JP2022080758A - Vehicle dehumidification system - Google Patents

Abstract

To provide a vehicle dehumidification system capable of reducing a humidity absorbing device in size and weight and curbing energy consumption for regeneration.SOLUTION: A dehumidification system comprises dehumidification devices 11A and 11B which absorb water vapor in air in a vehicle interior. The dehumidification system desorbs the water vapor absorbed with the dehumidification devices 11A and 11B by heating the same. The humidification devices 11A and 11B are respectively provided with a plurality of humidity absorbing sections having individually different humidity absorbing properties and regeneration temperatures and a plurality of heating sections individually heating respective humidity absorbing sections when performing regeneration.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle dehumidifying device that adsorbs and removes water vapor contained in the air inside a vehicle interior.

As a dehumidifying device for removing indoor humidity (water vapor), there is known a dehumidifying device in which indoor air is passed through a moisture absorbing device having a built-in moisture absorbing filter, and water vapor contained in the air is adsorbed and removed by the moisture absorbing filter. In this type of dehumidifying device, if the adsorption of water vapor by the moisture absorbing filter progresses, the moisture absorbing performance of the moisture absorbing filter deteriorates, so that the moisture absorbing filter is regenerated at an appropriate timing. In the regeneration of the moisture absorption filter, the water vapor adsorbed on the moisture absorption filter is desorbed (evaporated) by blowing warm air through the moisture absorption filter or directly heating the moisture absorption filter with a heater (see, for example, Patent Document 1).

The dehumidifying device described in Patent Document 1 has a first hygroscopic unit that exhibits high dehumidifying performance in an environment with high relative humidity and a first dehumidifying unit that exhibits high dehumidifying performance in an environment with low relative humidity inside the moisture absorbing device. Two moisture absorbing parts are arranged, and warm air is blown through the two moisture absorbing parts at the time of regeneration. With this configuration, it is possible to satisfactorily perform dehumidification under normal temperature and dehumidification in an extremely low temperature environment where absolute humidity decreases, while suppressing an increase in capacity and weight of the entire moisture absorbing portion.

Japanese Unexamined Patent Publication No. 2006-308247

However, since the dehumidifying device described in Patent Document 1 is configured to flow warm air to the two types of moisture absorbing portions in the same manner during regeneration, the temperature of the warm air is adjusted to the temperature of the moisture absorbing portion on the side where the regeneration temperature is high. Need to be set. Therefore, in the case of the dehumidifying device described in Patent Document 1, if the moisture absorbing portion on the lower regeneration temperature side is viewed, the heating is performed at a temperature higher than necessary, and the energy consumption for regeneration increases.

Therefore, the present invention is intended to provide a vehicle dehumidifying device capable of reducing the size and weight of a hygroscopic device and suppressing energy consumption for regeneration.

The vehicle dehumidifying device according to the present invention adopts the following configuration in order to solve the above problems.
That is, the vehicle dehumidifying device according to the present invention includes a moisture absorbing device (for example, the moisture absorbing devices 11A and 11B of the embodiment) that adsorbs water vapor contained in the air inside the vehicle interior, and heats the water vapor adsorbed on the moisture absorbing device by heating. A dehumidifying device for a vehicle to be desorbed, wherein the hygroscopic device includes a plurality of hygroscopic portions having different hygroscopic characteristics and regeneration temperatures (for example, the upstream hygroscopic portion 15 and the downstream hygroscopic portion 16 of the embodiment). It is characterized by including a plurality of heating portions (for example, heaters 21 and 22 of the embodiment) that directly and individually heat each of the moisture absorbing portions during regeneration.

In the vehicle dehumidifying device according to the present invention, since the moisture absorbing device includes a plurality of moisture absorbing portions having different moisture absorbing characteristics and regeneration temperatures, the different moisture absorbing portions can efficiently adsorb water vapor depending on the humidity range. Therefore, the hygroscopic device can be made smaller and lighter than the case where one hygroscopic portion covers the hygroscopicity in a wide range of humidity.
Further, since the vehicle dehumidifying device according to the present invention includes a plurality of heating units that directly heat each moisture absorbing portion individually, each moisture absorbing portion can be heated at a temperature suitable for regeneration without waste. Therefore, energy consumption due to heating can be suppressed.

Air may be introduced into the plurality of moisture absorbing portions in series from the same side during moisture absorption and regeneration.

In this case, unlike the case where air is introduced from different sides during moisture absorption and regeneration, the structure of the air introduction portion can be simplified. Therefore, when this configuration is adopted, it is possible to reduce the size and weight of the dehumidifying device and reduce the manufacturing cost.

The moisture absorbing device is located on the upstream side moisture absorbing portion (for example, the upstream side moisture absorbing portion 15 of the embodiment), which is one of the moisture absorbing portions, arranged on the upstream side in the air flow direction, and on the downstream side in the air flow direction. It has a downstream side moisture absorbing portion (for example, the downstream side moisture absorbing portion 16 of the embodiment) which is another one of the arranged moisture absorbing portions, and the downstream side moisture absorbing portion is regenerated more than the upstream side moisture absorbing portion. Those with a high temperature may be applied.

In this case, the downstream moisture absorbing portion receives the heat of the upstream heating portion and is more likely to be heated. Therefore, it is possible to efficiently raise the temperature of the moisture absorbing portion on the downstream side to the optimum regeneration temperature.

The upstream side moisture absorbing portion has a moisture absorption characteristic in which the amount of water vapor adsorbed is larger than that of the downstream side moisture absorbing portion in a high humidity environment, and the downstream side moisture absorbing portion has a water vapor absorption characteristic higher than that of the upstream side moisture absorbing portion in a low humidity environment. It is desirable to have adsorption characteristics with a large amount of water vapor.

In this case, in a high humidity environment, the air absorbed by the upstream moisture absorbing portion and having low humidity flows into the downstream moisture absorbing portion. At this time, the downstream moisture absorbing portion can efficiently adsorb water vapor in the air having low humidity. Therefore, in a high humidity environment, water vapor in the air can be efficiently adsorbed in the entire area of the moisture absorbing device. Further, in a low humidity environment, the absolute humidity of the air in the vehicle interior can be sufficiently lowered by the moisture absorption function of the moisture absorption portion on the downstream side.

The upstream side moisture absorbing portion and the downstream side moisture absorbing portion may be configured to be mutually removable.

In this case, it is possible to ship even if one of the upstream side moisture absorbing portion and the downstream side moisture absorbing portion is removed depending on the usage environment and the like. Therefore, common parts can be shared by vehicles having a plurality of specifications.

Two sets of the moisture absorbing devices may be provided in parallel, and each of the moisture absorbing devices may be capable of alternately switching between moisture absorption and regeneration.

In this case, while the one moisture-absorbing device is dehumidifying the vehicle interior, the other moisture-absorbing device is regenerated, and after the reproduction of the other moisture-absorbing device is completed, the connection between the two moisture-absorbing devices is switched to switch the connection between the two moisture-absorbing devices. Dehumidification can be performed continuously by two sets of moisture absorbing devices.

In the vehicle dehumidifying device according to the present invention, water vapor can be efficiently adsorbed by different moisture absorbing portions depending on the humidity range, and each moisture absorbing portion can be heated at a temperature suitable for regeneration without waste. Therefore, when the vehicle dehumidifying device according to the present invention is adopted, it is possible to reduce the size and weight of the hygroscopic device and suppress the energy consumption for regeneration.

The schematic side view of the interior of the vehicle which adopted the dehumidifying device of embodiment. Schematic vertical cross-sectional view of the dehumidifying device of the embodiment. The perspective view of the dehumidifying apparatus of embodiment. FIG. 3 is a cross-sectional view taken along the line IV-IV of FIG. 3 of the dehumidifying device of the embodiment. Schematic vertical cross-sectional view of the dehumidifying device of the modified example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic side view of the interior of a vehicle 1 that employs the dehumidifying device 10 according to the present embodiment.
As shown in FIG. 1, the dehumidifying device 10 is arranged, for example, below the rear part of the vehicle interior 2, and blows out the air in the dehumidified vehicle compartment 2 to the front side of the vehicle compartment 2. Further, the absorbed water vapor is discharged to the outside of the vehicle 1 by the regeneration operation of the dehumidifying device 10.

FIG. 2 is a schematic vertical sectional view of the dehumidifying device 10, and FIG. 3 is a perspective view of the dehumidifying device 10.
The dehumidifying device 10 includes a pair of hygroscopic devices 11A and 11B that circulate air in the vehicle interior and adsorb water vapor (humidity) in the air, a rectangular tubular housing 12 that houses the hygroscopic devices 11A and 11B inside. An upstream duct block 13 for introducing air connected to one end side of the housing 12 and a downstream duct block 14 for discharging air connected to the other end side of the housing 12 are provided.

In the moisture absorbing devices 11A and 11B, two types of moisture absorbing portions (upstream side moisture absorbing portion 15 and downstream side moisture absorbing portion 16) capable of allowing air to flow are arranged inside a rectangular tubular case. The detailed structure of the moisture absorbing devices 11A and 11B will be described later.

The housing 12 has a partition wall 17 inside along the air flow direction. The partition wall 17 separates the inside of the housing 12 into two storage chambers. Corresponding moisture absorbing devices 11A and 11B are arranged in each accommodation chamber.

The upstream duct block 13 branches the inflow port 13a into which the air in the vehicle interior flows and the air flowing in from the inflow port 13a into two flows and introduces them into the corresponding moisture absorbing devices 11A and 11B in the housing 12. It has passages 13b and 13c. Further, an air introduction fan 18 is installed in the upstream portion of the branch passages 13b and 13c in the upstream duct block 13 to suck the air in the vehicle interior and supply it to the moisture absorbing devices 11A and 11B.

The downstream duct block 14 has two communication passages 14a and 14b communicating with the corresponding moisture absorbing devices 11A and 11B in the housing 12, an indoor return port 14c for returning the dehumidified air to the vehicle interior, and moisture absorbing devices 11A and 11B. It has a discharge port 14d for discharging the air (air containing water vapor) used for the regeneration of the vehicle to the outside of the vehicle. Inside the downstream duct block 14, a flow path switching mechanism 19 is installed to selectively connect the communication passages 14a and 14b to either the indoor return port 14c or the discharge port 14d.

When one of the moisture absorbing devices 11A is connected to the indoor return port 14c side, the flow path switching mechanism 19 connects the other moisture absorbing device 11B to the discharge port 14d side and the other moisture absorbing device 11B to the indoor return port 14c side. When connected to, one of the moisture absorbing devices 11A is connected to the discharge port 14d side. Therefore, in the dehumidifying device 10 of the present embodiment, the moisture absorption and regeneration of the moisture absorbing devices 11A and 11B can be switched by switching the flow path in the downstream duct block 14 by the flow path switching mechanism 19.

FIG. 4 is a cross-sectional view taken along the line IV-IV of the dehumidifying device 10 of FIG.
As shown in FIG. 2, each of the moisture absorbing devices 11A and 11B includes an upstream moisture absorbing portion 15 arranged on the upstream side in the air flow direction and a downstream moisture absorbing portion 16 arranged on the downstream side. .. The upstream side moisture absorbing portion 15 and the downstream side moisture absorbing portion 16 are arranged in series in the air flow direction. As shown in FIG. 4, each of the hygroscopic portions 15 and 16 has a predetermined hygroscopic agent supported on a breathable sheet 20 folded in a fold shape.

As the hygroscopic agent carried on the upstream side hygroscopic unit 15, one that exhibits high hygroscopic performance in an environment with high absolute humidity (under a normal humidity environment) (for example, Huxley (registered trademark)) is used. On the other hand, the hygroscopic agent carried on the downstream side hygroscopic unit 16 exhibits high hygroscopic performance in an environment with low absolute humidity (for example, in an environment in a cold region of -10 ° C or lower) (for example, AQSOA (registered trademark)). ) Etc.) are used.
Therefore, the upstream side moisture absorbing portion 15 has a moisture absorption characteristic in which the amount of water vapor adsorbed is larger than that of the downstream side moisture absorbing portion 16 in a high humidity environment, and the downstream side moisture absorbing portion 16 is more than the upstream side moisture absorbing portion 15 in a low humidity environment. Also has an adsorption characteristic with a large amount of water vapor adsorbed.

In the present embodiment, the upstream side moisture absorbing portion 15 and the downstream side moisture absorbing portion 16 are formed by the sheet 20 carrying the hygroscopic agent, but the member supporting the hygroscopic agent is not limited to the sheet 20. The member that supports the hygroscopic agent may be, for example, a honeycomb-shaped base material or a mesh-shaped base material as long as it is a member that can be heated by energization.

In the case of the present embodiment, the regeneration temperature of the downstream moisture absorbing portion 16 (the temperature at which the adsorbed water vapor is satisfactorily released) is higher than the regeneration temperature of the upstream moisture absorbing portion 15. Therefore, in the present embodiment, the upstream side moisture absorbing portion 15 and the downstream side moisture absorbing portion 16 have different hygroscopic characteristics and regeneration temperatures.

Further, each of the moisture absorbing devices 11A and 11B has a plurality of plate-shaped heaters 21 and 22 (heating portions) that come into contact with each sheet 20 of the upstream side moisture absorbing portion 15 and the downstream side moisture absorbing portion 16 over almost the entire area in the air flow direction. ) Is provided individually. The upstream heater 21 (upstream heating section) directly heats the upstream moisture absorbing section 15 during regeneration, and the downstream heater 22 (downstream heating section) directly heats the downstream moisture absorbing section 16 during regeneration. When the corresponding moisture absorbing devices 11A and 11B are regenerated, the heaters 21 and 22 are individually heated so that the moisture absorbing portions 15 and 16 reach the regeneration temperature.
Different temperature rise settings of the two heaters 21 and 22 can be realized by changing the resistance value of each heating unit or changing the applied voltage. It can also be realized by changing the timing and time of applying the voltage to each of the heaters 21 and 22.

Further, in the present embodiment, the upstream side moisture absorbing portion 15 and the downstream side moisture absorbing portion 16 of the moisture absorbing devices 11A and 11B are configured to be detachable from each other. Therefore, the upstream side moisture absorbing portion 15 and the downstream side moisture absorbing portion 16 can be used independently for the moisture absorbing device, respectively. The upstream side moisture absorbing portion 15 and the downstream side moisture absorbing portion 16 of each of the moisture absorbing devices 11A and 11B may have a structure that can be separated together with the housing 12.

(Operation of dehumidifier)
The dehumidifying device 10 of the present embodiment can simultaneously perform dehumidification in the vehicle interior 2 by one of the moisture absorbing devices 11A (or 11B) and regeneration of the other moisture absorbing device 11B (or 11A). The dehumidification of the vehicle interior 2 by one of the moisture absorbing devices 11A (or 11B) and the regeneration of the other moisture absorbing device 11B (or 11A) are switched every predetermined time.
Hereinafter, the operation of the dehumidifying device 10 will be described by taking as an example a case where the inside of the vehicle interior 2 is dehumidified by the moisture absorbing device 11A and the moisture absorbing device 11B is regenerated at the same time.

When the air introduction fan 18 operates, the air in the passenger compartment 2 is sucked into the upstream duct block 13, a part of the air is introduced into one moisture absorption device 11A, and the remaining air is introduced into the other moisture absorption device 11B. be introduced. At this time, the heaters 21 and 22 in the other moisture absorbing device 11B individually heat the upstream side moisture absorbing portion 15 and the downstream side moisture absorbing portion 16 so that the temperature is raised to the regeneration temperature, respectively.

The air introduced into one of the moisture absorbing devices 11A sequentially passes through the upstream moisture absorbing portion 15 and the downstream moisture absorbing portion 16, and the water vapor contained in the air is adsorbed by the upstream moisture absorbing portion 15 and the downstream moisture absorbing portion 16 between them. Will be done.
The downstream side moisture absorbing portion 16 carries a hygroscopic agent that exhibits high moisture absorbing performance in a lower humidity environment than the upstream side moisture absorbing portion 15. Further, the upstream side moisture absorbing portion 15 carries a hygroscopic agent that can be regenerated even if the temperature is low during regeneration as compared with the upstream side moisture absorbing portion 15. Therefore, due to these configurations, moisture is mainly absorbed by the upstream moisture absorbing portion 15 in a normal temperature environment where the absolute humidity of the intake air is high. On the other hand, in an environment where the outside air temperature is extremely low, it is necessary to keep the absolute humidity in the vehicle interior low in order to ensure anti-fog, and the absolute humidity of the intake air is also lower than in a normal temperature environment. In such an extremely low temperature environment, the upstream side moisture absorbing portion 15 lowers the absolute humidity of the intake air, while the downstream side moisture absorbing portion 16 having excellent moisture absorption performance in a low humidity environment further increases the absolute humidity of the intake air. Decrease. As a result, the intake air is dehumidified to a predetermined absolute humidity. The air dehumidified by the moisture absorbing device 11A is returned to the vehicle interior 2 via the flow path switching mechanism 19 and the indoor return port 14c.

The air introduced into the other moisture absorbing device 11B sequentially passes through the upstream side moisture absorbing portion 15 and the downstream side moisture absorbing portion 16, and during this time, the heat of each of the heaters 21 and 22 promotes the desorption of water vapor. The air containing the water vapor desorbed from the moisture absorbing portions 15 and 16 is discharged to the outside of the vehicle via the flow path switching mechanism 19 and the discharge port 14d. Since the upstream side moisture absorbing portion 15 and the downstream side moisture absorbing portion 16 are heated to a temperature suitable for regeneration by the corresponding heaters 21 and 22, respectively, the regeneration can be completed in a short time.

(Effect of embodiment)
As described above, in the dehumidifying device 10 of the present embodiment, the moisture absorbing devices 11A and 11B include a plurality of moisture absorbing portions (upstream side moisture absorbing portion 15 and downstream side moisture absorbing portion 16) having different moisture absorbing characteristics and regeneration temperatures. .. Therefore, different moisture absorbing portions can efficiently adsorb water vapor depending on the humidity range in the vehicle interior. Therefore, the capacity of the entire moisture absorbing devices 11A and 11B can be reduced, and the size and weight of the entire device can be reduced as compared with the case where one moisture absorbing portion covers the moisture absorption in a wide range of humidity. Further, in general, a hygroscopic agent having high hygroscopicity on the low humidity side has a high material cost, so that a hygroscopic agent having high hygroscopicity on the low humidity side is supported only in a part of the hygroscopic part as in this configuration. When is adopted, it is possible to reduce the loading amount of materials having a high material cost and reduce the product cost.

Further, since the dehumidifying device 10 of the present embodiment includes a plurality of heaters 21 and 22 (heating units) that directly heat each moisture absorbing portion (upstream side moisture absorbing portion 15 and downstream side moisture absorbing portion 16) individually. Each hygroscopic part can be heated without waste at a temperature suitable for regeneration. Therefore, energy consumption due to heating can be minimized.
Therefore, when the dehumidifying device 10 of the present embodiment is adopted, it is possible to reduce the size and weight of the hygroscopic devices 11A and 11B and suppress the energy consumption for regeneration.

Further, the dehumidifying device 10 of the present embodiment is configured such that air is introduced in series from the same side during moisture absorption and regeneration to the upstream side moisture absorbing portion 15 and the downstream side moisture absorbing portion 16 of the moisture absorbing devices 11A and 11B. There is. Therefore, unlike the case where air is introduced from different sides during moisture absorption and regeneration, the structure of the air introduction portion can be simplified. Therefore, when this configuration is adopted, it is possible to reduce the size and weight of the dehumidifying device 10 and reduce the manufacturing cost.

Further, the dehumidifying device 10 of the present embodiment is set so that the regeneration temperature of the downstream moisture absorbing portions 16 of the moisture absorbing devices 11A and 11B is higher than the regeneration temperature of the upstream moisture absorbing portions 15. Therefore, the heat of the heater 21 (heating unit) arranged in the upstream side moisture absorbing portion 15 can be used to raise the temperature of the downstream side moisture absorbing portion 16 to the regeneration temperature at an early stage. Therefore, when this configuration is adopted, energy consumption in the heater 22 arranged in the downstream moisture absorbing portion 16 can be suppressed.

Further, in the dehumidifying device 10 of the present embodiment, the upstream side moisture absorbing portion 15 has a moisture absorption characteristic in which the amount of water vapor adsorbed is larger than that of the downstream side moisture absorbing portion 16 in a high humidity environment, and the downstream side moisture absorbing portion 16 is in a low humidity environment. It has an adsorption characteristic that the amount of water vapor adsorbed is larger than that of the moisture absorbing portion 15 on the upstream side. Therefore, in a high humidity environment, the water vapor in the air absorbed by the upstream side moisture absorbing portion 15 and having a low humidity can be further adsorbed by the downstream side moisture absorbing portion 16. Therefore, when this configuration is adopted, water vapor in the air can be efficiently adsorbed in the entire area of the moisture absorbing devices 11A and 11B in a high humidity environment, and in a low humidity environment, the downstream side moisture absorbing portion 16 can be efficiently adsorbed. The moisture absorption function can sufficiently reduce the absolute humidity of the air in the vehicle interior.

Further, when the dehumidifying device 10 is configured so that the upstream side moisture absorbing portion 15 and the downstream side moisture absorbing portion 16 can be detached from each other, either the upstream side moisture absorbing portion 15 or the downstream side moisture absorbing portion 16 is configured according to the usage environment or the like. It can be shipped even if one is removed. Therefore, since common parts can be shared by vehicles having a plurality of specifications, production efficiency can be further improved.

Further, the dehumidifying device 10 of the present embodiment is provided with two sets of moisture absorbing devices 11A and 11B in parallel, and is configured to alternately switch between moisture absorption and regeneration of each of the moisture absorbing devices 11A and 11B over time. .. Therefore, while the one moisture absorbing device 11A is dehumidifying the vehicle interior, the other moisture absorbing device 11B is regenerated, and after the reproduction of the other moisture absorbing device 11B is completed, both the moisture absorbing devices 11A and 11B are connected. By switching, the dehumidification in the vehicle interior 2 can be continuously performed by the two sets of hygroscopic devices 11A and 11B.

(Modification example)
FIG. 5 is a schematic vertical sectional view of the dehumidifying device 10A of the modified example. In FIG. 5, the same reference numerals are given to the same parts as those in the above-described embodiment.
The dehumidifying device 10A of this modification has almost the same basic configuration as the above embodiment, but the structure of the upstream duct block 13A connected to one end side of the housing 12 is different from the above embodiment. ..

The upstream duct block 13A has a collecting passage 13Ad having an inflow port 13Aa and branch passages 13Ab and 13Ac bifurcating from the collecting passage 13Ad. The collecting passage 13Ad is provided with an air introduction fan 18 for introducing the air in the vehicle interior into the moisture absorbing devices 11A and 11B. The branch passages 13Ab and 13Ac communicate with the moisture absorbing devices 11A and 11B, respectively. On the downstream side of the collecting passage 13Ad from the air introduction fan 18, an intake air distribution door 40 for adjusting the ratio of air flowing from the collecting passage 13Ad into the respective branch passages 13Ab and 13Ac is provided. The intake air distribution door 40 is rotated by an actuator (not shown). In the present embodiment, the ratio of the air for moisture absorption and the air for regeneration can be adjusted by adjusting the rotation position of the intake air distribution door 40.

In FIG. 5, the structure of the downstream duct block 14 is schematically drawn. In FIG. 5, for convenience of understanding the structure of the passage, two indoor return ports 14c and two discharge ports 14d are drawn so as to be connected to the respective communication passages 14a and 14b. Opening / closing doors 42a and 42b constituting the flow path switching mechanism 19 are arranged on the downstream side of the communication passages 14a and 14b. The opening / closing doors 42a and 42b open and close the indoor return port 14c and the discharge port 14d by operating an actuator (not shown). The opening / closing doors 42a and 42b selectively connect the communication passages 14a and 14b to either the indoor return port 14c or the discharge port 14d.

In the dehumidifying device 10A of this modification, since the intake air distribution door 40 is arranged in the upstream duct block 13A, by adjusting the rotation position of the intake air distribution door 40, the moisture absorption devices 11A and 11B can be used with respect to each of the moisture absorption devices 11A and 11B. The air for moisture absorption and the air for regeneration can be appropriately separated.

The present invention is not limited to the above embodiment, and various design changes can be made without departing from the gist thereof.

10, 10A ... Dehumidifying device 11A, 11B ... Moisture absorbing device 15 ... Upstream moisture absorbing part (moisture absorbing part)
16 ... Downstream moisture absorbing part (moisture absorbing part)
21 and 22 ... Heater (heating part)

Claims (6)

Equipped with a moisture absorption device that adsorbs water vapor contained in the air inside the vehicle
A vehicle dehumidifier that desorbs water vapor adsorbed on the moisture absorbing device by heating.
The moisture absorbing device is
Multiple hygroscopic parts with different hygroscopic characteristics and regeneration temperature,
A plurality of heating parts that directly and individually heat each of the hygroscopic parts during regeneration, and
Dehumidifying device for vehicles characterized by being equipped with. The vehicle dehumidifying device according to claim 1, wherein air is introduced in series from the same side during moisture absorption and regeneration into the plurality of moisture absorbing portions. The moisture absorbing device is
An upstream moisture absorbing portion, which is one of the moisture absorbing portions arranged on the upstream side in the air flow direction,
It has a downstream moisture absorbing portion, which is one of the other moisture absorbing portions arranged on the downstream side in the air flow direction.
The vehicle dehumidifying device according to claim 1 or 2, wherein the downstream side moisture absorbing portion has a higher regeneration temperature than the upstream side moisture absorbing portion. The upstream side moisture absorbing portion has a moisture absorption characteristic in which the amount of water vapor adsorbed is larger than that of the downstream side moisture absorbing portion in a high humidity environment.
The vehicle dehumidifying device according to claim 3, wherein the downstream moisture absorbing portion has an adsorption characteristic in which the amount of water vapor adsorbed is larger than that of the upstream moisture absorbing portion in a low humidity environment. The vehicle dehumidifying device according to claim 3 or 4, wherein the upstream side moisture absorbing portion and the downstream side moisture absorbing portion are configured to be removable from each other. Two sets of the moisture absorbing devices are provided in parallel,
The vehicle dehumidifying device according to any one of claims 1 to 5, wherein each of the moisture absorbing devices is switched between moisture absorption and regeneration alternately.

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