room of the air conditioner. The configuration and function of the duct 42 provided in the equipment room 52 will be described. The duct 42 changes the flow direction of the air outside the vehicle that flows into the air conditioner 30, and raindrops or the like contained in the air outside the vehicle pass from the return port 31 (return duct 71, see FIG. 3) to the railcar 10 (12 , 14) has a function of suppressing dripping into the vehicle.

The duct 42 includes a duct inlet 47 that is in contact with the peripheral edge of the ventilation opening 38 provided in the air conditioner, a first duct 44 that extends from the duct inlet 47 in the width direction of the air conditioner 30, and a first duct 44. And a second duct 46 extending in the longitudinal direction of the air conditioner 30 and a duct outlet 48 provided at a terminal portion of the second duct 46.

The outside air flowing into the duct 42 from the duct inlet 47 flows along the first duct 44 and then collides with the second duct 46 and changes the flow direction from the width direction of the air conditioner 30 to the longitudinal direction. After flowing along the two ducts 46, it flows out from the duct outlet 48 toward the indoor heat exchanger 35. Raindrops and the like contained in the air outside the vehicle collide with the wall of the second duct 46 in the process of changing the flow of the air outside the vehicle from the first duct 44 to the second duct 46, and thus drop from the return port 31 into the vehicle. It is suppressed.

Alternatively, by making the planar shape of the duct 42 substantially L-shaped, raindrops or the like contained in the air outside the vehicle does not travel straight from the ventilation opening 38 in the width direction of the air conditioner 30, but in the second direction. Since it is obstructed by the duct 46, it is possible to suppress dripping from the return port 31 (return duct 71) disposed ahead of the duct 46 into the train.

FIG. 6 is a plan view of an air conditioner including a blower in a duct provided in the indoor equipment room. This is an example in which a supply air blower 39 a or an emergency exhaust blower 39 b is provided at a duct inlet 47 of the duct 42.

By providing the air supply fan 39a, the air outside the vehicle can be taken into the air conditioner 30 more reliably than the method in which the air outside the car is taken into the air conditioner 30 by the indoor fan 35. When the air supply blower 39a includes a propeller fan, raindrops or the like contained in the air outside the vehicle may be greatly scattered in the radial direction of the propeller fan. Even when raindrops or the like are largely scattered by the air supply blower 39a, the provision of the duct 42 prevents the raindrops or the like from dropping from the return port 31 through the return duct 71 into the train. Can do.

In addition, the amount of air in the vehicle that is substantially the same as the amount of air outside the vehicle taken into the vehicle of the railway vehicle 10 (12, 14) via the air conditioner 30 by the air supply blower 39a is getting on and off the rail vehicle 10 It is discharged out of the vehicle through the gap between the side sliding door for the vehicle and the vehicle body, the opening for drainage provided at the lower end of the door pocket in which the side sliding door is stored.

Also, an emergency ventilation blower 39b that functions as an exhaust blower can be attached instead of the supply blower 39a. The emergency ventilation blower 39b includes a propeller fan and is not energized except in an emergency (for example, a vehicle fire), and the air from outside the vehicle is introduced into the air conditioner 30 by the indoor blower 35. It is rotating like. Even if raindrops and the like are largely scattered by the propeller fan that is a main component of the emergency ventilation blower 39b, by providing the duct 42, the raindrops and the like pass through the return duct 31 and the return duct 71 to the inside of the railway vehicle. It can suppress dripping in.

Note that the emergency ventilation blower 39b is operated according to the operation command from the air conditioning control device only in an emergency, and the air inside the railway vehicle 10 (12, 14) is changed to the flow direction of the normal air flow 62 outside the vehicle. Discharges out of the car in the opposite direction.

Further, instead of the supply air blower 39a, an exhaust blower that discharges the air inside the vehicle to the outside of the vehicle may be provided.

DESCRIPTION OF SYMBOLS 1 ... Formation vehicle 10 (12, 14) ... Railway vehicle 16 ... Through-passage 30 ... Air conditioner 30 ... Air conditioner 31 ... Return port (opening part)
32 ... Indoor fan 33 ... Harmonic air supply port 34 ... Compressor 35 ... Indoor heat exchanger 36 ... Outdoor heat exchanger 37 ... Outdoor fan 38 ... Ventilation opening 39a ... Air supply fan 39b ... Emergency exhaust fan 40 ... Cover DESCRIPTION OF SYMBOLS 42 ... Duct 44 ... 1st duct 46 ... 2nd duct 47 ... Duct inlet 48 ... Duct exit 52 ... Indoor unit room 54 ... Equipment room 56 ... Outdoor unit room 60 ... Flow of recirculation air 62 ... Flow of air from the outside of a vehicle 64 ... Flow of conditioned air 70 ... Ceiling cover 71 ... Return duct 73 ... conditioned air duct

Claims

A roof air conditioner mounted on the roof of a rail vehicle,
The air conditioner
A return port for taking the air inside the rail vehicle into the air conditioner;
An opening for ventilation that is provided at a side plate provided along the longitudinal direction of the air conditioner in the width direction and takes air outside the vehicle into the air conditioner;
An indoor heat exchanger that harmonizes the air inside the vehicle and the air outside the vehicle;
In a roof top air conditioner comprising an indoor blower that supplies conditioned air into the vehicle,
A roof top air conditioner comprising a duct for changing a flow direction of air outside the vehicle between the ventilation opening and the return port.
In the roof top air conditioner described in claim 1,
The duct is
A first duct disposed along the width direction of the air conditioner;
A roof air conditioner comprising: a second duct connected to the first duct and disposed along a longitudinal direction of the air conditioner.
In the roof top air conditioner described in claim 2,
An on-roof air-conditioning apparatus comprising an air supply blower that supplies air outside the vehicle to the inside of the vehicle at a connection portion between the duct and the opening for ventilation.
In the roof top air conditioner described in claim 2,
An on-roof air conditioner comprising an exhaust blower for discharging the air in the vehicle to the outside of the vehicle at a connection portion between the duct and the opening for ventilation.
In the roof top air conditioner described in claim 2,
An on-roof air conditioner characterized in that an emergency exhaust blower that exhausts the air in the vehicle to the outside of the vehicle in an emergency is provided at a connection portion between the duct and the ventilation opening.
In the roof top air conditioner described in claim 5,
The above-described emergency exhaust blower includes a propeller fan.