JP2015047579A - Dehumidification system for dry rooms - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dry room dehumidification system for dehumidifying air by using a dehumidification unit (20) in which two sorption heat exchangers (22, 24) are alternately switched to a sorption side and a regeneration side, to suppress humidity fluctuations of air supplied to the room and to maintain the dew point temperature of air in the room to a target value or lower.SOLUTION: A humidification adjustment member (31) in which a sorption agent is disposed on plural air channels (32a) having different lengths to each other, is disposed on an air feeding channel (11), and a pressure loss adjustment part (33) for suppressing variations of pressure loss, caused by disposition of the plural air channels (32a) having different lengths to each other, is provided on the humidification adjustment member (31).

Description

  The present invention relates to a dehumidifying system for dehumidifying a dry room using a dehumidifying unit having an adsorption heat exchanger having an adsorbent on the surface.

  2. Description of the Related Art Conventionally, a dehumidifying unit that performs dehumidification of a humidity control space using an adsorption heat exchanger having an adsorbent provided on the surface is known (see Patent Document 1 below).

  The dehumidifying unit has a refrigerant circuit in which a compressor, an expansion mechanism, and two adsorption heat exchangers are connected and the refrigerant circulation direction is alternately switched every predetermined time. In the adsorption heat exchanger functioning as an evaporator of the dehumidifying unit, an adsorption operation in which moisture in the passing air is adsorbed by the adsorbent is performed, and the adsorption heat generated at that time is absorbed by the refrigerant. On the other hand, in the adsorption heat exchanger functioning as a condenser, a regeneration operation is performed in which moisture adsorbed by the adsorbent is heated by the refrigerant to be desorbed from the adsorbent to regenerate the adsorbent.

  In the dehumidifying unit, the two adsorption heat exchangers alternately switch between the adsorption-side evaporator and the regeneration-side condenser, thereby alternately performing the adsorption operation and the regeneration operation. And in the said dehumidification unit, the humidity control space is dehumidified by supplying the air which passed the adsorption heat exchanger which functions as an evaporator to a humidity control space.

  The dehumidifying unit may be used in a dehumidifying system that performs dehumidification in a dry room where air with a low dew point (for example, a dew point temperature of minus 50 ° C.) is required.

JP 2010-281476 A

  By the way, in a dehumidifying system for a dry room, unlike the case of a normal dehumidifying device for a room, it is always necessary to set the dew point temperature of the indoor air, as long as the average value of the dehumidifying amount within a certain time is not less than the target value. It is required to keep below the target value.

  However, in the dehumidifying unit in which the two adsorption heat exchangers as described above are switched alternately between the evaporator and the condenser, the temperature of the adsorption heat exchanger is high immediately after switching from the condenser to the evaporator. While the passing air is not sufficiently dehumidified, the humidity of the air becomes high, but after a little time has passed since switching to the evaporator, the temperature of the adsorption heat exchanger decreases, and the passing air is sufficiently dehumidified. As a result, the humidity of the air decreases. Thus, in the said dehumidification system, since the humidity of the air which passed the evaporator raises or falls with progress of time, there existed a problem that the humidity of the air supplied to a dry room fluctuated. If the humidity of the supplied air fluctuates, it becomes difficult to always keep the dew point temperature of the indoor air below the target value.

  The present invention has been made in view of such a point, and an object of the present invention is to use a dehumidification unit in which two adsorption heat exchangers are alternately switched to an adsorption side (evaporator) and a regeneration side (condenser). In the dehumidification system that dehumidifies the air, the humidity fluctuation of the air supplied to the room of the dry room is suppressed, and the dew point temperature of the room air is always kept below the target value.

  A first aspect of the present invention is a dehumidifying unit comprising a first adsorption heat exchanger (22) and a second adsorption heat exchanger (24) that are provided with an adsorbent on the surface and alternately switch between an adsorption side and a regeneration side ( 20) and the adsorption heat exchanger (22, 24) on the adsorption side of the first adsorption heat exchanger (22) and the second adsorption heat exchanger (24) of the dehumidification unit (20). It is assumed that the dehumidification system for a dry room is provided with an air supply passage (11) for introducing the conducted air into the dehumidification target space (S).

  The dehumidifying system for the dry room is provided with an adsorbent in a plurality of air flow paths (32a) that are arranged in the air supply passage (11) and through which the air flowing through the air supply passage (11) passes, In addition, a humidity adjusting member (31) having a plurality of air flow paths (32a) with different flow lengths and a plurality of air flow paths (32a) having different lengths are provided on the humidity adjusting member (31). And a pressure loss adjusting unit (33) for suppressing variations in pressure loss due to the above.

  In the first aspect of the invention, the flow path length of the air flow path (32a) of the humidity adjustment member (31) arranged in the air supply passage (11) is different, so that the humidity adjustment member (31) Air humidity fluctuations can be suppressed. Specifically, as shown in FIG. 6B, when the adsorption heat exchanger (22, 24) is switched from the regeneration side to the adsorption side, the timing and magnitude of the peak of humidity fluctuation are As shown in (a) to (d), since the thickness varies depending on the thickness of the humidity adjusting member (31), the length of the air flow path (32a) is changed to change the thickness of the humidity adjusting member (31). If this is done, the range of humidity fluctuations becomes smaller as shown by the solid line waveform.

  In addition, a plurality of air flow paths (32a) having different lengths are formed in the humidity adjustment member (31), whereas a pressure loss adjustment unit for suppressing variations in pressure loss in the humidity adjustment member (31) Since (33) is provided, the flow rate of the air passing through each air flow path (32a) is made uniform.

  According to a second invention, in the first invention, the humidity adjusting member (31) is configured by a honeycomb structure (32) in which an adsorbent is supported on the air flow path (32a), and is upstream of the air flow direction. At least one of the end face on the side and the end face on the downstream side is formed by an inclined surface (32b) inclined with respect to the air flow direction.

  In the second aspect of the invention, at least one of the upstream end face and the downstream end face in the air flow direction of the honeycomb structure (32) used in the humidity adjusting member (31) is inclined. Since the thickness of the adjustment member (31) is non-uniform, the width of the humidity fluctuation becomes small as in the first invention.

  According to a third invention, in the second invention, the pressure loss adjusting portion (33) is constituted by a second honeycomb structure (34) in which an adsorbent is not supported on the air flow path (32a), and the humidity adjusting member (31) and the pressure loss adjusting portion (34) are configured to be a rectangular parallelepiped or a cubic block by combining the honeycomb structure (32) and the second honeycomb structure (34). Yes.

  In the third aspect of the invention, the humidity adjusting member (31) and the pressure loss are reduced by combining the second honeycomb structure (34) with the honeycomb structure (32) having the inclined end face on the upstream side or the end face on the downstream side. Since the adjustment portion (33) is in the shape of a rectangular parallelepiped or a cubic block, the effect of canceling out the pressure loss variation of the honeycomb structure (32) occurs in the second honeycomb structure (34), and the humidity adjustment member (31) The flow rate of air passing through each air flow path (32a) is made uniform.

  The fourth invention is characterized in that, in the third invention, the second honeycomb structure (34) is arranged upstream of the honeycomb structure (32) in the air flow direction.

  In the fourth aspect of the invention, the second honeycomb structure (34) is arranged on the upstream side of the honeycomb structure (32), so that the air whose temperature fluctuation is suppressed in the second honeycomb structure (34) is the second. Humidity fluctuation is reduced by supplying the honeycomb structure (34) and the air passing through the second honeycomb structure (34).

  According to a fifth invention, in the first invention, the humidity adjusting member (31) is constituted by a honeycomb structure (35) in which an adsorbent is supported in an air flow path (35a), and the honeycomb structure (35 ), But at least one of the upstream end face and the downstream end face in the air flow direction is formed by a stepped surface (35b), so that the thickness in the air flow direction is gradually increased in a plurality of portions. It is characterized by changes.

  In the fifth aspect of the invention, the humidity adjusting member (31) is formed using the honeycomb structure (35) in which at least one of the upstream end surface and the downstream end surface in the air flow direction is formed by the stepped surface (35b). Since the thickness is changed, the range of the humidity fluctuation becomes small as in the first invention.

  In a sixth aspect based on the fifth aspect, the pressure loss adjusting portion (33) has a plurality of openings (36a, 36b, 36c) through which air passes correspond to a plurality of portions of the honeycomb structure (35). A pressure loss adjusting plate (36) formed at a position where the opening (36a, 36b, 36c) of the pressure loss adjusting plate (36) has a thickness in the air flow direction of the honeycomb structure (35). The thinner the portion, the smaller the opening area, and the thicker the portion, the larger the opening area.

  According to a seventh aspect, in the fifth aspect, the pressure loss adjusting section (33) is configured to reduce the air flow area as the thickness of the honeycomb structure (35) in the air flow direction decreases. It is characterized by having a large air circulation area.

  In the sixth and seventh inventions, the flow rate of the air flowing through the honeycomb structure (35) as the humidity adjusting member (31) is made uniform by the pressure loss adjusting unit (33).

  According to an eighth invention, in the first invention, the humidity adjusting member (31) is configured by filling the first air-permeable box (39a) with the first granular material (38a) carrying the adsorbent. The second air permeability that the pressure loss adjusting part (33) becomes a rectangular parallelepiped or a cube by combining the second granular material (38b) not carrying the adsorbent with the first air permeability box (39a). It is characterized by being filled in the box (39b).

  In the eighth aspect of the invention, the humidity is adjusted by combining the first breathable box (39a) filled with the first granule and the second breathable box (39b) filled with the second granule (38b). Variations in the pressure loss of the member (31) are suppressed, and fluctuations in air humidity are suppressed by the first granules in the first air-permeable box (39a).

  According to a ninth invention, in the first invention, the humidity adjusting member (31) and the pressure loss adjusting unit (33) are a plurality of fins (40a) arranged in parallel to a line segment in the air flow direction, The air flow direction of the portion where the adsorbent layer (40b) is supported by the fin (40a), which is constituted by the adsorbent fin structure (40) having the adsorbent layer (40b) formed on these fins (40a). The length of each of the fins (40a) is different.

  In the ninth aspect of the invention, the air passes through the humidity adjusting member (31) formed by the plurality of fins (40a) on which the adsorbent layer (40b) is formed. It can be suppressed. Further, in this configuration, the adsorption fin structure (40) serves as the humidity adjusting member (31) and the pressure loss adjusting unit (33), and the pressure loss when air passes through the humidity adjusting member (31) is reduced. Variations are also suppressed.

  According to the present invention, the air supplied into the room of the dry room (S) by providing the air supply passage (11) with the humidity adjusting member (31) having a plurality of air flow paths (32a) having different lengths. Therefore, the dew point temperature of the indoor air can always be kept below the target value.

  In addition, by providing a pressure loss adjustment section (33) for suppressing variations in pressure loss in the humidity adjustment member (31) in which a plurality of air flow paths (32a) having different lengths are formed, Since the pressure loss of the passing air is made uniform and the air flows uniformly through the humidity adjusting member (31), it is possible to more effectively suppress the humidity fluctuation.

  According to the second aspect of the invention, the humidity adjustment is performed by inclining at least one of the upstream end face and the downstream end face of the honeycomb structure (32) used in the humidity adjusting member (31) in the air flow direction. Since the thickness of the member (31) is changed, the fluctuation range of the humidity of the air supplied to the room is reduced, and the dew point temperature of the indoor air can always be kept below the target value.

  According to the third aspect of the invention, by combining the honeycomb structure (32) and the second honeycomb structure (34), the humidity adjusting member (31) and the pressure loss adjusting portion (33) are formed in a rectangular parallelepiped or cubic block shape. Therefore, the variation in pressure loss of the honeycomb structure (32) can be offset by the second honeycomb structure (34), and each air flow path (32a) of the humidity adjusting member (31) Since the flow rate of the passing air can be made uniform, it becomes possible to more effectively suppress the humidity fluctuation.

  According to the fourth aspect of the present invention, the second honeycomb structure (34) is disposed upstream of the honeycomb structure (32), so that the air whose temperature fluctuation is suppressed in the second honeycomb structure (34) is prevented. Since the second honeycomb structure (34) is supplied to the second honeycomb structure (34), the air humidity fluctuation can be effectively reduced by the second honeycomb structure (34).

  According to the fifth aspect of the present invention, the humidity adjusting member (35) is formed using the honeycomb structure (35) in which at least one of the upstream end surface and the downstream end surface in the air flow direction is formed by the stepped surface (35b). By changing the thickness of 31), the humidity fluctuation range of the air supplied from the outlet of the humidity adjusting member (31) to the room can be reduced, so the dew point temperature of the indoor air is always the target value. It becomes possible to keep below.

  According to the sixth and seventh aspects of the present invention, the pressure loss adjusting section (33) makes the flow rate of the air flowing through the honeycomb structure (35) of the humidity adjusting member (31) uniform, so that the humidity fluctuations Can be suppressed more effectively.

  According to the eighth aspect of the invention, by combining the first breathable box (39a) filled with the first granule and the second breathable box (39b) filled with the second granule (38b), While suppressing variations in pressure loss, the first granule in the first breathable box (39a) can suppress fluctuations in the humidity of the air on the outlet side, so the dew point temperature of indoor air is always kept below the target value. It becomes possible.

  According to the ninth aspect of the present invention, when air passes through the adsorption fin structure (40) constituted by the plurality of fins (40a) on which the adsorbent layer (40b) is formed, variation in pressure loss is suppressed. In addition, since fluctuations in the humidity of the air supplied to the room can be suppressed, the dew point temperature of the indoor air can always be kept below the target value.

FIG. 1 is a block diagram showing a first operation in normal operation in the dehumidification system according to Embodiment 1 of the present invention. FIG. 2 is a block diagram showing a second operation of the normal operation in the dehumidification system of FIG. FIG. 3 is a block diagram showing the operation of the drying operation in the dehumidifying system of FIG. FIG. 4A is a perspective view showing the honeycomb structure and the second honeycomb structure separately, and FIG. 4B is a perspective view showing a state where the honeycomb structure and the second honeycomb structure are combined. . FIG. 5 is a graph showing the relationship between the absolute humidity at the outlet of the humidity adjusting member and the passage of time. FIG. 6A is a schematic diagram when humidity adjusting members having different thicknesses are arranged in the air supply passage, and FIG. 6B is an absolute humidity and time at the outlet of the humidity adjusting member of FIG. It is a graph which shows the relationship with progress. 7A is a perspective view of a humidity adjusting member (honeycomb structure) according to Embodiment 2, and FIG. 7B is a cross-sectional view in which the humidity adjusting member of FIG. 7A is arranged in an air supply passage. is there. FIG. 8A is a perspective view of a humidity adjusting member (honeycomb structure) according to a modification of the second embodiment, and FIG. 8B is a diagram in which the humidity adjusting member of FIG. It is sectional drawing. FIG. 9 is a cross-sectional structure diagram of a humidity adjusting member according to another embodiment 1. FIG. 10 is a cross-sectional structure diagram of a humidity adjusting member according to another embodiment 2.

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

Embodiment 1 of the Invention
A first embodiment of the present invention will be described.

  Embodiment of this invention is related with the dehumidification system (10) which dehumidifies a dry room (S). In the present embodiment, the dry room (S) subject to humidity adjustment has a low dew point (for example, a dew point of about −30 ° C.) generated by a dehumidifier (80) different from the dehumidifier system (10). It is provided in the supplied constant temperature and humidity space (S1). In the first embodiment, the dehumidification system (10) takes in the air in the constant temperature and constant humidity space (S1) dehumidified by the dehumidification device (80), and has a dew point temperature lower than the air in the constant temperature and constant humidity space (S1). The air is dehumidified so as to be air (for example, dew point −50 ° C.) and supplied to the dry room (S).

  As shown in FIG. 1, the dehumidification system (10) includes first and second adsorption heat exchanges in an air supply passage (11) through which air supplied to the dry room (S) flows and a dehumidification unit (20) described later. And a regeneration air passage (12) through which regeneration air for regenerating the adsorbent of the vessel (22, 24) flows. The supply passage (11) and the regeneration air passage (12) have first and second adsorption heat exchangers (22, 24) provided with an adsorbent on the surface and alternately switched between the adsorption side and the regeneration side. And a dehumidifying unit (20) for dehumidifying the air. The air supply passage (11) dehumidifies the air dehumidified by the adsorption heat exchanger on the adsorption side of the first and second adsorption heat exchangers (22, 24) of the dehumidification unit (20). It is a passage to be introduced into the dry room (S), which is a space.

  The air supply passage (11) has an inflow end (70a) in which the inflow end is opened in the constant temperature and humidity space (S1) and the air in the constant temperature and humidity space (S1) flows, and the inflow passage (70a) The first branch passage (70b) of the two branch passages branched from the outflow end. On the other hand, the regeneration air passage (12) includes the inflow passage (70a) and a second branch passage (70c) of the two branch passages branched from the outflow end of the inflow passage (70a). ing. The outflow end of the first branch passage (70b) is opened in the dry room (S), and the outflow end of the second branch passage (70c) is opened outside the constant temperature and humidity space (S1).

  The dehumidifying unit (20) is connected to the first branch passage (70b) of the air supply passage (11) and the second branch passage (70c) of the regeneration air passage (12). On the downstream side of the dehumidifying unit (20) of the air supply passage (11), a heater (30), a humidity adjusting member (31), and a first damper (13) are connected to the dry room from the dehumidifying unit (20). They are connected in order toward (S). Further, the downstream side of the humidity adjusting member (31) of the air supply passage (11) and the downstream side of the dehumidifying unit (20) of the regeneration air passage (12) are connected by the communication passage (15), and the communication passage (15) is provided with a second damper (14).

  As described above, in the first embodiment, the air supply passage (11) uses the adsorption heat exchanger (22, 24) that functions as an evaporator in the dehumidifying unit (20) for the air taken in from the constant temperature and humidity space (S1). ) And dehumidify it, then supply it indoors. On the other hand, the regeneration air passage (12) regenerates the adsorbent of the adsorption heat exchanger (22, 24) that functions as a condenser of the dehumidifying unit (20), which will be described later, from the air taken in from the constant temperature and humidity space (S1). After being used for the above, it is configured to discharge to the outside of the constant temperature and humidity space (S1).

  In the constant temperature and humidity space (S1) in which the dehumidification system (10) of this embodiment is provided, the dehumidification device (80) that generates air having a low dew point different from the dehumidification system (10), and the dehumidification device ( An air supply passage (81) for supplying the low dew point air generated in 80) to the constant temperature and humidity space (S1) is provided. The dry room (S) is provided with an exhaust passage (82) for exhausting indoor air to the outside, and the exhaust passage (82) is provided with a damper (83) for adjusting the amount of air discharged. . The damper (83) is controlled by the following controller (50) for opening / closing and opening.

  The dehumidification system (10) includes a normal operation and a controller (50) that performs a drying operation after the start-up and before the execution of the normal operation. In normal operation, air that has been adjusted to the desired temperature and humidity through the adsorption heat exchanger (22, 24), heater (30), and humidity adjustment member (31) functioning as an evaporator of the dehumidification unit (20) Is supplied to the dry room (S). In the drying operation, the air flowing into the humidity adjusting member (31) is heated by the heater (30) until the humidity adjusting member (31) is in a predetermined dry state. Specific driving operations will be described later.

<Dehumidification unit>
The dehumidifying unit (20) includes a refrigerant circuit (20a), a casing (20b) that houses the refrigerant circuit (20a), and a first and a second that are provided in the casing (20b) and switch the air flow path. A flow path switching unit (26, 27), an air supply fan (28), and an exhaust fan (29) are provided. The refrigerant circuit (20a) includes a compressor (21), a first adsorption heat exchanger (22), an expansion valve (23), a second adsorption heat exchanger (24), and a four-way switching valve (25). And are connected.

  The compressor (21) is a rotary fluid machine such as a rotary type, a swing type, or a scroll type, and is configured in a variable capacity type in which an operation frequency is adjusted by an inverter circuit. The first and second adsorption heat exchangers (22, 24) are formed by supporting an adsorbent such as a polymer sorbent or B-type silica gel on the surface of a fin-and-tube heat exchanger. The first and second adsorption heat exchangers (22, 24) are accommodated in separate accommodation chambers (not shown) in the casing (20b). The expansion valve (23) is an electric valve configured to have a variable opening.

  The four-way switching valve (25) has four ports from first to fourth, the first port is connected to the discharge side of the compressor (21), and the third port is the suction side of the compressor (21). It is connected to the. The first adsorption heat exchanger (22), the expansion valve (23), and the second adsorption heat exchanger (24) are connected in order from the second port of the four-way switching valve (25) to the fourth port. ing. The four-way switching valve (25) has a first state (state indicated by a solid line in FIG. 1) in which the first port and the second port communicate with each other and a third port and the fourth port communicate with each other, It is configured to be switchable to a second state (state indicated by a solid line in FIG. 2) in which the 4 ports communicate and the second port and the third port communicate.

  When the four-way selector valve (25) switches to the first state, the second adsorption heat exchanger (24) functions as an evaporator to dehumidify the air, and the first adsorption heat exchanger (22) functions as a condenser. To regenerate the adsorbent. On the other hand, when the four-way switching valve (25) switches to the second state, the first adsorption heat exchanger (22) functions as an evaporator to dehumidify the air, and the second adsorption heat exchanger (24) is a condenser. Function as an adsorbent to regenerate. That is, the four-way switching valve (25) switches the refrigerant circulation direction in the refrigerant circuit (20a) so that the adsorption heat exchanger and the evaporator function as a condenser in the two adsorption heat exchangers (22, 24). The adsorption heat exchanger functioning as

  The first and second flow path switching sections (26, 27) are constituted by a plurality of openable / closable dampers. The first flow path switching unit (26) is provided in a space on the upstream side of the storage chamber that houses the first and second adsorption heat exchangers (22, 24), respectively, and the second flow path switching unit (27) The first and second adsorption heat exchangers (22, 24) are provided in a space on the downstream side of the storage chamber. The first and second flow path switching sections (26, 27) are connected to the air supply passage (11) and the regeneration air passage (12), respectively.

  When the four-way switching valve (25) is in the first state, the first and second flow path switching units (26, 27) are brought into the first flow state (state shown by the solid line in FIG. 1) by the controller (50). When the four-way switching valve (25) is in the second state, it is controlled so as to be in the second flow state (the state indicated by the solid line in FIG. 2). In the first distribution state, the first and second flow path switching sections (26, 27) both communicate with the supply passage (11) and the storage chamber (not shown) of the second adsorption heat exchanger (24). And the regeneration air passage (12) and the accommodation chamber (not shown) of the first adsorption heat exchanger (22) are communicated with each other. On the other hand, in the second flow state, the first flow path switching unit (26) and the second flow path switching unit (27) are both in the supply passage (11) and the accommodation chamber of the first adsorption heat exchanger (22). (Not shown) is communicated, and the regeneration air passage (12) and the accommodation chamber (not shown) of the second adsorption heat exchanger (24) are communicated.

  The air supply fan (28) is housed in a portion connected to the air supply passage (11) on the downstream side of the second flow path switching unit (27) in the casing (20b), and air is supplied to the air supply passage (11). Form a flow. On the other hand, the exhaust fan (29) is accommodated in a portion connected to the regeneration air passage (12) on the downstream side of the second flow path switching section (27) in the casing (20b), and the regeneration air passage (12 ) To form an air flow.

<Heater>
In the first embodiment, the heater (30) is configured by an electric heater. The heater (30) is connected to the controller (50) by wire or wirelessly, and the amount of heating is controlled by the controller (50).

<Humidity adjustment member>
As shown in FIGS. 4A and 4B, the humidity adjusting member (31) is a porous block-shaped honeycomb structure (32) in which a large number of through-holes extending in parallel are formed in the first embodiment. It is comprised by.

  In the honeycomb structure (32), a large number of air passages (32a) are formed in the air supply passage (11) so as to extend along the air flow direction of the air supply passage (11). An adsorbent is supported on the inner surface of the air flow path (32a) of the honeycomb structure (32).

  The honeycomb structure (32) is formed of an inclined surface (32b) (which may be a stepped surface) whose upstream end surface in the air flow direction is inclined with respect to the air flow direction. The channel length of the channel (32a) is different. Since the length of the air flow path (32a) of the honeycomb structure (32) is different, the honeycomb structure (32) varies in pressure loss. Therefore, in the present embodiment, the pressure loss adjusting unit (33) is provided as a pressure loss adjusting unit (33) for suppressing variations in pressure loss due to the honeycomb structure (32) provided with a plurality of air flow paths (32a) having different lengths. A two-honeycomb structure (34) is used.

  The second honeycomb structure (34) has a large number of air flow paths (34a) on which no adsorbent is supported. The second honeycomb structure (34) has an inclined surface (34b) (or staircase) in which an end surface on the downstream side in the air flow direction is inclined in the same direction as the inclined surface of the honeycomb structure (32) with respect to the air flow direction. Shaped surface). Then, by combining the honeycomb structure (32) and the second honeycomb structure (34), the humidity adjusting member (31) and the pressure loss adjusting section (33) form one rectangular parallelepiped or cubic block. ing.

  The second honeycomb structure (34) is disposed upstream of the honeycomb structure (32) in the air flow direction. However, the positional relationship between the upstream side and the downstream side of the honeycomb structure (32) and the second honeycomb structure (34) may be reversed.

  In the above configuration of the humidity adjusting member (31), after the air flowing through the air supply passage (11) is dehumidified by the dehumidifying unit (20), the multiple air flow paths (32a) of the humidity adjusting member (31) are provided. pass.

<damper>
A 1st damper (13) and a 2nd damper (14) are comprised so that it may switch to an open state and a closed state, and block | close each air path installed by switching from an open state to a closed state. It is configured. The first damper (13) and the second damper (14) are connected to the controller (50) by wire or wirelessly, and switching between the open state and the closed state is controlled by the controller (50).

<Sensor>
The dehumidifying system (10) is provided with a first temperature sensor (61), a second temperature sensor (62), and a humidity sensor (63). The first temperature sensor (61) is provided between the heater (30) of the air supply passage (11) and the humidity adjusting member (31), and detects the temperature of the air that has passed through the heater (30). The second temperature sensor (62) is provided on the downstream side of the humidity adjusting member (31) of the air supply passage (11) and detects the temperature of the air that has passed through the humidity adjusting member (31). The humidity sensor (63) is provided on the downstream side of the humidity adjusting member (31) of the air supply passage (11), and detects the relative humidity of the air that has passed through the humidity adjusting member (31). The first temperature sensor (61), the second temperature sensor (62), and the humidity sensor (63) are each configured to output detection values to the controller (50), and the controller (50) Various controls are performed based on the detected value.

-Driving action-
In this dehumidification system (10), a normal operation and a drying operation are executed by the controller (50). Drying operation is performed after starting and before the start of normal operation.

<Normal operation>
During normal operation of the dehumidification system (10), the first damper (13) is controlled to be in the open state, while the second damper (14) is controlled to be in the closed state. Further, the air supply fan (28) and the exhaust fan (29) of the dehumidifying unit (20) are driven with a predetermined air volume. Thereby, air flows through each of the air supply passage (11) and the regeneration air passage (12).

  Further, the refrigerant circulates in the refrigerant circuit (20a) to perform a vapor compression refrigeration cycle. Specifically, the compressor (21) is operated, the expansion valve (23) is controlled to a predetermined opening degree, and the four-way switching valve (25) is alternately switched between the first state and the second state.

  When the four-way switching valve (25) is switched to the first state, the refrigerant compressed by the compressor (21) passes through the four-way switching valve (25) and flows into the first adsorption heat exchanger (22). . The refrigerant flowing into the first adsorption heat exchanger (22) dissipates heat to the adsorbent and the passing air and condenses. The refrigerant that has dissipated heat and condensed in the first adsorption heat exchanger (22) is decompressed by the expansion valve (23), and then flows into the second adsorption heat exchanger (24). The refrigerant flowing into the second adsorption heat exchanger (24) absorbs heat from the adsorbent and the passing air and evaporates. The refrigerant that has absorbed heat and evaporated in the second adsorption heat exchanger (24) is sucked into the compressor (21) and compressed.

  On the other hand, when the four-way switching valve (25) is switched to the second state, the refrigerant compressed by the compressor (21) passes through the four-way switching valve (25) and enters the second adsorption heat exchanger (24). Inflow. The refrigerant flowing into the second adsorption heat exchanger (24) dissipates heat to the adsorbent and the passing air and condenses. The refrigerant radiated and condensed by the second adsorption heat exchanger (24) is decompressed by the expansion valve (23) and then flows into the first adsorption heat exchanger (22). The refrigerant flowing into the first adsorption heat exchanger (22) absorbs heat from the adsorbent and the passing air and evaporates. The refrigerant that has absorbed heat and evaporated in the first adsorption heat exchanger (22) is sucked into the compressor (21) and compressed.

  Further, the operating frequency of the compressor (21) is controlled by the controller (50) so that the humidity of the air that has passed through the adsorption heat exchanger (22, 24) functioning as an evaporator becomes a desired humidity. . Specifically, the temperature T (° C.) and the relative humidity RH (% RH) of the air that has passed through the humidity adjusting member (31) are detected by the second temperature sensor (62) and the humidity sensor (63). The value is input to the controller (50). The controller (50) calculates the absolute humidity X (g / kg (DA)) based on the temperature T of the air that has passed through the humidity adjusting member (31) and the relative humidity RH. Then, the controller (50) controls the operating frequency of the compressor (21) so that the calculated absolute humidity X is equal to or lower than the desired humidity. That is, when the absolute humidity X is higher than the desired humidity, the operating frequency of the compressor (21) is increased. On the other hand, when the absolute humidity X is equal to or lower than the desired humidity, the compressor (21) Maintain the operating frequency. Thereby, the air below the desired absolute humidity is supplied to the dry room (S).

  In normal operation, the controller (50) switches the first and second flow path switching sections (26, 27) in accordance with the switching of the four-way switching valve (25) of the refrigerant circuit (20a), and every predetermined time. The first operation and the second operation are performed alternately (for example, at intervals of 5 minutes).

  As shown in FIG. 1, in the first operation, the four-way switching valve (25) of the refrigerant circuit (20a) is switched to the first state, and the first and second flow path switching sections provided in the casing (20b). (26, 27) is in the first distribution state. As a result, the second adsorption heat exchanger (24) functions as an evaporator to dehumidify the supply air, and at the same time, the first adsorption heat exchanger (22) functions as a condenser to regenerate the adsorbent. On the other hand, as shown in FIG. 2, in the second operation, the four-way switching valve (25) of the refrigerant circuit (20a) is switched to the second state, and the first and second flow paths provided in the casing (20b). A switching part (26, 27) will be in a 2nd distribution state. As a result, the first adsorption heat exchanger (22) functions as an evaporator to dehumidify the supply air, and at the same time, the second adsorption heat exchanger (24) functions as a condenser to regenerate the adsorbent. It becomes a heat exchanger. Hereinafter, the operation in each air passage will be described in detail along the air flow.

  When the air supply fan (28) and the exhaust fan (29) are driven, the air (RA at a low dew point (for example, dew point −30 ° C.) in the constant temperature and humidity space (S1) generated by the dehumidifier (80). ) Flows into the inflow passage (70a). The air flowing through the inflow passage (70a) is divided into the first branch passage (70b) and the second branch passage (70c).

  The air that has flowed into the first branch passage (70b) flows into the dehumidifying unit (20), and during the first operation, the second adsorption heat exchanger that functions as an evaporator by the first flow path switching unit (26). It is led to the storage chamber (24) (see FIG. 1). In the air passing through the second adsorption heat exchanger (24) in the storage chamber, moisture in the air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. In this way, the air passing through the second adsorption heat exchanger (24) is dehumidified. On the other hand, during the second operation, the air flowing into the dehumidifying unit (20) is guided to the accommodation chamber of the first adsorption heat exchanger (22) functioning as an evaporator by the first flow path switching unit (26). When passing through the first adsorption heat exchanger (22), it is cooled and dehumidified (see FIG. 2).

  The adsorption heat generated when the moisture in the air in the air supply passage (11) is adsorbed by the adsorbent of each adsorption heat exchanger (22, 24) is the refrigerant flowing through each adsorption heat exchanger (22, 24). Given to. Further, since the air flowing through the air supply passage (11) is cooled by the refrigerant, the air is dehumidified to lower the humidity and is cooled to lower the temperature.

  The air dehumidified by the dehumidifying unit (20) flows through the air supply passage (11), and after the temperature is adjusted by the heater (30), the air is passed through the multiple air flow paths (32a) of the humidity adjusting member (31). pass. The heating amount of the heater (30) is controlled by the controller (50) so that the temperature of the air that has passed through the humidity adjusting member (31) detected by the second temperature sensor (62) becomes a desired temperature. .

  Here, immediately after switching between the first operation and the second operation, the temperature of the adsorption heat exchanger (22, 24) immediately after switching from the condenser to the evaporator is high, so that the adsorption heat is hardly absorbed. Therefore, moisture to be removed by the adsorption heat exchanger (22, 24) functioning as an evaporator in the dehumidification unit (20) flows out from the adsorption heat exchanger (22, 24) in a state of insufficient dehumidification remaining in the air. In such a case, when the moisture remaining in the air passes through the multiple air flow paths (32a) of the humidity adjusting member (31), it is provided on the inner wall surface of the multiple air flow paths (32a). It is adsorbed by the adsorbent and removed from the air. That is, the state of insufficient dehumidification is eliminated.

  On the other hand, when a certain amount of time has elapsed since the operation switching between the first operation and the second operation, the temperature of the adsorption heat exchanger (22, 24) functioning as an evaporator decreases to the desired temperature, so that the adsorption is performed immediately after the switching. Heat is easily absorbed. For this reason, in the adsorption heat exchanger (22, 24) functioning as an evaporator, air flows out of the adsorption heat exchanger (22, 24) in a state where most of the moisture contained in the air is adsorbed by the adsorbent. It flows into the adjustment member (31). In such a case, the moisture adsorbed by the adsorbent of the humidity adjusting member (31) is released into the passing air. Thereby, the humidity adjusting member (31) is regenerated.

  The air that has passed through the humidity adjusting member (31) and has been adjusted to a desired temperature and humidity is supplied to the dry room (S) as an air supply (SA). On the other hand, a part of the air in the dry room (S) is discharged to the outside through the exhaust passage (82). Thus, in this Embodiment 1, the air of the low dew point (for example, dew point -30 degreeC) in the constant temperature and humidity room (S1) produced | generated by the dehumidification apparatus (80) is taken in into a dehumidification system (10). By further dehumidifying, air having a dew point temperature (for example, dew point −50 ° C.) lower than the dew point temperature of the constant temperature and humidity space (S1) is supplied to the dry room (S). As a result, the air in the dry room (S) is kept at a dew point temperature (for example, dew point −50 ° C.) lower than the dew point temperature of the constant temperature and humidity space (S1).

  On the other hand, the air that has flowed into the second branch passage (70c) flows into the dehumidifying unit (20), and during the first operation, the first adsorption heat that functions as a condenser by the first flow path switching unit (26). It is led to the storage chamber of the exchanger (22) (see FIG. 1). The air passing through the first adsorption heat exchanger (22) in the storage chamber is heated by exchanging heat with the high-temperature and high-pressure refrigerant in the refrigerant circuit (20a) when passing, and the first adsorption heat exchanger (22). Regenerate the adsorbent. On the other hand, during the second operation, the air flowing into the dehumidifying unit (20) is guided to the accommodation chamber of the second adsorption heat exchanger (24) functioning as a condenser by the first flow path switching unit (26). When passing through the second adsorption heat exchanger (24), it is heated by exchanging heat with the high-temperature and high-pressure refrigerant in the refrigerant circuit (20a) to regenerate the adsorbent in the second adsorption heat exchanger (24) ( (See FIG. 2).

  The air which regenerated | regenerated the adsorbent of the adsorption heat exchanger (22,24) which functions as a condenser in a dehumidification unit (20) is discharged | emitted outside as exhaust_gas | exhaustion (EA).

<Dry operation>
By the way, while the normal operation is stopped, the air in the dry room (S) whose humidity is not adjusted reaches the humidity adjusting member (31) through the air supply passage (11), and the humidity adjusting member (31) is adsorbed. There is a risk that a large amount of moisture is adsorbed to the agent. If a large amount of moisture is adsorbed on the adsorbent of the humidity adjustment member (31) before the start of normal operation, the air dehumidified by the dehumidifying unit (20) is converted into Since a large amount of adsorbed water is released, it becomes impossible to generate air having a desired low dew point. Therefore, in the present dehumidifying system (10), the controller (50) performs the drying operation after the start-up and before the start of the normal operation.

  As shown in FIG. 3, in the drying operation, the first damper (13) is controlled to be closed, while the second damper (14) is controlled to be opened. Further, the air supply fan (28) and the exhaust fan (29) of the dehumidifying unit (20) are driven with a predetermined air volume. Thereby, air flows through each of the air supply passage (11) and the regeneration air passage (12). In the refrigerant circuit (20a), the compressor (21) is operated, the expansion valve (23) is controlled to a predetermined opening degree, and the four-way switching valve (25) is alternately switched between the first state and the second state. It is done. Furthermore, with the switching of the four-way switching valve (25) of the refrigerant circuit (20a), the first and second flow path switching units (26, 27) are switched, and the first operation and the second operation are performed every predetermined time. And are performed alternately. In the drying operation, the compressor (21) and the heater (30) of the dehumidifying unit (20) are operated at the rated output, and the humidity adjusting member (31) is executed until a predetermined dry state is achieved.

  Specifically, the air in the first branch passage (70b) of the air supply passage (11) dehumidified in the dehumidification unit (20) is heated in the heater (30). At this time, since the heater (30) is operated at a higher rated output than during normal operation, the temperature of the air that has passed through the heater (30) is higher than that during normal operation (for example, 20 ° C.). The temperature becomes high (for example, 80 ° C.). Thus, when the high temperature air passes through the multiple air flow paths (32a) of the humidity adjusting member (31), the adsorbent provided on the inner wall surface of the air flow path (32a) is heated and adsorbed. The moisture in the agent is released into the air and the adsorbent is regenerated.

  The air used for regeneration of the adsorbent of the humidity adjusting member (31) flows into the regeneration air passage (12) via the second communication passage (17) without being supplied to the dry room (S), In the dehumidifying unit (20), the air is discharged out of the room together with the air used to regenerate the adsorbent of the adsorption heat exchanger (22, 24). That is, in Embodiment 1, the humidity adjusting member (31) of the air supply passage (11) is formed by the second communication passage (17) and the downstream portion of the dehumidifying unit (20) of the regeneration air passage (12). And an exhaust passage connected to the dry room (S) for exhausting air.

  The controller (50) adjusts the temperature T (° C.) and the relative humidity RH (% RH) of the air that has passed through the humidity adjusting member (31) detected by the second temperature sensor (62) and the humidity sensor (63). Based on this, the dew point temperature DP (° C.) is calculated. Then, when the calculated dew point temperature DP is equal to or lower than the desired dew point temperature, the controller (50) ends the drying operation, assuming that the humidity adjusting member (31) is in a predetermined dry state.

  Thus, after starting, before performing normal operation, the heater (30) performs a drying operation in which the air flowing into the humidity adjusting member (31) is heated, and before the normal operation, the humidity adjusting member ( By drying 31), dehumidification by the humidity adjusting member (31) becomes possible.

  In the first embodiment, during the drying operation, air having a low dew point is supplied from the dehumidifier (80) to the constant temperature and constant humidity space (S1). Thus, in Embodiment 1, even if the air in the constant temperature and humidity space (S1) that has flowed into the air supply passage (11) is discharged to the outside after the regeneration of the humidity adjusting member (31), the constant temperature and humidity space ( S1) is configured not to be in a negative pressure state where the pressure is lower than the outdoor. Further, the damper (83) of the exhaust passage (82) is controlled to be closed during the drying operation. In other words, during the drying operation, air is not supplied from the dehumidification system (10) to the dry room (S), but is not exhausted, so that the negative pressure state is not lower than the constant temperature and humidity space (S1). .

  Further, in the first embodiment, when the normal operation is stopped, the controller (50) controls the second damper (14) to the closed state and is an open / close type that constitutes the second flow path switching unit (27). A plurality of dampers are controlled to be closed. As a result, the air in the constant temperature and humidity space (S1) and the dry room (S) and the outdoor air that are not humidity-adjusted flow into the humidity adjusting member (31) through the air supply passage (11) and the exhaust passage. Adsorption of a large amount of moisture on the adsorbent of the humidity adjusting member (31) due to is suppressed.

  In the first embodiment, the dehumidifying unit (20) may not include the first flow path switching unit (26) but may include only the second flow path switching unit (27).

<Humidity fluctuation of the air flowing through the humidity adjustment member>
In the present embodiment, when the honeycomb structure (32) that is the humidity adjusting member (31) is provided in the air supply passage (11), the honeycomb structure (32) is not provided in the air supply passage (11). As compared with the above, the humidity fluctuation of the air supplied from the air supply passage (11) to the dry room (S) is reduced. Specifically, when the honeycomb structure (32) is not provided, one of the two adsorption heat exchangers (22, 24) of the dehumidifying unit (20) is switched from the regeneration-side condenser to the adsorption-side evaporator. As shown by the broken line in the graph of FIG. 5, immediately after switching, the humidity of the outlet air of the dehumidifying unit (20) rapidly increases and then cooled by the refrigerant to decrease the humidity. Thereafter, the humidity decreases with time. Will gradually decrease. Such humidity fluctuation occurs every time the adsorption side and the regeneration side are switched.

  On the other hand, when the honeycomb structure (32) is provided in the air supply passage (11), as shown by the solid line in the graph of FIG. 5, the humidity fluctuation when switching from the regeneration side condenser to the adsorption side evaporator is small. Become. This point will be described with reference to FIG. FIG. 6A shows the downstream surface of the honeycomb structure (32) arranged in the duct of the air supply passage (11) as a three-stepped surface for convenience instead of the inclined surface. FIG. In FIG. 6A, a region where the honeycomb structure (32) is not provided is defined as (a), and a region where the honeycomb structure (32) is thinnest is a region where air flows. (B), (c) is a region where air flows through a portion where the thickness of the honeycomb structure (32) is intermediate, and air flows through a portion where the thickness of the honeycomb structure (32) is the thickest. Let the area be (d). Graphs other than the solid line shown in (a) to (d) of FIG. 6 (B) show humidity fluctuations in the regions corresponding to (a) to (d) of FIG. 6 (A), respectively.

  As shown in FIG. 6 (B), when the thickness of the portion through which the air passes through the honeycomb structure (32) increases from (a) to (d), the point when the regeneration side is switched to the adsorption side. Therefore, the peak of humidity fluctuation appears later, and the peak of humidity fluctuation becomes smaller. When these graphs (a) to (d) are averaged, it can be seen that the humidity fluctuation after switching to the adsorption side becomes small as shown by the solid line in FIG. Further, when the width of the staircase portion of the honeycomb structure is further reduced to approach the inclined surface, the humidity fluctuation approaches the movement along the solid line graph of FIG. Compared with the case of providing, the fluctuation range becomes smaller and the fluctuation becomes smoother.

  Further, in the present embodiment, as shown in FIG. 4, the humidity adjusting member (31) and the pressure loss adjusting portion (33) are made into a cube or a rectangular parallelepiped by combining the honeycomb structure (32) and the second honeycomb structure (34). Therefore, it is possible to suppress variations in pressure loss caused in the honeycomb structure (32) having a plurality of air flow paths (32a) having different lengths.

  In the present embodiment, since the second honeycomb structure (34) is provided on the upstream side of the honeycomb structure (32), the temperature change of the air is absorbed by the second honeycomb structure (34). Therefore, the effect of reducing humidity fluctuations by the honeycomb structure (32) is further enhanced.

-Effect of Embodiment 1-
Immediately after switching the refrigerant circulation direction in the refrigerant circuit (20a), the temperature of the adsorption heat exchanger (22, 24) functioning as an evaporator is high, so the dehumidification capacity is low and the air flows out in a state of insufficient dehumidification. In some cases, according to this embodiment, the adsorbent of the honeycomb structure (32), which is the humidity adjusting member (31) provided on the downstream side, adsorbs the remaining moisture, thereby eliminating the state of insufficient dehumidification. can do. Therefore, even immediately after switching of the circulation direction of the refrigerant in the refrigerant circuit (20a), air in a sufficiently dehumidified state can be supplied to the dry room (S).

  In addition, when a certain amount of time has elapsed since switching of the circulation direction of the refrigerant in the refrigerant circuit (20a), the temperature of the adsorption heat exchanger (22, 24) functioning as an evaporator is lowered and the dehumidifying capacity is increased. As a result, most of the moisture contained in the air flows out of the adsorption heat exchanger (22, 24) while being adsorbed by the adsorbent, so that the adsorbent of the honeycomb structure (32) provided on the downstream side The adsorbed moisture is released into the passing air. As a result, the honeycomb structure (32) can be regenerated.

  Further, since the thickness of the honeycomb structure (32) provided in the air supply passage (11) is changed, the honeycomb structure (32) is more than the case where the honeycomb structure (32) has a uniform thickness. The humidity fluctuation of the air that flows out from (32) can be suppressed. Therefore, fluctuations in the humidity of the dry room (S) can also be reduced.

  Further, since the honeycomb structure (32) and the second honeycomb structure (34) are combined so as to form a cubic or rectangular parallelepiped block, the length of the air flow path (32a, 34a) is long. And the variation in pressure loss can be suppressed.

  Further, the second honeycomb structure (34) not supporting the adsorbent is disposed on the upstream side of the honeycomb structure (32) supporting the adsorbent, and air is passed through the second honeycomb structure (34). Therefore, the honeycomb structure (32) can enhance the effect of suppressing humidity fluctuations.

  As described above, according to the present embodiment, in the dehumidifying unit (20), the refrigerant circulation direction in the refrigerant circuit (20a) is alternately switched, so that immediately after switching and after a certain amount of time has elapsed since switching. Where the dehumidifying capacity of the dehumidifying unit (20) varies greatly, according to the present embodiment, the fluctuation range of the dehumidifying capacity can be reduced. That is, the fluctuation range of the dew point temperature of the supply air to the dry room (S) generated by switching the refrigerant circulation direction in the refrigerant circuit (20a) of the dehumidifying unit (20) can be reduced. Therefore, according to the said dehumidification system, the inside of a dry room (S) can always be kept at a low dew point.

-Modification of Embodiment 1-
In the above embodiment, the second honeycomb structure (34) is arranged on the upstream side of the honeycomb structure (32). However, the upstream / downstream relationship may be reversed. Even if it does in this way, compared with the case where the honeycomb structure with a uniform thickness is provided, it is possible to suppress the fluctuation in humidity and also suppress the variation in pressure loss.

<< Embodiment 2 of the Invention >>
A second embodiment of the present invention will be described.

  In the second embodiment, as shown in FIG. 7, the upstream end surface (may be the downstream end surface) of the honeycomb structure (35) in the air flow direction is formed by a stepped surface (35b). This is an example using a humidity adjusting member (31). In the honeycomb structure (35) of the second embodiment, the thickness in the air flow direction changes stepwise at a plurality of portions. In this honeycomb structure (35), an adsorbent is supported on a plurality (large number) of air flow paths (35a).

  The pressure loss adjusting portion (31) includes a pressure loss adjusting plate (a plurality of openings (36a, 36b, 36c) through which air passes are formed at positions corresponding to a plurality of portions of the honeycomb structure (35)). 36). The opening (36a, 36b, 36c) of the pressure loss adjusting plate (36) has a larger opening area as the thickness of the honeycomb structure (35) in the air flow direction is larger, and a smaller area as the thinner portion. The plurality of air flow paths (35a) of the honeycomb structure (35) are partitioned for each opening (36a, 36b, 36c) of the pressure loss adjusting plate (36).

  If comprised in this way, the dispersion | variation in a pressure loss will be suppressed by the pressure loss adjustment board (36) which is a pressure loss adjustment part (33). When the pressure loss adjusting plate (36) is not provided, air tends to flow in a portion where the air easily flows (portion where the thickness of the honeycomb structure (35) is thin), and the air volume in the portion increases. Although the air volume at the thick part 35) is reduced, the air volume flowing through the honeycomb structure (35) is made uniform by providing the pressure loss adjusting plate (36).

  Moreover, since the step-like honeycomb structure (35) is used as the humidity adjusting member (31), the humidity fluctuation of the downstream air can be suppressed as in the first embodiment. Therefore, fluctuations in the humidity of the dry room (S) can also be suppressed.

-Modification of Embodiment 2-
In the modification of the second embodiment, as shown in FIGS. 8A and 8B, the honeycomb structure (37) having a large number of air flow paths (37a) is stepped on the upstream end face in the air flow direction. On the other hand, the plate-like pressure loss adjusting portion is not used. In the honeycomb structure (37), the thinner the thickness in the air flow direction, the smaller the air flow area (37c), and the thicker the portion, the larger the air flow area (37c). The honeycomb structure (37) shown in FIG. 8A is formed by combining (bonding) three honeycomb structures having different thicknesses and air flow areas.

  The white arrow in FIG. 8B represents the flow rate per unit area of the air flowing through each part of the honeycomb structure (37) having different thicknesses, and the thinner the unit, the more the unit is indicated. The flow rate per area is large. On the other hand, in this honeycomb structure (37), the thinner the portion in the air flow direction, the smaller the air circulation area, and the thicker the portion, the larger the air circulation area. The flowing air volume is almost uniform. As described above, in the modification of the second embodiment, the pressure loss adjusting section (33) is configured by changing the air flow area according to the thickness of each section of the honeycomb structure (37). As a result, variations in the air volume at each part can be suppressed.

  And by making the honeycomb structure (37) into a stepped shape, it is possible to suppress the humidity fluctuation of the downstream air as in the first embodiment, and to suppress the fluctuation of the humidity of the dry room. .

<< Other Embodiments >>
About the said embodiment, it is good also as the following structures.

  For example, the humidity adjusting member and the pressure loss adjusting unit may be configured as in the other embodiment 1 shown in FIG. In the example shown in FIG. 9, the humidity adjusting member (31) is configured by filling the first air-permeable box (39a) with the first granular material (38a) carrying the adsorbent. Further, the pressure loss adjusting section (33) has a second ventilation that is formed in a rectangular parallelepiped shape or a cubic shape by combining the second granular material (38b) not supporting the adsorbent with the first breathable box (39a). It is comprised by filling in the sex box (39b). The gap between the first grain material (38a) in the first breathable box (39a) and the gap between the second grain material (38b) in the second breathable box (39b) are air flow paths. It has become.

  Even if comprised in this way, combining the 1st air permeability box (39a) with which the 1st granule (38a) was filled, and the 2nd air permeability box (39b) with which the 2nd granule material (38b) was filled. Thus, variation in air humidity can be suppressed by the first granule (38a) in the first air permeable box (39a), while suppressing variation in pressure loss and making the air flow flowing through the humidity adjusting member (31) uniform. Therefore, the dew point temperature of the air in the dry room (S) can always be kept below the target value.

  Further, the humidity adjusting member (31) and the pressure loss adjusting unit (33) are, as in the other embodiment 2 shown in FIG. 10, a plurality of fins (40a) arranged in parallel with the line segment in the air flow direction. ) And an adsorbent (40b) supported by these fins (40a). In this adsorption fin structure (40), the length in the air flow direction of the portion where the adsorbent layer (40b) is formed on each fin (40a) is different for each fin (40a). In this configuration, since the adsorbent layer (40b) is thin, there is almost no variation in pressure loss if the fins (40a) are arranged at almost equal intervals. Therefore, in this example, the adsorbent fin structure (40) has the humidity adjusting member (31) and the pressure loss adjusting unit (33) only by changing the length of the adsorbent applied to each fin (40a) in the air flow direction. It will have both functions.

  Even with this configuration, when air passes through the suction fin structure (40), it is possible to suppress variations in pressure loss and to suppress fluctuations in the humidity of the air supplied to the dry room (S). The dew point temperature of indoor air can always be kept below the target value.

  In the first embodiment, the honeycomb structure (32) and the second honeycomb structure (34) are used in combination. However, the second honeycomb structure (34) is a member that adjusts variation in pressure loss. For example, the pressure loss adjusting plate (36) of Embodiment 2 may be used instead of the second honeycomb structure (34), or other configurations may be adopted.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or its use.

  As described above, the present invention is useful for a dehumidification system that dehumidifies the inside of a dry room using a dehumidification unit having an adsorption heat exchanger having an adsorbent on the surface.

10 Dehumidification system
11 Air supply passage
20 Dehumidifying unit
22 First adsorption heat exchanger
24 Second adsorption heat exchanger
31 Humidity adjustment member
32 Honeycomb structure
32a Air flow path
32b inclined surface
33 Pressure loss adjustment section
34 Second honeycomb structure
36 Pressure loss adjustment plate
36a opening
36b opening
36c opening
38a 1st grain material
38b 2nd grain material
39a First breathable box
39b Second breathable box
40 Adsorption fin structure
40a fin
40b Adsorbent layer

Claims (9)

A dehumidification unit (20) comprising a first adsorption heat exchanger (22) and a second adsorption heat exchanger (24) which are provided with an adsorbent on the surface and alternately switch between an adsorption side and a regeneration side;
The air dehumidified by the adsorption heat exchanger (22, 24) on the adsorption side of the first adsorption heat exchanger (22) and the second adsorption heat exchanger (24) of the dehumidifying unit (20) Air supply passage (11) to be introduced into the dehumidified space (S),
A dehumidifying system for a dry room comprising
An adsorbent is provided in the plurality of air flow paths (32a) that are arranged in the air supply path (11) and through which the air flowing through the air supply path (11) passes, and the plurality of air flow paths (32a) Humidity adjustment members (31) with different channel lengths;
A pressure loss adjusting section (33) for suppressing variations in pressure loss due to the plurality of air flow paths (32a) having different lengths provided in the humidity adjusting member (31);
A dehumidification system for a dry room characterized by comprising: In claim 1,
The humidity adjusting member (31) is constituted by a honeycomb structure (32) in which an adsorbent is supported on an air flow path (32a), and at least one of an upstream end face and a downstream end face in the air flow direction is provided. A dehumidification system for a dry room, which is formed by an inclined surface (32b) inclined with respect to the air flow direction. In claim 2,
The pressure loss adjusting part (33) is constituted by a second honeycomb structure (34) in which an adsorbent is not supported on the air flow path (32a),
The humidity adjusting member (31) and the pressure loss adjusting portion (33) are configured to have a rectangular parallelepiped or cubic block shape by combining the honeycomb structure (32) and the second honeycomb structure (34). A dehumidifying system for dry rooms. In claim 3,
A dehumidification system for a dry room, wherein the second honeycomb structure (34) is disposed upstream of the honeycomb structure (32) in the air flow direction. In claim 1,
The humidity adjusting member (31) is constituted by a honeycomb structure (35) in which an adsorbent is supported on an air flow path (35a), and the honeycomb structure (35) is an end face on the upstream side in the air flow direction. And at least one of the end faces on the downstream side is formed by a stepped surface (35b), so that the thickness in the air flow direction changes stepwise in a plurality of portions. Dehumidification system. In claim 5,
The pressure loss adjusting portion (33) includes a pressure loss adjusting plate (36) in which a plurality of openings (36a, 36b, 36c) through which air passes are formed at positions corresponding to a plurality of portions of the honeycomb structure (35). The opening (36a, 36b, 36c) of the pressure loss adjusting plate (36) has a smaller opening area as the thickness of the honeycomb structure (35) in the air flow direction is smaller, and as the thicker portion the opening (36a, 36b, 36c) A dehumidifying system for a dry room characterized by a large opening area. In claim 5,
The pressure loss adjusting part (33) is configured by reducing the air flow area as the thickness of the honeycomb structure (35) in the air flow direction decreases and increasing the air flow area as the thickness increases. A dehumidification system for dry rooms. In claim 1,
The humidity adjusting member (31) is configured by filling the first breathable box (39a) with the first granular material (38a) carrying the adsorbent,
The pressure loss adjusting part (33) is a second air permeable box that is formed into a rectangular parallelepiped shape or a cubic shape by combining the second granular material (38b) not carrying the adsorbent with the first air permeable box (39a). (39b) A dehumidification system for a dry room, characterized by being filled in. In claim 1,
The humidity adjusting member (31) and the pressure loss adjusting unit (33) include a plurality of fins (40a) arranged in parallel to a line segment in the air flow direction, and an adsorption carried on these fins (40a). The adsorbent fin structure (40) having the adsorbent layer (40b), and the length of the air flow direction of the portion where the adsorbent layer (40b) is supported on the fin (40a) is a plurality of fins (40a). A dehumidification system for dry rooms characterized by being different.

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