Air conditioning system, wet humidity control unit, and air conditioning method

Abstract

This air conditioning system comprises: a heat storage tank which accommodates an adsorbent that generates heat by adsorbing an adsorbate, and which discharges introduced moist air as dry air having a higher temperature and a lower humidity than the moist air; a heat exchanger which generates air for humidity regulation from the dry air by means of heat exchange with a refrigerant supplied from a cold energy source; and a wet type humidity regulating unit which regulates the temperature and humidity of the air for humidity regulation, by means of gas-liquid contact with a liquid humidity regulating agent, to generate feed air to be supplied to an air conditioning space.

Description

Technical Field

[0001] The present invention relates to an air conditioning system, a wet humidifying and dehumidifying unit, and an air conditioning method.

Background Art

[0002] Conventionally, an air conditioning system equipped with a humidifying and dehumidifying device that uses a liquid humidifying agent (such as an aqueous lithium chloride solution) to dehumidify and humidify outside air has been proposed. This humidifying and dehumidifying device includes, for example, a treatment machine and a regeneration machine into which a liquid humidifying agent is supplied. In the treatment machine, by bringing outside air into contact with the liquid humidifying agent, water vapor in the outside air is absorbed by the liquid humidifying agent, and the air is cooled and dehumidified. On the other hand, in the regeneration machine, by bringing the liquid humidifying agent into contact with outside air in a state where the water vapor pressure of the liquid humidifying agent is higher than the water vapor partial pressure of the outside air, the water vapor in the liquid humidifying agent is released to the outside air, thereby concentrating the liquid humidifying agent.

[0003] Patent Document 1 discloses a humidifying and dehumidifying device as an example, which includes a treatment machine that takes in air to be treated and brings it into contact with a hygroscopic liquid to dehumidify the air to be treated, a regeneration machine that regenerates the hygroscopic liquid used for the dehumidification treatment in the treatment machine, and a heat pump for supplying a heat medium to at least one of the treatment machine and the regeneration machine. According to the humidifying and dehumidifying device described in Patent Document 1, inside the treatment machine and the regeneration machine, by alternately flowing the hygroscopic liquid through the gas-liquid contact means and the solution heating and cooling means, it is intended to improve the energy utilization efficiency.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, in air conditioning systems equipped with this type of humidity control device, when supplying, for example, an aqueous lithium chloride solution as a liquid humidity control agent to the aforementioned processing and regeneration machines, it is necessary to use corrosion-resistant piping (for example, titanium) for the heat exchanger and gas-liquid contact means. This limits the types of piping that can be used in the construction of the air conditioning system, resulting in increased costs. On the other hand, when using an ionic liquid aqueous solution with low corrosion resistance as a liquid humidity control agent instead of an aqueous lithium chloride solution, this ionic liquid aqueous solution is more expensive than an aqueous lithium chloride solution. Furthermore, given the complex structure of the aforementioned processing and regeneration equipment, there was room for improvement in terms of the ease of installation of the air conditioning system.

[0006] Furthermore, Patent Document 1 mentioned above does not disclose or suggest any improvements in these areas; in other words, the development of an inexpensive and easy-to-install air conditioning system was eagerly awaited.

[0007] This disclosure is made in view of the above circumstances and aims to provide an air conditioning system that is easy to install and inexpensive, equipped with a humidity control device that controls the humidity of the air to be treated using a liquid humidity control agent. [Means for solving the problem]

[0008] To address the aforementioned problems, the air conditioning system according to the technology disclosed herein comprises: a heat storage tank that houses an adsorbent that generates heat by adsorbing an adsorbent, and discharges introduced humid air as dry air that is hotter and less humid than the humid air; a heat exchanger that generates humidified air from the dry air by heat exchange with a refrigerant supplied from a cooling source; and a wet humidity control unit that adjusts the temperature and humidity of the humidified air by gas-liquid contact with a liquid humidity control agent to generate supply air to be supplied to the air-conditioned space.

[0009] According to the above configuration, a heat storage tank that generates dry air from humid air using a chemical reaction is combined with a wet humidity control unit that generates supply air from humidified air through gas-liquid contact with a liquid humidity control agent. As a result, compared to conventional steam humidification or electric humidification systems, for example, there is no need to use energy such as electricity to generate dry air or supply air. Therefore, the energy consumption and carbon dioxide emissions when generating supply air to the air-conditioned space can be significantly reduced.

[0010] Furthermore, with the above configuration, the temperature and humidity of the supply air to the air-conditioned space are controlled by gas-liquid contact with a liquid dehumidifier. More specifically, the temperature and humidity of the supply air to the air-conditioned space can be controlled solely by adjusting the temperature and concentration of the liquid dehumidifier that comes into gas-liquid contact with the humidified air. Therefore, energy consumption in controlling the temperature and humidity of the supply air can be controlled more effectively, and the configuration can be made simpler.

[0011] The wet humidity control unit may consist of a gas-liquid contactor for bringing the liquid humidity control agent and the humidity control air into gas-liquid contact, a solution dispenser for supplying the liquid humidity control agent to the upper part of the gas-liquid contactor, a solution tank for collecting the liquid humidity control agent at the lower part of the gas-liquid contactor, and a solution dispensing pump for dispensing the liquid humidity control agent from the solution tank to the solution dispenser. With the above configuration, there is no need to install a heat exchanger to adjust the temperature of the liquid humidity control agent inside the wet humidity control unit, as in conventional systems, nor is there a need to install an external heat pump or the like. Therefore, since the configuration of a heat pump using a fluorocarbon refrigerant is omitted, the environmental burden when generating the supply air supplied to the air-conditioned space can be further reduced.

[0012] Furthermore, conventionally, when using a lithium chloride aqueous solution, which has corrosion resistance, as a liquid humidity control agent, it was necessary to use expensive corrosion-resistant materials (such as titanium) for the pipes through which this liquid humidity control agent flowed. On the other hand, even when using an ionic liquid aqueous solution with low corrosion resistance as a liquid humidity control agent instead of a lithium chloride aqueous solution, there was the problem that the ionic liquid aqueous solution was more expensive than a lithium chloride aqueous solution. In this respect, the above configuration eliminates the need for heat exchangers or heat pumps to regulate the temperature of the liquid dehumidifier, thus shortening the length of the pipes through which the liquid dehumidifier flows. As a result, even when using an aqueous lithium chloride solution as the liquid dehumidifier, the amount of expensive corrosion-resistant materials used can be reduced, thereby lowering the cost of constructing the air conditioning system.

[0013] The wet humidity control unit may further include a water supply means for diluting the liquid humidity control agent. With the above configuration, it is not necessary to integrate the processing unit and regeneration unit into a single unit, as in the conventional method. In other words, the regeneration unit can be omitted from the wet humidity control unit configuration. This makes it possible to significantly reduce the size of the wet humidity control unit compared to conventional methods.

[0014] The wet humidity control unit may further include measuring means, which include at least one of a concentration meter for measuring the concentration of the liquid humidity control agent, or a humidity meter for measuring the humidity of the supply air drawn out from the wet humidity control unit. In this case, the amount of water supplied from the water supply means to the liquid humidity control agent may be controlled based on the results of the measurement by the measuring means. According to the above configuration, the concentration of the liquid humidity control agent used to control the temperature and humidity of the supply air can be appropriately controlled.

[0015] Furthermore, the heat storage tank may be connected to a heat source that supplies a heat medium for desorbing adsorbate from the adsorbent used to generate the dry air. In this case, the heat medium connected to the heat storage tank may be heat supplied from a renewable energy source or waste heat supplied from a cogeneration system. In this case, the energy consumption required to generate the supply air can be further reduced.

[0016] An air conditioning system having the above configuration may further include a damper that controls the introduction of the dry air from the heat storage tank to the heat exchanger by opening and closing, and a control means that controls the operation of the damper. In this case, the control means may perform a control to open the damper after the adsorbent starts generating heat and the temperature of the adsorbent reaches an equilibrium state. With the above configuration, the temperature and humidity of the dry air supplied to the heat exchanger can be controlled to a constant level. This makes it easier to control the conditions (temperature, etc.) of the refrigerant from the cooling source used to generate the humidified air.

[0017] Furthermore, an air conditioning system having the above configuration may also include a return air path for introducing exhaust air from the space to be air-conditioned into the heat storage tank as humid air. Furthermore, the system may further include another heat exchanger that generates other dry air by heat exchange between the dry air discharged from the heat storage tank and the introduced outside air. In this case, the other heat exchanger may supply the other dry air to the heat exchanger instead of the dry air discharged from the heat storage tank.

[0018] The aforementioned liquid humidity control agent may be selected from at least one of a lithium chloride aqueous solution or an ionic liquid aqueous solution.

[0019] A technology relating to another aspect of this disclosure is a wet humidity control unit for adjusting the humidity of introduced air to be treated, comprising: a gas-liquid contactor for bringing a liquid humidity control agent and the air to be treated into gas-liquid contact; a solution sprayer for supplying the liquid humidity control agent to the upper part of the gas-liquid contactor; a solution tank for recovering the liquid humidity control agent at the lower part of the gas-liquid contactor; and a solution spray pump for dispensing the liquid humidity control agent from the solution tank to the solution sprayer. In addition, in the wet humidity control unit, the liquid humidity control agent may be circulated between the solution sprayer, the gas-liquid contactor and the solution tank without temperature control by an external heat source. According to the above configuration, compared to the conventional air conditioning system (processing machine) disclosed in Patent Document 1, the humidity of the air to be treated can be adjusted without controlling the temperature of the liquid humidity control agent.

[0020] Furthermore, a water supply means for diluting the liquid humidity conditioner may be further provided. In this case, in the wet humidity conditioning unit, the configuration of the regenerator for concentrating (regenerating) the liquid humidity conditioner can be omitted.

[0021] Also, the air to be treated may be air for air conditioning supplied to the air-conditioned space. That is, the wet humidity conditioning unit may be configured as a unit that can be incorporated into an air handling unit.

[0022] Furthermore, the air handling unit may include a heat storage tank that houses an adsorbent that generates heat by adsorbing an adsorbate and discharges the introduced moist air as dry air that is higher in temperature and lower in humidity than the moist air, and a heat exchanger that generates the air for air conditioning from the dry air by heat exchange with a refrigerant supplied from a cold and heat source.

[0023] Furthermore, a technique according to another aspect is an air conditioning method for an air-conditioned space using an air conditioning system, the method including: a step of making moist air introduced into the air conditioning system into dry air that is higher in temperature and lower in humidity than the moist air by an adsorbent that generates heat by adsorbing an adsorbate; a step of generating air for humidity conditioning from the dry air by heat exchange with a refrigerant; and a step of adjusting the temperature and humidity of the air for humidity conditioning by gas-liquid contact with a liquid humidity conditioner to generate supply air to be supplied to the air-conditioned space.

Advantages of the Invention

[0024] According to the technology of the present disclosure, an air conditioning system excellent in workability and inexpensive, which includes a humidity conditioning device that performs humidity conditioning of air to be treated using a liquid humidity conditioner, can be provided.

Brief Description of the Drawings

[0025] [Figure 1] It is an explanatory drawing schematically showing an outline of a system of an air conditioning system according to an embodiment. [Figure 2] It is an explanatory drawing showing another configuration example of the air conditioning system. [Figure 3]This is an explanatory diagram showing an example of the configuration of a wet-type humidity control unit according to an embodiment. [Figure 4] This graph shows the relationship between the concentration of a liquid humidity control agent and the relative humidity of the air. [Figure 5] This graph shows the relationship between relative humidity and temperature for different concentrations of liquid humidity control agents. [Figure 6] This is an explanatory diagram showing the operation of the air conditioning system during the summer. [Figure 7] This is a psychrometric chart showing the summer operation of an air conditioning system. [Figure 8] This graph shows the change in the temperature of the adsorbent over time. [Figure 9] This is an explanatory diagram showing the summer operation of an air conditioning system according to another embodiment. [Figure 10] This is an explanatory diagram showing how the air conditioning system operates during winter. [Figure 11] This is a psychrometric chart showing the winter operation of an air conditioning system. [Figure 12] This is an explanatory diagram showing the winter operation of an air conditioning system according to another embodiment. [Modes for carrying out the invention]

[0026] The embodiments of the present invention will be described below. Figure 1 schematically shows the system of the air conditioning system 1 (air handling unit) according to the embodiment.

[0027] The air conditioning system 1 according to this embodiment comprises a heat storage tank 10, a first heat exchanger 20, a second heat exchanger 30, a wet humidity control unit 40, and a control means 50.

[0028] The heat storage tank 10 introduces humid air (for example, outside air OA, return air RA from the air-conditioned space R, or a mixture thereof) from the inlet side (upstream side), and discharges the introduced humid air as dry air DA, which is at least hotter and less humid than the humid air, from the outlet side (downstream side).

[0029] The heat storage tank 10 has a filled section 11 partitioned by a breathable partition plate and filled with an adsorbent M, and spaces 12 and 13 are provided on the upstream and downstream sides of the filled section 11.

[0030] In one embodiment, the adsorbent M to be filled in the filling section 11 can be, for example, a granulated adsorbent. This adsorbent M can be a known adsorbent that generates heat by adsorbing an adsorbate, such as silica gel or zeolite, and granules of an adsorbent having desired properties such as airflow resistance and heat / mass transfer can be used as an adsorbent with heat storage function. In such cases, a composite made of amorphous aluminum silicate and low-crystallinity clay, such as Huskclay® or a low-temperature regenerative adsorbent of a polymer sorbent, or a conventional adsorbent (silica gel, zeolite, etc.) can be applied as the adsorbent M.

[0031] A humid air introduction duct 51 is connected to the space 12 on the inlet side of the heat storage tank 10 for introducing the aforementioned humid air (outside air OA, return air RA, or a mixture thereof). The humid air introduction duct 51 introduces outside air OA into the heat storage tank 10. The humid air introduction duct 51 may be provided with an air supply means (not shown) for introducing outside air OA into the heat storage tank 10.

[0032] A return air duct 52 is connected to the humid air introduction duct 51 for introducing return air RA from the air-conditioned space R into the heat storage tank 10. One end of the return air duct 52 is connected to the humid air introduction duct 51, and the other end is connected to the exhaust duct 53 for discharging exhaust EA from the air-conditioned space R. In other words, at least a portion of the exhaust EA from the air-conditioned space R flows through the return air duct 52 as return air RA, and this return air RA can be introduced into the heat storage tank 10 via the humid air introduction duct 51.

[0033] The humid air introduction duct 51 and the return air duct 52 are each provided with corresponding dampers D1 and D2. In the air conditioning system 1, the opening and closing of these dampers D1 and D2 controls the introduction of outside air OA and return air RA into the heat storage tank 10. As an example, motor dampers that are easy to control may be used as these dampers D1 and D2. These motor dampers can be opened and closed based on measurements from pressure sensors and temperature / humidity sensors (pressure and temperature / humidity of outside air OA and return air RA), which are not shown in the figure.

[0034] Furthermore, the return air duct 52 and the exhaust duct 53 are each provided with corresponding dampers D3 and D4. In the air conditioning system 1, the opening and closing of these dampers D3 and D4 is controlled to control the discharge of air from the air-conditioned space R (exhaust EA) or the circulation of air to the heat storage tank 10 (return air RA). For example, motor dampers that are easy to control may be used for these dampers D3 and D4.

[0035] Although not shown in the diagram, a heat source not shown is connected to the thermal storage tank 10. The thermal storage tank 10 is configured to supply a heat transfer medium from the heat source to the adsorbent M after it has generated heat through adsorption of the adsorbate (i.e., after the "heat release operation"), thereby enabling the drying of the adsorbent M (i.e., "thermal storage operation"). The heat transfer medium supplied to the thermal storage tank 10 may be, for example, waste heat from a so-called cogeneration system or heat supplied from a renewable energy source such as solar heat. In other words, the heat source not shown may be a building such as a factory equipped with a cogeneration system (e.g., a condenser) or a renewable energy recovery system.

[0036] Furthermore, as shown in Figure 2, the air conditioning system 1 may have multiple heat storage tanks 10 arranged in parallel. As described above, in the heat storage tank 10, it is necessary to alternately perform desorption of adsorbate from the adsorbent M filled in the filling section 11 (heat storage operation) and adsorption of adsorbate onto the adsorbent M (heat release operation). At this time, if only one heat storage tank 10 is installed in the air conditioning system 1, it is necessary to temporarily interrupt the air conditioning of the air-conditioned space R when the heat storage tank 10 is in heat storage operation. In light of these points, as shown in Figure 2, multiple heat storage tanks 10 are arranged in parallel in the air conditioning system 1, and the supply of humid air to each heat storage tank 10 is configured to be switchable. As a result, by alternately performing heat storage operation and heat release operation in each heat storage tank 10, air conditioning of the air-conditioned space R can be performed continuously without interruption.

[0037] An exhaust duct 54 and a dry air introduction duct 55 are independently connected to the space 13, which is the outlet side (downstream side) of the heat storage tank 10. The exhaust duct 54 introduces high-temperature, low-humidity exhaust EA from the heat storage tank 10 to the first heat exchanger 20 and discharges the exhaust EA used for heat exchange in the first heat exchanger 20 to the outside of the system. The dry air introduction duct 55 introduces high-temperature, low-humidity dry air DA from the heat storage tank 10 to the second heat exchanger 30 via the air supply means 55a.

[0038] In the first heat exchanger 20, as will be detailed later in the winter operation of the air conditioning system 1, heat exchange is performed between exhaust EA from the heat storage tank 10 flowing through the exhaust duct 54 and low-temperature, low-humidity outside air OA flowing through the outside air duct 56. The outside air duct 56 is connected to the upstream side of the air supply means 55a in the dry air introduction duct 55, and introduces the low-temperature, low-humidity outside air OA into the first heat exchanger 20, and also introduces the outside air OA used for heat exchange in the first heat exchanger 20 into the dry air introduction duct 55 as dry air DA that is at least hotter and less humid than the outside air OA.

[0039] As described above, the dry air introduction duct 55 is provided with an air supply means 55a downstream of the connection point with the outside air duct 56. Specifically, the air supply means 55a introduces dry air DA from the heat storage tank 10 or the first heat exchanger 20 connected to the inlet side (upstream side) and blows the introduced dry air DA toward the second heat exchanger 30.

[0040] Furthermore, the exhaust duct 54, the dry air introduction duct 55, and the outside air duct 56 are each provided with corresponding dampers D5, D6, and D7. In the air conditioning system 1, the opening and closing of these dampers D5, D6, and D7 is controlled to determine whether dry air DA from the thermal storage tank 10 or dry air DA from the first heat exchanger 20 is introduced into the second heat exchanger 30. More specifically, it is controlled whether high-temperature, low-humidity air discharged from the thermal storage tank 10 is introduced into the second heat exchanger 30 as dry air DA, or whether exhaust air EA is introduced into the first heat exchanger 20, and the outside air OA, after heat exchange with exhaust air EA in the first heat exchanger 20, is introduced into the second heat exchanger 30 as dry air DA. Note that for these dampers D5, D6, and D7, for example, motor dampers that are easy to control may be used.

[0041] The second heat exchanger 30 is a heat exchanger that receives a refrigerant from a predetermined cooling source 31 and performs heat exchange with dry air DA introduced from the inlet side (upstream side) via a dry air introduction duct 55. The second heat exchanger 30 cools and humidifies the introduced high-temperature, low-humidity dry air DA by exchanging heat with the refrigerant from the cooling source 31, and discharges the dry air DA from the outlet side (downstream side) as humidification air HA that has been modified to suitable conditions (temperature and humidity) for introduction into the wet humidity control unit 40. The humidification air HA discharged from the second heat exchanger 30 is introduced into the wet humidity control unit 40 via a modified air introduction duct 57. The temperature of the humidifying air HA supplied from the second heat exchanger 30 to the wet humidity control unit 40 may, for example, be around 40°C to 60°C, and the humidity of the humidifying air HA may, for example, be around 1 to 10%.

[0042] Furthermore, the temperature and type of refrigerant supplied to the second heat exchanger 30 are not particularly limited, and it is sufficient if the dry air DA can be modified to suitable conditions (temperature and humidity) for introduction into the wet humidity control unit 40. For example, the cooling source 31 that supplies refrigerant to the second heat exchanger 30 may be a means for generating cooling water such as a cooling tower, or a well water supply means configured to pump up and supply groundwater, etc.

[0043] The wet-type humidity control unit 40 introduces humidity control air HA from the inlet side (upstream side), and supplies the introduced humidity control air HA as supply air SA having the desired temperature and humidity to the air-conditioned space R via a supply air duct 58 connected to the outlet side.

[0044] Figure 3 is a schematic diagram showing the configuration of the wet humidity control unit 40. As shown in Figure 3, the wet humidity control unit 40 includes a gas-liquid contactor 41, a solution sprayer 42, a solution tank 43, a solution spraying pump 44, and a temperature and humidity measuring instrument (not shown). The solution tank 43, gas-liquid contactor 41, and solution sprayer 42 are stacked in this order from the bottom. Furthermore, these gas-liquid contactor 41, solution sprayer 42, and solution tank 43 are arranged in a casing, which is a housing formed in one example, with an air inlet (inlet for humidifying air HA) 45 and an exhaust port (outlet for supply air SA) 46. In Figure 3, an example is shown where the air inlet 45 is formed on the side of the casing and the exhaust port 46 is formed on the top surface of the casing, but the positions of these air inlet 45 and exhaust port 46 are not particularly limited.

[0045] The gas-liquid contactor 41 has a gas-liquid contact material composed of corrugated plates made of a material with excellent hydrophilicity and absorbency, such as cellulose. In the gas-liquid contactor 41, a liquid dehumidifying agent L, which is supplied from the solution sprayer 42 and flows in a liquid film on the surface of the gas-liquid contact material, is brought into contact with the dehumidifying air HA introduced into the casing through the air inlet 45, thereby dehumidifying the dehumidifying air HA.

[0046] Furthermore, the gas-liquid contact material of the gas-liquid contactor 41 in the wet humidity control unit 40 can be made by bonding sheets or nonwoven fabrics of materials with excellent hydrophilicity and absorbency, such as cellulose-based materials, synthetic fibers, glass fibers, or ceramic fibers, or by integrating cellulose, glass fibers, or ceramic fibers with a binder.

[0047] In one embodiment, the liquid humidity control agent L circulated in the gas-liquid contactor 41 can be a liquid humidity control agent whose relative humidity (gas-liquid equilibrium vapor pressure) at gas-liquid equilibrium changes depending on the temperature and solution concentration, such as a lithium chloride aqueous solution or an ionic liquid aqueous solution, as shown as an example in Figures 4 and 5. In other words, the gas-liquid contactor 41 utilizes the property that the vapor pressure of the humidifying air HA changes depending on the temperature and concentration of the liquid humidity control agent L (the proportion of the humidity control agent in the liquid humidity control agent L), and adjusts the humidifying air HA to supply air SA of a desired temperature and humidity.

[0048] More specifically, in the gas-liquid contactor 41, the humidity-controlled air HA and the liquid humidity-controlled agent L are brought into direct contact (gas-liquid contact). Based on the balance of water vapor pressure between the humidity-controlled air HA and the liquid humidity-controlled agent L (gas-liquid equilibrium), moisture is released from the liquid humidity-controlled agent L into the humidity-controlled air HA, thereby regulating (humidifying) the humidity of the humidity-controlled air HA. The extent to which the liquid humidity-controlled agent L releases moisture can be controlled by the temperature and concentration of the liquid humidity-controlled agent L, as described above. Furthermore, in the gas-liquid contactor 41, the temperature of the humidified air HA is adjusted (cooled) by contacting the liquid dehumidifier L, which is at a lower temperature than the humidified air HA, and by the latent heat (heat of vaporization of water vapor, etc.) released by the liquid dehumidifier L as it releases moisture. In other words, the temperature of the humidified air HA is adjusted (cooled) in the gas-liquid contactor 41 by heat exchange of both sensible and latent heat. In the gas-liquid contactor 41, the temperature and humidity of the humidifying air HA are controlled by the evaporative cooling (latent heat of vaporization) of the water in the liquid dehumidifying agent L. Strictly speaking, a heat of dilution of the liquid dehumidifying agent L is generated at this time, but this heat of dilution is negligible compared to the latent heat of vaporization of water mentioned above. Therefore, in this embodiment, the temperature and humidity control of the humidifying air HA in the gas-liquid contactor 41 can be considered as a so-called isenthalpic change.

[0049] The solution sprayer 42 is located above the gas-liquid contactor 41 and is a supply means that supplies the liquid humidity control agent L from the top of the gas-liquid contactor 41 so that it flows down onto the surface of the gas-liquid contact material in the form of a liquid film.

[0050] The solution tank 43 is located below the gas-liquid contactor 41 and recovers and temporarily stores the liquid humidity control agent L that has been used to control the temperature and humidity of the humidity-controlled air HA in the gas-liquid contactor 41.

[0051] The solution spraying pump 44 introduces the liquid humidity control agent L stored in the solution tank 43 from the inlet side and sends it to the solution sprayer 42 connected to the outlet side. In other words, in the wet humidity control unit 40, the liquid humidity control agent L is circulated in the order of the solution sprayer 42, gas-liquid contactor 41, and solution tank 43 by the action of the solution spraying pump 44. In the illustrated example, the solution spraying pump 44 is located outside the casing of the wet humidity control unit 40, but the solution spraying pump 44 may also be located inside the casing.

[0052] Furthermore, as shown in Figures 1 and 3, a water supply means 47 is connected to the wet humidity control unit 40.

[0053] As described above, the gas-liquid contactor 41 releases moisture from the liquid dehumidifier L into the dehumidifying air HA, thereby adjusting (humidifying) the humidity of the dehumidifying air HA. At this time, the concentration of the liquid dehumidifier L changes (concentrates) as it releases moisture into the dehumidifying air HA, which may alter its dehumidifying function. Therefore, in the wet humidity control unit 40 according to this embodiment, when the wet humidity control unit 40 controls the humidity of the humidity control air HA, water is supplied to the liquid humidity control agent L from the water supply means 47 to dilute the liquid humidity control agent L. More specifically, water is supplied from the water supply means 47 to counteract the concentration (increase in concentration) due to the release of water from the liquid humidity control agent L, thereby adjusting the concentration of the liquid humidity control agent L to a constant or desired value. It is desirable that the concentration of the liquid humidity control agent L be appropriately measured by a concentration measuring instrument (not shown).

[0054] A temperature and humidity meter (not shown) used as a measuring instrument is, in one example, installed on the outlet side (downstream side) of the wet humidity control unit 40, i.e., in the supply air duct 58. The temperature and humidity meter measures the temperature and humidity of the supply air SA discharged from the wet humidity control unit 40. The temperature and humidity of the supply air SA measured by the temperature and humidity meter may be used to control the operation of the water supply means 47 described above.

[0055] The control means 50 controls the supply operation of air supply SA to the air-conditioned space R by the air conditioning system 1, more specifically, the operation of the various elements constituting the air conditioning system 1 (thermal storage tank 10, first heat exchanger 20, second heat exchanger 30, wet humidity control unit 40, and various dampers). The control means 50 may be configured integrally with the air conditioning system 1, or the air conditioning system 1 may be configured to be controlled remotely.

[0056] The air conditioning system 1 according to this embodiment is configured as described above. Next, we will explain an example of the control of the air conditioning system 1 described above. Note that the various numerical values ​​used in the following explanation are examples only.

[0057] <Summer operation of air conditioning system 1> First, we will explain the summer operation of the air conditioning system 1. Figures 6 and 7 are schematic diagrams and psychrometric charts showing examples of the operation of the air conditioning system 1 during summer operation. In Figure 6, among the various dampers provided by the air conditioning system 1, dampers in the open state are shown in white, and dampers in the closed state are shown in black. Also, among the various ducts through which air flows, ducts through which air is flowing are shown with thick lines, and ducts through which air is not flowing are shown with thin lines.

[0058] For summer operation of the air conditioning system 1, first, damper D1 is opened and damper D2 is closed, thereby introducing outside air OA (34.4°C, 57.2%RH (19.7g / kgDA)) into the heat storage tank 10 via the humid air introduction duct 51 (step St1 in Figure 7).

[0059] Next, in the heat storage tank 10, damper D6 is opened and dampers D5 and D7 are closed. As a result, the outside air OA introduced into the heat storage tank 10 is sent from the space 12 of the heat storage tank 10 to the filling section 11 and passes through the adsorbent M filled in the filling section 11. At this time, moisture in the outside air OA is adsorbed by the adsorbent M, which causes the adsorbent M to generate heat, producing dry air DA (104°C, 0.4%RH (2.9g / kgDA)) which is hotter and less humid than the outside air OA. This dry air DA is then sent from the space 13 to the downstream side (air supply means 55a) via the dry air introduction duct 55 (step St2 in Figure 7). Furthermore, the heat storage tank 10, which has been used for drying the outside air OA (heat dissipation operation), is then subjected to heat storage operation (desorption of moisture from the adsorbent M) by supplying a heat transfer medium from a heat source (not shown), thereby regenerating the adsorbent M and enabling heat dissipation operation again.

[0060] Furthermore, it is desirable that the temperature of the dry air DA sent from the heat storage tank 10 to the second heat exchanger 30 downstream be controlled to a constant level, from the viewpoint of ease of control of the second heat exchanger 30, and more specifically, from the viewpoint of controlling the temperature of the refrigerant supplied to the second heat exchanger 30 to a constant level.

[0061] Therefore, it is desirable that the timing of supplying dry air DA from the heat storage tank 10 to the second heat exchanger 30, in other words, the timing of opening the damper D6, be controlled after the temperature of the adsorbent M in the heat storage tank 10 has stabilized (reached equilibrium). Specifically, during heat dissipation operation, the temperature of the adsorbent M rises sharply after the reaction starts (after adsorption of moisture from the ambient air OA begins) (time t1 in Figure 8), then stabilizes (time t2 in Figure 8), and then gradually decreases (time t3 in Figure 8). The temperature of the adsorbent M at the time of temperature stabilization (time t2) (maximum temperature) and the duration (reaction time) vary depending on the amount and type of adsorbent M used. Therefore, in the heat storage tank 10 according to this embodiment, it is desirable to start supplying dry air DA to the second heat exchanger 30 (opening damper D6) at time t2 when the temperature of the adsorbent M has stabilized (when the temperature of the adsorbent M is at equilibrium), and to stop supplying dry air DA (closing damper D6) before time t3 when the temperature drops.

[0062] The dry air DA discharged from the heat storage tank 10 is then sent to the second heat exchanger 30 via the air supply means 55a. In the second heat exchanger 30, the dry air DA from the heat storage tank 10 is reformed into humidification air HA (42.0°C, 5.7%RH (2.9g / kgDA)) for introduction into the wet humidity control unit 40 through heat exchange with the refrigerant from the cooling source 31 (step St3 in Figure 7). The humidification air HA is then introduced into the wet humidity control unit 40 via the reformed air introduction duct 57.

[0063] Next, the humidity-controlled air HA introduced into the wet humidity control unit 40 is sent from the air inlet 45 to the gas-liquid contactor 41, where it comes into direct contact (gas-liquid contact) with the liquid humidity control agent L flowing in a liquid film on the surface of the gas-liquid contact material. At this time, due to the balance of water vapor pressure between the humidity-controlled air HA and the liquid humidity control agent L (gas-liquid equilibrium), moisture from the liquid humidity control agent L is released into the humidity-controlled air HA, causing the humidity-controlled air HA to become the supply air SA (24.7°C, 45.0%RH (9.7g / kgDA)), which is colder and more humid than the humidity-controlled air HA (step St4 in Figure 7).

[0064] Furthermore, the change from the humidifying air HA to the supply air SA is achieved by utilizing the evaporative cooling of the moisture in the liquid humidity control agent L, as described above, and can be considered a so-called isenthalpic change. In other words, the temperature and humidity of the humidifying air HA introduced into the wet humidity control unit 40 are determined by the temperature and humidity of the supply air SA supplied to the air-conditioned space R (in this embodiment, 24.7°C, 45.0%RH (9.7g / kgDA)). Therefore, the cooling and humidification of the dry air DA in the second heat exchanger 30 (generation of humidified air HA) is performed in order to generate supply air SA with the desired temperature and humidity, and the cooling capacity of the second heat exchanger 30 (refrigerant temperature from the cooling source 31) is determined by the temperature and humidity of the supply air SA supplied to the air-conditioned space R.

[0065] In the wet humidity control unit 40, the temperature and concentration of the liquid humidity control agent L, which is brought into gas-liquid contact with the humidity control air HA, are controlled to values ​​that allow the humidity control air HA to be adjusted to the desired temperature and humidity (in this embodiment, 24.7°C, 45.0%RH (9.7g / kgDA)) by referring to the relationship shown in Figures 4 and 5, for example.

[0066] Furthermore, in this embodiment, in order to suppress the increase in concentration (concentration) due to the release of moisture from the liquid humidity control agent L, water is supplied to the liquid humidity control agent L from the water supply means 47 when generating the supply air SA, as described above. The amount of water supplied to the liquid humidity control agent L can be controlled, for example, based on the relative humidity of the supply air SA discharged from the wet humidity control unit 40 or the concentration of the liquid humidity control agent L circulating within the wet humidity control unit 40.

[0067] The supply air SA generated by the wet humidity control unit 40 is then supplied to the air-conditioned space R via the supply air duct 58. The supply air SA supplied to the air-conditioned space R is then discharged outside the system as exhaust air EA via the exhaust duct 53.

[0068] The summer operation of air conditioning system 1 is controlled as described above. Furthermore, at least a portion of the exhaust air EA discharged from the air-conditioned space R may be introduced into the thermal storage tank 10 as return air RA via the return air duct 52, as shown in Figure 9. In other words, the mixed air of outside air OA and return air RA may be introduced into the thermal storage tank 10 as humidified air via the humidified air introduction duct 51 to air-condition the air-conditioned space R. In this case, it is desirable that the airflow rate of the mixed air introduced into the thermal storage tank 10 be controlled to be equivalent to the airflow rate when only outside air OA is introduced into the thermal storage tank 10 without introducing return air RA. The mixing ratio of outside air OA and return air RA that make up the mixed air (the respective airflow volumes of outside air OA and return air RA) may be appropriately adjusted by the opening degrees of dampers D1 and D2.

[0069] <Winter operation of air conditioning system 1> Next, we will describe the winter operation of the air conditioning system 1. Figures 10 and 11 are schematic diagrams and psychrometric charts showing examples of the operation of the air conditioning system 1 during winter operation. In the following explanation, detailed explanations of operations that are substantially the same as those in summer operation will be omitted.

[0070] For winter operation of the air conditioning system 1, first, damper D7 is opened, thereby introducing outside air OA (-1.2°C, 41.1%RH (1.4g / kgDA)) into the first heat exchanger 20 via the outside air duct 56 (step St1 in Figure 11).

[0071] On the heat storage tank 10 side, damper D2 is opened and damper D1 is closed, thereby introducing return air RA (26.0℃, 55.0%RH (11.6g / kgDA)) into the heat storage tank 10 via the humid air introduction duct 51 (step St2 in Figure 11).

[0072] Next, in the heat storage tank 10, damper D5 is opened and damper D6 is closed. As a result, the return air RA introduced into the heat storage tank 10 is sent from the space 12 of the heat storage tank 10 to the filling section 11 and passes through the adsorbent M that is filled in the filling section 11. At this time, moisture in the return air RA is adsorbed by the adsorbent M, which causes the adsorbent M to generate heat, producing exhaust EA (69.3℃, 0.2%RH (0.4g / kgDA)) which is hotter and less humid than the return air RA. This exhaust EA is then introduced from the space 13 to the first heat exchanger 20 via the exhaust duct 54 (step St3 in Figure 11). Furthermore, the heat storage tank 10, which has been used for drying the return air RA (heat dissipation operation), is then subjected to heat storage operation (desorption of moisture from the adsorbent M) by supplying a heat transfer medium from a heat source (not shown), thereby regenerating the adsorbent M and enabling heat dissipation operation again.

[0073] In the first heat exchanger 20, heat exchange takes place between the outside air OA introduced via the outside air duct 56 and the exhaust air EA introduced via the exhaust duct 54. In the first heat exchanger 20, the heat exchange between the outside air OA and the exhaust air EA generates dry air DA (55.2°C, 1.4%RH (1.4g / kgDA)) which is at least hotter and less humid than the outside air OA (step St4 in Figure 11). The dry air DA is then introduced to the air supply means 55a via the dry air introduction duct 55, and further introduced from the air supply means 55a to the wet humidity control unit 40 via the modified air introduction duct 57. In other words, during winter operation of the air conditioning system 1, dry air DA from the first heat exchanger 20 is introduced into the wet humidity control unit 40 as humidity control air HA without going through heat exchange with the refrigerant in the second heat exchanger 30.

[0074] Next, the humidity-controlled air HA introduced into the wet humidity control unit 40 is sent from the air inlet 45 to the gas-liquid contactor 41, where it comes into direct contact (gas-liquid contact) with the liquid humidity control agent L flowing in a liquid film on the surface of the gas-liquid contact material. At this time, due to the balance of water vapor pressure between the humidity-controlled air HA and the liquid humidity control agent L (gas-liquid equilibrium), moisture from the liquid humidity control agent L is released into the humidity-controlled air HA, causing the humidity-controlled air HA to become the supply air SA (27.0°C, 55%RH (12.3g / kgDA)), which is colder and more humid than the humidity-controlled air HA (step St5 in Figure 11). The change from humidity-controlled air HA to supply air SA is due to the evaporative cooling of moisture in the liquid humidity control agent L, as described above, and can be considered a so-called isenthalpic change.

[0075] In the wet humidity control unit 40, the temperature and concentration of the liquid humidity control agent L, which is brought into gas-liquid contact with the humidity control air HA, are controlled to values ​​that allow the humidity control air HA to be adjusted to the desired temperature and humidity (in this embodiment, 27.0°C, 55%RH (12.3g / kgDA)) by referring to the relationship shown in Figures 4 and 5, for example.

[0076] Furthermore, in this embodiment, in order to suppress the increase in concentration (concentration) due to the release of moisture from the liquid humidity control agent L, water is supplied to the liquid humidity control agent L from the water supply means 47 when generating the supply air SA, as described above. The amount of water supplied to the liquid humidity control agent L can be controlled, for example, based on the relative humidity of the supply air SA discharged from the wet humidity control unit 40 or the concentration of the liquid humidity control agent L circulating within the wet humidity control unit 40.

[0077] The supply air SA generated in the wet humidity control unit 40 is then supplied to the air-conditioned space R via the supply air duct 58. The supply air SA supplied to the air-conditioned space R is introduced into the heat storage tank 10 as return air RA via the exhaust duct 53 and the return air duct 52, and is then subjected to further heat exchange with outside air OA in the first heat exchanger 20 before being discharged outside the system as exhaust air EA.

[0078] The winter operation of air conditioning system 1 is controlled as described above. Furthermore, the humid air introduced into the heat storage tank 10 may be mixed with outside air OA, as shown in Figure 12, similar to the summer operation described above. In other words, the mixed air of return air RA and outside air OA may be introduced into the heat storage tank 10 via the humid air introduction duct 51 as humid air, and the air conditioning of the space to be air-conditioned R may be performed. In this case, it is desirable that the airflow rate of the mixed air introduced into the heat storage tank 10 be controlled to be equivalent to the airflow rate when only return air RA is introduced into the heat storage tank 10 without introducing outside air OA. The mixing ratio of return air RA and outside air OA that make up the mixed air (the respective airflow volumes of return air RA and outside air OA) may be appropriately adjusted by the opening degrees of dampers D1 and D2.

[0079] In winter operation of the air conditioning system 1 shown in Figures 10 to 12, the air conditioning of the space R was performed using dry air DA generated from the outside air duct 56 via the first heat exchanger 20. However, the introduction route of outside air OA for winter operation is not limited to this. Specifically, as shown in Figures 6 and 9 for summer operation, for example, the air conditioning of the space to be air-conditioned may be performed using dry air DA generated in the thermal storage tank 10 instead of the first heat exchanger 20. Furthermore, when the air conditioning of the space to be air-conditioned is performed using only the dry air DA generated in the thermal storage tank 10 during winter operation, in other words, when the first heat exchanger 20 is not used during winter operation, the first heat exchanger 20, the exhaust duct 54, and the outside air duct 56 may be omitted from the configuration of the air conditioning system 1 as appropriate.

[0080] <Effects and Effects of the Air Conditioning System 1 According to the Embodiment> As described above, the air conditioning system 1 according to the technology of this disclosure omits the regenerator and heat pump compared to the conventional processing machine (air conditioning system) shown in Patent Document 1, and instead, a heat storage tank 10 and a second heat exchanger 30 are arranged. Furthermore, in the wet humidity control unit 40 according to the technology of this disclosure (corresponding to the processing machine described in Patent Document 1), the solution-heat medium heat exchanger (corresponding to the three-fluid heat exchanger in Patent Document 1) for adjusting the temperature of the solution (liquid humidity control agent L) can be omitted.

[0081] Conventionally, heat pumps used to exchange heat between a hygroscopic liquid (liquid humidity control agent L) circulating within the processing unit and an external heat source primarily use fluorocarbon refrigerants. In this case, it has been difficult to drastically reduce the environmental burden (carbon dioxide emissions) in the air conditioning system. In this regard, in the air conditioning system 1 according to the embodiment, instead of a heat pump using a fluorocarbon refrigerant, the temperature and humidity of the humid air are controlled by a heat storage tank 10 that utilizes chemical heat storage and a second heat exchanger 30 that performs heat exchange with a refrigerant using cooling water or well water, and then provided for gas-liquid contact with a liquid humidity control agent L. In other words, air conditioning without using fluorocarbon refrigerants as in the conventional method is achieved, improving the environment within the air-conditioned space R and further significantly reducing carbon dioxide emissions.

[0082] Furthermore, according to this embodiment, the heat storage tank 10 and the second heat exchanger 30 connected to the wet humidity control unit 40 can adjust the temperature and humidity of humid air and liquid humidity control agent L using waste heat from a cogeneration system (heat storage tank 10) or well water (second heat exchanger 30). Therefore, there is no need to connect a separate heating or cooling source to adjust the temperature and humidity of the humid air or liquid dehumidifier L, and from this perspective as well, the environmental burden can be appropriately reduced.

[0083] Furthermore, in the liquid desiccant type wet humidity control unit 40 of the technology disclosed herein, which is provided in the air conditioning system 1, high humidification capacity and high temperature control are obtained by controlling only the temperature and concentration of the liquid humidity control agent L circulating inside the wet humidity control unit 40, or more specifically, by controlling only the water supply from the water supply means 47 in this embodiment, thereby appropriately adjusting the temperature and humidity of the supply air SA supplied to the air-conditioned space R. For this reason, the configuration of the wet humidity control unit 40 for controlling the temperature and humidity of the supply air SA, and by extension the entire air conditioning system 1, can be simplified compared to conventional systems. Furthermore, in the wet humidity control unit 40 according to this embodiment, the temperature and humidity of the supply air SA can be adjusted simply by controlling the water supply from the water supply means 47. Therefore, compared to conventional steam humidification or electric humidification type humidity control devices, power consumption can be significantly reduced, and the environmental burden can be reduced even more appropriately.

[0084] Furthermore, according to the air conditioning system 1 of this embodiment, as described above, there is no need to circulate a corrosive liquid humidity control agent L (for example, an aqueous lithium chloride solution) to a heat exchanger for heat exchange with an external heat source. Conventionally, when hygroscopic liquids are circulated through a heat exchanger, the heat exchanger must be made of a corrosion-resistant material (such as titanium), which resulted in significant costs for the design (construction) of the air conditioning system. In this respect, according to this embodiment, since it is not necessary to circulate the liquid humidity control agent L through a heat exchanger for heat exchange with an external heat source, the various pipe materials in the air conditioning system 1 do not need to be made of corrosion-resistant materials. For this reason, the types of pipe materials that can be used when constructing the air conditioning system 1 are not greatly limited, and costs can be reduced compared to conventional systems.

[0085] Furthermore, in the wet humidity control unit 40 relating to the technology disclosed herein, as described above, the regenerator, heat pump, and solution-heat medium heat exchanger are omitted compared to conventional processing machines (air conditioning systems). This is because, as described above, the heat storage tank 10 and the second heat exchanger 30 can adjust the temperature and humidity of the humid air and liquid humidity control agent L, and the liquid humidity control agent L can be regenerated by water supply from the water supply means 47. Furthermore, according to the wet humidity control unit 40 (processing machine) of this embodiment, there is no need to provide a regenerator, a heat pump, and a solution-heat transfer medium heat exchanger, so the overall footprint of the unit and the size of each element (volume of the solution tank 43 and size of the solution spraying pump 44) can be reduced compared to conventional systems.

[0086] Thus, the wet-type humidity control unit 40 according to this embodiment, which does not include a regenerator, heat pump, and solution-heat medium heat exchanger, can be made smaller in size compared to the conventional air conditioning unit (processing machine) shown in Patent Document 1, and as shown in Figure 1, it can be easily incorporated into the air conditioning system 1 (air handling unit) that supplies supply air SA to the air-conditioned space R.

[0087] It is known that the lithium chloride aqueous solution and ionic liquid aqueous solution used as the liquid humidity control agent L in the wet humidity control unit 40 have high antibacterial properties. The inventors then conducted diligent studies and confirmed that influenza A virus is inactivated in a short time in the liquid humidity control agent L according to the embodiment.

[0088] In light of the above, in the air conditioning system 1 according to this embodiment, the supply air SA supplied to the air-conditioned space R is brought into direct contact (gas-liquid contact) with the liquid dehumidifying agent L in the gas-liquid contactor 41 of the wet dehumidifying unit 40, thereby sterilizing the dehumidifying air HA introduced into the wet dehumidifying unit 40, that is, inactivating the viral components contained in the dehumidifying air HA. In other words, in the wet dehumidifying unit 40 of the air conditioning system 1 according to this embodiment, it is expected that the supply air SA can be supplied to the air-conditioned space R after undergoing inactivation (sterilization treatment) of the viral components contained in the dehumidifying air HA. Therefore, according to the technology disclosed herein, it is possible to provide an air conditioning system that has a disinfecting effect against viruses and other pathogens, and to provide an appropriate humidity-controlled environment and a virus-resistant environment in the air-conditioned space R.

[0089] Furthermore, in order to effectively enjoy the sterilization effects described above, it is desirable that the humidification treatment of the humidity-controlled air HA in the wet humidity control unit 40 be aimed at a relative humidity of approximately 30-70%. If the relative humidity falls below 30%, in other words, if the concentration of the liquid humidity control agent L is high, there is a risk that the humidity control agent components may precipitate from the liquid humidity control agent L. On the other hand, if the relative humidity exceeds 70%, in other words, if the concentration of the liquid humidity control agent L is low, there is a risk that the liquid humidity control agent L will not be able to maintain the sterilization capacity of the humidity-controlled air HA as described above. In light of the above points, the wet-type humidity control unit 40 can more effectively provide a suitable humidity-controlled and virus-resistant environment for the air-conditioned space R by generating supply air SA targeting a relative humidity of approximately 30-70%. [Industrial applicability]

[0090] The present invention is useful for air conditioning systems to be introduced in facilities that require high temperature and humidity control and, in particular, a virus-resistant environment. The target facilities mentioned above primarily include hospitals, special nursing homes for the elderly, food processing plants, paint factories, and sake breweries, but the facilities to which the air conditioning system 1 relating to the technology disclosed herein will be introduced are not limited to these. [Explanation of Symbols]

[0091] 1. Air conditioning system 10 Heat storage tank 11 Filling section 12, 13 Space 20 1st heat exchanger 30 Second heat exchanger 31 Cold source 40 Wet-type humidity control unit 41. Gas-liquid contactor 42 Solution sprayer 43 Solution Tanks 44 Solution spray pump 47 Water supply means 50 Control means M Adsorbent L Liquid Humidity Control Agent R Air-conditioned space

Claims

1. A heat storage tank containing an adsorbent that generates heat by adsorbing an adsorbent, and which discharges introduced humid air as dry air that is hotter and less humid than the humid air, A heat exchanger that generates humidified air from the dry air by heat exchange with a refrigerant supplied from a cooling source, An air conditioning system comprising: a wet humidity control unit that adjusts the temperature and humidity of the humidity control air by gas-liquid contact with a liquid humidity control agent to generate supply air to be supplied to a space to be air-conditioned.

2. The aforementioned wet humidity control unit, A gas-liquid contactor for bringing the liquid humidity control agent and the humidity control air into gas-liquid contact, A solution dispenser that supplies the liquid humidity control agent to the upper part of the gas-liquid contactor, A solution tank for recovering the liquid humidity control agent is located at the lower part of the gas-liquid contactor, The air conditioning system according to claim 1, further comprising a solution spraying pump for dispensing the liquid dehumidifying agent from the solution tank toward the solution sprayer.

3. The aforementioned wet humidity control unit, A measuring means including at least one of the following: a concentration measuring meter for measuring the concentration of the liquid humidity control agent, or a humidity measuring meter for measuring the humidity of the supply air led out from the wet humidity control unit; The system further comprises a water supply means for diluting the liquid humidity control agent, The air conditioning system according to claim 2, wherein the amount of water supplied from the water supply means to the liquid humidity control agent is controlled based on the results of the measurement by the measuring means.

4. A damper that controls the introduction of the dry air from the heat storage tank to the heat exchanger by opening and closing, The system further comprises control means for controlling the operation of the damper, The air conditioning system according to claim 1, wherein the control means performs control to open the damper after the adsorbent has started to generate heat and the temperature of the adsorbent has reached an equilibrium state.

5. The air conditioning system according to any one of claims 1 to 4, further comprising a return air path for introducing exhaust air from the space to be air-conditioned as humid air into the heat storage tank.

6. The system further comprises another heat exchanger that generates other dry air by heat exchange between the dry air discharged from the heat storage tank and the introduced outside air, The air conditioning system according to any one of claims 1 to 4, wherein the other heat exchanger supplies the other dry air to the heat exchanger instead of the dry air discharged from the heat storage tank.

7. The air conditioning system according to any one of claims 1 to 4, wherein the liquid humidity control agent is a liquid humidity control agent selected from at least one of a lithium chloride aqueous solution or an ionic liquid aqueous solution.

8. A method for air conditioning a space to be air-conditioned using an air conditioning system, A step of converting humid air introduced into the aforementioned air conditioning system into dry air that is hotter and less humid than the humid air by using an adsorbent that generates heat by adsorbing an adsorbent, A process of generating humidified air from the dry air by heat exchange with a refrigerant, An air conditioning method comprising the step of adjusting the temperature and humidity of the humidifying air by gas-liquid contact with a liquid humidity control agent to generate supply air to be supplied to the air-conditioned space.

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