JP2014151681A - Vehicular air conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular air conditioning device capable of preventing air-conditioned vehicle interior air from flowing out of the vehicle.SOLUTION: A vehicular air conditioning device comprises: an air conditioning device 2 which sucks in air in a space through a return air port 4 installed on a ceiling of the space, air-conditions the air and blows the same through air-conditioned wind blowoff ports 6 installed on the ceiling of the space; and circulation blowers 5 which blow a portion of the air, sucked through the return air port 4, through circulation wind blowoff ports 7 installed on the ceiling of the space without allowing the portion of the air to pass through the air conditioning device 2. The return air port 4 is installed at a center in a width direction of a vehicle. The air conditioned wind blowoff ports 6 are: installed on both sides of the width direction of the vehicle with the return air port 4 positioned in between; and formed into a slit-like shape extended toward a longitudinal direction of the vehicle. The circulation wind blowoff ports 7 are installed outside the air conditioned wind blowoff ports 6 in the width direction of the vehicle and formed into the slit-like shape along the air conditioned wind blowoff ports 6.

Description

  The present invention relates to a vehicle air conditioner that air-conditions a space inside a vehicle.

  In a conventional vehicle air conditioner, for example, an air conditioner is installed on the ceiling of the vehicle, and during cooling, air is generated by the air conditioner, through a duct into the vehicle, and through a slit provided in the ceiling, Blows cool air into the car. The air heated in the vehicle returns to the air conditioner from the return air port and becomes cold air. Compared with air conditioning in homes or offices, vehicle air conditioning frequently opens and closes doors, and heat input from windows is large, resulting in a large heat load. For this reason, in the prior art, in order to prevent the inflow of outside air from the door, there has been proposed one that prevents the inflow of outside air by providing a duct at the top of the door and blowing it out like an air curtain. (For example, refer to Patent Document 1).

JP-A-60-18970 (page 2, upper right column, line 5 to lower right column, line 7)

In a conventional vehicle air conditioner, air-conditioned interior air flows out of the vehicle by opening and closing the door. For this reason, warm air outside the vehicle blows into the vehicle during the cooling period, and cold air outside the vehicle blows into the vehicle during the heating period, which causes discomfort to the passengers. In addition, since the air-conditioned interior air flows out of the vehicle, there is a problem that electric energy is wasted.
Moreover, in the technique of patent document 1, although the air which flows in into a vehicle from outside the vehicle can be reduced by blowing the air-conditioned air by providing a duct in the upper part of the door, the conditioned air is used as an air curtain. There is a problem that electric energy is wasted because it flows out of the vehicle. In addition, there is a problem in that heat transfer through a window (for example, glass or the like) cannot be suppressed, and electric energy is wasted.

The present invention has been made to solve the above-described problems, and provides a vehicle air conditioner that can prevent air-conditioned vehicle air from flowing out of the vehicle.
Moreover, the vehicle air conditioner which can suppress the inflow of external air by opening and closing of the door of a vehicle is obtained.
Moreover, the air conditioning apparatus for vehicles which can suppress the heat transfer through a window is obtained.

  An air conditioner for a vehicle according to the present invention is an air conditioner for a vehicle that air-conditions a space inside a vehicle, sucking air in the space from a suction port provided in a ceiling of the space, Air-conditioning means that air-conditions and blows out the air from the first air outlet provided in the ceiling of the space, and a part of the air in the space sucked from the suction port without passing through the air-conditioning means, An air blower that blows out from a second air outlet provided in the ceiling of the space, the suction port is provided in the center of the width direction of the vehicle, and the first air outlet sandwiches the air inlet. The second blower outlet is formed on both sides of the vehicle in the width direction in a slit shape in the longitudinal direction of the vehicle, and the second blower outlet is located outside the first blower outlet in the width direction of the vehicle. Are formed in the shape of slits.

  This invention can suppress that the air in the air-conditioned vehicle flows out of the vehicle. Further, inflow of outside air due to opening and closing of the door of the vehicle can be suppressed. Further, heat transfer through the window can be suppressed. Therefore, it is possible to prevent the passengers in the vehicle from feeling uncomfortable and to suppress the waste of electric energy.

It is a figure which shows the structure of the vehicle air conditioner which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the air-conditioning wind blower outlet 6 and the circulation wind blower outlet 7 of the vehicle air conditioner which concerns on Embodiment 1 of this invention. It is a figure explaining the heat transfer inside and outside the vehicle of the vehicle air conditioner which concerns on Embodiment 1 of this invention. It is a figure explaining the comparative example in case there exists a difference in the blowing wind speed of the air-conditioning wind blower outlet 6 and the circulation wind blower outlet. It is a figure which shows the structure of the vehicle air conditioner which concerns on Embodiment 2 of this invention. It is a figure which shows the structure of the air-conditioning wind blower outlet 6 and the circulation wind blower outlet 7 of the vehicle air conditioner which concerns on Embodiment 2 of this invention. It is a figure which shows the structure of the air-conditioning wind blower outlet 6 and the circulation wind blower outlet 7 of the vehicle air conditioner which concerns on Embodiment 3 of this invention.

Hereinafter, a vehicle air conditioner according to the present invention will be described with reference to the drawings.
In the description of the embodiments, a vehicle air conditioner used for a railway vehicle for passengers will be described. However, the vehicle air conditioner according to the present invention includes, for example, a vehicle used for other vehicles such as a bus. An air conditioner is included. Moreover, in each figure, the same code | symbol is attached | subjected to the same member or the same part. In the drawings shown below, the configuration related to the main part of the present invention is mainly shown, and the detailed structure of the vehicle air conditioner not directly related to the main part is simplified or omitted. ing. Further, the present invention is not limited by the form of the drawings shown below.

Embodiment 1 FIG.
1 is a diagram showing a configuration of a vehicle air-conditioning apparatus according to Embodiment 1 of the present invention.
In FIG. 1, the cross section in the door part of the railway vehicle in which the vehicle air conditioner is mounted is shown. This vehicle air conditioner air-conditions the space inside the vehicle body 1 (vehicle).
As shown in FIG. 1, the vehicle air conditioner includes an air conditioner 2 and a circulation fan 5. The air conditioner 2 is installed, for example, on the ceiling (back of the ceiling) of the vehicle body 1. An indoor fan 3 is installed inside the air conditioner 2. The air conditioner 2 is connected to a return air port 4 provided on the ceiling of the vehicle body 1 by a return air duct 12. In addition, the air conditioner 2 is connected to an air-conditioning air outlet 6 provided on the ceiling of the vehicle body 1 by an air-conditioning air duct 13. The air conditioner 2 sucks air in the vehicle body 1 from the return air outlet 4 by the indoor blower 3, air-conditions this air (heating or cooling), and blows out the conditioned air from the air-conditioning air outlet 6. Although the air conditioner 2 includes a compressor and other devices, the illustration thereof is omitted.

  Circulation fan 5 is installed in the ceiling part (ceiling back) of body 1, for example. The circulation fan 5 is connected to a circulation air outlet 7 provided on the ceiling of the vehicle body 1 by a circulation air duct 14. The circulation blower 5 blows out part of the air in the vehicle body 1 sucked from the return air port 4 from the circulation air outlet 7 without passing through the air conditioner 2.

The return air port 4 is provided in the center of the vehicle body 1 in the width direction. The “center” does not necessarily mean that it is strictly the center, and it is allowed to deviate from the center as long as the air sucked from the vehicle body 1 does not deviate in the width direction of the vehicle body 1. To do.
The air-conditioning air outlet 6 is provided on both sides in the width direction of the vehicle body 1 with the return air port 4 interposed therebetween. For example, the air-conditioning air outlet 6 is provided symmetrically with respect to the center in the width direction of the vehicle body 1. The air conditioning outlet 6 is formed in a slit shape in the longitudinal direction (traveling direction) of the vehicle body 1.
The circulating air outlet 7 is formed in a slit shape along the air-conditioning air outlet 6 on the outer side in the width direction of the vehicle body 1 from the air-conditioning air outlet 6. That is, the slit shapes of the air-conditioning air outlet 6 and the circulating air outlet 7 are formed in parallel.

The air conditioner 2 corresponds to “air conditioning means” in the present invention.
The circulation fan 5 corresponds to the “air blowing means” in the present invention.
The return air port 4 corresponds to a “suction port” in the present invention.
The air-conditioning air outlet 6 corresponds to the “first outlet” in the present invention.
The circulating air outlet 7 corresponds to a “second outlet” in the present invention.

FIG. 2 is a diagram showing the structure of the air-conditioning air outlet 6 and the circulation air outlet 7 of the vehicle air conditioner according to Embodiment 1 of the present invention.
As shown in FIG. 2, an air-conditioning air outlet rectifying plate 16 that rectifies air blown from the air-conditioning air outlet 6 is provided at the tip of the air-conditioning air outlet 6.
At the tip of the circulating air outlet 7, a circulating air outlet rectifying plate 17 that rectifies the air blown out from the circulating air outlet 7 is provided.
And the air-conditioning wind outlet rectifier plate 16 and the circulation air outlet rectifier plate 17 are installed in parallel. Moreover, in this Embodiment 1, the air-conditioning wind outlet rectifier plate 16 and the circulating air outlet rectifier plate 17 are installed so that the blown-out air is directed in the vertical direction.
With such a configuration, the blown air 6a blown from the air-conditioning wind blower 6 and the blown air 7a blown from the circulating wind blower 7 are blown downward (vertically downward) in parallel.

The air-conditioning air outlet straightening plate 16 corresponds to the “first straightening plate” in the present invention.
Further, the circulation wind outlet straightening plate 17 corresponds to the “second straightening plate” in the present invention.

Next, the operation of the vehicle air conditioner according to Embodiment 1 will be described.
As shown in FIG. 1, the blown air 6 a blown from the air-conditioning wind blower 6 and the blown air 7 a blown from the circulating wind blower 7 are blown out below the vehicle body 1 in two layers.
These two layers are gradually separated toward the lower side of the vehicle body 1 and become blown air 6b, blown air 6c, blown air 7b, and blown air 7c, respectively.
That is, the air 6 a blown out from the air-conditioning air outlet 6 becomes air 6 b and 6 c that are directed toward the center of the vehicle body 1 below the vehicle body 1. The blown air 6b, 6c merges at the center and becomes a flow toward the upper side of the vehicle body 1. A part of the blown air 6b is sucked from the return air port 4, and the other part merges with the blown air 6a.
Further, the blown air 7a blown out from the circulating wind blowout port 7 becomes blown air 7b and 7c that are directed to the side surface side (door side and window side) of the vehicle body 1 below the vehicle body 1. The blown air 7b, 7c becomes an upward flow along the side wall surface. Therefore, a swirl flow 7d of a circulating wind is generated on the side surface.

Here, a state where the door 11 provided on the side surface of the vehicle body 1 is opened is considered.
In this state, the blown air 7c from the circulation wind outlet 7 is discharged from the door 11 to the outside of the vehicle. At this time, the outside air wind 8 from the outside of the vehicle body 1 is blocked by the blown air 7c, and the entry of the outside air wind 8 into the vehicle body 1 is suppressed. Further, the blown air 6b and 6c conditioned by the air conditioner 2 becomes a flow toward the center of the vehicle body 1, and the outflow of the conditioned blown air 6b and 6c to the outside of the vehicle is suppressed.

Next, the flow in the window portion without the door 11 will be described.
FIG. 3 is a view for explaining heat transfer inside and outside the vehicle of the vehicle air-conditioning apparatus according to Embodiment 1 of the present invention.
In FIG. 3, the cross section in the window part of the railway vehicle in which the vehicle air conditioner is mounted is shown.
As shown in FIG. 3, the air in the vehicle body 1 is divided into air 23 in the center of the vehicle body 1 and air 22 in the vicinity of the window side wall surface.
Also in the window portion, as described above, the blown air 6a blown out from the air-conditioning wind blowout port 6 and the blown air 7a blown out from the circulating wind blowout port 7 are blown out below the vehicle body 1 in two layers. . The blown air 7a blown out from the circulating wind blowout port 7 becomes blown air 7b and 7c directed toward the side surface side (window side) of the vehicle body 1 below the vehicle body 1 (seat portion). And the blowing air 7b, 7c becomes an upward flow along the wall surface on the window side. Therefore, a swirling flow 7d of the circulating wind is generated on the window side.

Here, the heat transfer amount 21 between the indoor air 24 and the outside air 25 will be described with reference to FIG.
This heat transfer amount 21 is proportional to the temperature difference between the indoor air 24 and the outside air 25. The indoor air 24 here is the temperature of the air 22 in the vicinity of the window side wall surface, and this temperature is closer to the outside air temperature than the temperature of the air 23 in the center of the vehicle body 1.
For example, during cooling operation, if the outside air is 33 ° C. and the temperature of the air 23 in the center of the vehicle body 1 is 28 ° C., the temperature of the air 22 near the window side wall surface is 30 ° C., for example. That is, the heat transfer amount 21 is proportional to the temperature difference of 33 ° C.-30 ° C. = 3 ° C.
On the other hand, when the swirl flow 7d is not generated on the window side as in the prior art, the air temperature in the vicinity of the window side wall surface is substantially the same as that of the central portion of the vehicle body 1. For this reason, the heat transfer amount 21 is proportional to the temperature difference of 33 ° C.−28 ° C. = 5 ° C.
In other words, by generating the swirl flow 7d on the window side by the blown air 7a that circulates without passing through the air conditioner 2, heat transfer to the outside of the vehicle through the window can be suppressed.

Next, the wind speed of the blowing air 6a and the blowing air 7a is demonstrated using FIG.3 and FIG.4.
FIG. 4 is a diagram for explaining a comparative example in the case where there is a difference in the blowing air speed between the air-conditioning air outlet 6 and the circulating air outlet 7.
For example, as shown in FIG. 4, when a speed difference is given between the wind speed of the blown air 6 a blown out from the air-conditioning wind blower outlet 6 and the wind speed of the blown air 7 a blown out from the circulating wind blower outlet 7, it is between two layers. A vortex 18 is created and the two layers cannot be kept at a long distance. Therefore, as shown in FIG. 3, it is desirable that the wind speed of the blown air 6 a blown out from the air-conditioning wind blower outlet 6 is the same as that of the blown air 7 a blown out from the circulating wind blower outlet 7. Thus, if each wind speed is the same, it can make it easy to keep two layers in a long distance after blowing.

In addition, it is good for the air volume of the blowing air 6a blown out from the air-conditioning wind blower outlet 6 to be the air volume which ensures the air volume required for in-vehicle air conditioning.
Further, it is preferable that the air volume of the blown air 7a blown out from the circulating air outlet 7 is an air volume that can maintain two layers up to the vicinity of the floor of the vehicle body 1 and can reduce the capacity of the circulating fan 5 as much as possible. That is, the air volume of the blown air 7 a blown out from the circulating air blower outlet 7 is set to be smaller than the air volume of the blown air 6 a blown out from the air-conditioning air blower outlet 6. For example, the air volume of the blown air 7a is about half of the air volume of the blown air 7a.

As described above, in the first embodiment, the air-conditioning air outlet 6 is formed in a slit shape on both sides of the vehicle in the width direction with the return air port 4 interposed therebetween, and the circulating air outlet 7 Is formed in a slit shape along the air-conditioning air outlet 6 outside the air-conditioning air outlet 6 in the width direction of the vehicle.
For this reason, in the state where the door 11 is opened, only the circulating air from the circulating air outlet 7 flows outside the vehicle, and the inflow of outside air due to the opening and closing of the door 11 can be suppressed. Further, since warm circulating air flows along the window also in the window portion, inflow or outflow of heat from the outside becomes small. Therefore, passengers and the like can be prevented from feeling uncomfortable due to the outside air wind 8, and there is an effect of suppressing waste of electric energy.

  Moreover, in this Embodiment 1, since the air-conditioning wind outlet rectifier plate 16 and the circulating air outlet rectifier plate 17 are installed in parallel, the blown air 6a and the blown air 7a are rectified and blown in parallel, Each air becomes difficult to mix, and it is easy to keep the two layers.

  Moreover, in this Embodiment 1, since the wind speed of the air which blows off from the air-conditioning wind blower outlet 6 and the wind speed of the air which blows off from the circulation wind blower outlet 7 are the same, two layers are maintained in the long distance after blowing. Can be made easier.

Embodiment 2. FIG.
FIG. 5 is a diagram showing a configuration of a vehicle air conditioner according to Embodiment 2 of the present invention.
FIG. 6 is a diagram showing the structure of the air-conditioning air outlet 6 and the circulation air outlet 7 of the vehicle air conditioner according to Embodiment 2 of the present invention.
As shown in FIGS. 5 and 6, the air-conditioning wind outlet rectifier plate 16 and the circulation air outlet outlet rectifier plate 17 according to the second embodiment are configured so that the air to be blown is directed to the outside of the vehicle body 1 from the vertical direction. The vehicle body 1 is installed inclined with respect to the side surface (wall side). Moreover, the air-conditioning wind outlet rectifying plate 16 and the circulating air outlet rectifying plate 17 are inclined at the same angle toward the wall side.
Other configurations are the same as those of the first embodiment, and the same reference numerals are given to the same portions.

Next, the operation of the vehicle air conditioner according to Embodiment 2 will be described.
In the second embodiment, the airflow blowout outlet straightening plate 16 and the circulating air blowout outlet straightening plate 17 are provided with an angle in the window side direction, so that two layers of parallel flows flow to the window side. At this time, the swirl flow 7d formed by the blown air 7b and 7c flowing to the window side is thinly present in the vicinity of the window side wall surface.
For this reason, the area | region of the blowing air 6a, 6b, 6c air-conditioned with the air conditioner 2 becomes large compared with the said Embodiment 1. FIG. Therefore, in addition to the effect of the first embodiment, the comfort in the vehicle body 1 can be further improved.

Embodiment 3 FIG.
FIG. 7 is a diagram showing the structure of the air-conditioning air outlet 6 and the circulating air outlet 7 of the vehicle air conditioner according to Embodiment 3 of the present invention.
As shown in FIG. 7, in addition to the configuration of the first embodiment, the vehicle air conditioner according to the third embodiment includes a link mechanism 31 that variably drives the inclination of the air-conditioning wind outlet rectifier plate 16, and a circulation And a link mechanism 33 that variably drives the inclination of the air outlet rectifying plate 17. The link mechanisms 31 and 33 variably drive the inclination of the air-conditioning air outlet rectifier plate 16 and the circulation air outlet rectifier plate 17 to the same angle. The link mechanisms 31 and 33 may be driven by, for example, a drive motor provided by automatic control or angle setting operation from a control device or the like, or may be driven manually.
Other configurations are the same as those of the first embodiment, and the same reference numerals are given to the same portions.

Next, the operation of the vehicle air conditioner according to Embodiment 3 will be described.
As described in the second embodiment, the air-conditioned area can be widened by blowing the blown air 6a, 7a at an angle in the window side direction, but the flow of the swirl flow 7d generated on the window side wall surface is as follows. Depending on the number of passengers in the vehicle body 1, etc.
Therefore, by making the angles of the air-conditioning air outlet rectifying plate 16 and the circulating air outlet rectifying plate 17 variable, it is possible to make adjustments corresponding to changes in the air flow depending on the number of passengers. For example, when the number of passengers is large and the blown air 7b, 7c hits the passengers and becomes a turbulent flow, the inclination angle of the air-conditioning wind outlet rectifying plate 16 and the circulation air outlet rectifying plate 17 is increased, and the window side The swirling flow 7d can be generated at a position higher than that of the passenger while widening the air-conditioned area.

  DESCRIPTION OF SYMBOLS 1 Car body, 2 Air conditioner, 3 Indoor fan, 4 Return air outlet, 5 Circulating fan, 6 Air-conditioning wind outlet, 6a, 6b, 6c Blowing air, 7 Circulating wind outlet, 7a, 7b, 7c Blowing air, 7d Swirling flow, 8 Outside air, 11 Door, 12 Return air duct, 13 Air-conditioning air duct, 14 Circulating air duct, 16 Air-conditioning air outlet rectifier, 17 Circulating air outlet rectifier, 18 Vortex, 21 Heat transfer amount, 22 Air, 23 Air, 24 Indoor air, 25 Outside air, 31 Link mechanism, 33 Link mechanism.

Claims (7)

A vehicle air conditioner that air-conditions a space inside a vehicle,
Air conditioning means for sucking air in the space from a suction port provided in the ceiling of the space, air-conditioning the air, and blowing out the air from a first air outlet provided in the ceiling of the space;
A blowing means for blowing out part of the air in the space sucked from the suction port from a second air outlet provided in the ceiling of the space without passing through the air conditioning means;
With
The suction port is provided in the center in the width direction of the vehicle,
The first air outlet is formed in a slit shape in the longitudinal direction of the vehicle on both sides of the vehicle in the width direction across the suction port,
The air conditioner for vehicles, wherein the second air outlet is formed in a slit shape along the first air outlet, outside the first air outlet in the width direction of the vehicle. 2. The vehicle air conditioner according to claim 1, wherein a wind speed of air blown from the first air outlet and a wind speed of air blown from the second air outlet are the same. 3. The vehicle air conditioner according to claim 1, wherein an air volume of air blown from the second air outlet is smaller than an air volume of air blown from the first air outlet. 4. A first rectifying plate that rectifies air blown from the first air outlet;
A second rectifying plate that rectifies the air blown from the second air outlet;
With
The vehicle air conditioner according to any one of claims 1 to 3, wherein the first rectifying plate and the second rectifying plate are installed in parallel. 5. The vehicle air conditioner according to claim 4, wherein the first rectifying plate and the second rectifying plate are installed so that the blown air is directed in a vertical direction. The first rectifying plate and the second rectifying plate are installed to be inclined with respect to a side surface of the vehicle so that air blown out is directed to the outside of the vehicle from a vertical direction. Item 5. The vehicle air conditioner according to Item 4. The vehicle air conditioner according to claim 6, further comprising a link mechanism that variably drives the inclination of the first rectifying plate and the second rectifying plate to the same angle.

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