JP2006306293A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of exhibiting an excellent defogging function for a windowpane and maintaining the cabin at a more comfortable humidity environment. <P>SOLUTION: The air conditioner for the vehicle takes in inside air or the inside air and outside air, blows out a part of the air toward the inner surface of the windowpane, and heats other part of the air with a heater core (7) to blow out to an occupant side. The air conditioner uses an adsorption rotor (4) and the air blown out to the windowpane can be dehumidified and the air blowing out to the occupant side can be humidified. The absorption rotor (4) is composed of a cylindrical adsorption element (4A) which supports an adsorbent and has a heater for desorption. The adsorbent of the adsorption element has an adsorption characteristic of 0.15 g/g or more of the difference between adsorption amount at 25% of relative humidity and the adsorption amount at 2% of relative humidity in a steam adsorption isotherm at 25°C. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner that has a built-in adsorption rotor that absorbs and desorbs moisture and can exhibit an excellent anti-fogging function for window glass and a humidifying function for indoors. It is.

  The air conditioner for vehicles has a heating function for the vehicle interior in the cold season and an antifogging function for the window glass. Recently, various air conditioners having an antifogging function improved by using an adsorbent such as silica gel. It is being considered. As such a vehicle air conditioner, for example, a first air passage (antifogging air supply path) extending from an outside air inlet (outside air inlet) to a defroster opening (defroster outlet) and an inside air inlet (inside air introduction) Mouth) to the foot opening (foot outlet), the second air passage (heating air supply passage), the first air passage and the air blowing means (blower) disposed in the second air passage, and the first air A heating heat exchanger (heater core) disposed downstream of the air blowing means in the passage and the second air passage, and further upstream of the inside air inlet, the second inside air inlet (second A first internal air passage (branch path) extending from the second internal air intake port to the first air passage, and in the first internal air passage, the internal air introduced from the second internal air intake port is provided. Dehumidification means for dehumidifying moisture (desiccant unit consisting of adsorbent) Tsu g) can be mentioned air-conditioning device provided.

The vehicle air conditioner as described above is based on the premise that outside air (low-humidity air) is basically introduced in order to blow dry air from the opening of the defroster toward the window glass. In order to avoid a sudden temperature drop in the room, the amount of outside air introduced is reduced by mixing the inside air (warm air) dehumidified with the adsorbent with the outside air in the first air passage (antifogging air supply passage). Is intended. Moreover, it is intended to reduce the heating load by reducing the amount of outside air taken directly into the vehicle.
JP-A-9-156350

  In the vehicle air conditioner using the adsorbent, from the viewpoint of blowing sufficiently dry air on the window glass to enhance the anti-fogging effect, preventing a temperature drop in the room and further saving energy, the window glass A structure in which the inside air circulating in the vehicle is used for substantially the entire amount of the air blown out to the inside of the vehicle and is sufficiently dehumidified by the adsorbent. In addition, if the inside air is humidified by the moisture desorbed at the time of regeneration of the adsorbent, it can be expected to maintain a more comfortable humidity environment in the room.

  However, in the vehicle air conditioner as described above, a part of the air is dehumidified as the defrost air while only the inside air is circulated in the vehicle, and the part of the air is tried to be humidified as the heating air. In this case, a large amount of water must be adsorbed and desorbed by the adsorbent, and in fact, the unit (dehumidifying means) for holding the adsorbent is increased in size. The present invention has been made in view of such circumstances, and an object of the present invention is an air conditioner for a vehicle using an adsorbent, which is excellent in anti-fogging to a window glass without causing a decrease in indoor temperature. An object of the present invention is to provide a vehicle air conditioner that can perform its function and that can maintain the indoor environment in a more comfortable humidity environment.

  In order to solve the above problems, in the present invention, by applying a specific adsorbent capable of adsorbing and desorbing a large amount of water in a low humidity range, the relative humidity circulating in the vehicle during heating is about 25 to 50%. When the inside air of relatively low humidity is blown out to the window glass as defrost air, the moisture is adsorbed and the relative humidity is further reduced to about 20% or less, and the anti-fogging function for the low temperature window glass is exhibited. When the inside air or inside and outside air heated by the core is blown out to the occupant side as heating air, the adsorbent is desorbed and regenerated by a relatively low temperature desorption heater with a temperature of about 70 to 90 ° C so that the inside air is humidified. did. And the adsorption rotor was comprised by the cylindrical adsorption | suction element which carry | supported said adsorption material, and size reduction of the adsorption rotor was attained.

  That is, the gist of the present invention is to take in the inside air or inside air and outside air, blow out a part of the air toward the inner surface of the window glass, heat the other part of the air by the heater core and blow out to the passenger side, An air conditioner for a vehicle that uses an adsorption rotor to dehumidify the air blown out to the window glass and that is capable of humidifying the air blown out to the occupant side. The adsorbing element is formed and carries an adsorbing material, and further includes a desorption heater in the cylinder, the adsorbing element adsorbs moisture of air introduced into the cylinder from the outer peripheral surface portion, and from the inside of the cylinder Moisture in the air blown to the window glass side through the outer peripheral surface portion is further adsorbed, and is heated in advance by the desorption heater and is blown out from the inside of the cylinder to the passenger side through the outer peripheral surface portion. And the adsorbent carried on the adsorption element is the difference between the adsorption amount at 25% relative humidity and the adsorption amount at 2% relative humidity on the 25 ° C. water vapor adsorption isotherm. Is provided with an adsorption characteristic of 0.15 g / g or more.

Another aspect of the present invention is to take in the inside air or inside air and outside air, blow out a part of the air toward the inner surface of the window glass, and heat the other part of the air by the heater core to blow out to the passenger side. And an air conditioner for a vehicle that uses an adsorption rotor to dehumidify the air blown to the window glass and to humidify the air blown to the occupant side. The adsorbing element is formed in a shape and carries an adsorbent, and further includes a desorption heater in the cylinder, the adsorbing element adsorbs moisture of air introduced into the cylinder from the outer peripheral surface portion, and the cylinder Moisture in the air blown to the window glass side from the inside through the outer peripheral surface portion is further adsorbed, and is heated in advance by the desorption heater and is blown out from the inside of the cylinder to the passenger side through the outer peripheral surface portion. Is configured so as to desorb the amount and the suction element, the difference is 0.015 g / cm and the amount of adsorption of the adsorption amount and a relative humidity of 2% at a relative humidity of 25% at a water vapor adsorption isotherm of 25 ° C. It exists in the vehicle air conditioner provided with the adsorption | suction characteristic of ³ or more.

  According to the vehicle air conditioner of the present invention, the adsorption rotor is constituted by the adsorption element carrying the specific adsorbent capable of adsorbing and desorbing a large amount of water in a low humidity range, and the adsorption rotor can be downsized. Since the air containing at least the inside air taken into the apparatus can be dehumidified, and part of the air can be dehumidified and blown out to the window glass as defrost air, so that the window temperature can be reduced without causing a decrease in room temperature. Excellent anti-fogging function for glass can be exhibited, and other part of the air taken in can be humidified with moisture desorbed by the adsorption rotor and blown out to the passenger side as heating air. Can be maintained in a more comfortable humidity environment.

  DESCRIPTION OF EMBODIMENTS An embodiment of a vehicle air conditioner according to the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing main components of one embodiment of the vehicle air conditioner according to the present invention, and FIG. 2 shows main components of another embodiment of the vehicle air conditioner according to the present invention. It is a longitudinal cross-sectional view shown. FIG. 3 is a perspective view showing an embodiment of the structure of the adsorption element constituting the adsorption rotor, and FIG. 4 is a perspective view showing a manufacturing method of the honeycomb structure of one embodiment as a base material of the adsorption element. is there. Furthermore, FIG. 5 is a water vapor adsorption isotherm showing the adsorption characteristics of the adsorbent. In the following description of the embodiment, the vehicle air conditioner is abbreviated as “air conditioner”.

  The air conditioner of the present invention is an air conditioner having a heating function in a vehicle cabin and an anti-fogging function of a window glass. As shown in FIGS. 1 and 2, such an air conditioner takes in the inside air (indoor air) or inside and outside air, blows out a part of the air toward the inner surface of the window glass, and the other part of the air. Is heated by the heater core (7) and blown out to the occupant side, and using the adsorption rotor (4), the air blown out to the window glass can be dehumidified and the air blown out to the occupant side can be humidified.

  The apparatus configuration will be described in detail. The air conditioner according to the present invention is different from the first mode as shown in FIG. 1 according to the arrangement of the suction rotor (4) for dehumidification and humidification and the difference in the configuration of the ventilation path. A second embodiment as shown in FIG.

  First, the 1st aspect of the air conditioner of this invention is demonstrated. As shown in FIG. 1, the air conditioner of the present invention is provided with an inside air inlet (21), an outside air inlet (22), a defroster outlet (23), a face outlet (24), and a foot outlet (25). The sealed casing (1) is used. As the casing (1), various shapes such as a horizontal type, a center type, and a semi-center type can be adopted. In FIG. 1, as an example, a semi-center type air conditioner is used. The casing is shown in a simplified manner.

  The front end portion of the casing (1) is provided with an inside air introduction port (21) for taking in the inside air and an outside air introduction port (22) for taking in outside air for ventilation. The inside air introduction port (21) and the outside air introduction port (22) are usually provided by using a common duct attached to the front end of the casing (1), and the outside air introduction port (22) is provided as an intake door (22d). ) So that the opening degree can be adjusted. In order to maintain the temperature and humidity in the vehicle and maintain comfort, an internal air circulation system is preferable, and only the internal air inlet (21) may be provided at the front end of the casing (1).

  At the rear end of the casing (1), a defroster outlet (23) for blowing the taken-in inside air or the taken-in inside air and outside air to the window glass in the vehicle is provided upward. Such a defroster outlet (23) is comprised so that an opening degree can be adjusted with a defroster door (23d).

  Furthermore, a face outlet (24) and a foot outlet (25) for blowing out the above-mentioned inside air or inside air and outside air to the occupant side are provided at the rear end of the casing (1) in a rearward and downward direction, respectively. . The face outlet (24) blows air into the room through a center outlet and a side outlet (not shown) of the dash panel. The foot outlet (25) blows air to the floor side of the front seat or blows air to the floor side of the rear seat via a rear duct (not shown) depending on the interior specifications. The face outlet (24) and the foot outlet (25) are configured such that the opening degree can be adjusted by the face door (24d) and the foot door (25d), respectively.

  The intake door (22d), the defroster door (23d), the face door (24d), and the foot door (25d) are doors for setting the air volume distribution at each outlet, and these doors are heater control cables or It is connected via a sub-link to a main link operated by a servo motor. The operating angle of the main link is controlled according to the selected mode (FACE, B / L (bi-level), FOOT, F / D (foot / diff), DEF mode), and the opening degree thereof. Is configured to be determined.

  The inside of the casing (1) extends from the inside air inlet (21) and the outside air inlet (22) to the defroster outlet (23), the face outlet (24) and the foot outlet (25), and the blower (3) The evaporator (6), the heater core (7), and the adsorption rotor (4) are configured as a ventilation path arranged sequentially from the upstream side.

  The blower (3) is disposed at the front end portion of the casing (1) with the intake port directed toward the internal air introduction port (21) and the external air introduction port (22) in order to take in the internal air or the internal air and the external air. As the blower (3), in addition to a centrifugal blower as illustrated in the figure, a blower such as a once-through type can be used. Reference numeral (31) denotes a motor of the blower (3).

  In an air conditioner, an evaporator (6) of a cooling device is usually arranged downstream of the blower (3) in order to cool the room in summer or the like. The evaporator (6) is connected to the compressor in the engine room that condenses the heat medium compressed by the compressor by heat exchange with the outside air and the compressor, and heat exchange of the condensed heat medium with air is performed. It is a heat exchanger for generating cold with a breathable structure that evaporates by heat. A drain pipe (9) for discharging water condensed on the surface of the evaporator (6) to the outside of the vehicle is attached to the lower surface of the casing (1) below the evaporator (6).

  A heater core (7) of the heating mechanism is disposed on the downstream side of the evaporator (6). As is well known, the heater core (7) is a heat exchanger that has a ventable structure and heats the air by circulating cooling water of the engine. At the front end of the heater core (7), an air mix damper (80) whose opening degree is controlled by operation of an instrument panel temperature adjusting lever or switch is provided. The air mix damper (80) has a function of changing the balance between the flow rate of air passing through the heater core (7) and the flow rate of air not passing through the air passage, and adjusting the temperature of the air blown out from each of the blowout ports. Have Note that, depending on the control of the air mix damper (80), there may be a case where substantially the entire amount of air in the air passage is allowed to pass through the heater core (7) or a case where substantially the entire amount of air is not allowed to pass.

  An adsorption rotor (4) is disposed on the downstream side of the heater core (7), that is, on the rear end side of the casing (1). Such an adsorption rotor (4) is formed of an adsorbing element (4A) (see FIG. 3) formed in a cylindrical shape whose peripheral surface portion can be ventilated and carrying an adsorbing material, and is attached to and detached from the cylinder of the adsorbing element. Heater (5). The adsorption rotor (4) is a so-called rotatable desiccant rotor that adsorbs and desorbs moisture with an adsorbent, and a cylindrical adsorbing element (4A) (see FIG. 3) includes a sealing disc with a shaft protruding in the center. ), And the shaft is pivotally supported by bearings (not shown) attached to the side wall of the casing (1). And the adsorption | suction rotor (4) is comprised so that it may rotate to one direction with the rotation speed of about 20-80 times / h by the drive motor (illustration omitted) attached to the casing (1).

  In the ventilation path in the casing (1), the region where the adsorption rotor (4) is arranged, that is, the rear end side in the casing (1) is a first adsorption region (1a) to which air is supplied from the upstream side, Divided into three areas: a second adsorption area (1b) where air is discharged to the defroster outlet (23), a desorption area (1c) where air is discharged to the face outlet (24) and the foot outlet (25). In the adsorption rotor (4), portions substantially corresponding to the areas of 1/6 to 1/2 of the entire outer peripheral surface are the first adsorption region (1a), the second adsorption region (1b), and the desorption region. They are arranged in the center of these areas so as to be located in (1c). The first adsorption region (1a), the second adsorption region (1b), and the desorption region (1c) are regions where the adsorption element (4A) of the adsorption rotor (4) exhibits an adsorption function and a desorption function, respectively.

  Specifically, the air passage in the casing (1) on the downstream side of the heater core (7) has a structure in which a cross section perpendicular to the air flow direction is reduced by, for example, a throttle portion (13). The suction region (1a) is divided into a configuration in which an outer peripheral surface corresponding to an area of 1/6 to 1/2 of the suction rotor (4) directed upstream is disposed close to the throttle portion (13). Is done. The second suction region (1b) has an outer peripheral surface corresponding to an area of 1/6 to 1/2 of the suction rotor (4) oriented substantially upward, and the throttle portion (13) on the upper side of the casing (1). And the rear end wall (14) of the casing (1) are arranged close to each other, and the desorption region (1c) is 1/6 to 1 of the adsorption rotor (4) oriented substantially downward. The outer peripheral surface corresponding to the area of / 2 is defined by being arranged close to the throttle part (13) on the lower side of the casing (1) and the rear end wall (14) of the casing (1).

  On the other hand, the adsorption element (4A) of the adsorption rotor (4) includes a desorption heater (5) in the cylinder. The desorption heater (5) is arranged to face the inner peripheral surface of the portion located in the desorption region (1c) of the adsorption element (4A), and in the cylinder of the adsorption element (4A) in the desorption region (1c) The air passing from the outer surface to the outer peripheral surface side is heated. As the detachable heater (5), a heat exchanger connected to a heating mechanism of the same system as a heater core (7), which will be described later, or circulating an engine coolant, or an electric heater is used. In addition, the desorption heater (5) has a structure that allows ventilation, in order to heat the air that passes through the cylinder of the adsorption element (4A).

  The adsorbing element (4A) adsorbs moisture of air introduced into the cylinder from the outer peripheral surface portion of the adsorbing element in the first adsorbing region (1a) while rotating clockwise in the drawing, In the second adsorption region (1b), moisture is further adsorbed from the air (air flowing to the defroster outlet (23)) blown from the cylinder of the adsorption element to the window glass side through the outer peripheral surface portion, and the desorption region ( 1c), air preheated by the desorption heater (5) and blown out from the cylinder of the adsorption element to the occupant side through the outer peripheral surface (air flowing to the face blowout port (24) and the foot blowout port (25)) Is configured to desorb moisture. Further, the adsorption element (4A) may be configured to rotate counterclockwise in the drawing, and in that case, after the moisture is desorbed in the desorption region (1c), the first adsorption region (1b) is first formed. ) Is adsorbed in this manner, so that it becomes easier to adsorb moisture from the air blown to the window glass side. The specific structure of the adsorption element (4A) constituting the adsorption rotor (4) and the adsorbent carried thereon will be described later.

  The air conditioner of the present invention takes in the inside air from the inside air introduction port (21) by the operation of the blower (3) when heating the inside of the vehicle in the cold season or the like, and when the room needs ventilation, the outside air introduction port. Intake outside air from (22). In the apparatus, for example, when the blower (3) supplies the introduced inside air to the air passage in the casing (1), the heater core (7) heats the air in the air passage as necessary, and The defroster outlet (23) provided at the rear end of the casing (1) blows warm air toward the inner surface of the window glass, and the face outlet (24) and the foot outlet (25) are directed toward the passenger. Warm air is blown out to heat the interior.

  At that time, in the air conditioner of the present invention, the adsorption rotor (4) rotating at a constant speed as described above is arranged on the downstream side of the heater core (7) of the air passage, and the adsorption rotor (4) is adsorbed. The element (4A) adsorbs moisture of air flowing into the cylinder from the outer peripheral surface portion of the adsorption element in the first adsorption area (1a), and further from the cylinder of the adsorption element in the second adsorption area (1b). The moisture of the air flowing out to the outer peripheral surface is adsorbed. Accordingly, dry air is generated in the second adsorption region (1b), and such air is blown out as defrost air toward the window glass through the defroster outlet (23).

  On the other hand, a desorption heater (5) is arranged in the cylinder of the adsorption element (4A), and the desorption heater (5) is arranged on the outer peripheral surface portion from the inside of the adsorption element (4A) in the desorption area (1c). Heat outflowing air. Thus, the adsorption element (4A) desorbs the moisture previously adsorbed in the first adsorption region (1a) and the second adsorption region (1b) in the desorption region (1c). Accordingly, warm and humid air is generated in the desorption region (1c), and such air is blown out as heating air toward the passenger through the face blowout port (24) and the foot blowout port (25).

  Then, the 2nd aspect of the air conditioner of this invention is demonstrated. As shown in FIG. 2, the air conditioner of the present invention is provided with an inside air inlet (21), an outside air inlet (22), a defroster outlet (23), a face outlet (24), and a foot outlet (25). The sealed casing (1) is used. The casing (1) is configured, for example, as a semi-centered type as in the above-described embodiment. Configuration of inside air introduction port (21), outside air introduction port (22), defroster outlet (23), face outlet (24) and foot outlet (25), intake door (22d), defroster door (23d) The configurations of the face door (24d) and the foot outlet (25) are the same as those in the above-described embodiment.

  The inside of the casing (1) extends from the inside air inlet (21) and the outside air inlet (22) to the defroster outlet (23), the face outlet (24) and the foot outlet (25), and the blower (3 ), An evaporator (6), an adsorption rotor (4), and a heater core (7) are configured as a ventilation path arranged sequentially from the upstream side. That is, the second mode is different from the first mode in that the adsorption rotor (4) is arranged on the upstream side of the heater core (7).

  Further, the air passage on the downstream side of the adsorption rotor (4) is divided into two upper and lower flow paths by the partition wall (10). That is, on the downstream side of the adsorption rotor (4), an antifogging air supply path (11) from the second adsorption area (1b), which will be described later, to the defroster outlet (23) in the area where the adsorption rotor (4) is disposed. ) And a heating air supply path (12) from a desorption region (1c), which will be described later, to the face air outlet (24) and the foot air outlet (25), are provided. And said heater core (7) is arrange | positioned ranging over the antifogging supply path (11) and the heating supply path (12).

  At the front end of the heater core (7), air mix dampers (81) and (82) for adjusting the air flow rate of the heater core (7) by operating the temperature control lever or switch of the instrument panel are provided. The air mix damper (81) changes the balance between the flow rate of air that passes through the heater core (7) and the flow rate of air that does not pass by being controlled in opening degree in the antifogging air supply passage (11). And a function of adjusting the mixing ratio of each air in the downstream portion of the antifogging air supply passage (11).

  Similarly, the air mix damper (82) is controlled in the heating air supply passage (12) so that the air mixing damper (82) is heated for supplying air that passes through the heater core (7) and air that does not pass through the heater core (7). The path (12) has a function of adjusting the mixing ratio in the downstream portion. In the antifogging air supply passage (11) and the heating air supply passage (12), the heater core (7) is controlled by controlling the opening degree of the air mix damper (81) and the air mix damper (82), respectively. On the other hand, there are cases where the entire amount of air in the air supply passage is allowed to pass or where the entire amount of air is not allowed to pass.

  On the other hand, in the ventilation path in the casing (1), the region where the adsorption rotor (4) is arranged, that is, the substantially central portion in the casing (1) is the first adsorption region (1a) to which air is supplied from the upstream side. ), A second adsorption region (1b) through which air is discharged to the antifogging air supply passage (11), and a desorption region (1c) through which air is discharged to the heating air supply passage (12). In the same manner as in the above-described embodiment, the suction rotor (4) has portions substantially corresponding to the areas of 1/6 to 1/2 of the entire outer peripheral surface of the suction rotor (1a). ) And the second adsorption region (1b) and the desorption region (1c).

  Specifically, the air passage on the downstream side of the evaporator (6) has a structure in which a cross section perpendicular to the air flow direction is reduced by, for example, a throttle portion (13), and the first adsorption region (1a) includes: An outer peripheral surface portion corresponding to an area of 1/6 to 1/2 of the suction rotor (4) directed to the upstream side is partitioned and configured close to the throttle portion (13). Further, the second suction region (1b) has an outer peripheral surface portion corresponding to an area of 1/6 to 1/2 of the suction rotor (4) directed substantially upward, and the throttle portion (13) on the upper side of the casing (1). And the partition wall (10) are arranged close to each other, and the desorption region (1c) is an area of 1/6 to 1/2 of the adsorption rotor (4) oriented substantially downward The outer peripheral surface portion corresponding to is partitioned by the tip of the partition wall (10) and the throttle portion (13) on the lower side of the casing (1).

  The adsorbing element (4A) of the adsorbing rotor (4) is provided with a desorption heater (5) in its cylinder, as in the above-described embodiment, and rotates clockwise in the figure, for example. However, in the first adsorption region (1a), moisture of the air introduced into the cylinder from the outer peripheral surface portion of the adsorption element is adsorbed, and in the second adsorption region (1b), the outer periphery from the cylinder of the adsorption element. Moisture in the air blown out to the window glass side through the face part (air blown out to the defroster outlet (23)) is further adsorbed and preheated by the desorption heater (5) in the desorption region (1c). Moisture is desorbed by air blown from the cylinder of the adsorption element to the occupant side through the outer peripheral surface (air blown to the face blowout port (24) and the foot blowout port (25)). That. The configurations of the evaporator (6), the adsorption rotor (4), the heater core (7), and the desorption heater (5) in the cylinder of the adsorption element (4A) are the same as those described above.

  The air conditioner of the present invention as described above takes in the inside air from the inside air introduction port (21) by the operation of the blower (3) when the inside of the vehicle is heated in the cold season or the like. When it is desired to lower the humidity, outside air is also taken in from the outside air inlet (22). In the apparatus, for example, when the blower (3) supplies the introduced inside air to the ventilation path in the casing (1), the heater core (7) passes through the antifogging supply path (11) as necessary. And the air passing through the heating air supply passage (12) are heated, and the defroster outlet (23) provided at the rear end of the casing (1) is warm air toward the inner surface of the window glass. , The face outlet (24) and the foot outlet (25) blow warm air toward the occupant to heat the interior of the vehicle.

  At that time, in the air conditioner of the present invention, the adsorption rotor (4) that rotates at a constant speed is disposed upstream of the heater core (7) of the air passage, and the adsorption element (4A) of the adsorption rotor (4) In the first adsorption region (1a), moisture in the air flowing into the cylinder from the outer peripheral surface portion of the adsorption element is adsorbed, and further, in the second adsorption region (1b), it flows out from the cylinder of the adsorption element to the outer peripheral surface portion. Adsorbs moisture from the air. Accordingly, dry air is generated in the second adsorption region (1b), and such air is blown out as defrost air toward the window glass through the antifogging air supply path (11) and the defroster outlet (23). .

  In addition, a desorption heater (5) is arranged in the cylinder of the adsorption element (4A), and the desorption heater (5) is arranged in the desorption region (1c) from the cylinder of the adsorption element (4A) to the outer peripheral surface portion. Heat outflowing air. Thereby, the adsorption element (4A) desorbs the moisture previously adsorbed in the first adsorption region (1a) and the second adsorption region (1b) in the desorption region (1c). Accordingly, warm and humid air is generated in the desorption region (1c), and such air is directed toward the passenger through the heating air supply passage (12), the face outlet (24) and the foot outlet (25). It is blown out as heating air.

  In the present invention, in both the first and second aspects as described above, for example, the inside air (or the inside air and the outside air) blown out as defrost air from the defroster outlet (23) to the window glass is sufficiently dehumidified. The adsorbent carried on the adsorption element (4A) of the adsorption rotor (4) in order to effectively humidify the inside air blown out as heating air from the face blowout opening (24) and the foot blowout opening (25) to the passenger side Must have the following specific adsorption characteristics:

  That is, the inside air that circulates inside the vehicle during heating in the cold season, or the inside air that partially includes outside air has a relatively low humidity of about 25 to 50% when the temperature is 25 ° C., In order to achieve the anti-fogging effect on the window glass at a low temperature (for example, 5 ° C.) using the above-mentioned inside air as the defrost air, the adsorbent sufficiently adsorbs moisture even at such low humidity, and the inside air It is necessary to have a characteristic that can further reduce the relative humidity to about 20% or less.

  On the other hand, in the regeneration of the adsorbent, the desorption heater (5) using engine cooling water or an electric heater is used as described above, but in order to reduce fuel consumption and battery consumption, the adsorbent is used. Must be able to desorb moisture at a relatively low temperature of 90 ° C. or lower, preferably 70 ° C. or lower. When the inside of the vehicle is in a moderately comfortable state, for example, when the temperature of the air inside the vehicle is 25 ° C. and the humidity is 50%, the inside air to be circulated through the heating air supply path (12) is removed and removed (5) The relative humidity when heated to 90 ° C. is 2%, and the relative humidity when heated to 70 ° C. is 4%. Therefore, the adsorbent must have a characteristic that can be easily adsorbed and desorbed when the relative humidity is in the range of 2 to 25%, preferably in the range of 4 to 25%.

Further, the amount of adsorption / desorption required for the adsorbent is as follows. That is, the circulation amount of the air in the vehicle (the circulation amount of the inside air) is usually about 400 m ³ / h in a large case, and a part of the taken in air is blown out from the defroster outlet (23) to the window glass. When part of the air is blown out from the face outlet (24) and the foot outlet (25) to the occupant side, the window glass usually has 20 to 30% of the circulation amount of the inside air, in other words, 120 m ³ / h of air. Is blown out. At that time, if the temperature of the window glass is 5 ° C., in order to prevent the condensation of the window glass, the air blown to the window glass side is dehumidified to an absolute humidity of 5 ° C. or less in a saturated state of 5 ° C. Need to be. As described above, if the temperature of the inside air is 25 ° C. and the humidity is 50%, the absolute humidity of the air is 9.8 g / kg, so that the air of 120 m ³ / h (= 15.5 kg / h) It is necessary to dehumidify more than 4.8 g / kg. That is, about 750 g / h of water must be adsorbed by the adsorbent.

On the other hand, assuming that the rotation speed of the adsorption rotor (4) is set to 50 times / h, it is necessary to adsorb approximately 15 g of water by the adsorbent of the adsorption element (4A) while the adsorption rotor (4) rotates once. is there. Moreover, the adsorption rotor (4) needs to be further miniaturized in order to be incorporated into the casing (1), and the effective volume (described later, carrying the adsorbent) in the adsorption element (4A) of the adsorption rotor (4). When the apparent volume of the honeycomb structure is designed to be 1000 cm ³ , the mass of the adsorbent that can be carried on the adsorption element (4A) (honeycomb structure) is about 100 g. Therefore, the adsorbent requires an adsorption amount of at least 0.15 g / g, in other words, an adsorption / desorption amount.

  That is, in the present invention, the adsorbent carried on the adsorption element (4A) of the adsorption rotor (4) has an adsorption amount at a relative humidity of 25% and an adsorption amount at a relative humidity of 2% on a water vapor adsorption isotherm at 25 ° C. It is necessary to have adsorption characteristics with a difference of 0.15 g / g or more. Preferably, the difference between the adsorption amount at 25% relative humidity and the adsorption amount at 4% relative humidity is 0.15 g / g or more.

Further, as described above, from the effective volume of the adsorption element (4A), in the present invention, the adsorption element (4A) of the adsorption rotor (4) carrying the adsorbent is the relative humidity in the water vapor adsorption isotherm at 25 ° C. The difference between the adsorption amount at 25% and the adsorption amount at 2% relative humidity must be 0.015 g / cm ³ or more. Preferably, the difference between the adsorption amount at a relative humidity of 25% and the adsorption amount at a relative humidity of 4% is 0.015 g / cm ³ or more. However, in this case, the adsorption amount is the adsorption amount per unit apparent volume (the volume including the volume of the internal vent hole) of the adsorption element (4A) carrying the adsorbent.

  In the present invention, the adsorbent satisfying the above characteristics includes zeolite that can easily adsorb water vapor at a low humidity and can easily desorb at a low temperature. Examples of such zeolite include FAU type aluminosilicates and aluminophosphates having a silica / alumina ratio of 2.5 or more, and in particular, crystalline aluminophosphates containing at least Al and P in the skeleton structure. preferable. From the viewpoint of increasing the diffusion of water vapor in the individual particles of the adsorbent, the average particle size of the adsorbent particles is usually 0.1 to 300 μm, preferably 0.5 to 250 μm, more preferably 1 to 200 μm, Most preferably, it is 2-100 micrometers.

  The above aluminophosphates (hereinafter abbreviated as ALPOs as appropriate) are crystalline aluminophosphates defined by IZA (International Zeolite Association). In the crystalline aluminophosphate, atoms constituting the skeletal structure are aluminum and phosphorus, and a part thereof may be substituted with other atoms. Among these, from the viewpoint of adsorption characteristics, (I) Me-aluminophosphate in which aluminum is partially substituted with a heteroatom Me1 (where Me1 belongs to the third or fourth period of the periodic table, 2A group, 7A group, 8 Group, 1B group, 2B group, 3B group (except at least one element selected from Al), (II) Me-aluminophosphate in which phosphorus is substituted with hetero atom Me2 (where Me2 is a period) 4B group elements belonging to the third or fourth period of the table) or (III) Me-aluminophosphate in which both aluminum and phosphorus are substituted with heteroatoms Me1 and Me2, respectively.

  Me may be contained alone or in combination of two or more. Preferable Me (Me1, Me2) is an element belonging to the third and fourth periods of the periodic table. Me1 preferably has an ionic radius of 3 to 0.8 nm in a divalent state, and more preferably has an ionic radius of 0.4 to 7 nm in a divalent and tetracoordinate state. Among these, at least one element selected from Fe, Co, Mg, and Zn is preferable from the viewpoint of ease of synthesis and adsorption characteristics, and Fe is particularly preferable. Me2 is a group 4B element belonging to the third or fourth period of the periodic table, and is preferably Si.

Further, as the aluminophosphates, those having a framework density (FD) of 13 T / nm ³ or more and 20 T / nm ³ or less are usually used. The lower limit of the framework density is preferably 13.5 T / nm ³ or more, and more preferably 14 T / nm ³ or more. On the other hand, the upper limit of the framework density is preferably 19 T / nm ³ or less. If the framework density is less than the above range, the structure tends to be unstable, and the durability is lowered. On the other hand, if the framework density exceeds the above range, the adsorption capacity becomes small and it is not suitable for use as an adsorbent. The framework density (unit: T / nm ³ ) means T atoms (number of elements constituting a skeleton other than oxygen per 1 nm ^{3 of} zeolite) present per unit volume (nm ³ ).

  The structure of aluminophosphates includes AEI, AEL, AET, AFI, AFN, AFR, AFS, AFT, AFX, ATO, ATS, CHA, ERI, LEV, and VFI, as indicated by the code defined by IZA. Among these, from the viewpoint of adsorption characteristics and durability, those having an AEI, AEL, AFI, CHA, and LEV structure are preferable, and those having an AFI and CHA structure are particularly preferable.

  Among the above aluminophosphates, SAPO-34 and FAPO-5 are particularly preferable as the adsorbent. One or two or more kinds of ALPOs can also be used in combination. The production conditions of FAPO and SAPO are not particularly limited, but are usually produced by hydrothermal synthesis after mixing an aluminum source, a phosphorus source, and a Me source such as Si and Fe as required, and a template. Is done. ALPOs can be synthesized using known synthesis methods described in, for example, JP-B-1-57041, JP-A-2003-183020, JP-A-2004-136269, and the like.

Incidentally, an adsorbent suitable for the air conditioner of the present invention, such as crystalline silicoaluminophosphate (SAPO-34), has an adsorption characteristic as shown by a solid line in FIG. , The amount of adsorption changes rapidly between 2% relative humidity and 25% relative humidity, and the difference (δ ₁ ) is 0.15 g / g or more. On the other hand, conventional adsorbents such as A-type silica gel and activated carbon have adsorption characteristics as indicated by broken lines in FIG. 5, and a relative humidity of 25% relative to a relative humidity of 25% in a 25 ° C. water vapor adsorption isotherm. %, The difference in adsorption amount is small, and the difference (δ ₂ ) is about ½ or less of SAPO-34. That is, the adsorbent applied to the present invention has a characteristic of adsorbing and desorbing more water in a low humidity range.

  By the way, in the air conditioner of the present invention, the adsorbing element (4A) constituting the adsorbing rotor (4) is excellent in air permeability and has high contact efficiency between the passing air and the adsorbing material carried. The thing of the structure which can fully exhibit adsorption | suction performance is desired. And what can be manufactured at lower cost is desirable.

  From the above viewpoint, in the air conditioner of the present invention, an element having a specific structure is used as the adsorption element (4A) of the adsorption rotor (4). The shape and size of the ventilation cells (holes) provided on the peripheral surface of the adsorption rotor (4) are not preferable at random. In other words, the adsorbing element (4A) preferably has a ventilation cell having a substantially triangular or hexagonal opening. The adsorption element (4A) in which the opening shape of the cell is formed in a substantially triangular shape has a structure in which a substantially corrugated sheet and a flat sheet are laminated. For example, the corrugated sheet and the flat sheet are laminated. A rectangular parallelepiped laminate, and a method of connecting a plurality of the laminates in an annular shape to form a cylindrical rotor, or a plurality of corrugated sheets and flat sheets formed in each disk shape Manufactured by a method of forming a cylindrical rotor by stacking layers. The adsorbing element (4A) may have a substantially triangular cell opening shape as described above, but a complicated manufacturing process is required to make a rotor with a uniform shape and no gaps in the joints. It becomes.

  Therefore, in a preferred embodiment of the present invention, the adsorption rotor (4) is configured using the adsorption element (4A) in which the opening shape of the cell is formed in a substantially hexagonal shape. That is, as shown in FIG. 3, the adsorbing element (4A) is configured by supporting an adsorbent on a cylindrical honeycomb structure (40) having a large number of ventilation cells (4c) on the peripheral surface, In the adsorption element (4A), the honeycomb structure (40) has a structure in which only the substantially corrugated sheet (45) is laminated along the circumferential direction, so that each cell (4c) The opening shape is formed in a substantially hexagonal shape.

  The honeycomb structure (40) constituting the adsorption element (4A) has a substantially corrugated sheet (45) formed in a strip shape and bent in a zigzag manner with respect to the longitudinal direction thereof. A structure in which a large number of layers are laminated along the circumferential direction so as to be aligned in parallel with the axis of the honeycomb structure is provided. In the cell (4c) formed on the peripheral surface of the honeycomb structure (40), the convex portions of the adjacent substantially corrugated sheet (45) have a predetermined width (the linear joint portion (43) described later). The opening shape is formed in a substantially hexagonal shape. In the honeycomb structure (40), the arrangement direction (X) of the cells (4c) formed by the adjacent substantially corrugated sheet (45) is the direction along the longitudinal direction of the sheet (45), that is, The direction along the axis of the honeycomb structure.

  The honeycomb structure (40) is formed by laminating a large number of sheets (45) formed in a rectangular flat plate shape (for example, a belt shape), and at a constant pitch parallel to one side of the sheet on the front and back of each sheet (45). In addition, a laminated body (44) (FIG. 4) formed by joining adjacent sheets (45) to each other in a large number of linear joints (43) (see FIG. 4) set in a state shifted by 1/2 pitch on the front and back sides. When this is expanded, the laminated body (44) is developed so as to curve two parallel laminated surfaces on the side where the cells (4c) are opened.

  The manufacturing method of the honeycomb structure (40) and the adsorption element (4A) will be described more specifically with reference to FIG. 4. To manufacture the honeycomb structure (40), first, as shown in FIG. And preparing a flat sheet (42) large enough to produce a large number of honeycomb structures (40), laminating them, and joining the adjacent flat sheets (42) at predetermined sites. To do.

  The flat sheet (42) is finally formed into the substantially corrugated sheet (45) described above, and the flat sheet (42) holds a powdery adsorbent. A fiber sheet with the flexibility to obtain is used. The fibrous sheet refers to a sheet made of an aggregate of inorganic or organic fibrous substances, and the fibrous substances may be intertwined with each other. For example, fillers having a large aspect ratio, nonwoven fabrics, and the like are also included in the concept of “fibrous”. By using the fibrous sheet as described above, adsorption elements (4A) of various sizes can be easily manufactured, and the vibration resistance of the adsorption elements (4A) can be improved.

  Specifically, the constituent material of the fibrous sheet includes ceramic fibers mainly composed of silica / alumina, glass fibers, carbon fibers produced from raw materials containing carbon such as PAN and tar, and fibrous clay substances. And mineral fibers, organic silicon fibers manufactured from organosilicon polymers, metal fibers manufactured from metals such as Fe, Cu, Al, Cr, and Ni. Examples of the chemical fiber include fibers such as acrylic, polyethylene, polypropylene, polyurethane, polyclar, nylon, rayon, vinylon, vinylidene, polyvinyl chloride, acetate, and polyester. Natural fibers such as cellulose, silk, and cotton can also be used.

  In particular, in consideration of moldability, handleability, and manufacturing cost, the material for the fibrous sheet is preferably a nonwoven fabric. Examples of such a nonwoven fabric include chemical fiber-based nonwoven fabrics such as rayon, nylon, polyester, polyethylene, polypropylene, acrylic, vinylon, cupra, and aromatic polyamide. The chemical fiber nonwoven fabric as described above may be either a single fiber or a laminate of two or more fibers. As is well known, the nonwoven fabric is manufactured by a manufacturing method such as a wet method, a dry method, a spun bond method, a melt blow method, a chemical bond method, a thermal bond method, or a needle punch method. The normal thickness of the fibrous sheet is usually 40 to 600 μm, preferably 50 to 400 μm.

  The flat sheet (42) shown to Fig.4 (a) is laminated | stacked about 100-1000 sheets, for example according to the magnitude | size of a honeycomb structure (40) and the magnitude | size of a cell (4c). Each flat sheet (42) is sequentially laminated with respect to each adjacent sheet (42) by a bonding method according to a material such as heat welding, ultrasonic welding, or adhesion using an adhesive. Joined at a predetermined site. In the flat sheet (42), as a joint portion with each adjacent sheet (42), the front and back of each sheet (42) are shifted at a constant pitch parallel to one side of the sheet and ½ pitch on the front and back. A number of linear joints (43) are set. The interval between the linear joint portions (43) on one surface of the sheet (42) is about 2 to 15 mm. When the linear joint portion (43) is set at the above-described interval, one cell (4c) Can be formed in a cell having a maximum diagonal of about 3 to 25 mm.

  After laminating the flat sheet (42), as shown in FIG. 4 (b), the sheet on each end face on the laminating direction side is flat, for example, in the form of a belt having a length (L) and a width (W). The laminate of the sheet-like sheets (42) is cut to produce a rectangular parallelepiped laminate (44). That is, in the laminate (44), a large number of strip-like sheets (45) having a predetermined size formed from the flat sheet (42) are laminated, and each adjacent sheet (45) is the linear joint (43). Are joined together. The length (L) in the laminated body (44) corresponds to the axial length of the honeycomb structure (40), and the width (W) is the difference between the outer diameter and the inner diameter (cylinder thickness) of the honeycomb structure (40). Equivalent to. Although it differs depending on the air conditioner to which the adsorption element (4A) is applied, the size of the honeycomb structure (40), that is, the size of the laminate (44) is usually about 60 to 400 mm in length (L). The width (W) is about 10 to 60 mm.

  When the laminate (44) obtained as described above is expanded in the lamination direction (up and down direction in FIG. 4B), each belt-like sheet (45) is deformed into a substantially corrugated plate shape. At the same time, a large number of cells (4c) are opened in two parallel laminated surfaces along the length (L) of the laminated body (44). In addition, the arrow of the code | symbol (Y) in FIG.4 (b) has shown the communication direction of the cell (4c) formed when a laminated body (44) is expanded, and also in the enlarged view of FIG. The arrow of the symbol (X) indicates the longitudinal direction of each sheet (45) and the arrangement direction of the cells (4c) formed by each adjacent sheet (45).

  Therefore, after the laminate (44) is produced as described above, as shown in FIG. 4 (c), the opening of the cell (4c) that appears when the laminate (44) is expanded becomes the honeycomb structure ( 40), in other words, when the laminate (44) is expanded, the laminate (in the state in which the two parallel laminate surfaces on the side where the cells (4c) are opened) are curved. 44) is developed to constitute a cylindrical honeycomb structure (40). That is, when unfolding the laminate (44), the laminate (44) is annularly shaped so that one long side of the belt-like sheet (45) is located on the inner periphery and the other long side is located on the outer periphery. Bend. And the sheet | seat (45) corresponded to the both end surfaces of the lamination direction of a laminated body (44) is joined.

  The honeycomb structure (40) obtained as described above has a structure in which only a substantially corrugated sheet (45) is laminated along the circumferential direction, and the opening shape of each cell (4c) is approximately six. It is formed in a square shape. When the honeycomb structure (40) is manufactured, the laminate (44) is formed by directly laminating a number of strip-shaped sheets (45) formed in advance in length (L) and width (W). In doing so, they may be produced by joining them at the linear joint (43).

  The adsorption element (4A) used for the adsorption rotor (4) is manufactured by impregnating the honeycomb structure (40) with the slurry containing the adsorbent described above and then performing a drying treatment with hot air or the like. The That is, in the present invention, the adsorption element (4A) has a structure in which an adsorbent is fixed to each sheet (45) of the honeycomb structure (40) with a binder.

  Said slurry used for manufacture of an adsorption element (4A) is mainly comprised from solvents, such as adsorption material, a binder, and water, In addition, other substances, such as a stabilizer, may be added. For example, the blending ratio of the above three-component slurry is as follows. That is, the adsorbent is 5 to 60% by weight, the binder is 0.1 to 50% by weight, and the solvent is 30 to 94.9% by weight. Preferably, the adsorbent is 10 to 45% by weight, the binder is 1 to 30% by weight, and the solvent is 40 to 80% by weight. Furthermore, the weight ratio of the solvent to the adsorbent is usually in the range of 1 to 20%, preferably 1.25 to 5%, and it is preferable that the amount of binder does not exceed the amount of adsorbent.

  The reason why the ratios of the adsorbent, binder and solvent in the slurry are defined as described above is as follows. That is, when the ratio of the adsorbent to the solvent exceeds the upper limit, the slurry concentration is too high and the adsorbent may not be impregnated smoothly. On the other hand, if the lower limit is not reached, the amount of adsorbent that can be impregnated at a time is reduced, which is inefficient. Further, when the amount of the binder exceeds the amount of the adsorbent, there is a binder that is not effectively used, which may cause undesirable aggregation of particles. On the other hand, when the value is below the lower limit, the function as a binder cannot be sufficiently achieved.

  The binder for supporting the adsorbent on the honeycomb structure (40) may be either an organic or inorganic binder. Examples of the organic binder include acrylic resin, vinyl acetate resin, and styrene resin. Adhesives in which resin components such as various copolymer resins, olefin resins, epoxy resins, urethane resins, phenol resins, and silicone resins are dissolved in organic solvents, or acrylic resin emulsions, vinyl acetate resin emulsions, and styrene resins Examples thereof include emulsion adhesives obtained by emulsifying resin components such as resin emulsions, various copolymer resin emulsions, olefin resin emulsions, epoxy resin emulsions, urethane resin emulsions, and phenol resin emulsions.

  Various binders can be selected from the viewpoints of slurry stability, heat resistance and slurry viscosity adjustment, and particularly from the viewpoint of thermal stability, an epoxy resin adhesive is used. More specifically, an epoxy resin emulsion adhesive is preferable. Depending on the sheet material and the molding method, two or more kinds of adhesives may be used. Examples of the inorganic binder include silica sol, alumina sol, titania sol, and zirconia sol. Furthermore, in order to improve the heat conduction in the sheet (45), the organic and inorganic binders have good thermal conductivity such as metal fibers, fibrous materials such as carbon fibers, metal powders such as aluminum, copper, and silver. Graphite or the like may be added.

  As described above, the adsorbing element (4A) includes the honeycomb structure (40) having a structure in which only the substantially corrugated sheet (45) is stacked, and a stack of a large number of rectangular flat plates (45). Since the honeycomb structure (40) can be easily produced by expanding the body (44), the manufacturing cost of the adsorption rotor (4) can be further reduced. And since the opening shape of each cell (4c) is formed in the substantially hexagonal shape by said laminated structure in a honeycomb structure (40), adsorption | suction element (4A) raises the ventilation | gas_flowing efficiency in adsorption | suction rotor (4). The adsorption / desorption performance can be further enhanced.

  As described above, in the air conditioner of the present invention, the adsorption rotor (4) is constituted by the adsorption element (4A) carrying a specific adsorbent capable of adsorbing and desorbing a large amount of moisture in a low humidity range. When the apparatus is operated as described above, the adsorbent of the adsorbing element (4A) adsorbs moisture from the inside air whose relative humidity circulates in the vehicle is about 25%, and further reduces the relative humidity to about 20% or less. Then, it is desorbed and regenerated by a relatively low temperature desorption heater (5) having a temperature of about 70 ° C.

  Therefore, according to the vehicle air conditioner of the present invention, it is possible to further reduce the size of the adsorption rotor (4), dehumidify air containing at least the inside air taken into the device, and further dehumidify part of the air. Since it can be blown out to the window glass as defrost air, it can exhibit an excellent anti-fogging function for the window glass without causing a decrease in the indoor temperature. Since it can be humidified by the moisture desorbed by the adsorption rotor (4) and blown out to the occupant side as heating air, the interior of the room can be maintained in a more comfortable humidity environment.

  SAPO-34 was synthesized as an example of an adsorbent suitable for the present invention, and its adsorption characteristics were confirmed. FIG. 6 is a 25 ° C. water vapor adsorption isotherm showing the actual adsorption characteristics of the adsorbent suitable for the air conditioner of the present invention and the adsorbent of the comparative example.

Example 1:
84.7 g of 85% phosphoric acid was added to 180 g of water, 57.2 g of pseudoboehmite (containing 25% water, manufactured by Condea) was slowly added thereto, and the mixture was stirred for 3 hours to obtain Liquid A. Separately from the liquid A, 6.3 g of fumed silica (Aerosil 200), 36.6 g of morpholine, and 240 g of water were mixed and prepared, and the liquid mixture was slowly added to the liquid A. Further, 47.0 g of triethylamine was added, and this was stirred for 3 hours to obtain an aqueous gel. The mixture thus obtained was charged into a 1 liter stainless steel autoclave containing a fluororesin inner cylinder and reacted at 190 ° C. for 48 hours while stirring at 100 rpm. After the reaction, the reaction mixture was cooled and the supernatant was removed by decantation to collect a precipitate. Then, the precipitate was washed with water three times, filtered, and dried at 120 ° C.

  When the XRD of the zeolite obtained as described above was measured, it was a silicoaluminophosphate (SAPO-34) having a CHA structure. Thereafter, the template was removed by baking at 550 ° C. for 6 hours in an air stream. Moreover, the zeolite was heated and dissolved in an aqueous hydrochloric acid solution, and elemental analysis was performed by ICP analysis. As a result, the constituent ratio (molar ratio) of each component with respect to the total of silicon, aluminum, and phosphorus was 9.5% for silicon, 48.7% for aluminum, and 41.8% for phosphorus.

  Subsequently, the adsorption isotherm of the SAPO-34 at 25 ° C. was measured. The adsorption isotherm is measured by using “Bellethorpe 18” (trade name) which is a volumetric method apparatus manufactured by Nippon Bell Co., Ltd., and pretreatment is performed under a vacuum condition of 5 Pa or less at a temperature of 120 ° C. for 5 hours. Then, in an air thermostat at 50 ° C., the adsorption temperature was 25 ° C., the initial introduction pressure was 3 torr, the saturated vapor pressure was 23.755 torr, and the equilibrium time was 500 seconds. As a result, a water vapor adsorption isotherm as shown in FIG. 4 was obtained. From such a water vapor adsorption isotherm, SAPO-34 has a difference between the adsorption amounts of 0.24 g / g at the relative humidity of 0.02 and 0.25, and the adsorption amounts at the relative humidity of 0.04 and 0.25. It can be seen that the difference is 0.18 g / g.

Comparative Example 1:
The adsorption isotherm was measured under the same conditions as in Example 1 for a commercially available A-type silica gel manufactured by Fuji Silysia. As a result, a water vapor adsorption isotherm as shown in FIG. 4 is obtained. From such a water vapor adsorption isotherm, the difference in adsorption amount between the relative humidity 0.02 and 0.25 is 0.12 g for A-type silica gel. / G.

Comparative Example 2:
The adsorption isotherm was measured under the same conditions as in Example 1 for commercially available activated carbon manufactured by Wako. As a result, a water vapor adsorption isotherm as shown in FIG. 4 is obtained. From such a water vapor adsorption isotherm, the activated carbon has a difference of 0.02 g / g in each adsorption amount at relative humidity of 0.02 and 0.25. It turns out that there is no.

  As described above, SAPO-34 used in the present invention has a characteristic of adsorbing and desorbing more moisture in a low humidity range with respect to A-type silica gel and activated carbon. The adsorption rotor (4) can be reduced in size, and more excellent antifogging function and humidification function can be exhibited.

It is a longitudinal cross-sectional view which shows the main components of the one aspect | mode of the vehicle air conditioner which concerns on this invention. It is a longitudinal cross-sectional view which shows the main components of the other aspect of the vehicle air conditioner which concerns on this invention. It is a perspective view which shows one aspect | mode of the structure of the adsorption | suction element which comprises an adsorption | suction rotor. It is a perspective view which shows the manufacturing method of the honeycomb structure of 1 aspect as a base material of an adsorption element. It is a water vapor | steam adsorption isotherm shown about the adsorption | suction characteristic of an adsorbent. It is a 25 degreeC water vapor adsorption isotherm which shows the actual adsorption characteristic of the adsorbent suitable for the vehicle air conditioner of this invention, and the adsorbent of a comparative example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Casing 11: Air supply path for anti-fog 12: Air supply path for heating 1a: 1st adsorption | suction area | region 1b: 2nd adsorption | suction area | region 1c: Desorption area | region 21: Inside air introduction port 22: Outside air introduction port 23: Defroster blowing port 24 : Face blowout port 25: Foot blowout port 3: Blower 4: Adsorption rotor 4A: Adsorption element 40: Honeycomb structure 45: Sheet 4c: Cell 5: Desorption heater 6: Evaporator of cooling mechanism 7: Heater core of heating mechanism

Claims (7)

  Takes inside air or inside and outside air, blows part of the air toward the inner surface of the window glass, heats part of the air by the heater core and blows it out to the passenger side, and uses an adsorption rotor to make the window glass The air conditioner for a vehicle is capable of dehumidifying the air blown to the passenger and humidifying the air blown to the occupant side, wherein the adsorption rotor is formed in a cylindrical shape in which a peripheral surface portion can be ventilated and carries an adsorbent. The adsorbing element is provided with a desorption heater in the cylinder, and the adsorbing element adsorbs moisture of air introduced into the cylinder from the outer peripheral surface portion and blows out from the inner cylinder to the window glass side through the outer peripheral surface portion. Is further configured to desorb moisture by air that is preliminarily heated by the desorption heater and blown from the inside of the cylinder to the occupant side through the outer peripheral surface portion. The adsorbent carried on the adsorbing element is an adsorbent having a difference between an adsorption amount at 25% relative humidity and an adsorption amount at 2% relative humidity on a water vapor adsorption isotherm at 25 ° C. of 0.15 g / g or more. A vehicle air conditioner characterized by having characteristics. Takes inside air or inside and outside air, blows part of the air toward the inner surface of the window glass, heats part of the air by the heater core and blows it out to the passenger side, and uses an adsorption rotor to make the window glass The air conditioner for a vehicle is capable of dehumidifying the air blown to the passenger and humidifying the air blown to the occupant side, wherein the adsorption rotor is formed in a cylindrical shape in which a peripheral surface portion can be ventilated and carries an adsorbent. The adsorbing element is provided with a desorption heater in the cylinder, and the adsorbing element adsorbs moisture of air introduced into the cylinder from the outer peripheral surface portion and blows out from the inner cylinder to the window glass side through the outer peripheral surface portion. Is further configured to desorb moisture by air that is preliminarily heated by the desorption heater and blown from the inside of the cylinder to the occupant side through the outer peripheral surface portion. Then, the suction device is provided with a difference 0.015 g / cm ³ or more adsorption properties of the adsorption amount of the adsorption amount and a relative humidity of 2% at a relative humidity of 25% at a water vapor adsorption isotherm of 25 ° C. An air conditioner for a vehicle.
(However, the adsorption amount is the adsorption amount per unit apparent volume of the adsorption element.)   The vehicle air conditioner according to claim 1 or 2, wherein the adsorbent is zeolite.   The vehicle air conditioner according to any one of claims 1 to 3, wherein the adsorbent is a crystalline aluminophosphate containing at least Al and P in the skeleton structure.   The adsorbing element is formed by supporting an adsorbent on a cylindrical honeycomb structure having a large number of air-permeable cells on the peripheral surface, and the honeycomb structure has only a substantially corrugated sheet in the circumferential direction. The vehicle air conditioner according to any one of claims 1 to 4, wherein an opening shape of each cell is formed in a substantially hexagonal shape by providing a structure laminated along.   The inside air introduction port, the outside air introduction port, the defroster outlet, the face outlet and the casing provided with the foot outlet, the inside of the casing from the inside air inlet and the outside air inlet to the defroster outlet, It is configured as a ventilation path that reaches the face outlet and the foot outlet, and the blower, heater core, and adsorption rotor are sequentially arranged from the upstream side, and the area where the adsorption rotor of the ventilation path is arranged is air from the upstream side. Is divided into three areas: a first adsorption area where air is supplied, a second adsorption area where air is discharged to the defroster outlet, and a desorption area where air is discharged to the face outlet and foot outlet. Item 6. The vehicle air conditioner according to any one of Items 1 to 5.   The inside air introduction port, the outside air introduction port, the defroster outlet, the face outlet and the casing provided with the foot outlet, the inside of the casing from the inside air inlet and the outside air inlet to the defroster outlet, It is configured as an air passage that reaches the face air outlet and the foot air outlet, and a blower, an adsorption rotor, and a heater core are sequentially arranged from the upstream side, and the air passage on the downstream side of the adsorption rotor includes the defroster air outlet Is divided into a defrosting air supply path and a heating air supply path to the face outlet and the foot outlet, and the heater core includes the antifogging supply path and the heating air supply path. The region where the adsorption rotor of the air passage is disposed is a first adsorption region where air is supplied from the upstream side, The vehicle according to any one of claims 1 to 5, wherein the vehicle is divided into three regions: a second adsorption region where air is discharged to the air supply passage, and a desorption region where air is discharged to the heating air supply passage. Air conditioner.

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