Dehumidifier

Abstract

To inhibit reduction of a dehumidification amount.SOLUTION: A dehumidifier (20) includes: a rotary adsorption rotor (22) having a support member (63) extending in a radial direction; and a casing (21) in which an internal space (S) is formed. The internal space (S) includes: a processing space (S2) in which moisture in air is adsorbed into the adsorption rotor (22); and a reproduction space (S3) in which moisture desorbed from the adsorption rotor (22) is provided to air. In the casing (21), an inflow port (83) which is open in the processing space (S2), a first outflow port (84), and a second outflow port (85) are formed. In a rotation direction of the adsorption rotor (22), the second outflow port (85) and the first outflow port (84) are sequentially arranged.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a dehumidifier. [Background technology]

[0002] The dehumidifier of Patent Document 1 includes a rotary adsorption rotor capable of adsorbing and desorbing moisture. In the dehumidifier of Patent Document 1, a pre-treatment zone, a regeneration zone, a purge zone, and a main treatment zone are arranged in this order along the rotation path of the adsorption rotor in the rotor rotation direction. In the pre-treatment zone, air is passed through the adsorbent layer of the adsorption rotor to pre-dehumidify the air. In the regeneration zone, high-temperature gas for regeneration is passed through the adsorbent layer of the adsorption rotor to regenerate the adsorbent layer. In the purge zone, purge gas is passed through the adsorbent layer of the adsorption rotor to purge the adsorbent layer. In the main treatment zone, air that has passed through the pre-treatment zone is passed through the adsorbent layer of the adsorption rotor to dehumidify the pre-dehumidified air. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-144831 Summary of the Invention [Problem to be solved by the invention]

[0004] In a dehumidification device such as that described in Patent Document 1, the regeneration zone and purge zone have smaller areas than the pretreatment zone and main treatment zone. Here, the adsorption rotor is provided with a support member that crosses the adsorbent layer in the radial direction. Unlike the adsorbent layer, the support member does not allow air to pass through. Therefore, when the support member passes through the regeneration zone or purge zone as the adsorption rotor rotates, the air volume passing through the regeneration zone decreases. A decrease in the air volume passing through the regeneration zone reduces the amount of adsorbent regenerated. In this state, if the adsorption rotor rotates and adsorbent with insufficient moisture content enters the main treatment zone, the dehumidification capacity of the adsorption rotor decreases.

[0005] An object of the present disclosure is to suppress a decrease in the dehumidification amount. [Means for solving the problem]

[0006] The first aspect relates to a dehumidifier that supplies dehumidified air to a target space (11). The dehumidifier includes a rotary adsorption rotor (22) having a radially extending support member (63) that can adsorb and desorb moisture, and a casing (21) that houses the adsorption rotor (22) and defines an internal space (S) through which air flows. The internal space (S) includes a treatment space (S2) in which moisture in the air is adsorbed by the adsorption rotor (22) and a regeneration space (S3) in which moisture desorbed from the adsorption rotor (22) is added to the air. The casing (21) is formed with an inlet (83), a first outlet (84), and a second outlet (85) that open to the treatment space (S2). Air flowing out from the first outlet (84) is supplied to the target space (11), and air flowing out from the second outlet (85) is supplied to the regeneration space (S3). The second outlet (85) and the first outlet (84) are arranged in this order in the rotation direction of the adsorption rotor (22).

[0007] In the first aspect, the second outlet (85) and the first outlet (84) are arranged in this order in the rotation direction of the adsorption rotor (22). Therefore, when the adsorption rotor (22) rotates, the adsorption rotor (22) passes through the second outlet (85) in the treatment space (S2) and then enters the first outlet (84). Therefore, when the adsorption rotor (22) passes through the regeneration space (S3) and then enters the treatment space (S2), the humid air remaining in the adsorption rotor (22) is pushed out and supplied to the regeneration space (S3) through the second outlet (85). In the first aspect, the regeneration airflow rate decreases only when the support member (63) of the adsorption rotor (22) passes through the regeneration space (S3) during one rotation of the adsorption rotor (22). Therefore, compared to a case where the dehumidification device has a purge space, the regeneration rate of the adsorption rotor (22) can be reduced, thereby reducing the dehumidification rate.

[0008] In the second aspect, in the first aspect, the internal space (S) further includes a pre-treatment space (S1) in which moisture in the air is adsorbed by the adsorption rotor (22). The air flowing out of the pre-treatment space (S1) is supplied to the treatment space (S2) through the inlet (83).

[0009] In the second embodiment, the air is dehumidified twice by passing through the pre-treatment space (S1) and the treatment space (S2), thereby producing air with a lower dew point.

[0010] In a third aspect, in the first or second aspect, the casing (21) has a guide portion (93) provided so as to surround the entire periphery of the second outlet (85).

[0011] In the third aspect, the guide portion (93) is provided to surround the entire periphery of the second outlet (85), and therefore, the air around the second outlet (85) flows along the guide portion (93) and tends to gather at the second outlet (85). This ensures a sufficient amount of air to be supplied to the regeneration space (S3). [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram of a dehumidification system according to an embodiment. [Figure 2] FIG. 2 is a refrigerant circuit diagram of a refrigeration device provided in the dehumidification system. [Figure 3] FIG. 3 is a side view of the adsorption rotor. [Figure 4] FIG. 4 is a front cross-sectional view of the adsorption rotor housed in the casing. [Figure 5] FIG. 5 is a cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 6 is an enlarged view showing the vicinity of the adsorption rotor in FIG. [Figure 7] FIG. 7 is a side view of the right side of the casing. [Figure 8] FIG. 8 is a cross-sectional view corresponding to FIG. 5, showing a dehumidifying device of a comparative example. [Figure 9]FIG. 9 is a cross-sectional view corresponding to FIG. 5, showing a dehumidifying device of a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below, and various modifications are possible within the scope of the technical concept of the present disclosure. Since the drawings are intended to conceptually explain the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary to facilitate understanding.

[0014] (1) Dehumidification system The dehumidification system (10) of this embodiment is for dehumidifying a target space (11) by supplying low dew point air. As shown in Fig. 1, the dehumidification system (10) dehumidifies outdoor air (OA) and supplies the dehumidified air as supply air (SA) to the target space (11). The target space (11) to be dehumidified is, for example, a dry clean area of ​​a production line for lithium ion batteries or all-solid-state batteries, which requires low dew point air.

[0015] The target space (11) is provided with an air supply port (12), a return air port (13), and an exhaust port (14). The air supply port (12) is for supplying supply air (SA) to the target space (11). The return air port (13) is for returning air (room air (RA)) from the target space (11) to the dehumidification system (10). The exhaust port (14) is for exhausting the room air (RA) to an outdoor space.

[0016] The dehumidification system (10) constitutes part of a lithium-ion battery production line. As shown in Figures 1 and 2, the dehumidification system (10) includes a dehumidifier (20) and a refrigeration device (30).

[0017] (2)Dehumidifier The dehumidifier (20) is a device that supplies dehumidified air to a target space (11). As shown in Fig. 1, the dehumidifier (20) includes one (more specifically, only one) adsorption rotor (22), a casing (21), a first air passage (23), a second air passage (24), a third air passage (25), a fourth air passage (26), a fifth air passage (27), and a return air passage (28).

[0018] The adsorption rotor (22) is a rotary adsorption rotor capable of adsorbing and desorbing moisture. The adsorption rotor (22) is formed in a substantially disk shape. The adsorption rotor (22) is driven to rotate by a motor (29). Details of the adsorption rotor (22) will be described later.

[0019] The casing (21) is formed in a generally rectangular box shape. An internal space (S) is formed in the casing (21). The internal space (S) accommodates an adsorption rotor (22) and a motor (29). First to fifth air passages (23-27) are connected to the casing (21), and air flows through the internal space (S). The internal space (S) includes a pre-treatment space (S1), a treatment space (S2), a regeneration space (S3), and a casing space (S4). Details of each space will be described later.

[0020] The first air passage (23) has an inflow end communicating with the outdoor space and an outflow end communicating with the pre-treatment space (S1) in the casing (21). A filter (51), a first fan (52), and a first cooler (44) are arranged in the first air passage (23). The filter (51) is arranged upstream of the first fan (52) and the first cooler (44). The filter (51) captures dust contained in the outdoor air (OA) flowing in from the outdoor space. The first fan (52) is arranged upstream of the first cooler (44). The first fan (52) generates an air flow in the first air passage (23). The first cooler (44) lowers the temperature of the air in the first air passage (23). The first cooler (44) will be described in detail below.

[0021] The second air passage (24) has an inlet end communicating with the pre-treatment space (S1) in the casing (21) and an outlet end communicating with the treatment space (S2) in the casing (21). A second fan (53) and a second cooler (45) are disposed in the second air passage (24). The second fan (53) is disposed upstream of the second cooler (45). The second fan (53) generates an air flow in the second air passage (24). The second cooler (45) lowers the temperature of the air in the second air passage (24). The second cooler (45) will be described in detail below.

[0022] The third air passage (25) has an inlet end communicating with the treatment space (S2) in the casing (21) and an outlet end communicating with the target space (11) through the air inlet (12). A first heater (35) is disposed in the third air passage (25). The first heater (35) increases the temperature of the air in the third air passage (25). The first heater (35) will be described in detail later.

[0023] The fourth air passage (26) has an inlet end communicating with the treatment space (S2) in the casing (21) and an outlet end communicating with the regeneration space (S3) in the casing (21). A second heater (36) is disposed in the fourth air passage (26). The second heater (36) increases the temperature of the air in the fourth air passage (26). The second heater (36) will be described in detail later.

[0024] The fifth air passage (27) has an inflow end communicating with the regeneration space (S3) in the casing (21) and an outflow end communicating with the outdoor space. A third fan (54) is disposed in the fifth air passage (27). The third fan (54) generates air flows in the fourth air passage (26) and the fifth air passage (27).

[0025] The return air passage (28) has an inflow end communicating with the target space (11) through the return air port (13), and an outflow end communicating with the second air passage (24) upstream of the second fan (53).

[0026] (3) Refrigeration equipment 2, the refrigeration system (30) includes a refrigerant circuit (31). The refrigerant circuit (31) includes a compressor (32), an intercooler (33), an oil separator (34), first and second heaters (35, 36), a gas cooler (37), an intercooler (38), first and second expansion valves (41, 42), and first and second coolers (44, 45). These components are connected to each other by refrigerant piping.

[0027] The compressor (32) is a two-stage compression rotary compressor that compresses sucked low-pressure gas refrigerant and discharges intermediate-pressure gas refrigerant, and also compresses sucked intermediate-pressure gas refrigerant and discharges high-pressure gas refrigerant.

[0028] The intercooler (33) cools the intermediate-pressure gas refrigerant discharged from the compressor (32) by heat exchange with outdoor air transported by a fan (not shown). The intermediate-pressure gas refrigerant flowing out of the intercooler (33) is sent to the compressor (32).

[0029] The oil separator (34) separates refrigeration oil from the high-pressure gas refrigerant discharged from the compressor (32). The refrigeration oil separated in the oil separator (34) is returned to the compressor (32) through the oil return pipe (31a). The high-pressure gas refrigerant flowing out of the oil separator (34) is sent to the first and second heaters (35, 36).

[0030] The first heater (35) is provided in the third air passage (25) and functions as a radiator. The first heater (35) heats the air flowing through the third air passage (25) by exchanging heat with the high-pressure gas refrigerant flowing out of the oil separator (34). At this time, the high-pressure gas refrigerant radiates heat inside the first heater (35).

[0031] The second heater (36) is provided in the fourth air passage (26) and functions as a radiator. The second heater (36) heats the air flowing through the fourth air passage (26) by exchanging heat with the high-pressure gas refrigerant flowing out of the oil separator (34). At this time, the high-pressure gas refrigerant radiates heat inside the second heater (36). The second heater (36) is a heating heat exchanger.

[0032] The gas cooler (37) cools the high-pressure refrigerant flowing out from the first and second heaters (35, 36) by exchanging heat with outdoor air transported by a fan (not shown). The high-pressure refrigerant flowing out from the gas cooler (37) is decompressed by a first electric valve (47) and sent to the intercooler (38). The outdoor air that has passed through the gas cooler (37) is discharged to the outdoor space.

[0033] The intercooler (38) divides the incoming intermediate-pressure refrigerant, reduces the pressure of one branched refrigerant by a pressure reducing means (not shown), and uses the reduced-pressure refrigerant to cool the other branched refrigerant. The cooled refrigerant is sent to the first and second expansion valves (41, 42). The reduced-pressure refrigerant is further reduced in pressure by the second electric valve (48), merges with the refrigerant flowing out of the intercooler (33), and is sent to the compressor (32).

[0034] The first expansion valve (41) reduces the pressure of the refrigerant sent from the intercooler (38). The refrigerant reduced in pressure by the first expansion valve (41) is sent to the first cooler (44). The first expansion valve (41) is, for example, an electronic expansion valve with a variable opening.

[0035] The second expansion valve (42) reduces the pressure of the refrigerant sent from the intercooler (38). The refrigerant reduced in pressure by the second expansion valve (42) is sent to the second cooler (45). The second expansion valve (42) is, for example, an electronic expansion valve with a variable opening.

[0036] The first cooler (44) is provided in the first air passage (23) and functions as an evaporator. The first cooler (44) cools the air flowing through the first air passage (23) by heat exchange with the refrigerant flowing therein. At this time, the refrigerant evaporates inside the first cooler (44). The low-pressure gas refrigerant flowing out of the first cooler (44) is sent to the compressor (32).

[0037] The second cooler (45) is provided in the second air passage (24) and functions as an evaporator. The second cooler (45) cools the air flowing through the second air passage (24) by heat exchange with the refrigerant flowing therein. At this time, the refrigerant evaporates inside the second cooler (45). The low-pressure gas refrigerant flowing out of the second cooler (45) is sent to the compressor (32).

[0038] (4) Details of the dehumidifier Next, the adsorption rotor (22) and the casing (21) of the dehumidifier (20) will be described in detail with reference to FIGS. 3 to 8. In the following description, "upper," "lower," "left," "right," "front," and "rear" refer to the directions shown in FIGS. 4 and 5. The "left" side of the casing (21) is the surface on which a processing inlet (83) (described later) is formed, and the "right" side of the casing (21) is the surface on which a first processing outlet (84) and a second processing outlet (85) (described later) are formed.

[0039] (4-1) Adsorption rotor The adsorption rotor (22) is formed in the shape of a thick disk. The adsorption rotor (22) is configured to allow air to pass through in the thickness direction. As shown in Fig. 3, the adsorption rotor (22) has an inner frame (61), an outer frame (62), a plurality of ribs (63), and a plurality of adsorption members (64).

[0040] The inner frame (61) is formed in a thick, annular shape. The inner frame (61) is made of metal. A rotating shaft (65) is inserted into a through-hole (61a) formed in the center of the inner frame (61). The adsorption rotor (22) rotates around the rotating shaft (65).

[0041] The outer frame 62 is formed in a thick annular shape and is made of metal. The outer frame 62 is spaced apart from the inner frame 61 and is disposed generally concentrically with the inner frame 61.

[0042] Each rib (63) connects the inner frame (61) and the outer frame (62). The ribs (63) extend in the radial direction. The ribs (63) are made of metal. In this embodiment, four ribs (63) are provided, and the ribs (63) are arranged at 90° intervals. The ribs (63) correspond to the support members of the present disclosure.

[0043] Each adsorption member (64) is disposed between each rib (63). In this embodiment, four adsorption members (64) are provided. Each adsorption member (64) is formed in a fan shape. The adsorption member (64) is composed of a base material and a scavenger that captures moisture. The scavenger is made of a substance capable of absorbing moisture. The scavenger is impregnated into the base material. When the air to be treated passes through the adsorption member (64), the moisture contained in the air to be treated is captured by the scavenger on the surface of the base material. This removes moisture from the air to be treated. When regeneration air heated to a predetermined temperature passes through the adsorption member (64), moisture is released from the scavenger. This regenerates the adsorption member (64).

[0044] (4-2) Casing As described above, the casing (21) is formed in a box shape. As shown in FIG. 6 , the internal space (S) of the casing (21) of this embodiment includes a pre-treatment space (S1), a treatment space (S2), a regeneration space (S3), and a casing space (S4). In the pre-treatment space (S1), moisture in the air passing through the pre-treatment space (S1) is adsorbed by the adsorption rotor (22). In the treatment space (S2), moisture in the air passing through the pre-treatment space (S1) and then the treatment space (S2) is adsorbed by the adsorption rotor (22). In the regeneration space (S3), moisture desorbed from the adsorption rotor is added to the air passing through the regeneration space (S3). The casing space (S4) is the internal space (S) other than the pre-treatment space (S1), the treatment space (S2), and the regeneration space (S3).

[0045] As shown in FIGS. 4 and 5, the casing (21) accommodates a first seal member (71), a second seal member (72), a third seal member (73), a fourth seal member (74), and a fifth seal member (75). As shown in FIG. 4, the left side wall (21a) and the right side wall (21b) of the casing (21) are spaced apart from the adsorption rotor (22). The first to fifth seal members (71, 72, 73, 74, 75) are arranged between the side walls (21a, 21b) of the casing (21) and the adsorption rotor (22). The first to fifth seal members (71, 72, 73, 74, 75) are provided in pairs. One of the pair of seal members is arranged on one side (right side) of the adsorption rotor (22), and the other seal member is arranged on the other side (left side) of the adsorption rotor (22).

[0046] As shown in FIG. 5, the first to fifth seal members (71, 72, 73, 74, 75) divide the internal space (S) of the casing (21) into a pre-treatment space (S1), a treatment space (S2), a regeneration space (S3), and a casing space (S4). In other words, the first to fifth seal members (71, 72, 73, 74, 75) seal between the spaces (S1, S2, S3, S4). Each seal member (71, 72, 73, 74, 75) is made of an elastic material such as silicone. As shown in FIG. 4, each seal member (71, 72, 73, 74, 75) has a base end (one end) fixed to the casing (21) and a tip end (the other end) not fixed to any member. The tip of each of the seal members (71, 72, 73, 74, 75) is disposed so as to come into contact with the adsorption rotor (22).

[0047] As shown in FIG. 5 , the first seal member (71) is disposed along the inner frame (61) of the adsorption rotor (22). The second seal member (72) is disposed along the outer frame (62) of the adsorption rotor (22). The third seal member (73), the fourth seal member (74), and the fifth seal member (75) are disposed along the radial direction of the adsorption rotor (22). The first seal member (71) and the second seal member (72) seal between the casing space (S4) and the pre-treatment space (S1), the treatment space (S2), and the regeneration space (S3). In other words, the pre-treatment space (S1), the treatment space (S2), and the regeneration space (S3) are formed between the first seal member (71) and the second seal member (72). The casing space (S4) is formed between the space inside the first seal member (71) and the space outside the second seal member (72). The third seal member (73) seals between the regeneration space (S3) and the treatment space (S2). The fourth seal member (74) seals between the treatment space (S2) and the pre-treatment space (S1). The fifth seal member (75) seals between the pre-treatment space (S1) and the regeneration space (S3). In this embodiment, as shown in FIG. 5, the treatment space (S2), the pre-treatment space (S1), and the regeneration space (S3) are formed in this order in the rotation direction of the adsorption rotor (22).

[0048] As shown in FIG. 5, when the 12 o'clock position of the adsorption rotor (22) is defined as 0°, the treatment space (S2) is formed in the range of 0° to 225°. That is, the central angle of the treatment space (S2) is 225°. When the 12 o'clock position of the adsorption rotor (22) is defined as 0°, the pre-treatment space (S1) is formed in the range of 225° to 315°. That is, the central angle of the pre-treatment space (S1) is 90°. When the 12 o'clock position of the adsorption rotor (22) is defined as 0°, the regeneration space (S3) is formed in the range of 315° to 360°. That is, the central angle of the regeneration space (S3) is 45°.

[0049] Therefore, when the area of ​​a plane perpendicular to the air flow direction of the adsorption rotor (22) is defined as the ventilation area, the ratio of the ventilation areas of the treatment space (S2), pre-treatment space (S1), and regeneration space (S3) in this embodiment is 5:2:1. Here, the treatment space (S2) and pre-treatment space (S1) are both spaces where moisture in the air is adsorbed by the adsorption rotor (22). Therefore, when both spaces are collectively referred to as the treatment-side spaces (S1, S2), in this embodiment, the ratio of the ventilation areas of the treatment-side spaces (S1, S2) and the regeneration space (S3) is 7:1. The ratio of the ventilation areas of the treatment space (S2) and the regeneration space (S3) (ventilation area of ​​the treatment space (S2) : ventilation area of ​​the regeneration space (S3)) is preferably 3:1, 4:1, 5:1, or 6:1, and more preferably 5:1.

[0050] As shown in FIG. 6, seven openings are formed in the casing (21). Specifically, three openings are formed in the left side wall (21a). The openings formed in the left side wall (21a) are a pre-treatment outlet (82), a treatment inlet (83), and a regeneration outlet (87). Four openings are formed in the right side wall (21b). The openings formed in the right side wall (21b) are a pre-treatment inlet (81), a first treatment outlet (84), a second treatment outlet (85), and a regeneration inlet (86).

[0051] The pre-treatment inlet (81) and the pre-treatment outlet (82) open to the pre-treatment space (S1). The pre-treatment inlet (81) is the outlet end of the first air passage (23). The pre-treatment outlet (82) is the inlet end of the second air passage (24). The air flowing out from the pre-treatment outlet (82) is supplied to the treatment space (S2) via the treatment inlet (83).

[0052] The processing inlet (83), the first processing outlet (84), and the second processing outlet (85) open to the processing space (S2). The processing inlet (83) is the outlet end of the second air passage (24). The first processing outlet (84) is the inlet end of the third air passage (25). The air flowing out from the first processing outlet (84) is supplied to the target space (11). The second processing outlet (85) is the inlet end of the fourth air passage (26). The air flowing out from the second processing outlet (85) is supplied to the regeneration space (S3).

[0053] The regeneration inlet (86) and the regeneration outlet (87) open to the regeneration space (S3). The regeneration inlet (86) is the outlet end of the fourth air passage (26). The regeneration outlet (87) is the inlet end of the fifth air passage (27). The air flowing out through the regeneration outlet (87) is discharged to the outdoor space.

[0054] The processing inlet (83) corresponds to the inlet of the present disclosure, the processing first outlet (84) corresponds to the first outlet of the present disclosure, and the processing second outlet (85) corresponds to the second outlet of the present disclosure.

[0055] FIG. 7 is a diagram showing the right side wall (21b) of the casing (21). A hole (91) that is slightly smaller than the outer diameter of the adsorption rotor (22) is formed in the right side wall (21b). A semicircular flat plate (92) is fixed to the surface of the side wall (21b). When the 12 o'clock position of the hole (91) in the side wall (21b) is defined as 0°, the flat plate (92) is positioned so as to cover a range of 225° to 405° of the hole (91) in the side wall (21b). Three circular openings of different sizes are formed in the flat plate (92).

[0056] The portion of the hole (91) in the side wall (21b) that is not covered by the flat plate (92) is the first processing outlet (84). The first processing outlet (84) is formed in a fan shape. The opening with the largest diameter among the openings in the flat plate (92) is the pre-processing inlet (81). The pre-processing inlet (81) is formed in a region of the flat plate (92) that ranges from 225° to 315°. The opening with the second largest diameter among the openings in the flat plate (92) is the regeneration inlet (86). The regeneration inlet (86) is formed in a region of the flat plate (92) that ranges from 315° to 360°. The opening with the smallest diameter among the openings in the flat plate (92) is the second processing outlet (85). The second processing outlet (85) is formed in a region of the flat plate (92) that ranges from 0° to 45°.

[0057] The second processing outlet (85), the first processing outlet (84), the pre-processing inlet (81), and the regeneration inlet (86) are arranged in this order in the rotation direction of the adsorption rotor (22). In other words, the second processing outlet (85) is arranged between the regeneration inlet (86) and the first processing outlet (84) in the rotation direction of the adsorption rotor (22).

[0058] In this way, the second processing outlet (85) and the first processing outlet (84) are arranged in this order in the rotation direction of the adsorption rotor (22), so that the adsorption rotor (22) passes through the second processing outlet (85) in the processing space (S2) and then enters the first processing outlet (84). Therefore, when the adsorption rotor (22) passes through the regeneration space (S3) and enters the processing space (S2), the humid air remaining in the adsorption rotor (22) is pushed out through the second processing outlet (85) and supplied to the regeneration space (S3). As a result, the adsorption rotor (22) entering the first processing outlet (84) does not contain humid air, and therefore can sufficiently adsorb moisture in the air in the processing space (S2).

[0059] The casing (21) has a guide portion (93) that guides a portion of the air in the processing space (S2) to the second processing outlet (85). Specifically, the guide portion (93) is formed on a flat plate (92). In FIG. 7, the guide portion (93) is a sector-shaped portion of the flat plate (92) having an angle ranging from 0° to 45°. The guide portion (93) is provided so as to surround the entire periphery of the second processing outlet (85). This allows the air around the second processing outlet (85) in the processing space (S2) to flow along the guide portion (93) and to be easily collected at the second processing outlet (85). As a result, a sufficient amount of air can be supplied to the regeneration space (S3).

[0060] (4-3) Issues with the ribs of the adsorption rotor FIG. 8 shows a cross-sectional view of a casing (121) accommodating an adsorption rotor (122) of the comparative example. The dehumidifier (120) of the comparative example differs from the dehumidifier (20) of the present disclosure in that it includes one additional seal member. Specifically, as shown in FIG. 8, the dehumidifier (20) includes a sixth seal member (176). The sixth seal member (176) is disposed along the radial direction of the adsorption rotor (22). The sixth seal member (176) is disposed between the third seal member (173) and the fourth seal member (174) in the rotational direction of the adsorption rotor (22). A purge space (S15) is formed between the third seal member (173) and the sixth seal member (176). A treatment space (S12) is formed between the sixth seal member (176) and the fourth seal member (174). The sixth seal member (176) seals the purge space (S15) from the treatment space (S12). That is, the dehumidifier (120) of the comparative example differs from the dehumidifier (20) of the present disclosure in that it has the purge space (S15). The air flowing out of the purge space (S15) is supplied to the regeneration space (S13).

[0061] In the dehumidification device (120) of the comparative example, the regeneration space (S13), the purge space (S15), the treatment space (S12), and the pre-treatment space (S11) are arranged in this order in the rotation direction of the adsorption rotor (122). Therefore, the adsorption rotor (122) passes through the regeneration space (S13) and enters the purge space (S15). In the purge space (S15), humid air remaining in the adsorption rotor (122) is pushed out of the adsorption rotor (122) and supplied to the regeneration space (S13). At the same time, in the purge space (S15), heat imparted in the regeneration space (S13) is transferred to the air passing through the purge space (S15). This allows the temperature of the air to be supplied to the regeneration space (S13) to be increased in advance.

[0062] Generally, the ventilation area of ​​each of the regeneration space (S13) and the purge space (S15) is smaller than that of the treatment side spaces (S11, S12), because the adsorption rotor (122) can perform regeneration in a shorter time than adsorption.

[0063] In the dehumidifier (120) of this comparative example, when the adsorption rotor (122) has ribs (163), as shown in FIG. 8 , when the ribs (163) enter the purge space (S15), the ribs (163) block air, thereby reducing the airflow rate in the purge space (S15). Because the purge space (S15) and the regeneration space (S13) are in communication with each other, the reduction in the airflow rate in the purge space (S15) also reduces the airflow rate in the regeneration space (S13). Similarly, when the ribs (163) enter the regeneration space (S13), the airflow rate in the regeneration space (S13) (hereinafter referred to as regeneration airflow rate) also decreases. Therefore, when the ribs (163) enter the regeneration space (S13) or the purge space (S15) as the adsorption rotor (122) rotates, the regeneration airflow rate decreases. If the regeneration airflow rate decreases, the regeneration rate of the adsorption member (164) in the regeneration space (S13) decreases. When the adsorption rotor (122) rotates in this state, the adsorption member (164) with insufficient moisture content enters the treatment space (S12), thereby reducing the dehumidification rate of the adsorption rotor (122). In other words, the regeneration airflow rate decreases during the period when the adsorption rotor (122) passes through the regeneration space (S13) and the purge space (S15) during one rotation of the adsorption rotor (122), thereby reducing the dehumidification rate of the adsorption rotor (122).

[0064] In contrast, in the present disclosure, no purge space is formed in the internal space (S). Therefore, in the present disclosure, the regeneration airflow rate decreases only when the ribs (63) of the adsorption rotor (22) pass through the regeneration space (S3) during one rotation of the adsorption rotor (22). Therefore, compared to the comparative example in which the dehumidifier (120) has a purge space (S15), the dehumidifier (20) of the present disclosure can suppress a decrease in the regeneration rate of the adsorption rotor (22), and therefore a decrease in the dehumidification rate.

[0065] (5) Driving behavior During operation of the dehumidification system (10), the first fan (52), the second fan (53), and the third fan (54) are driven in the dehumidifier (20), and the adsorption rotor (22) is rotated. During operation of the dehumidification system (10), the compressor (32) is driven in the refrigeration unit (30), thereby performing a vapor compression refrigeration cycle in the refrigerant circuit (31). The operation of the dehumidifier (20) will now be described in particular.

[0066] In the dehumidifier (20), outdoor air (OA) flows into the first air passage (23). The outdoor air (OA) flowing through the first air passage (23) is cooled when passing through the first cooler (44). The air flowing through the first air passage (23) flows into the pre-treatment space (S1) of the casing (21), where moisture is adsorbed by the adsorption rotor (22) and the air is dehumidified (hereinafter, the air that has passed through the pre-treatment space (S1) is referred to as first dehumidified air).

[0067] The first dehumidified air flows into the second air passage (24) and then merges with the room air (RA) from the target space (11) that has flowed through the return air passage (28) to form mixed air. The mixed air flowing through the second air passage (24) is cooled as it passes through the second cooler (45) and then flows into the treatment space (S2) of the casing (21). In the treatment space (S2), the adsorption rotor (22) adsorbs moisture from the mixed air, thereby dehumidifying it (hereinafter, the air that has passed through the treatment space (S2) is referred to as second dehumidified air).

[0068] A portion of the second dehumidified air flows into the third air passage (25) and is heated while passing through the first heater (35). In the third air passage (25), the heated air is supplied to the target space (11) as supply air (SA). In this manner, the target space (11) is dehumidified. A portion of the air in the target space (11) is exhausted to the outdoor space through the exhaust port (14) as exhaust air (EA). Another portion of the air in the target space (11) flows into the return air passage (28) through the return air port (13).

[0069] The remaining part of the second dehumidified air flows into the fourth air passage (26). The air that flows into the fourth air passage (26) is heated while passing through the second heater (36) and then flows into the regeneration space (S3) of the casing (21). The air that flows into the regeneration space (S3) is given moisture by the adsorption rotor (22) in the regeneration space (S3). This regenerates the adsorption rotor (22) (hereinafter, the air that has passed through the regeneration space (S3) is referred to as humidified air). The humidified air flows through the fifth air passage (27) and is exhausted to the outdoor space as exhaust air (EA).

[0070] (6) Features (6-1) In this embodiment, the second processing outlet (85) and the first processing outlet (84) are arranged in this order in the rotation direction of the adsorption rotor (22). Therefore, when the adsorption rotor (22) rotates, the adsorption rotor (22) passes through the second processing outlet (85) in the processing space (S2) and then enters the first processing outlet (84). Therefore, when the adsorption rotor (22) passes through the regeneration space (S3) and then enters the processing space (S2), the humid air remaining in the adsorption rotor (22) is pushed out and supplied to the regeneration space (S3) through the second processing outlet (85). In this embodiment, the regeneration airflow rate decreases only when the support member (63) of the adsorption rotor (22) passes through the regeneration space (S3) during one rotation of the adsorption rotor (22). Therefore, compared to when the dehumidification device has a purge space, the regeneration rate of the adsorption rotor (22) can be suppressed, thereby suppressing a decrease in the dehumidification rate.

[0071] (6-2) In this embodiment, the air flowing out of the pre-treatment space (S1) is supplied to the treatment space (S2) through the treatment inlet (83). As a result, the air passes through the pre-treatment space (S1) and the treatment space (S2), and is dehumidified twice. This allows the generation of air with a lower dew point.

[0072] (6-3) In this embodiment, the casing (21) has a guide portion (93) that is provided so as to surround the entire periphery of the second processing outlet (85). This allows the air around the second processing outlet (85) to flow along the guide portion (93) and to easily gather at the second processing outlet (85). This ensures a sufficient amount of air to be supplied to the regeneration space (S3).

[0073] (7) Variations The above embodiment may be modified as follows: In the following description, differences from the above embodiment will be mainly explained.

[0074] As shown in Fig. 9, in the dehumidifier (20) of this embodiment, the internal space (S) of the casing (21) does not have to have the pre-treatment space (S1). In other words, the internal space (S) has a treatment space (S2), a regeneration space (S3), and a casing space (S4). In this case, as shown in Fig. 9, no fourth seal member is provided. In this case, the dehumidifier (20) does not have a first air passage, and the inlet end of the second air passage (24) communicates with the outdoor space.

[0075] In this modification, the dehumidifier (20) does not have a purge space, so that the reduction in the amount of regeneration of the adsorption rotor (22) can be suppressed, and as a result, the reduction in the amount of dehumidification can be suppressed.

[0076] Other Embodiments The above embodiment may be configured as follows.

[0077] In the above embodiment, the outlet end of the return air passage (28) may be in communication with the first air passage (23) at a location upstream of the first cooler (44).

[0078] Although the embodiments and modifications have been described above, it will be understood that various modifications in form and details are possible without departing from the spirit and scope of the claims. Furthermore, elements of the above embodiments, modifications, and other embodiments may be combined or substituted as appropriate.

[0079] The terms "first," "second," "third," etc. mentioned above are used to distinguish the terms to which these terms are attached, and do not limit the number or order of the terms. [Industrial Applicability]

[0080] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for dehumidification devices. [Explanation of symbols]

[0081] 2 Dehumidifier 11 Target Space 20 Dehumidifier 21 Casing 22 Adsorption rotor 63 Ribs 83 Processing inlet (inlet) 84 Treatment outlet No. 1 (Outlet No. 1) 85 Second outlet for treatment (second outlet) 93 Information Department S interior space S1 Pre-treatment space S2 Processing Space S3 playback space

Claims

1. A dehumidification device that supplies dehumidified air to a target space (11), a rotary adsorption rotor (22) having a radially extending support member (63) and capable of adsorbing and desorbing moisture; a casing (21) that houses the adsorption rotor (22) and has an internal space (S) through which air flows, The internal space (S) is a treatment space (S2) in which moisture in the air is adsorbed by the adsorption rotor (22); a regeneration space (S3) in which the moisture desorbed from the adsorption rotor (22) is added to the air; The casing (21) is formed with an inlet (83), a first outlet (84), and a second outlet (85) that open into the treatment space (S2); The dehumidifying device is a supply-side air passage (25) that connects the first outlet (84) and the target space (11) and supplies the air flowing out from the first outlet (84) to the target space (11); a regeneration-side air passage (26) connecting the second outlet (85) and the regeneration space (S3) and supplying the air flowing out from the second outlet (85) to the regeneration space (S3), The second outlet (85) and the first outlet (84) are arranged in this order in the rotation direction of the adsorption rotor (22). Dehumidifier.

2. the internal space (S) further includes a pre-treatment space (S1) in which moisture in the air is adsorbed by the adsorption rotor (22); The air flowing out of the pre-treatment space (S1) is supplied to the treatment space (S2) through the inlet (83). The dehumidifier of claim 1 .

3. The casing (21) has a guide portion (93) provided so as to surround the entire periphery of the second outlet (85). The dehumidifier according to claim 1 or 2.

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