JP6754578B2 - Dehumidification system - Google Patents

Description

The present invention relates to a dehumidifying system.

Conventionally, a humidity control device (dehumidifying device) that dehumidifies air and supplies it to an indoor space is known. For example, Patent Document 1 describes a humidity control device including a refrigerant circuit having two adsorption heat exchangers and dehumidifying air in the adsorption heat exchangers. In this humidity control device, the first operation in which the first adsorption heat exchanger becomes an evaporator and the second adsorption heat exchanger becomes a condenser, and the first adsorption heat exchanger becomes a condenser and the second adsorption heat exchanger evaporates. The second operation, which serves as a device, is alternately repeated. Then, this humidity control device is configured to supply dehumidified air to the indoor space by passing through the adsorption heat exchanger which is the evaporator of the first and second adsorption heat exchangers in the dehumidifying operation. ing.

Japanese Unexamined Patent Publication No. 2004-294048

In the dehumidification system equipped with the humidity control unit as described above, the air that has passed through the adsorption heat exchanger that is the evaporator is relatively low temperature and low humidity, and the adsorption heat exchanger that is the condenser. The air that has passed through is relatively hot and humid. Then, the air that has passed through the adsorption heat exchanger that is the evaporator passes through the air supply passage (the air passage that connects the humidity control unit and the indoor space) and is supplied to the indoor space.

However, immediately after the operation of the humidity control unit is switched from the first operation to the second operation (or from the second operation to the first operation), the residual heat of the adsorption heat exchanger switched from the condenser to the evaporator causes Moisture contained in the adsorbent of the adsorption heat exchanger is released to the air passing through the adsorption heat exchanger, and as a result, high temperature and high humidity air is supplied from the adsorption heat exchanger to the air supply passage. Therefore, the relative humidity of the air (supplied air) that passes through the air supply passage and is supplied to the indoor space suddenly increases. In this way, the relative humidity of the supplied air (air supplied to the indoor space) fluctuates due to the operation switching of the humidity control unit, so it is difficult to stabilize the relative humidity of the air in the indoor space. It was.

Therefore, an object of the present invention is to provide a dehumidifying system capable of suppressing humidity fluctuations of supply air due to operation switching of a humidity control unit.

The first invention has an air supply passage (P2) for supplying air to the indoor space (S1), and first and second adsorption heat exchangers (61,62) on which an adsorbent is carried. The first operation in which the first adsorption heat exchanger (61) acts as an evaporator to dehumidify air and the second adsorption heat exchanger (62) acts as a condenser to regenerate the adsorbent, and the first adsorption. The heat exchanger (61) acts as a condenser to regenerate the adsorbent, and the second adsorption heat exchanger (62) acts as an evaporator to perform the second operation of dehumidifying the air alternately. With the humidity control unit (20) that supplies the air that has passed through the adsorption heat exchanger (61,62), which is the evaporator of the second adsorption heat exchanger (61,62), to the air supply passage (P2). The air supply passage (P2) is provided in the middle of the air supply passage (P2), and is provided with an adsorption member (21) on which an adsorbent is supported to bring the air flowing through the air supply passage (P2) into contact with the adsorbent. An air supply chamber (C2) is provided in the middle of (P2), and the cross-sectional area of the flow path of the air supply chamber (C2) is wider than the cross-sectional area of the flow path of the air supply passage (P2). The suction member (21) is provided in the air supply chamber (C2), and is located downstream of the central position of the air supply chamber (C2) in the air flow direction in the air supply chamber (C2). It is a dehumidifying system characterized by being arranged .

In the first invention, the relative humidity of the air flowing out of the humidity control unit (20) and flowing through the air supply passage (P2) is determined by providing the suction member (21) in the middle of the air supply passage (P2). Sudden fluctuations can be suppressed. Specifically, the higher the relative humidity of the air passing through the adsorbing member (21), the larger the adsorbed amount (the amount of water that can be adsorbed) of the adsorbent of the adsorbing member (21) tends to be. Therefore, when the relative humidity of the air passing through the adsorbing member (21) suddenly increases, the amount of adsorbed agent adsorbed by the adsorbing member (21) increases, and as a result, the air passing through the adsorbing member (21) is contained. Moisture is adsorbed by the adsorbent of the adsorbing member (21) to dehumidify the air (air passing through the adsorbing member (21)). In this way, the suction member (21) can suppress sudden fluctuations in the relative humidity of the air (supply air (SA)) that flows out of the humidity control unit (20) and flows through the air supply passage (P2). ..

Further, in the first invention, since the flow path cross section of the air supply chamber (C2) is wider than the flow path cross section of the air supply passage (P2), the air flowing through the air supply chamber (C2) The flow velocity can be reduced. As a result, the contact time between the air passing through the adsorbent member (21) and the adsorbent of the adsorbent member (21) can be lengthened, so that the sudden fluctuation of the relative humidity of the air in the adsorbent member (21) is sufficient. Can be suppressed. Further, since the residence time of air in the air supply chamber (C2) can be lengthened, the air can be sufficiently mixed in the air supply chamber (C2). Specifically, the hot and humid air supplied from the adsorption heat exchanger (61,62) immediately after switching from the condenser to the evaporator, and then the adsorption heat exchanger (becomes an evaporator). It can be mixed with low temperature and low humidity air supplied from the adsorption heat exchanger (61,62) .

Further, in the first invention, by arranging the suction member (21) on the downstream side of the central position in the air flow direction of the air supply chamber (C2), the suction member (21) is sufficiently mixed in the air supply chamber (C2). It is possible to supply air having a uniform relative humidity to the adsorption member (21).

The second invention is the air supply fan (22) provided in the air supply passage (P2) in the first invention and transports air from the humidity control unit (20) to the indoor space (S1). ), And the air supply fan (22) is a dehumidification system characterized in that it is arranged in the air supply passage (P2) on the upstream side in the air flow direction with respect to the air supply chamber (C2). ..

In the second invention, the internal pressure of the air supply chamber (C2) is increased by arranging the air supply fan (22) upstream of the air supply chamber (C2) in the air supply passage (P2). It can be positive pressure. As a result, it is possible to suppress the intrusion of air from the outside of the air supply chamber (C2) into the inside of the air supply chamber (C2).

The third invention is the air supply fan (22) provided in the air supply passage (P2) and transporting air from the humidity control unit (20) to the indoor space (S1) in the first invention. ), And the air supply fan (22) is a dehumidification system characterized in that the air supply passage (P2) is arranged on the downstream side in the air flow direction with respect to the air supply chamber (C2). ..

In the third invention, the condenser is switched to the evaporator by arranging the air supply fan (22) downstream of the air supply chamber (C2) in the air supply passage (P2) in the air flow direction. It is possible to prevent the high-temperature and high-humidity air supplied from the adsorption heat exchangers (61,62) immediately after the adsorption from passing through the air supply fan (22) before passing through the adsorption member (21).

According to the fourth invention, in any one of the first to third inventions, the humidity control unit (20) is supplied with outdoor air (OA) taken in from the outside, and the humidity control unit (20) is supplied with outdoor air (OA). 20) is characterized in that the outdoor air (OA) supplied to the humidity control unit (20) is supplied to each of the first and second adsorption heat exchangers (61,62). It is a dehumidifying system.

In the fourth invention described above, air is unilaterally supplied from the humidity control unit (20) to the indoor space (S1) without supplying the indoor air (RA) from the indoor space (S1) to the humidity control unit (20). Therefore, the internal pressure of the indoor space (S1) can be made positive. As a result, it is possible to suppress the intrusion of air from the outside of the indoor space (S1) into the inside of the indoor space (S1), so that the humidity of the indoor air (RA) caused by the intrusion of air into the indoor space (S1) Fluctuations can be suppressed.

A fifth invention relates to a suction passage (P1) for supplying air to the humidity control unit (20) and the humidity control unit (20) in any one of the first to fourth inventions. A regeneration passage (P3) for supplying air, an auxiliary passage (P5) for supplying air to the indoor space (S1), and a heater (P5) for heating the air flowing through the auxiliary passage (P5). 30) and a flow path switching mechanism (40) are provided, and the humidity control unit (20) uses the air supplied from the suction passage ( P1 ) to the humidity control unit (20) as the evaporator. The adsorption heat exchanger (61,62), which is the condenser, supplies the air supplied to the adsorption heat exchanger (61,62) and the air supplied to the humidity control unit (20) from the regeneration passage (P3). The flow path switching mechanism (40) allows air to flow through the suction passage (P1) and the regeneration passage (P3), while allowing air to flow through the auxiliary passage (P5). A first flow path state that shuts off the air flow, and a second flow path state that blocks the air flow in the suction passage (P1) and the regeneration passage (P3) while allowing the air flow in the auxiliary passage (P5). It is a dehumidifying system characterized in that it is configured to be switchable to and.

In the fifth aspect of the invention, when the flow path switching mechanism (40) is set to the first flow path state, the dehumidified air in the humidity control unit (20) passes through the adsorption member (21) to create an indoor space. It is supplied to (S1). That is, by setting the flow path switching mechanism (40) to the first flow path state, the dehumidifying operation using the humidity control unit (20) can be performed. On the other hand, when the flow path switching mechanism (40) is set to the second flow path state, the air heated by the heater (30) is supplied to the indoor space (S1). As a result, the temperature of the indoor air (RA) can be raised and the relative humidity of the indoor air (RA) can be lowered. That is, by setting the flow path switching mechanism (40) to the second flow path state, the heating operation using the heater (30) can be performed.

According to the first invention, the suction member (21) can suppress sudden fluctuations of the air (supply air (SA)) flowing out of the humidity control unit (20) and flowing through the air supply passage (P2). Therefore, it is possible to suppress the humidity fluctuation of the supply air (SA) caused by the operation switching of the humidity control unit (20).

Further, according to the first invention, the sudden fluctuation of the relative humidity of the air can be sufficiently suppressed in the adsorption member (21), and the air can be sufficiently mixed in the air supply chamber (C2). Therefore, it is possible to improve the effect of suppressing the humidity fluctuation of the supply air (SA) caused by the operation switching of the humidity control unit (20).

Further , according to the first invention, since air that is sufficiently mixed in the air supply chamber (C2) and has a uniform relative humidity can be supplied to the adsorption member (21), the humidity control unit (20) It is possible to further improve the effect of suppressing the humidity fluctuation of the supply air (SA) caused by the operation switching of.

According to the second invention, it is possible to suppress the intrusion of air from the outside of the air supply chamber (C2) into the inside of the air supply chamber (C2), which is caused by the intrusion of air into the air supply chamber (C2). Humidity fluctuations in the supplied air (SA) can be suppressed.

According to the third invention, the hot and humid air supplied from the adsorption heat exchanger (61,62) immediately after the switch from the condenser to the evaporator is supplied before passing through the adsorption member (21). Since it is possible to avoid passing through the air fan (22), a malfunction of the air supply fan (22) due to the supply of hot and humid air to the air supply fan (22) (for example, the air supply fan (22)). 22) With dew) can be prevented.

According to the fourth invention, it is possible to suppress the intrusion of air from the outside of the indoor space (S1) into the inside of the indoor space (S1), so that the indoor air caused by the intrusion of air into the indoor space (S1) Humidity fluctuation of (RA) can be suppressed.

According to the fifth invention, by setting the flow path switching mechanism (40) to the first flow path state, the dehumidifying operation using the humidity control unit (20) can be performed, and the flow path switching mechanism (40) can be performed. ) Is set to the second flow path state, so that the heating operation using the heater (30) can be performed. Therefore, the dehumidifying operation using the humidity control unit (20) and the heater (30) are used. It is possible to switch between heating operation.

FIG. 1 is a piping system diagram showing a configuration example of a dehumidifying system according to an embodiment. FIG. 2 is a conceptual diagram showing a configuration example of the humidity control unit. FIG. 3 is a piping system diagram showing the air flow in the dehumidifying operation. FIG. 4 is a piping system diagram showing the flow of air in the heating operation. FIG. 5 is a piping system diagram showing a modified example of the dehumidifying system.

Hereinafter, embodiments will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals, and the description thereof will not be repeated.

(Dehumidification system)
FIG. 1 shows a configuration example of the dehumidifying system (10) according to the embodiment. This dehumidifying system (10) dehumidifies air and supplies it to the indoor space (S1). It is a humidity control unit (20), an adsorption member (21), an air supply fan (22), and an air supply filter (23). ), A heater (30), an auxiliary fan (31), an auxiliary filter (32), and a controller (70). In addition, this dehumidification system (10) is provided with an outside air chamber (C1), a suction passage (P1), an air supply passage (P2), a regeneration passage (P3), an exhaust passage (P4), and an auxiliary passage (P5). Has been done.

In this example, an intermediate room (S2) is provided so as to surround the indoor space (S1). Further, the floor of the intermediate chamber (S2) is provided with an intermediate air outlet (33) that opens into the intermediate chamber (S2), and the ceiling of the indoor space (S1) opens into the indoor space (S1). A plurality of (4 in this example) air supply outlets (24) and an air supply air outlet (34) that communicates the indoor space (S1) and the intermediate chamber (S2) are provided. In addition, a part of the air in the indoor space (S1) (indoor air (RA)) is discharged to the outdoor space through a gap in a building constituting the indoor space (S1). For example, the indoor space (S1) is an exhibition space (a space where works of art and cultural properties are arranged) provided in facilities such as museums and temples, and the intermediate room (S2) is the heat insulating space of the exhibition space. It is an air layer provided around the exhibition space for the purpose of securing.

[Outside air chamber]
The outside air chamber (C1) is a chamber for taking in outdoor air (OA) from the outside. For example, the outside air chamber (C1) is formed in a rectangular parallelepiped box shape.

[Suction passage]
The suction passage (P1) supplies the humidity control unit (20) with treated air (air treated in the humidity control unit (20), in this example, outdoor air (OA) taken into the outside air chamber (C1)). It is an air passage to do. In this example, the suction passage (P1) has its inflow end connected to the outside air chamber (C1) and its outflow end connected to the humidity control unit (20).

[Air supply passage]
The air supply passage (P2) is an air passage for supplying air from the humidity control unit (20) to the indoor space (S1). In this example, the air supply passage (P2) has its inflow end connected to the humidity control unit (20) and its outflow end connected to the air supply outlet (24) that opens into the indoor space (S1). ..

In this example, the air supply passage (P2) has a main passage portion (P21) and a plurality of (four in this example) branch passage portions (P22). The inflow end of the main passage portion (P21) is connected to the humidity control unit (20). In the plurality of branch passages (P22), their inflow ends are commonly connected to the outflow ends of the main passage (P21), and their outflow ends are connected to the plurality of air supply outlets (24), respectively. ..

Further, in this example, an air supply chamber (C2) is provided in the middle part of the air supply passage (P2) (specifically, the middle part of the main passage (P21)). The flow path cross section of the air supply chamber (C2) is wider than the flow path cross section of the air supply passage (P2). For example, the air supply chamber (C2) is formed in a rectangular parallelepiped box shape (preferably a rectangular parallelepiped box shape extending in the air flow direction).

[Regeneration passage]
The regeneration passage (P3) is used to supply the regeneration air (air for regenerating the adsorbent, in this example, the outdoor air (OA) taken into the outside air chamber (C1)) to the humidity control unit (20). It is an air passage. In this example, the regeneration passage (P3) has its inflow end connected to the outside air chamber (C1) and its outflow end connected to the humidity control unit (20).

[Exhaust passage]
The exhaust passage (P4) is an air passage for discharging air from the humidity control unit (20) to the outdoor space. In this example, the exhaust passage (P4) has its inflow end connected to the humidity control unit (20), and its outflow end opens into the outdoor space.

[Auxiliary passage]
The auxiliary passage (P5) is an air passage for supplying air to the indoor space (S1) by a route different from the air supply passage (P2). In this example, the auxiliary passage (P5) has its inflow end connected to the outside air chamber (C1) and its outflow end connected to an intermediate outlet (33) that opens into the intermediate chamber (S2).

[Humidity control unit]
The humidity control unit (20) has first and second adsorption heat exchangers (61,62) on which an adsorbent is carried, and the first adsorption heat exchanger (61) acts as an evaporator to dehumidify air. The first operation in which the second adsorption heat exchanger (62) acts as a condenser to regenerate the adsorbent, and the first operation in which the first adsorption heat exchanger (61) acts as a condenser to regenerate the adsorbent and the second adsorption heat The exchanger (62) acts as an adsorber and is configured to alternately perform the second operation of dehumidifying the air. In the following description, the first and second adsorption heat exchangers (61,62) are collectively referred to as "adsorption heat exchangers (61,62)".

Further, the humidity control unit (20) uses the air (in this example, the outdoor air (OA)) taken into the humidity control unit (20) from the suction passage (P1) into the first and second adsorption heat exchangers (61). Of (62), the air is supplied to the adsorption heat exchanger (61,62), which is the evaporator, and the air that has passed through the adsorption heat exchanger (61,62), which is the evaporator, is supplied to the air supply passage (P2). ), While the air taken into the humidity control unit (20) from the regeneration passage (P3) (in this example, the outdoor air (OA)) is supplied to the first and second adsorption heat exchangers (61,62). Of these, the air is supplied to the adsorption heat exchanger (61,62), which is a condenser, and the air that has passed through the adsorption heat exchanger (61,62), which is the condenser, is discharged to the exhaust passage (P4). It is configured as follows.

Specifically, the humidity control unit (20) includes a casing (51), a refrigerant circuit (52), and a switching mechanism (53).

<casing>
The casing (51) is formed in a rectangular parallelepiped box shape. A first humidity control chamber (S51) and a second humidity control chamber (S52) are formed in the casing (51). The first adsorption heat exchanger (61) is arranged in the first humidity control chamber (S51), and the second adsorption heat exchanger (62) is arranged in the second humidity control chamber (S52).

<Refrigerant circuit>
As shown in FIG. 2, the refrigerant circuit (52) includes a compressor (60), first and second adsorption heat exchangers (61,62), an expansion valve (63), and a four-way switching valve (64). Then, the refrigerant is circulated to perform the refrigeration cycle operation.

《Compressor》
The compressor (60) compresses and discharges the refrigerant, and is configured so that its rotation speed (operating frequency) can be changed. For example, the compressor (60) is composed of a variable capacitance type compressor (rotary type, swing type, scroll type, etc.) whose rotation speed can be adjusted by an inverter circuit (not shown).

《Adsorption heat exchanger》
The adsorption heat exchanger (61,62) is configured by carrying an adsorbent on the surface of a heat exchanger (for example, a cross-fin type fin-and-tube heat exchanger). The adsorbent may be composed of zeolite, silica gel, activated carbon, or an organic polymer material having a hydrophilic functional group, and is a material having not only a function of adsorbing water but also a function of absorbing water (so-called). , Adsorbent).

《Expansion valve》
The expansion valve (63) is an expansion mechanism for reducing the pressure of the refrigerant, and is provided between the liquid side ends of the first and second adsorption heat exchangers (62). For example, the expansion valve (63) is composed of an electric valve whose opening degree can be adjusted.

《Four-way switching valve》
The four-way switching valve (64) has first to fourth ports, the first port is connected to the discharge pipe of the compressor (60), and the second port is connected to the suction pipe of the compressor (60). The third port is connected to the gas side end of the second adsorption heat exchanger (62), and the fourth port is connected to the gas side end of the first adsorption heat exchanger (61). The four-way switching valve (64) has a first communication state (state shown by a solid line in FIG. 2) in which the first port and the third port communicate with each other and the second port and the fourth port communicate with each other. It is configured so that the first port and the fourth port can communicate with each other and the second port and the third port can be alternately switched to the second communication state (the state shown by the broken line in FIG. 2).

<< Operation by refrigerant circuit >>
With the above configuration, the refrigerant circuit (52) is configured so that the first refrigeration cycle operation (first operation) and the second refrigeration cycle operation (second operation) can be alternately performed.

-First refrigeration cycle operation (first operation)-
In the first refrigeration cycle operation, the four-way switching valve (64) is set to the first communication state (the state shown by the solid line in FIG. 2), the compressor (60) is set to the driving state, and the expansion valve (63). The opening degree of is adjusted to a predetermined opening degree. As a result, in the refrigerant circuit (52), the first adsorption heat exchanger (61) becomes an evaporator and the second adsorption heat exchanger (62) becomes a condenser. Specifically, the refrigerant discharged from the compressor (60) passes through the four-way switching valve (64) and then dissipates heat in the second adsorption heat exchanger (62) and condenses. As a result, in the second adsorption heat exchanger (62), the adsorbent is heated by the heat radiation of the refrigerant, and the moisture of the adsorbent is released into the air to regenerate the adsorbent. The refrigerant that has passed through the second adsorption heat exchanger (62) is depressurized by the expansion valve (63), and then absorbs heat in the first adsorption heat exchanger (61) and evaporates. As a result, in the first adsorption heat exchanger (61), the adsorbent is cooled by the heat absorption of the refrigerant, the moisture in the air is adsorbed by the adsorbent, the air is dehumidified, and the adsorption heat generated by the adsorption is absorbed by the refrigerant. Will be done. The refrigerant that has passed through the first adsorption heat exchanger (61) is sucked into the compressor (60) and compressed after passing through the four-way switching valve (64).

-Second refrigeration cycle operation (second operation)-
In the second refrigeration cycle operation, the four-way switching valve (64) is set to the second communication state (the state shown by the broken line in FIG. 2), the compressor (60) is driven, and the opening degree of the expansion valve (63) is opened. Is adjusted to a predetermined opening. As a result, in the refrigerant circuit (52), the first adsorption heat exchanger (61) becomes a condenser and the second adsorption heat exchanger (62) becomes an evaporator. Specifically, the refrigerant discharged from the compressor (60) dissipates heat and condenses in the first adsorption heat exchanger (61) after passing through the four-way switching valve (64). As a result, in the first adsorption heat exchanger (61), the adsorbent is heated by the heat radiation of the refrigerant, and the moisture of the adsorbent is released into the air to regenerate the adsorbent. The refrigerant that has passed through the first adsorption heat exchanger (61) is depressurized at the expansion valve (63), and then absorbs heat at the second adsorption heat exchanger (62) and evaporates. As a result, in the second adsorption heat exchanger (62), the adsorbent is cooled by the heat absorption of the refrigerant, the moisture in the air is adsorbed by the adsorbent, the air is dehumidified, and the adsorption heat generated by the adsorption is absorbed by the refrigerant. Will be done. The refrigerant that has passed through the second adsorption heat exchanger (62) is sucked into the compressor (60) and compressed after passing through the four-way switching valve (64).

In this way, the air passing through the adsorption heat exchanger (61,62), which is an evaporator, is deprived of water by the adsorbent of the adsorption heat exchanger (61,62), and the relative humidity decreases, and at the same time, the relative humidity decreases. It is cooled by the heat absorption action of the refrigerant flowing through the adsorption heat exchanger (61,62) and the temperature also drops. In addition, the air passing through the adsorption heat exchanger (61,62), which is a condenser, is given moisture from the adsorbent of the adsorption heat exchanger (61,62) to increase the relative humidity and the adsorption heat. It is heated by the heat dissipation action of the refrigerant flowing through the exchanger (61,62) and the temperature also rises.

<Switching mechanism>
The switching mechanism (53) is an adsorption heat exchanger (61,62) in which the air (in this example, the outdoor air (OA)) taken into the humidity control unit (20) from the suction passage (P1) is an evaporator. ), While being supplied to the air supply passage (P2), the air taken into the humidity control unit (20) from the regeneration passage (P3) (in this example, the outdoor air (OA)) is the condenser. It is configured so that the air flow in the humidity control unit (20) can be switched so that it passes through the adsorption heat exchanger (61,62) and is discharged to the exhaust passage (P4).

Specifically, in the switching mechanism (53), the suction passage (P1), the first humidity control chamber (S51), and the air supply passage (P2) communicate with each other, while the regeneration passage (P3) and the second humidity control chamber (P3) communicate with each other. The first flow state (the state shown by the solid line in FIG. 1) in which the (S52) and the exhaust passage (P4) communicate with each other, the suction passage (P1), the second humidity control chamber (S52), and the air supply passage (P2). It is possible to switch to the second distribution state (the state shown by the broken line in FIG. 1) in which the regeneration passage (P3), the first humidity control chamber (S51), and the exhaust passage (P4) communicate with each other. Has been done.

As shown in FIG. 2, the switching mechanism (53) has first to eighth dampers (D1 to D8). The first damper (D1) opens and closes the communication passage that connects the suction passage (P1) and the first humidity control chamber (S51), and the second damper (D2) opens and closes the regeneration passage (P3) and the first humidity control. Open and close the passageway that communicates with the room (S51). The third damper (D3) opens and closes the communication passage that connects the regeneration passage (P3) and the second humidity control chamber (S52), and the fourth damper (D4) is the suction passage (P1) and the second humidity control. Open and close the passageway that communicates with the room (S52). The fifth damper (D5) opens and closes the communication passage that connects the first humidity control chamber (S51) and the air supply passage (P2), and the sixth damper (D6) is the first humidity control chamber (S51). Open and close the communication passage that communicates with the exhaust passage (P4). The 7th damper (D7) opens and closes the communication passage connecting the 2nd humidity control chamber (S52) and the exhaust passage (P4), and the 8th damper (D8) is supplied with the 2nd humidity control chamber (S52). Open and close the communication passage that communicates with the air passage (P2).

The 1st, 3rd, 5th and 7th dampers (D1, D3, D5, D7) are set to the open state, and the 2nd, 4th, 6th and 8th dampers (D2, D4, D6, D8) are set. When set to the closed state, the suction passage (P1), the first humidity control chamber (S51), and the air supply passage (P2) communicate with each other, and the regeneration passage (P3), the second humidity control chamber (S52), and the exhaust. It communicates with the passage (P4). As a result, the air flow in the humidity control unit (20) becomes the flow state indicated by the solid line arrow in FIG. 2 (that is, the first flow state shown by the solid line in FIG. 1).

On the other hand, the 2nd, 4th, 6th and 8th dampers (D2, D4, D6, D8) are set to the open state, and the 1st, 3rd, 5th and 7th dampers (D1, D3, D5, D7) are set. ) Is set to the closed state, the suction passage (P1), the second humidity control chamber (S52), and the air supply passage (P2) communicate with each other, and the regeneration passage (P3) and the first humidity control chamber (S51). And the exhaust passage (P4) communicate with each other. As a result, the air flow in the humidity control unit (20) becomes the flow state indicated by the broken line arrow in FIG. 2 (that is, the second flow state shown by the broken line in FIG. 1).

<Operation by humidity control unit>
With the above configuration, the humidity control unit (20) can alternately repeat the following first dehumidifying operation and second dehumidifying operation at predetermined time intervals. For example, in the humidity control unit (20), the first dehumidifying operation is performed for 5 minutes, and then the second dehumidifying operation is performed for 5 minutes.

<< 1st dehumidifying operation >>
In the first dehumidifying operation, the four-way switching valve (64) is set to the first communication state (the state shown by the solid line in FIG. 2), the refrigerant circuit (52) performs the first refrigeration cycle operation, and the switching mechanism (53). Sets the air flow in the humidity control unit (20) to the first flow state (flow state indicated by the solid arrow in FIG. 2). As a result, the air flowing through the suction passage (P1) flows into the first humidity control chamber (S51) and enters the first adsorption heat exchanger (61) which is an evaporator in the first humidity control chamber (S51). It passes through to dehumidify and cool, and then is supplied from the first humidity control chamber (S51) to the air supply passage (P2). On the other hand, the air flowing through the regeneration passage (P3) flows into the second humidity control chamber (S52) and passes through the second adsorption heat exchanger (62) which is a condenser in the second humidity control chamber (S52). The adsorbent of the second adsorption heat exchanger (62) is regenerated while being humidified and heated, and then discharged from the second humidity control chamber (S52) to the exhaust passage (P4).

<< Second dehumidifying operation >>
In the second dehumidifying operation, the four-way switching valve (64) is set to the second communication state (the state shown by the broken line in FIG. 2), the refrigerant circuit (52) performs the second refrigeration cycle operation, and the switching mechanism (53). Sets the air flow in the humidity control unit (20) to the second flow state (flow state indicated by the dashed arrow in FIG. 2). As a result, the air flowing through the suction passage (P1) flows into the second humidity control chamber (S52), and the second adsorption heat exchanger (62), which is an evaporator in the second humidity control chamber (S52), is moved. It passes through to dehumidify and cool, and then is supplied from the second humidity control chamber (S52) to the air supply passage (P2). On the other hand, the air flowing through the regeneration passage (P3) flows into the first humidity control chamber (S51) and passes through the first adsorption heat exchanger (61) which is a condenser in the first humidity control chamber (S51). Then, it is humidified and heated, and the adsorbent of the first adsorption heat exchanger (61) is regenerated, and then the adsorbent is discharged from the first humidity control chamber (S51) to the exhaust passage (P4).

[Adsorption member]
The suction member (21) is provided in the middle of the air supply passage (P2). In this example, the suction member (21) is provided in the air supply chamber (C2) provided in the middle of the air supply passage (P2), and the air in the air supply chamber (C2) is provided in the air supply chamber (C2). It is located downstream of the central position in the flow direction. In this example, the suction member (21) is arranged in the main passage portion (P21) located upstream of the branch passage portion (P22) in the air supply passage (P2).

Further, an adsorbent is supported on the adsorbent member (21). The adsorbing member (21) is configured to bring the air flowing through the air supply passage (P2) into contact with the adsorbent. For example, the suction member (21) is formed in a rectangular parallelepiped shape, and two main surfaces (wide side surfaces) facing each other are surfaces through which air passes. Specifically, the adsorption member (21) has a structure (specific example, a honeycomb structure) in which a large number of through holes penetrating from one of the two main surfaces to the other are formed.

[Air supply fan]
The air supply fan (22) is provided in the air supply passage (P2), and is provided from the inflow end (that is, the humidity control unit (20)) of the air supply passage (P2) to the outflow end (that is, that is) of the air supply passage (P2). It is configured to carry air toward the indoor space (S1)). In this example, the air supply fan (22) is arranged in the air supply passage (P2) on the upstream side in the air flow direction with respect to the suction member (21). Specifically, the air supply fan (22) is arranged between the humidity control unit (20) and the air supply chamber (C2) in the air supply passage (P2).

[Air supply filter]
The air supply filter (23) is provided in the air supply passage (P2) and is configured to capture dust and mold spores contained in the air flowing through the air supply passage (P2). In this example, the air supply filter (23) is arranged in the air supply passage (P2) on the downstream side in the air flow direction with respect to the suction member (21). Specifically, the air supply filter (23) is arranged between the air supply chamber (C2) and the air supply outlet (24) that opens into the indoor space (S1) in the air supply passage (P2). .. In this example, the air supply filter (23) is arranged in the main passage portion (P21) located upstream of the branch passage portion (P22) in the air supply passage (P2).

〔Heater〕
The heater (30) is provided in the auxiliary passage (P5) and is configured to heat the air flowing through the auxiliary passage (P5). For example, the heater (30) is configured by a heat exchanger that functions as a condenser in a refrigerant circuit (not shown).

[Auxiliary fan]
The auxiliary fan (31) is provided in the auxiliary passage (P5), and is provided from the inflow end of the auxiliary passage (P5) (in this example, the outside air chamber (C1)) to the outflow end of the auxiliary passage (P5) (in this example, the middle). It is configured to carry air towards the chamber (S2)). In this example, the auxiliary fan (31) is located downstream of the heater (30) in the auxiliary passage (P5) in the air flow direction. Specifically, the auxiliary fan (31) is arranged between the heater (30) and the intermediate air outlet (33) that opens into the intermediate chamber (S2) in the auxiliary passage (P5).

[Auxiliary filter]
The auxiliary filter (32) is provided in the auxiliary passage (P5) and is configured to capture dust and mold spores contained in the air flowing through the auxiliary passage (P5). In this example, the auxiliary filter (32) is arranged in the auxiliary passage (P5) on the downstream side in the air flow direction with respect to the suction member (21). Specifically, the air supply filter (23) is arranged between the air supply chamber (C2) and the air supply outlet (24) that opens into the indoor space (S1) in the air supply passage (P2). ..

[Flow path switching mechanism]
The flow path switching mechanism (40) is configured to allow or block the flow of air in each of the suction passage (P1), the regeneration passage (P3), and the auxiliary passage (P5). In this example, the flow path switching mechanism (40) has a suction damper (41), a regeneration damper (42), and an auxiliary damper (43). The suction damper (41) is provided in the suction passage (P1) and is configured to be able to open and close the suction passage (P1). The regeneration damper (42) is provided in the regeneration passage (P3) and is configured to be able to open and close the regeneration passage (P3). The auxiliary damper (43) is provided in the auxiliary passage (P5) and is configured to be able to open and close the auxiliary passage (P5). In this example, the auxiliary damper (43) is located upstream of the auxiliary filter (32) in the auxiliary passage (P5) in the air flow direction.

With the above configuration, the flow path switching mechanism (40) allows the air flow in the suction passage (P1) and the regeneration passage (P3), while blocking the air flow in the auxiliary passage (P5). It is configured to be switchable between the flow path state and the second flow path state that blocks the air flow in the suction passage (P1) and the regeneration passage (P3) while allowing the air flow in the auxiliary passage (P5). There is. Specifically, in the first flow path state, the suction damper (41) and the regeneration damper (42) are set to the open state, while the auxiliary damper (43) is set to the closed state, and in the second flow path state. , The suction damper (41) and the regeneration damper (42) are set to the closed state, while the auxiliary damper (43) is set to the open state.

[Various sensors]
Further, the dehumidification system (10) is provided with various sensors such as an outside air temperature sensor (71), an outside air humidity sensor (72), an indoor temperature sensor (73), and an indoor humidity sensor (74).

The outside air temperature sensor (71) and the outside air humidity sensor (72) are configured to detect the temperature and relative humidity of the outdoor air (OA), respectively. In this example, the outside air temperature sensor (71) and the outside air humidity sensor (72) are installed in the outside air chamber (C1) and the temperature and relative humidity of the air at the installation site are taken as the temperature and relative humidity of the outdoor air (OA). Detect each.

The indoor temperature sensor (73) and the indoor humidity sensor (74) are configured to detect the temperature and relative humidity of the indoor air (RA), respectively. In this example, the indoor temperature sensor (73) and indoor humidity sensor (74) are installed in the indoor space (S1), and the temperature and relative humidity of the air at the installation location are taken as the temperature and relative humidity of the indoor air (RA), respectively. To detect.

〔controller〕
The controller (70) is configured to control the operating operation of the dehumidifying system (10) based on the detection values of various sensors provided in the dehumidifying system (10). In this dehumidifying system, a dehumidifying operation and a heating operation are performed.

[Dehumidifying operation]
Next, the dehumidifying operation of the dehumidifying system (10) will be described with reference to FIG. This dehumidifying operation is preferably performed during a period when the temperature and relative humidity of the outdoor air (OA) are relatively high (for example, in the hot and humid summer). In the dehumidifying operation, the suction damper (41) and the regeneration damper (42) are set to the open state, and the auxiliary damper (43) is set to the closed state. Further, the humidity control unit (20) and the air supply fan (22) are set to the driving state, and the heater (30) and the auxiliary fan (31) are set to the stopped state.

In the dehumidifying operation, a part of the outdoor air (OA) taken into the outside air chamber (C1) passes through the suction passage (P1) and flows into the humidity control unit (20), and the rest is the regeneration passage (P3). ) And flows into the humidity control unit (20).

The air flowing into the humidity control unit (20) from the suction passage (P1) is dehumidified and cooled by passing through the adsorption heat exchanger (61,62) which is an evaporator in the humidity control unit (20). The air that has passed through the adsorption heat exchanger (61,62) that is the evaporator in the humidity control unit (20) (the air dehumidified in the humidity control unit (20)) flows out from the humidity control unit (20). It flows through the air supply passage (P2), passes through the air supply fan (22), and flows into the air supply chamber (C2). The air that has flowed into the air supply chamber (C2) passes through the adsorption member (21) in the air supply chamber (C2), and sudden fluctuations in relative humidity are suppressed. The air that has passed through the suction member (21) (the air whose relative humidity is suppressed from sudden fluctuations by the suction member (21)) flows out of the air supply chamber (C2) and flows through the air supply passage (P2). It passes through the air supply filter (23) and is blown out from the air supply outlet (24) into the indoor space (S1) as supply air (SA).

On the other hand, the air that has passed through the regeneration passage (P3) and has flowed into the humidity control unit (20) passes through the adsorption heat exchanger (61,62) that is a condenser in the humidity control unit (20) and is humidified. And as it is heated, the adsorbent of the adsorption heat exchanger (61,62) is regenerated. The air that has passed through the adsorption heat exchanger (61,62), which is the condenser in the humidity control unit (20) (the air used to regenerate the adsorbent in the humidity control unit (20)), is the humidity control unit (air). It flows out from 20), passes through the exhaust passage (P4), and is discharged to the outdoor space as exhaust air (EA) from the outflow end of the exhaust passage (P4).

[Heating operation]
Next, the heating operation of the dehumidifying system (10) will be described with reference to FIG. This heating operation is preferably performed during a period when the temperature and relative humidity of the outdoor air (OA) are relatively low (for example, in the cold and low humidity winter). In the heating operation, the auxiliary damper (43) is set to the open state, and the suction damper (41) and the regeneration damper (42) are set to the closed state. Further, the heater (30) and the auxiliary fan (31) are set to the driving state, and the humidity control unit (20) and the air supply fan (22) are set to the stopped state.

In the heating operation, the outdoor air (OA) taken into the outside air chamber (C1) flows into the auxiliary passage (P5). The air flowing into the auxiliary passage (P5) passes through the air supply filter (23) and then passes through the heater (30) to be heated. The air that has passed through the heater (30) (the air that has been heated in the heater (30)) passes through the auxiliary fan (31) and is blown out from the intermediate outlet (33) to the intermediate chamber (S2). The air blown into the intermediate chamber (S2) flows through the floor, sides, and ceiling of the intermediate chamber (S2) in order, and flows from the indoor outlet (34) into the indoor space (S1) as supply air (SA). It is blown out.

[Effect of the embodiment]
As described above, by providing the suction member (21) in the middle of the air supply passage (P2), the relative humidity of the air flowing out of the humidity control unit (20) and flowing through the air supply passage (P2) is sudden. Fluctuations can be suppressed. Specifically, the higher the relative humidity of the air passing through the adsorbing member (21), the larger the adsorbed amount (the amount of water that can be adsorbed) of the adsorbent of the adsorbing member (21) tends to be. Therefore, when the relative humidity of the air passing through the adsorbing member (21) suddenly increases, the amount of adsorbed agent adsorbed by the adsorbing member (21) increases, and as a result, the air passing through the adsorbing member (21) is contained. Moisture is adsorbed by the adsorbent of the adsorbing member (21) to dehumidify the air (air passing through the adsorbing member (21)). In this way, the suction member (21) can suppress sudden fluctuations in the relative humidity of the air (supply air (SA)) that flows out of the humidity control unit (20) and flows through the air supply passage (P2). Therefore, it is possible to suppress the humidity fluctuation of the supply air (SA) caused by the operation switching of the humidity control unit (20). Therefore, the relative humidity of the air in the indoor space (S1) (indoor air (RA)) can be stabilized.

Further, an air supply chamber (C2) is provided in the middle of the air supply passage (P2), and a suction member (21) is provided in the air supply chamber (C2). Since the cross section of the flow path of the air supply chamber (C2) is wider than the cross section of the flow path of the air supply passage (P2), the flow velocity of the air flowing through the air supply chamber (C2) can be reduced. .. As a result, the contact time between the air passing through the adsorbent member (21) and the adsorbent of the adsorbent member (21) can be lengthened, so that the sudden fluctuation of the relative humidity of the air in the adsorbent member (21) is sufficient. Can be suppressed. Further, since the residence time of air in the air supply chamber (C2) can be lengthened, the air can be sufficiently mixed in the air supply chamber (C2). Specifically, the hot and humid air supplied from the adsorption heat exchanger (61,62) immediately after switching from the condenser to the evaporator, and then the adsorption heat exchanger (becomes an evaporator). It can be mixed with low temperature and low humidity air supplied from the adsorption heat exchanger (61,62). In this way, the adsorption member (21) can sufficiently suppress sudden fluctuations in the relative humidity of the air, and the air supply chamber (C2) can sufficiently mix the air, so that the humidity control unit can be used. It is possible to improve the effect of suppressing the humidity fluctuation of the supply air (SA) caused by the operation switching of (20).

Further, by arranging the suction member (21) on the downstream side of the central position in the air flow direction of the air supply chamber (C2), the suction member (21) is sufficiently mixed in the air supply chamber (C2) and the relative humidity is made uniform. The air can be supplied to the adsorption member (21). As a result, the effect of suppressing the humidity fluctuation of the supply air (SA) caused by the operation switching of the humidity control unit (20) can be further improved.

In addition, by arranging the air supply fan (22) on the upstream side in the air flow direction from the air supply chamber (C2) in the air supply passage (P2), the internal pressure of the air supply chamber (C2) is made positive. Can be done. As a result, it is possible to suppress the intrusion of air from the outside of the air supply chamber (C2) into the inside of the air supply chamber (C2), so that the supply air (SA) caused by the air intrusion into the air supply chamber (C2) ) Humidity fluctuation can be suppressed.

Further, the outdoor air (OA) taken in from the outside is supplied to the humidity control unit (20), and the humidity control unit (20) uses the outdoor air (OA) supplied to the humidity control unit (20). It is configured to supply to each of the 1st and 2nd adsorption heat exchangers (61,62). As a result, air can be unilaterally supplied from the humidity control unit (20) to the indoor space (S1) without supplying the indoor air (RA) from the indoor space (S1) to the humidity control unit (20). Therefore, since the internal pressure of the indoor space (S1) can be made positive, it is possible to suppress the intrusion of air from the outside of the indoor space (S1) into the inside of the indoor space (S1), and the indoor space (S1) can be suppressed. ), The humidity fluctuation of the indoor air (RA) due to the intrusion of air can be suppressed.

When the flow path switching mechanism (40) is set to the first flow path state (in this example, the suction damper (41) and the regeneration damper (42) are set to the open state, and the auxiliary damper (43) is closed. When the state is set), the dehumidified air in the humidity control unit (20) passes through the adsorption member (21) and is supplied to the indoor space (S1). That is, by setting the flow path switching mechanism (40) to the first flow path state, the dehumidifying operation using the humidity control unit (20) can be performed. On the other hand, when the flow path switching mechanism (40) is set to the second flow path state (in this example, the suction damper (41) and the regeneration damper (42) are set to the closed state, and the auxiliary damper (43) is opened. When set to the state), the air heated in the heater (30) is supplied to the indoor space (S1). As a result, the temperature of the indoor air (RA) can be raised and the relative humidity of the indoor air (RA) can be lowered. That is, by setting the flow path switching mechanism (40) to the second flow path state, the heating operation using the heater (30) can be performed. In this way, it is possible to switch between the dehumidifying operation using the humidity control unit (20) and the heating operation using the heater (30).

In the heating operation, the air heated in the auxiliary passage (P5) flows through the floor, side, and ceiling of the intermediate chamber (S2) in order, and blows out from the indoor outlet (34) to the indoor space (S1). Will be done. As a result, the indoor space (S1) can be heated by the air (heated air) flowing through the intermediate chamber (S2), so that the temperature drop of the indoor air (RA) can be prevented, and as a result, the indoor space (RA) can be prevented from dropping. It is possible to prevent the indoor air (RA) from becoming highly humid due to the temperature drop of the air (RA).

(Modified example of dehumidifying system)
As shown in FIG. 5, the air supply fan (22) may be arranged on the downstream side of the suction member (21) in the air flow direction in the air supply passage (P2). In this example, the air supply fan (22) is located between the air supply chamber (C2) and the air supply filter (23) in the air supply passage (P2). In this example, the air supply fan (22) is arranged in the main passage portion (P21) located upstream of the branch passage portion (P22) in the air supply passage (P2).

As described above, by arranging the air supply fan (22) on the downstream side in the air flow direction from the air supply chamber (C2) in the air supply passage (P2), immediately after switching from the condenser to the evaporator. It is possible to prevent the hot and humid air supplied from the adsorption heat exchangers (61,62) from being supplied to the air supply fan (22) before passing through the adsorption member (21). As a result, it is possible to prevent the occurrence of malfunction of the air supply fan (22) (for example, dew on the air supply fan (22)) due to the supply of high temperature and high humidity air to the air supply fan (22). ..

(Other embodiments)
In the above explanation, the case where the intermediate room (S2) is provided around the indoor space (S1) is taken as an example, but the intermediate room (S2) is not directed around the indoor space (S1). May be good. In this case, the outflow end of the auxiliary passage (P5) will be connected to the intermediate air outlet (33) that opens into the indoor space (S1).

Further, the above embodiments may be combined as appropriate. The above embodiments are essentially preferred examples and are not intended to limit the scope of the invention, its applications, or its uses.

As described above, the above-mentioned dehumidifying system is useful as a dehumidifying system that dehumidifies air and supplies it to the indoor space.

10 Dehumidification system 20 Humidity control unit 21 Adsorption member 22 Air supply fan 30 Heater 31 Auxiliary fan 40 Flow path switching mechanism 51 Casing 52 Refrigerant circuit 53 Switching mechanism 61 1st adsorption heat exchanger 62 2nd adsorption heat exchanger 70 Controller S1 Indoor space S2 Intermediate room P1 Suction passage P2 Air supply passage P3 Regeneration passage P4 Exhaust passage P5 Auxiliary passage

Claims (5)

An air supply passage (P2) for supplying air to the indoor space (S1),
It has first and second adsorption heat exchangers (61,62) on which an adsorbent is carried, and the first adsorption heat exchanger (61) acts as an evaporator to dehumidify air and exchange the second adsorption heat. The first operation in which the container (62) acts as a condenser to regenerate the adsorbent, and the first adsorption heat exchanger (61) acts as a condenser to regenerate the adsorbent and the second adsorption heat exchanger (62). ) Alternately performs the second operation of dehumidifying the air as an evaporator, and among the first and second adsorption heat exchangers (61,62), the adsorption heat exchanger (61, 62) which is the evaporator. The humidity control unit (20) that supplies the air that has passed through 62) to the air supply passage (P2),
A suction member (21) provided in the middle of the air supply passage (P2), on which an adsorbent is supported, and which brings the air flowing through the air supply passage (P2) into contact with the adsorbent is provided.
An air supply chamber (C2) is provided in the middle of the air supply passage (P2).
The cross section of the flow path of the air supply chamber (C2) is wider than the cross section of the flow path of the air supply passage (P2).
The suction member (21) is provided in the air supply chamber (C2), and is arranged in the air supply chamber (C2) on the downstream side of the central position in the air flow direction of the air supply chamber (C2). A dehumidifying system characterized by being <br />. Oite to claim 1,
It is provided in the air supply passage (P2) and is equipped with an air supply fan (22) that conveys air from the humidity control unit (20) to the indoor space (S1).
The dehumidifying system characterized in that the air supply fan (22) is arranged in the air supply passage (P2) on the upstream side in the air flow direction with respect to the air supply chamber (C2). Oite to claim 1,
It is provided in the air supply passage (P2) and is equipped with an air supply fan (22) that conveys air from the humidity control unit (20) to the indoor space (S1).
The dehumidifying system characterized in that the air supply fan (22) is arranged in the air supply passage (P2) on the downstream side in the air flow direction with respect to the air supply chamber (C2). In any one of claims 1 to 3 ,
Outdoor air (OA) taken in from the outside is supplied to the humidity control unit (20).
The humidity control unit (20) is configured to supply the outdoor air (OA) supplied to the humidity control unit (20) to each of the first and second adsorption heat exchangers (61,62). A dehumidifying system characterized by being In any one of claims 1 to 4 ,
A suction passage (P1) for supplying air to the humidity control unit (20),
A regeneration passage (P3) for supplying air to the humidity control unit (20), and
Auxiliary passage (P5) for supplying air to the above indoor space (S1),
A heater (30) for heating the air flowing through the auxiliary passage (P5) and
Equipped with a flow path switching mechanism (40)
The humidity control unit (20) supplies the air supplied to the humidity control unit (20) from the suction passage ( P1 ) to the adsorption heat exchanger (61,62) which is the evaporator, and the above The air supplied from the regeneration passage (P3) to the humidity control unit (20) is configured to be supplied to the adsorption heat exchanger (61,62) which is the condenser.
The flow path switching mechanism (40) allows the flow of air in the suction passage (P1) and the regeneration passage (P3), while blocking the flow of air in the auxiliary passage (P5). And, it is possible to switch to a second flow path state that blocks the flow of air in the suction passage (P1) and the regeneration passage (P3) while allowing the flow of air in the auxiliary passage (P5). A dehumidifying system characterized by being present.

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