JP2009190495A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To introduce fresh air from a ventilation blower by dispersing the fresh outside air to the whole of a fresh outside air intake surface of a total enthalpy heat exchanger, even if a distance between a fresh outside air blowout port of the ventilation blower and the total enthalpy heat exchanger is shortened. <P>SOLUTION: An air conditioner 1 is provided with a refrigerating cycle device provided with a compressor 2, an outdoor heat exchanger 6, an outdoor blower 4, an indoor heat exchanger 7 and an indoor blower 5, the ventilation blower 8 for taking in fresh outside air, and the total enthalpy heat exchanger 9 for exchanging heat between fresh outside air from the ventilation blower 8 and exhaust air from the inside of a vehicle. The total enthalpy heat exchanger 9 is arranged so that the longitudinal direction may be opposed to the fresh outside air blowout port of the ventilation blower 8. This air conditioner 1 is provided with a duct 10 for linking the fresh outside air blowout port of the ventilation blower 8 and the fresh outside air intake surface of the longitudinal direction of the total enthalpy heat exchanger 9 opposed to the fresh outside air blowout port, and a punching plate 11 provided in the duct 10 to introduce fresh outside air from the ventilation blower 8 by dispersing the fresh outside air to the fresh outside air intake surface of the total enthalpy heat exchanger 9. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an air conditioner including a ventilation fan that takes in fresh outside air, and a total heat exchanger that exchanges heat between the fresh outside air taken in from the ventilation fan and exhaust air from the inside of the vehicle.

A vehicle such as a railway is provided with an air conditioning system in order to improve the boarding environment of the passenger cabin. The air conditioning system generally includes a ventilation fan that ventilates the interior of the vehicle, and an air conditioner that sends cold air or conditioned air of hot air by heat exchange, and these are placed under the floor of the vehicle to improve driving performance. (For example, refer patent document 1).
In addition, there is also a vehicle air conditioner equipped with a total heat exchanger for the purpose of reducing the ventilation load of fresh outside air introduced by the ventilation fan because the ventilation fan is built in the air conditioner because of the vehicle body outfitting space.
JP 2006-256420 A

  The vehicle air conditioner as described above is desirably miniaturized as much as possible due to the space under the floor. However, in a vehicle air conditioner equipped with a total heat exchanger, a certain amount of duct length is required between the fresh outdoor air outlet of the ventilation fan and the total heat exchanger in order to equalize the passing air speed of the total heat exchanger. Therefore, the length of the air conditioner in the rail direction is long, which hinders downsizing.

Further, the wind speed of the air blown from the ventilation blower is about 20 m / sec or more, and if the wind hits the total heat exchanger locally, the total heat exchanger made of paper may be damaged.
In addition, since the ventilation fan must pass the air to the total heat exchanger, it is necessary to use a high static pressure blower. Therefore, noise is high at the fresh outside air inlet side and the exhaust air outlet of the ventilation fan. There was a problem of becoming.

  The present invention has been made in view of the above problems, and the distance between the fresh outside air outlet of the ventilation fan and the total heat exchanger is made as short as possible, and the fresh outside air from the ventilation fan is the total heat exchanger. The main object of the present invention is to provide a vehicle air conditioner that can be widely diffused and introduced into the fresh outside air intake surface. In addition, the present invention provides a vehicle air conditioner that reduces noise at the fresh outside air inlet side and the exhaust air outlet of the ventilation fan.

A vehicle air conditioner according to the present invention includes a compressor, an outdoor heat exchanger, an outdoor fan, an indoor heat exchanger, a refrigeration cycle apparatus including an indoor fan, a ventilation fan that takes in fresh outside air, and the ventilation fan. A vehicle air having a total heat exchanger for exchanging heat between fresh outside air and exhaust air from the inside of the vehicle, the total heat exchanger being arranged so that its longitudinal direction faces the fresh outside air outlet of the ventilation blower In the harmony device, a duct connecting the fresh outside air outlet of the ventilation blower and a fresh outside air intake surface in the longitudinal direction of the total heat exchanger facing the fresh outside air outlet, provided in the duct, And a punching plate for diffusing and introducing fresh outside air from the ventilation fan to the fresh outside air intake surface of the total heat exchanger.
Further, the ventilation fan has an action of sending out the exhaust air in the vehicle to the outside, and the exhaust air outlet of the ventilation fan is communicated with the downstream side of the outdoor fan.
Further, a shielding plate with a sound absorbing material is installed on the fresh outside air inlet side of the ventilation fan.

An air conditioner for a railway vehicle according to the present invention includes a ventilation fan that connects a fresh outside air outlet of a ventilation fan and a fresh outside air intake surface in a longitudinal direction of a total heat exchanger facing the fresh outside air outlet. A punching plate that diffuses and introduces fresh outside air to the fresh outside air intake surface of the total heat exchanger is installed, so even if the length of the duct is shorter than before, the fresh outside air from the ventilation blower is totally heat exchanged. Widely diffused into the fresh air intake surface of the vessel. For this reason, the size of the apparatus can be reduced by reducing the size of the air conditioner for a railway vehicle by the length of the duct.
Further, the action of the punching plate prevents the high-speed wind coming from the fresh outside air outlet of the ventilation blower from directly hitting the total heat exchanger, and the damage to the elements of the total heat exchanger can be avoided.
In addition, the exhaust air outlet of the ventilation fan is connected to the downstream side of the outdoor fan, and a shielding plate with sound-absorbing material is installed on the fresh air inlet side of the ventilation fan. Noise at the exit can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of a vehicle air conditioner according to an embodiment of the present invention as viewed from above, FIG. 2 is a cross-sectional view in the direction of AA in FIG. 1, and FIG. 3 is a cross-sectional view in the direction of BB in FIG. It is.

  The vehicle air conditioner 1 includes a compressor 2, an accumulator 3, an outdoor fan 4, an indoor fan 5, an outdoor heat exchanger 6, an indoor heat exchanger 7, and the like, and by connecting them with a refrigerant pipe, A refrigeration cycle apparatus is configured. In FIG. 1, the left side portion of the vehicle air conditioner 1 is an outdoor unit including a compressor 2, an accumulator 3, an outdoor fan 4, and an outdoor heat exchanger 6. The right side portion is an indoor unit that includes the indoor heat exchanger 7 and the indoor blower 5.

  In the central part of the vehicle air conditioner 1, fresh outside air (also referred to as fresh air) is taken into the vehicle air conditioner 1, and a ventilation blower 8 for discharging exhaust air from the inside of the vehicle, and a ventilation blower 8 And a total heat exchanger 9 for exchanging heat between fresh outside air from the vehicle and exhaust air from the vehicle interior. The total heat exchanger 9 is arranged with its longitudinal direction parallel to the motor axial direction of the ventilation fan 8, and the longitudinal end surface (fresh fresh air intake surface) of the total heat exchanger 9 is the ventilation fan 8. It is arranged so as to face the fresh outdoor air outlet. The fresh outside air outlet of the ventilation blower 8 and the fresh outside air intake surface in the longitudinal direction of the total heat exchanger 9 facing the fresh outside air outlet are connected by a duct 10. A punching plate 11 is arranged. The punching plate 11 will be described in detail later.

  On the other hand, on the fresh outside air inlet side of the ventilation blower 8, a sound absorbing material-attached shielding plate 12 to which a sound absorbing material is attached is provided in a mode substantially perpendicular to the outside air inflow direction. Thus, by providing the sound-absorbing material-equipped shielding plate 12, noise due to intake air on the fresh outside air intake side of the ventilation blower 8 is reduced.

  Further, as shown in FIG. 3, an opening 13 for communicating the exhaust air outlet of the ventilation fan 8 to the downstream side of the outdoor fan 4 is provided on the exhaust air outlet side of the ventilation fan 8. It is formed in the partition plate which partitions off a part. In this way, the exhaust air from the ventilation fan 8 is discharged from the outdoor unit side to the outside of the apparatus together with the wind from the outdoor fan 4, so that noise caused by the exhaust is reduced on the indoor unit side. Can do.

FIG. 4 is a view of the duct 10 as seen from the fresh outside air outlet of the ventilation fan 8. As shown in FIG. 4, a punching plate 11 having a plurality of holes is disposed in the duct 10 in the vicinity of the fresh outside air outlet of the ventilation blower 8 in a manner substantially orthogonal to the flow direction of the fresh outside air. Has been.
The punching plate 11 serves to diffuse fresh outside air from the ventilation blower 8 and introduce the fresh outside air as evenly as possible to a wide range of the fresh outside air intake surface of the total heat exchanger 9. By installing the punching plate 11, fresh outside air is diffused and introduced more evenly on the fresh outside air intake surface of the total heat exchanger 9, so that the length of the duct 10 can be shortened to about half of the conventional one. Therefore, the vehicle air conditioner 1 can be downsized. The local wind contact with respect to the total heat exchanger 9 is also reduced, and the breakage of the elements of the paper total heat exchanger is avoided.

The shape of the punching plate 11 is appropriately determined in accordance with the position of the fresh outside air outlet of the ventilation fan 8 and the size of the fresh outside air intake surface of the total heat exchanger 9.
As shown in FIG. 1 of the present embodiment, the fresh outside air outlet of the ventilation fan 8 is disposed opposite to one end of the fresh outside air intake surface of the longitudinal end surface of the total heat exchanger 9. As shown in FIG. 3, the punching plate 11 has a large hole space at the top and a number of small holes at the bottom (circles and squares represent holes). It has been found from repeated experiments and the like that even if the length of the duct 10 in the rail direction is shortened to about half that of the prior art, fresh outside air can be introduced almost uniformly into the fresh outside air intake surface of the total heat exchanger 9. .

  5A to 5D illustrate some of the shapes of the punching plate 11 that can be used in the present invention. In these drawings, reference numerals 11a, 11b, 11c, 11d, 11e, 11f, and 11g denote holes formed in the punching plate 11. In addition, the shape of the punching plate 11 is not limited to these examples, depending on the position of the fresh outside air outlet of the ventilation fan 8 and the size of the fresh outside air intake surface of the total heat exchanger 9, It is preferable to determine an appropriate shape as appropriate.

Next, the operation of the vehicle air conditioner 1 will be described.
Exhaust air from the inside of the vehicle is taken in from the upper part of the total heat exchanger 9 and flows from the top to the bottom in the total heat exchanger 9, where it exchanges heat with fresh outside air taken in from the ventilation blower 8, and then the ventilation blower 8 is discharged to the outside of the apparatus 1 by the outdoor blower 4 through the exhaust air outlet 8 and the opening 13.

  The return air from the vehicle is taken into the space on the fresh air outlet side of the total heat exchanger 9 where it is mixed with the fresh outside air that has passed through the total heat exchanger 9. The air-fuel mixture is conditioned by the indoor heat exchanger 7 and then sent into the vehicle by the indoor fan 5.

  During the above-described operation of the vehicle air conditioner 1, the intake noise on the fresh outside air intake side of the ventilation blower 8 is reduced more than before by the sound-absorbing material-equipped shielding plate 12. Further, since the exhaust air from the ventilation fan 8 is discharged from the outdoor unit side to the outside of the apparatus 1, intake noise at the exhaust air outlet side of the ventilation fan 8 is also reduced as compared with the conventional art.

  As an application example of the present invention, there is utilization as an air conditioning apparatus for railways mounted under the floor of a vehicle. Many devices are mounted under the floor of a railway vehicle, and it is better that the size of the device in the rail direction is as small as possible. The vehicle air conditioner of the present invention has a reduced length in the rail 10 by reducing the length of the duct 10, and is therefore suitable for application to a railway vehicle or the like where the underfloor space is limited.

The plane block diagram which looked at the air conditioning apparatus for vehicles which concerns on embodiment of this invention from the upper direction. FIG. 2 is a cross-sectional view in the AA direction of FIG. BB direction sectional drawing of FIG. The figure which looked at the duct from the fresh outdoor air blower outlet of a ventilation blower. The illustration figure of the punching board installed in a connection duct.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus, 2 Compressor, 3 Accumulator, 4 Outdoor fan, 5 Indoor fan, 6 Outdoor heat exchanger, 7 Indoor heat exchanger, 8 Ventilation fan, 9 Total heat exchanger, 10 Duct, 11 Punching plate, 12 Shielding plate with sound absorbing material, 13 openings.

Claims (3)

Heat is generated by a compressor, an outdoor heat exchanger, an outdoor fan, an indoor heat exchanger and an indoor fan, a ventilation fan that takes in fresh fresh air, fresh fresh air from the ventilator, and exhaust air from the inside of the vehicle. A vehicular air conditioner, wherein the total heat exchanger is disposed such that the longitudinal direction of the total heat exchanger faces the fresh outside air outlet of the ventilation fan,
A duct that connects the fresh outside air outlet of the ventilation fan and the fresh outside air intake surface in the longitudinal direction of the total heat exchanger facing the fresh outside air outlet;
A punching plate provided in the duct for diffusing fresh outside air from the ventilation blower to the fresh outside air intake surface of the total heat exchanger;
A vehicle air conditioner characterized by the above. The ventilation fan has an action of sending out the exhaust air in the vehicle to the outside, and the exhaust air outlet of the ventilation fan is communicated to the downstream side of the outdoor fan,
The vehicle air conditioner according to claim 1. On the fresh outside air inlet side of the ventilation fan, a shielding plate with a sound absorbing material was installed,
The vehicle air conditioner according to claim 1 or 2.

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