JP2000289456A - Humidifying and dehumidifying rotor, manufacture thereof, and air conditioning system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a humidifying and dehumidifying rotor capable of miniaturizing an air conditioning device. SOLUTION: A through hole 15 passing through a body 10 of a humidifying and dehumidifying rotor 1 in the direction of its axial line is formed by a flat plate 13a and a wave plate 13b wound around in a condition in which they are mutually overlapped in the body 10 thereof. Absorber absorbing water content in the air is provided in a half part on one end side in the direction of axial line among inner peripheral faces of the through hole 15. Consequently, one end part of the humidifying and dehumidifying rotor 1 is used as a latent heat exchange part, and the other end part thereof is used as a sensible heat exchange part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a dehumidifying and humidifying rotor,
The present invention relates to a manufacturing method thereof and an air conditioner for a vehicle using the dehumidifying / rotating rotor.

[0002]

2. Description of the Related Art A conventional air conditioner for a vehicle using a dehumidifying rotor is disclosed in, for example, Japanese Patent Application Laid-Open No. 9-318128. This air conditioner includes an introduction passage for introducing air outside the vehicle into the vehicle, and a discharge passage for discharging air inside the vehicle to the vehicle.The introduction passage and the discharge passage include a dehumidifying rotor and a dehumidifying rotor. A sensible heat exchanger is arranged over both passages.

In the air conditioner having the above structure, air introduced into the introduction passage from outside the vehicle is first dehumidified by the dehumidification rotor. Then, it is cooled by a sensible heat exchanger. Then, after being further cooled by the evaporator, it is supplied into the vehicle. On the other hand, the cold air flowing into the discharge passage from inside the vehicle cools the air introduced into the introduction passage when passing through the sensible heat exchanger. Thereby, the energy of the conditioned air is effectively used without wasting. The air that has passed through the sensible heat exchanger is heated by the regenerative heater and then passes through the dehumidification / humidification rotor. At that time, the dehumidifying / humidifying rotor is dried. The dried portion enters the introduction passage with the rotation of the dehumidification / humidification rotor, and dehumidifies the air introduced from outside the vehicle.

[0004]

In the conventional air conditioner described above, the dehumidifying and humidifying rotor and the sensible heat exchanger are separate from each other, so they must be installed independently.
There was a problem that installation took time. In addition, since each occupies an independent installation space, there is a problem that the installation space combining the two becomes large and the entire air conditioner becomes large.

[0005]

SUMMARY OF THE INVENTION A dehumidifying and humidifying rotor according to the present invention is provided on a body having a large number of through holes penetrating the inside thereof in the axial direction, and provided on an inner surface at one end side of the through holes, and passes through the through holes. An adsorbent for adsorbing moisture of air is provided, and one end provided with the adsorbent is a latent heat exchange unit, and the other end is a sensible heat exchange unit. The manufacturing method according to the present invention for manufacturing the suction rotor according to claim 1, is characterized in that one end of the main body in the axial direction is immersed in a liquid adhesive mixed with the powder of the adsorbent, thereby forming the through-hole. Is characterized in that the adsorbent is attached to the inner surface on one end side. The vehicle air conditioner according to the present invention includes:
It has an introduction passage for introducing the air taken in from the air intake into the vehicle, and a discharge passage for discharging the air inside the vehicle to the outside of the vehicle,
2. An air conditioner for a vehicle in which the introduction passage and the discharge passage are installed in parallel and the air flow directions are opposite to each other, wherein the axis of the dehumidifying and humidifying rotor of claim 1 is the introduction passage and the discharge passage. The dehumidifying and humidifying rotor is installed so as to be parallel to the passage, and a part in the radial direction of the dehumidifying / rotating rotor is projected into the introduction passage, and a part on the opposite side is projected into the discharge passage. In this case, it is desirable that the dehumidifying and humidifying rotor be installed with its latent heat exchanging portion facing the upstream side of the introduction passage. It is desirable to install a first regeneration heater inside the introduction passage near and upstream of the dehumidification rotor. It is desirable to install a second regenerative heater inside the discharge passage near and upstream of the dehumidification rotor. It is desirable to provide a dust filter on the front surface of the latent heat exchange section of the dehumidification / humidification rotor.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2
1 shows a dehumidifying and humidifying rotor 1 according to the present invention;
The main body 10 has a central cylinder 11 having a circular cross section. Bushes 12 for bearings are fitted and fixed to both ends of the inner peripheral surface of the central cylinder 11. The dehumidifying / humidifying rotor 1 is rotatably installed in, for example, a vehicle air conditioner via a shaft (not shown) inserted through the bush 12. A heat exchange element 13 is provided on the outer peripheral surface of the center tube 11.
The heat exchange element 13 is composed of a flat plate 14a and a corrugated plate 14b which are overlapped and joined to each other, and is formed by spirally winding the flat plate 13a and the corrugated plate 13b around the outer periphery of the center tube 11. I have. Flat plate 13
The “a” and the corrugated plate 13b are usually formed of a metal such as copper or aluminum, but may be formed of another material as long as the material has good heat conductivity. A reinforcing cylinder 14 having a circular cross section is fitted and fixed to the outer periphery of the heat exchange element 13.

The flat plate 14 constituting the heat exchange element 13
A large number of through holes 15 are formed between a and the corrugated plate 14b. This through hole 15 penetrates the heat exchange element 13 in the axial direction of the rotor 1. An adsorbent (not shown) that adsorbs moisture in the air is fixed to an approximately half inner peripheral surface from one end to the center of the through hole 15. Thus, one end of the dehumidifying and humidifying rotor 1 to which the adsorbent is fixed is a latent heat exchanging unit 1A, and the other end is a sensible heat exchanging unit 1A.
B. The adsorbent is made of, for example, fine particles or powder of zeolite, silica gel, and lithium chloride, and is fixed to the inner surface of the through hole 15 with an adhesive. The adsorbent may be fixed to the inner surface of the through hole 15 by other means.

When the dehumidifying and humidifying rotor 1 having the above structure is manufactured, a flat plate 13 joined to the outer periphery of the central cylinder 11 is formed.
The heat exchange element 13 is provided by winding a and the corrugated plate 13b. Further, as shown in FIG. 3, a liquid adhesive A is accommodated in a container C, and a powder of an adsorbent is mixed into the adhesive A, and the mixture is uniformly dispersed by stirring. Then, the heat exchange element 13 is immersed in the adhesive A from one end thereof to a predetermined position (in the case of this embodiment, a substantially central portion in the axial direction). Thereby, the adhesive and the adsorbent are attached to the inner peripheral surface of the through hole 15. At the time of immersion, it is desirable that masking is performed in advance with a resin or the like on the inner peripheral surface and the end surface of the central cylinder 11 where no adhesive or adsorbent is required.

Thereafter, the heat exchange element 13 is
To remove excess adhesive and adsorbent. Removal of excess adhesive and adsorbent can be performed, for example, by blowing air. Thereafter, the adhesive is dried to remove the adsorbent from the through-hole 15.
To the inner peripheral surface of Next, the bush 12 is
And the reinforcing tube 14 is provided on the outer peripheral surface of the heat exchange element 13 to manufacture the dehumidifying and humidifying rotor 1. The reinforcing cylinder 14 may be formed in a cylindrical shape in advance, and may be fitted and fixed to the outer peripheral surface of the heat exchange element 13. A flat metal plate is wound around the outer peripheral surface of the heat exchange element 13. The parts may be joined by welding or the like.

The adhering of the adsorbent to the inner peripheral surface of the through hole 15 is performed as follows.
It can be done by other methods. For example, an adhesive is applied in advance to necessary portions on the inner peripheral surface of the through hole 15,
The powder of the adsorbent is scattered and adhered in the through holes 15. After removing the excess adsorbent in the same manner as described above, the adhesive can be dried. However, in the case of the method shown in FIG. 3, the adsorbent can be more uniformly distributed to each part of the inner peripheral surface of the through hole 15. Therefore, it is desirable to adopt the method shown in FIG.

Next, a description will be given of a vehicle air conditioner using the dehumidifying / humidifying rotor 1 having the above configuration. FIG. 4 shows a vehicle air conditioner 2 in which a dehumidifying and humidifying rotor 1 is used.
Reference numeral 20 denotes a casing. Inside the casing 20, an introduction passage 30 and a discharge passage 40 are formed. The introduction passage 30 and the discharge passage 40 are adjacent to each other with the partition wall 21 interposed therebetween, and the flow directions of the air flowing inside the respective passages are opposite to each other as shown by arrows in FIG. The introduction passage 30 and the discharge passage 40 may be adjacent to each other only at the location where the dehumidifying and humidifying rotor 1 is installed, with the partition wall 21 interposed therebetween, or the air flowing direction may be reversed only at the adjacent location.

The introduction passage 30 is for introducing air outside the vehicle and / or inside the vehicle into the vehicle, and has an outside air inlet 31 and an inside air inlet 32 at its upstream end. A defrost outlet 33, a vent outlet 34, and a foot outlet 35 are formed at the downstream end of the introduction passage 30. Of course, other outlets other than or in addition to those may be provided. Inside the introduction passage 30, in order from the upstream side to the downstream side, a blowing fan 22 as a blowing unit, an evaporator 23 as a cooling unit forming a part of a refrigeration cycle together with a compressor (not shown), and a heater as a heating unit. 2
4 are installed.

In the above configuration, when the blower fan 22 rotates, the outside air intake 31 and / or the inside air intake 32
From outside air and / or inside air is taken into the introduction passage 30. Whether outside air or inside air is taken in,
Alternatively, the ratio of the outside air and the inside air to be taken in is determined by the position of the intake door 51. The air introduced into the introduction passage 30 is cooled by the evaporator 23. The cooled air is divided into one that passes through the heater 24 and one that bypasses the heater 24 according to the position of the air mixing door 52, and is mixed downstream of the heater 24. Thereby, the air is adjusted to a desired temperature. The conditioned air whose temperature has been adjusted is supplied to open / close doors 53, 54, and 55 provided at the defrost outlet 33, the vent outlet 34, and the foot outlet 35, respectively.
Is blown into the vehicle from the opened outlet.

A second inside air inlet 36 communicating with the inside of the vehicle is formed near the blower fan 22 of the casing 20. The second inside air inlet 36 is provided with an inside air door 56. The inside air door 56 is connected to the second air inlet 36.
It opens and closes, and opens and closes the introduction passage 30 between an upstream portion of the blower fan 22 and a downstream portion including the blower fan 22. When the second inside air inlet 36 is open, the introduction passage 30 is closed. When the upstream side and the downstream side are shut off and the second inside air inlet 36 is closed, the upstream side and the downstream side of the introduction passage 30 are communicated with each other. Therefore, when the air conditioner 2 is operated with the second internal air inlet 56 opened, the air in the vehicle only circulates, and the dehumidifying / humidifying rotor 1 is not affected at all. This operation mode is adopted at the time of so-called full cool or full hot.

The discharge passage 40 is for discharging air (inside air) inside the vehicle to the outside of the vehicle. An inlet 41 is formed at the upstream end of the discharge passage 40 and opens at the inside of the vehicle. A discharge port 42 is formed to open at the bottom. Inlet 4
Is opened and closed by an exhaust door 57. Here, when the fan 22 is rotated while at least a part of the outside air intake 41 is opened, the pressure inside the vehicle becomes slightly positive as the outside air is introduced into the vehicle. Therefore, when the exhaust door 57 is opened, the inside air is discharged to the outside of the vehicle through the discharge passage 40 as much as the outside air is taken in.

The dehumidifying and humidifying rotor 1 is rotatably mounted on the partition 21 with one radial side of the rotor 1 protruding into the introduction passage 30 and the other side protruding into the discharge passage 40. I have. The dehumidifying and humidifying rotor 1 is located between the intake door 51 and the fan 22 with respect to the introduction passage 30 and is located upstream of the discharge port 42 with respect to the discharge passage 40. In addition, the dehumidifying and humidifying rotor 1 is arranged such that the latent heat exchanging portion 1A faces the upstream side of the introduction passage 30 and the downstream side of the discharge passage 40. Note that the dehumidifying and humidifying rotor 1 may be arranged in the opposite direction. The dehumidifying and humidifying rotor 1 is configured to be slowly (for example, 0.1 to 10 rpm, preferably 0.2 to 1 rpm) rotated by a rotation driving means (not shown) such as a motor.

Since the dehumidifying and humidifying rotor 1 has the latent heat exchanging section 1A and the sensible heat exchanging section 1B provided integrally, it is easier to install the dehumidifying and humidifying rotor 1 than when they are formed separately and installed separately. The required labor can be reduced by half. Further, although the latent heat exchange section 1A and the sensible heat exchange section 1B have the same volume in the case where they are integrated and in the case where they are separated, the occupied space is smaller when they are integrated. Therefore, the size of the air conditioner 2 can be reduced.

A filter 3 for removing dust is provided on the front surface of the latent heat exchange section 1A of the dehumidifying and humidifying rotor 1. Therefore, the filter 3 is also driven to rotate together with the dehumidifying / rotating rotor 1. Moreover, the filter 3 is provided on the entire front surface of the latent heat exchange unit 1A, and one side of the filter 3 projects into the introduction passage 30 and the other side projects into the discharge passage 40.

A first regenerative heater 4 is disposed inside the introduction passage 30 near the upstream side of the filter 3. on the other hand,
The second regeneration heater 5 is disposed inside the discharge passage 40 near the upstream side of the dehumidification and humidification rotor 1.

The vehicle air conditioner 2 having the above configuration is controlled based on a program according to a flowchart shown in FIG. Note that this program is executed by a microcomputer (not shown) mounted on the vehicle at predetermined small time intervals. Of course, at the same time as the execution of this program, the temperature of the air blown out from each of the blowout ports 33, 34, 35 is also controlled.

After the program starts, first, in step S
At 1, it is determined whether or not the vehicle interior temperature is higher than a predetermined set temperature T. The temperature in the vehicle is measured by a temperature sensor installed in the vehicle. The set temperature T is for judging whether the air introduced into the introduction passage 30 at the time of air conditioning needs to be cooled by the evaporator 23 (in-vehicle temperature> T) or not (in-vehicle temperature ≦ T). Usually 16
The temperature is set to any temperature of up to 25 ° C. or a predetermined range thereof.

When the temperature inside the vehicle is equal to or lower than the set temperature T, it is determined in step S2 whether the temperature inside the vehicle is higher than the dew point temperature of the air inside the vehicle. That is, it is determined whether the relative humidity in the vehicle is 100% or less.

If the temperature inside the vehicle is equal to or lower than the dew point temperature, step S3 is executed. In step S3, since the temperature in the vehicle is equal to or less than T, it is determined that cooling of the air introduced into the introduction passage 30 by the evaporator 23 is unnecessary, and the compressor is turned off. Also,
Dehumidification by the dehumidification / rotation rotor 1 is performed to prevent fogging of the window glass. That is, the dehumidification rotor 1 is driven to rotate (hereinafter, referred to as dehumidification rotor ON), the first regeneration heater 4 is turned off, the second regeneration heater 5 is turned on, the inside air door 56 is closed, and the exhaust door 57 is opened. Is done. In the air conditioner 2, when the inside air door 56 is closed, the introduction ratio between the inside air and the outside air is about 8: 2 to 7: 3 in order to prevent the concentration of carbon dioxide in the air inside the vehicle from increasing. , And the exhaust door 57 is opened in order to exhaust the same amount of inside air as the introduced outside air to the outside.

In the air introduced from the outside air inlet 31 and the inside air inlet 32 into the introduction passage 30, dust contained therein is removed by the filter 3. Thereafter, the moisture in the air is adsorbed by the adsorbent in the latent heat exchange section 1A of the dehumidifying / humidifying rotor 1. In this case, when more moisture is to be adsorbed and removed, the dehumidifying / humidifying rotor 1 is rotated at a higher speed.
This is the same when humidification is performed by the dehumidification rotor 1. By absorbing moisture in the latent heat exchange section 1A,
While the humidity of the introduced air decreases, the introduced air heats the introduced air. The introduced air that has passed through the latent heat exchange unit 1A is heated in the sensible heat exchange unit 1B. Thereafter, part or all of the introduced air is heated by the heater 24. Then, the heated air and the air bypassing the heater 24 mix on the downstream side of the heater to reach a desired temperature, and the defrost outlet 33 and the vent outlet 3
4 and the foot outlet 35 are blown out from one or more outlets. Since the conditioned air has a low humidity, it reduces the humidity of the air in the vehicle and prevents the window glass from fogging.

A part of the air inside the vehicle is discharged to the outside through the discharge passage 40 as the outside air is introduced. At this time, the exhaust gas is first heated by the second regeneration heater 5. The heated exhaust heats the introduced air in the sensible heat exchange unit 1B. Thereafter, the adsorbent is dried in the latent heat exchanging section 1A so that moisture can be absorbed again. Then, dust is blown off from the filter 3 when passing through the filter 3. Therefore, the filter 3 is maintenance-free. After that, it is discharged to the outside through the discharge port 42 together with the dust.

If it is determined in step S2 that the temperature inside the vehicle is higher than the dew point temperature, step S4 is executed. In step 4, since the temperature in the vehicle ≦ T, the evaporator 2 of the air introduced into the introduction passage 30
3 does not require cooling,
The state is changed to the F state. Further, since the humidity in the vehicle is low, humidification by the dehumidification rotor 1 is performed. Therefore, the dehumidification rotor 1 is turned on, the first regeneration heater 4 is turned on, the second regeneration heater 5 is turned off, the inside air door 56 is closed, and the exhaust door 57 is opened.

Therefore, the air introduced into the introduction passage 30 is first heated by the first regeneration heater 4.
After the heated air is dust-removed by the filter 3, the adsorbent of the latent heat exchange unit 1A is dried. As a result,
The introduced air becomes high in humidity and is cooled by removing heat of vaporization. Then, the air is heated by the sensible heat exchange unit 1B, heated to a desired temperature by the heater 24, and blown into the vehicle from at least one of the blowout ports 33, 34, 35. On the other hand, the inside air that has entered the discharge passage 40 through the inlet 41 heats the introduced air in the sensible heat exchange unit 1B, and then is absorbed in the latent heat exchange unit 1A, and is filtered.
Blow off dust adhering to Then, it is discharged out of the vehicle together with the dust.

If it is determined in step S1 that the vehicle interior temperature> the set temperature T, it is determined in step S5 whether the vehicle interior temperature> T + α. Car temperature ≤ T +
If α, step S6 is executed, and the temperature inside the vehicle>
If T + α, step S7 is executed.

In step S6, since the temperature in the vehicle is greater than T, the season is summer, and it is determined that the air introduced into the introduction passage 30 needs to be cooled by the evaporator 23, and the compressor is turned on. . In addition, the dehumidifying / humidifying rotor 1 is turned on in order to dehumidify high humidity outside air in summer. However, the dehumidification of the introduced air is performed by the evaporator 2
Since it is also performed in 3, it is not necessary to dehumidify strongly,
The first regeneration heater 4 and the second regeneration heater 5 are turned off. Of course, if the dehumidification is positively performed, the second regeneration heater 5 may be turned on. The inside air door 56 is closed, and the exhaust door 57 is opened.

The air introduced into the introduction passage 30 is dedusted by the filter 3 and dehumidified by the latent heat exchange unit 1A.
It is cooled in the sensible heat exchange unit 1B. Thereafter, the introduced air is further cooled by the evaporator 23. The cooled introduced air is adjusted to a desired temperature by the position of the air mixing door 52 and the heater 24, and the outlets 33,
It is blown out from at least one of 34 and 35. on the other hand,
The inside air that has entered the discharge passage 40 from the inlet 41 cools the introduced air in the sensible heat exchange unit 1B, then dries the adsorbent in the latent heat exchange unit 1A, and blows off dust attached to the filter 3. Then, it is discharged out of the vehicle together with the dust.

In step 7, the temperature inside the vehicle> T + α
Therefore, it is determined that it is necessary to strongly cool the inside of the vehicle, and the compressor is turned on. Also, in order to give priority to cooling over dehumidification and humidification by the dehumidification rotor 1, the dehumidification / humidification rotor 1 is turned off, and the first and second regeneration heaters 4 and 5 are turned off.
FF, the inside air door 56 is opened, and the exhaust door 57 is closed. Therefore, the air conditioner 2 is in the inside air circulation mode in which the air does not pass through the dehumidification rotor 1. At this time, the air mix door 52 is positioned so that the entire air flowing in the introduction passage 30 bypasses the heater 24.

Therefore, the air inside the vehicle is introduced into the introduction passage 30 from the second inside air inlet 36. The air introduced into the introduction passage 30 is cooled by the evaporator 23 and is blown into the vehicle from at least one of the outlets 33, 34, 35. Thereby, the interior of the vehicle is rapidly cooled.

The present invention is not limited to the above embodiment, but can be changed as appropriate. For example, the dehumidifying and humidifying rotor 1 includes a latent heat exchange unit 1A and a sensible heat exchange unit 1B.
Are formed integrally, but both may be formed separately and connected. However, also in that case, it is necessary to quickly transfer heat between the latent heat exchange unit 1A and the sensible heat exchange unit 1B. In the air conditioner 2, the dehumidifying and humidifying rotor 1 is automatically turned on and off based on the temperature in the vehicle.
F is performed, but may be switched manually when the air conditioner 2 is stopped, for example. For example, a dehumidification switch and a humidification switch are installed, and when the dehumidification switch is ON, the fan 21 is turned ON,
The dehumidifying and humidifying rotor 1 and the second regeneration heater are turned on, and the first
The regeneration heater 4 is turned off. Conversely, the humidifier switch is
N, the dehumidifying / humidifying rotor 1, the fan 21 and the first
The reproduction heater 4 is turned on, and the second reproduction heater 5 is turned off.

[0034]

As described above, according to the dehumidifying and humidifying rotor of the present invention, the time required for installing the rotor in an air conditioner can be reduced by half, and the size of the air conditioner can be reduced. Is obtained. According to the manufacturing method of the present invention, an effect is obtained that the adsorbent can be uniformly fixed to the inner surface of the through hole of the rotor body. ADVANTAGE OF THE INVENTION The air conditioner of this invention can achieve size reduction and the effect that dehumidification and humidification in a vehicle can be performed.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a dehumidifying / humidifying rotor according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a diagram for explaining a manufacturing method according to the present invention.

FIG. 4 is a sectional view showing a schematic configuration of an embodiment of a vehicle air conditioner according to the present invention.

FIG. 5 is a view showing a flowchart for controlling the air conditioner shown in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dehumidification / humidification rotor 1A Latent heat exchange part 1B Sensible heat exchange part 2 Vehicle air conditioner 3 Filter 4 First regeneration heater 5 Second regeneration heater 10 Main body of dehumidification / humidification rotor 15 Through hole 30 Introductory passage 31 Outside air intake (air intake) ) 32 Inside air intake (air intake)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinichi Hara 39, Higashihara, Chiyo-ji, Konan-cho, Osato-gun, Saitama F-term in Zexel Konan Plant (reference) 3L053 BC03 BC09

Claims (7)

[Claims] 1. A main body having a large number of through holes penetrating the inside in the axial direction, and an adsorbent provided on an inner surface on one end side of the through hole and adsorbing moisture of air passing through the through hole, A dehumidifying / humidifying rotor, wherein one end provided with the adsorbent is a latent heat exchanging unit, and the other end is a sensible heat exchanging unit. 2. A method of adhering the adsorbent to the inner surface at one end of the through hole by immersing one end of the main body in the axial direction in a liquid adhesive mixed with the powder of the adsorbent. The method for manufacturing a dehumidifying and humidifying rotor according to claim 1. 3. An intake passage for introducing air taken in from an air intake into a vehicle, and a discharge passage for discharging air in the vehicle to the outside of the vehicle, wherein the introduction passage and the discharge passage are arranged in parallel with each other. 2. The air-conditioning system for a vehicle according to claim 1, wherein said dehumidifying and humidifying rotors are installed such that their axes are parallel to said introduction passage and said discharge passage. An air conditioner for a vehicle, characterized in that a part of the radial direction protrudes into the introduction passage and a part on the opposite side protrudes into the discharge passage. 4. The air conditioner for a vehicle according to claim 3, wherein the dehumidifying / humidifying rotor is installed in a state where a latent heat exchanging portion thereof faces an upstream side of the introduction passage. 5. The air conditioner for a vehicle according to claim 4, wherein a first regenerative heater is provided inside the introduction passage near and upstream of the dehumidifying rotor. 6. The air conditioner for a vehicle according to claim 4, wherein a second regenerative heater is provided inside the discharge passage upstream of and near the dehumidifying rotor. 7. A dust removing filter is provided on a front portion of the latent heat exchange section of the dehumidifying / humidifying rotor.
7. The vehicle air conditioner according to any one of claims 6 to 6.