JP2000142096A - Air conditioning method in cabin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform humidification without using a water storage tank or the like, and to secure a window unfogged comfortable car inside space by adjusting blowoff quantity to window glass of air from the outside of a cabin, and replenishing moisture in the cabin by capturing the moisture in the air exhausted outside the cabin while circulating the air in the cabin. SOLUTION: The introduction of air from the outside of a cabin and the circulating of air in the cabin are performed by, for example, an inside/outside air two-layer unit. This inside/outside air two-layer unit is composed of an outside air suction port 1 for taking in cabin outside air, an inside air suction port 2 for taking in cabin inside air and an evaporator 3 for cooling the taken-in air to a prescribed temperature. The air introduced from the outside of the cabin is blown off to window glass from a DEF or the like by passing through an upper layer. While, the air circulating in the cabin is blown off in the cabin from a FOOT or the like by passing through a lower layer. In this case, moisture in the air exhaused outside the cabin is captured so that this is replenished in the cabin to perform air conditioning. An absorbent such as activated charcoal and zeolite is used to capture the moisture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for air-conditioning a vehicle interior, and more particularly to a method for air-conditioning a vehicle interior in a closed environment such as an automobile.

[0002]

2. Description of the Related Art In recent years, the majority of automobiles are equipped with an air conditioner to provide passengers with comfort. Normally, an air conditioner is configured by a compressor that compresses a refrigerant, a condenser that radiates heat to the outside air, an evaporator that cools the air, and the like. It is configured to be able to selectively switch between the outside air introduction mode and the outside air introduction mode to be introduced. This switching is performed alternatively. Specifically, when it is desired to take fresh air into the vehicle as much as possible, the outside air introduction mode is selected.On the other hand, when traveling in a city area and the amount of exhaust gas is large, the inside air circulation mode is selected. The switching has been performed by selecting. However, in the alternative air conditioner, if only the vehicle interior air circulation is continued for a long time, the air in the vehicle interior may be polluted by cigarette smoke or the like. Furthermore, since heating is frequently used in winter, the air in the passenger compartment may be dry and the eyes and thirsty may be degraded, and comfort may be impaired. In addition, a virus or the like may be actively activated and hurt the throat. On the other hand, if only air outside the cabin is inhaled,
In summer, a large amount of high-temperature outside air is drawn in, and the heat load imposed on the air conditioner increases. Further, if only the air outside the vehicle compartment is sucked, it may be difficult to maintain a comfortable temperature in the vehicle compartment in winter.

In order to solve such a problem, the humidity from the water storage tank is introduced together with the outside air to ventilate the air in the vehicle interior and to introduce the humidity into the room, and at the same time, the heat load does not increase so much with the ventilation. A vehicle air-conditioning method (Japanese Patent Application Laid-Open No. 58-63509) is known which can maintain the humidity in a vehicle interior at an appropriate level by circulating inside air.
According to this air-conditioning method, there is an effect that the temperature and humidity of the vehicle interior air become good, and the refreshing feeling of the blowing air is also excellent. However, such an air conditioning method requires a water storage tank. It is necessary to reclaim the space for this from the limited cabin space, and it is also necessary to supply water to the water storage tank. Furthermore, in this air-conditioning method, when the window glass in the passenger compartment becomes cloudy, there is no other method than stopping the introduction of humidification and the outside air or wiping the window glass. Therefore, while maintaining the humidity in the vehicle interior smoothly without providing a water storage tank, etc.
In addition, an air conditioning method that does not fog the window glass is desired. However, no air-conditioning method has been known so far which keeps the humidity and does not fog the window glass.

Accordingly, an object of the present invention is to provide an air-conditioning method capable of effectively utilizing a limited space in a vehicle compartment, maintaining a humidified state without using a water storage tank or the like, and providing a comfortable interior space without fogging windows. Is to provide.

[0005]

According to the air conditioning method of the present invention, while circulating the air in the vehicle interior, the amount of air blown out of the vehicle exterior to the window glass is adjusted so as to prevent fogging of the window glass. Further, at least a part of the moisture in the air discharged to the outside of the vehicle compartment is captured, and at least a part of the captured moisture is refilled into the vehicle interior.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the air conditioning method of the present invention, while circulating the air in the vehicle interior, the amount of air blown out of the vehicle interior to the window glass is adjusted so as to prevent fogging of the window glass.
In addition, air conditioning is performed by capturing at least a part of the moisture in the air discharged to the outside of the vehicle compartment and replenishing the vehicle room with at least a part of the captured moisture. Circulating the air in the vehicle cabin refers to circulating the air in the vehicle cabin through an air conditioner or the like. By adjusting the amount of air blown out of the vehicle compartment to the window glass while circulating the air in the vehicle compartment, fogging of the window glass can be prevented and a good view can be secured.

[0007] The blowing of air from outside the vehicle compartment to the window glass may be performed anywhere in the vehicle compartment. Here, the window glass means a window glass in a vehicle interior such as a windshield, a window glass on a side of an automobile, and a rear glass, and is not particularly limited. From the viewpoint of compensating stable running of the automobile, the window glass is preferably a windshield and a side window glass. Generally, an air passage of an air conditioner has an outside air intake port for taking in air outside the vehicle compartment, an inside air intake port for taking in air inside the vehicle compartment, and an intake door for selectively opening and closing both or one of the outside air intake port and the inside air intake port. And a blower that blows air introduced from the outside air suction port or the inside air suction port toward the air outlet, and an evaporator that cools the taken air to a predetermined temperature. Blowing into the window glass can be performed using an intake door that selectively opens and closes the outside air suction port and the inside air suction port. For example, by using an intake door, the air from the outside air intake port for taking in the air outside the vehicle compartment may be DEF or F
By taking the structure blown out from the ACE, it is possible to blow out to the window glass. Out of the window glass, blowing to the windshield can be performed by using DEF, and blowing to the side window glass can be performed by using FACE.

[0008] On the other hand, the circulation of the air in the passenger compartment can be performed by using an intake door to blow out the air from the inside air inlet for taking in the passenger compartment air into the FOOT or the rear FOOT.

Specifically, while circulating the air in the vehicle cabin,
A method for blowing air from outside the vehicle into the window glass will be described with reference to FIG. 1 as an example. FIG. 1 shows an overall view of a car, showing the flow of air when air is introduced from outside the cabin and the flow of air circulating in the cabin. The introduction of air from outside the vehicle compartment and the circulation of air in the vehicle compartment can be performed by, for example, a two-layer inside / outside air unit shown in FIG. The inside of the inside / outside air two-layer unit has a structure as shown in FIG. That is,
It comprises an outside air intake port 1 for taking in air outside the vehicle interior, an inside air intake port 2 for taking in air inside the vehicle interior, and an evaporator 3 for cooling the introduced air to a predetermined temperature. Air introduced from outside the vehicle passes through the upper layer and passes through DEF or F
It is possible to blow out from ACE to window glass.
On the other hand, the air circulating in the cabin passes through the lower layer and
It is possible to blow out from T or rear FOOT into the vehicle interior.

In the method of air conditioning in a vehicle compartment according to the present invention, the amount of air circulating in the vehicle compartment, the amount of air blown into the window glass and the amount of air blown into the window glass are taken into account in consideration of the temperature in the vehicle compartment, the fogging state of the window glass and the dry state of the vehicle compartment. Air conditioning is performed by appropriately changing and adjusting the amount of moisture to be replenished into the vehicle interior, which will be described later.

For example, according to the above-described example of the inside / outside air two-layer unit structure, air from outside the vehicle compartment having a low dew point can be introduced from DEF or FACE.
By taking in the air from outside the cabin to a minimum, it is possible to prevent the fogging of the window glass, prevent the temperature in the cabin from lowering, and maintain the comfort in the cabin. Considering the load on the heat exchanger and the comfort of the temperature inside the vehicle, it is not desirable to increase the amount of air blown from outside the vehicle into the window glass. This is because if the amount of air introduced from outside the vehicle compartment is large, a comfortable temperature in the vehicle compartment may not be maintained.

According to the air conditioning method of the present invention, it is possible to maintain a comfortable temperature in the vehicle interior without excessively increasing the amount of air introduced from outside the vehicle interior, and to prevent clouding of window glass. In the present invention, when the amount of air circulating in the vehicle interior is set to 1, even if the amount of air introduced from outside the vehicle interior is suppressed to 1 or less, fogging of the window glass is prevented, and comfortable interior of the vehicle interior is provided. Temperature can be maintained.

For example, the amount of air circulating in the vehicle
When the 0~400m ³ / H, can also be a blow amount of the window glass of the air from the vehicle exterior as low as 50 to 150 m ³ / H prevent fogging of the window glass. The amount of air blown from the outside of the cabin to the window glass can be appropriately set according to various conditions such as the temperature and humidity in the cabin. still,
At this time, the air discharged outside the cabin is 150 to 250 m ^3.
/ H, the amount of replenishment of captured moisture described later into the vehicle interior can be 50 to 150 m ³ / H. The amount of replenishment of the captured moisture into the vehicle interior can also be appropriately set depending on various conditions such as the temperature and humidity in the vehicle interior.

Further, in the air conditioning method of the present invention, air conditioning is performed by capturing at least a part of the humidity of the air discharged to the outside of the vehicle compartment and replenishing at least a part of the captured moisture into the vehicle interior. In the present invention, capturing the humidity of the air exhausted to the outside of the vehicle compartment and replenishing the captured moisture into the vehicle interior is performed by drying the interior of the vehicle interior due to the air in the vehicle interior containing the moisture being exhausted outside the vehicle interior. This is to prevent it. Here, the method of capturing moisture in the air is not particularly limited, but preferably can be performed by capturing moisture in the vehicle interior with an adsorbent. By using the adsorbent, much moisture in the air can be reliably captured. Examples of the adsorbent include activated carbon, zeolite, and silica gel. From the viewpoint of having excellent adsorption capacity, adsorbents are
Activated carbon or zeolite is preferred. Activated carbon, zeolite or silica gel may be used alone, or a mixture of activated carbon and zeolite, a mixture of activated carbon and silica gel, or a mixture of zeolite and silica gel may be used. Further, other than the adsorbent, an adsorbent and a substance capable of capturing moisture other than the adsorbent may be used in combination. As a substance that can adsorb moisture other than the adsorbent, for example, cardboard,
Examples include paper, cloth, nonwoven fabric, and fiber.

The adsorbent is preferably held by a medium from the viewpoint of improving the stability and reliability of the adsorbent. The shape of the medium may be any shape such as a honeycomb shape, a lattice shape, a net shape, a sponge shape as long as air can flow therethrough. For example, a honeycomb-shaped medium can be obtained by concentrically laminating a cylindrical planographic plate and a cylindrical corrugated plate. The medium is preferably provided with a rotating mechanism and is air-permeable. The mechanism for rotating the medium may be any mechanism as long as it can capture the humidity of the vehicle interior air for a certain period of time. For example, a mechanism may be used in which a driving belt is provided on the medium and the medium is slowly rotated at about 10 rph by a driving motor.
Further, a mechanism that rotates at a fixed angle such as 180 ° rotation, 90 ° rotation, or the like at regular intervals by a drive motor may be used. Further, a mechanism that rotates at a random angle according to the degree of moisture may be used.

The location for capturing the moisture of the air discharged to the outside of the vehicle compartment and the location for replenishing the moisture into the vehicle compartment are not particularly limited. However, it is preferable that the location be other than the vicinity of the windshield and the side window glass. is there. This is because, if humidification is performed in a portion other than the vicinity of the windshield and the window glass on the side surface, the effect of preventing fogging of the window glass increases. For example,
It is preferable to provide an adsorbent between a space where there is sufficient space and between the vehicle interior and the trunk room to capture and supplement moisture.

Next, a method of capturing at least a part of the moisture in the air discharged to the outside of the vehicle compartment and replenishing the captured moisture into the vehicle compartment will be described with respect to a case where activated carbon is used as an adsorbent for capturing the moisture. explain. FIG. 3 is a diagram illustrating an example of a method of capturing moisture discharged outside the vehicle compartment and replenishing the captured moisture into the vehicle compartment. The left side from the dotted line in FIG. 3 is the vehicle interior, and the right side from the dotted line is the outside of the vehicle interior. In FIG. 3, 4
Is a blower, 5 is a medium with a rotating mechanism, and 6 is a heater. The air containing moisture in the vehicle interior passes through the rotation mechanism-equipped medium 5 by the blower 4a. The rotation-medium-equipped medium 5 is driven at about 10 rp by a driving motor via a driving belt.
Rotate slowly with h. Activated carbon is provided on the surface of the rotating mechanism-equipped medium 5 as an adsorbent. When the air containing moisture in the cabin passes through the rotating mechanism-equipped medium 5 by the blower 4a, the moisture in the air in the cabin is captured by the activated carbon. The moisture-removed air is discharged as dry air out of the passenger compartment through the blower 4a. The activated carbon slowly rotates through the rotating mechanism-equipped medium 5, and the activated carbon, which has captured moisture, rotates and moves to a region where air is replenished in the vehicle compartment.

When the activated carbon moves to a region where air is replenished in the vehicle interior, the air passes through the heater 6 and is heated by the blower 4b. The heated air separates the water adsorbed on the activated carbon from the activated carbon. The air in the cabin is
This moisture is received and humidified, resulting in a comfortable humidity state. Note that silica gel or zeolite may be used instead of activated carbon.

Such a medium with a rotating mechanism is provided between the vehicle interior and the trunk room, and the air in the vehicle interior is circulated by the above-mentioned two-layer unit, and the air is blown out of the vehicle interior to the window glass. The amount was adjusted and the state of humidification was examined. As a result, while maintaining a comfortable temperature in the cabin by circulating the air in the cabin, and maintaining appropriate humidity by the humidified air returned into the cabin by the medium with the rotating mechanism, the eyes and throats are maintained. My thirst is gone. In addition, since air is introduced from outside the vehicle cabin while taking in the air circulating in the vehicle cabin, it was possible to maintain a comfortable temperature and prevent the fogging of the window glass.

An example of using the air conditioning method of the present invention will be described below.

If the air in the cabin is dry due to the dryness of the air itself or the frequent use of heating, it is necessary to humidify the cabin to prevent thirst and the like. In order to humidify the vehicle interior, in the present invention, a part of the moisture in the air discharged to the outside of the vehicle interior is captured, and the captured moisture is replenished into the vehicle interior. The amount of replenishing moisture into the vehicle interior is appropriately adjusted by the temperature of the heater, the rotation of the fan, etc., according to the humidity in the vehicle interior. Thereby, the interior of the vehicle can be kept at a favorable humidity.

In some cases, it is preferable to circulate the air in the cabin to maintain a comfortable temperature in the cabin. However, when the amount of air in the vehicle interior increases, the humidity further increases due to human respiration, evaporation of moisture from the skin, and the like. By circulating, and taking in an appropriate amount of air from the outside of the cabin and blowing it out to the window glass, air with a lower dew point than the air in the cabin can be taken into the cabin, preventing fogging of the window glass. And the temperature can be kept in a comfortable state.

[0023]

According to the present invention, it is possible to provide an air conditioning method capable of preventing clouding of windows and improving comfort in a vehicle cabin without providing a water storage tank for humidification. Further, according to the method of the present invention, since there is no need to provide a water storage tank, the labor for supplying water to the water storage tank can be omitted, and the humidity in the vehicle compartment can be maintained. further,
According to the present invention, while circulating the air in the vehicle interior, and
Since air from outside the vehicle compartment is blown out to the window glass, a comfortable temperature can be maintained in the vehicle compartment while keeping the humidity in the vehicle compartment constant.

[Brief description of the drawings]

FIG. 1 is a diagram showing a flow of air introduced from outside the vehicle compartment and air circulating in the vehicle compartment.

FIG. 2 is a diagram showing an inside / outside air two-layer unit for adjusting air inside and outside a vehicle compartment;

FIG. 3 is a diagram illustrating an example of a method of capturing moisture in air in a vehicle compartment and replenishing the captured moisture into the vehicle compartment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 outside air suction port 2 inside air suction port 3 evaporator 4 blower 5 medium with rotation mechanism 6 heater

Claims (4)

[Claims] 1. A method for controlling the amount of air blown out of a vehicle compartment to a window glass so as to prevent fogging of the window glass while circulating the air in the vehicle compartment, An air conditioning method for a vehicle interior, comprising capturing at least a part of humidity and replenishing at least a part of the captured humidity into a vehicle interior. 2. The method according to claim 1, wherein the moisture is captured by the adsorbent. 3. The method according to claim 2, wherein the adsorbent is activated carbon, zeolite or silica gel. 4. The method according to claim 2, wherein the adsorbent is held by a medium provided with a rotating mechanism.