JP7054875B2 - Humidity control system using liquid hygroscopic material and air conditioner equipped with it - Google Patents

Description

The present invention relates to a humidity control system that dehumidifies and humidifies air using a liquid moisture absorbing material, and an air conditioner provided with this humidity control system.

Conventionally, as a material (hygroscopic agent or desiccant) that absorbs moisture in the air, not only a solid material but also a liquid material is known. As a typical liquid moisture absorbing material, an aqueous solution of a salt of Group 1 or 2 of the periodic table (for example, an aqueous solution of lithium chloride (LiCl), calcium chloride (CaCl ₂ ), lithium bromide (LiBr), etc.) can be mentioned. Be done. Further, recently, it has been proposed to use an ionic liquid as a liquid hygroscopic material.

The ionic liquid is a salt that exists as a liquid, and a salt having a melting point of 100 ° C. or lower or 300 ° C. or lower is generally referred to as an ionic liquid. Typical configurations of ionic liquids include organic cations and organic anions, or combinations of organic cations and inorganic anions.

Examples of the system for controlling the humidity of air using an ionic liquid as a liquid hygroscopic material include an air treatment apparatus disclosed in Patent Document 1. This air treatment device includes two flow paths through which air passes and a device body that brings the air into contact with an ionic liquid (“ionic fluid” in Patent Document 1). The main body of the device is provided with two containers, and ionic liquids are stored in each container.

In this air treatment device, for example, in a humidification operation, outdoor air is taken in from one flow path and brought into contact with an ionic liquid stored in one container of the main body of the device to capture the moisture in the air. The air that has been supplemented with moisture and dried (dehumidified) is discharged to the outside of the room. In addition, outdoor air is taken in from the other flow path and comes into contact with the ionic liquid stored in the other container of the main body of the device. At this time, since the ionic liquid captures the water, the water is released from the ionic liquid to the air by being heated. As a result, the air is humidified and supplied to the room. Further, in the dehumidifying operation, the moisture in the indoor air is captured by the ionic liquid and returned to the room, and the captured moisture is released to the air from the outside and discharged to the outside.

By the way, as described in Patent Document 1, the ionic liquid has high heat resistance, is not flammable, is not flammable, has low volatility, is chemically stable, has high safety, and the like. It has the properties of. Therefore, ionic liquids have been attracting attention in recent years as an alternative solvent to existing solvents such as organic solvents or water, and their use in various applications has been proposed.

For example, Non-Patent Document 1 describes features common to ionic liquids, such as low melting point, non-volatile property, nonflammable or flame-retardant property, and ionic conductivity, as in Patent Document 1. , Cation and anion combinations, or selection of cation functional groups, have been described to produce a great many types of ionic liquids. Further, as application development of ionic liquid, application to industrial process, application to functional material, application to instrumental analysis, application to energy storage device, etc. are exemplified. In particular, in Non-Patent Document 1, the nonflammability or flame retardancy of an ionic liquid is described as follows.

Since an ionic liquid is composed only of ions, there are no uncharged neutral molecules in the liquid. As a result, in the ionic liquid, the phenomenon that the molecules in the liquid become a gas and are released from the surface, that is, evaporation or volatilization does not occur. Therefore, ionic liquids are non-volatile. This non-volatileity is retained until the ionic liquid reaches the pyrolysis temperature at high temperatures, so that the gas evaporated from the surface of the liquid is not supplied for combustion as in ordinary organic solvents. As a result, the ionic liquid will be nonflammable or flame retardant.

Japanese Unexamined Patent Publication No. 2006-142121

Hagi Principle, "Application Development of Ionic Liquids", Surface Technology, Surface Technology Association of Japan, February 2016, Vol. 67, No. 2, pp. 66-69

As mentioned above, ionic liquids have been considered to be non-volatile, non-flammable or flame-retardant in the common sense of technology. However, as a result of diligent studies by the present inventors, it has become clear that some ionic liquids are flammable.

The fact that a substance has flammability is a property that flammable vapor is generated from the substance and instantly ignites (ignites) when a flame is brought close to the vapor, and the substance is heated under predetermined conditions. The minimum temperature at which it ignites is the flash point. As mentioned above, the general knowledge is that ionic liquids are non-volatile and should not be flammable.

As described above, when there is an ionic liquid having flammability, the configuration of the air treatment apparatus disclosed in Patent Document 1 may not sufficiently cope with suppressing or preventing the ignition of the ionic liquid. As described above, since Patent Document 1 describes that the ionic liquid is neither flammable nor flammable and has low volatility, the configuration disclosed in Patent Document 1 corresponds to the flammability of the ionic liquid and the like. No consideration has been given to the configuration to be used.

If the ionic liquid is flammable, the handleability of the hygroscopic material itself containing such an ionic liquid is lowered. Moreover, in a humidity control system using such a hygroscopic material, various measures are required to cope with the flammability of the hygroscopic material. As a result, it becomes necessary to provide an additional configuration for the humidity control system, which may lead to complicated or costly configuration of the humidity control system.

The present invention has been made to solve such a problem, and it is possible to improve the handleability even by using a liquid moisture absorbing material containing an ionic liquid, and the structure thereof. It is an object of the present invention to provide a humidity control system capable of avoiding complications and the like, and an air conditioner provided with this humidity control system.

In the humidity control system using the liquid moisture absorbing material according to the present invention, in order to solve the above-mentioned problems, the moisture absorbing portion that absorbs the moisture contained in the air by the liquid moisture absorbing material and the moisture absorbed by the liquid moisture absorbing material are absorbed. The liquid moisture absorbing material includes a moisture-releasing portion that releases moisture into the air and a humidifying portion that dissipates the released moisture to the air to humidify the liquid, and the liquid moisture absorbing material is a liquid in the range of at least 0 ° C. to 5 ° C. A flammable abatement agent that raises the flash point of the ionic liquid and the companion obtained by compatibilizing the ionic liquid above the flash point of the ionic liquid, or eliminates the flash point of the companion. And, it is a configuration containing.

According to the above configuration, the liquid moisture absorbing material contains an ionic liquid as a main component and further contains a flammable abatement agent compatible with the ionic liquid. As a result, even if the ionic liquid, which is the main component of the liquid hygroscopic material, is flammable, the inclusion of a flammable abatement agent reduces or substantially reduces the flammability of the liquid hygroscopic material as a whole. It will be possible to eliminate it. As a result, the liquid hygroscopic material can realize good hygroscopicity, and can also realize good handleability because it is not necessary to substantially consider flammability. Further, by using such a liquid hygroscopic material, it is not necessary to take various measures for dealing with flammability in the humidity control system. Therefore, it is possible to avoid complication of the configuration of the humidity control system.

Further, the air conditioner according to the present disclosure may be configured to include the humidity control system described in the above configuration in order to solve the above problems.

In the present invention, with the above configuration, it is possible to improve the handleability even if a liquid moisture absorbing material containing an ionic liquid is used, and it is possible to avoid complication of the configuration and the like. It has the effect of being able to provide a humidity control system and an air conditioner equipped with this humidity control system.

It is a schematic diagram which shows an example of the typical structure of the humidity control system which concerns on Embodiment 1 of this invention. (A) is a schematic diagram showing an example of the configuration of the moisture absorbing portion included in the humidity control system shown in FIG. 1, and (B) shows an example of the configuration of the moisture releasing portion included in the humidity control system shown in FIG. It is a schematic diagram. It is a schematic diagram which shows the other configuration example of the humidity control system shown in FIG. It is a schematic diagram which shows the other structural example of the humidity control system shown in FIG. It is a schematic diagram which shows the other structural example of the humidity control system shown in FIG. (A) is a schematic diagram showing another example of the hygroscopic material flow path provided in the hygroscopic part shown in FIG. 2 (A), and (B) and (C) are the moisture-releasing parts shown in FIG. 2 (B). It is a schematic diagram which shows the other example of the hygroscopic material flow path provided with. It is a block diagram which shows an example of the control structure of the humidity control system which concerns on Embodiment 2 of this invention. It is a block diagram which shows the other configuration example of the humidity control system shown in FIG. 7. It is a block diagram which shows an example of the control structure of the humidity control system which concerns on Embodiment 3 of this invention. It is a schematic diagram which shows an example of the typical structure of the air conditioner which concerns on Embodiment 4 of this invention. It is a graph which shows the result of the typical example and the reference example of this invention.

The humidity control system using the liquid moisture absorbing material according to the present disclosure includes a moisture absorbing portion that absorbs moisture contained in the air by the liquid moisture absorbing material, and a moisture releasing portion that releases the moisture absorbed by the liquid moisture absorbing material into the air. The liquid moisture absorbing material comprises an ionic liquid which is a liquid in a range of at least 0 ° C. to 5 ° C. and a phase to the ionic liquid. A configuration containing a flammable abatement agent that raises the flash point of the companion obtained by melting above the flash point of the ionic liquid or eliminates the flash point of the companion. be.

According to the above configuration, the liquid moisture absorbing material contains an ionic liquid as a main component and further contains a flammable abatement agent compatible with the ionic liquid. As a result, even if the ionic liquid, which is the main component of the liquid hygroscopic material, is flammable, the inclusion of a flammable abatement agent reduces or substantially reduces the flammability of the liquid hygroscopic material as a whole. It will be possible to eliminate it. As a result, the liquid hygroscopic material can realize good hygroscopicity, and can also realize good handleability because it is not necessary to substantially consider flammability. Further, by using such a liquid hygroscopic material, it is not necessary to take various measures for dealing with flammability in the humidity control system. Therefore, it is possible to avoid complication of the configuration of the humidity control system.

The humidity control system having the above configuration further includes a control unit and a moisture absorption rate measuring unit for measuring or evaluating the moisture absorption rate of the liquid moisture absorbing material, and the control unit is based on the measurement result of the moisture absorption rate measuring unit. , The content of the flammable abatement agent contained in the liquid hygroscopic material may be adjusted.

According to the above configuration, the control unit adjusts the content of the flammable abatement agent based on the measurement result of the hygroscopicity measuring unit, so that the content of the flammable abatement agent can be kept within a more suitable range. can. This makes it possible to satisfactorily reduce the flammability of the liquid hygroscopic material while achieving good hygroscopicity.

Further, in the humidity control system having the above configuration, the flammable killing agent is water or an aqueous solution, and in the control unit, the content of the water in the liquid moisture absorbing material is 10 of the total amount of the ionic liquid and the water. The water content may be adjusted so as to exceed% by weight.

According to the above configuration, the control unit adjusts the amount of water, which is the ignition-killing agent (or the main component of the ignition-killing agent), to exceed 10% by weight of the total amount of the ionic liquid and water. This makes it possible to better reduce the flammability of the liquid hygroscopic material while achieving better hygroscopicity.

Further, in the humidity control system having the above configuration, the ionic liquid has a water content of more than 10% by weight after 1 hour has passed in a state where the relative humidity of the surroundings is in the range of 30 to 95%. It may be configured.

According to the above configuration, the liquid hygroscopic material can absorb moisture from the surroundings and accumulate a large amount of moisture when the humidity control system is not in the humidifying operation. Therefore, when the humidity control system starts the humidification operation, the accumulated water can be released at once to quickly humidify. Moreover, since water also has a function as a flammable killing agent, by accumulating a large amount of water during non-humidifying operation, the flammability of the liquid hygroscopic material is further reduced or the flammability is sufficiently eliminated. be able to.

Further, the humidity control system having the above configuration further includes a storage unit for storing the liquid moisture absorbing material and a circulation supply unit for circulating the liquid moisture absorbing material and supplying the liquid moisture absorbing material to the moisture absorbing portion and the moisture releasing portion. It may be configured to be present.

According to the above configuration, the liquid moisture-absorbing material can be circulated to the moisture-absorbing section and the moisture-releasing section by the circulation supply section, and the liquid moisture-absorbing material can be stored in the storage section.

Further, the humidity control system having the above configuration further includes a water condensing section for condensing the moisture released from the moisture releasing section, and the humidifying section is humidified using the moisture condensed by the water condensing section. It may be configured to be.

According to the above configuration, since the dehumidified water can be used as condensed water, it is not necessary to replenish the humidifying water from the outside, and excess water can be stored.

Further, in the humidity control system having the above configuration, the moisture discharging portion may be configured to release moisture from the liquid moisture absorbing material by heating the liquid moisture absorbing material that has absorbed moisture.

According to the above configuration, by heating the liquid hygroscopic material, moisture can be released more efficiently.

Further, in the humidity control system having the above configuration, the moisture absorbing portion and the moisture releasing portion may be integrated.

According to the above configuration, the configuration of the humidity control system can be simplified by integrating the moisture absorbing portion and the moisture releasing portion.

Further, the humidity control system having the above configuration includes a hygroscopic material temperature measuring device for measuring the temperature of the liquid hygroscopic material, a hygroscopic material heating unit for heating the liquid hygroscopic material, and a control unit. May be configured to control at least one of heating of the liquid hygroscopic material or heating of the hygroscopic material heating medium by the hygroscopic material heating unit based on the temperature of the liquid hygroscopic material.

According to the above configuration, since the operation of the hygroscopic material heating unit (heating of the liquid hygroscopic material by the hygroscopic material heating unit) is controlled based on the temperature of the liquid hygroscopic material, the temperature of the liquid hygroscopic material in the hygroscopic material is in a suitable range. Can be kept within. Therefore, it is possible to make the release of moisture from the liquid moisture-absorbing material more efficient, and it is possible to efficiently operate the moisture-absorbing material heating unit. As a result, energy saving of the humidity control system can be achieved.

Further, in the humidity control system having the above configuration, the moisture absorbing material heating unit has a PTC (Positive Temperature Coefficient) characteristic, and the moisture absorbing material heating unit is provided in the moisture releasing unit. May be.

According to the above configuration, since the hygroscopic material heating unit has PTC characteristics, further temperature rise is avoided when a certain temperature is reached. Therefore, even if there is no control from the control unit, the excessive temperature rise of the hygroscopic material heating unit is suppressed, and it is possible to avoid inadvertently heating the liquid hygroscopic material. In addition, the control configuration of the hygroscopic material heating unit can be simplified.

Further, in the humidity control system having the above-mentioned configuration, the moisture-releasing portion includes a humidified air temperature measuring device for measuring the temperature of the humidified air from which moisture is released from the liquid moisture-absorbing material, and the exposed air. The control unit includes at least one of a humidity measuring instruments for measuring the humidity of the moist air, and the control unit is the liquid moisture absorbing material by the moisture absorbing material heating unit based on at least one of the measured temperature and humidity of the humidified air. It may be configured to control the heating of the air.

According to the above configuration, the control unit controls the operation of the moisture absorbing material heating unit based not only on the temperature of the liquid moisture absorbing material but also on the temperature and / or humidity of the desorbed air. Thereby, the temperature of the liquid moisture absorbing material in the moisture releasing portion can be maintained within a more preferable range. Therefore, it is possible to further improve the efficiency of moisture release from the liquid hygroscopic material, and it is possible to efficiently operate the hygroscopic material heating unit.

Further, in the humidity control system having the above configuration, the moisture absorbing portion and the moisture releasing portion include a moisture absorbing material flow path for flowing the liquid moisture absorbing material, and the moisture absorbing material flow path has a plurality of internal paths thereof. When the total length of the flow path is the sum of the flow paths of all the flow paths in the path, the total length of the flow cross section of the moisture discharging portion is the flow cross section of the moisture absorbing portion. The configuration may be larger than the total length.

According to the above configuration, by making the total length of the flow cross section of the moisture releasing portion larger than the total length of the flow cross section of the moisture absorbing portion, the thickness of the liquid film of the liquid moisture absorbing material in the moisture absorbing portion becomes relatively small. Thereby, in the moisture-releasing portion, the moisture-releasing efficiency from the liquid moisture-absorbing material to the air can be improved.

Further, in the humidity control system having the above configuration, in the moisture absorbing material flow path provided in the moisture releasing portion, the liquid moisture absorption is performed at the end on the side where the liquid moisture absorbing material flows in in the direction in which the opening of the end is widened. The structure may be provided with a moisture-absorbing material developing portion that expands (diffuses) the material and introduces it into the opening.

According to the above configuration, by providing the moisture absorbing material developing portion, even if the total length of the flow cross section of the moisture discharging portion is relatively large and the opening area (flow cross section) of the moisture absorbing material flow path is relatively large, The liquid hygroscopic material can be satisfactorily introduced into the entire flow path of the hygroscopic material.

Further, the air conditioner according to the present disclosure may have a configuration including the humidity control system having the above configuration.

According to the above configuration, since the air conditioner includes the humidity control system, it is possible to perform humidity control as well as cooling and heating.

The humidity control system having the above configuration includes an indoor unit and an outdoor unit, and at least the moisture absorbing portion and the moisture releasing portion of the humidity control system are provided inside the outdoor unit. The moisture absorbing portion may be configured to absorb moisture in the air by the liquid hygroscopic material, the moisture absorbing portion may be used to recover the moisture from the liquid hygroscopic material, and the humidifying portion may be used to humidify the indoor air.

According to the above configuration, since the main configuration of the humidity control system is provided in the outdoor unit, the humidifying air can be recovered from the outside air and the indoor unit can be made compact.

Hereinafter, typical embodiments of the present invention will be described with reference to the drawings. In the following, the same or corresponding elements are designated by the same reference numerals throughout all the figures, and the overlapping description thereof will be omitted.

(Embodiment 1)
First, a typical configuration example of the humidity control system according to the present disclosure will be specifically described with reference to FIGS. 1 and 2 (A) and FIG. 2 (B).

[Example of humidity control system configuration]
As shown in FIG. 1, the humidity control system 10 according to the present embodiment includes a moisture absorbing section 11, a moisture releasing section 12, a humidifying section 13, a circulation supply section 14, and a storage section 15. The moisture discharging unit 12, the circulation supply unit 14, and the storage unit 15 are connected by a moisture absorbing material pipe 16. Further, the humidifying portion 13 is connected to the humidifying portion 12 via a humidifying pipe 17. A liquid hygroscopic material is circulated in the moisture absorbing material pipe 16, and the liquid hygroscopic material contains at least an ionic liquid as described later.

The moisture absorbing unit 11 absorbs moisture contained in the air with a liquid moisture absorbing material. The moisture releasing section 12 releases the moisture absorbed by the liquid moisture absorbing material into the air. The specific configuration of the moisture absorbing portion 11 and the moisture releasing portion 12 is not particularly limited, but in the present disclosure, the air contact portion 20 is provided on at least one of the moisture absorbing portion 11 and the moisture releasing portion 12. In the humidity control system 10 shown in FIG. 1, an air contact portion 20 is provided in both the moisture absorbing portion 11 and the moisture releasing portion 12.

The air contact portion 20 includes an air flow path 21, and by supplying a liquid hygroscopic material while flowing air through the air flow path 21, the liquid hygroscopic material and air are brought into contact with each other. When the air contact portion 20 is provided in the moisture absorbing portion 11, the liquid moisture absorbing material absorbs the moisture in the air by bringing the liquid moisture absorbing material into contact with the air. When the air contact portion 20 is provided in the moisture releasing portion 12, the moisture contained in the liquid moisture absorbing material is released to the air by bringing the liquid moisture absorbing material into contact with the air. A more specific configuration example of the air contact portion 20 will be described later.

The humidifying unit 13 humidifies the moisture released from the liquid hygroscopic material by the humidifying unit 12 by dissipating it into the air. In the present embodiment, the moisture absorbing portion 11 absorbs moisture from the outside air into the liquid moisture absorbing material and releases the moisture to the moisture releasing portion 12. Moisture released to the air flowing in the air flow path 21 in the humidifying section 12 is supplied to the humidifying section 13 via, for example, a humidifying pipe 17, so that the humidifying section 13 can use the supplied moisture, for example. Dissipate to humidify the room air. Therefore, the moisture absorbing section 11 and the moisture releasing section 12 function as a "moisture recovery section" for recovering water from the outside air, and the humidifying section 13 uses the moisture recovered by the "moisture recovery section" to collect indoor air. It will be humidified.

By providing the humidifying unit 13 separately from the humidifying unit 12, the water collected by the "moisture collecting unit" can be efficiently used for humidification, and it is not necessary to supply water from the outside for humidification. , It is possible to realize a maintenance-free or similar situation regarding humidification. Further, the humidifying unit 13 is provided with a hygrometer that measures the humidity in the room as needed, and may be configured to control the humidification according to the humidity. This enables suitable humidification according to the humidity in the room.

The circulation supply unit 14 circulates the liquid moisture absorbing material and supplies it to the air contact unit 20. The storage unit 15 stores the liquid moisture absorbing material. Note that FIG. 1 shows a state in which the liquid moisture absorbing material is stored inside the storage unit 15 as a schematic cross-sectional view. As shown in FIG. 1, since the moisture absorbing material pipe 16 is connected to the moisture absorbing portion 11 and the moisture releasing portion 12 to each other, the liquid moisture absorbing material is the moisture absorbing portion 11 via the moisture absorbing material pipe 16 by the circulation supply portion 14. And it can be distributed so as to circulate in the moisture releasing portion 12. In the present embodiment, the portion of the moisture absorbing material pipe 16 in which the liquid moisture absorbing material flows from the moisture absorbing portion 11 toward the moisture releasing portion 12 is referred to as a “first pipe 16a” for convenience of explanation, and is referred to as a moisture releasing portion 12. The portion through which the liquid moisture absorbing material flows from the moisture absorbing portion 11 to the moisture absorbing portion 11 is referred to as a “second pipe 16b” for convenience of explanation.

Here, in the schematic configuration shown in FIG. 1, the circulation supply unit 14 and the storage unit 15 are provided in the second pipe 16b, and the moisture release unit 12 passes through the storage unit 15 and the circulation supply unit 14. Although the liquid moisture absorbing material flows through the moisture absorbing portion 11, this configuration is for convenience, and the present disclosure is not limited to the configuration shown in FIG. For example, the circulation supply unit 14 may be provided in the first pipe 16a, may be provided in both the first pipe 16a and the second pipe 16b, and is limited to the first pipe 16a or the second pipe 16b. However, a plurality of circulation supply units 14 may be provided at any position of the moisture absorbing material pipe 16.

The storage unit 15 is not limited to the configuration shown in FIG. 1 as in the circulation supply unit 14. For example, the storage unit 15 may be provided in the first pipe 16a instead of the second pipe 16b, or a plurality of storage units 15 may be provided in any part of the moisture absorbing material pipe 16. Further, the storage unit 15 may be integrated into another configuration. For example, a storage unit 15 as a tank for storing the liquid moisture absorbing material may be provided in a part of the moisture absorbing unit 11 or the moisture releasing unit 12.

In the humidity control system 10 according to the present disclosure, more specific configurations of the moisture absorbing section 11, the moisture releasing section 12, the humidifying section 13, the circulation supply section 14, the storage section 15, the moisture absorbing material pipe 16, and the humidifying pipe 17 are Not particularly limited, various known configurations can be preferably used. The moisture absorbing portion 11 and the moisture releasing portion 12 may be provided with at least an air contact portion 20, and the moisture absorbing portion 11 or the moisture releasing portion 12 may be provided with a configuration other than the air contact portion 20 or may be provided with a configuration other than the air contact portion 20. It may be composed of only a part 20. If the moisture absorbing portion 11 or the moisture releasing portion 12 is composed of only the air contact portion 20, the humidity control system 10 includes the "first air contact portion 20" serving as the moisture absorbing portion 11 and the moisture releasing portion 12. It can also be said that the "second air contact portion 20" is provided.

The more specific configuration of the air contact portion 20 is not particularly limited as in the moisture absorbing portion 11, the moisture releasing portion 12, the humidifying portion 13, and the like, but as a typical configuration, for example, FIG. 2A or FIG. As shown in (B), a configuration can be mentioned which is arranged along the vertical direction and includes a moisture absorbing material flow path 22 in which the liquid moisture absorbing material flows in from above and flows out from below. For example, in the case of the moisture absorbing portion 11, as shown in FIG. 2A, the second piping 16b and the first piping 16a of the moisture absorbing material pipe 16 are located above and vertically between them. A configuration in which the hygroscopic material flow path 22 is located along the direction can be mentioned.

At this time, the air flow path 21 included in the air contact portion 20 may be arranged along the vertical direction as in the moisture absorbing material flow path 22, but as shown in FIG. 2A, the air flow path 22 is connected to the moisture absorbing material flow path 22. It may be provided so as to intersect. In the example shown in FIG. 2A, the air flow path 21 is provided so as to be orthogonal to the hygroscopic material flow path 22. Therefore, air flows from the horizontal direction with respect to the liquid hygroscopic material flowing in the vertical direction. As a result, the liquid moisture absorbing material and the air can be brought into good contact with each other.

Similar to the moisture absorbing portion 11 illustrated in FIG. 2A, the moisture absorbing material flow path 22 is arranged along the vertical direction in the moisture releasing portion 12 exemplified in FIG. 2 (B), and the air flow path 21 is the moisture absorbing material. It suffices if they are arranged so as to intersect the flow path 22 (in the directions orthogonal to each other in FIG. 2B). In the moisture discharging section 12, since the moisture contained in the liquid moisture absorbing material is dissipated, the first pipe 16a is located above and the second pipe 16b is located below. In addition, in FIG. 2A and FIG. 2B, the flow method of the liquid moisture-absorbing material in the moisture-absorbing material flow path 22 is illustrated by arrow c0. Other arrows will be described in the operation example of the humidity control system 10 described later.

Further, as shown in FIG. 2B, for example, a hygroscopic material heating unit 24 may be provided on the upstream side of the hygroscopic material flow path 22. By heating the liquid moisture-absorbing material absorbed by the moisture-absorbing material heating unit 24, it is possible to make it easier to release moisture from the liquid moisture-absorbing material. The position of the moisture-absorbing material heating unit 24 is not particularly limited, and may be provided in the first pipe 16a, may be provided at a position on the upstream side of the moisture-absorbing material flow path 22, the first pipe 16a and the moisture-absorbing material. A heating region may be provided between the flow paths 22, and the hygroscopic material heating unit 24 may be arranged in this heating region.

Further, the method for heating the liquid hygroscopic material by the hygroscopic material heating unit 24 is not particularly limited. In the configuration schematically shown in FIG. 2B, since the hygroscopic material heating unit 24 is provided in the first pipe 16a, the liquid hygroscopic material flowing in the first pipe 16a is indirectly or directly (heated region). , Etc.). Further, if the hygroscopic material heating unit 24 is provided at a position on the upstream side of the hygroscopic material flow path 22, the liquid hygroscopic material flowing into the hygroscopic material flow path 22 may be indirectly or directly heated.

Alternatively, although not shown, the hygroscopic material heating unit 24 may be configured to blow a hot air flow into the air flow path 21. In the example shown in FIG. 2B, as described above, air flows from the horizontal direction along the air flow path 21 with respect to the liquid moisture absorption material flowing in the vertical direction along the moisture absorption material flow path 22, but the air absorbs moisture. The hot air flow of the material heating unit 24 may be blown so as to intersect each of the flow direction and the air flow trend of the liquid hygroscopic material. In the example shown in FIG. 2B, a configuration in which air is blown in the direction perpendicular to the paper surface can be mentioned. In this case, the flow direction of the liquid moisture absorbing material, the flow direction of air, and the blowing direction of the hot air flow are all orthogonal to each other.

The specific configuration of the air flow path 21 or the moisture-absorbing material flow path 22 is not particularly limited, as long as the air or liquid moisture-absorbing material is flowable and the air and liquid moisture-absorbing material are contactable. In particular, in the present embodiment, the air flow path 21 may be a normal tubular member, but the moisture absorbing material flow path 22 is space-filled in order to improve the contact frequency between the flowing liquid moisture absorbing material and air. It may be configured as long as it is composed of the solid 23 itself, or the space-filling solid 23 is filled in the tubular member.

The specific configuration of the space-filling solid 23 is not particularly limited, but typically, a configuration in which a hollow columnar body is filled along the flow direction of the liquid moisture absorbing material can be mentioned, and more specifically, for example. , Honeycomb structure can be mentioned. Since the space-filling solid 23 such as the honeycomb structure has a very large surface area as compared with a simple tubular member, the moisture absorbing material flow path 22 can be configured as a “high surface area portion”. This makes it possible to bring the liquid moisture absorbing material into contact with air at a high frequency, and to efficiently absorb and release moisture.

When the space-filling solid 23 is a honeycomb structure, the honeycomb structure may generally be a structure in which hollow regular hexagonal columns are arranged in parallel without gaps. However, the cross-sectional shape of the honeycomb structure is not necessarily limited to a regular hexagon, and may be a shape similar to a regular hexagon, or may be another cross-sectional shape that is usually regarded as “honeycomb shape”. The honeycomb structure in the present embodiment is not limited to a structure having a regular hexagonal cross-sectional shape in a narrow sense, and may be a structure in a broad sense including a similar shape or the like. Further, the cross section of the columnar body is not limited to one type, and a columnar body having a plurality of types of cross sections may be filled.

If the space-filling solid 23 is configured to fill a columnar body such as a honeycomb structure, air flows in a direction intersecting (or orthogonal to) the longitudinal direction of the columnar body (that is, the flow direction of the liquid moisture absorbing material). It suffices if the liquid moisture absorbing material is provided with a structure that allows air to come into good contact with the material. As a typical example, a configuration in which a through hole such as a slit through which air can flow can be provided in the intersecting direction of the honeycomb structure can be mentioned.

Further, when the space-filling solid 23 is not a structure for filling a columnar body but a structure for filling a polyhedron, the liquid moisture absorbing material is located on a wall surface where the polyhedra are adjacent to each other and is in the flow direction of the liquid moisture absorbing material. It suffices to form a through hole to the extent that the water can flow. Further, the positions of the through holes do not necessarily have to be provided so as to be continuous along the flow direction, and the positions of the through holes adjacent to the flow direction may be intentionally shifted. This makes it possible to bend the flow of the liquid hygroscopic material and improve the frequency of contact with air.

Further, the moisture absorbing material flow path 22 is not limited to the configuration filled with the space-filling solid 23, and is other as long as it functions as a “high surface area portion” that allows air to be in good contact with the flowing liquid moisture absorbing material. The configuration can be adopted. For example, a plurality of linear bodies, rod-shaped bodies, or plate-shaped bodies are arranged in parallel along the stretching direction of the moisture-absorbing material flow path 22 (that is, the flow direction of the liquid moisture-absorbing material), and these linear bodies, rod-shaped bodies, or plate-shaped bodies are arranged in parallel. Examples thereof include a configuration in which a liquid moisture absorbing material is circulated so as to be transmitted to the body, and air is circulated in a direction intersecting (or orthogonal to) a linear body, a rod-shaped body, or a plate-shaped body.

Further, if the linear body, rod-shaped body, or plate-shaped body is regarded as a "parallel arrangement member" to be arranged in parallel with the hygroscopic material flow path 22 for convenience of explanation, the surface of these parallel arrangement members is smooth. However, a physical shape such as an uneven shape, a hole shape, or a crack shape may be formed on the surface thereof. When the surface of the parallel arrangement member has a physical shape such as an uneven shape, a hole shape, or a crack shape, the surface area of the parallel arrangement member is increased. As a result, the contact between the liquid moisture absorbing material and the air is promoted, so that the efficiency of moisture absorption and desorption is improved.

The specific configuration of the physical shape formed on the surface of the parallel arrangement member is not particularly limited. For example, examples of the concavo-convex shape include a shape in which the line of the linear body undulates (winds and undulates), a shape in which the rod of the rod-like body undulates, and a shape in which the plate of the plate-like body undulates. Examples of the hole shape include a shape in which a plurality of holes are formed on the surface of the parallel arrangement member, a configuration in which the parallel arrangement member itself is formed of a porous body, and the like. Examples of the crack shape include a branch of a line or a rod, a crack formed in a part of a plate-like body, and the like. Only one type of these physical shapes may be formed with respect to the parallel arrangement member, or two or more types may be formed in combination.

[Liquid hygroscopic material]
Next, the liquid hygroscopic material suitably used for the humidity control system 10 according to the present disclosure will be specifically described.

The liquid moisture absorbing material according to the present disclosure may be a liquid at least in the range of 0 ° C. to 5 ° C. and may contain an ionic liquid whose viscosity decreases depending on the water content (moisture absorption rate). In the present disclosure, the flash point of the companion obtained by being compatible with the ionic liquid is raised above the flash point of the ionic liquid, or the flash point of the companion is eliminated. Contains an abatement agent. The water content is defined as a percentage (%) of the weight of water with respect to the total weight of the ionic liquid and water. That is, the water content is the weight% of water when the total amount of the ionic liquid and water is 100% by weight. The specific method for measuring the water content is not particularly limited, and a known method based on weight (or mass) may be used.

The ionic liquid is a liquid composed of anions and cations, and is said to refer to an ionic substance having a melting point of 300 ° C. or lower or 100 ° C. or lower, but the melting point is not necessarily limited as long as it is a liquid under the conditions of use. In the present disclosure, since it is used as a hygroscopic material in the humidity control system 10, it is an ionic substance that is a liquid in a temperature range of at least 0 ° C. to 5 ° C. based on the usage conditions of the humidity control system 10. All you need is. When the liquid hygroscopic material according to the present disclosure contains an ionic liquid that is not liquid in this temperature range, the moisture absorbing portion 11 may absorb moisture or the moisture releasing portion 12 may release the moisture absorbed, especially in winter. The humidity control system 10 cannot operate satisfactorily.

If the temperature range of 0 ° C. to 5 ° C. is defined as the "required temperature range" for convenience, the temperature range in which the ionic liquid is a liquid in the present disclosure may include the required temperature range, and the upper limit and the lower limit thereof are particularly limited. Not done. The upper limit may be, for example, a temperature range within or above normal temperature (20 ° C. ± 15 ° C., that is, 5 ° C. to 35 ° C.). If the ionic liquid is a liquid in a temperature range including normal temperature, the humidity control system 10 can be operated satisfactorily even at that temperature. Further, as the lower limit, for example, −20 ° C. or higher can be mentioned. If the ionic liquid is liquid at −20 ° C. or higher, the humidity control system 10 can be operated well even in most cold regions.

In the present disclosure, the ionic liquid may not be a liquid in another temperature range as long as it is a liquid within the required temperature range. Since the required temperature range in the present disclosure is the temperature range assumed in winter, the ionic liquid which is a liquid within the required temperature range is almost always a liquid even at room temperature.

In the liquid hygroscopic material according to the present disclosure, as described above, the ionic liquid may have a viscosity whose viscosity decreases depending on its water content. That is, the ionic liquid used in the present disclosure may have a high viscosity if the water content is low and a low viscosity if the water content is high. If the ionic liquid has a low water content and a high viscosity, the moisture absorbing unit 11 can supply a liquid moisture absorbing material having a high viscosity. As a result, the contact time between the air to be absorbed and the liquid moisture absorbing material can be satisfactorily secured. Further, if the ionic liquid has a high water content and a low viscosity, the viscosity of the moisture-releasing portion 12 increases due to the decrease in the water content, so that the contact time for sufficiently dissipating the moisture contained in the liquid moisture-absorbing material into the air. Can be secured. The specific viscosity of the ionic liquid is not particularly limited as long as it is within a range in which an appropriate fluidity can be realized.

The specific type of ionic liquid is not particularly limited. In general, an ionic liquid can be freely molecularly designed depending on the specific structure of the cation or anion, the combination of the cation and the anion, and the like, depending on the purpose of use. However, the relationship between the physical characteristics of ionic liquids and the structure of cations or anions has not yet been fully elucidated. Therefore, in the present disclosure, as described above, a liquid in the required temperature range may be used. However, the molecular weight of the ionic liquid may be in the range of 100 to less than 300.

According to the diligent studies of the present inventors, it is desirable that the ionic liquid desirable as a moisture absorbing material has a moderate ionic strength between cations and anions, and it is not desirable that the ionic strength is too strong or too weak. If the molecular weight of the ionic liquid is less than 100 or more than 300, the cation or anion molecule may be too small or too large to obtain moderate ionic strength, and good moisture absorption performance may not be obtained. There is.

The more specific type of ionic liquid is not particularly limited. Typical cations include, for example, imidazolium, pyridinium, pyrrolidinium, ammonium, phosphonium, morpholinium, piperidinium, sulfonium and the like. Among these, imidazolium, pyridinium, pyrrolidinium, ammonium and phosphonium can be preferably used. Further, only one type of cation may be selected, or a plurality of types of cations may be mixed and used.

Specific examples of the imidazolium include 1-butyl-3-methylimidazolium, 1-butyl-3-dodecylimidazolium, 1-butyl-2,3-dimethylimidazolium, 1,3-dimethylimidazolium, and the like. 1,2-dimethyl-3-propylimidazolium, 2,3-dimethyl-1-propylimidazolium, 1-decyl-3-methylimidazolium, 1-ethyl-3-methylimidazolium, 1-ethyl-2, 3-Dimethylimidazolium, 1-hexyl-3-methylimidazolium, 1- (2-hydroxyethyl) -3-methylimidazolium, 1- (3-hydroxypropyl) -3-methylimidazolium, 1-hexyl- 3-Methyl imidazolium, 1-methyl-3-propyl imidazolium, 1-methyl-3-octyl imidazolium, 1-methyl-3-pentyl imidazolium, 1-allyl-3-methyl imidazolium, 1-dodecyl- Examples thereof include 3-methylimidazolium, but the present invention is not particularly limited.

Specific pyridiniums include, for example, 1-ethylpyridinium, 1-propylpyridinium, 1-butylpyridinium, 1-hexylpyridinium, 1-octylpyridinium, 1-butyl-3-methylpyridinium, 1-butyl-4. -Methylpyridinium, 1-hexyl-4-methylpyridinium, 1-ethyl-3- (hydroxymethyl) pyridinium, 1-octyl-4-methylpyridinium and the like can be mentioned, but are not particularly limited.

Specific examples of the pyrrolidinium include 1-methyl-1-propylpyrrolidinium, 1-ethyl-1-methylpyrrolidinium, 1-butyl-1-methylpyrrolidinium and 1- (2-methoxy). Ethyl) -1-methylpyrrolidinium and the like can be mentioned, but the present invention is not particularly limited.

Specific examples of ammonium include trimethylpropylammonium, butylmethylammonium, diethyl (methyl) propylammonium, amyltriethylammonium, methyltrioctylammonium, trimethylhexylammonium, tributylmethylammonium, tetrapentylammonium, and cyclohexyltrimethylammonium. , Tetrapropylammonium, Tetrabutylammonium, Tetrahexylammonium, Tetraheptylammonium, Tetraoctylammonium, Tetraamylammonium and the like, but are not particularly limited.

Specific examples of the phosphonium include tributylmethylphosphonium, tributyloctylphosphonium, tributylhexadecylphosphonium, tributyldodecylphosphonium, tributyl (2-methoxyethyl) phosphonium, trihexyl (tetradecyl) phosphonium, tetrabutylphosphonium and tetraoctylphosphonium. Etc., but are not particularly limited.

Typical anions include halogen ions such as ^Cl- , Br- ^{, and} I-; nitrogen oxide-based (NO-based) ions such as NO _2- ^and NO _3- , ^and BF _4- ^, PF _6- ^, and AlCl _4- . Halogen ^- based inorganic acid ions such as-, AsF _6- ^, SbF _6- ^, NbF _6- ^, TaF _6- ^, etc.; ₍ CH ₃ O) HPO _2- ^, CH ₃ PO _3- ^, etc. ) ₂ PO _2- ^, (C ₂ H ₅ O) ₂ PO _2- ^, etc. phosphate-based ions; CH ₃ COO- ^, CH ₃ SO _3- ^, CH ₃ CH ₂ OSO _3- ^, etc. Organic acid ions; CF ₃ Halogen ^- based organic acid ions such as COO- ^, CF ₃ SO _3- ^, (CF ₃ SO ₂ ) ₃ C- ^, CF ₃ CF ₂ CF ₂ COO- ^, CF ₃ CF ₂ CF ₂ CF ₂ COO-; (CF ₃ SO) ₂ ) ₂ N- ^, (CF ₃ CF ₂ SO ₂ ) ₂ N- ^, (CF ₃ SO ₂ ) (CF ₃ CO) N- ^, (CN) ₂ N ^- etc. Not limited.

Specific ionic liquids preferably used in the present disclosure include, typically, a combination of a cation having a short substituted carbon chain (total number of carbon atoms is 6 or less) and a carboxylic acid-based or phosphonic acid-based anion. be able to. More specifically, for example, 1-ethyl-3-methylimidazolium acetate, 1-ethyl-3-methylimidazolium ethyl sulfate, 1-ethyl-3-methylimidazolium methanesulfonate, 1-ethyl- 3-Methylimidazolium trifluoromethanesulfonate, 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium dicyanamide, 1-ethyl-3-methylimidazolium dimethylphosphate, 1- Examples thereof include ethyl-3-methylimidazolium ethyl phosphate, 1-ethyl-3-methylimidazolium methylphosphonate and the like.

As described above, the flammable abatement agent can be compatible with the above-mentioned ionic liquid, and the flash point of the companion obtained by being compatible with the ionic liquid is the flash point of the ionic liquid. It may be higher than that (reduces flammability) or eliminates the flash point of the companion (eliminates flammability). Further, since the ionic liquid used in the liquid moisture absorbing material according to the present disclosure is a liquid in the range of 0 ° C to 5 ° C as described above, the flammable abatement agent is also a liquid in the range of 0 ° C to 5 ° C. It is preferable to have.

The specific type of the flammable killing agent is not particularly limited, but water or an aqueous solution can be typically mentioned. In other words, the liquid hygroscopic material according to the present disclosure can reduce or eliminate flammability even if the ionic liquid as the main component has flammability as long as it absorbs water to some extent. Become. Even when the flammable abatement agent is an aqueous solution, the specific type of the aqueous solution is not particularly limited. Any aqueous solution may be used as long as the aqueous solution is compatible with the ionic liquid and can reduce the flammability of the ionic liquid. Further, depending on the type of the aqueous solution, it is possible to impart additional properties to the liquid hygroscopic material. Therefore, by appropriately selecting the solute of the aqueous solution, it is possible to impart desired properties to the liquid hygroscopic material.

In the liquid moisture absorbing material according to the present disclosure, the content of the flammable killing agent is not particularly limited, and may be any amount as long as it can reduce or eliminate the flammability of the ionic liquid when the ionic liquid has flammability. The lower limit of the typical content is 20% by weight, as long as it exceeds 10% by weight with respect to the total amount of the ionic liquid and the flammable abatement agent contained in the liquid hygroscopic material. % Or more, or 30% by weight or more. On the other hand, the upper limit of the content may be 80% by weight or less, 50% by weight or less, or 40% by weight or less with respect to the total amount of the ionic liquid and the flammable abatement agent. .. In other words, when the total weight of the ionic liquid and the flammable abatement agent to be blended in the liquid moisture absorbing material is 100 parts by weight, the amount of the flammable abatement agent in 100 parts by weight exceeds at least 10 parts by weight and 80 parts by weight. It is preferable that the mixture is formulated as follows.

As shown in Examples described later, the flash point of the ionic liquid is significantly increased even when the content (blending amount) of the flammable killing agent is 10% by weight or less of the total amount of the ionic liquid and the flammable killing agent. Therefore, the flammability of the ionic liquid can be reduced. Further, when the content (blending amount) of the flammable abatement agent is close to 10% by weight, the flash point of the ionic liquid can be eliminated, and the flammability of the ionic liquid can be substantially eliminated. .. Therefore, it is possible to reduce the flammability by adding a small amount of the flammable abatement agent to the ionic liquid, but it is preferable to add an amount of more than 10% by weight to substantially eliminate the flammability. can.

The flammable abatement agent may be premixed with the liquid hygroscopic material. Therefore, the liquid hygroscopic material according to the present disclosure may be any material containing an ionic liquid and a flammable abatement agent. However, when the flammable killing agent is water or an aqueous solution, the content of the flammable killing agent can be adjusted by adjusting (controlling) the amount of moisture absorbed and released from the liquid hygroscopic material. In this case, the water absorbed by the liquid hygroscopic material is a "component to be absorbed" as seen from the liquid hygroscopic material and is also a "flammable abatement agent" of the ionic liquid which is the main component. Therefore, in the liquid hygroscopic material according to the present disclosure, the content (blending amount) of water or an aqueous solution, which is a flammable abatement agent, may be adjusted during use or may be blended at the time of use.

Here, if the content (blending amount) of the flammable abatement agent becomes too large, the hygroscopic performance of the liquid hygroscopic material may be affected, depending on various conditions such as the type of the ionic liquid. Therefore, from the viewpoint of obtaining good hygroscopic performance, the content (blending amount) of the flammable abatement agent is preferably 80% by weight or less as described above. In particular, if the flammable killing agent is water or an aqueous solution, the upper limit of the content (blending amount) of the flammable killing agent may be 90% or less based on the saturated hygroscopicity of the liquid hygroscopic material (100%). ..

When the liquid hygroscopic material is left at an arbitrary temperature and an arbitrary humidity, the hygroscopicity of the liquid hygroscopic material converges to a predetermined value and is maintained. This is defined as the saturated moisture absorption rate of the liquid moisture absorbing material. Therefore, it can be said that the saturated hygroscopicity of the liquid hygroscopic material is the ratio of the moisture absorption amount (moisture amount) realized when the liquid hygroscopic material is left at an arbitrary temperature and an arbitrary humidity. For example, when the liquid hygroscopic material is composed of 1-ethyl-3-methylimidazolium acetate, which is an ionic liquid, the temperature (environmental temperature) and relative humidity (environmental temperature) in the usage environment (use atmosphere) of the liquid hygroscopic material (use atmosphere). When (environmental humidity) is an arbitrary value, the saturated hygroscopicity is as shown in Table 1 below.

In Table 1 above, for example, when the environmental temperature is 20 ° C. and the environmental relative humidity is 50%, the saturated hygroscopicity of the liquid hygroscopic material is 39% by weight. Therefore, at such an environmental temperature and an environmental relative humidity, the upper limit of the flammable abatement agent contained in the liquid moisture absorbing material is 90% of the moisture absorption rate of 39% by weight, so that it is 35.1% by weight (= 39% by weight). × 0.9) It may be less than or equal to. Further, as described above, it is possible to adjust the content (blending amount) of the flammable abatement agent (water) by adjusting (controlling) the moisture absorption / desorption amount (water absorption amount) of the liquid moisture absorbing material. .. Therefore, from the viewpoint of balancing the flammability of the liquid hygroscopic material with the hygroscopicity of the liquid hygroscopic material, the water content of the liquid hygroscopic material should be adjusted to a suitable range when the liquid hygroscopic material is used. May be good.

As is clear from Table 1, the amount of hygroscopicity of the liquid hygroscopic material (ionic liquid which is the main component) decreases when the environmental temperature becomes high. Therefore, from the viewpoint of setting a preferable upper limit of the flammable abatement agent, the environmental temperature may be assumed to be at room temperature or a temperature range close to the normal temperature based on at least the usage conditions. Normally, the normal temperature is 20 ° C ± 15 ° C (5 ° C to 35 ° C), but considering the conditions for using the liquid hygroscopic material, at least the temperature range of 0 ° C to 5 ° C should be considered on the low temperature side. It is preferable to consider at least a temperature range of 60 to 65 ° C. on the high temperature side. Therefore, as a preferable range of the environmental temperature for setting the upper limit of the flammable abatement agent, the range of 0 ° C. to 65 ° C. can be mentioned.

Further, the range of the environmental relative humidity preferable for setting the upper limit of the flammable reducing agent can be set in the same manner as the environmental temperature. Generally, "normal humidity" is in the range of 45% to 85%, but considering the conditions of use of the liquid hygroscopic material, low humidity up to 10% and high humidity up to 90% are considered. Is preferable. Therefore, a preferred range of environmental relative humidity for setting the upper limit of flammable abatement can be in the range of 10% to 90%.

As described above, the liquid moisture absorbing material according to the present disclosure contains an ionic liquid which is a liquid at least in the range of 0 ° C. to 5 ° C. as a main component, and further contains a flammable abatement agent which is compatible with the ionic liquid. ing. As a result, even if the ionic liquid, which is the main component of the liquid hygroscopic material, is flammable, the inclusion of a flammable abatement agent reduces or substantially reduces the flammability of the liquid hygroscopic material as a whole. It will be possible to eliminate it. As a result, the liquid hygroscopic material can realize good hygroscopicity, and can also realize good handleability because it is not necessary to substantially consider flammability.

The liquid moisture absorbing material according to the present disclosure may contain the above-mentioned ionic liquid and flammable killing agent, but may contain components other than the ionic liquid and the flammable killing agent. Therefore, the liquid moisture absorbing material according to the present disclosure may be a composition composed of an ionic liquid and a flammable killing agent, or a composition containing an ionic liquid and a flammable killing agent and containing other components. May be. Specific other components are not particularly limited, and examples thereof include known additives such as flame retardants, colorants, flavoring agents (fragrances), fungicides, antifoaming agents, and viscosity modifiers. Further, although two or more kinds of ionic liquids may be used, a hygroscopic agent (desiccant) other than the ionic liquid may be mixed.

Among these, a flame retardant can be mentioned as a typical other component. As described in Patent Document 1, ionic liquids have been considered to have non-volatile, non-flammable or flame-retardant properties in the common general technical sense. However, as a result of diligent studies by the present inventors, it has become clear that some ionic liquids are flammable. Therefore, the liquid hygroscopic material according to the present disclosure preferably contains a flame retardant, depending on the type of ionic liquid.

As the flame retardant, a known flame retardant can be preferably used as long as it can be dissolved or dispersed in the ionic liquid, although it depends on the type of the ionic liquid. Specific examples of the flame retardant include halogen-based flame retardants, phosphorus-based flame retardants, inorganic flame retardants, antimony-based flame retardants, silicone compounds, hindered amine compounds, organic metal compounds, nitrogen-containing compounds and the like. Not particularly limited. Only one kind of these flame retardants may be used, or two or more kinds may be appropriately combined.

More specific flame retardants include, for example, tetrabromobisphenol A (TBBA), TBBA-bis (dibromopropyl ether), decabromodiphenyl ether (Deca-BDE), tribromofer, and bis (penta) as halogen-based flame retardants. Bromophenyl) ether, 1,2-bis (2,4,6-tribromophenoxy) ethane, hexabromocyclododecane (HBCD), ethylenebis (tetrabromophthalimide), poly (dibromophenol), hexabromobenzene (HBB) ), Bromine-based flame retardants such as polybrominated diphenyl ether (PBDE); chlorine-based flame retardants such as chlorinated paraffin, chlorocycloalkane-based (trade name: dechloran), and chlorendic acids.

Further, for example, examples of the phosphorus-based flame retardant include triphenyl phosphate (TPP), tricresyl phosphate (TCP), trixylenyl phosphate (TXP), cresyldiphenyl phosphate (CDP), 2-ethylhexyldiphenyl phosphate, and t-butyl. Aromatic phosphate esters such as phenyldiphenyl phosphate, bis (t-butylphenyl) phenyl phosphate, tris (t-butylphenyl) phosphate, isopropylphenyldiphenyl phosphate, bis (isopropylphenyl) diphenyl phosphate, tris (isopropylphenyl) phosphate; Condensed phosphate esters such as bisphenol A bis-diphenyl phosphate (BDP), resorcinol bis-diphenyl phosphate (RDP), resorcinol bis-dixylenyl phosphate (RDX), biphenyl bis-diphenyl phosphate; Tris (dichloropropyl) phosphate, Triscro (Β-Chloropropeel), halogen-containing phosphoric acid esters such as trischloroethyl phosphate or halogen-condensed phosphoric acid esters containing; polyphosphates; red phosphorus; phosphoric acid ester amides; and the like.

Further, for example, examples of the inorganic flame retardant include metal hydroxide compounds such as aluminum hydroxide and magnesium hydroxide; zinc compounds such as zinc borate, zinc stannate and zinc sulfide; zeolite, titanium oxide, silica and carbon. Nanofillers; antimony compounds such as antimony trioxide, antimony pentoxide, antimony tetroxide, sodium antimonate; molybdenum compounds; and the like can be mentioned.

Further, for example, examples of the nitrogen-containing compound include a guanidine compound such as guanidine sulfamate; a melamine compound such as melamine sulfate; and the like.

In the liquid hygroscopic material according to the present disclosure, the content of these flame retardants is not particularly limited, and may be an amount sufficient to impart flame retardancy to the liquid hygroscopic material containing an ionic liquid as a main component. Generally, in a material containing a flame retardant, the content of the flame retardant in the material is defined as a blending amount of the flame retardant based on the weight of the material to be flame retardant. Therefore, also in the present disclosure, the content of the flame retardant in the liquid hygroscopic material is defined as the blending amount based on the ionic liquid.

In the liquid hygroscopic material according to the present disclosure, as an example of the blending amount of the flame retardant, for example, the range of 1 to 50 parts by weight with respect to 100 parts by weight of the ionic liquid contained in the liquid hygroscopic material can be mentioned. In other words, the flame retardant may be blended in the range of 1% by weight or more and 50% by weight or less with respect to the weight of the ionic liquid contained in the liquid hygroscopic material.

Further, the preferable lower limit of the blending amount of the flame retardant may be 3% by weight (3 parts by weight) or more with respect to the weight (100 parts by weight) of the ionic liquid, and 5% by weight (5 parts by weight) or more. There may be. Further, the preferable upper limit of the blending amount of the flame retardant may be 40% by weight (40 parts by weight) or less with respect to the weight (100 parts by weight) of the ionic liquid, and 35% by weight (35 parts by weight) or less. It may be present, and may be 30% by weight (30 parts by weight) or less. The range of the preferable blending amount can be appropriately set depending on the type of the flame retardant.

Further, in the liquid moisture absorbing material according to the present disclosure, as described above, the ionic liquid which is the main component is a liquid in the range of at least 0 ° C to 5 ° C, and its viscosity depends on the water content (moisture absorption rate). Any one containing a decreasing ionic liquid may be used. In the present disclosure, it is preferable that the ionic liquid as the main component has a saturated water content of more than 20% by weight in the range of 0 ° C to 5 ° C (saturated water content condition), and the relative humidity of the surroundings. It is preferable that the water content exceeds 10% by weight (ambient humidity water content condition) after 1 hour has passed in a state where the water content is in the range of 30 to 95%.

When the ionic liquid satisfies at least one of these saturated moisture content conditions and ambient humidity moisture content conditions, the liquid hygroscopic material absorbs moisture from the surroundings and accumulates a large amount of water when the humidity control system 10 is not in the humidifying operation. be able to. Therefore, when the humidity control system 10 starts the humidification operation, the accumulated water can be released at once to quickly humidify. Further, in the present disclosure, water or an aqueous solution can be used as a typical flammable killing agent (in other words, the absorbed water has a function of a flammable killing agent), so that when the humidifying operation is not performed. By accumulating a large amount of water, it is possible to further reduce the flammability of the liquid hygroscopic material or to sufficiently eliminate the flammability.

The ambient humidity moisture content condition is a moisture content defined based on the relative humidity of the surroundings. Therefore, in the present disclosure, the ambient humidity water content condition is evaluated by the method for measuring the water content described below, which is different from the general method for measuring the water content. Specifically, the ionic liquid to be measured is placed in a petri dish so that the film thickness is about 0.6 mm and allowed to stand in a constant temperature and humidity chamber adjusted to a temperature of 5 ° C. and a humidity of 50%. At this time, the initial water content of the ionic liquid is 0.5% by weight or less. Then, the weight change of the ionic liquid when left at a wind speed of 2 m / sec for 1 hour is measured. This weight change (weight increase) is determined as the moisture absorption amount of the ionic liquid, and the weight change rate is calculated as the water content (hygroscopicity) of the ionic liquid.

In this method for measuring the water content, triethylene glycol can be used as a standard substance, and the validity of the measurement of the water content of the ionic liquid to be measured can be judged (that is, the measurement of the water content of the triethylene glycol can be measured by ions. Can be treated as a control experiment for measuring the water content of a liquid). If the water content of triethylene glycol is within the range of 9 to 13% by weight by this measuring method, it can be judged that the measurement result of the water content of the ionic liquid is accurate.

[Operation example of humidity control system]
Next, an example of the operation of the humidity control system 10 having the above configuration will be specifically described with reference to FIGS. 1 and 2.

First, as shown by the shaded double-line block arrow A1 in FIG. 1, low-temperature and high-humidity air is introduced into the air contact portion 20 provided in the moisture absorbing portion 11. If this is referred to as low-temperature and high-humidity air A1, the low-temperature and high-humidity air A1 may be, for example, outside air, and the humidity control system 10 may have a known configuration capable of introducing such outside air. The low temperature and high humidity air A1 flows into the air flow path 21 of the air contact portion 20. In the present embodiment, as shown in FIG. 2A, the air contact portion 20 includes a moisture absorbing material flow path 22 arranged in the vertical direction, and the moisture absorbing material flow path 22 is connected to the air flow path 21. On the other hand, they are provided so as to intersect (for example, orthogonally). If the arrangement direction (vertical direction) of the moisture absorbing material flow path 22 is the vertical direction, the arrangement direction (horizontal direction) of the air flow path 21 can be said to be the horizontal direction. It will flow in from the lateral direction with respect to 22.

As shown by the dotted arrows in FIGS. 1 and 2 (A), the liquid moisture absorbing material having a low water content is supplied to the moisture absorbing material flow path 22 from the second pipe 16b of the moisture absorbing material pipe 16. Assuming that this is the low water content moisture absorbing material c2, as shown in FIG. 2A, the low water content moisture absorbing material c2 flows from the upper side to the lower side of the moisture absorbing material flow path 22 as shown by the arrow c0. .. On the other hand, since the low temperature and high humidity air A1 flows in from the horizontal direction intersecting (orthogonal) in the vertical direction (vertical direction), the low temperature and high humidity air A1 from the side with respect to the flow of the low water content moisture absorbing material c2. Flows will collide.

Here, as described above, the moisture-absorbing material flow path 22 is composed of the space-filling solid 23 itself, for example, a honeycomb structure, or is a space inside a tubular member that is the main body of the moisture-absorbing material flow path 22. Any "high surface area portion" such as a configuration in which the filling solid 23 is filled may be used. In such a "high surface area portion", air is circulated by blowing air from the horizontal direction (crossing and orthogonal directions), and the liquid moisture absorbing material is circulated in the vertical direction (vertical direction). Therefore, the low water content moisture absorbing material c2 flowing through the moisture absorbing material flow path 22 flows through the flow path having a high surface area, so that it can efficiently contact the low temperature and high humidity air A1.

In addition, the main component of the liquid moisture absorbing material is an ionic liquid, and in the present disclosure, the viscosity of this ionic liquid decreases depending on the water content. Since the low water content moisture absorbing material c2 has a low water content, it has a relatively high viscosity and flows relatively slowly through the high surface area moisture absorbing material flow path 22. As a result, the contact frequency between the liquid hygroscopic material and the low temperature and high humidity air A1 can be further improved, so that the moisture contained in the low temperature and high humidity air A1 can be efficiently absorbed by the liquid hygroscopic material. ..

As a result, when the low-temperature and high-humidity air A1 passes through the moisture-absorbing material flow path 22, it becomes low-temperature and low-humidity air, that is, low-temperature and low-humidity air A2, as shown by the double-line block arrow A2 without shading. It is discharged from the route 21. Further, when the low water content moisture absorbing material c2 flows out from the moisture absorbing material flow path 22, as shown by the solid arrow, it becomes a liquid moisture absorbing material having a high water content, that is, a high water content moisture absorbing material c1, and flows into the first pipe 16a. ..

After that, the highly water-containing moisture-absorbing material c1 flows through the first pipe 16a and reaches the moisture-releasing portion 12. In the moisture releasing section 12, for example, indoor air, which is a humidity control target, is introduced into the air contact section 20. Since the indoor air is relatively hot and low in humidity compared to the outside air, it flows into the air flow path 21 as high temperature and low humidity air B1 as shown by the thick line block arrow without shading in FIGS. 1 and 2 (B). do.

In the present embodiment, the air contact portion 20 provided in the moisture releasing portion 12 includes a moisture absorbing material flow path 22 arranged in the vertical direction as shown in FIG. 2B, similarly to the moisture absorbing portion 11. The moisture absorbing material flow path 22 is provided so as to intersect (for example, orthogonally) with the air flow path 21. Therefore, the high temperature and low humidity air B1 flows in from the lateral direction to the hygroscopic material flow path 22 arranged in the vertical direction.

As shown by the solid arrow in FIGS. 1 and 2B, the highly water-containing moisture-absorbing material c1 is supplied to the moisture-absorbing material flow path 22 from the first pipe 16a. Since the moisture absorbing material flow path 22 is arranged in the vertical direction, as shown in FIG. 2 (B), the highly water-containing moisture absorbing material c1 is indicated by an arrow c0 from the upper side to the lower side of the moisture absorbing material flow path 22. It will flow. At this time, since the moisture absorbing material heating unit 24 is provided on the upstream side of the moisture absorbing material flow path 22, the highly water-containing moisture absorbing material c1 before flowing into the moisture absorbing material flow path 22 is heated.

Since the high temperature and low humidity air B1 flows in from the lateral direction (crossing or orthogonal direction) with respect to the moisture absorbing material flow path 22, the flow of the high temperature and low humidity air B1 from the side collides with the flow of the high water content moisture absorbing material c1. .. The moisture-absorbing material flow path 22 is composed of a space-filling solid 23 which is a structure having a high surface area, and the main component of the liquid moisture-absorbing material is an ionic liquid having a high water content and a low viscosity. Therefore, the high water content moisture absorbing material c1 can smoothly flow through the moisture absorbing material flow path 22 and efficiently contact the high temperature and low humidity air B1.

Here, since the high water content moisture absorbing material c1 has a lower viscosity than the low water content moisture absorbing material c2, the time for flowing through the moisture absorbing material flow path 22 is shortened. Simply put, if the distribution time is short, the frequency of contact between the liquid hygroscopic material and air will decrease, and there is a possibility that efficient moisture release will not be possible. However, since the high-temperature and low-humidity air B1 introduced into the moisture-releasing portion 12 has a relatively high temperature, the saturated water vapor pressure is higher and the humidity is lower than that of the low-temperature air. Therefore, even if the contact time with air is relatively shorter than that of the moisture absorbing portion 11, it is possible to satisfactorily release moisture from the liquid moisture absorbing material to air.

Moreover, in the present embodiment, the highly water-containing moisture-absorbing material c1 flowing into the moisture-absorbing material flow path 22 is heated by the moisture-absorbing material heating unit 24. As a result, the moisture contained in the liquid hygroscopic material is easily evaporated, so that the high temperature and low humidity air B1 having a high saturated water vapor pressure and low humidity can be released even more satisfactorily. In other words, since the air in the moisture absorbing portion 11 has a low temperature, it is particularly desirable that the liquid moisture absorbing material has a high viscosity in order to aim for efficient moisture absorption, and in the moisture releasing portion 12, the air has a high temperature, so that the liquid is liquid. Efficient moisture release is possible even if the hygroscopic material has a low viscosity.

In this way, the high water content moisture absorption material c1 flows through the moisture absorption material flow path 22 and efficiently contacts the high temperature and low humidity air B1, so that moisture is efficiently dissipated from the high water content moisture absorption material c1 to the high temperature and low humidity air B1. Will be done. As a result, when the high temperature and low humidity air B1 passes through the moisture absorbing material flow path 22, it becomes high temperature and high humidity air, that is, high temperature and high humidity air B2, as shown by the shaded thick line block arrow B2, and becomes an air flow path 21. Is discharged from. Further, when the high water content moisture absorbing material c1 flows out from the moisture absorbing material flow path 22, it becomes a low water content moisture absorbing material c2 and flows into the second pipe 16b as shown by the dotted arrow. After that, as shown in FIG. 1, the low water content moisture absorbing material c2 is reintroduced into the moisture absorbing portion 11, so that the above-mentioned moisture absorption and desorption are repeated.

As shown in FIG. 1, the high-temperature and high-humidity air B2 is introduced into the humidifying portion 13 via the humidifying pipe 17. The humidifying unit 13 humidifies the indoor air by supplying the moisture contained in the high-temperature and high-humidity air B2. Here, as described above, if the humidifying unit 13 can measure the humidity, it is possible to humidify according to the humidity in the room. In this way, the indoor air can be satisfactorily humidified by controlling the humidification by the humidifying unit 13 instead of circulating the high-temperature and high-humidity air B2 discharged by the humidifying unit 12 as it is in the room.

As described above, in the moisture-releasing portion 12, the high-moisture-containing moisture-absorbing material c1 comes into contact with the high-temperature and low-humidity air B1 and releases moisture, so that it becomes the low-moisture-containing moisture-absorbing material c2 and flows out to the second pipe 16b. Since the moisture discharging portion 12 is connected to the storage portion 15 via a part of the second pipe 16b, the low water content moisture absorbing material c2 flows into the storage portion 15 as shown by the dotted arrow, and the storage portion 15 is concerned. Is stored in.

The liquid moisture absorbing material (low water content moisture absorbing material c2) stored in the storage unit 15 does not continue to be stored for a long time, and the moisture absorbing material piping 16 is provided by the circulation supply unit 14 while the humidity control system 10 is operating. It circulates inside and is supplied to the moisture absorbing portion 11 and the moisture releasing portion 12. Therefore, although the inflowing liquid hygroscopic material is temporarily stored in the storage unit 15, it is supplied to the hygroscopic unit 11 by the circulation supply unit 14 via the second pipe 16b at any time (see the dotted arrow). ..

Further, in the humidity control system 10 according to the present disclosure, the moisture absorbing portion 11 and the moisture releasing portion 12 are separately provided, and the liquid moisture absorbing material repeats moisture absorption and desorption while circulating through the moisture absorbing portion 11 and the moisture releasing portion 12. It is composed. As a result, energy consumption can be reduced as compared with a configuration using a conventional solid moisture absorbing material (zeolite or the like).

Specifically, in the configuration using the conventional solid hygroscopic material, it is necessary to raise and lower both the solid hygroscopic material itself and the substrate on which the solid hygroscopic material is supported. On the other hand, in the case of the configuration in which the liquid hygroscopic material is circulated as in the present disclosure, it is only necessary to raise and lower the temperature of the liquid hygroscopic material substantially. Further, by spatially partitioning the moisture absorbing portion 11 and the moisture releasing portion 12, the moisture absorbing portion 11 can always be kept at a relatively low temperature, and the moisture releasing portion 12 can always be kept at a relatively high temperature. can.

As described above, according to the present disclosure, at least an ionic liquid which is a liquid at a low temperature is used as the liquid moisture absorbing material, and the moisture absorbing portion 11 or the moisture releasing portion 12 is a liquid moisture absorbing material while flowing air through the air flow path 21. Is provided with an air contact portion 20 for supplying the air. As a result, the air can be satisfactorily dehumidified and humidified even in a low temperature environment, and by supplying the liquid hygroscopic material to the flowing air, the air and the liquid hygroscopic material are efficiently brought into contact with each other, which is efficient. Dehumidification or humidification of air can be realized.

In particular, the viscosity of the ionic liquid contained in the liquid hygroscopic material changes depending on the water content. Therefore, by supplying the liquid moisture absorbing material having a high viscosity in the moisture absorbing portion 11, it is possible to satisfactorily secure the contact time between the air to be absorbed and the liquid moisture absorbing material. Further, in the moisture releasing section 12, even if the water content is high and the viscosity is low, if the air is relatively high in temperature, the moisture contained in the liquid moisture absorbing material can be sufficiently released to the air.

[Variations, etc.]
In the present embodiment, as described above, as shown in FIG. 1, the air contact portion 20 is provided in both the moisture absorbing portion 11 and the moisture releasing portion 12, but the present disclosure is not limited to this, and the present disclosure is not limited to this. Either one of the portion 11 and the moisture releasing portion 12 may be configured to include the air contact portion 20. For example, as shown in FIG. 3, only the moisture absorbing portion 11 may be provided with the air contact portion 20, and the moisture releasing portion 12 may not be provided with the air contact portion 20.

In particular, in the moisture absorbing portion 11, since the liquid moisture absorbing material is brought into contact with the low temperature air, the moisture absorbing portion 11 includes the liquid moisture absorbing material having a high viscosity and a high surface surface portion (moisture absorbing material flow path 22). It is preferable to have an air contact portion 20. On the other hand, the moisture-releasing portion 12 does not necessarily have to include the air-contacting portion 20 because the air has a relatively high temperature and the liquid moisture-absorbing material can easily dissipate moisture by heating. The moisture-releasing portion 12 may have a structure capable of dissipating moisture from the highly water-containing moisture-absorbing material c1 and recovering the moisture for humidification.

Further, in the present embodiment, the high-temperature and high-humidity air B2 discharged from the air flow path 21 of the humidifying section 12 is introduced into the humidifying section 13 via the humidifying pipe 17, but the present disclosure is limited to this. However, for example, as shown in FIG. 4, a water condensing unit 18 may be provided between the humidifying unit 12 and the humidifying unit 13.

The specific configuration of the water condensing unit 18 is not particularly limited, and a known configuration can be preferably used as long as it condenses the water released from the moisture releasing unit 12. For example, the water condensing unit 18 condenses the water vapor contained in the high-temperature and high-humidity air B2 by cooling (or lowering) the high-temperature and high-humidity air B2 flowing from the air flow path 21 through the humidifying pipe 17. Temporarily stored as liquid water (condensed water). As shown by the solid line arrow d in FIG. 4, the condensed water stored in the water condensing section 18 is supplied to the humidifying section 13 via the humidifying pipe 17 as needed, and the humidifying section 13 is supplied. Humidify the indoor air using condensed water.

In this way, since the humidity control system 10 includes the water condensing unit 18, the water contained in the high-temperature and high-humidity air B2 undergoes a phase transition to a liquid instead of a gas (water vapor), so that the water content of the liquid is used in the humidifying unit 13. It becomes possible to humidify the air. Further, if the water condensing unit 18 is configured to be able to store the condensed water, if the humidifying unit 13 does not use all the water contained in the high temperature and high humidity air B2 for humidification, excess water is stored. Can be left. Moreover, if the water is stored in the water condensing unit 18, humidification by the humidifying unit 13 can be executed even if the water absorbing unit 11 and the moisture releasing unit 12 cannot sufficiently recover the water.

The water absorbed by the liquid moisture absorbing material by the moisture absorbing portion 11 may be stored in the water condensing portion 18 via the moisture releasing portion 12, but for example, by providing the storage portion 15 in the first pipe 16a, It can also be stored in a state of being contained in the highly water-containing hygroscopic material c1.

Further, in the present embodiment, as shown in FIGS. 1, 3 or 4, the moisture absorbing portion 11 and the moisture releasing portion 12 have independent configurations, but the present disclosure is not limited to this, for example. , As shown in FIG. 5, the configuration may include a moisture absorbing / releasing portion 19 in which the moisture absorbing / releasing portion 11 and the moisture releasing portion 12 are integrated.

The specific configuration of the moisture absorbing / releasing portion 19 is not particularly limited, and may be configured to include two air contacting portions 20 for the moisture absorbing / releasing portion 11 and two air contacting portions 20 for the moisture releasing portion 12 (FIG. 1). (See), and may be configured to include only the air contact portion 20 for the moisture absorbing portion 11 and to have a moisture releasing mechanism (humidifying means) different from that of the air contact portion 20 for the moisture releasing portion 12 (Fig.). 3). Alternatively, in the reverse configuration, the moisture absorbing / releasing portion 19 is provided with an air contact portion 20 for the moisture releasing portion 12, and for the moisture absorbing portion 11, a moisture absorbing mechanism (moisture absorbing means) different from that of the air contact portion 20 is provided. It may be provided.

Alternatively, the moisture absorbing / releasing unit 19 may be configured to use the same air contacting unit 20 for moisture absorption at a certain time zone and for moisture release at another time zone, or a mechanism for heating the liquid moisture absorbing material. It may be configured to repeat moisture absorption and desorption by moving (a moisture absorbing material heating unit 24, a heating medium adding unit or another heating means). Further, as shown in FIG. 4, the configuration may include a water condensing portion 18 interposed between the moisture absorbing / releasing portion 19 and the humidifying portion 13.

Further, in the present embodiment, as shown in FIGS. 2A and 2B, as the air contact portion 20, the moisture absorbing material flow path 22 is the space-filling solid 23 itself, or is inside the tubular member. Although the configuration in which the space-filling solid 23 is filled is exemplified, the present disclosure is not limited to this, and as described above, it functions as a “high surface area portion” that allows air to be in good contact with the flowing liquid hygroscopic material. It should be.

For example, in the air contact portion 20 included in the moisture absorbing portion 11, as shown in FIG. 6A, the moisture absorbing material flow path 22A may have a configuration in which a plurality of vertically elongated fins 121 are arranged in parallel, or the moisture releasing portion. In the air contact portion 20 provided in 12, as shown in FIG. 6B, the moisture absorbing material flow path 22B may have a configuration in which horizontally long fins 122 are arranged in parallel. As described above, even if the air contact portion 20 has a structure in which the plate-shaped bodies are arranged in parallel, the air contact portion 20 effectively functions as a “high surface area portion”.

The vertically long fin 121 may be a rectangular plate-shaped member extending in the flow direction of the liquid moisture absorbing material (arrow c0) in the moisture absorbing material flow path 22A, and the horizontally long fin 122 may be a liquid moisture absorbing material in the moisture absorbing material flow path 22B. A rectangular plate-shaped member extending in a direction intersecting (particularly orthogonal to) with respect to the flow direction of the material (arrow c0) may be used. The specific configuration of the vertically elongated fins 121 and the horizontally elongated fins 122 is not particularly limited, and may be composed of a known material that does not affect the moisture absorption and desorption of the liquid moisture absorbing material. Further, the sizes of the vertically long fins 121 and the horizontally long fins 122, the number of parallel fins, the parallel spacing, and the like are not particularly limited, and can be appropriately set according to various conditions.

Further, in both the moisture absorbing material flow path 22A and the moisture absorbing material flow path 22B, the end portion on the side where the liquid moisture absorbing material flows in is referred to as the inflow end portion 22p, and the end portion on the side where the liquid moisture absorbing material flows out is referred to as the outflow end portion. It is called 22q. In FIGS. 6A and 6B, in both the moisture absorbing material flow path 22A and the moisture absorbing material flow path 22B, the upper side in the figure is the inflow end portion 22p and the lower side in the figure is the outflow end portion 22q. Further, the space between the adjacent vertically elongated fins 121 or the adjacent horizontally elongated fins 122 is a flow path of the liquid moisture absorbing material, and is referred to as an in-path channel 22r. This is because in both the hygroscopic material flow path 22A and the hygroscopic material flow path 22B, it can be considered that one flow path is partitioned by a plurality of fins 121 or 122.

Here, as shown in FIGS. 6 (A) and 6 (B), the moisture-absorbing material flow path 22A included in the moisture-absorbing section 11 is more of the flow path than the moisture-absorbing material flow path 22B included in the moisture-releasing section 12. The opening is small and the total length of the flow path is long. In other words, the moisture-absorbing material flow path 22B included in the moisture-releasing section 12 is configured to have a larger opening of the flow path and a shorter overall length of the flow path than the moisture-absorbing material flow path 22A included in the moisture-absorbing section 11. Has been done.

Further, the width L1 of the vertically elongated fins 121 shown in FIG. 6 (A) is smaller than the width L2 of the horizontally elongated fins 122 shown in FIG. 6 (B) (L1 <L2), but the width of these fins 121 or 122 is the path. It can be said that it is the flow path width of the inner flow path 22r. Therefore, if the sum of the flow path widths is defined as the total length of the flow cross section of the moisture absorbing material flow paths 22A and 22B, the total length of the flow cross section of the moisture releasing portion 12 is larger than the total length of the flow cross section of the moisture absorbing portion 11. Is preferable.

For example, the moisture absorbing material flow path 22A (moisture absorbing portion 11) shown in FIG. 6A is composed of five vertically elongated fins 121, and the moisture absorbing material flow path 22B (moisture releasing portion 12) is also composed of five horizontally elongated fins 122. Has been done. If the width L1 of the vertically long fin 121 and the width L2 of the horizontally long fin 122 are the flow path widths of the hygroscopic material flow path 22A or 22B, respectively, the total length Lc1 of the flow section of the hygroscopic material flow path 22A is Lc1 = 5 × L1. The total length Lc2 of the flow section of the hygroscopic material flow path 22B is Lc2 = 5 × L2. Since L2 is larger than L1, the total flow cross section Lc2 of the moisture absorbing material flow path 22B is larger than the total flow cross section Lc1 of the moisture absorbing material flow path 22A (Lc2> Lc1).

By making the total length Lc2 of the flow cross section in the moisture releasing portion 12 larger than the total length Lc1 of the flow cross section in the moisture absorbing portion 11, the thickness of the liquid film of the liquid moisture absorbing material in the moisture releasing portion 12 becomes relatively small. As the thickness of the liquid film becomes smaller, the flow velocity of the liquid moisture-absorbing material in the moisture-absorbing material flow path 22B relatively decreases, and the contact time between the liquid moisture-absorbing material and air becomes longer. This makes it possible to improve the efficiency of moisture release from the liquid moisture absorbing material to the air in the moisture release unit 12. Moreover, for example, if the moisture-absorbing material heating unit 24 is configured to blow a hot air flow into the air flow path 21, not only the liquid film becomes thinner, so that the liquid moisture-absorbing material by the moisture-absorbing material heating unit 24 can be used. It is also possible to improve the efficiency of heating.

In addition, in the present embodiment, as shown in FIG. 6C, it is preferable that the moisture absorbing material flow path 22B of the moisture releasing portion 12 is provided with the moisture absorbing material developing portion 123 at the inflow end portion 22p. .. The moisture-absorbing material developing portion 123 may be one that expands or diffuses the liquid moisture-absorbing material in the expanding direction of the opening of the inflow end portion 22p and then introduces the liquid moisture-absorbing material into the opening. The specific configuration of the hygroscopic material developing portion 123 is not particularly limited, but may be, for example, a porous body (sponge or the like) as shown in FIG. 6 (C) or a mesh body (mesh or the like). good. By providing such a moisture-absorbing material developing portion 123, even if the total length Lc2 of the flow-absorbing material is relatively large and the opening area (flow cross-sectional area) of the moisture-absorbing material flow path 22B is relatively large, the moisture-absorbing material flows. The liquid hygroscopic material can be satisfactorily introduced into the entire path 22B.

In the above-mentioned example, the moisture absorbing material flow path 22 has a configuration in which plate-shaped bodies (vertical fins 121, horizontally long fins 122, etc.) are arranged in parallel. It may be a plate-like body having a physical shape such as a shape, a hole shape, and a crack shape. Further, even when the moisture absorbing material flow path 22 is composed of a honeycomb structure, a linear body, or a rod-shaped body, the total length of the flow cross section is similarly defined, and the total length of the flow cross section of the moisture releasing portion 12 is defined. It may be larger than the total length of the flow cross section of the moisture absorbing portion 11. Further, when the above-mentioned physical shape is introduced into the surface of the parallel arrangement member (linear body, rod-shaped body, plate-shaped body, etc.) constituting the hygroscopic material flow path 22, the physical shape is also included. The total length of the flow cross section may be defined. In this case, the total length of the cross section of the flow passage can be defined as, for example, the product of the surface area of the parallel arrangement member having a physical shape and the width of the flow path. As a result, it is possible to improve the moisture release efficiency as in the case of being composed of a plate-shaped body.

(Embodiment 2)
In the first embodiment, the humidity control system 10 according to the present disclosure has been described by focusing on the operation of the liquid moisture absorbing material and the moisture absorbing portion 11 and the moisture releasing portion 12 using the liquid moisture absorbing material. In the second embodiment, the humidity control system 10 according to the present disclosure will be described with reference to FIGS. 7 and 8 with a focus on the control configuration thereof.

The humidity control system 10 according to the second embodiment is the same as the humidity control system 10 according to the first embodiment, but includes a control unit 50 and a hygroscopic material temperature measuring device 51 as shown in FIG. There is. The humidity control system 10 according to the first embodiment may also have a control unit (not shown) to control the operation of the humidity control system 10. However, in the second embodiment, the control unit 50 further includes a control unit. It is configured to control the heating of the liquid hygroscopic material by the hygroscopic material heating unit 24 at least based on the measurement result of the hygroscopic material temperature measuring device 51, that is, the temperature of the liquid hygroscopic material.

In the configuration shown in FIG. 7, the control unit 50 controls the operations of the moisture absorbing unit 11, the moisture releasing unit 12, the humidifying unit 13, and the circulation supply unit 14. Further, since the moisture releasing unit 12 includes the hygroscopic material heating unit 24 (see FIG. 2B) as described above, the control unit 50 also controls the operation of the hygroscopic material heating unit 24. In FIG. 7, the control command from the control unit 50 is illustrated by an arrow. On the other hand, the control unit 50 controls the operation of the hygroscopic material heating unit 24 based on the measurement result (temperature of the liquid hygroscopic material) of the hygroscopic material temperature measuring device 51. Therefore, in FIG. 7, an arrow indicating the input of the measurement result from the block of the hygroscopic material temperature measuring device 51 to the block of the control unit 50 is shown.

The specific configuration of the control unit 50 is not particularly limited, and any known microcomputer, microcontroller, or the like may be used. Further, the specific configuration of the moisture absorbing material temperature measuring device 51 is not particularly limited, and a known thermometer capable of measuring the temperature of the liquid moisture absorbing material can be preferably used. Further, the position of temperature measurement by the hygroscopic material temperature measuring device 51 is not particularly limited. A typical example is the moisture-absorbing unit 12, and more specifically, it is preferable to measure the temperature of the liquid moisture-absorbing material in the vicinity of the moisture-absorbing material heating unit 24 included in the moisture-absorbing unit 12.

In this way, if the control unit 50 controls the operation of the hygroscopic material heating unit 24 (heating of the liquid hygroscopic material by the hygroscopic material heating unit 24) based on the temperature of the liquid hygroscopic material, the liquid hygroscopic material in the hygroscopic unit 12 The temperature can be maintained within a suitable range. Therefore, it is possible to make the moisture release from the liquid hygroscopic material more efficient, and it is possible to operate the hygroscopic material heating unit 24 efficiently, and it is possible to save energy in the humidity control system 10.

Further, in the humidity control system 10 according to the second embodiment, as shown in FIG. 8, the humidity release unit 12 includes an air temperature measuring device 52 and a humidity measuring device 53, and the control unit 50 has an air temperature. At least one of the measurement results of the measuring device 52 and the humidity measuring device 53 is used together with the measurement result of the moisture absorbing material temperature measuring device 51 to control the operation of the moisture absorbing material heating unit 24 (or the operation of the entire humidity control system 10). It may be configured.

The air temperature measuring device 52 is an air in which moisture is released from the liquid moisture absorbing material in the moisture releasing portion 12 (humidified air), that is, high temperature and high humidity air B2 (exemplified in FIG. 1 or FIG. 2 (B)). The temperature of the shaded thick line block arrow) is measured. Further, the humidity measuring device 53 also measures the humidity of the humidified air, that is, the high temperature and high humidity air B2 exemplified in FIG. 1 or FIG. 2 (B). The specific configuration of the air temperature measuring device 52 or the humidity measuring device 53 is not particularly limited, and a known measuring device capable of measuring the temperature or humidity of the high temperature and high humidity air B2 in the moisture discharging unit 12 can be preferably used.

The control unit 50 controls the operation of the hygroscopic material heating unit 24 based on not only the temperature of the liquid hygroscopic material but also the temperature and / or humidity of the high temperature and high humidity air B2 (humidified air) to release moisture. The temperature of the liquid hygroscopic material in the part 12 can be maintained within a more suitable range. Therefore, it is possible to further improve the efficiency of releasing moisture from the liquid moisture absorbing material, and it is possible to efficiently operate the moisture absorbing material heating unit 24.

Here, it is more preferable that the hygroscopic material heating unit 24 has PTC (Positive Temperature Coefficient) characteristics. The PTC characteristic is a characteristic that when the temperature rises, the electric resistance increases and it becomes difficult for the current to flow, and when the temperature decreases, the electric resistance decreases and the current easily flows.

If the hygroscopic material heating unit 24 has PTC characteristics, further temperature rise is avoided when a certain temperature is reached. Therefore, since the excessive temperature rise of the hygroscopic material heating unit 24 is suppressed even without control from the control unit 50, it is possible to avoid inadvertently heating the liquid hygroscopic material. Therefore, the control unit 50 only needs to control ON / OFF of the hygroscopic material heating unit 24, which not only saves energy but also simplifies the control configuration of the hygroscopic material heating unit 24. You can also.

(Embodiment 3)
In the second embodiment, an example of a basic control configuration of the humidity control system 10 according to the present disclosure has been specifically described, but in the third embodiment, the control in the humidity control system 10 according to the present disclosure has been specifically described. Among them, an example of control for adjusting the content (blending amount) of water as a flammable abatement agent will be described with reference to FIG.

As shown in FIG. 9, the humidity control system 10 according to the third embodiment is basically the same as the humidity control system 10 according to the second embodiment (see FIG. 7), and the moisture absorbing portion 11 The moisture releasing unit 12, the humidifying unit 13, the circulation supply unit 14, the control unit 50, the hygroscopic material temperature measuring device 51, etc. are provided, and the hygroscopic unit 12 includes the hygroscopic material heating unit 24, but further, the hygroscopicity measuring unit. It is equipped with 45. The hygroscopicity measuring unit 45 is not particularly limited as long as it measures or evaluates the hygroscopicity of the liquid hygroscopic material, and various known measuring devices for hygroscopicity or water absorption can be used.

The control unit 50 controls the operation of the hygroscopic material heating unit 24 based on the measurement result of the hygroscopic material temperature measuring device 51, that is, the temperature of the liquid hygroscopic material. The operation of the moisture absorbing portion 11 and / or the moisture releasing portion 12 is controlled based on the moisture absorption rate. By controlling the operation of the moisture absorbing portion 11 and / or the moisture releasing portion 12, the amount of water absorbed (moisture absorbing amount) contained in the liquid moisture absorbing material can be adjusted, in other words, the moisture absorbing portion 11 and / or By controlling the operation of the moisture releasing portion 12, the content of water (or an aqueous solution) which is a flammable abatement agent can be adjusted.

As described above, the preferable range of the content (blending amount) of the flammable abatement agent in the liquid hygroscopic material is at least an amount exceeding 10% by weight of the total amount (100% by weight) of the ionic liquid and the flammable abatement agent. Can be done. Therefore, when the measurement result of the hygroscopicity measuring unit 45 shows that the content of water, which is a flammable abatement agent, is 10% by weight or less, the control unit 50 uses the liquid hygroscopic material. The moisture absorbing portion 11 may be controlled to operate so that the water content in the water exceeds 10% by weight. Alternatively, 80% by weight or less can be mentioned as a preferable upper limit of the content of the flammable abatement agent. Therefore, when the measurement result of the hygroscopicity measuring unit 45 shows that the content of water, which is a flammable abatement agent, exceeds 80% by weight, the control unit 50 determines the water in the liquid hygroscopic material. The moisture discharging unit 12 may be operated (or the hygroscopic material heating unit 24 may be operated) so that the content is 80% by weight or less.

Although not shown in FIG. 9, as described in the first embodiment, the humidity control system 10 according to the present disclosure includes a water condensing unit 18 that condenses the moisture released from the moisture releasing unit 12. You may. Therefore, based on the measurement result of the moisture absorption rate measuring unit 45, the control unit 50 condenses the water released by the moisture releasing unit 12 by the water condensing unit 18, or the water condensed by the water condensing unit 18 as a liquid moisture absorbing material. It may be controlled to supply to.

For example, when the measurement result of the moisture absorption rate measuring unit 45 shows that the content of water, which is a flammable reducing agent, is 10% by weight or less, the control unit 50 has a water content of 10% by weight or less. The water condensed by the water condensing unit 18 may be controlled to be supplied to the liquid moisture absorbing material so as to exceed 10% by weight. At this time, the water condensing unit 18 not only accumulates the previously condensed water, but also supplies the accumulated water to the moisture absorbing material pipe 16, the storage unit 15, the circulation supply unit 14, etc. (condensed in the liquid moisture absorbing material). It suffices if it is configured (to mix the water content).

Further, when the measurement result of the hygroscopicity measuring unit 45 shows that the content of water, which is a flammable reducing agent, exceeds 80% by weight, the control unit 50 has a water content of 80% by weight. The moisture releasing section 12 may be operated (or the hygroscopic material heating section 24 may be operated) as follows, and the moisture released by the moisture releasing section 12 may be controlled to be condensed by the water condensing section 18. Therefore, in the control configuration shown in FIG. 9, if the water condensing unit 18 is included, the water condensing unit 18 operates under the control of the control unit 50. It suffices if an arrow is drawn to indicate a control command.

(Embodiment 4)
In the first or second embodiment, a typical configuration example of the humidity control system 10 using a liquid moisture absorbing material containing an ionic liquid as a main component has been described, but in the fourth embodiment, the first embodiment has been described. A typical configuration example of the air conditioner provided with the described humidity control system 10 will be described with reference to FIG.

As shown in FIG. 10, the air conditioner 30 according to the present disclosure includes an indoor unit 31 and an outdoor unit 32, and a refrigerating cycle 33 and a humidity control system 10 are provided so as to straddle the indoor unit 31 and the outdoor unit 32. It is provided.

The configuration of the humidity control system 10 is as described in the first or second embodiment, and detailed description thereof will be omitted. However, in FIG. 10, for convenience of explanation, the control shown in FIGS. 1, 3 to 5, etc. The configuration of the wet system 10 is simplified and illustrated.

In the air conditioner 30 shown in FIG. 10, in the humidity control system 10, the moisture absorbing portion 11 and the moisture releasing portion 12, and the moisture absorbing material pipe 16 connected so as to circulate the liquid moisture absorbing material between them are located on the outdoor unit 32 side. It is provided. In FIG. 10, is simplified and described in a straight line. On the other hand, the indoor unit 31 is provided with a humidifying unit 13. The humidifying pipe 17 connecting the humidifying unit 13 and the humidifying unit 12 is provided between the indoor unit 31 and the outdoor unit 32. In FIG. 10, the circulation supply section 14, the storage section 15, and the air contact section 20 included in at least one of the moisture absorption section 11 and the moisture release section 12 are omitted.

The refrigeration cycle 33 includes an indoor unit side heat exchanger 34 provided in the indoor unit 31, an outdoor unit side heat exchanger 35 provided in the outdoor unit 32, a compressor 36, and a decompression device 37. These are connected in an annular shape by a refrigerant pipe 38 in the order of the indoor unit side heat exchanger 34, the compressor 36, the outdoor unit side heat exchanger 35, and the decompression device 37.

Although not shown, the refrigerant pipe 38 connecting the indoor unit side heat exchanger 34, the compressor 36, and the outdoor unit side heat exchanger 35 is provided with a cooling / heating switching valve. Further, the indoor unit 31 is provided with a blower fan, a temperature sensor, an operation unit and the like (not shown), and the outdoor unit 32 is provided with a blower, an accumulator and the like (not shown). Further, the refrigerant pipe 38 is provided with various valve devices, strainers and the like (not shown) other than the air-conditioning switching valve.

The indoor unit side heat exchanger 34 exchanges heat between the indoor air sucked into the indoor unit 31 by the blower fan and the refrigerant flowing inside the indoor unit side heat exchanger 34. The indoor unit 31 blows air warmed by heat exchange into the room during heating, and blows air cooled by heat exchange into the room during cooling. The outdoor unit side heat exchanger 35 exchanges heat between the outside air sucked into the outdoor unit 32 by the blower and the refrigerant flowing inside the outdoor unit side heat exchanger 35.

The specific configuration of the indoor unit 31 and the outdoor unit 32, or the indoor unit side heat exchanger 34 or the outdoor unit side heat exchanger 35, the compressor 36, the depressurizing device 37, the blower fan, the temperature sensor, the operation unit, The specific configuration of the blower, accumulator, valve device, strainer and the like is not particularly limited, and known configurations can be preferably used.

An example of the operation of the refrigeration cycle 33 in the air conditioner 30 will be specifically described. First, in the cooling operation or the dehumidifying operation, the compressor 36 of the outdoor unit 32 compresses and discharges the gas refrigerant, whereby the gas refrigerant is sent to the outdoor unit side heat exchanger 35. Since the outdoor unit side heat exchanger 35 exchanges heat between the outside air and the gas refrigerant, the gas refrigerant condenses and liquefies. The liquefied liquid refrigerant is decompressed by the decompression device 37 and sent to the indoor unit side heat exchanger 34. In the indoor unit side heat exchanger 34, the liquid refrigerant evaporates to become a gas refrigerant by heat exchange with the indoor air. This gas refrigerant returns to the compressor 36 of the outdoor unit 32. The compressor 36 compresses the gas refrigerant and discharges it to the outdoor unit side heat exchanger 35 again.

Further, in the heating operation, the compressor 36 of the outdoor unit 32 compresses and discharges the gas refrigerant, whereby the gas refrigerant is sent to the heat exchanger 34 on the indoor unit side. In the indoor unit side heat exchanger 34, the gas refrigerant is condensed and liquefied by heat exchange with the indoor air. The liquefied liquid refrigerant is decompressed by the decompression device 37 to become a gas-liquid two-phase refrigerant, and is sent to the outdoor unit side heat exchanger 35. Since the outdoor unit side heat exchanger 35 exchanges heat between the outside air and the gas-liquid two-phase refrigerant, the gas-liquid two-phase refrigerant evaporates to become a gas refrigerant and returns to the compressor 36. The compressor 36 compresses the gas refrigerant and discharges it to the indoor unit side heat exchanger 34 again.

The operation of the humidity control system 10 in the air conditioner 30 is as described in the first embodiment, but the operation of the humidity control system 10 can be simplified by taking as an example a heating operation in which the humidity in the room tends to decrease. explain.

For example, in a heating operation, when the humidity in the room decreases, the moisture absorbing unit 11 introduces outside air and absorbs the moisture in the outside air by the liquid hygroscopic material. As described above, the moisture-absorbed liquid moisture-absorbing material is supplied to the moisture-releasing portion 12 via the moisture-absorbing material pipe 16 as a highly water-containing moisture-absorbing material c1 (see FIGS. 1, 3 to 5). The moisture-releasing unit 12 releases the moisture contained in the highly water-containing moisture-absorbing material c1. The dehumidified water is supplied to the humidifying section 13 via the humidifying pipe 17 in the state of steam or the state of condensed water condensed by the water condensing section 18. The humidifying unit 13 uses the supplied water for humidifying the room. As described above, the liquid moisture-absorbing material from which the water is released is supplied to the moisture-absorbing portion 11 as the low-moisture-containing moisture-absorbing material c2. The recovery of water from the outside air by the moisture absorbing unit 11 and the moisture releasing unit 12 may be continued until the required amount of water is obtained in the humidifying unit 13.

As described above, the air conditioner 30 according to the fourth embodiment is configured to include the humidity control system 10 described in the first or second embodiment. The configuration of the air conditioner 30 is not particularly limited, but the indoor unit 31 and the outdoor unit 32 are provided, but at least the moisture absorbing portion 11 and the moisture releasing portion 12 of the humidity control system 10 are provided in the outdoor unit 32. Can be mentioned. In the humidity control system 10, the moisture absorbing portion 11 absorbs moisture in the air by the liquid moisture absorbing material, and the moisture releasing portion 12 recovers the moisture from the liquid moisture absorbing material. As a result, the humidifying unit 13 can humidify the indoor air.

Here, the humidity control system 10 is not limited to the configuration applied to the air conditioner 30 as in the present embodiment, and may be configured as a humidity control device as it is, or a device other than the air conditioner 30. Needless to say, it may be applied to equipment. Needless to say, the specific configuration of the air conditioner 30 is not limited to the configuration described in the fourth embodiment.

The present invention will be described in more detail with reference to Examples and Reference Examples, but the present invention is not limited thereto. One of ordinary skill in the art can make various changes, modifications, and modifications without departing from the scope of the present invention.

(Reference example)
As the liquid hygroscopic material of the reference example, it is composed only of 1-ethyl-3-methylimidazolium acetate (referred to as "(emin) (AcO)" for convenience), which is an ionic liquid, and is a flammable abatement agent. A water-free product (moisture absorption rate 0% by weight) was prepared. The flash point of the liquid hygroscopic material of this reference example was measured based on the flash point measurement test specified by the Cabinet Order on the Regulation of Dangerous Goods (Cabinet Order of Japan).

As a result, the flash point of the liquid hygroscopic material of the reference example was 164 ° C. Therefore, the liquid hygroscopic material of this reference example is classified as a flammable liquid of Class 4 Type 3 Petroleum in Appendix 1 of the Fire Service Act of Japan.

(Example 1)
As the liquid hygroscopic material of Example 1, a mixture of 90% by weight of (emin) (AcO), which is an ionic liquid, and 10% by weight of water, which is a flammable abatement agent, was prepared (moisture absorption rate: 10% by weight). The flash point of the liquid hygroscopic material of Example 1 was measured in the same manner as in the reference example.

As a result, the flash point of the liquid hygroscopic material of Example 1 was 197 ° C. Therefore, although the liquid moisture-absorbing material of Example 1 is classified as a flammable liquid of Class 4 and III petroleum in Appendix 1 of the Fire Service Act of Japan, like the liquid moisture-absorbing material of Reference Example, its The flash point was higher than that of the liquid moisture absorbing material of the reference example, and the flammability was reduced.

(Example 2)
As the liquid hygroscopic material of Example 2, a mixture of 80% by weight of (emin) (AcO), which is an ionic liquid, and 20% by weight of water, which is a flammable abatement agent, was prepared (moisture absorption rate: 20% by weight). The flash point of the liquid hygroscopic material of Example 2 was measured in the same manner as in the reference example.

As a result, the liquid hygroscopic material of Example 2 boiled at 170 ° C., and the flash point could not be measured. Therefore, the liquid hygroscopic material of Example 2 was not classified as a flammable liquid in Attached Table 1 of the Fire Service Act of Japan.

(Example 3)
As the liquid hygroscopic material of Example 3, a mixture of 70% by weight of (emin) (AcO), which is an ionic liquid, and 30% by weight of water, which is a flammable abatement agent, was prepared (moisture absorption rate: 30% by weight). The flash point of the liquid hygroscopic material of Example 2 was measured in the same manner as in the reference example.

As a result, the liquid hygroscopic material of Example 3 boiled at 140 ° C., and the flash point could not be measured. Therefore, the liquid hygroscopic material of Example 3 was not classified as a flammable liquid in Attached Table 1 of the Fire Service Act of Japan.

(Comparison of Examples and Reference Examples)
As described above, the liquid moisture-absorbing material of Reference Example, that is, 100% (emin) (AcO), was a flammable liquid having a flash point of 164 ° C., but as a flammable killing agent like the liquid moisture-absorbing material of Example 1. It was clarified that the flash point can be raised and the flammability can be reduced by adding water. Further, it was clarified that in the liquid hygroscopic material of Example and the liquid hygroscopic material of Example 2, the flash point can be eliminated and the flammability can be eliminated by blending a larger amount of water as a flammable abatement agent.

Further, as shown in FIG. 11, the results of Reference Examples and Examples 1 to 3 are shown in a graph in which the vertical axis is flammable or boiling point (unit: ° C.) and the horizontal axis is moisture absorption rate (unit: weight%). As a result of plotting, as shown by the dotted line graph in the figure, the flash point of the liquid moisture absorbing material rises until the content of the flammable abatement agent reaches about 10% by weight, and as shown in the solid line graph in the figure, about 10 It was clarified that when the weight exceeds% by weight, the flash point disappears and the boiling point also decreases.

From this result, it is possible to reduce the flammability by blending a flammable reducing agent with the ionic liquid which is the main component as a liquid hygroscopic material, and when the blending amount of the flammable killing agent exceeds 10% by weight, it catches fire. It can be seen that the dots themselves disappear and the flammability can be eliminated.

It should be noted that the present invention is not limited to the description of the above-described embodiment, and various modifications can be made within the scope of the claims, and the present invention is disclosed in different embodiments and a plurality of modifications. Embodiments obtained by appropriately combining the above technical means are also included in the technical scope of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be widely and suitably used not only in a humidity control system or a humidity control device using a liquid moisture absorbing material, but also in the field of an air conditioner using such a humidity control system.

10: Humidity control system 11: Moisture absorbing part 12: Moisture releasing part 13: Humidizing part 14: Circulation supply part 15: Storage part 16: Moisture absorbing material pipe 16a: First pipe 16b: Second pipe 17: Humidizing pipe 18: Water Condensing part 19: Moisture absorbing / releasing part 20: Air contact part 21: Air flow path 22, 22A, 22B: Moisture absorbing material flow path 22p: Inflow end part 22q: Outflow end part 22r: In-path flow path 23: Space filling solid 24 : Moisture absorbing material heating unit 30: Air conditioner 31: Indoor unit 32: Outdoor unit 33: Refrigeration cycle 34: Indoor unit side heat exchanger 35: Outdoor unit side heat exchanger 36: Compressor 37: Decompression device 38: Refrigerator piping 45: Moisture absorption rate measuring unit 50: Control unit 51: Moisture absorbing material temperature measuring device 52: Air temperature measuring device 53: Humidity measuring device

Claims (14)

A moisture absorbing portion that absorbs moisture contained in the air with a liquid moisture absorbing material, a moisture releasing portion that releases the moisture absorbed by the liquid moisture absorbing material into the air, a storage portion that stores the liquid moisture absorbing material, and the moisture absorbing portion. A circulation supply section for circulating the liquid moisture absorbing material between the section and the moisture release section is provided, and the moisture absorption section, the moisture release section, the circulation supply section, and the storage section are connected by a moisture absorption material pipe. And
Further, in addition to the moisture-releasing portion, a humidifying portion that dissipates the moisture released in the moisture -releasing portion to the air to humidify the moisture is provided.
The moisture absorbing portion and the moisture releasing portion are moisture collecting portions that recover moisture from the outside air.
The moisture releasing portion includes an air contact portion having an air flow path for bringing the liquid moisture absorbing material into contact with air.
The liquid hygroscopic material is
Ionic liquids that are liquids at least in the range of 0 ° C to 5 ° C,
A flammable abatement agent that raises the flash point of a companion product obtained by compatibilizing with the ionic liquid above the flash point of the ionic liquid, or eliminates the flash point of the companion liquid.
Characterized by containing
Humidity control system using liquid moisture absorbing material. Control unit and
A hygroscopicity measuring unit for measuring or evaluating the hygroscopicity of the liquid hygroscopic material is provided.
The control unit is characterized in that the content of the flammable abatement agent contained in the liquid hygroscopic material is adjusted based on the measurement result of the hygroscopicity measuring unit.
The humidity control system according to claim 1. The flammable abatement agent is water or an aqueous solution.
The control unit is characterized in that the content of the water in the liquid hygroscopic material is adjusted so that the content of the water exceeds 10% by weight of the total amount of the ionic liquid and the water.
The humidity control system according to claim 2. The ionic liquid is characterized in that its water content exceeds 10% by weight after 1 hour has passed in a state where the ambient relative humidity is in the range of 30 to 95%.
The humidity control system according to any one of claims 1 to 3. Further, a water condensing section for condensing the moisture released from the moisture releasing section is provided.
The humidifying portion is characterized in that it is humidified using the water condensed by the water condensing portion.
The humidity control system according to any one of claims 1 to 4 . The moisture-releasing portion is characterized in that moisture is released from the liquid-absorbing material by heating the liquid-absorbing material that has absorbed moisture.
The humidity control system according to claim 5 . The moisture absorbing portion and the moisture releasing portion are integrated.
The humidity control system according to any one of claims 1 to 6 . A hygroscopic material temperature measuring device that measures the temperature of the liquid hygroscopic material,
A hygroscopic material heating unit that heats the liquid hygroscopic material,
With a control unit,
The control unit is characterized in that it controls at least one of heating of the liquid hygroscopic material or heating of the hygroscopic material heating medium by the hygroscopic material heating unit based on the temperature of the liquid hygroscopic material.
The humidity control system according to any one of claims 1 to 7 . The hygroscopic material heating unit has PTC (Positive Temperature Coefficient) characteristics and has a PTC (Positive Temperature Coefficient) characteristic.
The hygroscopic material heating section is provided in the moisture release section.
The humidity control system according to claim 8 . The moisture-releasing portion is a humidity measuring device for measuring the temperature of the humidified air from which moisture is released from the liquid moisture-absorbing material, and a humidity measuring device for measuring the humidity of the humidified air. With at least one
The control unit is characterized in that the heating of the liquid moisture-absorbing material by the moisture-absorbing material heating unit is controlled based on at least one of the measured temperature and humidity of the humidified air.
The humidity control system according to claim 8 or 9 . The moisture absorbing portion and the moisture releasing portion include a moisture absorbing material flow path for flowing the liquid moisture absorbing material.
The inside of the hygroscopic material flow path is divided into a plurality of in-passage channels.
The total length of the flow cross section of the moisture discharging portion is larger than the total length of the flow cross section of the moisture absorbing portion when the sum of the flow path widths of all the flow paths in the path is taken as the total length of the flow cross section. ,
The humidity control system according to any one of claims 1 to 10 . In the moisture-absorbing material flow path provided in the moisture-releasing portion, the liquid-absorbent material is spread (diffused) in the opening direction of the end at the end on the side where the liquid-absorbing material flows in, and the liquid-absorbing material is spread (diffused) in the opening. It is characterized by being provided with a moisture absorbing material developing portion to be introduced.
The humidity control system according to claim 11 . The humidity control system according to any one of claims 1 to 12 is provided.
Air conditioner. Equipped with indoor and outdoor units
At least the moisture absorbing portion and the moisture releasing portion of the humidity control system are provided inside the outdoor unit.
In the humidity control system, the moisture absorbing portion absorbs moisture in the air by the liquid moisture absorbing material, the moisture releasing portion recovers the moisture from the liquid moisture absorbing material, and the humidifying portion humidifies the indoor air. Characteristic,
The air conditioner according to claim 13 .

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