JP2012183460A - Dehumidification body and desiccant dehumidifier including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dehumidification body having high regeneration efficiency and dehumidification performance, and to provide a desiccant dehumidifier including the same.SOLUTION: A dehumidification material 24 and fine particles 44 each formed of a metal, a metal oxide, or a metal sulfide, each having a particle diameter of 1-500 μm, and having large thermal conductivity are mixed such that a mixture ratio of the fine particles to the dehumidification material becomes 10-40 wt.%, and are held by a binder 46 to form this dehumidification body, and a base material 40 of a dehumidification rotor of the desiccant dehumidifier is formed with a dehumidification body coating layer 48 by the binder.

Description

  The present invention relates to a dehumidifier that absorbs moisture contained in a gas to be dried, for example, air, and a desiccant dehumidifier equipped with the dehumidifier.

  For example, a dehumidifying material is widely used to remove moisture contained in the air. The dehumidifying material absorbs and removes moisture from the air, and when exposed to high-temperature air, it releases the adsorbed moisture and regenerates it. Using these characteristics, it is widely used from low humidity to high humidity. A humidity control function for performing dehumidification and humidification in the humidity region is obtained.

  For example, a desiccant dehumidifier is known as one that utilizes the humidity control function of such a dehumidifying material (see, for example, Patent Document 1). The desiccant dehumidifying device includes a disk-shaped dehumidifying rotor carrying a dehumidifying material, and the dehumidifying rotor is rotated by the drive source through the adsorption zone and the regeneration zone. The dehumidification rotor has a ventilation structure such as a honeycomb structure or a corrugated structure in which ventilation holes parallel to the thickness direction are provided, and a dehumidifying material is applied to the surface of the ventilation structure, that is, the surface of the ventilation holes. Is done.

  In this desiccant dehumidifying device, in the adsorption zone, moisture in the air is adsorbed by the dehumidifying material while passing through the ventilation hole of the dehumidifying rotor, and the released air is supplied to a predetermined place, thereby This place is conditioned by dehumidified air. On the other hand, in the regeneration zone, after the air is heated, it passes through the dehumidification rotor, and while the heated air passes through the ventilation holes of the dehumidification rotor, the moisture adsorbed on the dehumidification material is taken away to regenerate the dehumidification material, The air taken away is sent to the place of use. Further, the regenerated dehumidifying material moves to the adsorption zone by the rotation of the dehumidification rotor, and the dehumidification rotor rotates continuously in this way, so that moisture adsorption in the adsorption zone and moisture desorption in the regeneration zone are repeated alternately. To be carried out.

  As the dehumidifying material, chemical hygroscopic materials such as lithium chloride and physical hygroscopic materials such as activated alumina, silica gel, zeolite, and hygroscopic polymers are generally used widely. In particular, since silica gel and hygroscopic polymers have a large moisture absorption amount and can be obtained at low cost, they are often used in desiccant dehumidifiers.

JP 2003-4255 A

  The dehumidifying body containing this dehumidifying material is prepared, for example, by applying and supporting the dehumidifying material on the surface of a sheet-like base material made of pulp fiber or glass fiber. However, in the case where the dehumidifying material is applied and supported on the base material, the portion that contributes to moisture absorption and desorption is mainly the surface portion of the coating layer (layer including the dehumidifying material) in contact with the air to be dried. There is a problem that a dehumidifying material present in a portion that is not in direct contact with dry air, that is, a portion in the vicinity of the surface of the base material (in other words, a lower portion of the coating layer) hardly contributes to moisture absorption and moisture release.

  For this reason, it may be possible to prepare a dehumidifying body with an increased amount of dehumidifying material applied to the base material so as to improve the dehumidifying performance. The part that contributes to moisture release is mainly the part that is in direct contact with the air to be dried. Therefore, even if the application amount of the dehumidifying material is increased, the effect of improving the dehumidifying performance is hardly expected.

  An object of the present invention is to provide a dehumidifying body capable of enhancing the regeneration of the dehumidifying material and improving the dehumidifying performance as a result.

  Another object of the present invention is to provide a desiccant dehumidifying device capable of sufficiently dehumidifying moisture in the air.

  The dehumidifying body according to claim 1 of the present invention is a mixture of a dehumidifying material for absorbing moisture, fine particles having high thermal conductivity, and a binder for holding the dehumidifying body and the fine particles. It is characterized by.

  In the dehumidifying body according to claim 2 of the present invention, the fine particles are formed of a metal, a metal oxide, or a metal sulfide.

  Moreover, in the dehumidification body of Claim 3 of this invention, the particle diameter of the said microparticles | fine-particles is 1-500 micrometers, It is characterized by the above-mentioned.

  In the dehumidifying body according to claim 4 of the present invention, the mixing ratio of the fine particles is 10 to 40% by weight.

  Furthermore, the desiccant dehumidifier according to claim 5 of the present invention is characterized by including the dehumidifier according to any one of claims 1 to 4.

  According to the dehumidifying body of claim 1 of the present invention, since the dehumidifying body contains fine particles having a high thermal conductivity, it is regenerated by releasing moisture adsorbed by exposure to high-temperature air. At this time, the heat of the high-temperature air is efficiently transmitted to the entire dehumidifying body, and the dehumidifying material is efficiently regenerated. As a result, the moisture absorption / desorption performance of the dehumidifying body can be improved.

  Further, according to the dehumidifying body according to claim 2 of the present invention, since the fine particles having high thermal conductivity are formed of metal, metal oxide or metal sulfide, they can be easily mixed into the dehumidifying body. At the same time, the heat of the high-temperature air can be efficiently transmitted to the entire dehumidifying body during the regeneration, and the dehumidifying material can be efficiently regenerated.

  Moreover, according to the dehumidifying body of claim 3 of the present invention, since the particle diameter of the fine particles (for example, metal or metal oxide) having a high thermal conductivity is 1 to 500 μm, the dehumidifying material is applied to the base material. At the time of carrying, the dehumidifying material is carried in a three-dimensional state, and the surface area can be increased. Therefore, the gas to be dried (for example, air) is applied and supported so that it can be easily touched by the dehumidifying material. As a result, the dehumidifying capacity per unit volume of the entire dehumidifying body is improved, and the moisture contained in the dried gas is more It can be effectively dehumidified.

  Further, according to the dehumidifier of claim 4 of the present invention, since the mixing ratio of the fine particles is 10 to 40% by weight, the fine particles are dispersed three-dimensionally and the dehumidifying material is applied and supported three-dimensionally. Accordingly, the dehumidifying capacity per unit volume of the entire dehumidifying body can be further improved.

  Furthermore, since the desiccant dehumidifying apparatus according to claim 5 of the present invention includes the dehumidifying body according to any of claims 1 to 4, the dehumidifying capacity of the dehumidifying apparatus is increased to increase the moisture in the air. Can be dehumidified.

BRIEF DESCRIPTION OF THE DRAWINGS The simplified figure which shows one Embodiment of the desiccant dehumidification apparatus according to this invention. The perspective view which shows the dehumidification rotor of the desiccant dehumidification apparatus of FIG. The partial expanded sectional view which expands and shows a part of dehumidification rotor of FIG. The perspective view which shows simply the wind tunnel apparatus used for the dehumidification performance experiment.

  Hereinafter, with reference to an accompanying drawing, an embodiment of a dehumidifying body according to the present invention and a desiccant dehumidifying device provided with the same will be described.

  In FIG. 1, the desiccant dehumidifying device shown in the figure includes a device housing 2, the inside of the device housing 2 is partitioned by a partition member 3, and a suction flow path 4 is defined on one side (lower side in FIG. 1) of the partition member 3. A discharge channel 6 is defined on the other side (upper side in FIG. 1). A first introduction duct 8 is disposed on the introduction side of the suction flow path 4, and a first extraction duct 10 is disposed on the outlet side thereof. Further, a second introduction duct 12 is disposed on the introduction side of the discharge flow path 6, and a second lead duct 14 is disposed on the discharge side thereof. Such a desiccant dehumidifier is installed in a building or the like, and the left side in FIG. 1 is the outdoor 16 of the building, and the right side in FIG. 1 is the inside of the building (for example, the indoor space 18).

  In the apparatus housing 2, a dehumidification rotor 20 is disposed across the suction flow path 4 and the discharge flow path 6, and the dehumidification rotor 20 constitutes a dehumidifier for dehumidifying moisture. The dehumidification rotor 20 has a disk shape, and one side thereof is located on the suction flow path 4 side, and the other side is located on the discharge flow path 6. The suction channel 4 is provided with an adsorption zone K, the discharge channel 6 is provided with a regeneration zone S, and the dehumidification rotor 20 is rotated through the adsorption zone K and the regeneration zone S. A motor (not shown) for rotating in a predetermined direction is drivingly connected to the dehumidifying rotor 20 and rotated in a predetermined direction by this motor.

  Referring to FIG. 2, the dehumidification rotor 20 will be described in detail later. The dehumidification rotor 20 is configured in a ventilation structure having a honeycomb-like structure, and a large number of ventilation holes 22 are formed in the thickness direction (that is, the left-right direction in FIG. It extends in parallel with the lower left to the upper right), and air (that is, a gas to be dried) flows through the numerous ventilation holes 22. A dehumidifying material 24 (see FIG. 3) is carried on the surface of the honeycomb-shaped structure of the dehumidifying rotor 20, that is, the surface defining a large number of ventilation holes 22 as described later. The ventilation structure of the dehumidifying rotor 20 may be another ventilation structure such as a corrugated structure.

  Returning to FIG. 1 again, in this desiccant dehumidifier, a suction fan 26 is provided in the suction flow path 4, and this suction fan 26 is located downstream of the dehumidification rotor 20 (in other words, downstream of the adsorption zone K). It is arranged. The exhaust passage 6 is provided with a heating means 28 and an exhaust fan 30. The heating means 28 is disposed upstream of the dehumidification rotor 20 (in other words, upstream of the regeneration zone S), and the exhaust fan 30 is dehumidified. It is disposed downstream of the rotor 20 (in other words, downstream of the reproduction zone S). The heating means 28 includes, for example, a heat exchanger that exchanges heat with warm water, a heater that heats with electricity, and the like.

  An outline of the operation of this desiccant dehumidifier is as follows. During the dehumidifying operation, a motor (not shown) is operated to rotate the dehumidifying rotor 20 in a predetermined direction. In addition, the intake fan 26 is operated to suck in outside air, and the exhaust fan 30 is operated to exhaust indoor air.

  Air (gas to be dried) from the outside (outdoor of the building) is sucked into the suction flow path 4 through the first introduction duct 8 as indicated by an arrow 32, and the sucked air flows through the adsorption zone K. In the adsorption zone K, this air flows through the numerous ventilation holes 22 of the dehumidification rotor 20, and while flowing through these ventilation holes 22, the moisture contained in the air is adsorbed by the dehumidification material 24 carried by the dehumidification rotor 20. The dehumidified air is sent from the first outlet duct 10 to the space to be dehumidified (indoor space 18 of the building) as indicated by an arrow 34, and the humidity of the space is adjusted by the dehumidified air.

  On the other hand, the air from the indoor space is sucked into the discharge channel 6 through the second introduction duct 12 as indicated by an arrow 36, and the sucked air flows through the regeneration zone S after being heated by the heating means 28. . In the regeneration zone S, this air flows through a number of ventilation holes 22 of the dehumidification rotor 20, and while it flows through these ventilation holes 22, it takes away the moisture adsorbed by the dehumidifying material 24 of the dehumidification rotor 20 and removes the removed moisture. As shown by the arrow 38, the air to be contained is discharged to the outside (outside of the building) from the second lead-out duct 14, and the dehumidifying material 24 is regenerated by removing moisture in this way.

  The dehumidification rotor 20 is rotated through the moisture absorption area K and the regeneration area S, and moisture in the air is adsorbed by the dehumidifying material 24 in the moisture absorption area K, and the moisture adsorbed in the regeneration area S is detached from the dehumidification material 24. The adsorption and regeneration of the dehumidifying material 24 are repeated.

  Next, a specific configuration of the dehumidifying rotor 20 will be described with reference to FIG. The dehumidifying rotor 20 that functions as a dehumidifying body includes a base material 40 for supporting the dehumidifying material 24, a honeycomb-like structure is formed by the base material 40, and the dehumidifying material 24 is placed on the surface of the base material 40 of the honeycomb-like structure. A mixture 42 is applied. In this embodiment, the mixture 42 includes a dehumidifying material 24, fine particles 44 for supporting the dehumidifying material 24 three-dimensionally, and a binder 46 for holding them.

  For the base material 40, for example, a sheet-like member formed from pulp fiber, glass fiber, or the like is used, and the mixture 42 is applied to both surfaces of the sheet-like member to provide the coating layer 48.

  The dehumidifying material 24 contained in the mixture 42 has a particle size of about 0.1 to 20 μm, and as this dehumidifying material, zeolite, silica gel, polyacrylic polymer, or the like is used. The zeolite can be arbitrarily selected from synthetic zeolites such as A-type, Y-type, and X-type, or natural zeolites such as mordenite, shabasite, borofluorite, erionite, and ferrierite. Also effective are those obtained by substituting cations in zeolite with alkaline earths such as magnesium, iron and copper, transition metals, or rare earth elements such as lanthanum, cerium and praseodymium. The silica gel can be arbitrarily selected from A and B types. In addition, the polyacrylic polymer can be arbitrarily selected from polyacrylic acid, sodium polyacrylate, potassium polyacrylate, and the like.

  In addition, as the fine particles having high thermal conductivity, metals such as aluminum, copper, iron, zinc, gold, silver, or a mixture thereof can be used. Besides such metals, oxides or sulfides of these metals can be used. Things can also be used. The fine particles may have a suitable shape such as a spherical shape, a needle shape, or a fiber shape.

  The fine particles 44 mixed in the dehumidifying material 24 are desirably those having a particle size of 1 to 500 μm and larger than the dehumidifying material 24, and more preferably those having a particle size of 100 to 500 μm. When the particle diameter of the fine particles 44 becomes smaller, the coating layer 48 applied to the base material 40 becomes planar, and when the particle diameter becomes smaller than 1 μm, the effect of mixing the fine particles 44 (the coating layer 48 is three-dimensionally increased in surface area). (Effect) is hardly obtained, and when the particle diameter is increased, the binding by the binder 46 is weakened. When the particle diameter exceeds 500 μm, the fine particles 44 are easily dropped from the surface of the base material 40 and peeled off.

  The mixing ratio of the fine particles 44 is preferably 10 to 40% by weight when the entire mixture 42 is 100% by weight, and if less than 10% by weight, the mixing amount of the fine particles 44 is reduced and the coating layer 48 is mixed. It is difficult to greatly increase the surface area in a three-dimensional state, and when it exceeds 40% by weight, the mixing ratio of the dehumidifying material 24 is relatively reduced, and the dehumidifying ability (that is, moisture adsorption ability) of the coating layer 48 is reduced. descend.

  Further, as the binder, colloidal silica, water glass, colloidal alumina, epoxy polymer, ether polymer, urethane polymer, or the like can be arbitrarily selected and used.

  The mixing ratio of the binder 46 is preferably 5 to 20% by weight when the entire mixture 42 is 100% by weight, and if it is less than 5% by weight, the amount of the binder 46 mixed in is reduced and the bonding strength is reduced. The dehumidifying material 24 and / or fine particles 44 easily fall off and peel off from the coating layer 48 applied to the base material 40, and when the amount exceeds 20% by weight, the amount of the binder 46 mixed in increases. The binder 46 covers the dehumidifying material 24, and the dehumidifying ability of the coating layer 48 is reduced.

  When such a dehumidifying rotor 20 is used, since the coating layer 48 applied to the surface of the base material 40 contains fine particles having a high thermal conductivity (for example, metal, metal oxide, metal sulfide), When the dehumidifying material 24 is regenerated, the heat of the high-temperature air is efficiently transmitted to the entire dehumidifying body, whereby the dehumidifying material can be efficiently regenerated, and as a result, the moisture absorbing / releasing performance of the dehumidifying body is improved. be able to. Further, since the particle diameter of the fine particles 44 is 1 to 500 μm, the surface can be three-dimensionally increased to increase the surface area thereof, whereby the air flowing through the ventilation holes 22 of the dehumidification rotor 20 and the coating layer The contact with the dehumidification material 24 in 48 increases, As a result, the dehumidification performance of the dehumidification rotor 20 can be improved more.

  As mentioned above, although one embodiment of the dehumidifying body according to the present invention and the desiccant dehumidifying device provided with the dehumidifying body has been described, the present invention is not limited to such an embodiment, and various modifications can be made without departing from the scope of the present invention. Or it can be modified.

  For example, in the above-described embodiment, the description has been made by applying the present invention to the dehumidifying rotor 20 as a dehumidifying body. However, the present invention is not limited to this, and the base material 40 itself is omitted and the dehumidifying body is configured from the mixture 42. In such a case, the dehumidifying body itself may be formed into particles having a diameter of, for example, about several millimeters, or may be formed into a honeycomb-shaped formed body, a fibrous formed body, or the like. May be.

  Next, in order to confirm the dehumidifying effect of the dehumidifying body according to the present invention, the following experiment was performed. As the dehumidifying body, a dehumidifying rotor 70 having a honeycomb structure as shown in FIG. 2 was prepared. The dehumidifying rotor 70 had a diameter of 250 mm and a thickness of 80 mm. The dehumidifying rotor 70 was set in the wind tunnel device 72 shown in FIG. 4 and the dehumidifying capacity of the dehumidifying rotor 70 was examined. The wind tunnel housing 74 of the wind tunnel device 72 has a rectangular shape, and a rectangular air flow path 76 is defined therein, and the dehumidifying rotor 70 is set in the air flow path 76. As for the inner size of the wind tunnel housing 74 (in other words, the size of the air flow path 76), the vertical size H was 30 cm, the horizontal size W was 30 cm, and the length L was 200 cm. An air generator (not shown) capable of adjusting temperature, humidity and flow rate is connected to the inside of the wind tunnel housing 74 (that is, the air flow path 76), and the air whose temperature, humidity and flow rate are adjusted is indicated by an arrow. As indicated by 78, the air was introduced from the inflow side of the wind tunnel housing 74, flowed through the air flow path 76, and led out from the outflow side as indicated by an arrow 80. Further, in order to measure the humidity and temperature before and after the passage of the air passing through the dehumidifying rotor 70, a first humidity thermometer 82 (a humidity thermometer manufactured by Vaisala, model number: HPM230) is disposed upstream of the dehumidifying rotor 70. ) And a second humidity thermometer 84 (same as the first humidity thermometer 82) was installed downstream of the dehumidifying rotor 70.

  As Examples 1 and 2, a mixture having the mixing ratio of each raw material (dehumidifying material, fine particles and binder) as shown in Table 1 was prepared and applied to a base material to produce a dehumidifying rotor 70. The dehumidifying ability (that is, the dehumidifying amount) of the mixture (in other words, the dehumidifying bodies of Examples 1 and 2) was measured. In Examples 1 and 2, a polyacrylic polymer was used as a dehumidifying material, and aluminum was used as fine particles having high thermal conductivity. The average particle diameter of the fine particles was 200 μm. An epoxy polymer was used as the binder. The total weight of the dehumidifying material and fine particles applied to the dehumidifying rotor 70 was 150 g.

除湿能力の計測においては、風洞ハウジング７４内に実施例１及び２の除湿ロータ７０をセットし、計測の前段階として、７０℃、５％ＲＨの乾燥空気を風洞ハウジング７４を通して１５分間流して除湿ロータ７０（即ち、それに塗布された除湿体）を乾燥させ、その後、除湿実験を行った。この除湿実験においては、３０℃、７０％ＲＨの加湿空気を風洞ハウジング７４を通して流し、除湿ロータ７０を通過する前の空気の湿度を第１湿度温度計８２でモニターするとともに、除湿ロータ７０を通過した後の空気の湿度を第２湿度温度計８４によりの湿度をモニターした。尚、風洞ハウジング７４を通して送給した空気の流量は、１５０ｍ^３／ｈであった。

In the measurement of the dehumidifying capacity, the dehumidifying rotor 70 of Examples 1 and 2 is set in the wind tunnel housing 74, and dehumidification is performed by flowing dry air of 70 ° C. and 5% RH through the wind tunnel housing 74 for 15 minutes as a preliminary stage of measurement. The rotor 70 (that is, the dehumidifying body applied thereto) was dried, and then a dehumidifying experiment was performed. In this dehumidification experiment, humidified air of 30 ° C. and 70% RH is caused to flow through the wind tunnel housing 74, and the humidity of the air before passing through the dehumidifying rotor 70 is monitored by the first humidity thermometer 82 and passes through the dehumidifying rotor 70. Thereafter, the humidity of the air was monitored by the second humidity thermometer 84. The flow rate of air fed through the wind tunnel housing 74 was 150 m ³ / h.

  The results of this dehumidification experiment were as shown in Table 1. In this dehumidification experiment, the air supplied to the wind tunnel housing 74 is switched over from the dry air to the humidified air for 50 seconds from 10 seconds to 60 seconds, before passing through the dehumidification rotor 70. The humidity and temperature were measured every second by the first humidity thermometer 82, and the humidity and temperature after passing through the dehumidification rotor 70 were measured every second by the second humidity thermometer 84. Then, the humidity and temperature measured by the first and second humidity thermometers 82 and 84 are averaged, and the difference between the average humidity (absolute humidity) is defined as the amount of moisture adsorbed by the dehumidification rotor 70 (ie, dehumidification amount). The amount of dehumidification in each of Examples 1 and 2 is shown in the right column of Table 1.

  Further, as Comparative Examples 1 and 2, a mixture in which the mixing ratio of each raw material (dehumidifying material and binder) is as shown in Table 1 was prepared and applied to the base material in the same manner as in Examples 1 and 2, and the dehumidifying rotor 70 was manufactured, and the dehumidifying ability (that is, the dehumidifying amount) of the mixture in each dehumidifying rotor 70 was measured. Further, as Comparative Examples 3 and 4, the same raw materials (dehumidifying material and binder) as in Examples 1 and 2 were used, and melamine resin having an average particle diameter of 200 μm was used as fine particles, and the mixing ratio thereof was as shown in Table 1. A mixture was prepared, applied to the base material in the same manner as in Examples 1 and 2, and a dehumidification rotor 70 was manufactured. The dehumidification capacity (ie, dehumidification amount) of the mixture in each dehumidification rotor 70 was measured. Also in Comparative Examples 1 to 4, the total weight of the dehumidifying material and fine particles applied to the dehumidifying rotor 70 was set to 150 g as in Examples 1 and 2.

  In the measurement of the dehumidifying capacity, in the same manner as in Examples 1 and 2, as a pre-stage of the measurement, dry air of 70 ° C. and 5% RH was passed through the wind tunnel housing 74 for 15 minutes, and then humidified at 30 ° C. and 70% RH. The air flows through the wind tunnel housing 74 and the humidity of the air before passing through the dehumidifying rotor 70 is monitored by the first humidity thermometer 82, and the humidity of the air after passing through the dehumidifying rotor 70 is monitored by the second humidity thermometer 84. The temperature and humidity were monitored and measured every second for 50 seconds after switching from dry air to humidified air until 10 seconds passed and 60 seconds passed. In the same manner as in the first and second embodiments, the humidity and temperature measured by the first and second humidity thermometers 82 and 84 are averaged, and the moisture desorbed by the dehumidification rotor 70 is determined based on the difference between the average humidity (absolute humidity). The amount of dehumidification (namely, the amount of dehumidification) is shown in the right column of Table 1 for each of Comparative Examples 1 to 4.

  As is apparent from Table 1 showing the dehumidification experiment results, Example 1 containing fine particles having high thermal conductivity (in Example 1 and 2, aluminum fine particles) even when the mixing ratio of the dehumidifying material is the same. And 2 are more dehumidified than Comparative Examples 1 and 2 that do not contain fine particles, and are also dehumidified compared to Comparative Examples 3 and 4 that contain organic substances as fine particles (in Comparative Examples 3 and 4, melamine resin). The amount was large. This indicates that the dehumidifying ability is improved by mixing fine particles having a high thermal conductivity.

  Next, as Examples 3 to 6, the same raw materials (dehumidifying material, fine particles and binder) as in Examples 1 and 2 were used, and a mixture having these mixing ratios as shown in Table 2 was prepared. The dehumidification rotor 70 was manufactured by applying to the base material in the same manner as in FIG.

そして、実施例１〜６及び比較例１について、図４に示す風洞装置を用い、３０℃、９５％ＲＨの空気を１５分間流して除湿ロータ７０を吸湿処理させた後に、７０℃、５％ＲＨの空気を１分間流して、除湿ロータ７０の下流側面の温度を測定した。

And about Examples 1-6 and the comparative example 1, after using the wind tunnel apparatus shown in FIG. 4 and flowing air of 30 degreeC and 95% RH for 15 minutes and carrying out the moisture absorption process of 70 degreeC, 70 degreeC and 5% The temperature of the downstream side surface of the dehumidification rotor 70 was measured by flowing RH air for 1 minute.

  The measurement results in Examples 1 to 6 and Comparative Example 1 were as shown in the right column of Table 2. As is clear from Table 2, the temperature of the dehumidifying rotor 70 in Examples 1 to 6 containing fine particles having high thermal conductivity (aluminum in Examples 1 to 6) is higher than the temperature of Comparative Example 1 not containing these fine particles. Moreover, when the temperature of Examples 1-6 was seen, it turned out that the temperature of the dehumidification rotor 70 is so high that this fine particle is included more. This is considered to be because the heat of the dry air is efficiently conducted to the entire dehumidifying rotor 70 and the temperature rises as the mixing ratio of the fine particles having high thermal conductivity increases, thereby mixing fine particles having high thermal conductivity. Thus, it was confirmed that the dehumidification rotor 70 can be efficiently regenerated.

  Next, in order to examine the ratio of the fine particles mixed in the dehumidified body, the dehumidifying ability was measured in the same manner as in Examples 1 and 2 for Examples 3 to 6. In the measurement of the dehumidifying capacity, as described above, as a preliminary step of measurement, dry air of 70 ° C. and 5% RH is allowed to flow through the wind tunnel housing 74 for 15 minutes, and then humidified air of 30 ° C. and 70% RH is supplied to the wind tunnel. The humidity of the air flowing through the housing 74 and before passing through the dehumidifying rotor 70 is monitored by the first humidity thermometer 82, and the humidity of the air after passing through the dehumidifying rotor 70 is monitored by the temperature and humidity of the second humidity thermometer 84. The dehumidification amount was determined based on the measured humidity and measured temperature of the first and second humidity thermometers 82 and 84.

  The results of this dehumidification test were as shown in Table 3. In order to facilitate understanding, the experimental results of Examples 1 and 2 are shown in Table 3. As is apparent from Table 3, if the mixing ratio of the fine particles is less than 10% by weight, the effect of mixing the fine particles (improvement in hygroscopicity) is not obtained so much, and the mixing ratio of the fine particles is 40%. If it exceeds, the mixing ratio of the dehumidifying material is relatively decreased and the dehumidifying performance is lowered. From this, it was found that the mixing ratio of the fine particles is preferably 10 to 40% by weight.

2 Device Housing 4 Suction Channel 6 Discharge Channel 20 Dehumidifying Rotor 24 Dehumidifying Material 40 Base Material 42 Mixture 44 Fine Particle 46 Binder 48 Coating Layer

Claims (5)

  A dehumidifying body comprising a dehumidifying material for absorbing moisture, fine particles having high thermal conductivity, and the dehumidifying material and a binder for holding the fine particles.   The dehumidifier according to claim 1, wherein the fine particles are formed of a metal, a metal oxide, or a metal sulfide.   The dehumidifier according to claim 1 or 2, wherein the fine particles have a particle diameter of 1 to 500 µm.   The dehumidifier according to any one of claims 1 to 3, wherein a mixing ratio of the fine particles is 10 to 40% by weight. A desiccant dehumidifier comprising the dehumidifier according to any one of claims 1 to 4.

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