JP4955645B2 - Dehumidifier - Google Patents

Description

  The present invention relates to a dehumidifying device that significantly improves deterioration of dehumidifying efficiency due to air leakage at an outer peripheral seal portion of a dehumidifying rotor.

  Conventionally, in order to produce low dew point air, the dehumidification rotor has one stage along the flow path (for example, when producing treated air having a dew point temperature of −50 ° C. or lower) or two stages (for example, a dew point temperature of −90 ° C. or lower). A dehumidifying device is known which is provided in the case of manufacturing the processing air. The dehumidification rotor used for the production of such low dew point air has a greater thickness in the flow path direction than that used for general air conditioning in order to greatly reduce the amount of moisture in the air that has passed through the treatment area. is doing. For this reason, in the dehumidifying device that produces low dew point air, the pressure loss when passing through the dehumidifying rotor becomes large, so it is necessary to set the static pressure capacities of the air supply fan and the exhaust fan through which air is circulated. For this reason, the pressure difference between the inside of the flow path and the outside thereof is larger than that of a dehumidifying device for general air conditioning.

  On the other hand, in the dehumidification rotor, air leakage can occur inside and outside due to the pressure difference between the inside and the outside of the flow path as described above, at the outer peripheral seal portion at the outer peripheral portion of both end faces. That is, when the inner pressure is higher than the outer side, air leaks from the inner side to the outer side. Conversely, when the inner pressure is lower than the outer side, the air leaks from the outer side to the inner side. In particular, in the case of a dehumidifying device that produces low dew point air, in a section where the pressure in the flow path is negative due to suction by a fan, leakage that causes high outside dew point air to be mixed into the inside low dew point air is prevented. This is important from the viewpoint of improving the dehumidification efficiency.

  The amount of leaked air in such a seal portion is extremely small compared to the amount of air passing through the dehumidifying rotor, but in the case of a dehumidifying device that produces low dew point air, the amount of leaked air is larger than that of a general air conditioning dehumidifying device. Has a greater effect on dew point temperature. That is, in the case of a dehumidifying device that produces low dew point air, as described above, the differential pressure inside and outside the flow path increases, so the amount of leaked air increases in proportion to this differential pressure, and the processing air has a low dew point. Therefore, even if a small amount of high dew point air is mixed, the influence on the increase of the dew point tends to increase. Therefore, in a dehumidifying device that produces low dew point air, it is necessary to suppress the influence on the dehumidification efficiency as much as possible against leakage of external air mixed into the flow channel, particularly in a portion where the pressure in the flow channel becomes negative. .

By the way, the following is disclosed as a technique for producing low dew point air with a two-stage dehumidifying rotor. For example, Patent Document 1 below discloses an operation method for performing a warm-up operation in which the dry air traveling toward the outlet side of the supply path is returned to the inlet side of the supply path and the operation state is maintained when dry air is not required in the target space. Has been. Further, Patent Document 2 below discloses a dehumidifying device provided with a return air passage that returns a part of the air exhausted from the first rotor to a dehumidification passage upstream of the first rotor.
Japanese Patent No. 3896344 JP 2002-320817 A JP-A-11-169644

  However, in the dehumidifying devices described in Patent Documents 1 and 2, the air that has passed through the treatment area of the dehumidification rotor is returned to the previous stage of the dehumidification rotor without resolving the air leakage as described above, thereby reducing the processing air. Since dew point has been achieved, the operating efficiency of the dehumidifier has been a factor.

  On the other hand, adsorbents such as silica gel, zeolite, and alumina oxide built in the dehumidification rotor increase the desorption efficiency when the adsorbed water is desorbed (regenerated) and the adsorbent periphery is at a negative pressure relative to the atmospheric pressure. It is known that this is a property (see paragraph [0025] of Patent Document 3). Here, in order to prevent air leakage from the outside, a measure to make the entire device positive pressure can be considered, but this also makes the adsorbent surroundings positive pressure, and improvement of desorption efficiency by negative pressure as described above Cannot be obtained. In particular, in a dehumidifying device that produces low dew point air, there is a great influence that desorption efficiency cannot be increased due to negative pressure, and the dehumidifying efficiency of the dehumidifying device may be reduced.

  Furthermore, as a peripheral seal of the dehumidifying rotor, a packing material or a sealing material generally made of resin or rubber is used, but intrusion of moisture due to moisture permeation from such a sealing material is one factor that reduces the dehumidifying efficiency. Become. The intrusion of moisture by moisture permeation is determined by the moisture concentration difference (relative pressure difference) and the moisture permeability coefficient specific to the material of the constituent member. For example, in the production process of low dew point air having a dew point temperature of −90 ° C. or lower, this water content cannot be ignored. For this reason, in a dehumidifying apparatus for producing low dew point air, it is also important to eliminate as much as possible the penetration of moisture due to moisture permeation. As one of the countermeasures, it is conceivable to weld all the joint portions of the constituent members. However, in addition to increasing the manufacturing cost of the apparatus, work such as cutting or re-welding of the welded part is required during maintenance. It becomes necessary and workability becomes worse.

  Therefore, the main problem of the present invention is to increase the desorption efficiency of the adsorbent by setting the regeneration region of the dehumidification rotor to a negative pressure state, while preventing the decrease of the dehumidification efficiency due to intrusion of external air and having a simple structure and good workability. It is to provide a dehumidifying device.

In order to solve the above-mentioned problem, as the present invention according to claim 1, a processing region in which a built-in adsorbent has a function of adsorbing moisture across an air supply path for supplying outside air and an exhaust path for exhausting air. A dehumidification rotor defined in each region including a regeneration region having a function of desorbing moisture by the adsorbent is provided, an air supply fan is provided in the air supply passage, and an exhaust is provided in the exhaust passage. A dehumidifying device provided with a fan,
The dehumidification rotor is disposed on the suction side of the exhaust fan, and a closed space portion that integrally surrounds the range including the dehumidification rotor and the flow paths before and after the dehumidification rotor is formed, and passes through the processing region of the dehumidification rotor. By providing a low dew point air passage for allowing a part of the low dew point air to circulate in the closed space part, a dehumidifying device is provided which fills the closed space part with low dew point air.

  In the first aspect of the present invention, when the suction side of the exhaust fan becomes negative pressure, the dehumidification rotor and the flow passage disposed upstream of the exhaust fan become negative pressure, and dehumidification efficiency is reduced. The problem is solved. That is, when the inside of the flow path on the upstream side of the exhaust fan becomes negative pressure, external air flows into the flow path from a gap portion generated in the outer peripheral seal portion or the duct connection portion of the dehumidification rotor. Since this external air has a high dew point temperature, moisture desorption (regeneration) from the adsorbent is not performed efficiently in the regeneration region, or this external air enters the air supply path via a dehumidification rotor or the like. Thus, problems such as a decrease in dehumidification efficiency and an increase in the dew point temperature of the supply air have occurred.

  Therefore, in the present invention, the dehumidification rotor disposed on the suction side of the exhaust fan and the closed space portion surrounding the range including the flow path before and after the dehumidification rotor are formed, and the low dew point air that has passed through the processing region of the dehumidification rotor is formed. A low dew point air passage is provided through which a part is circulated in the closed space. Thereby, since the inside of the closed space is filled with low dew point air, the air that enters the flow path from the gap portion as described above becomes the low dew point air filled in the closed space. Therefore, as the leaked air, low dew point air that has passed through the treatment area of the dehumidifying rotor enters instead of the conventional air having a high dew point temperature. Problems such as an increase in the temperature of the dew point can be solved.

  Furthermore, in the regeneration region located on the suction side of the exhaust fan, the negative pressure due to the suction pressure of the exhaust fan is maintained, so that the property of increasing the desorption efficiency due to the negative pressure of the adsorbent is not impaired. Therefore, in the present invention, while the regeneration region is set to a negative pressure to increase the desorption efficiency of the adsorbent, it is possible to simultaneously solve the conflicting problems of preventing a decrease in the dehumidification efficiency due to leak air.

  As described above, in the present invention, even if a gap portion occurs in the connection portion of the flow path or the like, problems such as a decrease in dehumidification efficiency do not occur. Since a general-purpose structure that does not require such a strong structure can be obtained, workability such as maintenance is improved.

  As a second aspect of the present invention, the dehumidification rotor is provided in two stages along the flow path, and at least one of the dehumidification rotors is located on the suction side of the exhaust fan. Is provided.

  The invention described in claim 2 is a configuration in the case where the dew point temperature of the supply air manufactured by the present dehumidifying device is set to −90 ° C. or less, and two stages of dehumidifying rotors are provided along the flow path. The stage dehumidification rotor is located on the suction side of the exhaust fan.

  As a third aspect of the present invention, there is provided the dehumidifying device according to any one of the first and second aspects, wherein the pressure in the closed space is set higher than the atmospheric pressure outside the closed space.

  According to the third aspect of the present invention, the pressure inside the closed space is set higher than the atmospheric pressure outside the closed space, thereby preventing high dew point air outside the closed space from entering the closed space. it can.

  As a fourth aspect of the present invention, in the closed space portion, the second closed space portion surrounding the dehumidifying rotor is formed and the processing region of the dehumidification rotor disposed in the second closed space portion is passed. The inside of the said 2nd closed space part was filled with the low dew point air by providing the 2nd low dew point air path which distribute | circulates a part of low dew point air in the said 2nd closed space part. A dehumidifying device is provided.

  According to the fourth aspect of the present invention, by forming the second closed space portion that surrounds the dehumidification rotor disposed in the closed space portion, it is possible to further prevent the dehumidification efficiency from being lowered and to prevent the dew point temperature from rising. Etc. are planned. Specifically, the second closed space portion surrounds the dehumidification rotor in a narrower range than the closed space portion in order to prevent the influence of leak air particularly around the dehumidification rotor. And the 2nd low dew point air path which distribute | circulates a part of low dew point air which passed the process area | region of the dehumidification rotor arrange | positioned in the said 2nd closed space part in the said 2nd closed space part is provided. Therefore, the air in the narrow second closed space surrounding the dehumidification rotor can be quickly replaced with low dew point air at the start of operation, and problems such as a decrease in the dehumidification efficiency of the adsorbent and an increase in the dew point temperature of the supply air are started. Immediately after that, it will be possible to solve it quickly.

  As a fifth aspect of the present invention, the low dew point air passage is provided with a flow adjustment damper for adjusting a flow rate of the low dew point air passage, and the flow adjustment damper is provided in the closed space portion. The dehumidification apparatus in any one of -4 is provided.

  According to a sixth aspect of the present invention, the low dew point air passage is provided with a flow rate adjusting damper for adjusting a flow rate of the low dew point air passage, and the flow rate adjusting damper is provided outside the closed space portion. The dehumidification apparatus in any one of 1-4 is provided.

  According to the fifth and sixth aspects of the present invention, when the flow rate adjusting damper provided in the low dew point air passage is located in the closed space portion and outside the closed space portion, respectively. In the former case, the structure of the apparatus can be simplified, and in the latter case, flow rate adjustment can be facilitated.

  As described above in detail, according to the present invention, the regeneration region of the dehumidification rotor is set to a negative pressure state to improve the desorption efficiency of the adsorbent, while preventing the dehumidification efficiency from being lowered due to intrusion of external air, and the workability with a simple structure. A good dehumidifier can be provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First embodiment]
(Configuration of dehumidifier 1A)
The configuration of the dehumidifying device 1A according to the first embodiment of the present invention will be described in detail based on FIG. FIG. 1 is a system configuration diagram of the dehumidifying apparatus 1A.

  In the dehumidifying apparatus 1A according to the first embodiment, an air supply path S for supplying outside air OA, an exhaust path E for exhausting air, and a purge air supply path P for supplying low-temperature air to the dehumidification rotor 2 are formed. The adsorbent (desiccant) is built in across the air supply path S, the exhaust path E, and the purge air supply path P, and the adsorbent adsorbs moisture (dehumidifies) the circulating air, and the adsorbent A rotary dehumidification rotor 2 defined in a regeneration region 22 that performs moisture desorption (regeneration) to the circulating air and a purge region 23 that cools the adsorbent is arranged in one stage. In addition, an air supply fan 3 is disposed in the upstream of the dehumidification rotor 2 in the air supply path S, and an exhaust fan 4 is disposed in the downstream of the dehumidification rotor 2 in the exhaust path E. That is, the dehumidifying rotor 2 is disposed on the suction side of the exhaust fan 4.

  Particularly in the present invention, the dehumidifying device 1A is provided with a dehumidifying rotor 2 on the suction side of the exhaust fan 4, and a closed space that integrally surrounds a range including the dehumidifying rotor 2 and flow paths before and after the dehumidifying rotor 2. Part 10 is formed. Then, by providing a low dew point air passage L through which a part of the low dew point air that has passed through the treatment region 21 of the dehumidifying rotor 2 flows into the closed space part 10, the inside of the closed space part 10 is filled with the low dew point air. ing.

  Specifically, the closed space portion 10 is a closed space surrounded by a plate-like outer plate, and the supply passage S, the exhaust passage E, and the purge supply passage P are provided on the outer plate. The penetrating duct penetrating parts 11 to 13 are formed respectively.

  The duct penetrating parts 11 to 13 can be filled with a sealing material or the like so as not to generate a gap between the ducts of the respective flow paths and the outer plate of the closed space part 10 to prevent air leakage. . Here, by setting the pressure in the closed space portion 10 to be higher than the atmospheric pressure outside the closed space portion 10, the high dew point air outside the closed space portion 10 is closed without applying the seal or the like. 10 is preferable because it can be prevented from entering the inside. However, even in this case, there is a possibility that the operating efficiency of the dehumidifying device may be slightly reduced due to leakage of air in the closed space 10, so that the gap is made minute by adjusting the processing accuracy of the duct penetrating portion. To do. Even when the gap is filled with a sealing material or the like, it is preferable to reduce the amount of the sealing material or the like by making the gap as small as possible.

  Moreover, it is preferable to use the metal plate which does not have moisture permeability in material itself as an outer plate which forms the said closed space part 10. FIG. On the other hand, in consideration of adjustment and maintenance of each device installed in the closed space portion 10, it is desirable that a part of the outer plate forming the closed space portion 10 has a structure that can be easily attached and detached. Further, it is desirable to use a sealing material or a packing material at the joint portion between the outer plates to ensure airtightness.

  The air supply path S is a flow path in which the introduced outside air OA is treated with the adsorbent or the like and supplied into the room as an air supply SA. The exhaust path E is a flow path that takes in part of the air treated by the adsorbent in the air supply path S, regenerates the adsorbent with this air, and then discharges it as exhaust EA. The purge air supply path P is a flow path for supplying a part of the low-temperature air cooled by the cooling device 5 provided in the air supply path S to the purge region 23 and then feeding it to the front stage of the heating device 6 in the exhaust path E. is there.

  As shown in FIG. 2, the dehumidifying rotor 2 is provided with ventilation structures such as a mesh shape, a honeycomb shape, and a slit shape on both side surfaces of a casing formed in a rotating drum shape. Adsorbing materials such as silica gel, zeolite, and alumina oxide, which are known in the art and have excellent adsorption / desorption performance, are incorporated. Air in each of the flow paths S and E can pass through the inside of the dehumidifying rotor 2 through the ventilation structure of the casing, and humidity adjustment is performed by the action of moisture adsorption / desorption of the adsorbent incorporated therein. . The dehumidifying rotor 2 is rotatably supported by a rotation shaft provided along the flow path direction at the center of both side surfaces of the casing, and by rotating the casing at a predetermined rotational speed, The action of desorption is continuously switched.

  The dehumidification rotor 2 is interposed in at least the air supply path S, and a built-in adsorbent adsorbs moisture in the air and has a function of dehumidifying the passing air, and the exhaust path E. It is defined as a regeneration region 22 having a function of dehumidifying the moisture adsorbed by the adsorbent incorporated therein and humidifying the air passing therethrough. In addition, it is desirable that the dehumidifying rotor 2 is formed with a purge region 23 that allows low-temperature air to pass through and cools the adsorbent contained therein before moving from the regeneration region 22 to the processing region 21. . In the purge area 23, if the adsorbent heated in the regeneration area 22 is introduced into the processing area 21 at a high temperature, the dehumidifying effect of the adsorbent may be reduced. It is provided for the purpose of cooling the material.

  As shown in FIG. 2, the dehumidification rotor 2 is provided with outer peripheral seals 28 along the outer peripheral edge for separating the outside and the inside of the dehumidification rotor 2 as shown in FIG. In order to divide P, partition seals 29, 29... Are provided along the radial direction.

  A cooling device 5 that cools the circulating air is disposed in front of the dehumidifying rotor 2 in the air supply path S, and a heating device 6 that heats the circulating air is disposed in front of the dehumidifying rotor 2 in the exhaust path E. ing.

  The cooling device 5 is a general air cooling coil cooled by a general air conditioning heat source device. As the heat source device, a compression type or absorption type refrigerator, a turbo refrigerator, an absorption refrigerator or a screw refrigerator, or a cooling device using a cooling source such as a heat pump, a heat exchanger or a heat storage tank is used. Can do.

  The heating device 6 can be a general heater such as an electric heater, a hot water coil, a steam coil, a refrigerant coil, an air heating coil such as an electric heating coil, or the like.

  The low dew point air path L is a flow path for discharging a part of the air that has passed through the processing region 21 of the dehumidifying rotor 2 into the closed space portion 10 and then discharging it out of the closed space portion 10. On the outlet side of the low dew point air passage L, a duct for introducing a part of the low dew point air in the air supply passage S arranged in the closed space portion 10 is provided after the processing region 21 and is branched. At the end, a blow-out port for blowing low dew point air into the closed space 10 is provided. The exhaust side of the low dew point air passage L is provided with a duct penetrating portion 15 connected to the exhaust side duct of the low dew point air passage L on the outer plate forming the closed space portion 10 to fill the closed space portion 10 with a low dew point. A duct for discharging air is connected to the duct penetrating portion 15.

  Each flow path S, E, P, L is provided with a damper for adjusting the flow rate of the flowing air and adjusting the atmospheric pressure in the flow path. In other words, the air supply path S is provided with dampers D1 and D2 in the vicinity of the introduction path and in the vicinity of the air supply path to the room, and the exhaust path E is provided in the vicinity of the introduction path from the air supply path S and to the outside. Dampers D3 and D4 are provided in the vicinity of the exhaust path, respectively. Further, a damper D5 is provided in the vicinity of the introduction path of the purge air supply path P, and dampers D6 and D7 are provided on the blowing side and the exhaust side of the low dew point air path L, respectively.

  In this embodiment, the flow rate adjustment damper D6 provided in the low dew point air passage L is provided in the closed space portion 10. For this reason, the flow path structure of the blowing side of the low dew point air path L can be simplified.

  In order to prevent the high dew point air outside the closed space portion 10 from entering the closed space portion 10 by setting the pressure inside the closed space portion 10 higher than the pressure outside the closed space portion 10, While monitoring the pressure in the closed space portion 10 with the pressure gauge 7 attached in the vicinity of the outlet of the duct penetrating portion 15 of the dew point air passage L, the air volume adjusting dampers D6 and D7 can be appropriately adjusted.

  With the above-described configuration, the following effects are exhibited in the dehumidifying apparatus 1A. That is, by forming the closed space portion 10 and providing a low dew point air passage L through which a part of the low dew point air that has passed through the treatment region 21 of the dehumidifying rotor 2 flows into the closed space portion 10, dehumidification The leaked air that enters the flow path from the gap portion such as the outer peripheral seal 28 of the rotor 2 is low dew point air instead of the conventional high dew point air. Problems such as dew point temperature rise can be solved.

  Further, since the dehumidifying rotor 2 is disposed on the suction side of the exhaust fan 4, the negative pressure due to the suction pressure of the exhaust fan 4 is maintained in the regeneration region 22, and the desorption efficiency is increased due to the negative pressure of the adsorbent. Will not be damaged. Thus, in the present dehumidifying apparatus 1A, while the regeneration region 22 is set to a negative pressure to increase the desorption efficiency of the adsorbent, the conflicting problem of preventing the dehumidification efficiency from being reduced by leaked air can be solved at the same time.

(Operating state of dehumidifier 1A)
Next, the operation state of the dehumidifier 1A according to the first embodiment will be described in detail.
In the dehumidifying apparatus 1A, a part of the low dew point air that has passed through the processing area 21 of the dehumidifying rotor 2 through the air supply path S is supplied to the room as the air supply SA, and the other part is supplied to the exhaust path E. Steady operation is performed. Specifically, the damper D2 is opened to supply the supply air SA into the room, and the steady operation is performed while adjusting the opening degree of the dampers D3 and D5 and controlling the amount of air supplied to the exhaust passage E. The amount of air supplied to the exhaust passage E is the amount of water adsorbed in the processing region 21 from the amount of moisture in the outside air calculated from the measured values of the temperature and humidity measuring device and the air flow measuring device (not shown) arranged in the air supply passage S. The amount of air is controlled to match the amount. In addition, the steady operation is performed while controlling the heating temperature of the regenerated air by the heating device 6 and the rotation speed of the dehumidifying rotor 2 so that the adsorbent is regenerated (moisture desorption) appropriately in the regeneration region 22. .

(Modification of the first embodiment)
Modification 1A ′ of the dehumidifying apparatus 1A according to the first embodiment will be described in detail with reference to FIG. In this modification, the configuration of the low dew point air passage L ′ is different from that in the first embodiment. That is, as in the first embodiment 1A, the low dew point air passage L ′ is provided with a flow rate adjusting damper D6 for adjusting the flow rate of the low dew point air passage L ′. An adjustment damper D6 is provided outside the closed space 10. Specifically, the duct penetration parts 16 and 17 are provided on the outer plate forming the closed space part 10, and the low dew point air passage L ′ once passes outside the closed space part 10 from the duct penetration part 16, The flow path configuration returns from the duct penetrating portion 17 back into the closed space portion 10. And the flow volume adjustment damper D6 is provided in the part which passes the outside of the closed space part 10. FIG. Thereby, the flow rate adjustment of the flow rate adjustment damper D6 can be easily performed, and the ventilation amount and the pressure into the closed space portion 10 can be easily adjusted.

[Second embodiment]
The dehumidifying device 1B according to the second embodiment of the present invention will be described in detail based on FIG.
In the dehumidifying apparatus 1B according to the second embodiment, the dehumidification rotor is provided in two stages along the flow path, and the first embodiment in that any of the dehumidification rotors 2a and 2b is located on the suction side of the exhaust fan 4. It is different from the example. By providing two stages of dehumidifying rotors, each stage corresponding to each dehumidifying rotor 2a, 2b is also provided in two stages. In FIG. 4, lower-case letters are used for the respective signs as equipment corresponding to the first stage dehumidifying rotor 2a. “A” is attached, and as a device corresponding to the second stage dehumidifying rotor 2 b, a lowercase “b” is attached to each symbol.

  In the present dehumidifying apparatus 1B, two stages of dehumidifying rotors 2a and 2b are disposed on the suction side of the exhaust fan 4, and the dehumidifying rotors 2a and 2b and a closed area surrounding the range including the flow paths before and after the dehumidifying rotors 2a and 2b are integrated. A space 10 is formed.

  In this dehumidifying apparatus 1B, since the dehumidification rotor is provided in two stages 2a and 2b, it is possible to manufacture a supply air SA having a dew point temperature lower than that of the dehumidifying apparatus 1A (for example, a dew point temperature of −70 ° C. to −90 ° C. or lower). Is preferred.

  The flow path configuration will be specifically described. First, in the air supply path S, outside air is introduced into the air supply path S by an air supply fan 3 provided in the vicinity of the inlet of the air supply path S, and the outside air OA is cooled by the cooling device 5a. After being cooled, the air is introduced into the processing region 21a of the first stage dehumidifying rotor 2a and dehumidified by the adsorbent. The air that has passed through the processing region 21a is cooled again by the cooling device 5b installed as necessary, and then introduced into the processing region 21b of the second-stage dehumidifying rotor 2b. The air that has passed through the second stage processing region 21b becomes low dew point air having a dew point temperature of about −60 ° C. to −90 ° C., and is blown as the supply air SA.

  On the other hand, in the exhaust path E, part of the air that has passed through the second stage processing region 21b is introduced into the exhaust path E by the suction force of the exhaust fan 4 provided near the outlet of the exhaust path E, and the purge flow path Pb. After being mixed with the air and heated by the heating device 6b, it is introduced into the regeneration region 22b of the second stage dehumidifying rotor 2b and desorbs the moisture adsorbed on the adsorbent. The air that has passed through the regeneration region 22b is mixed with the air in the purge flow path Pa, heated by the heating device 6a, introduced into the regeneration region 22a of the first-stage dehumidifying rotor 2a, and adsorbed by the adsorbent. Desorb moisture. After that, it passes through the exhaust fan 4 and is discharged to the outside as exhaust EA.

  In the low dew point air passage L, part of the air that has passed through the treatment region 21a of the first stage dehumidifying rotor 2a flows through the closed space portion 10 and then is discharged to the outside of the closed space portion 10.

(Modification of the second embodiment)
In the modified example 1B ′ of the dehumidifying apparatus 1B according to the second embodiment, as shown in FIG. 5, the configuration of the low dew point air passage L ′ is different from that of the second embodiment. That is, similarly to the modified example 1A ′ of the first embodiment, the low dew point air passage L ′ is provided with a flow rate adjusting damper D6 for adjusting the flow rate of the low dew point air passage L ′. The damper D6 is provided outside the closed space 10.

[Third embodiment]
A dehumidifying device 1C according to a third embodiment of the present invention will be described in detail with reference to FIG.
In the dehumidifying device 1C according to the third embodiment, as compared with the dehumidifying device 1B according to the second embodiment, two stages of dehumidifying rotors are provided along the flow path, and the second stage of the dehumidifying rotor 2b is The difference is that a closed space portion 10 is formed which is located on the suction side of the exhaust fan 4 and integrally surrounds the range including the dehumidifying rotor 2b and the flow paths before and after the dehumidifying rotor 2b.

  Specifically, the exhaust fan 4 is disposed in the exhaust path E between the first-stage dehumidification rotor 2a and the second-stage dehumidification rotor 2b. At this time, the closed space portion 10 is formed so as to integrally surround a range including the exhaust fan 4, the second-stage dehumidification rotor 2 b disposed on the suction side of the exhaust fan 4, and the flow paths before and after the rotor. To do. Since the closed space 10 completely surrounds the suction side of the exhaust fan 4 including the exhaust fan 4 in this way, external air enters even if a gap occurs in the connection portion between the exhaust fan 4 and the suction side duct. In addition, it is possible to prevent a decrease in the dehumidification efficiency in the first-stage dehumidification rotor 2a disposed in the subsequent stage of the exhaust passage E.

  The low dew point air path L is a flow path for supplying a part of the air in the air supply path S that has passed through the processing region 21a of the first stage dehumidifying rotor 2a into the closed space portion 10. In the illustrated example, since the low dew point air passage L is provided from the air supply passage S outside the closed space portion 10, a duct of the low dew point air passage L is provided on the outer plate forming the closed space portion 10. A penetrating duct penetrating part 18 is formed.

[Fourth embodiment]
A dehumidifying device 1D according to a fourth embodiment of the present invention will be described in detail with reference to FIG.
In the dehumidifying device 1D according to the fourth embodiment, as compared with the dehumidifying device 1A according to the first embodiment, the second closed space portion 30 surrounding the dehumidifying rotor 2 is formed in the closed space portion 10. A second low dew point air passage L2 for allowing a part of the low dew point air that has passed through the processing region 21 of the dehumidifying rotor 2 disposed in the second closed space 30 to flow in the second closed space 30 is provided. The provision differs in that the second closed space 30 is filled with low dew point air.

  As shown in detail in FIG. 8, the second closed space 30 is configured so that the dehumidification rotor 2 and the connecting portion of the duct connected to the dehumidification rotor 2 do not generate a gap with the outside by a casing body such as a metal plate. It is an enclosed closed space region. In the illustrated example, a dehumidification rotor having a central portion supported by a rotor shaft 24 and a bearing 25 is rotatably disposed in a casing body 31 having a substantially square cross section, and a drive motor 26 that rotates the dehumidification rotor and A drive chain 27 that is wound around the pulley of the drive motor 26 and the outer periphery of the dehumidifying rotor 2 and transmits the driving force of the drive motor 26 to the dehumidifying rotor 2 is disposed. In addition, the casing body 31 forming the second closed space portion 30 is provided with a connection port 32 to which a pipe on the supply side of the second low dew point air passage L2 is connected at the lower portion of the side surface, and its diagonal position. A connection port 33 is provided in the upper portion of the opposite side surface to which the exhaust side pipe of the second low dew point air passage L2 is connected. In addition, an air volume adjustment valve V1 is provided in the supply side piping of the second low dew point air passage L2, and an air volume adjustment valve V2 is provided in the exhaust side piping. Further, as shown in FIG. 7, the outer plate forming the closed space portion 10 is connected to a pipe for exhausting the air that has passed through the second closed space portion 30 to the outside of the closed space portion 10. A through portion 19 is formed.

  In the second low dew point air passage L2, since the second closed space 30 is a relatively narrow space, a relatively small air volume is sufficient, and a small diameter stainless steel pipe or the like can be used as a pipe forming the flow path. . Further, as the air volume adjusting valves V1, V2, stainless steel valves for piping can be used.

  Thus, in the fourth embodiment, since the second closed space portion 30 surrounding the dehumidification rotor 2 that is most likely to cause air leakage is provided, the inside of the narrow second closed space portion 30 surrounding the dehumidification rotor 2 is provided. Air can be quickly replaced with low dew point air at the start of operation, and problems such as a decrease in the dehumidifying efficiency of the adsorbent and an increase in the dew point temperature of the supply air S can be quickly solved immediately after the start of operation.

(Modification of the fourth embodiment)
As shown in FIG. 9, the modified example 1D ′ of the fourth embodiment is similar to the modified example 1A ′ of the first embodiment, and the low dew point air passage L ′ is connected to the low dew point air passage L ′. The flow rate adjustment damper D6 for adjusting the flow rate of the flow rate is provided, and the flow rate adjustment damper D6 is provided outside the closed space 10.

[Fifth embodiment]
As shown in FIG. 10, the dehumidifying device 1E according to the fifth embodiment of the present invention is provided with each dehumidifying rotor 2a, 2b disposed in the closed space portion 10 of the dehumidifying device 1B according to the second embodiment. On the other hand, the second closed space portions 30a and 30b are provided in the same manner as the dehumidifying device 1D according to the fourth embodiment.

(Modification of the fifth embodiment)
As shown in FIG. 11, the modified example 1E ′ of the fifth embodiment is similar to the modified example 1A ′ of the first embodiment in that the low dew point air passage L ′ is connected to the low dew point air passage L ′. The flow rate adjustment damper D6 for adjusting the flow rate of the flow rate is provided, and the flow rate adjustment damper D6 is provided outside the closed space 10.

[Sixth embodiment]
As shown in FIG. 12, the dehumidifying device 1F according to the sixth embodiment of the present invention is relative to the dehumidifying rotor 2b disposed in the closed space portion 10 of the dehumidifying device 1C according to the third embodiment. The second closed space 30b is provided in the same manner as the dehumidifier 1D according to the fourth embodiment.

1 is a system configuration diagram of a dehumidifier 1A according to a first embodiment of the present invention. 3 is a perspective view of a dehumidifying rotor 2. FIG. It is a system configuration figure of dehumidification apparatus 1A 'concerning the modification of the 1st form example. It is a system block diagram of the dehumidification apparatus 1B which concerns on a 2nd form example. It is a system configuration figure of dehumidification apparatus 1B 'concerning a modification of the 2nd form example. It is a system block diagram of 1 C of dehumidification apparatuses which concern on a 3rd form example. It is a system configuration figure of dehumidification apparatus 1D concerning the 4th form example. The 2nd closed space part 30 is shown, (A) is front sectional drawing, (B) is a side view. It is a system configuration figure of dehumidification apparatus 1D 'concerning the modification of the 4th form example. It is a system block diagram of the dehumidification apparatus 1E which concerns on a 5th form example. It is a system configuration figure of dehumidification apparatus 1E 'concerning the modification of the 5th form example. It is a system configuration | structure figure of the dehumidification apparatus 1F which concerns on a 6th form example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1A-1F ... Dehumidifier, 2 ... Dehumidification rotor, 3 ... Supply fan, 4 ... Exhaust fan, 5 ... Cooling device, 6 ... Heating device, 10 ... Closed space part, 21 ... Processing area | region, 22 ... Reproduction | regeneration area | region, 23 ... Purge region, 30 ... Second closed space, S ... Air supply path, E ... Exhaust path, P ... Purge air supply path, L ... Low dew point air path, L2 ... Second low dew point air path

Claims (6)

A treatment region having a function of adsorbing moisture by a built-in adsorbent and a regeneration region having a function of desorbing moisture by the built-in adsorbent are provided across an air supply path for supplying outside air and an exhaust path for exhausting air. A dehumidification rotor in which a dehumidification rotor defined in each region is disposed, an air supply fan is provided in the air supply path, and an exhaust fan is provided in the exhaust path,
The dehumidification rotor is disposed on the suction side of the exhaust fan, and a closed space portion that integrally surrounds the range including the dehumidification rotor and the flow paths before and after the dehumidification rotor is formed, and passes through the processing region of the dehumidification rotor. A dehumidifying device, wherein a low dew point air passage for allowing a part of the low dew point air to flow in the closed space portion is provided to fill the closed space portion with low dew point air.   The dehumidifying device according to claim 1, wherein the dehumidifying rotor is provided in two stages along the flow path, and at least one of the dehumidifying rotors is located on a suction side of the exhaust fan.   The dehumidifier according to claim 1, wherein the pressure in the closed space is set to be higher than the atmospheric pressure outside the closed space.   In the closed space portion, a second closed space portion surrounding the dehumidifying rotor is formed, and a part of the low dew point air that has passed through the treatment area of the dehumidifying rotor disposed in the second closed space portion is The dehumidifying device according to any one of claims 1 to 3, wherein the second closed space portion is filled with low dew point air by providing a second low dew point air passage that circulates in the closed space portion.   The dehumidifying device according to any one of claims 1 to 4, wherein a flow rate adjusting damper for adjusting a flow rate of the low dew point air path is provided in the low dew point air path, and the flow rate adjusting damper is provided in the closed space portion. .   The dehumidification according to any one of claims 1 to 4, wherein a flow adjustment damper for adjusting a flow rate of the low dew point air passage is provided in the low dew point air passage, and the flow adjustment damper is provided outside the closed space portion. apparatus.

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