JP2000071751A - Vehicle air ventilation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use the reaction of pressure inside a vehicle cabin in a sealed/closed state with the windows closed, circulate the air within the cabin and lead it to an inside air exhaust outlet of a total enthalpy heat exchanger, and maintain high heat exchange efficiency while reducing the weight and size of the vehicle air ventilation system. SOLUTION: Outside air is introduced to an outside air inlet 22a via an outside air introduction fan 22b. The outside air then flows into a passage of a total enthalpy heat exchanger 2 via an outside air introduction passage 22 and is supplied to the cabin through an outside air supply passage 23. At this time, the pressure within the cabin rises so that air inside the cabin is forced toward the cabin inner exhaust outlet 24a and flows through a separate passage of the total enthalpy heat exchanger 2 via an inside air introduction passage 24, so as to lower the pressure within the cabin. Here, total enthalpy heat exchange takes place with the exchange of sensible heat and latent heat of the outside air flowing through one of the passages and the inside air flowing through the other passage. Then, the outside air is sent to the cabin inner supply air opening 23a of the outside air supply passage 23 and supplied to the cabin. The inside air is send to the cabin outer discharge opening 25a of an inner air discharge passage 25 and discharged into the trunk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle ventilation system, and more particularly to a vehicle ventilation system which is lightweight and compact while maintaining high heat exchange efficiency.

[0002]

2. Description of the Related Art Conventionally, in order to purify or ventilate air in a vehicle cabin, an air purifier is provided behind a rear seat of a vehicle or on a ceiling. This air purifier is a filter in the purifier that collects cigarette smoke and dust while circulating the air in the vehicle with a fan, so it is necessary to periodically replace the filter. In addition, there is a disadvantage that the temperature and humidity in the vehicle compartment cannot be adjusted.

[0003] Therefore, it has been proposed to use a total heat exchanger as a vehicle ventilation device (for example, Japanese Patent Laid-Open No. Sho 57-157).
-51510, JP-A-57-80912,
See JP-A-2-274613. Unlike a sensible heat exchanger that exchanges only sensible heat, this total heat exchanger is a heat exchanger unique to air conditioning that can simultaneously exchange sensible heat and latent heat of air inside and outside the vehicle cabin. When the exchanger is used as an air ventilator in a vehicle cabin, it is possible to exhaust only cigarette smoke while maintaining the air condition in the vehicle cabin adjusted to an appropriate temperature and humidity.

[0004]

However, in the conventional vehicle ventilation system having the above-mentioned total heat exchanger, "for air supply" for supplying outside air to the room from the outside and room air to the outside from the room. Each fan is provided as an “exhaust air” for performing the air exhaust, and by driving the two fans, the air inside and outside the room is ventilated. Although it is preferable in that quick ventilation is possible by driving the two fans, it is disadvantageous in that the weight and size of the main body of the vehicle ventilation device are increased. Therefore, there may be a case where it is difficult to mount on a vehicle ventilation device for which a lighter and smaller size is desired.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems of the related art, and has as its object to provide a vehicle ventilation device that is lightweight and small while maintaining high heat exchange efficiency. .

[0006]

Conventionally, a vehicle ventilation system having a total heat exchanger requires at least two fans, an air supply fan for introducing outside air and an exhaust fan for introducing inside air. The inventor believed that when the interior of the vehicle was closed, the inside of the vehicle was substantially closed, and when outside air was introduced from outside to increase the pressure in the interior of the vehicle, this reaction caused a pressure to the outside of the vehicle due to this reaction. Focusing on this fact, the present inventors have found that it is possible to circulate the air in the vehicle cabin by utilizing the reaction of the pressure in the vehicle cabin and to guide the air to the inside air exhaust port of the total heat exchanger, thereby completing the present invention. Was.

That is, the present invention provides an outside air inlet (22)
a) In a vehicle ventilation system (20) having a total heat exchanger (2) for exchanging total heat between outside air introduced from a) and inside air introduced from an indoor exhaust port (24a), the outside air introduction port (22a) is connected to the outside air introduction port (22a). Only one fan (outside air introduction fan (22
b)) is provided.

The vehicle ventilation device (20) of the present invention has only one fan (outside air introduction fan (22b)) as a whole of the vehicle ventilation device (20). Compared to a ventilator, the entire device can be reduced in weight and size.

Preferably, the vehicle ventilation device (20) includes an air conditioner (5) having a second outside air inlet (52) different from the outside air inlet (22a).

In particular, when it is desired to quickly ventilate this cigarette smoke after smoking in the vehicle interior, the vehicle travels from the second outside air inlet (52) of the air conditioner (5) provided at the front of the vehicle. By introducing the outside air using the ram pressure in the inside, the pressure in the vehicle interior further increases, so that the circulation of the air in the vehicle interior is promoted accordingly. As a result, for example, a total heat exchanger provided at the rear of the vehicle The inside air exhaust port (24) of (2)
The inside air can be quickly guided to a), and the ventilation inside and outside the vehicle compartment is further accelerated.

It is preferable that the second outside air inlet (52) is opened in front of the vehicle compartment, and the total heat exchanger (2) is provided behind the vehicle compartment.

By thus opening the second outside air inlet (52) in front of the vehicle compartment, the second outside air inlet (52) can be opened only by opening the second outside air inlet (52) during running of the vehicle. An air flow can be formed toward the rear, and as a result, smooth ventilation inside and outside the vehicle can be achieved.

[0013]

Embodiments of the present invention will be described below.

First Embodiment FIG. 1 is a schematic perspective view showing an embodiment of a vehicle ventilation device (only a total heat exchange unit) according to the present embodiment, and FIG. 2 shows a case where the vehicle ventilation device of FIG. 1 is mounted on a vehicle. FIG. 3 is an overall perspective view showing one embodiment of a total heat exchanger used in the vehicle ventilation device of FIG. 1, and FIG. 4 is a view showing the total heat exchanger of FIG. FIG. 5 is a perspective view showing another embodiment of the frame constituting the total heat exchanger of FIG. 4, and FIG. 6 is a perspective view showing another embodiment of the frame constituting the total heat exchanger of FIG. FIG. 7 is a schematic perspective view showing another embodiment in which the vehicle ventilation device of FIG. 6 is mounted on a vehicle, and FIG. 8 is a vehicle ventilation of FIG. FIG. 3 is a schematic diagram showing the flow of air when the device is mounted on a vehicle and driven.

As shown in FIG. 1, the vehicle ventilator 20 of this embodiment includes a total heat exchanger 2, an outside air introduction passage 22 connected to a group A of intake ports of the total heat exchanger 2, and Outside air supply passage 23 connected to supply port group B of total heat exchanger 2
And an inside air introduction passage 24 connected to the outlet group C of the total heat exchanger 2, and an inside air discharge passage 25 connected to the outlet group D of the total heat exchanger 2. .

An outside air introduction port 22a is provided on the outside air introduction side of the outside air introduction passage 22, and an outside air introduction fan 22b for introducing outside air into the outside air introduction port 22a is provided inside the outside air introduction port 22a. The external air introduced from the external air introduction port 22a can be introduced into the inlet group A of the total heat exchanger 2.

The outside air supply passage 23 has an indoor air supply port 23a.
Is provided, and it is possible to supply the outside air subjected to total heat exchange, which will be described later, from the indoor supply port 23a.

The inside air introduction passage 24 has a room exhaust port 24a.
Is provided, and the indoor air can be exhausted from the indoor exhaust port 24a. In addition, this indoor exhaust port 24a
Has no fan inside.

The inside air discharge passage 25 has an outdoor exhaust port 25a.
Is provided, and the inside air subjected to the total heat exchange described later can be discharged from the outdoor exhaust port 25a.

Such a vehicle ventilation device 20 is installed near the rear seat (rear parcel) of the rear seat of the vehicle, as shown in FIG. 2, for example. Specifically, the outside air introduction port 22a of the outside air introduction passage 22 and the outdoor exhaust port 25a of the inside air discharge passage 25 are arranged such that the former faces the outside of the vehicle compartment (for example, a pillar portion of the vehicle) and the latter is the trunk room of the vehicle. , The indoor air supply port 23a of the outside air supply passage 23 and the indoor exhaust port 24a of the inside air introduction passage 24 both face the vehicle interior.

The total heat exchanger 2 is of a stationary cross-flow type (intersecting the flow direction of the outside air from the outside to the room with the flow direction of the air from the room to the outside, and exchanging heat at the intersection. A typical example is a total heat exchanger in which a plurality of corrugated fins that regulate the flow of outside air or indoor air are alternately stacked with a total heat exchange element interposed therebetween) or a counter-flow type total heat exchanger Is appropriately used. In particular, it is preferable to use a counterflow type total heat exchanger because of its excellent heat exchange efficiency. As such a counter-flow type total heat exchanger, for example, a total heat exchanger 2a as shown in FIG. 3 can be used.

As shown in FIG. 3, the counter-flow type total heat exchanger 2a according to the present embodiment is configured by alternately stacking the frame 3 and the total heat exchange element 6 respectively.

The frame 3 has a substrate 4. The substrate 4 has a pair of wall surfaces 41b, 41b, one end of which serves as the gas inlet 43, and the other end serves as the gas outlet 44. A substantially S-shaped hole 41a is formed.
By stacking a total heat exchange element 6 described later on each of the front and back surfaces of the frame 3, the gas (for example, outside air) introduced from the suction port 43 passes through the first passage 41 and is discharged to the exhaust port (for example, , Indoor side) 44.

The intake port 43 and the exhaust port 44 are structured such that both sides are reinforced to prevent the intake port 43 and the exhaust port 44 from being crushed when a plurality of frames 3 are stacked. It has become. The intake port 43 and the exhaust port 44 may be integrally formed of the same material as the material forming the frame 3, but as shown in FIG. The bar 48 made of a material such as iron or steel may be provided facing the side edge along the longitudinal direction of the substrate 4 by inserting the bar 4 after molding the frame 3 main body. By using the intake port 43 and the exhaust port 44 as described above, when the total heat exchanger 2a is used as the total heat exchanger 2 of the vehicle ventilation device 20, a work of attaching a duct or the like to the intake port 43 and the exhaust port 44 is performed. There is an advantage that the performance is improved. Furthermore, it is provided that the direction of gas suction into the suction port 43 and the direction of gas discharge from the exhaust port 44 are substantially perpendicular and opposite to the longitudinal direction of the frame 3. desirable. Total heat exchanger 2
This is because the convenience of a is improved.

The frame 3 has a first passage 41 formed by a hole 41a when viewed from one main surface side of the substrate 4 (for example, the direction of arrow A in FIG. 3), and the other main surface. The hole 41a when viewed from the side (for example, the direction of arrow B in FIG. 3) forms the second passage 42.
The width of the first passage 41 or the second passage 42 may be the same at any point.
Preferably, the width of the curved portion is provided to be wider than the width of the straight portion. With such a passage width, the cross-sectional area of the passage in the curved portion is increased, and an increase in the ventilation resistance can be suppressed. In addition, the first passage 41 and the second passage 42
Therefore, further improvement of heat exchange efficiency can be expected. The material of the frame 3 is not particularly limited, and is usually made of a synthetic resin or the like.

As shown in FIG. 5, the hole 41a is preferably provided with a plurality of ribs 411a along the flow direction of the gas. These ribs 411a
Is provided, the strength of the entire frame body 3 is improved, and the total heat exchange element 6 can be held by using the rib 411a. Therefore, an increase in the ventilation resistance due to the looseness of the total heat exchange element 6 can be suppressed. The shape of the rib 411a is not particularly limited. In short, any shape may be used as long as the strength of the frame 3 can be reinforced and the total heat exchange element 6 can be sandwiched. The material of the rib 411a is not particularly limited, and is made of a synthetic resin or the like, similarly to the frame 3.

The frame 3 has a convex portion (not shown) provided at an arbitrary position on the front surface thereof and a concave portion (not shown) provided at an arbitrary position on the rear surface thereof. Adjacent frames 3, 3 can be connected to each other with a hole 61 provided at an arbitrary position therebetween.
By providing such convex portions and concave portions, it is possible to effectively prevent the occurrence of misalignment between the frame 3 and the total heat exchange element 6 during or after use thereof. The frame 3
The same effect can be obtained by interposing an adhesive at a contact portion between the heat exchange element 6 and the heat exchange element 6, or both may be used in combination.

As shown in FIG. 4, at both ends in the longitudinal direction of the substrate 4, there are provided engagement pairs 46 and 47 provided so that one part is engaged with the other part. Is preferred. By providing such an engagement pair, a plurality of frame bodies 3 can be arranged in series, so that a plurality of total heat exchangers 2a can be used in series (see FIGS. 6 and 7). As shown in FIGS. 6 and 7, two total heat exchangers 2a, 2a and 2 are used by one external air inlet 22a (that is, one external air introduction fan 22b).
The outside air can be simultaneously fed into a, the ventilation resistance can be reduced, and the heat exchange efficiency can be improved, and the airflow in the vehicle is further smoothed.

In FIGS. 6 and 7, the total heat exchanger 2a
Are connected, but three or more total heat exchangers 2 may be connected in series.

Then, as shown in FIG.
In a portion of the substrate 4 corresponding to the hole 41a of the first passage 41, the total heat exchange element 6 is stacked so as to close the hole 41a.

The total heat exchange element 6 plays a role of exchanging sensible heat and latent heat between, for example, the outside air and the inside air, and its material and structure are not particularly limited. It is constituted by impregnating a certain material with a hydrophilic resin and other flame-retardant chemicals.

As shown in FIG. 3, the total heat exchanger 2a according to the present embodiment comprises a frame 3 and a total heat exchange element 6 that closes the hole 41a on at least one of the main surfaces of the substrate 4. The first passage 41 and the second passage 42 are arranged in this order (the order of front and back).
And a plurality of sheets are laminated so as to be alternately overlapped. The number of stacked layers is appropriately determined as needed. The stacking order may be the order of the second passage 42 and the first passage 41 (the order of the front and back), and the layers may be sequentially and repeatedly stacked.

As described above, the frame body 3 is laminated together with the total heat exchange element 6, so that the first
A set of intake ports A and a set of exhaust ports B of the passage 41;
Inlet group C and outlet group D of the second passage 42
Are configured.

The vehicle ventilation device 20 according to the present embodiment is configured as described above, and has only one fan (outside air introduction fan 22b) in the whole system, so that the whole system can be reduced in weight and size. It is convenient when mounted on a vehicle. Further, the total heat exchanger 2a having the above-described special configuration (see FIG. 3).
Is used, it is possible to further improve the heat exchange efficiency as compared with a conventional total heat exchanger, particularly a conventional counter-flow total heat exchanger.

In the present invention, the vehicle ventilator 20 can be driven even with a single fan because the air in the box is pushed back as a reaction when air is blown into the closed box. This is because it uses the same principle as that used. In other words, a vehicle with a window closed is usually
It is in a closed state, and the outside air is blown into the room to increase the pressure in the vehicle room.
While passing through the exhaust port group C of the total heat exchanger 2 and discharging from the outdoor discharge port 25a.

As described above, the vehicle ventilation device 20 can be driven by one fan, and it is possible to provide the vehicle ventilation device 20 in which the heat exchange efficiency is further improved as a whole.

6 and 7, the two total heat exchangers 2 can be driven simultaneously by one outside air introduction fan 22b, so that the heat exchange efficiency is further improved. And the airflow resistance in the vehicle can be further smoothed.

Next, the operation of the vehicle ventilator 20 having the above-structured total heat exchanger 2 will be described with reference to FIGS.

First, air (outside air) is introduced into the outside air inlet 22a from the outside of the cabin (for example, a pillar portion) of the vehicle by an outside air introduction fan 22b. Through the first heat exchanger 2
Reaches the inlet group A of the gas passage 41 of the first passage 4
Flow 1 Then, the air passes through the air inlet group B of the total heat exchanger 2 and is supplied into the room from the outside air supply passage 23 facing the vehicle interior. Then, since the pressure in the vehicle compartment, which was constant until then, rises, the interior air in the vehicle interior is directed to the interior exhaust port 24a in order to lower the pressure, and the interior air in the vehicle interior passes through the interior air introduction passage 24 soon. As a result, the exhaust gas reaches the group C of exhaust ports of the total heat exchanger 2 and flows through the second passage 42 (see FIG. 8).

At this time, the first heat exchanger 2,
The frame 3 having the passage 41 and the frame 3 having the second passage 42 have common portions in the holes 41a and 42a (that is, the portions penetrate even if a plurality of the frames 3 are stacked). ), And at least the total heat exchange element 6 is provided in this common portion, so that the outside air flowing through the first passage 41 one after another through the total heat exchange element 6 and the inside of the vehicle interior The inside air flowing through the second passage 42, which is successively pushed back to lower the pressure, exchanges sensible heat and latent heat with each other, and total heat exchange is performed.

Here, in the total heat exchanger 2 according to the present embodiment, a plurality of specific frames 3 are alternately stacked in the order of the first passage 41 and the second passage 42 or in the reverse order. With such a configuration, it is possible to obtain high heat exchange efficiency.

After completion of the total heat exchange, the first passage 4
The outside air flowing through 1 passes through the air supply port group B, reaches the indoor air supply port 23a of the outside air supply passage 23, and is supplied into the room. On the other hand, the inside air flowing through the second passage 42 passes through the outlet group D, reaches the outdoor discharge port 25a of the inside air discharge passage 25, and is discharged into the trunk room. By repeating such an operation, indoor and outdoor air is continuously ventilated.

Second Embodiment FIG. 9 is a schematic view showing the flow of air when the vehicle ventilation system shown in FIG. 6 is mounted on a vehicle and driven.

The vehicle ventilator 20 according to the present embodiment includes a total heat exchanger 2 located at the rear of the vehicle and an air conditioner 5 having a second outside air inlet 52 provided at the cowl portion at the front of the vehicle 90. It is comprised including.

If the air conditioner 5 has a second outside air inlet 52 through which outside air can be introduced into the room,
Any one may be used.

The second outside air inlet 52 may be replaced with, for example, an outside air inlet of an air conditioner for adjusting the temperature and humidity in the vehicle compartment.

As the total heat exchanger 2, the same one as in the first embodiment is used.

According to the vehicle ventilation device 20 of the second embodiment having such a configuration, particularly, when smoking in the vehicle interior, it is possible to suitably respond to a request to quickly ventilate the tobacco smoke filled in the interior. be able to. That is, by opening the second outside air inlet 52 while the vehicle is running, outside air is introduced into the room from the second outside air inlet 52 and the outside air of the total heat exchanger 2 located at the rear portion of the vehicle is opened. The outside air introduction fan 22b at the introduction port 22a is driven to introduce outside air from the outside of the vehicle compartment (for example, a pillar portion). Then, since the pressure in the vehicle interior further increases, the internal air in the vehicle interior is further circulated, and the internal air exhaust port 24a
The inside air guided to is exhausted through the outdoor outlet 25a after the total heat exchange. In this way, it is possible to quickly ventilate the tobacco smoke in the vehicle interior after smoking.

As shown in FIG. 9, the second outside air inlet 52 is opened in front of the vehicle compartment, and the total heat exchanger 2 is provided behind the vehicle compartment. The air flow from the front to the rear of the vehicle compartment can be formed only by opening the second outside air inlet 52, and as a result, smooth ventilation inside and outside the vehicle compartment becomes possible.

The embodiments described above are described to facilitate understanding of the present invention, but are not described to limit the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

[0051]

As described above, according to the present invention, there is provided a vehicle ventilation system having high heat exchange efficiency, light weight and small size.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing one embodiment of a vehicle ventilation device (only a total heat exchange unit) according to the present embodiment.

FIG. 2 is a schematic perspective view showing one embodiment when the vehicle ventilation device of FIG. 1 is mounted on a vehicle.

FIG. 3 is an overall perspective view showing one embodiment of a total heat exchanger used in the vehicle ventilation device of FIG. 1;

FIG. 4 is a perspective view showing another embodiment of the frame constituting the total heat exchanger of FIG. 3;

FIG. 5 is a perspective view showing another embodiment of the frame constituting the total heat exchanger of FIG. 4;

FIG. 6 is a schematic perspective view showing another embodiment of the vehicle ventilation device (only the total heat exchange unit) according to the present embodiment.

FIG. 7 is a schematic perspective view showing one embodiment when the vehicle ventilation device of FIG. 6 is mounted on a vehicle.

FIG. 8 is a schematic diagram showing the flow of air when the vehicle ventilation device of FIG. 1 is mounted on a vehicle and driven.

FIG. 9 is a schematic diagram showing the flow of air when the vehicle ventilation device of FIG. 6 is mounted on a vehicle and driven.

[Description of sign]

 2 ... Total heat exchanger 3 ... Frame 4 ... Substrate 41 ... First passage 41a, 42a ... Hole 411a ... Rib 41b, 42b ... Wall surface 42 ... Second passage 43 ... Inlet 44 ... Outlet 46, 47 ... Engagement pair 48 Crosspiece 5 Air conditioner 52 Second outside air inlet 6 Total heat exchange element 7 Unit member 8 Hinge 10 Unit frame 20 Vehicle ventilation device 22 Outdoor air introduction passage 22a Outdoor air introduction Outlet 22b ... outside air introduction fan 23 ... outside air supply passage 23a ... indoor air supply passage 24 ... inside air introduction passage 24a ... indoor exhaust outlet 25 ... inside air discharge passage 25a ... outdoor exhaust outlet

Claims (3)

[Claims] 1. A vehicle ventilation system having a total heat exchanger for exchanging total heat between outside air introduced from an outside air introduction port and inside air introduced from an indoor exhaust port, wherein one fan is provided only in the outside air introduction port. A vehicle ventilation device characterized by being used. 2. An air conditioner having a second outside air inlet different from the outside air inlet.
A vehicle ventilation device according to claim 1. 3. The vehicle ventilation system according to claim 2, wherein the second outside air inlet is opened in front of a vehicle room, and the total heat exchanger is provided behind the vehicle room. .