JP2000203256A - Air conditioner for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save an operation time for a compressor, and to save an energy consumption. SOLUTION: In this air conditioner for an automobile, the first ventilation passage 10 for connecting a first suction port 11 to a first exhaust port 12, and a second ventilation passage 20 for connecting a second suction port 21 to a second exhaust port 22 are provided, a cooling means 30 for cooling an ventilation and a moisture absorbing member 50 movable between the first ventilation passage 10 and the second ventilation passage 20 are arranged in series inside the first ventilation passage 10, a heating means 40 for heating the ventilation and the moisture absorbing member 50 movable between the passage 10 and the passage 20 are arranged in series inside the second ventilation passage 20. The cooling means 30 has a function for reserving cold, in the air conditioner of the present invention.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner.

[0002]

2. Description of the Related Art A conventional air conditioning system for an automobile is performed by moving a compressor by an engine driving force during cooling, and requires a large amount of energy. Most of this energy is consumed for dehumidifying air (outside air).

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and has as its object to save energy consumption of an air conditioning system. In particular, it is intended to save labor by restricting the operation time of the compressor.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a first ventilation path connecting a first intake port and a first exhaust port, a second intake port and a second ventilation port. A second ventilation path connecting the exhaust ports, wherein a cooling means for cooling the ventilation and a moisture absorbing member movable between the first ventilation path and the second ventilation path are provided in the first ventilation path. Are arranged in series and in the second ventilation path,
In an automotive air conditioner in which a heating means for heating the ventilation and a moisture absorbing member movable between the first ventilation path and the second ventilation path are arranged in series, the cooling means has a function of storing cold heat. Features.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vehicle air conditioner according to an embodiment of the present invention. First, the configuration and operation of an embodiment of an automotive air conditioner according to the present invention will be described with reference to the configuration diagram of FIG.

In the air conditioner according to the present invention, air taken in from the inside or outside of the car passes through the first intake port 11 of the first ventilation passage 10, is cooled by the heat absorbing means 30, and is cooled at low temperature and high humidity. The air is led to the moisture absorbing member 50 and dehumidified to become low-temperature / low-humidity air. In addition, as shown in FIG.
Heating / humidifying means 60 for adjusting low-temperature / low-humidity air to a desired temperature / humidity may be provided after the first exhaust port 12.

On the other hand, air taken in from outside the vehicle passes through the second intake port 21 of the second ventilation path 20 and
, And becomes high-temperature air, which is guided to the moisture absorbing member 50. This high-temperature air heats and dries the moisture absorbing member 50. The high-temperature and high-humidity air obtained by drying the moisture absorbing member 50 is discharged from the second exhaust port 22 to the outside of the vehicle. At this time, although not shown, it may be used to adjust the low-temperature and low-humidity air to a predetermined temperature and humidity.

In the first ventilation passage 10, the moisture absorbing member 50
By dehumidifying the air by absorbing moisture by itself, the second ventilation path 20
Is heated and releases itself. Here, the moisture absorbing member 50
Can be moved between the first ventilation path 10 and the second ventilation path 20, so that the moisture absorbing member 50 that has absorbed moisture in the first ventilation path 10 can be regenerated in the second ventilation path 20. Can be.

Next, each element in the air conditioner of the present embodiment will be described. (1) Ventilation paths Resin pipes can be suitably used for the ventilation paths 10 and 20 in FIG. Heat absorbing means 30 installed in the ventilation path;
In order to accommodate the heating means 40 and the moisture absorbing member 50,
A function as a housing can be provided.

(2) Heat Absorbing Means As shown in FIG. 3, the heat absorbing means 30 shown in FIG. 1 is a container 31 for enclosing a heat storage agent 33 having water repellency and having a melting point of 15 ° C. or less.
And a radiating fin portion 32 conforming to the cross-sectional shape of the first ventilation passage 10. The container 31 is provided with a refrigerant passage 34 through which the refrigerant cooled by the evaporator can pass through the heat storage agent 33.

Here, the shape of the container 31 is not particularly limited, but as shown in FIG.
It is preferable to have the same cross-sectional shape as that of the apparatus in view of miniaturization of the equipment. The surface of the container 31 preferably has water repellency in order to prevent icing, and for example, Teflon resin can be suitably used.

The radiating fin portion 32 preferably has a shape that matches the cross-sectional shape of the first ventilation passage 10 in order to reduce airflow resistance and increase the efficiency of heat exchange between the air and the heat storage agent 33. For example, if the cross section of the first ventilation path 10 is circular, a semicircular shape as shown in FIG. 3 is preferable.

As the heat storage agent 33 contained in the container 31, a heat storage agent having a melting point of 15 ° C. or less can be used. A heat storage agent having a melting point higher than this does not serve to cool the air passing through the heat absorbing means 30. As the heat storage agent 33, water, aluminum sulfate hydrate, sodium sulfate hydrate, calcium chloride hydrate, calcium bromide hydrate, paraffin, and a mixture thereof can be used.

By storing the cold heat in the heat storage agent 33 in this manner, it is not necessary to use a constantly cooled refrigerant for cooling the air, so that the operation time of the compressor can be saved, and the energy saving of the whole vehicle can be saved. it can.

(3) Moisture Absorbing Member The moisture absorbing member 50 in FIG. 1 performs dehumidification in the first ventilation passage 10 and is regenerated in the second ventilation passage 20, and passes through the first ventilation passage 10. It continuously dehumidifies air.

The shape of the moisture absorbing member 50 is the first ventilation passage 10.
The second ventilation passage 20 and the second ventilation passage 20 are not particularly limited as long as they can move in a continuous calendar and are breathable. A substantially disk-like shape capable of continuously moving 20 can be suitably used.

Further, from the viewpoint of miniaturization of the equipment, FIG.
As shown in (a), it is preferable that the moisture absorbing member 50 has a moisture absorbing material 51 and a rotation mechanism 52 provided at the center of the member disk, and can move between the first ventilation path 10 and the second ventilation path 20. In addition, a configuration as shown in FIG.

The moisture absorbent 51 is made of silica gel, zeolite,
Sepiolite, activated alumina, and lithium chloride can be used, but are not limited to the above.

(4) Heating Means The heating means 40 of FIG. 1 has a hot water passage 44 through which hot water can pass through the container 41, as shown in FIG. Here, the shape of the container 41 is not particularly limited, but as shown in FIG. 5, a radiation fin portion in which a large number of fins are connected to reduce the ventilation resistance and increase the heat exchange efficiency between the air and the container 41. It is preferable to take the form having 42. Further, as the hot water, engine cooling water can be suitably used.

Hereinafter, embodiments of an air conditioner for a vehicle according to the present invention will be specifically described with reference to examples.

(Embodiment 1) Embodiment 1 will be described using the air conditioner shown in FIG. In FIG. 6, the first ventilation path 10 and the second ventilation path 20 are each a pipe made of polycarbonate resin having a diameter of 150 mm. The heat absorbing means 30 is provided with a radiating fin part 32 made of aluminum and has a flow rate of 3 L / min.
It is provided with a refrigerant passage 34 through which a refrigerant at 0 ° C. passes, and 8 kg of calcium chloride hydrate is sealed in a Teflon container 31. The heating means 40 has an aluminum radiation fin portion 42 and a hot water passage 44 through which hot water of 75 ° C. passes at a flow rate of 5 L / min. The hygroscopic member 50 has a φ25 mm rotating mechanism (motor) 5 at the center of a disk-shaped hygroscopic material 51 made of silica gel and having a diameter of 150 mm × L30 mm.
2 is provided.

In the first ventilation passage 10 of the air conditioner shown in FIG.
0 ° C., a 60% RH air to 3m ³ / min air, the second air passage 20, the 30 ° C., if a 60% RH air was 3m ³ / min air, the outlet of the first air passage 10 That is, the temperature and humidity of the air at the first exhaust port 12 were measured. Before the measurement, the calcium chloride hydrate of the heat absorbing means 30 is cooled and solidified by a refrigerant in advance, and the supply of the refrigerant is stopped at the start of the measurement.

Table 1 shows the first exhaust port 12 from the start of ventilation.
Indicates the temperature and humidity of the air. It can be seen that the temperature and humidity of the air at the first exhaust port 12 decrease with time, and that dry cool air can be obtained.

The apparatus is continuously heated at 30 ° C. and 60% R
When the ventilation of the H air is continued, the temperature and humidity of the first exhaust port 12 start to increase after about 8 minutes. This is due to the fact that the heat storage agent 33 has completely released the cold heat, and that the hygroscopic material 51 has sufficiently absorbed moisture.

To regenerate the heat storage agent 33, the refrigerant is supplied to the heat absorbing means 30.
To regenerate the moisture absorbent 51, the moisture absorbent 5
The rotation can be performed by rotating 0 and passing the air heated by the heating means 40.

[0026]

[Table 1]

(Embodiment 2) As Embodiment 2, a case where the amount of the heat storage agent 33 sealed in Embodiment 1 is set to 20 kg will be described. Except for the amount of the heat storage agent, it is the same as the first embodiment.

The first embodiment of the air conditioner shown in FIG.
Air at 30 ° C. and 60% RH into the ventilation path 10 at 3 m ³ /
When the air at 30 ° C. and 60% RH is blown into the second ventilation path 20 at 3 m ³ / minute, the outlet of the first ventilation path 10, that is, the air of the first exhaust port 12 Temperature and humidity
The measurement was performed in the same manner as in Example 1. Before the measurement, the calcium chloride hydrate of the heat absorbing means 30 is cooled and solidified by a refrigerant in advance, and the supply of the refrigerant is stopped at the start of the measurement.

Table 2 shows the first exhaust port 12 from the start of ventilation.
Indicates the temperature and humidity of the air. It can be seen that the temperature and humidity of the air at the first exhaust port 12 decrease with time, and that dry cool air can be obtained.

The apparatus is continuously heated at 30 ° C. and 60% R
If the air of H is kept flowing, the temperature and humidity of the first exhaust port 12 start to increase after about 20 minutes. This is the heat storage agent 33
Of the temperature / humidity rise time in Example 1 due to the fact that
, And the effect of increasing the heat storage agent can be seen.

The regeneration of the heat storage agent 33 is performed by passing the refrigerant through the heat absorbing means 30, and the regeneration of the moisture absorbing material 51 is performed by rotating the moisture absorbing member 50 and passing the air heated by the heating means 40. It can be carried out.

[0032]

[Table 2]

(Embodiment 3) As Embodiment 3, in Embodiment 1, the container 31 of the heat storage agent 33 of the heat absorbing means 30 is replaced with the container 31 shown in FIG.
The case where the amount of the heat storage agent 33 is 20 kg in the finned Teflon resin container 31a (31b) with reduced ventilation resistance as in the second embodiment will be described. Except for the container for the heat storage agent and the amount of the heat storage agent, it is the same as the first embodiment.

The air conditioner shown in FIG.
Air at 30 ° C. and 60% RH into the ventilation path 10 at 3 m ³ /
When the air at 30 ° C. and 60% RH is blown into the second ventilation path 20 at 3 m ³ / minute, the outlet of the first ventilation path 10, that is, the air of the first exhaust port 12 Temperature and humidity
The measurement was performed in the same manner as in Example 1. Before the measurement, the calcium chloride hydrate of the heat absorbing means 30 is cooled and solidified by a refrigerant in advance, and the supply of the refrigerant is stopped at the start of the measurement.

Table 3 shows the first exhaust port 12 from the start of ventilation.
Indicates the temperature and humidity of the air. It can be seen that the temperature and humidity of the air at the first exhaust port 12 decrease with time, and that dry cool air can be obtained.

The apparatus is continuously heated at 30 ° C. and 60% R
If the air of H is kept flowing, the temperature and humidity of the first exhaust port 12 start to increase after about 30 minutes. This is the heat storage agent 33
Of the temperature / humidity rise time in Example 1 due to the fact that
, And the effect of increasing the heat storage agent can be seen. The fact that the temperature / humidity lowering rate is slower and the time at which the temperature / humidity starts to rise again is longer than in Example 2 is that the finned Teflon resin container 31a (3
1b), the efficiency of heat exchange with air is lower than that of Example 2.
This is because it is lower than that of FIG.

The regeneration of the heat storage agent 33 is performed by passing the refrigerant through the heat absorbing means 30, and the regeneration of the moisture absorbing material 51 is performed by rotating the moisture absorbing member 50 and passing the air heated by the heating means 40. It can be carried out.

[0038]

[Table 3]

[0039]

Since the present invention has the above-mentioned features, it is possible to reduce the energy consumption of the air conditioning system. In particular, it is possible to save labor by restricting the operation time of the compressor.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an example of an embodiment of a vehicle air conditioner according to the present invention.

FIG. 2 is a configuration diagram showing another example of the embodiment of the automotive air conditioner according to the present invention.

FIG. 3 is a configuration diagram of a heat absorbing unit in one embodiment.

FIG. 4 is a configuration diagram of a moisture absorbing member according to one embodiment.

FIG. 5 is a configuration diagram of a heating unit in one embodiment.

FIG. 6 is a configuration diagram showing the air conditioners of the first to third embodiments.

FIG. 7 is a configuration diagram of a container of a heat absorbing means used in Example 3.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 1st ventilation path 11 1st intake port 12 1st exhaust port 20 2nd ventilation path 21 2nd intake port 22 2nd exhaust port 30 Heat absorption means 31, 31a, 31b Container 32 Radiation fin part 33 Heat storage agent 34 Refrigerant passage 40 Heating means 41 Container 42 Radiation fin part 44 Hot water passage 50 Hygroscopic member 51 Hygroscopic material 52 Rotating mechanism 53 Insulating member 60 Heating / humidifying means

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuhiko Shinohara Nissan Motor Co., Ltd. 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa

Claims (5)

[Claims] A first ventilation path connecting the first intake port and the first exhaust port; and a second ventilation path connecting the second intake port and the second exhaust port. Cooling means for cooling the ventilation in the one ventilation path;
A moisture absorbing member movable between the first ventilation path and the second ventilation path is arranged in series, and heating means for heating ventilation is provided in the second ventilation path;
An automotive air conditioner in which a moisture absorbing member movable between the first ventilation path and the second ventilation path is arranged in series, wherein the cooling means has a function of storing cold heat. Air conditioner. 2. The automotive air conditioner according to claim 1, wherein the cooling means is configured such that a heat storage agent having a melting point of 15 ° C. or less is contained in a water-repellent container provided with a refrigerant passage. Characteristic automotive air conditioner. 3. The air conditioner for a vehicle according to claim 1, wherein said heating means is a container provided with a hot water passage. 4. The automotive air conditioner according to claim 1, wherein the moisture absorbing member has a substantially disc-shaped moisture absorbing material and a rotating mechanism provided at the center of the disc, and is provided by the cooling unit and the heating unit. An air conditioner for a vehicle, which is provided between the first ventilation path and the second ventilation path on the exhaust port side. 5. The automotive air conditioner according to claim 1, wherein the cooling unit, the heating unit, and the moisture absorbing member are provided in a multistage in the first ventilation path and the second ventilation path in a blowing direction. An air conditioner for a vehicle, wherein the air conditioner is arranged in a vehicle.