JP7425355B2 - Humidity control device - Google Patents

Description

The present disclosure relates to a humidity control device.

Conventionally, humidity control devices using adsorbents that adsorb moisture in the air have been known. When dehumidifying using a humidity control device, the air is dehumidified by adsorbing moisture contained in the air onto an adsorbent. The adsorbent that has absorbed moisture is regenerated by heating and used again for dehumidification. On the other hand, when humidifying with a humidity control device, moisture is adsorbed from moisture-containing air onto an adsorbent, and then the moisture is desorbed from the adsorbent by heating the adsorbent and supplied to the air to be humidified.

In the humidity control device disclosed in Patent Document 1, an adsorbent is supported on the surface of a heat exchanger, and the temperature of the heat exchanger is controlled so that the relative humidity range is such that the adsorbent can obtain the required amount of adsorption. are doing.

Japanese Patent Application Publication No. 2004-294048

However, adsorbents have different adsorption properties (adsorption isotherms) depending on the material, and conventional humidity control devices do not control the heat source in consideration of the adsorption properties of each adsorbent, so it is difficult to improve energy efficiency. There is room for improvement.

An object of the present disclosure is to improve the energy efficiency of a humidity control device using an adsorbent that adsorbs moisture in the air.

A first aspect of the present disclosure is a humidity control device (10, 110) using an adsorbent that adsorbs moisture in the air, the humidity control device controlling the temperature of the adsorbent or the relative humidity of the air supplied to the adsorbent. A control unit (95,140) is provided. In the adsorption isotherm of the adsorbent, a first range is less than the first relative humidity value, a second range is from the first relative humidity value to a second relative humidity value (>the first relative humidity value), and A third range is greater than the second relative humidity value, and a change in the water content of the adsorbent with respect to a change in relative humidity in the second range is a change in the moisture content of the adsorbent with respect to a change in relative humidity in the first range and the third range. is larger than the change in moisture content. The control unit (95, 140) causes moisture to be desorbed from the adsorbent near the first relative humidity value, and causes the adsorbent to adsorb moisture near the second relative humidity value.

In the first aspect, the control unit (95, 140) controls the temperature of the adsorbent or the relative humidity of the air supplied to the adsorbent, taking into account the adsorption characteristics of the adsorbent. Therefore, it is possible to suppress the range of temperature change of the heat source to achieve a relative humidity range in which the required amount of adsorption can be obtained in the adsorbent, and therefore energy efficiency can be improved.

In a second aspect of the present disclosure, in the first aspect, the slope of the adsorption isotherm of the adsorbent in the second range is the slope of the adsorption isotherm of the adsorbent in the first range and the third range. It is more than 5 times the slope of .

In the second aspect, energy efficiency can be further improved.

In a third aspect of the present disclosure, in the first or second aspect, the amount of change in the water content of the adsorbent in the second range is 50% or more of the maximum water content of the adsorbent.

In the third aspect, energy efficiency can be further improved.

In a fourth aspect of the present disclosure, in any one of the first to third aspects, the difference between the second relative humidity value and the first relative humidity value is 40% or less.

In the fourth aspect, energy efficiency can be further improved.

In a fifth aspect of the present disclosure, in any one of the first to fourth aspects, the vicinity of the first relative humidity value is in a range from the first relative humidity value to -10%, The vicinity of the second relative humidity value ranges from the second relative humidity value to +10%.

In the fifth aspect, it is possible to control the heat source in consideration of the adsorption characteristics of the adsorbent, so it is possible to suppress a decrease in energy efficiency.

In a sixth aspect of the present disclosure, in any one of the first to fifth aspects, the adsorbent is composed of a metal-organic structure.

In the sixth aspect, an adsorbent having desired adsorption properties can be obtained.

A seventh aspect of the present disclosure is an adsorption/desorption unit according to any one of the first to sixth aspects, which includes the adsorbent and adsorbs moisture in the processing air and desorbs the adsorbed moisture. (81, 82, 115A, 115B), a heat source (51, 52, 123, 133) for adjusting the relative humidity at which the adsorption/desorption section (81, 82, 115A, 115B) adsorbs and desorbs moisture, and an airflow of the treated air. The control unit (95, 140) further includes a fan (25, 26, 124, 134) that controls the temperature and humidity data of the treated air, and an acquisition unit (91, 92, 93, 94, 121, 131) that acquires temperature and humidity data of the treated air. , 92, 93, 94, 121, 131) controls the temperature of the heat source (51, 52, 123, 133) based on the temperature and humidity data acquired.

In the seventh aspect, it is possible to control the temperature of the heat source to achieve a relative humidity range in which the required amount of adsorption can be obtained in the adsorbent.

In an eighth aspect of the present disclosure, in the seventh aspect, the adsorption isotherm of the adsorbent includes an adsorption line when adsorbing moisture and a desorption line when desorbing the adsorbed moisture. , the adsorption/desorption unit (81, 82, 115A, 115B) includes an adsorption unit (81, 82, 115A, 115B) that adsorbs moisture in the treated air, and a desorption unit (81, 82, 115A, 115B) that desorbs the adsorbed moisture. 82,115A,115B), and the heat source (51,52,123,133) includes a first heat source (51,52,123,133) that adjusts the relative humidity at which the adsorption section (81,82,115A,115B) adsorbs moisture; The desorption unit (81, 82, 115A, 115B) includes a second heat source (51, 52, 123, 133) that adjusts the relative humidity at which water is desorbed, and the control unit (95, 140) The temperature of the second heat source (51, 52, 123, 133) is controlled so that moisture is desorbed from the desorption section (81, 82, 115A, 115B) in the vicinity of 1 relative humidity value, and the The temperature of the first heat source (51, 52, 123, 133) is controlled so that the adsorption section (81, 82, 115A, 115B) adsorbs moisture near the 2 relative humidity value.

In the eighth aspect, moisture can be desorbed from the adsorbent of the desorption section (81, 82, 115A, 115B) near the first relative humidity value, and the moisture can be desorbed from the adsorption material of the adsorption section (81, 82, 115A, 115B) near the second relative humidity value. 81, 82, 115A, 115B) can absorb moisture.

A ninth aspect of the present disclosure is that in the eighth aspect, when dehumidifying the room, the control unit (95, 140) supplies first processed air from the outdoors into the room and exhausts the first processed air from the room to the outdoors. Based on the temperature and humidity data of the second treated air, the relative humidity of the first treated air that reaches the adsorption section (81, 82, 115A, 115B) is determined to be a value near the second relative humidity value on the adsorption line. The temperature of the first heat source (51, 52, 123, 133) is lowered so that the relative humidity of the second treated air reaching the desorption section (81, 82, 115A, 115B) is By controlling the temperature of the second heat source (51, 52, 123, 133) to be raised so as to have a value near 1 relative humidity value, the first treated air is supplied into the room as dehumidified air, and the second The treated air is converted into high-humidity air and exhausted outside.

In the ninth aspect, energy efficiency when dehumidifying a room is improved.

A tenth aspect of the present disclosure is that in the eighth or ninth aspect, when humidifying the room, the control unit (95, 140) controls the first processed air to be exhausted from the room to the outdoors and the first processed air to be exhausted from the outdoors to the room. Based on the temperature and humidity data of the second processed air to be supplied, the relative humidity of the second processed air that reaches the desorption section (81, 82, 115A, 115B) is determined to be the first relative humidity value at the desorption line. While increasing the temperature of the second heat source (51, 52, 123, 133) so that the temperature of the second heat source (51, 52, 123, 133) has a value close to By lowering the temperature of the first heat source (51, 52, 123, 133) so that it has a value close to the second relative humidity value at The air is made into low-humidity air and exhausted outside.

In the tenth aspect, energy efficiency when humidifying a room is improved.

An eleventh aspect of the present disclosure is that in any one of the eighth to tenth aspects, the first heat source (51, 52) and the second heat source (51, 52) constitute a heat pump, and the The control unit (95) controls the temperature of the first heat source (51, 52) and the temperature of the second heat source (51, 52) in conjunction with each other.

In the eleventh aspect, energy efficiency can be further improved.

A twelfth aspect of the present disclosure is that in any one of the eighth to tenth aspects, the first heat source (123, 133) and the second heat source (123, 133) do not constitute a heat pump, and the control unit (140) independently controls the temperature of the first heat source (123, 133) and the temperature of the second heat source (123, 133).

In the twelfth aspect, the configuration of the humidity control device (110) can be simplified.

FIG. 1 is a diagram illustrating the adsorption characteristics of an adsorbent used in a humidity control device according to an embodiment. FIG. 2 is a diagram showing the adsorption characteristics of an adsorbent of a comparative example. FIG. 3 is a schematic cross-sectional view of a building showing the installation state of the humidity control device according to the first embodiment. FIG. 4 is a plan view, a right side view, and a left side view showing a schematic structure of the humidity control device according to the first embodiment. FIG. 5 is a piping system diagram showing the configuration of the refrigerant circuit in the humidity control device according to the first embodiment, in which (A) shows the flow of the refrigerant during the first operation, and (B) shows the flow of the refrigerant during the second operation. Shows the flow of refrigerant. FIG. 6 is a block diagram showing the configuration of the control section of the humidity control device according to the first embodiment. FIG. 7 is a schematic plan view, right side view, and left side view showing the flow of air during the first operation of the dehumidifying operation in the humidity control device according to the first embodiment. FIG. 8 is a schematic plan view, right side view, and left side view showing the flow of air during the second operation of the dehumidifying operation in the humidity control device according to the first embodiment. FIG. 9 is a schematic plan view, right side view, and left side view showing the flow of air during the first humidifying operation in the humidity control device according to the first embodiment. FIG. 10 is a schematic plan view, right side view, and left side view showing the flow of air during the second humidification operation in the humidity control device according to the first embodiment. FIG. 11 is a schematic plan view, right side view, and left side view showing the flow of air during the first operation of ventilation operation in the humidity control device according to the first embodiment. FIG. 12 is a schematic plan view, right side view, and left side view showing the flow of air during the second operation of the ventilation operation in the humidity control device according to the first embodiment. FIG. 13 is a flow diagram showing control processing of the humidity control device according to the first embodiment. FIG. 14 is a schematic configuration diagram of a humidity control device according to the second embodiment. FIG. 15 is a flow diagram showing control processing of the humidity control device according to the second embodiment.

Embodiments of the present disclosure will be described below with reference to the accompanying drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications, or its uses.

(Embodiment 1)
The humidity control device (10) according to the first embodiment dehumidifies or humidifies a target space using an adsorbent that adsorbs moisture in the air. The humidity control device (10) controls the temperature of the adsorbent or the relative humidity of the air supplied to the adsorbent, taking into account the adsorption properties of the adsorbent.

<Adsorbent>
The adsorbent used in the humidity control device (10) of this embodiment has a so-called S-shaped adsorption characteristic (adsorption isotherm) as shown in FIG. 1, for example. The adsorption isotherm shown in FIG. 1 includes an adsorption line when moisture is adsorbed and a desorption line when the adsorbed moisture is desorbed.

In the adsorption isotherm shown in Figure 1, the first range (I) is less than the first relative humidity value (RH1), and the first range (I) is greater than or equal to the first relative humidity value (RH1) and less than or equal to the second relative humidity value (RH2) (RH2>RH1). is the second range (II), and the value exceeding the second relative humidity value (RH2) is the third range (III), then the change in the water content of the adsorbent with respect to the change in relative humidity in the second range (II) is It is larger than the change in moisture content of the adsorbent with respect to the change in relative humidity in the first range (I) and the third range (III). In addition, "water content" means the mass of water (unit: g/g) that 1 g of adsorbent can contain.

The humidity control device (10) of the present embodiment is arranged in the vicinity of the first relative humidity value (RH1), for example in the range of (RH1-10%) to (RH1), preferably in the range of (RH1-5%) to (RH1). Moisture is desorbed from the adsorbent within a range, more preferably within a range of (RH1-3%) to (RH1).

The humidity control device (10) of the present embodiment is configured to operate in the vicinity of the second relative humidity value (RH2), for example in the range of (RH2) to (RH2+10%), preferably in the range of (RH2) to (RH2+5%). Allow the adsorbent to adsorb moisture within a range, more preferably within a range of (RH2) to (RH2+3%).

In the adsorbent used in the humidity control device (10) of this embodiment, the slope of the adsorption isotherm in the second range (II) is the slope of the adsorption isotherm in the first range (I) and the third range (III). It is preferable that it is 5 times or more.

In the adsorbent used in the humidity control device (10) of the present embodiment, the amount of change ΔW in the water content in the second range (II) is preferably 50% or more of the maximum water content of the adsorbent. Moreover, it is preferable that the amount of change ΔW in the water content in the second range (II) is 0.3 g or more.

In the adsorbent used in the humidity control device (10) of this embodiment, the difference between the second relative humidity value (RH2) and the first relative humidity value (RH1) is preferably 40% or less.

By using an adsorbent having S-shaped adsorption characteristics as described above, the range of relative humidity in which the adsorbent adsorbs and desorbs (regenerates) water becomes narrower. This makes it possible to reduce the temperature change width of the heat source required to achieve the relative humidity range, thereby improving energy efficiency.

On the other hand, when using a comparative example adsorbent with linear adsorption characteristics as shown in FIG. 2, for example, the relative humidity range ΔRH (lower limit RH1' to Since the upper limit RH2') is wide, the necessary temperature change range of the heat source becomes large, resulting in poor energy efficiency.

The adsorbent used in the humidity control device (10) of this embodiment is not particularly limited as long as it has S-shaped adsorption characteristics as shown in FIG. By configuring the adsorbent with mesoporous silica or the like supporting metal nanoparticles, desired adsorption characteristics can be easily achieved.

<Configuration of humidity control device>
As shown in FIG. 3, the humidity control device (10) of this embodiment controls the humidity of the indoor space (200) and ventilates the indoor space (200). The humidity control device (10) adjusts the humidity of the outdoor air (OA) that it draws in and supplies it to the indoor space (200), and at the same time discharges the indoor air (RA) that it draws into the outdoor space (201).

The humidity control device (10) may be installed in a building together with an air conditioner (150), as shown in FIG. The air conditioner (150) includes an outdoor unit (152) and an indoor unit (151), and selectively performs cooling operation and heating operation. The humidity control device (10) is connected via a duct (102, 103) to an indoor space (200) from which an indoor unit (151) of an air conditioner (150) blows air. Specifically, the humidity control device (10) is connected to the indoor space (200) via an air supply duct (102) and an inside air suction duct (103), and is connected to the indoor space (200) through an exhaust duct (101) and an outside air suction duct (104). It is connected to the outdoor space (201) via.

The humidity control device (10) will be described in detail with reference to FIG. 4. In addition, "top", "bottom", "left", "right", "front", "rear", "front" and "back" used in the following explanations refer to the humidity control device (10) when viewed from the front side, unless otherwise specified. It means the direction when

The humidity control device (10) includes a casing (11). A refrigerant circuit (50), which will be described later, is housed within the casing (11). A first adsorption heat exchanger (51), a second adsorption heat exchanger (52), a compressor (53), a four-way switching valve (54), and an electric expansion valve (55) are connected to the refrigerant circuit (50). be done. The refrigerant circuit (50) constitutes a heat pump.

The casing (11) is formed into a rectangular parallelepiped shape that is somewhat flat and relatively low in height. The casing (11) is formed with an outside air suction port (24), an inside air suction port (23), an air supply port (22), and an exhaust port (21). The outside air suction duct (104) is connected to the outside air suction port (24), the inside air suction duct (103) is connected to the inside air suction port (23), the supply air duct (102) is connected to the air supply port (22), and the (21) are connected to exhaust ducts (101), respectively.

The outside air suction port (24) and the inside air suction port (23) are provided on the back panel portion (13) of the casing (11). The outside air suction port (24) is provided in the lower part of the back panel portion (13). The inside air suction port (23) is provided in the upper part of the back panel part (13). The air supply port (22) is provided in the first side panel portion (14) of the casing (11). In the first side panel section (14), the air supply port (22) is arranged near the end of the casing (11) on the front panel section (12) side. The exhaust port (21) is provided in the second side panel portion (15) of the casing (11). In the second side panel section (15), the exhaust port (21) is arranged near the end on the front panel section (12) side.

The internal space of the casing (11) is provided with an upstream partition plate (71), a downstream partition plate (72), and a central partition plate (73). These partition plates (71 to 73) are installed in an upright state on the bottom plate of the casing (11), and partition the internal space of the casing (11) from the bottom plate to the top plate of the casing (11).

The upstream partition plate (71) and the downstream partition plate (72) are arranged parallel to the front panel part (12) and the back panel part (13), and are spaced apart from each other by a predetermined distance in the front-rear direction of the casing (11). Placed. The upstream partition plate (71) is arranged closer to the back panel portion (13). The downstream partition plate (72) is arranged closer to the front panel section (12). The arrangement of the central partition plate (73) will be described later.

Inside the casing (11), the space between the upstream partition plate (71) and the back panel section (13) is divided into two spaces, an upper and lower space, with the upper space forming the inside air passage (32). , the lower space constitutes an outside air passageway (34). The inside air side passage (32) communicates with the indoor space (200) via a duct connected to the inside air suction port (23). The outside air side passage (34) communicates with the outdoor space (201) via a duct connected to the outside air suction port (24).

An inside air side filter (27), an inside air temperature sensor (91), and an inside air humidity sensor (92) are installed in the inside air side passage (32). The inside air filter (27) removes dust and the like from the air passing through it. The inside air temperature sensor (91) measures the temperature of the indoor air flowing through the inside air side passage (32). The indoor air humidity sensor (92) measures the relative humidity of indoor air flowing through the indoor air passageway (32).

An outside air filter (28), an outside air temperature sensor (93), and an outside air humidity sensor (94) are installed in the outside air side passage (34). The outside air filter (28) removes dust and the like from the air passing through it. The outside air temperature sensor (93) measures the temperature of the outdoor air flowing through the outside air passageway (34). The outside air humidity sensor (94) measures the relative humidity of the outdoor air flowing through the outside air side passageway (34).

The inside air temperature sensor (91), the inside air humidity sensor (92), the outside air temperature sensor (93), and the outside air humidity sensor (94) constitute an acquisition unit that acquires temperature and humidity data of the processed air. Note that in FIGS. 7 to 12, which will be described later, illustrations of an inside air temperature sensor (91), an inside air humidity sensor (92), an outside air temperature sensor (93), and an outside air humidity sensor (94) are omitted.

The space between the upstream partition plate (71) and the downstream partition plate (72) in the casing (11) is partitioned left and right by a central partition plate (73), and the space on the right side of the central partition plate (73) constitutes the first heat exchanger chamber (37), and the space on the left side of the central partition plate (73) constitutes the second heat exchanger chamber (38). The first heat exchanger chamber (37) accommodates a first adsorption heat exchanger (51) that becomes an adsorption/desorption section (adsorption section or desorption section) (81). The second heat exchanger chamber (38) accommodates a second adsorption heat exchanger (52) that becomes an adsorption/desorption section (adsorption section or desorption section) (82). The electric expansion valve (55) (see FIG. 5) of the refrigerant circuit (50) is accommodated in the first heat exchanger chamber (37).

Each adsorption/desorption unit (81, 82) may be a so-called cross-fin type fin-and-tube heat exchanger with the above-mentioned adsorbent supported on the surface thereof. Each adsorption/desorption unit (81, 82) adsorbs moisture in the treated air and desorbs the adsorbed moisture. Each adsorption heat exchanger (51, 52) functions as a heat source (first heat source or second heat source) that adjusts the relative humidity at which each adsorption/desorption unit (81, 82) adsorbs and desorbs moisture.

Each adsorption heat exchanger (51, 52) may be formed in the shape of a rectangular thick plate or a flat rectangular parallelepiped as a whole. Each adsorption heat exchanger (51, 52) is placed in the heat exchanger room (37, 38) with its front and back surfaces parallel to the upstream partition plate (71) and downstream partition plate (72). It may be installed in an upright position.

In the internal space of the casing (11), the space along the front of the downstream partition plate (72) is divided into upper and lower parts, and the upper part of this vertically partitioned space is the air supply passageway ( 31), and the lower part constitutes the exhaust side passage (33).

The upstream partition plate (71) is provided with four dampers (41) to (44) that can be opened and closed. Each of the dampers (41) to (44) is formed into a generally horizontally long rectangular shape. Specifically, in the part (upper part) of the upstream partition plate (71) facing the internal air passageway (32), the first internal air damper (41) is attached to the right side of the central partition plate (73). A second internal air side damper (42) is attached to the left side of the central partition plate (73). In addition, in the part (lower part) of the upstream partition plate (71) facing the fresh air passageway (34), a first fresh air damper (43) is attached to the right side of the central partition plate (73), A second outside air side damper (44) is attached to the left side of the central partition plate (73). Four dampers (41) to (44) provided on the upstream partition plate (71) constitute a switching mechanism (40) that switches the air flow path.

The downstream partition plate (72) is provided with four openable/closable dampers (45) to (48). Each of the dampers (45) to (48) is formed into a generally horizontally long rectangular shape. Specifically, in the part (upper part) of the downstream partition plate (72) facing the air supply passageway (31), the first air supply damper (45) is located to the right of the central partition plate (73). is attached, and a second air supply side damper (46) is attached to the left side of the center partition plate (73). Further, in the part (lower part) of the downstream partition plate (72) facing the exhaust side passageway (33), a first exhaust damper (47) is attached to the right side of the central partition plate (73), A second exhaust side damper (48) is attached to the left side of the central partition plate (73). Four dampers (45) to (48) provided on the downstream partition plate (72) constitute a switching mechanism (40) that switches the air flow path.

Inside the casing (11), the space between the air supply side passage (31), the exhaust side passage (33), and the front panel section (12) is partitioned left and right by a partition plate (77). The space on the right side of (77) constitutes an air supply fan chamber (36), and the space on the left side of partition plate (77) constitutes an exhaust fan chamber (35).

The air supply fan (26) is housed in the air supply fan chamber (36). Further, an exhaust fan (25) is housed in the exhaust fan chamber (35). The air supply fan (26) and the exhaust fan (25) are centrifugal multi-blade fans (so-called sirocco fans). The air supply fan (26) blows air sucked in from the downstream partition plate (72) side to the air supply port (22). The exhaust fan (25) blows air sucked in from the downstream partition plate (72) side to the exhaust port (21).

The air supply fan chamber (36) accommodates a compressor (53) of the refrigerant circuit (50) and a four-way switching valve (54) (see FIG. 5). The compressor (53) and the four-way switching valve (54) are arranged between the air supply fan (26) and the partition plate (77) in the air supply fan room (36).

In addition, the humidity control device (10) of the present embodiment is provided with a ventilation passageway (85) that connects the outside air side passageway (34) and the air supply fan room (36). The ventilation passage (85) is opened and closed by a first ventilation damper (86) on the outside air intake port (24) side and a second ventilation damper (87) on the air supply port (22) side. An electrical component box (88) is provided on the front panel section (12) side of the casing (11), and includes a control board, a power supply board, etc., on which a controller (control unit) (95) to be described later is mounted. In addition, in FIG. 4 and FIGS. 7 to 12 described later, the ventilation passageway (85), dampers (86), (87), and electrical equipment box (88) are shown only in the (plan view) for simplicity. ing.

<Refrigerant circuit configuration>
As shown in FIG. 5, the refrigerant circuit (50) includes a first adsorption heat exchanger (51), a second adsorption heat exchanger (52), a compressor (53), a four-way switching valve (54), and an electric expansion It is a closed circuit equipped with a valve (55). The refrigerant circuit (50) performs a vapor compression refrigeration cycle by circulating filled refrigerant. Although not shown, a plurality of temperature sensors and pressure sensors are attached to the refrigerant circuit (50).

In the refrigerant circuit (50), the discharge pipe of the compressor (53) is connected to the first port of the four-way switching valve (54), and the suction pipe of the compressor (53) is connected to the second port of the four-way switching valve (54). connected to the port. In the refrigerant circuit (50), the first adsorption heat exchanger (51), the electric expansion valve (55), and the second adsorption heat exchanger are installed in order from the third port to the fourth port of the four-way switching valve (54). An exchanger (52) is arranged.

The four-way switching valve (54) has a first state (the state shown in FIG. 5A) 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 to be switchable to a second state (the state shown in FIG. 12B) in which the first port and the fourth port communicate with each other, and the second port and the third port communicate with each other.

The compressor (53) is a completely hermetic compressor in which a compression mechanism and an electric motor that drives it are housed in the same casing. The electric motor of this compressor (53) is supplied with alternating current via an inverter. When the output frequency of the inverter (that is, the operating frequency of the compressor (53)) is changed, the rotation speed of the electric motor and the compression mechanism driven by it changes, and the operating capacity of the compressor (53) changes. Increasing the rotational speed of the compression mechanism increases the operating capacity of the compressor (53), and decreasing the rotational speed of the compression mechanism reduces the operating capacity of the compressor (53).

<Controller configuration>
The humidity control device (10) is provided with a controller (control unit) (95) shown in FIG. 6. The controller (95) may be configured using, for example, a microcomputer and a memory device that stores software for operating the microcomputer. Measured values from the inside air humidity sensor (92), inside air temperature sensor (91), outside air humidity sensor (94), and outside air temperature sensor (93) are input to the controller (95). Measured values from a temperature sensor and a pressure sensor provided in the refrigerant circuit (50) are input to the controller (95). The controller (95) includes a signal indicating the operating status of the air conditioner (150), such as a signal indicating whether the air conditioner (150) is operating or not, and a signal indicating whether the air conditioner (150) is operating in cooling mode. A signal indicating whether it is in heating mode or heating mode is input. The controller (95) controls the operation of the humidity control device (10) based on these input measurement values and signals. That is, the controller (95) controls each damper (41) to (48), (86), (87), each fan (25), (26), compressor (53), electric expansion valve (55), and Controls the operation of the four-way switching valve (54).

Further, as shown in FIG. 6, the controller (95) includes a compressor control section (96) and an operation mode determination section (97). The compressor control unit (96) sets a target value of the operating frequency of the compressor (53) based on the measured values of the sensors (91) to (94) described above. The operation mode determination unit (97) determines the operation mode of the humidity control device (10) based on the measured values of the sensors (91) to (94) mentioned above, signals indicating the operation status of the air conditioner (150), etc. Determine the appropriate operation.

Furthermore, the controller (95) controls the temperature of the adsorbent supported by each adsorption/desorption unit (81, 82) or the relative humidity of the air supplied to the adsorbent. Specifically, the controller (95) controls each temperature and humidity based on the temperature and humidity data acquired by the inside air humidity sensor (92), inside air temperature sensor (91), outside air humidity sensor (94), and outside air temperature sensor (93). The temperature of the adsorption/desorption section (81, 82), that is, each adsorption heat exchanger (51, 52) is controlled to desorb moisture from the adsorbent near the first relative humidity value (RH1), and the second relative humidity value (RH1) is controlled. The adsorbent absorbs moisture near the humidity value (RH2).

In addition, when a heat pump is configured by the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52), the controller (95) controls the temperature of the first adsorption heat exchanger (51) and the second adsorption heat exchanger. The temperature of the exchanger (52) is controlled in conjunction.

<Driving operation>
The humidity control device (10) of this embodiment selectively performs a dehumidification operation, a humidification operation, a cooling operation, a heating operation, and a ventilation operation. The dehumidification operation and the humidification operation are humidity control operations aimed at adjusting the absolute humidity of outdoor air supplied to the indoor space (200). In other words, the dehumidification operation and the humidification operation are operations mainly for processing the latent heat load (dehumidification load or humidification load) of the indoor space (200). The cooling operation and the heating operation are sensible heat treatment operations aimed at adjusting the temperature of outdoor air supplied to the indoor space (200). In other words, the cooling operation and the heating operation are operations mainly for processing the sensible heat load (cooling load or heating load) of the indoor space (200). The ventilation operation is an operation for only ventilating the indoor space (200).

In each of dehumidification operation, humidification operation, cooling operation, heating operation, and ventilation operation, the air supply fan (26) and exhaust fan (25) operate, and the four-way switching valve (54) and each damper (41) - For (48), (86), and (87), operation switching is performed at fixed time intervals. The humidity control device (10) supplies the inhaled outdoor air (OA) to the indoor space (200) as supply air (SA), and supplies the inhaled indoor air (RA) to the outdoor space (201) as exhaust air (EA). discharge to.

If the adsorption isotherm of the adsorbent used in the humidity control device (10) includes an adsorption line for adsorbing moisture and a desorption line for desorbing the adsorbed moisture, as shown in Figure 1, the controller (95) controls the temperature of the adsorption heat exchanger (51, 52) so that water is desorbed from the desorption section (81, 82) near the first relative humidity value (RH1) at the desorption line, and The temperature of the adsorption heat exchanger (51, 52) may be controlled so that the adsorption unit (81, 82) adsorbs moisture near the second relative humidity value (RH2) at the adsorption line.

Hereinafter, the dehumidification operation, humidification operation, and ventilation operation performed by the humidity control device (10) will be explained in detail.

[Dehumidification operation]
In the humidity control device (10) during dehumidification operation, outdoor air is sucked into the casing (11) from the outside air suction port (24) as the first treated air, and indoor air is sucked into the casing (11) from the inside air suction port (23). The air is drawn into the air as secondary treated air. In the refrigerant circuit (50), the compressor (53) is operated and the opening degree of the electric expansion valve (55) is adjusted. During the dehumidifying operation, the humidity control device (10) alternately repeats a first operation and a second operation, which will be described later, for example, for 3 minutes each. In other words, in the dehumidifying operation, the first predetermined time, which is the duration of the first operation and the second operation, is set to 3 minutes.

In the first operation of the dehumidification operation shown in FIG. 7, the second adsorption heat exchanger (52) operates as an evaporator, and the adsorption/desorption section (adsorption section) (82) It adsorbs dehumidified air and supplies (SA) the dehumidified air into the room. In addition, the first adsorption heat exchanger (51) operates as a condenser, and the adsorption/desorption unit (desorption unit) (81) desorbs moisture into the second treated air (RA) to transport high-humidity air outdoors. Exhaust (EA).

In the second operation of the dehumidification operation shown in FIG. 8, the air flow path is switched by the four-way switching valve (54) and each damper (41 to 48), and the first adsorption heat exchanger (51) operates as an evaporator. , an adsorption/desorption unit (desorption unit) (81) adsorbs moisture in the first treated air (OA) and supplies dehumidified air (SA) into the room. In addition, the second adsorption heat exchanger (52) operates as a condenser, and the adsorption/desorption unit (adsorption unit) (82) desorbs moisture into the second treated air (RA) to send high-humidity air outdoors. Exhaust (EA).

Specifically, as shown in FIG. 7, in the first operation of the dehumidifying operation, the switching mechanism (40) sets the air circulation path to the second path. Specifically, the first inside air side damper (41), the second outside air side damper (44), the second air supply side damper (46), and the first exhaust side damper (47) are in the open state, and the second inside air side damper (47) is opened. The side damper (42), the first outside air damper (43), the first air supply damper (45), and the second exhaust damper (48) are in the closed state. During this first operation, the four-way switching valve (54) is set to the first state (the state shown in FIG. 5A). A refrigeration cycle is performed in the refrigerant circuit (50), the first adsorption heat exchanger (51) functions as a condenser (radiator), and the second adsorption heat exchanger (52) functions as an evaporator.

The first treated air (OA) that has flowed into the outside air side passageway (34) flows into the second heat exchanger chamber (38) through the second outside air side damper (44), and then flows into the second adsorption heat exchanger chamber (38). Pass through (52). In the second adsorption heat exchanger (first heat source) (52), that is, the adsorption/desorption section (adsorption section) (82), the moisture in the first treated air is adsorbed by the adsorbent, and the adsorption heat generated at that time is Heat is absorbed by the refrigerant. In addition, in the second adsorption heat exchanger (52), the temperature of the first treated air decreases somewhat. The first processed air dehumidified in the suction part (82) flows into the air supply side passage (31) through the second air supply side damper (46), and after passing through the air supply fan chamber (36), the air is supplied to the air supply side. It is supplied (SA) to the indoor space (200) through the port (22).

On the other hand, the second treated air (RA) that has flowed into the inside air side passage (32) flows into the first heat exchanger chamber (37) through the first inside air side damper (41), and then the first adsorption heat Pass through the exchanger (51). In the first adsorption heat exchanger (second heat source) (51), that is, the adsorption/desorption section (desorption section) (81), moisture is desorbed from the adsorbent heated by the refrigerant, and this desorbed moisture is transferred to the second adsorption heat exchanger (second heat source) (51). Added to treated air. The second treated air added with moisture in the desorption part (81) flows into the exhaust side passageway (33) through the first exhaust side damper (47), and after passing through the exhaust fan chamber (35) (21) and is discharged (EA) to the outdoor space (201).

Further, as shown in FIG. 8, in the second operation of the dehumidifying operation, the switching mechanism (40) sets the air circulation path to the first path. Specifically, the second inside air side damper (42), the first outside air side damper (43), the first air supply side damper (45), and the second exhaust side damper (48) are in the open state, and the first inside air side damper (43) is in an open state. The damper (41), the second outside air damper (44), the second air supply damper (46), and the first exhaust damper (47) are in a closed state. During this second operation, the four-way switching valve (54) is set to the second state (the state shown in FIG. 5(B)). A refrigeration cycle is performed in the refrigerant circuit (50), the second adsorption heat exchanger (52) functions as a condenser (radiator), and the first adsorption heat exchanger (51) functions as an evaporator.

The first treated air (OA) that has flowed into the outside air side passageway (34) flows into the first heat exchanger chamber (37) through the first outside air side damper (43), and then flows into the first adsorption heat exchanger chamber (37). Pass through (51). In the first adsorption heat exchanger (first heat source) (51), that is, the adsorption/desorption section (adsorption section) (81), moisture in the first treated air is adsorbed by the adsorbent, and the adsorption heat generated at that time is Heat is absorbed by the refrigerant. In the first adsorption heat exchanger (51), the temperature of the first treated air decreases somewhat. The first processed air dehumidified in the suction part (81) flows into the air supply passageway (31) through the first air supply side damper (45), and after passing through the air supply fan chamber (36), the air is It is supplied (SA) to the indoor space (200) through the port (22).

On the other hand, the second treated air (RA) that has flowed into the inside air side passageway (32) flows into the second heat exchanger chamber (38) through the second inside air side damper (42), and then receives the second adsorption heat. Pass through the exchanger (52). In the second adsorption heat exchanger (second heat source) (52), that is, the adsorption/desorption section (desorption section) (82), moisture is desorbed from the adsorbent heated by the refrigerant, and this desorbed moisture is transferred to the second adsorption heat exchanger (second heat source) (52). Added to treated air. The second processed air added moisture in the desorption part (82) flows into the exhaust side passageway (33) through the second exhaust side damper (48), and after passing through the exhaust fan chamber (35) (21) and is discharged (EA) to the outdoor space (201).

In the dehumidifying operation described above, the controller (95) measures the temperature and humidity data (measured by each sensor (91 to 94) of the first processed air supplied from the outdoors into the room and the second processed air exhausted from the room to the outside. The adsorption heat exchanger (51 ,52), and reduce the heat of adsorption so that the relative humidity of the second treated air reaching the desorption section (81,82) has a value close to the first relative humidity value (RH1) at the desorption line. The temperature of the exchanger (51, 52) may be increased. This improves energy efficiency while supplying (SA) the first treated air (OA) into the room as dehumidified air and exhausting (EA) the second treated air (RA) to the outside as high humidity air. be able to.

[Humidification operation]
In the humidity control device (10) during humidification operation, outdoor air is sucked into the casing (11) from the outside air suction port (24) as second treated air, and indoor air is sucked into the casing (11) from the inside air suction port (23). The air is drawn into the air as primary treated air. In the refrigerant circuit (50), the compressor (53) is operated and the opening degree of the electric expansion valve (55) is adjusted. During humidification operation, the humidity control device (10) alternately repeats a first operation and a second operation, which will be described later, for example, every 3 minutes and 30 seconds. In other words, in the humidifying operation, the first predetermined time, which is the duration of the first operation and the second operation, is set to 3 minutes and 30 seconds.

In the first operation of the humidification operation shown in FIG. is desorbed and humidified air is supplied (SA) into the room. In addition, the second adsorption heat exchanger (52) operates as an evaporator, and the adsorption/desorption unit (adsorption unit) (82) adsorbs moisture in the first treated air (RA) and exhausts the dehumidified air to the outside. (EA) Do it.

In the second operation of the humidification operation shown in FIG. 10, the air flow path is switched by the four-way switching valve (54) and each damper (41 to 48), and the second adsorption heat exchanger (52) operates as a condenser. , an adsorption/desorption unit (desorption unit) (82) desorbs moisture into the second treated air (OA) and supplies humidified air (SA) into the room. In addition, the first adsorption heat exchanger (51) operates as an evaporator, and the adsorption/desorption unit (adsorption unit) (81) adsorbs moisture in the first treated air (RA) and exhausts the dehumidified air to the outside. (EA) Do it.

Specifically, as shown in FIG. 9, in the first operation of the humidifying operation, the switching mechanism (40) sets the air circulation path to the first path. Specifically, the second inside air side damper (42), the first outside air side damper (43), the first air supply side damper (45), and the second exhaust side damper (48) are in the open state, and the first inside air side damper (43) is opened. The side damper (41), the second outside air side damper (44), the second air supply side damper (46), and the first exhaust side damper (47) are in the closed state. In this first operation, the four-way switching valve (54) is set to the first state (the state shown in FIG. 5A). A refrigeration cycle is performed in the refrigerant circuit (50), the first adsorption heat exchanger (51) functions as a condenser (radiator), and the second adsorption heat exchanger (52) functions as an evaporator.

The first treated air (RA) that has flowed into the inside air side passageway (32) flows into the second heat exchanger chamber (38) through the second inside air side damper (42), and then flows into the second heat exchanger chamber (38). Pass through (52). In the second adsorption heat exchanger (52) (first heat source), that is, the adsorption/desorption section (adsorption section) (82), the moisture in the first treated air is adsorbed by the adsorbent, and the adsorption heat generated at that time is Heat is absorbed by the refrigerant. The first air, which has been dehydrated in the adsorption part (82), passes through the second exhaust side damper (48), flows into the exhaust side passage (33), passes through the exhaust fan chamber (35), and then enters the exhaust port (21). ) and is discharged (EA) to the outdoor space (201).

On the other hand, the second treated air (OA) that has flowed into the outside air side passageway (34) flows into the first heat exchanger chamber (37) through the first outside air side damper (43), and then undergoes the first adsorption heat. Pass through the exchanger (51). In the first adsorption heat exchanger (second heat source) (51), that is, the adsorption/desorption section (desorption section) (81), moisture is desorbed from the adsorbent heated by the refrigerant, and this desorbed moisture is transferred to the second adsorption heat exchanger (second heat source) (51). Added to treated air. In the first adsorption heat exchanger (51), the temperature of the second treated air increases somewhat. The second processed air humidified in the desorption section (81) flows into the air supply passageway (31) through the first air supply side damper (45), and after passing through the air supply fan chamber (36), the air is supplied to the air supply side. It is supplied (SA) to the indoor space (200) through the air port (22).

Further, as shown in FIG. 10, in the second operation of the humidifying operation, the switching mechanism (40) sets the air circulation path to the second path. Specifically, the first inside air side damper (41), the second outside air side damper (44), the second air supply side damper (46), and the first exhaust side damper (47) are in the open state, and the second inside air side damper (47) is opened. The side damper (42), the first outside air damper (43), the first air supply damper (45), and the second exhaust damper (48) are in the closed state. In this second operation, the four-way switching valve (54) is set to the second state (the state shown in FIG. 5B). A refrigeration cycle is performed in the refrigerant circuit (50), the second adsorption heat exchanger (52) functions as a condenser (radiator), and the first adsorption heat exchanger (51) functions as an evaporator.

The first treated air (RA) that has flowed into the inside air side passageway (32) flows into the first heat exchanger chamber (37) through the first inside air side damper (41), and then flows into the first adsorption heat exchanger chamber (37). Pass through (51). In the first adsorption heat exchanger (first heat source) (51), that is, the adsorption/desorption section (adsorption section) (81), the moisture in the first treated air is adsorbed by the adsorbent, and the adsorption heat generated at that time is Heat is absorbed by the refrigerant. The first treated air, which has been dehydrated in the adsorption part (81), flows into the exhaust side passageway (33) through the first exhaust side damper (47), passes through the exhaust fan chamber (35), and then passes through the exhaust port ( 21) and is discharged (EA) to the outdoor space (201).

On the other hand, the second treated air (OA) that has flowed into the outside air side passageway (34) flows into the second heat exchanger chamber (38) through the second outside air side damper (44), and then receives the second adsorption heat. Pass through the exchanger (52). In the second adsorption heat exchanger (second heat source) (52), that is, the adsorption/desorption section (desorption section) (82), moisture is desorbed from the adsorbent heated by the refrigerant, and this desorbed moisture is transferred to the second adsorption heat exchanger (second heat source) (52). Added to treated air. In the second adsorption heat exchanger (52), the temperature of the second treated air increases somewhat. The second processed air humidified in the desorption section (82) flows into the air supply side passageway (31) through the second air supply side damper (46), and after passing through the air supply fan chamber (36), the air is supplied to the air supply side. It is supplied (SA) to the indoor space (200) through the air port (22).

In the humidification operation described above, the controller (95) measures the temperature and humidity data (measured by each sensor (91 to 94) of the first processed air exhausted from the room to the outside and the second processed air that is supplied into the room from the outdoors. The adsorption heat exchanger ( 51, 52), and the heat of adsorption is increased so that the relative humidity of the first treated air that reaches the adsorption section (81, 82) has a value close to the second relative humidity value (RH2) at the adsorption line. The temperature of the exchanger (51, 52) may be lowered. This improves energy efficiency while supplying (SA) the second treated air (OA) into the room as humidified air and exhausting (EA) the first treated air (RA) to the outside as low-humidity air. be able to.

[Ventilation operation]
In the humidity control device (10) during ventilation operation, outdoor air is sucked into the casing (11) from the outside air suction port (24) as the first treated air, and indoor air is sucked into the casing (11) from the inside air suction port (23). The air is drawn into the air as secondary treated air. In the refrigerant circuit (50), the operation of the compressor (53), that is, the refrigeration cycle is stopped. During ventilation operation, the humidity control device (10) alternately repeats a first operation and a second operation, which will be described later, for example, for 3 minutes each. In other words, in the ventilation operation, the first predetermined time, which is the duration of the first operation and the second operation, is set to 3 minutes.

In the first operation of the ventilation operation shown in FIG. The air flows into the room (36), passes through the air supply fan room (36), and is then supplied (SA) to the indoor space (200) through the air supply port (22). On the other hand, the second treated air (RA) sucked into the inside air side passage (32) from the inside air suction port (23) flows into the first heat exchanger room (37) through the first inside air side damper (41). After that, it flows into the exhaust side passageway (33) through the first exhaust side damper (47), passes through the exhaust fan chamber (35), passes through the exhaust port (21), and is discharged (EA) into the outdoor space (201). ) to be done. That is, in the first operation of the ventilation operation, the first inside air side damper (41), the first exhaust side damper (47), the first ventilation damper (86), and the second ventilation damper (87) are in the open state. , the second inside air side damper (42), the first outside air side damper (43), the second outside air side damper (44), the first air supply side damper (45), the second air supply side damper (46), and the second outside air side damper (46). The second exhaust side damper (48) is in the closed state.

In the second operation of the ventilation operation shown in FIG. The air flows into the room (36), passes through the air supply fan room (36), and is then supplied (SA) to the indoor space (200) through the air supply port (22). On the other hand, the second treated air (RA) sucked into the inside air side passage (32) from the inside air suction port (23) flows into the second heat exchanger room (38) through the second inside air side damper (42). After that, it flows into the exhaust side passageway (33) through the second exhaust side damper (48), passes through the exhaust fan chamber (35), passes through the exhaust port (21), and is discharged (EA) into the outdoor space (201). ) to be done. That is, in the second operation of the ventilation operation, the second inside air side damper (42), the second exhaust side damper (48), the first ventilation damper (86), and the second ventilation damper (87) are in the open state. , a first inside air side damper (41), a first outside air side damper (43), a second outside air side damper (44), a first air supply side damper (45), a second air supply side damper (46), and a first outside air side damper (43). The first exhaust side damper (47) is in the closed state.

<Humidity control>
Hereinafter, with reference to FIG. 13, a processing flow of humidity control by the controller (95) of the humidity control device (10) of this embodiment will be described.

First, in step S101, when the humidity control device (10) is started, the controller (95) controls each fan (25), (26) and each damper (41) to (48), (86), ( 87).

Next, in step S102, the controller (95) controls the temperature and temperature of the air (OA, RA: hereinafter also referred to as inlet air) taken in from the outside air suction port (24) and the inside air suction port (23). Obtain relative humidity (temperature and humidity data measured by sensors (91 to 94)).

Next, in step S103, the controller (95) determines the selected operation mode, and depending on the operation mode, controls the dampers (41) to (48), (86), (87), and four-way switching. Controls the valve (54).

Specifically, when the "dehumidification operation" is selected, in step S104, the controller (95) controls the air (OA) sucked in from the outside air suction port (24) to an adsorption heat exchanger (which serves as an evaporator). 51, 52) and sucked in from the inside air suction port (23), each damper (41) to (48) , and the four-way switching valve (54) to perform batch switching control between the first operation and the second operation.

Further, when the "humidification operation" is selected, in step S105, the controller (95) controls the adsorption heat exchanger (51, 52) in which the air (OA) sucked from the outside air suction port (24) is ) and the air (RA) sucked in from the inside air suction port (23) passes through the adsorption heat exchanger (51, 52) that serves as the evaporator, and each damper (41) to (48) and the four sides. The switching valve (54) is operated to perform batch switching control between the first operation and the second operation.

Next, when the operation mode is "dehumidification operation" or "humidification operation", in step S106 following step S104 or S105, the controller (95) uses the temperature and humidity data of the inlet air acquired in step S102. , based on the pre-stored adsorption characteristics of the adsorbent (adsorption isotherm (adsorption line and desorption line), first relative humidity value (RH1), second relative humidity value (RH2)) A target temperature Tc of the heat exchanger (51, 52) and a target temperature Te of the adsorption heat exchanger (51, 52) serving as an evaporator are calculated. The target temperature Tc is set so that moisture is desorbed from the desorption portions (81, 82) in the vicinity of the first relative humidity value (RH1) at the desorption line. The target temperature Te is set so that the adsorption portions (81, 82) adsorb moisture near the second relative humidity value (RH2) on the adsorption line.

In addition, if the adsorption characteristics of the adsorbent have temperature dependence, if the temperature of the adsorbent changes by controlling the adsorption heat exchanger (heat source) (51, 52), the adsorption isotherm used to calculate the target temperatures Tc and Te will change. The controller (95) may be configured so that the lines (attraction lines, detachment lines) are updated using calculation formulas, tables, etc.

Next, when the operation mode is "dehumidification operation" or "humidification operation", in step S107 following step S106, the controller (95) performs a , heat pump (HP) operation control is started for the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52).

On the other hand, if it is determined in step S103 that the "ventilation operation" is selected, in step S108 the controller (95) controls the air (OA) sucked from the outside air suction port (24) into the ventilation passageway (85). The dampers (86) and (87) are controlled so that the dampers (86) and (87) pass through.

Note that when the operation mode is "ventilation operation", the calculation of the target temperatures Tc and Te in step S106 and the heat pump operation control in step S107 are not performed.

Next, in step S109 following step 107 or S108, the controller (95) determines whether there is a change in the temperature and humidity of the inlet air, or whether there is an instruction to change the operation mode or stop the operation of the device. Determine.

If it is determined in step S109 that the temperature and humidity of the inlet air has changed, and the operation mode is "dehumidifying operation" or "humidifying operation", the process returns to step S106, and the controller (95) sets the target temperatures Tc and Te. Recalculate.

When it is determined in step S109 that there is no change in the temperature and humidity of the inlet air, if the operation mode is "dehumidification operation" or "humidification operation", the controller (95) adjusts the target temperatures Tc and Te in step S107. Maintain heat pump operation based on

Note that in step S107, it is desirable that the target temperatures Tc and Te of the condenser and evaporator are achieved in a balanced manner; There is a possibility that the temperature at (51, 52) deviates from the target temperatures Tc and Te and becomes the normal temperature. In this case, the controller (95) may perform temperature control of the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52) so as to reduce wasted power consumption.

If it is determined in step S109 that there is an instruction to change the driving mode, the process returns to step S103, and the controller (95) performs control according to the changed driving mode.

If it is determined in step S109 that there is an instruction to stop the operation of the device, in step S110, the controller (95) controls each fan (25), (26), each damper (41) to (48), (86) and (87), the heat pump (HP) operation is stopped, and the humidity control device (10) is stopped.

<Features of Embodiment 1>
The humidity control device (10) of this embodiment dehumidifies or humidifies a target space using an adsorbent that adsorbs moisture in the air. The humidity control device (10) includes a controller (95) that controls the temperature of the adsorbent or the relative humidity of the air supplied to the adsorbent. In the adsorption isotherm of the adsorbent used in the humidity control device (10), the first range (I) is less than the first relative humidity value (RH1), and the second relative humidity value (RH2) is greater than or equal to the first relative humidity value (RH1). ) (RH2>RH1) or less is defined as the second range (II), and above the second relative humidity value (RH2) is defined as the third range (III), then the adsorbent's change in relative humidity in the second range (II) is The change in water content is greater than the change in water content of the adsorbent with respect to a change in relative humidity in the first range (I) and the third range (III). The controller (95) is configured to adjust the relative humidity in the vicinity of the first relative humidity value (RH1), for example in the range of (RH1-10%) to (RH1), preferably in the range of (RH1-5%) to (RH1), more preferably in the range of (RH1-5%) to (RH1), and more preferably in the range of (RH1-5%) to (RH1). Water is desorbed from the adsorbent in the range of RH1-3%) to (RH1). The controller (95) is configured to adjust the relative humidity in the vicinity of the second relative humidity value (RH2), for example in the range of (RH2) to (RH2+10%), preferably in the range of (RH2) to (RH2+5%), more preferably in the range of (RH2) to (RH2+5%), and more preferably in the range of (RH2) to (RH2+5%). The adsorbent absorbs moisture within the range of RH2) to (RH2+3%).

According to the humidity control device (10) of this embodiment, the controller (95) controls the temperature of the adsorbent or the relative humidity of the air supplied to the adsorbent, taking into account the adsorption characteristics of the adsorbent. Therefore, it is possible to suppress the temperature change range of the heat source (adsorption heat exchanger (51, 52)) for realizing a relative humidity range in which the required amount of adsorption can be obtained in the adsorbent, thereby improving energy efficiency.

Further, according to the humidity control device (10) of the present embodiment, since an adsorbent having so-called S-shaped adsorption characteristics is used, a heat source ( Since the temperature change width of the adsorption heat exchanger (51, 52) can be further suppressed, energy efficiency can be further improved.

Further, according to the humidity control device (10) of the present embodiment, the temperature change width when heating or cooling the adsorption heat exchanger (51, 52) that supports the adsorbent, that is, the adsorption/desorption unit (81, 82). becomes smaller. Therefore, it is possible to reduce stress fluctuations in the adsorption/desorption section (81, 82) caused by temperature changes or swelling/contraction of the adsorbent, so deterioration of the adsorption/desorption section (81, 82) can be suppressed and the adsorption/desorption The life of parts (81, 82) can be extended.

Further, according to the humidity control device (10) of the present embodiment, the temperature between the condenser temperature (target Tc) and the evaporator temperature (target Te) required for dehumidification operation and humidification operation is determined according to the adsorption characteristics of the adsorbent. The difference can be reduced. Therefore, compared to the prior art, the rotation speed of the compressor (53) can be lowered, and the energy saving performance of the humidity control device (10) is improved.

In the adsorbent used in the humidity control device (10) of this embodiment, the slope of the adsorption isotherm in the second range (II) is the slope of the adsorption isotherm in the first range (I) and the third range (III). It may be 5 times or more. In this way, energy efficiency can be further improved.

In the adsorbent used in the humidity control device (10) of this embodiment, the amount of change in water content ΔW in the second range (II) may be 50% or more of the maximum water content of the adsorbent. In this way, energy efficiency can be further improved.

In the adsorbent used in the humidity control device (10) of this embodiment, the difference between the second relative humidity value (RH2) and the first relative humidity value (RH1) may be 40% or less. In this way, energy efficiency can be further improved.

The adsorbent used in the humidity control device (10) of this embodiment may be a metal organic framework (MOF). In this way, an adsorbent having desired adsorption properties can be obtained.

The humidity control device (10) of the present embodiment includes an adsorption/desorption unit (81, 82) on which an adsorbent is supported and which adsorbs moisture in the treated air and desorbs the adsorbed moisture; 81, 82) adsorbs and desorbs moisture, a heat source (adsorption heat exchanger (51, 52)) that adjusts the relative humidity, a fan (25, 26) that controls the air flow of the treated air, and a The controller (95) includes an acquisition unit (sensors (91 to 94)) that acquires temperature and humidity data, and the controller (95) controls the adsorption heat exchanger (51, 52) based on the temperature and humidity data acquired by the sensors (91 to 94). The temperature may be controlled. In this way, it becomes possible to control the temperature of the adsorption heat exchanger (51, 52) to achieve a relative humidity range in which the required amount of adsorption can be obtained in the adsorbent.

In the adsorbent used in the humidity control device (10) of this embodiment, the adsorption isotherm may include an adsorption line when adsorbing moisture and a desorption line when desorbing the adsorbed moisture. In this case, one of the adsorption/desorption parts (81, 82) is an adsorption part (81, 82) that adsorbs moisture in the treated air, and the other part of the adsorption/desorption part (81, 82) is an adsorption part (81, 82) that adsorbs moisture in the treated air. One side of the adsorption heat exchanger (51, 52) is a first heat source that adjusts the relative humidity at which the adsorption part (81, 82) adsorbs moisture. Alternatively, the other of the adsorption heat exchangers (51, 52) may be a second heat source that adjusts the relative humidity at which the desorption section (81, 82) desorbs water. The controller (95) also controls one side of the adsorption heat exchanger (51, 52) so that moisture is desorbed from the desorption section (81, 82) near the first relative humidity value (RH1) at the desorption line. In addition to controlling the temperature, the temperature of the other side of the adsorption heat exchanger (51, 52) is controlled so that the adsorption part (81, 82) adsorbs moisture near the second relative humidity value (RH2) at the adsorption line. It's okay. In this way, water can be desorbed from the adsorbent in the desorption section (81, 82) near the first relative humidity value (RH1), and it can be adsorbed near the second relative humidity value (RH2). Moisture can be adsorbed by the adsorbent in parts (81, 82).

When the humidity control device (10) of this embodiment performs a dehumidifying operation, the controller (95) provides temperature and humidity data ( Based on the measured values of each sensor (91 to 94), the relative humidity of the first treated air reaching the adsorption part (81, 82) is determined to be a value near the second relative humidity value (RH2) at the adsorption line. At the same time, the temperature of the adsorption heat exchanger (51, 52) serving as the first heat source is lowered so that the relative humidity of the second treated air reaching the desorption section (81, 82) becomes the first relative humidity at the desorption line. The temperature of the adsorption heat exchanger (51, 52) serving as the second heat source may be increased so as to have a value close to the value (RH1). In this way, the first treated air can be supplied into the room as dehumidified air, and the second treated air can be made into high humidity air and exhausted to the outside, while improving energy efficiency.

When the humidity control device (10) of this embodiment performs humidification operation, the controller (95) provides temperature and humidity data ( Based on the measured values of each sensor (91 to 94), the relative humidity of the second treated air that reaches the desorption section (81, 82) is a value near the first relative humidity value (RH1) at the desorption line. At the same time, the temperature of the adsorption heat exchanger (51, 52) serving as the second heat source is increased so that the relative humidity of the first treated air reaching the adsorption section (81, 82) becomes the second relative humidity at the adsorption line. The temperature of the adsorption heat exchanger (51, 52) serving as the first heat source may be lowered so as to have a value close to the value (RH2). In this way, while improving energy efficiency, the second treated air can be supplied into the room as humidified air, and the first treated air can be made into low humidity air and exhausted outside.

In the humidity control device (10) of the present embodiment, the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52) constitute a heat pump, and the controller (95) (51) and the temperature of the second adsorption heat exchanger (52) may be controlled in conjunction with each other. In this way, the energy efficiency of the humidity control device (10) can be further improved.

(Embodiment 2)
The humidity control device (110) according to the second embodiment dehumidifies or humidifies a target space using an adsorbent that adsorbs moisture in the air. The humidity control device (110) controls the temperature of the adsorbent or the relative humidity of the air supplied to the adsorbent, taking into account the adsorption properties of the adsorbent.

The adsorbent used in the humidity control device (110) of this embodiment is the same as that of Embodiment 1, and has, for example, an S-shaped adsorption characteristic (adsorption isotherm) as shown in FIG.

The humidity control device (110) of the present embodiment is arranged in the vicinity of the first relative humidity value (RH1), for example in the range of (RH1-10%) to (RH1), preferably in the range of (RH1-5%) to (RH1). Moisture is desorbed from the adsorbent within a range, more preferably within a range of (RH1-3%) to (RH1).

The humidity control device (110) of the present embodiment is configured to operate near the second relative humidity value (RH2), for example in the range of (RH2) to (RH2+10%), preferably in the range of (RH2) to (RH2+5%). Allow the adsorbent to adsorb moisture within a range, preferably within a range of (RH2) to (RH2+3%).

<Configuration of humidity control device>
The humidity control device (110) of this embodiment not only controls the humidity of the indoor space but also ventilates the indoor space. The humidity control device (110) adjusts the humidity of the outdoor air (OA) that it draws in and supplies it to the indoor space (SA), and at the same time discharges (EA) the indoor air that it draws in to the outdoor space. The humidity control device (110) may be installed together with an air conditioner. The humidity control device (110) may be configured integrally with an air conditioner, specifically, an outdoor unit.

The humidity control device (110) will be described in detail with reference to FIG. 14.

The humidity control device (110) includes a casing (111). The casing (111) is formed into a rectangular parallelepiped shape that is somewhat flat and relatively low in height. The internal space of the casing (111) is divided into a first air passage (113) and a second air passage (114) by a partition plate (112). The first air passage (113) and the second air passage (114) face each other with the partition plate (112) in between. An outside air suction port (111a) is formed at the outdoor end of the first air passage (113), and an air supply port (111b) is formed at the indoor end. An indoor air suction port (111c) is formed at the indoor end of the second air passageway (114), and an exhaust port (111d) is formed at the outdoor end. Although not shown in the figure, the outside air suction duct (111a) has an outside air suction duct, the air supply port (111b) has an air supply duct, the inside air suction port (111c) has an inside air suction duct, and the exhaust port (111c) has an outside air suction duct. 111d) may each be connected to an exhaust duct.

A humidity control rotor (115) is installed in the humidity control device (110) so as to cross both the first air passage (113) and the second air passage (114). The humidity control rotor (115) is formed, for example, in a disc shape. The humidity control rotor (115) is configured by supporting an adsorbent on the surface of a base material formed in, for example, a honeycomb shape. The humidity control rotor (115) is configured to allow air to pass through it in its thickness direction and to bring the passing air into contact with the adsorbent. As the base material of the humidity control rotor (115), materials such as ceramic paper, glass fiber, an organic compound mainly composed of cellulose (for example, paper), metal, and resin can be used. Instead of forming the humidity control rotor (115) in a disk shape, it may be formed in a polygonal plate shape. Instead of forming the base material of the humidity control rotor (115) into a honeycomb shape, it may be formed into a mesh shape or a filter shape.

The humidity control rotor (115) is driven by a motor (not shown), rotates around the central axis at a predetermined speed, and moves between the first air passage (113) and the second air passage (114). That is, the portion of the humidity control rotor (115) that comes into contact with the air flowing through the first air passage (113) moves to the second air passage (114) as it rotates, and the air flowing through the second air passage (114) moves to the second air passage (114) as it rotates. The portion that came into contact with the air moves back to the first air passage (113) as it rotates. The parts of the humidity control rotor (115) located in the first air passage (113) and the second air passage (114) each function as an adsorption/desorption part (adsorption part or desorption part) (115A, 115B). .

An outside temperature/humidity sensor (121) and an outside air filter (122) are installed near the outside air suction port (111a) in the first air passageway (113). The outside temperature and humidity sensor (121) measures the temperature and relative humidity of the outside air (OA) flowing through the first air passageway (113). The outside air filter (122) removes dust and the like from the air passing through it. Upstream of the humidity control rotor (115) in the first air passage (113), an outside air side heat source (first heat source or second heat source) (123) is installed. The outside air side heat source (123) may be a heater and/or a cooler. An air supply fan (124) is installed downstream of the humidity control rotor (115) in the first air passageway (113). When the air supply fan (124) is operated, outdoor air is taken into the first air passage (113), and the taken outdoor air is supplied (SA) into the room after passing through the humidity control rotor (115). .

An inside temperature/humidity sensor (131) and an inside air filter (132) are installed near the inside air suction port (111c) in the second air passageway (114). The indoor temperature and humidity sensor (131) measures the temperature and relative humidity of the indoor air (RA) flowing through the second air passageway (114). The inside air filter (132) removes dust and the like from the air passing through it. Upstream of the humidity control rotor (115) in the second air passageway (114), an inside air side heat source (first heat source or second heat source) (133) is installed. The inside air side heat source (133) may be a heater and/or a cooler. An exhaust fan (134) is installed downstream of the humidity control rotor (115) in the second air passage (114). When the exhaust fan (134) is operated, indoor air is drawn into the second air passageway (114), and the drawn indoor air is exhausted (EA) to the outside after passing through the humidity control rotor (115).

Although not shown, the humidity control device (110) is provided with an electrical component box that includes a control board, a power supply board, etc. on which a control unit (140) described later is mounted.

<Control unit>
The control unit (140) may be configured using, for example, a microcomputer and a memory device that stores software for operating the microcomputer. Measured values of the outside temperature/humidity sensor (121) and the inside temperature/humidity sensor (131) are input to the control unit (140). The control unit (140) controls the operation of the humidity control device (110) based on these input measurement values. That is, the control unit (140) controls the operation of the humidity control rotor (115), each heat source (123), (133), and each fan (124), (134).

The control unit (140) controls the temperature of the adsorbent supported by each adsorption/desorption unit (115A, 115B) or the relative humidity of the air supplied to the adsorbent. Specifically, the control unit (140) controls the temperature of each heat source (123) and (133) based on the temperature and humidity data acquired by the outside temperature and humidity sensor (121) and the inside temperature and humidity sensor (131). Then, moisture is desorbed from the adsorbent (desorption part (115A, 115B)) near the first relative humidity value (RH1), and moisture is desorbed from the adsorbent (adsorption part (115A, 115B) near the second relative humidity value (RH2)). 115A, 115B)) to absorb moisture.

Note that the control unit (140) may independently control the temperature of the outside air side heat source (123) and the temperature of the inside air side heat source (133).

<Driving operation>
The humidity control device (110) of this embodiment selectively performs dehumidification operation, humidification operation, and ventilation operation. The dehumidification operation and humidification operation are humidity control operations aimed at adjusting the absolute humidity of outdoor air supplied indoors. The ventilation operation is an operation for only ventilating the room.

In the dehumidification operation and humidification operation, the humidity control rotor (115), each heat source (123), (133), and each fan (124), (134) operate. During ventilation operation, only the humidity control rotor (115) and each fan (124) and (134) operate. The humidity control device (110) supplies inhaled outdoor air (OA) indoors as supply air (SA), and discharges inhaled indoor air (RA) outdoors as exhaust air (EA).

If the adsorption isotherm of the adsorbent used in the humidity control device (110) includes an adsorption line for adsorbing moisture and a desorption line for desorbing the adsorbed moisture, as shown in FIG. The section (140) controls the temperature of the heat source (123, 124) so that moisture is desorbed from the desorption section (115A, 115B) near the first relative humidity value (RH1) at the desorption line, and also controls the temperature at the adsorption line. The temperature of the heat source (123, 124) may be controlled so that the adsorption unit (115A, 115B) adsorbs moisture near the second relative humidity value (RH2).

Hereinafter, the dehumidification operation, humidification operation, and ventilation operation performed by the humidity control device (110) will be described in detail.

[Dehumidification operation]
In the humidity control device (110), the air supply fan (124) and the exhaust fan (134) are operated, and the outside air side heat source (123) and the inside air side heat source (133) are energized. Further, the humidity control rotor (115) is rotated at a predetermined rotational speed by a motor (not shown).

Outdoor air (OA) is taken into the first air passage (113). The outdoor air taken into the first air passage (113) is cooled by the outdoor air side heat source (first heat source) (123), and then transferred to the adsorption/desorption section (adsorption section) (115A) of the humidity control rotor (115). and comes into contact with the adsorbent. By contact with this cooled outdoor air, the adsorbent of the adsorption section (115A) is cooled, and the moisture contained in the outdoor air is adsorbed by the adsorbent. The low-humidity air that has passed through the adsorption section (115A) and has been dehydrated is supplied (SA) into the room.

The humidity control rotor (115) rotates at a predetermined number of rotations. Therefore, the adsorbent that has adsorbed moisture from the outdoor air in the adsorption section (115A), that is, the first air passage (113), moves to the second air passage (114) as the humidity control rotor (115) rotates.

Room air (RA) is taken into the second air passage (114). The indoor air taken into the second air passage (114) is heated by the inside air side heat source (second heat source) (133). The heated indoor air is sent to the adsorption/desorption section (115B) of the humidity control rotor (115) and comes into contact with the adsorbent. By contact with this heated indoor air, the adsorbent in the desorption section (115B) is heated, and water is desorbed from the adsorbent. The moisture desorbed from the adsorbent is exhausted (EA) to the outside together with the indoor air that has passed through the humidity control rotor (115).

The adsorbent, which has been regenerated by desorption of water in the desorption part (115B), moves to the first air passage (113) again as the humidity control rotor (115) rotates. As described above, the adsorbent moves with the rotation of the humidity control rotor (115), and alternately repeats adsorption of moisture in the adsorption section (115A) and desorption of moisture in the desorption section (115B). .

In the dehumidification operation described above, the control unit (140) controls the temperature and humidity data (measured values of each sensor (121, 131) ), the outside air side heat source (first heat source) ( 123), and the inside air side heat source (the second 2 heat source) (133) may be raised. This improves energy efficiency while supplying (SA) the first treated air (OA) into the room as dehumidified air and exhausting (EA) the second treated air (RA) to the outside as high humidity air. be able to.

[Humidification operation]
In the humidity control device (110), the air supply fan (124) and the exhaust fan (134) are operated, and the outside air side heat source (123) and the inside air side heat source (133) are energized. Further, the humidity control rotor (115) is rotated at a predetermined rotational speed by a motor (not shown).

Outdoor air (OA) is taken into the first air passage (113). The outdoor air taken into the first air passage (113) is heated by an outside air side heat source (second heat source) (123). The heated outdoor air is sent to the adsorption/desorption section (desorption section) (115A) of the humidity control rotor (115) and comes into contact with the adsorbent. By contact with this heated indoor air, the adsorbent in the desorption section (115A) is heated, and water is desorbed from the adsorbent. The moisture desorbed from the adsorbent is added to the outdoor air that has passed through the humidity control rotor (115) to generate humidified air, and the humidified air is supplied (SA) indoors.

The humidity control rotor (115) rotates at a predetermined number of rotations. Therefore, the adsorbent that has desorbed moisture from the outdoor air in the desorption part (115A), that is, the first air passage (113), is transferred to the second air passage (114) as the humidity control rotor (115) rotates. Moving.

Room air (RA) is taken into the second air passage (114). The indoor air taken into the second air passage (114) is cooled by the inside air side heat source (first heat source) (133), and then transferred to the adsorption/desorption section (adsorption section) (115B) of the humidity control rotor (115). and comes into contact with the adsorbent. The adsorbent of the adsorption unit (115B) is cooled by contact with the cooled indoor air, and the moisture contained in the indoor air is adsorbed by the adsorbent. Indoor air that has passed through the adsorption section (115B) and has been deprived of moisture is exhausted (EA) to the outside.

The adsorbent that has adsorbed moisture in the adsorption part (115B) moves to the first air passage (113) again as the humidity control rotor (115) rotates. As described above, the adsorbent moves with the rotation of the humidity control rotor (115), and alternately repeats adsorption of moisture in the adsorption section (115B) and desorption of moisture in the desorption section (115A). .

In the humidification operation described above, the control unit (140) controls the temperature and humidity data (measured values of each sensor (121, 131) ), the outside air side heat source (second heat source) is set so that the relative humidity of the second treated air reaching the desorption section (115A) has a value close to the first relative humidity value (RH1) at the desorption line. (123), the inside air side heat source (the second 1 heat source) (133) may be lowered. This improves energy efficiency while supplying (SA) the second treated air (OA) into the room as humidified air and exhausting (EA) the first treated air (RA) to the outside as low-humidity air. be able to.

[Ventilation operation]
In the humidity control device (110) during ventilation operation, the air supply fan (124), exhaust fan (134), and humidity control rotor (115) are operated, and outdoor air (OA) is The indoor air (RA) is sucked into the second air passage (114) from the inside air suction port (111c). The operation of the outside air side heat source (123) and the inside air side heat source (133) is stopped.

The outdoor air sucked into the first air passage (113) from the outside air suction port (111a) passes through the humidity control rotor (115) and is supplied (SA) indoors from the air supply port (111b). On the other hand, the indoor air (RA) sucked into the second air passage (114) from the inside air suction port (111c) passes through the humidity control rotor (115) and is exhausted (EA) to the outside from the exhaust port (111d). Ru.

<Humidity control>
Hereinafter, with reference to FIG. 15, a processing flow of humidity control by the control unit (140) of the humidity control device (110) of this embodiment will be described.

First, in step S201, when the humidity control device (110) is started, the control unit (140) operates the air supply fan (124), the exhaust fan (134), and the humidity control rotor (115).

Next, in step S202, the control unit (140) controls the outside air suction port (111a), the inside air suction port (111c), and the air sucked in from the outside air suction port (111a) and the inside air suction port (111c) (OA, RA: hereinafter also referred to as inlet air). Obtain temperature and relative humidity (temperature and humidity data measured by sensor (121, 131)).

Next, in step S203, the control unit (140) determines the selected operation mode and controls each heat source (123) and (133) according to the operation mode.

Specifically, when "dehumidification operation" or "humidification operation" is selected, in step 204, the control unit (140) uses the temperature and humidity data of the inlet air acquired in step S202 and the adsorption data stored in advance. Based on the adsorption properties of the material (adsorption isotherm (adsorption line and desorption line), first relative humidity value (RH1), second relative humidity value (RH2)), the target temperature of each heat source (123) and (133) is determined. Calculate. The target temperature of each heat source (123), (133) is that water is desorbed from the desorption part (115A, 115B) near the first relative humidity value (RH1) at the desorption line, and the second relative humidity value at the adsorption line is The adsorption parts (115A, 115B) are set to adsorb moisture near the humidity value (RH2).

In addition, if the adsorption properties of the adsorbent are temperature dependent, if the temperature of the adsorbent changes by controlling each heat source (123) and (133), the adsorption isotherm (adsorption line, desorption line, The control unit (140) may be configured so that the distance (track loss) is updated using a calculation formula, table, or the like.

Next, when the operation mode is "dehumidification operation" or "humidification operation", in step 205 following step S204, the control unit (140) controls each temperature based on the target temperature calculated in step S204. Start temperature control of heat sources (123) and (133).

In step 205, consideration is given to the case where the relative humidity of the adsorption/desorption section (115A, 115B) deviates from the target value due to a temperature drop caused by the distance from each heat source (123), (133) to the humidity control rotor (115). Then, the temperature of each heat source (123) and (133) may be controlled by correcting this temperature drop.

In addition, when the operation mode is "ventilation operation", the target temperature calculation in step S204 and the heat source control in step S205 are not performed, and the process proceeds to the next step S206.

Next, in step S206, the control unit (140) determines whether there is a change in the temperature and humidity of the inlet air, and whether there is an instruction to change the operation mode or stop the operation of the device.

When it is determined in step S206 that the temperature and humidity of the inlet air has changed, if the operation mode is "dehumidifying operation" or "humidifying operation", the control unit (140) returns to step S204 and controls each heat source (123). , recalculate the target temperature of (133).

If it is determined in step S206 that there is no change in the temperature and humidity of the inlet air, and if the operation mode is "dehumidification operation" or "humidification operation", the control unit (140) controls each heat source (123) in step S205. , (133) to maintain temperature control.

If it is determined in step S206 that there is an instruction to change the driving mode, the process returns to step S203, and the control unit (140) performs control according to the changed driving mode.

If it is determined in step S206 that there is an instruction to stop the operation of the device, in step S207 the control unit (140) stops the operation of each fan (124), (134) and humidity control rotor (115). At the same time, the operation of each heat source (123) and (133) is stopped, and the operation of the humidity control device (110) is also stopped.

<Features of Embodiment 2>
The humidity control device (110) of this embodiment dehumidifies or humidifies a target space using an adsorbent that adsorbs moisture in the air. The humidity control device (110) includes a control unit (140) that controls the temperature of the adsorbent or the relative humidity of the air supplied to the adsorbent. In the adsorption isotherm of the adsorbent used in the humidity control device (110), the first range (I) is less than the first relative humidity value (RH1), and the second relative humidity value (RH2) is greater than or equal to the first relative humidity value (RH1). ) (RH2>RH1) or less is defined as the second range (II), and above the second relative humidity value (RH2) is defined as the third range (III), then the adsorbent's change in relative humidity in the second range (II) is The change in water content is greater than the change in water content of the adsorbent with respect to a change in relative humidity in the first range (I) and the third range (III). The control unit (140) is configured to adjust the humidity in the vicinity of the first relative humidity value (RH1), for example in the range of (RH1-10%) to (RH1), preferably in the range of (RH1-5%) to (RH1), more preferably in the range of (RH1-5%) to (RH1). Moisture is desorbed from the adsorbent within the range of (RH1-3%) to (RH1). The control unit (140) is configured to adjust the relative humidity in the vicinity of the second relative humidity value (RH2), for example in the range of (RH2) to (RH2+10%), preferably in the range of (RH2) to (RH2+5%), more preferably in the range of (RH2) to (RH2+5%). Let the adsorbent absorb moisture in the range of (RH2) to (RH2+3%).

According to the humidity control device (110) of this embodiment, the control unit (140) controls the temperature of the adsorbent or the relative humidity of the air supplied to the adsorbent, taking into account the adsorption characteristics of the adsorbent. Therefore, it is possible to suppress the temperature change range of the heat source (123, 133) to achieve a relative humidity range in which the required amount of adsorption can be obtained in the adsorbent, thereby improving energy efficiency.

Further, according to the humidity control device (110) of the present embodiment, since an adsorbent having so-called S-shaped adsorption characteristics is used, a heat source ( 123,133) can be further suppressed, so energy efficiency can be further improved.

Furthermore, according to the humidity control device (110) of the present embodiment, the width of temperature change when heating or cooling the humidity control rotor (115) that supports the adsorbent, that is, the adsorption/desorption unit (115A, 115B) is reduced. . Therefore, it is possible to reduce stress fluctuations in the adsorption/desorption parts (115A, 115B) caused by temperature changes or swelling and contraction of the adsorbent, so deterioration of the adsorption/desorption parts (115A, 115B) can be suppressed and adsorption/desorption can be performed. (115A, 115B) can be extended.

In the adsorbent used in the humidity control device (110) of this embodiment, the slope of the adsorption isotherm in the second range (II) is the slope of the adsorption isotherm in the first range (I) and the third range (III). It may be 5 times or more. Thereby, energy efficiency can be further improved.

In the adsorbent used in the humidity control device (110) of the present embodiment, the amount of change ΔW in the water content in the second range (II) may be 50% or more of the maximum water content of the adsorbent. In this way, energy efficiency can be further improved.

In the adsorbent used in the humidity control device (110) of this embodiment, the difference between the second relative humidity value (RH2) and the first relative humidity value (RH1) may be 40% or less. In this way, energy efficiency can be further improved.

The adsorbent used in the humidity control device (110) of this embodiment may be a metal organic framework (MOF). In this way, an adsorbent having desired adsorption properties can be obtained.

The humidity control device (110) of the present embodiment includes an adsorption/desorption unit (115A, 115B) on which an adsorbent is supported and which adsorbs moisture in the treated air and desorbs the adsorbed moisture; 115A, 115B), a heat source (123, 133) that adjusts the relative humidity that adsorbs and desorbs moisture, a fan (124, 134) that controls the airflow of the processing air, and an acquisition unit (sensor) that obtains the temperature and humidity data of the processing air. (121, 131)), and the control unit (140) may control the temperature of the heat source (123, 133) based on the temperature and humidity data acquired by the sensor (121, 131). In this way, it becomes possible to control the temperature of the heat source (123, 133) to achieve a relative humidity range in which the required amount of adsorption can be obtained in the adsorbent.

In the adsorbent used in the humidity control device (110) of this embodiment, the adsorption isotherm may include an adsorption line when adsorbing moisture and a desorption line when desorbing the adsorbed moisture. In this case, one of the adsorption/desorption parts (115A, 115B) is an adsorption part (115A, 115B) that adsorbs moisture in the treated air, and the other part of the adsorption/desorption part (115A, 115B) is an adsorption part (115A, 115B) that adsorbs moisture in the treated air. One of the heat sources (123,133) is a first heat source that adjusts the relative humidity at which the adsorption part (115A, 115B) adsorbs water; ) may be a second heat source that adjusts the relative humidity at which the desorption parts (115A, 115B) perform desorption of moisture. The control unit (140) also controls the temperature of one of the heat sources (123, 133) so that moisture is desorbed from the desorption parts (115A, 115B) near the first relative humidity value (RH1) at the desorption line. At the same time, the temperature of the other heat source (123, 133) may be controlled so that the adsorption section (115A, 115B) adsorbs moisture near the second relative humidity value (RH2) on the adsorption line. In this way, water can be desorbed from the adsorbent of the desorption section (115A, 115B) near the first relative humidity value (RH1), and it can be adsorbed near the second relative humidity value (RH2). Moisture can be adsorbed by the adsorbent of parts (115A, 115B).

When the humidity control device (110) of this embodiment performs a dehumidification operation, the control unit (140) provides temperature and humidity data of the first processed air supplied from the outdoors into the room and the second processed air exhausted from the room to the outside. (Based on the measured values of each sensor (121, 131), the outside air is adjusted so that the relative humidity of the first treated air that reaches the adsorption part (115A) has a value near the second relative humidity value (RH2) at the adsorption line. While lowering the temperature of the side heat source (first heat source) (123), the relative humidity of the second treated air reaching the desorption section (115B) increases to a value near the first relative humidity value (RH1) at the desorption line. You may raise the temperature of the inside air side heat source (second heat source) (133) so that The treated air can be made into high-humidity air and exhausted outside.

When the humidity control device (110) of this embodiment performs humidification operation, the control unit (140) provides temperature and humidity data of the first processed air exhausted from indoors to outdoors and the second processed air supplied from outdoors to indoors. (measured values of each sensor (121, 131)) so that the relative humidity of the second treated air that reaches the desorption section (115A) has a value near the first relative humidity value (RH1) at the desorption line. As the temperature of the outside air side heat source (second heat source) (123) increases, the relative humidity of the first treated air reaching the adsorption part (115B) increases to a value near the second relative humidity value (RH2) at the adsorption line. The temperature of the inside air side heat source (first heat source) (133) may be lowered so as to maintain the temperature. In this way, the second treated air can be supplied into the room as humidified air, and the first treated air can be made into low humidity air and exhausted outside, while improving energy efficiency.

In the humidity control device (110) of this embodiment, the outside air side heat source (123) and the inside air side heat source (133) do not need to constitute a heat pump. Further, the control unit (140) may independently control the temperature of the outside air side heat source (123) and the temperature of the inside air side heat source 133). In this way, the configuration of the humidity control device (110) can be simplified.

(Other embodiments)
In the embodiment, the humidity control device (10, 110) is configured as a humidity control ventilation unit capable of dehumidification, humidification, and ventilation. etc. are not particularly limited. For example, the humidity control device of the present disclosure does not need to have a ventilation function. Further, the humidity control device of the present disclosure may be installed indoors, integrated with or separately from an air conditioning indoor unit, or may be installed outdoors, integrated with or separately from an air conditioning outdoor unit.

Furthermore, in the above embodiment, a heat pump (heat exchanger) or a heater is used as the heat source (51, 52, 123, 133) used in the humidity control device (10, 110), but the type of heat source (51, 52, 123, 133) is not particularly limited. Instead, for example, cold/hot water or waste water may be used as the heat source.

Although the embodiments have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the claims. Moreover, the above embodiments may be combined or replaced as appropriate. Furthermore, the descriptions such as "first", "second", etc. mentioned above are used to distinguish the words to which these descriptions are given, and even the number and order of the words are limited. It's not something you do.

As explained above, the present disclosure is useful for humidity control devices.

10 Humidity control device 25 Exhaust fan (fan)
26 Air supply fan (fan)
51 First adsorption heat exchanger (heat source (first heat source or second heat source))
52 Second adsorption heat exchanger (heat source (first heat source or second heat source))
81, 82 Adsorption/desorption section (adsorption section or desorption section)
91 Inside air temperature sensor (acquisition unit)
92 Inside air humidity sensor (acquisition unit)
93 Outside air temperature sensor (acquisition unit)
94 Outside air humidity sensor (acquisition unit)
95 Controller (control unit)
110 Humidity control device 115 Humidity control rotor 115A, 115B Adsorption/desorption section (adsorption section or desorption section)
121 Outside temperature and humidity sensor (acquisition unit)
123 Outside air side heat source (first heat source or second heat source)
124 Air supply fan (fan)
131 Internal temperature and humidity sensor (acquisition unit)
133 Inside air side heat source (first heat source or second heat source)
134 Exhaust fan (fan)
140 Control section

Claims (8)

A humidity control device (10,110) using an adsorbent that adsorbs moisture in the air,
comprising a control unit (95, 140) that controls the temperature of the adsorbent or the relative humidity of the air supplied to the adsorbent;
In the adsorption isotherm of the adsorbent, a first range is less than the first relative humidity value, a second range is from the first relative humidity value to a second relative humidity value (>the first relative humidity value), and A third range is greater than the second relative humidity value, and a change in the water content of the adsorbent with respect to a change in relative humidity in the second range is a change in the moisture content of the adsorbent with respect to a change in relative humidity in the first range and the third range. greater than the change in moisture content of
The adsorbent has S-shaped adsorption characteristics, and the adsorption isotherm curves in a substantially S-shape in the second range and extends in a substantially straight line in the first range and the third range. ,
The slope of the adsorption isotherm of the adsorbent in the second range is 5 times or more the slope of the adsorption isotherm of the adsorbent in the first range and the third range,
The amount of change in the water content of the adsorbent in the second range is 50% or more of the maximum water content of the adsorbent,
The difference between the second relative humidity value and the first relative humidity value is 40% or less,
The control unit (95, 140) causes moisture to be desorbed from the adsorbent near the first relative humidity value, and causes the adsorbent to adsorb moisture near the second relative humidity value,
The vicinity of the first relative humidity value ranges from the first relative humidity value to -10%,
The vicinity of the second relative humidity value ranges from the second relative humidity value to +10%,
Humidity control device. The humidity control device according to claim 1,
The adsorbent is composed of a metal-organic framework.
Humidity control device. The humidity control device according to claim 1 or 2 ,
an adsorption/desorption unit (81, 82, 115A, 115B) that includes the adsorbent and adsorbs moisture in the treated air and desorbs the adsorbed moisture;
a heat source (51, 52, 123, 133) that adjusts the relative humidity at which the adsorption/desorption unit (81, 82, 115A, 115B) adsorbs and desorbs moisture;
a fan (25, 26, 124, 134) that controls the airflow of the processing air;
further comprising an acquisition unit (91, 92, 93, 94, 121, 131) that acquires temperature and humidity data of the treated air,
The control unit (95, 140) controls the temperature of the heat source (51, 52, 123, 133) based on the temperature and humidity data acquired by the acquisition unit (91, 92, 93, 94, 121, 131).
Humidity control device. The humidity control device according to claim 3 ,
The adsorption isotherm of the adsorbent includes an adsorption line when adsorbing moisture and a desorption line when desorbing the adsorbed moisture,
The adsorption/desorption unit (81, 82, 115A, 115B) includes an adsorption unit (81, 82, 115A, 115B) that adsorbs moisture in the treated air, and a desorption unit (81, 82, 115) that desorbs the adsorbed moisture. A,115B),
The heat source (51, 52, 123, 133) is a first heat source (51, 52, 123, 133) that adjusts the relative humidity at which the adsorption section (81, 82, 115A, 115B) adsorbs moisture, and the desorption section (81, 82, 115A). , 115B) includes a second heat source (51, 52, 123, 133) for adjusting the relative humidity in which water is desorbed;
The control section (95, 140) controls the second heat source (51, 52, 123, 133) so that moisture is desorbed from the desorption section (81, 82, 115A, 115B) near the first relative humidity value at the desorption line. ) of the first heat source (51, 52, 123, 133) so that the adsorption section (81, 82, 115A, 115B) adsorbs moisture near the second relative humidity value at the adsorption line. control the temperature,
Humidity control device. The humidity control device according to claim 4 ,
When dehumidifying the room, the control section (95, 140) controls the adsorption section ( The temperature of the first heat source (51, 52, 123, 133) is adjusted such that the relative humidity of the first treated air that reaches the air (81, 82, 115A, 115B) has a value near the second relative humidity value at the adsorption line. and the second heat source so that the relative humidity of the second treated air reaching the desorption section (81, 82, 115A, 115B) has a value near the first relative humidity value at the desorption line. (51, 52, 123, 133) to supply the first treated air indoors as dehumidified air and exhaust the second treated air outdoors as high humidity air;
Humidity control device. The humidity control device according to claim 4 ,
When humidifying the room, the control section (95, 140) controls the desorption section based on the temperature and humidity data of the first processed air exhausted from the room to the outside and the second processed air that is supplied into the room from the outside. The temperature of the second heat source (51, 52, 123, 133) is such that the relative humidity of the second treated air that reaches (81, 82, 115A, 115B) has a value near the first relative humidity value at the separation line. the first heat source so that the relative humidity of the first treated air reaching the adsorption section (81, 82, 115A, 115B) has a value close to the second relative humidity value at the adsorption line. By lowering the temperature of (51, 52, 123, 133), the second treated air is supplied into the room as humidified air, and the first treated air is made into low humidity air and exhausted outside.
Humidity control device. The humidity control device according to claim 4 ,
The first heat source (51, 52) and the second heat source (51, 52) constitute a heat pump,
The control unit (95) controls the temperature of the first heat source (51, 52) and the temperature of the second heat source (51, 52) in conjunction with each other.
Humidity control device. The humidity control device according to claim 4 ,
The first heat source (123, 133) and the second heat source (123, 133) do not constitute a heat pump,
The control unit (140) independently controls the temperature of the first heat source (123, 133) and the temperature of the second heat source (123, 133).
Humidity control device.