JP2017072347A - Air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning system capable of reducing energy used to regenerate a regeneration-side element.SOLUTION: An air conditioning system includes a control portion S executing switching processing for respectively switching a pair of humidity adjustment elements E to an air supply-side element Ea and a regeneration-side element Eb, and further includes outdoor air circulation passages L3a, L3b for allowing the outdoor air OA taken from an outdoor space to be passed through a humidity adjustment portion of the regeneration-side element Eb as regeneration air RA and discharged to the outdoor space, a heating portion 21 disposed on the outdoor air circulation passages L3a, L3b, and humidity detection portions 34B, 35B detecting a humidity of the regeneration air R passing through the humidity adjustment portion of the regeneration-side element Eb. The control portion S is constituted to execute the regeneration processing for allowing the regeneration air R heated by the heating portion 21 to pass through the humidity adjustment portion of the regeneration-side element Eb, and stopping the regeneration processing when the humidity detected by the humidity detection portion 34B, 35B becomes less than a predetermined humidity during the execution of the regeneration processing.SELECTED DRAWING: Figure 1

Description

  The present invention provides an air supply passage for supplying outdoor air taken in from an outdoor space to the indoor space, an exhaust passage for exhausting indoor air taken out from the indoor space to the outdoor space, and moisture in the humidity-controlling air that passes through the air supply passage. A pair of humidity control elements each having a humidity control unit that desorbs moisture to the passing regeneration air and a cooling unit that absorbs heat of adsorption accompanying the moisture adsorption of the humidity control unit by the passing cooling air; Outdoor air flowing through the air supply passage through any one of the humidity control elements passes through the humidity control section as the humidity control air, and the cooling air passes through the cooling section. In the state where the other air conditioning element is the air supply side element, and the regeneration air is the regeneration side element through which the regeneration air passes through the humidity control unit, each of the pair of humidity control elements is the air supply side element. A switching mechanism for switching to the reproduction side element and a control for controlling the operation. About air conditioning system and a part.

  In such an air conditioning system, one humidity control element is used as an air supply side element, and moisture contained in the humidity control air is adsorbed in the humidity control section, while cooling air is passed through the cooling section to absorb the humidity control section. In the humidity control part of the air supply side element, the state is configured to absorb the heat of adsorption generated along with the other humidity control element as the regeneration side element, and the moisture adsorbed on the humidity control part is desorbed into the regeneration air. Humidity-controlled air from which moisture has been removed is supplied to the indoor space. That is, the regeneration side element is regenerated while dehumidification is performed by the supply side element.

  When a predetermined time elapses in a state where one humidity control element is an air supply side element and the other humidity control element is a regeneration side element, the one humidity control element and the other humidity control element are changed to the air supply side element. And switching between the regeneration side element and one humidity control element as the regeneration side element, and the other humidity control element as the supply side element and passing through the humidity control section of the supply side element. The outdoor air from which moisture has been removed is supplied to the indoor space. By repeatedly performing such switching processing, outdoor air can be continuously dehumidified and supplied to the indoor space.

  As a conventional example of such an air conditioning system, a heat exchanger provided in a heat pump is always provided in a period from when one humidity control element is switched from an air supply side element to a regeneration side element until it is switched again to the air supply side element. There is one that supplies the air for regeneration heated by the air to the humidity control section of the humidity control element (regeneration side element) (for example, see Patent Document 1).

JP 9-318127 A

  In the air conditioning system described in Patent Document 1, the humidity control of the regeneration-side element is always performed during the period from when one humidity control element is switched from the supply-side element to the regeneration-side element and then again to the supply-side element. The section is supplied with heated regeneration air. That is, even when the moisture adsorbed by the humidity control section of the regeneration side element is sufficiently desorbed, the supply of regeneration air heated by the heat pump is continued until the switching process is performed, and more than necessary. Thus, the reproduction side element is reproduced. Therefore, there is a problem that regeneration of the reproduction side element is not stopped at an appropriate time, and energy used for reproduction of the reproduction side element increases.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide an air conditioning system capable of reducing energy used for regeneration of a regeneration side element.

The air conditioning system according to the present invention is:
An air supply passage for supplying outdoor air taken from the outdoor space to the indoor space;
An exhaust passage for exhausting indoor air taken out from the indoor space to the outdoor space;
A humidity control unit that adsorbs or desorbs moisture in the passing humidity conditioning air, and a cooling unit that absorbs the heat of adsorption accompanying the moisture adsorption of the humidity control unit by the passing cooling air. A pair of humidity control elements, respectively,
Outdoor air flowing through the air supply passage through any one of the pair of humidity control elements passes through the humidity control section as the humidity control air, and the cooling air passes through the cooling section. In a state where the air supply side element that passes through and the other humidity control element is the regeneration side element through which the regeneration air passes through the humidity control unit, each of the pair of humidity control elements is replaced with the air supply side element. An air conditioning system comprising a switching mechanism for switching between an element and the regeneration side element, and a control unit for controlling the operation,
An outdoor air circulation passage for passing outdoor air taken in from an outdoor space as the regeneration air to the outdoor space through the humidity control portion of the regeneration-side element, and a heating unit provided in the outdoor air circulation passage; A humidity detection unit that detects the humidity of the regeneration air that has passed through the humidity control unit of the regeneration side element;
The control unit uses the switching mechanism to switch each of the pair of humidity control elements between the air supply side element and the regeneration side element, and the regeneration air heated by the heating unit. A regeneration process that passes through the humidity control unit of the regeneration-side element, and a stop process that stops the regeneration process when the humidity detected by the humidity detection unit is less than a set humidity during the regeneration process. It is in the point comprised so that it may implement.

According to the above characteristic configuration, the humidity detection unit detects the humidity of the regeneration air after passing through the humidity control unit of the reproduction side element. Therefore, when the humidity detected by the humidity detection unit is high, the humidity detection unit It can be seen that when the amount of water remaining in the humidity control unit is large and the humidity detected by the humidity detection unit is low, the amount of water remaining in the humidity control unit of the reproduction-side element is small.
In addition, when the humidity detected by the humidity detection unit becomes less than the set humidity, a stop process for stopping the regeneration process is performed. Accordingly, when the moisture content remaining in the humidity control section of the regeneration-side element is used as the supply-side element next time, the moisture content contained in the humidity-control air can be sufficiently adsorbed. By making it correspond to the humidity detected by the humidity detection unit during stoppage, the stop process is performed at an appropriate time.

  Thereby, it is possible to prevent the regeneration process from being performed more than necessary, and the energy supplied to the heating unit for heating the air necessary for the regeneration, or the heated air to the heating unit of the regeneration side element It is possible to reduce the energy supplied to a power source such as a blower for flowing into the fan.

  Further, when the regeneration process to the regeneration side element is stopped, the heated regeneration air is stopped from passing through the regeneration side element, and thereafter, the regeneration side element is used as an air supply side element by the switching process. When it is done, it can be expected that the temperature of the humidity control section is low. Therefore, it is possible to satisfactorily dehumidify the air for humidity control by the humidity control section whose temperature has been lowered.

The air conditioning system according to the present invention is:
An air supply passage for supplying outdoor air taken from the outdoor space to the indoor space;
An exhaust passage for exhausting indoor air taken out from the indoor space to the outdoor space;
A humidity control unit that adsorbs or desorbs moisture in the passing humidity conditioning air, and a cooling unit that absorbs the heat of adsorption accompanying the moisture adsorption of the humidity control unit by the passing cooling air. A pair of humidity control elements, respectively,
Outdoor air flowing through the air supply passage through any one of the pair of humidity control elements passes through the humidity control section as the humidity control air, and the cooling air passes through the cooling section. In a state where the air supply side element that passes through and the other humidity control element is the regeneration side element through which the regeneration air passes through the humidity control unit, each of the pair of humidity control elements is replaced with the air supply side element. An air conditioning system comprising a switching mechanism for switching between an element and the regeneration side element, and a control unit for controlling the operation,
An outdoor air circulation passage for passing outdoor air taken in from an outdoor space as the regeneration air to the outdoor space through the humidity control portion of the regeneration-side element, and a heating unit provided in the outdoor air circulation passage; A humidity detection unit that detects the humidity of the regeneration air that has passed through the humidity control unit of the regeneration side element; and a temperature detection unit that detects the temperature of the regeneration air that has passed through the humidity control unit of the regeneration side element; With
The control unit uses the switching mechanism to switch each of the pair of humidity control elements between the air supply side element and the regeneration side element, and the regeneration air heated by the heating unit. When the temperature of the regeneration air detected by the temperature detection unit is equal to or higher than a preset temperature during the regeneration process that is passed through the humidity control unit of the regeneration side element and the regeneration process, or the humidity In the point which is comprised so that the said stop process may be implemented when the humidity of the said reproduction | regeneration air detected by the detection part becomes less than the said setting humidity.

According to the above characteristic configuration, the humidity detection unit detects the humidity of the regeneration air after passing through the humidity control unit of the reproduction side element. Therefore, when the humidity detected by the humidity detection unit is high, the humidity detection unit It can be seen that when the amount of water remaining in the humidity control unit is large and the humidity detected by the humidity detection unit is low, the amount of water remaining in the humidity control unit of the reproduction-side element is small.
In addition, when the humidity detected by the humidity detection unit becomes less than the set humidity, a stop process for stopping the regeneration process is performed. Accordingly, when the moisture content remaining in the humidity control section of the regeneration-side element is used as the supply-side element next time, the moisture content contained in the humidity-control air can be sufficiently adsorbed. By making it correspond to the humidity detected by the humidity detection unit during stoppage, the stop process is performed at an appropriate time.

  Thereby, it is possible to prevent the regeneration process from being performed more than necessary, and the energy supplied to the heating unit for heating the air necessary for the regeneration, or the heated air to the heating unit of the regeneration side element It is possible to reduce the energy supplied to a power source such as a blower for flowing into the fan.

  Further, when the regeneration process to the regeneration side element is stopped, the heated regeneration air is stopped from passing through the regeneration side element, and thereafter, the regeneration side element is used as an air supply side element by the switching process. When it is done, it can be expected that the temperature of the humidity control section is low. Therefore, it is possible to satisfactorily dehumidify the air for conditioning by the humidity control section whose temperature is low.

  Also, regarding temperature, when the moisture adsorbed on the humidity control part of the regeneration-side element is desorbed to the regeneration air as water vapor, the amount of heat equivalent to the increase in the latent heat of the water vapor is used for regeneration. You will be deprived of the air. In other words, the moisture of the humidity control part of the regeneration side element is desorbed to the regeneration air due to isenthalpy, and the temperature of the regeneration air decreases, so the temperature of the regeneration air that has passed through the humidity control part of the regeneration side element By detecting this, it is possible to estimate the amount of moisture remaining in the reproduction-side element.

In this feature configuration, the temperature detection unit detects the temperature of the regeneration air after passing through the humidity control unit of the regeneration side element. For this reason, when the temperature detected by the temperature detection unit is low, the amount of heat for evaporating the moisture adsorbed in the humidity control unit of the regeneration element into the regeneration air is deprived from the regeneration air. It can be seen that there is a large amount of moisture desorbed from the humidity control unit, and that there is a large amount of moisture remaining in the regeneration-side element.If the temperature detected by the temperature detection unit is high, the regeneration air is transferred to the humidity control unit. Since the amount of heat for evaporating the adsorbed moisture in the regeneration air is not taken away from the regeneration air, there is little moisture desorbed from the humidity control section, and the amount of moisture remaining on the regeneration side element is reduced. You can see that
Moreover, a stop process is implemented when the temperature detected by the temperature detection part becomes more than preset temperature. Therefore, when the amount of moisture remaining in the humidity control section of the regeneration-side element is used as the supply-side element at this set temperature, the moisture contained in the humidity-control air can be sufficiently adsorbed. If the temperature is detected by the temperature detection unit, the stop process is performed at an appropriate time.

  In this feature configuration, when the temperature of the regeneration air detected by the temperature detection unit is equal to or higher than the set temperature, or when the humidity of the regeneration air detected by the humidity detection unit is less than the set humidity In addition, since the stop process is performed, the stop process can be performed at an appropriate time using both temperature and humidity as indices.

  Thereby, it is possible to prevent the regeneration process from being performed more than necessary, and the energy supplied to the heating unit for heating the air necessary for the regeneration, or the heated air to the heating unit of the regeneration side element It is possible to reduce the energy supplied to a power source such as a blower for flowing into the fan.

Further features of the air conditioning system according to the present invention are as follows:
The room air flowing through the exhaust passage is configured to pass through the cooling portion of the air supply side element as the cooling air.

  According to the above characteristic configuration, since the indoor air flowing through the exhaust passage passes through the cooling portion of the air supply side element, the indoor air exhausted to the outside is effectively used as the cooling air, and the humidity control air Dehumidification can be performed satisfactorily. That is, when the outside air temperature is high, the temperature of the room air is normally kept lower than the outside air temperature by air conditioning or the like, so that the low temperature room air is used as cooling air to pass through the cooling section of the supply side element. Thereby, the humidity control part of the air supply side element is cooled. As a result, moisture is efficiently adsorbed in the humidity control section of the air supply side element, so that the humidity control air can be dehumidified while effectively using the low-temperature indoor air as the cooling air.

The schematic block diagram which shows the 1st state of the air conditioning system which concerns on 1st Embodiment. The schematic block diagram which shows the 2nd state of the air conditioning system which concerns on 1st Embodiment. Perspective view of humidity control element Exploded perspective view of humidity control element Expanded sectional view of humidity control element The figure which shows the time of the switching process which concerns on 1st Embodiment The figure which shows the time of the stop process which concerns on 1st Embodiment The figure which shows the time of the stop process which concerns on 2nd Embodiment

[First Embodiment]
An air conditioning system 100 according to a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the air conditioning system 100 includes a pair of humidity control elements E (E1, E2), a pair of humidity control elements E, and an air supply side element Ea as main equipment configurations. Dampers V1 to V10 as switching mechanisms V that are alternately switched to the reproduction side element Eb, and a heating unit 21 that heats the air passing therethrough are provided.

  The state (first air conditioning state) of the air conditioning system 100 shown in FIG. 1 is a supply side element that dehumidifies the outdoor air OA that supplies the first humidity control element E1 of the pair of humidity control elements E to the indoor space. Ea, and the second humidity control element E2 is switched to the regeneration side element Eb that desorbs moisture adsorbed by dehumidification of the outdoor air OA. The state of the air conditioning system 100 shown in FIG. 2 (second air conditioning state) is a regeneration side element that desorbs moisture adsorbed by dehumidification of the outdoor air OA on the first humidity control element E1 of the pair of humidity control elements E. Eb, and the second humidity control element E2 is switched to the air supply side element Ea that dehumidifies the outdoor air OA supplied to the indoor space.

  In the first air conditioning state and the second air conditioning state, when the humidity control element E is switched to the air supply side element Ea, the humidity control air WA as the outdoor air OA supplied to the indoor space to the humidity control unit W Adsorbed by adsorbing moisture contained in the conditioning air WA while allowing the cooling air CA to pass through the cooling unit C and adsorbing moisture in the conditioning air WA in the humidity conditioning unit W Humidity adjustment air WA from which moisture has been removed by passing through the humidity adjustment section W of the air supply side element Ea in a state of absorbing heat is supplied to the indoor space. On the other hand, when switching to the regeneration side element Eb, the regeneration air R is passed through the humidity control section W, and moisture is desorbed from the humidity control section W into the regeneration air R and discharged to the outdoor space.

FIG. 3 shows a perspective view of the humidity control element E, and FIG. 4 shows an exploded perspective view of the humidity control element E.
As shown in FIGS. 3 and 4, each of the pair of humidity control elements E includes a plurality of flat plate members 1 formed in a substantially hexagonal shape, and a cooling unit C or a humidity control device between the flat plate members 1. The portions W are stacked in a state of forming the portion W, and the cooling portions C and the humidity control portions W are alternately arranged in the stacking direction of the flat plate member 1. Side wall plates 2 that connect the outer peripheral edge portions of the flat plate members 1 are provided on the outer peripheral edge portions of the plurality of flat plate members 1. In the present embodiment, a case where the three cooling portions C and the two humidity control portions W are formed by six flat plate members 1 will be described. However, in a practical level, 100 or more flat plate members 1 are used. It is assumed that 50 layers or more of the cooling part C and the humidity control part W are formed respectively.

Based on FIGS. 3-5, the humidity control element E is demonstrated concretely. FIG. 5 is an enlarged cross-sectional view of the humidity control element.
As shown in FIGS. 3 and 4, the humidity control section W has an inlet side inflow region 8 and a flow channel at both ends in the longitudinal direction of the hexagonal flat plate member 1 in a top view of the humidity control element E. An outflow region 10 on the outlet side is provided, and a guide portion 9 is provided between the inflow region 8 and the outflow region 10. Further, the cooling unit C is provided with an inflow region 11 on the inlet side and an outflow region 13 on the outlet side at both ends in the longitudinal direction of the hexagonal flat plate member 1 when the humidity control element E is viewed from above. The guiding portion 12 is provided between the inflow region 11 and the outflow region 13.

  The induction part 9 of the humidity control part W is provided with a first induction member 3 for inducing the humidity adjustment air WA, and the induction part 12 of the cooling part C is provided with a second induction member 4 for inducing the cooling air CA. Is provided. The first guiding member 3 and the second guiding member 4 are constituted by corrugated plate members having the same dimensions as the guiding portions 9 and 12 in a top view, and the inflow regions 8 and 11 of the humidity control unit W and the cooling unit C. To the outflow regions 10 and 13 are arranged in the guide portions 9 and 12 so that the cross-sectional view in the direction orthogonal to the direction toward the outflow regions 10 and 13 has a wave shape.

  In addition, a humidity control unit inlet Win through which air flows into the side surface portion of the humidity control unit W on the inflow region 8 side is provided, and a humidity control unit outlet Wout through which air flows out to the side surface of the humidity control unit W on the outflow region 10 side Is provided. On the other hand, a cooling portion inlet Cin through which air flows is provided in the side surface portion on the inflow region 11 side of the cooling portion C, and a cooling portion outlet Cout through which air flows out is provided on the side surface portion on the outflow region 13 side of the cooling portion C. Yes.

The first guide member 3 and the second guide member 4 are configured so that the flow direction of the humidity control air WA in the humidity control section W and the flow direction of the cooling air CA in the cooling section C are opposite to each other. Heat exchange is performed between the humidity control section W and the cooling section C in a state where the humidity control air WA and the cooling air CA are opposed to each other via the flat plate member 1 and are arranged in the induction portion 12. Can do.
Further, as shown in FIG. 5, the first guide member 3 provided in the humidity control unit W is configured by a first corrugated plate member 5 a and a hygroscopic agent 6 to be described later, and is provided in the cooling unit C. The guide member 4 includes a second corrugated plate member 5b and a moisture absorbent 6 described later.

  The flat plate member 1, the side wall plate 2, the first corrugated plate member 5a, and the second corrugated plate member 5b are made of, for example, a resin such as polypropylene (PP), polyethylene (PE), or polyethylene terephthalate (PET). It consists of a thin plate with a thickness of about a micron. In addition, the flat plate member 1 and the side wall plate 2 are manufactured using materials such as paper (processed so that moisture contained in the air does not permeate), metal (for example, aluminum), glass, ceramic, and the like. Can do. Moreover, about the 1st corrugated member 5a and the 2nd corrugated member 5b, it can produce using materials, such as paper, a metal (for example, aluminum etc.), glass, a ceramic, for example. In this embodiment, polyethylene terephthalate is used as the flat plate member 1, the corrugated plate member 5, and the side wall plate 2.

  Further, as shown in FIG. 5, the first surface 1 a facing the humidity control portion W of the flat plate member 1 absorbs and desorbs moisture contained in the humidity control air WA that passes through the humidity control portion W. Is held. Further, the hygroscopic agent 6 is also held on the surface of the first corrugated member 5a, that is, the upper surface side and the lower surface side of the first corrugated member 5a. As described above, since a large amount of the hygroscopic agent 6 can be held on both surfaces of the flat plate member 1 and the corrugated plate member 5 having a large surface area, the moisture adsorption performance in the humidity control section W can be increased.

  Various kinds of hygroscopic agents 6 can be used. For example, a material mainly composed of a polyacrylic acid-based resin (such as sodium polyacrylate having a crosslinked structure) can be used. Further, the binder of the flat plate member 1 and the hygroscopic agent 6 is close in polarity to the material constituting the hygroscopic agent 6 and can withstand the volume change and heat cycle of the hygroscopic agent 6 (that is, the function as the binder can be maintained). ) A flexible material can be used. For example, when a polyacrylic acid-based material as described above is used as the hygroscopic agent 6, a material such as an aqueous urethane resin, polyvinyl acetate, or ethylene-vinyl acetate copolymer can be used as the binder. Or what mixed the material mentioned above can also be utilized as a binder. In this embodiment, sodium polyacrylate is used as the hygroscopic agent 6 and an aqueous urethane resin is used as the binder.

When the hygroscopic agent 6 is held on the flat plate member 1 and the corrugated plate member 5 (first corrugated plate member 5a) by using a binder, the flat plate member 1 is used in order to improve the adhesion of these three members. The corrugated plate member 5 (first corrugated plate member 5a) is preferably a resin material having a polarity close to that of the binder or the hygroscopic agent 6 and having heat resistance. Therefore, in this embodiment, as described above, polyethylene terephthalate is used as the flat plate member 1, the corrugated plate member 5, and the side wall plate 2.
Then, by applying a mixed liquid containing sodium polyacrylate and a binder made of a material such as a water-based urethane resin to the first surface 1a and the surface of the first corrugated plate member 5a, the first sodium acrylate is added. It can hold | maintain on the surface of the surface 1a and the 1st corrugated plate member 5a.

  On the other hand, a metal film 7 is formed on the second surface 1 b facing the cooling part C of the plurality of flat plate members 1. The metal film 7 is made of a material such as aluminum and has a thickness of about several microns, and is formed on the first surface 1a by vapor deposition. Thereby, the heat transfer area between the cooling air CA and the flat plate member 1 is expanded by the metal film 7 due to the good thermal conductivity of the metal film 7 formed on the first surface 1a. Heat transfer between the flat plate member 1 and the flat plate member 1 can be promoted. Thereby, the heat exchange efficiency between the cooling unit C and the humidity control unit W is improved. Here, when the flat plate member 1 is made of resin, paper (processed so that moisture contained in the air does not permeate), glass, and ceramic as in the present embodiment, the first is as described above. By forming the metal film 7 such as aluminum on the surface 1a, the heat exchange efficiency between the cooling part C and the humidity control part W can be improved. Further, when the flat plate member 1 is made of metal (for example, aluminum), the metal film 7 is formed on the first surface 1a using a metal having higher thermal conductivity than the metal constituting the flat plate member 1 as a material. By forming, the heat exchange efficiency between the cooling part C and the humidity control part W can be improved.

Next, the passage configuration of the air conditioning system 100 according to the present embodiment will be described.
The state of the air conditioning system 100 shown in FIG. 1 is that the air supply side element Ea that dehumidifies the outdoor air OA supplied to the indoor space by the first humidity adjustment element E1 of the pair of humidity adjustment elements E is applied to the second humidity adjustment element. This is the first air conditioning state in which the element E2 is switched to the regeneration side element Eb that desorbs moisture adsorbed by dehumidification of the outdoor air OA.

  The first air supply passage L1a, the first exhaust passage L2a, and the first outdoor air circulation passage L3a will be described with reference to FIG. In FIG. 1, the first air supply passage L1a is indicated by a two-dot chain line, the first exhaust passage L2a is indicated by a one-dot chain line, and the first outdoor air circulation passage L3a is indicated by a broken line.

  The first air supply passage L1a (an example of the air supply passage) receives outdoor air OA taken from the outdoor space when the first humidity control element E1 is switched to the air supply side element Ea. This is a passage that passes through the humidity control section W of E1 and supplies it to the indoor space.

  Humidity adjustment air WA as outdoor air OA flowing through the first air supply passage L1a flows in from the outdoor air supply port 30 on the upstream side, and passes through the humidity adjustment portion W of the first humidity adjustment element E1. Then, it flows out of the indoor air supply port 33 on the downstream side and is supplied to the indoor space. Specifically, the outdoor air OA flowing from the outdoor air supply port 30 moves from the upstream side toward the downstream side, the first branch portion P1, the second branch portion P2, the first junction portion R1, the first humidity control element. It is configured to sequentially pass through the humidity control section W, the third branch section P3, and the second junction section R2 of E1, and flow out from the indoor air supply port 33 and be supplied to the indoor space.

  The first air supply passage L1a is provided with an air supply fan F1 that sucks outdoor air OA into the passage portion from the outdoor air supply port 30 to the first branch portion P1, and is downstream of the second branch portion P2. A damper V1 for opening and closing the first air supply passage L1a is provided on the upstream side of the first merging portion R1, and the first air supply passage L1a is on the downstream side of the third branch portion P3 and on the upstream side of the second merging portion R2. A damper V2 is provided for opening and closing.

  Further, in the first air supply passage L1a, the humidity control section W of the first humidity control element E1 is downstream of the humidity control section outlet Wout of the first humidity control element E1 and upstream of the third branching section P3. A first temperature detection unit 35A that detects the temperature of the air that has passed through and a first humidity detection unit 35B that detects the humidity of the air that has passed through the humidity control unit W of the first humidity control element E1 are provided. The first humidity detector 35B detects absolute humidity.

  Further, the first exhaust passage L2a (an example of the exhaust passage) is configured such that the indoor air RA taken out from the indoor space is used as the cooling air CA when the first humidity control element E1 is switched to the air supply side element Ea. This is a passage through which the cooling unit C of the first humidity control element E1 passes and exhausts to the outdoor space.

  The cooling air CA flowing through the first exhaust passage L2a is the indoor air RA, flows in from the indoor exhaust port 31 on the upstream side, passes through the cooling part C of the first humidity control element E1, and on the downstream side. The air is exhausted from a certain outdoor exhaust port 32 to the outdoor space. Specifically, the indoor air RA flowing in from the indoor exhaust port 31 sequentially passes through the fourth branch part P4, the cooling part C of the first humidity control element E1, and the third merge part R3 from the upstream side toward the downstream side. It is configured to pass through and be discharged from the outdoor exhaust port 32 to the outdoor space.

  The first exhaust passage L2a is provided with a damper V3 that opens and closes the first exhaust passage L2a downstream of the fourth branch portion P4 and upstream of the cooling portion inlet Cin of the first humidity control element E1. An exhaust fan F2 that discharges air to the outdoor space is provided on the downstream side of the junction R3 and on the upstream side of the outdoor exhaust port 32.

  The first outdoor air circulation passage L3a (an example of the outdoor air circulation passage) is configured to regenerate outdoor air OA taken from the outdoor space when the second humidity control element E2 is switched to the regeneration side element Eb. R is a passage that passes through the humidity control portion W of the second humidity control element E2 and discharges it to the outdoor space.

  The regeneration air R flowing through the first outdoor air circulation passage L3a is taken as outdoor air OA, flows in from the outdoor air supply port 30 on the upstream side, passes through the heating unit 21, and then flows through the second humidity control element E2. It passes through the humidity control section W and is discharged to the outdoor space from the outdoor exhaust port 32 on the downstream side. Specifically, the outdoor air OA flowing from the outdoor air supply port 30 flows from the upstream side toward the downstream side, the first branch part P1, the heating part 21, the sixth branch part P6, the fourth junction part R4, The humidity control unit W, the fifth branching unit P5, the fifth junction unit R5, and the third junction unit R3 of the second humidity control element E2 are sequentially passed through and discharged from the outdoor exhaust port 32 to the outdoor space. Has been.

  The first outdoor air circulation passage L3a is provided with a heating unit 21 on the downstream side of the first branch part P1 and on the upstream side of the sixth branch part P6, and on the downstream side of the sixth branch part P6 and on the fourth side. A damper V4 that opens and closes the first outdoor air circulation passage L3a is provided on the upstream side of the junction R4. Further, a damper V5 that opens and closes the first outdoor air circulation passage L3a is provided downstream of the fifth branch portion P5 and upstream of the fifth junction R5. Further, the above-described air supply fan F1 and exhaust fan F2 are provided.

  Further, in the first outdoor air circulation passage L3a, the humidity control part of the second humidity control element E2 is located downstream of the humidity control part outlet Wout of the second humidity control element E2 and upstream of the fifth branch part P5. A second temperature detection unit 34A that detects the temperature of the air that has passed through W and a second humidity detection unit 34B that detects the humidity of the air that has passed through the humidity control unit W of the second humidity control element E2 are provided. . The second humidity detector 34B detects absolute humidity.

  The heating unit 21 heats the regeneration air R taken from the outdoor space by heat exchange with the heat medium flowing through the heat medium flow passage 20, and the regeneration air R that passes through the heating unit 21. The control unit S is configured to change the flow rate of the heat medium flowing through the heat medium flow passage 20 so that the temperature of the heat medium becomes a preset temperature.

  Specifically, hot water supplied from a boiler (not shown), hot water discharged from a cogeneration system (not shown), or the like flows through the heat medium flow passage 20 as a heat medium. A heating medium flow rate adjustment valve (not shown) provided at 20 is controlled by the control unit S so that the flow rate of the heating medium flow passage 20 can be adjusted. Further, the operations of the dampers V1 to V10, the supply fan F1, and the exhaust fan F2 are configured to be controlled by the control unit S.

  The state of the air conditioning system 100 shown in FIG. 2 is such that the first humidity control element E1 of the pair of humidity control elements E is in a second adjustment mode to the regeneration side element Eb that desorbs moisture adsorbed by dehumidification of the outdoor air OA. The humidity element E2 is in the second air conditioning state switched to the air supply side element Ea for dehumidifying the outdoor air OA supplied to the indoor space.

  Based on FIG. 2, the second air supply passage L1b, the second exhaust passage L2b, and the second outdoor air circulation passage L3b will be described. In FIG. 2, the second air supply passage L1b is indicated by a two-dot chain line, the second exhaust passage L2b is indicated by a one-dot chain line, and the second outdoor air circulation passage L3b is indicated by a broken line.

  The second air supply passage L1b (an example of the air supply passage) receives the outdoor air OA taken from the outdoor space when the second humidity control element E2 is switched to the air supply side element Ea. This is a passage that passes through the humidity control section W of E2 and supplies it to the indoor space.

  Humidity adjustment air WA as outdoor air OA flowing through the second air supply passage L1b flows in from the outdoor air supply port 30 on the upstream side and passes through the humidity adjustment portion W of the second humidity adjustment element E2. Then, it flows out of the indoor air supply port 33 on the downstream side and is supplied to the indoor space. Specifically, the outdoor air OA flowing from the outdoor air supply port 30 moves from the upstream side toward the downstream side, the first branch portion P1, the second branch portion P2, the fourth junction portion R4, the second humidity control element. It is configured to sequentially pass through the humidity control section W, the fifth branching section P5, and the second joining section R2 of E2, and flow out from the indoor air supply port 33 and be supplied to the indoor space.

  An air supply fan F1 is provided in the second air supply passage L1b, a damper V6 is provided downstream of the second branch portion P2 and upstream of the fourth junction portion R4, and downstream of the fifth branch portion P5. The damper V7 is provided on the upstream side of the second merging portion R2. Further, the above-described second temperature detection unit 34A and second humidity detection unit 34B are provided.

  Further, the second exhaust passage L2b (an example of the exhaust passage) uses the indoor air RA taken out from the indoor space as the cooling air CA when the second humidity control element E2 is switched to the air supply side element Ea. This is a passage through which the cooling unit C of the second humidity control element E2 passes and exhausts to the outdoor space.

  The cooling air CA flowing through the second exhaust passage L2b is taken as indoor air RA, flows in from the indoor exhaust port 31 on the upstream side, passes through the cooling part C of the second humidity control element E2, and reaches the downstream side. The air is exhausted from a certain outdoor exhaust port 32 to the outdoor space. Specifically, the indoor air RA flows in from the indoor exhaust port 31, and from the upstream side toward the downstream side, the fourth branch part P4, the cooling part C of the second humidity control element E2, the fifth merging part R5, and the second The three merging portions R3 are sequentially passed through and discharged from the outdoor exhaust port 32 to the outdoor space.

  The second exhaust passage L2b is provided with an exhaust fan F2, and is a damper that opens and closes the second exhaust passage L2b on the downstream side of the fourth branch portion P4 and upstream of the cooling portion inlet Cin of the second humidity control element E2. V8 is provided.

  Further, the second outdoor air circulation passage L3b (an example of the outdoor air circulation passage) is configured to regenerate outdoor air OA taken from the outdoor space when the first humidity control element E1 is switched to the regeneration side element Eb. R is a passage that passes through the humidity control portion W of the first humidity control element E1 and discharges it to the outdoor space.

  The regeneration air R flowing through the second outdoor air circulation passage L3b is taken as outdoor air OA, flows from the outdoor air supply port 30 on the upstream side, passes through the heating unit 21, and then passes through the heating unit 21. It passes through the humidity control section W and is discharged to the outdoor space from the outdoor exhaust port 32 on the downstream side. Specifically, the outdoor air OA flowing from the outdoor air supply port 30 flows from the upstream side toward the downstream side, the first branch part P1, the heating part 21, the sixth branch part P6, the first junction part R1, the first The humidity control part W, the third branch part P3, and the third junction part R3 of the first humidity control element E1 are sequentially passed through and discharged from the outdoor exhaust port 32 to the outdoor space.

  In the second outdoor air circulation passage L3b, the above-described air supply fan F1 and exhaust fan F2 are provided, and the heating unit 21 is provided on the downstream side of the first branch part P1 and on the upstream side of the sixth branch part P6. A damper V9 is provided downstream of the sixth branch part P6 and upstream of the first junction R1. A damper V10 is provided on the downstream side of the third branch portion P3 and on the upstream side of the third junction portion R3. Furthermore, the above-described first temperature detection unit 35A and first humidity detection unit 35B are provided in the second outdoor air circulation passage L3b.

Next, switching processing for switching each of the pair of humidity control elements E to the supply side element Ea and the regeneration side element Eb in the air conditioning system 100 according to the present embodiment will be described.
In the air conditioning system 100 according to the present embodiment, the outdoor air OA passes through the humidity control section W as the humidity control air WA through one humidity control element E of the pair of humidity control elements E, and the cooling air A pair of humidity control elements E in a state where CA is an air supply side element Ea that passes through the cooling unit C and the other humidity control element E is a regeneration side element Eb through which the regeneration air R passes through the humidity control unit W. Is switched by switching the dampers V1 to V10 as the switching mechanism V by the control unit S so that the switching process is switched between the air supply side element Ea and the regeneration side element Eb.

  That is, in the air conditioning system 100, as shown in FIG. 1, the first humidity control element E1 is used as the humidity control air WA by using the outdoor air OA flowing through the first air supply passage L1a. The indoor air RA that passes through the wet portion W and flows through the first exhaust passage L2a is used as the air supply side element Ea that passes through the cooling portion C of the first humidity control element E1 as the cooling air CA. A first air-conditioning state in which the humidity element E2 is the regeneration-side element Eb in which the outdoor air OA flowing through the first outdoor air circulation passage L3a is used as the regeneration air R and passes through the humidity control section W of the second humidity control element E2. 2, the outdoor air OA flowing through the second air supply passage L1b through the second humidity control element E2 passes through the humidity control section W of the second humidity control element E2 as humidity control air WA. In addition, the indoor air RA flowing through the second exhaust passage L2b is used as the cooling air CA as the second humidity control. The air supply side element Ea that passes through the cooling part C of the child E2 is used, the first humidity control element E1 is used as the regeneration air R, and the first humidity control element E1 is the outdoor air OA that flows through the second outdoor air circulation passage L3b. Is switched to the second air-conditioning state where the regeneration side element Eb passes through the humidity control section W.

  And the control part S implements the switching process which switches a pair of humidity control elements E to a 1st air conditioning state and a 2nd air conditioning state as mentioned above by controlling the open / close state of dampers V1-V10. It is configured. In FIGS. 1 and 2, a passage portion through which air flows is shown by a thick line, and a passage portion through which air does not flow is shown by a thin line.

  The control of the opening / closing states of the dampers V <b> 1 to V <b> 10 by the control unit S will be described with respect to the first air conditioning state shown in FIG. 1. The damper provided in the passage in which the air indicated by the thick line flows. That is, the dampers V1 and V2 provided in the first air supply passage L1a, the damper V3 provided in the first exhaust passage L2a, and the dampers V4 and V5 provided in the first outdoor air circulation passage L3a are controlled to be opened. The dampers V6 to V10 provided in the non-flow passage where the air indicated by the thin line is not flowing are controlled to be closed. In FIGS. 1 and 2, the damper in the closed state is shown with a black circle, and the damper in the open state is shown with a white circle.

  Further, regarding the control of the open / closed state of the dampers V1 to V10 by the control unit S, the second air conditioning state shown in FIG. 2 will be described. The control unit S is provided in the passage in which the air indicated by the thick line flows. The dampers V6 and V7 provided in the second air supply passage L1b, the damper V8 provided in the second exhaust passage L2b, and the dampers V9 and V10 provided in the second outdoor air circulation passage L3b. The dampers V <b> 1 to V <b> 5 provided in the passages in the non-flowing state where the air indicated by the thin lines is not flowing are controlled to be closed.

Next, the flow rate adjustment of the air flowing through each passage will be described.
In adjusting the flow rate of the air flowing through each passage, the target flow rate (flow rate per unit time) of the air flowing through each passage is determined, and the supply fan F1 and the exhaust fan F2 are set so as to have the determined target flow rates. This is done by adjusting the air blowing capacity and the openings of the dampers V1 to V10.
For example, in the first air conditioning state, the target flow rate of the outdoor air OA supplied to the indoor space by the first air supply passage L1a, the target flow rate of the indoor air RA taken out from the indoor space by the first exhaust passage L2a, and the first outdoor A target flow rate of the outdoor air OA that passes through the humidity control portion W of the regeneration side element Eb is determined by the air circulation passage L3a.

  The dampers provided in the passage through which air does not flow, that is, the dampers V6, V7, second provided in the second air supply passage L1b so that the flow rate of the air flowing through each passage becomes the target flow rate. The damper V8 provided in the exhaust passage L2b and the dampers V9, V10 provided in the second outdoor air circulation passage L3b are closed, and air is passed while adjusting the fan rotation speed of the supply fan F1 and the exhaust fan F2. Dampers provided in the flow passage, ie, dampers V1 and V2 provided in the first air supply passage L1a, damper V3 provided in the first exhaust passage L2a, and the first outdoor air circulation The opening degree of dampers V4 and V5 provided in the passage L3a is adjusted.

  Note that the target flow rates of the first supply passage L1a and the first exhaust passage L2a are determined based on, for example, the indoor ventilation amount set by the user. Further, the target flow rate of the first outdoor air circulation passage L3a is set to a predetermined flow rate that is required in order to desorb moisture from the humidity control portion W of the regeneration side element Eb as the regeneration air R. .

  Further, in the present embodiment, in order to ventilate with the indoor pressure kept constant, the flow rate of the outdoor air OA supplied to the indoor space by the first air supply passage L1a and the indoor space by the first exhaust passage L2a. The target flow rates of the first air supply passage L1a and the first exhaust passage L2a are determined so that the flow rate of the indoor air RA taken out from the exhaust air becomes equal.

  As described above, for example, in the first air conditioning state, the flow rates of the first supply passage L1a, the first exhaust passage L2a, and the first outdoor air circulation passage L3a are determined target flow rates. The control unit S is configured so that the air supply capacity of the supply fan F1, the exhaust fan F2, the dampers V1 and V2 provided in the first supply passage L1a, the damper V2 provided in the first exhaust passage L2a, the first It is adjusted by adjusting the opening degree of the dampers V4 and V5 provided in the one outdoor air circulation passage L3a.

  Next, the control unit S switches from the first air conditioning state to the second air conditioning state at the time when the switching process for switching each of the pair of humidity control elements E to the air supply side element Ea and the regeneration side element Eb is performed. Switching will be described as an example.

  In the first air conditioning state, the control unit S passes through the humidity control unit W of the first humidity control element E1 functioning as the air supply side element Ea, dehumidifies, and supplies the humidity control air WA (supply) to the indoor space The temperature and humidity of the air SA) are detected by the first temperature detecting unit 35A and the first humidity detecting unit 35B provided in the first air supply passage L1a, and the second from the first air conditioning state based on the detection result. It is comprised so that the switching process to an air-conditioning state may be implemented. Note that the humidity detected by the first humidity detector 35B is absolute humidity.

  When the first humidity control element E1 functioning as the air supply side element Ea in the first air-conditioning state has adsorbed the moisture of the humidity adjustment air WA, and the moisture cannot be properly adsorbed, In the air-conditioning state, the element functioning as the air supply side element Ea is switched to the second humidity control element E2, and the element functioning as the regeneration side element Eb is switched to the first humidity control element E1. Thereby, the moisture of the humidity adjustment air WA can be appropriately adsorbed by the second humidity adjustment element E2, and the moisture adsorbed by the first humidity adjustment element E1 is desorbed from the first humidity adjustment element E1. Can do.

  Further, in the first air-conditioning state, the humidity adjusting air WA supplied to the room by generating heat of adsorption by adsorbing moisture of the humidity adjusting air WA by the humidity adjusting portion W of the first humidity adjusting element E1. However, the temperature of the humidity control air WA that has passed through the humidity control section W of the first humidity control element E1 is detected, and the switching process is performed based on the detection result. Therefore, by performing the switching process when the temperature of the humidity control air WA rises, it is possible to prevent the high-temperature humidity control air WA from being supplied indoors.

FIG. 6 shows the temperature detection result of the humidity adjustment air WA (supply air SA) detected by the first temperature detection unit 35A and the humidity adjustment detected by the first humidity detection unit 35B in the first air conditioning state. The humidity detection result of air WA (supply air SA) is shown. In FIG. 6, when the switching process is performed, the switching process start time T0 is set, and the post-switching adsorption time Ta, which is the elapsed time from the switching process, is shown on the horizontal axis. The humidity (absolute humidity) of the working air WA is shown on the vertical axis. In FIG. 6, outdoor humidity H _OA indicates the absolute humidity of outdoor air OA in the outdoor space, and outdoor temperature TE _OA indicates the temperature of outdoor air OA in the outdoor space.

  The humidity of the humidity adjustment air WA shown in FIG. 6 is detected by the first humidity detection unit 35B because the moisture adsorption performance of the humidity adjustment unit W of the supply side element Ea is high immediately after the switching process. The humidity of the humidity control air WA is lowered. Thereafter, as the post-switching adsorption time Ta elapses, the moisture adsorption performance of the humidity control section W of the air supply side element Ea decreases, so the humidity of the humidity control air WA detected by the first humidity detection section 35B. Will rise.

Further, the temperature of the humidity control air WA shown in FIG. 6 will be described. The humidity control section W of the air supply side element Ea is heated by the adsorption heat due to moisture adsorption to the humidity control section W and is always cooled by the cooling section C, and thus passes through the humidity control section W by this cooling and heating. The temperature of the humidity adjustment air WA will change.
That is, at the start time T0 of the switching process, since it is cooled by the cooling unit C, the temperature is lower than the outdoor temperature TE _OA which is the temperature of the outdoor air OA. And after the start of the switching process, since the moisture adsorption performance of the humidity adjustment portion W of the supply side element Ea is high, the amount of moisture adsorption to the humidity adjustment portion W of the supply side element Ea increases. The amount of heat of adsorption generated from the humidity control section W increases due to moisture adsorption, and the temperature of the humidity control air WA rises. Thereafter, when the adsorption time Ta after switching elapses, when the moisture adsorbed on the humidity control section W increases, the adsorption performance of the humidity control section W decreases, and the moisture newly adsorbed on the humidity control section W decreases. Therefore, the amount of heat generated by adsorption is reduced. As described above, since the humidity control portion W of the air supply side element Ea is always cooled by the cooling portion C through which the cooling air CA flows, the temperature of the humidity control air WA is higher than that of the outdoor air OA. Also decreases to a lower temperature.

  Then, as shown in FIG. 6, after the control unit S performs the switching process, the temperature of the humidity control air WA (supply air SA) detected by the first temperature detection unit 35A is used for dehumidification as the set temperature. When the temperature is equal to or higher than the set temperature TEa, or when the humidity of the humidity control air WA detected by the first humidity detector 35B is increased to be equal to or higher than the set absolute humidity Ha for dehumidification as the set humidity. It is configured to be implemented. That is, as will be described in detail below, either the time when the temperature of the humidity control air WA rises to become the dehumidification set temperature TEa or the time when the humidity rises to become the dehumidification set absolute humidity Ha or more The switching process is performed at the earlier time. It should be noted that the state of the humidity control unit W at the time when it becomes the dehumidification set temperature TEa or higher and the time when it becomes the dehumidification set absolute humidity Ha or higher is, for example, a state where sufficient moisture adsorption performance cannot be exhibited. This is a state where the amount of water adsorbed by the part W can be considered to have reached the upper limit.

  In this embodiment, the control unit S performs the post-switching adsorption time T1 when the temperature of the humidity adjustment air WA detected by the first temperature detection unit 35A is equal to or higher than the dehumidification set temperature TEa, or the first humidity. Since the switching process is performed at the earlier of the post-switching adsorption time T2 when the humidity of the humidity control air WA detected by the detection unit 35B is equal to or higher than the dehumidifying set absolute humidity Ha, the example shown in FIG. , The switching process is performed at the post-switching adsorption time T1 at which the temperature of the humidity control air WA is equal to or higher than the dehumidifying set temperature TEa.

Next, reproduction of the reproduction side element Eb will be described.
The control unit S is configured to perform a regeneration process in which the regeneration air R heated by the heating unit 21 is passed through the humidity control unit W of the regeneration-side element Eb. That is, in the first air conditioning state described above, the control unit S starts the flow of the heat medium in the heat medium flow passage 20 provided in the heating unit 21 and supplies the heat medium based on the target flow rate of the regeneration air R. The ventilation capacity of the air fan F1, the exhaust fan F2, the dampers V1, V2 provided in the first air supply passage L1a, the damper V3 provided in the first exhaust passage L2a, and the damper provided in the first outdoor air circulation passage L3a Adjusting the opening degree of V4 and V5, adjusting the flow rate of the regeneration air R flowing through the first outdoor air circulation passage L3a, and adjusting the humidity of the regeneration side element Eb connected to the first outdoor air circulation passage L3a A regeneration process for flowing through the section W is performed. In this regeneration process, the regeneration air R, which is the outdoor air OA heated to the set temperature, is passed through the humidity control section W of the regeneration side element Eb, and the moisture adsorbed on the humidity control section W of the regeneration side element Eb. Is a process of desorbing from the regeneration air R.
Note that the temperature of the regeneration air R is set to a set temperature by adjusting the flow rate of the heat medium in the heat medium flow passage 20 by the control unit S as described above.

  Further, in this regeneration process, the control unit S determines that the humidity of the regeneration air R that has passed through the humidity control unit W of the regeneration-side element Eb detected by the second humidity detection unit 34B is the regeneration set humidity Hs (the set humidity of the set humidity). (Example) When the number is less than, the stop process for stopping the reproduction process is performed.

FIG. 7 shows an example of the humidity detection result of the regeneration air R that has passed through the humidity control section W of the regeneration side element Eb detected by the second humidity detection section 34B in the first air conditioning state. In FIG. 7, the post-switching regeneration time Tb, which is the elapsed time from the switching process, is shown on the horizontal axis, and the temperature of the regeneration air R and the absolute humidity H of the regeneration air R are shown on the vertical axis. In FIG. 7, the outdoor humidity H _OA indicates the absolute humidity of the outdoor air OA in the outdoor space, and the outdoor temperature TE _OA indicates the temperature of the outdoor air OA in the outdoor space.

As shown in FIG. 7, the absolute humidity H is a value for reproduction detected by the second humidity detection unit 34B because the amount of moisture desorbed from the humidity control unit W of the reproduction-side element Eb is large immediately after the switching process. The absolute humidity of the air R increases. Thereafter, as the amount of water remaining in the humidity control section W of the regeneration side element Eb decreases with time, the amount of water desorbed from the humidity control section W by the regeneration air R decreases, so that the second humidity detection humidity of reproduction air R detected by the part 34B is, over time, gradually decreases toward the outdoor humidity H _OA before the outdoor air OA gradually heated.

  In the present embodiment, as described above, the control unit S performs the stop process at the post-switching regeneration time Tb in which the humidity of the humidity conditioning air WA detected by the second humidity detector 34B is less than the regeneration set humidity Hs. Therefore, in the example shown in FIG. 7, the switching process is performed at the reproduction time T4 after switching.

  The regeneration set humidity Hs is a humidity set with respect to the humidity of the regeneration air R after the moisture is desorbed from the humidity control portion W of the regeneration side element Eb. For example, the first humidity control element E1 Can be appropriately set based on the amount of moisture predicted to be adsorbed when used as the air supply side element Ea.

Incidentally, the reproduction set humidity Hs, is set to a value close to the outdoor humidity H _OA of the outdoor air OA, i.e., the moisture adsorbed to the humidity portion W is an attempt to desorption to a state that will not substantially remain, reproduction After the start of processing, as the residual moisture amount remaining in the humidity control section W decreases, the regeneration time for desorbing the unit moisture amount increases, and the energy used for regeneration of the regeneration side element Eb increases. Will be. Therefore, in the present embodiment, for example, when the residual moisture amount is about 30% of the total adsorbed moisture amount obtained in a state where moisture adsorption is saturated, the regeneration air R detected by the second humidity detection unit 34B. The humidity is determined in advance by experiments, the humidity is set as the reproduction set humidity Hs, and the stop process is performed when the reproduction set humidity Hs is detected.

  Further, in the first air conditioning state, the control unit S performs a stop process for stopping the regeneration process, and then switches the second humidity control element E2 that is the regeneration side element Eb to the supply side element Ea by the switching process. The regeneration process is stopped until the first humidity control element E1 that has been switched from the supply side element Ea to the regeneration side element Eb by the switching process is started. . When the stop process is performed in the first air conditioning state, the regeneration process is performed when the switching process is performed and the first air conditioning state is switched to the second air conditioning state without starting the regeneration process in the first air conditioning state. Start.

  That is, in the present embodiment, in the stop process performed by the control unit S, for example, in addition to stopping the flow of the heat medium in the heat medium flow passage 20 provided in the heating unit 21, the first outdoor air Since the dampers V4 and V5 provided in the circulation passage L3a are closed, the heat medium flow passage provided in the heating unit 21 by the control unit S until the switching process is performed after the stop process is performed. In addition to stopping the flow of the 20 heat medium, a state in which the dampers V4 and V5 provided in the first outdoor air circulation passage L3a are closed is maintained.

  Then, when the switching process for switching from the first air conditioning state to the second air conditioning state is performed by the control unit S, based on the target flow rate of the regeneration air R, as described above, the supply fan F1 and the exhaust fan F2 The blowing capacity and the open / closed states of the dampers V1 to V10 are controlled, and the regeneration air R flows through the humidity control section W of the first humidity control element E1. Further, when the control unit S performs a switching process for switching from the first air-conditioning state to the second air-conditioning state in a state where the flow of the heat medium in the heat medium flow passage 20 provided in the heating unit 21 is stopped. The heat medium flow path 20 provided in the heating unit 21 is configured to start the flow of the heat medium. Thus, the regeneration process is started for the first humidity control element E1 that is switched from the supply-side element Ea to the regeneration-side element Eb.

[Second Embodiment]
Next, a second embodiment will be described. In the second embodiment, the first temperature detection unit 35A and the second temperature detecting the temperature of the regeneration air R that has passed through the humidity control unit W of the regeneration side element Eb. When the control unit S includes the detection unit 34A and the temperature of the regeneration air R detected by the first temperature detection unit 35A and the second temperature detection unit 34A becomes equal to or higher than the regeneration set temperature TEs, or the first The first implementation is that a stop process is performed when the humidity of the regeneration air R detected by the humidity detector 35B and the second humidity detector 34B becomes less than the regeneration setting humidity Hs. Since other configurations are the same as those of the first embodiment, only the portions different from the first embodiment will be described, and the same configurations as those of the first embodiment will be described in detail. Omitted.

  In the second embodiment, for example, when the air conditioning system 100 is in the first air conditioning state as shown in FIG. 1, the temperature of the regeneration air R detected by the second temperature detector 34A is the regeneration air temperature. When the temperature becomes equal to or higher than the set temperature TEs (an example of the set temperature), or when the humidity of the regeneration air R detected by the second humidity detection unit 34B becomes less than the regeneration set humidity Hs, the control unit S The stop process is implemented.

  In the present embodiment, the regeneration process can be stopped at an appropriate time based on the temperature detected by the second temperature detector 34A or the first temperature detector 35A. That is, the moisture adsorbed by the humidity control portion W of the regeneration-side element Eb is desorbed to the regeneration air R as water vapor. At this time, the same amount of heat as the increase in the latent heat of the water vapor is deprived from the regeneration air R. Will be. That is, the moisture of the humidity control portion W of the regeneration side element Eb is desorbed to the regeneration air R due to equal enthalpy, and the temperature of the regeneration air R decreases, so that it passes through the humidity control portion W of the regeneration side element Eb. By detecting the temperature of the regenerated air R, the amount of moisture remaining in the regeneration side element Eb can be estimated. Therefore, the regeneration process can be stopped at an appropriate time by appropriately setting the regeneration set temperature TEs.

FIG. 8 shows the temperature detection result of the regeneration air R that has passed through the humidity control section W of the regeneration side element Eb detected by the second temperature detection section 34A in the first air conditioning state, and the second humidity detection section 34B. The example of the humidity detection result of the reproduction | regeneration air R which passed the humidity control part W of the detected reproduction | regeneration side element Eb is shown. In FIG. 8, the post-switching regeneration time Tb, which is the elapsed time from the start time T0 of the regeneration process, which is the switching process, is shown on the horizontal axis, and the temperature of the regeneration air R and the absolute value of the regeneration air R are shown. Humidity H is shown on the vertical axis. The outdoor humidity H _OA indicates the absolute humidity of the outdoor air OA in the outdoor space, and the outdoor temperature TE _OA indicates the temperature of the outdoor air OA in the outdoor space.

The temperature change of the regeneration air R during the regeneration process will be described. The outdoor air OA heated by the heating unit 21 is passed through the humidity control unit W of the regeneration side element Eb as the regeneration air R. During implementation, the temperature of the regeneration air R is higher than the outdoor temperature TE _OA which is the temperature of the outdoor air. The regeneration air R is heated by the heating unit 21 so that the temperature at the outlet of the heating unit 21 becomes the outlet temperature TEh, as in the first embodiment.

Specifically, immediately after the start of the regeneration process, the amount of moisture desorbed from the humidity control portion W of the regeneration-side element Eb is large, so the temperature of the regeneration air R is low. That is, since much moisture is adsorbed to the humidity control unit W, more moisture evaporates in the regeneration air R. As a result, large latent heat of vaporization is removed from the regeneration air R, and the temperature of the regeneration air R is significantly lower than the outlet temperature TEh. Thereafter, as the amount of water remaining in the humidity control section W decreases with time, the amount of water evaporated from the humidity control section W to the regeneration air R decreases, so that the latent heat of evaporation taken away from the regeneration air R is reduced. Less. As a result, the temperature of the regeneration air R gradually increases toward the outlet temperature TEh.
The change in the absolute humidity H of the regeneration air R during the regeneration process is as described in the first embodiment and is the same as the absolute humidity H of the regeneration air R shown in FIG.

  In the present embodiment, as described above, the control unit S performs the post-switching regeneration time T3 in which the temperature of the humidity control air WA detected by the second temperature detection unit 34A rises and becomes equal to or higher than the regeneration set temperature TEs. Or when the humidity of the humidity control air WA detected by the second humidity detection unit 34B decreases and becomes the post-switching regeneration time T4 when it becomes less than the regeneration setting humidity Hs, the switching process is performed. Therefore, the stop process is executed at the post-switching playback time T4, which is the earlier one of the post-switching playback time T3 and the post-switching playback time T4.

[Another embodiment]
(1) In the above embodiment, the absolute humidity is detected by the first humidity detector 35B. However, the present invention is not limited thereto, and the humidity detected by the first humidity detector 35B is set as the relative humidity. The absolute humidity may be obtained from the relative humidity detected at 35B and the temperature detected by the first temperature detector 35A. The relative humidity detected by the second humidity detector 34B is used as the relative humidity, and the absolute humidity is obtained from the relative humidity detected by the second humidity detector 34B and the temperature detected by the second temperature detector 34A. May be.

(2) In the above embodiment, the room air RA flowing through the first exhaust passage L2a and the second exhaust passage L2b as the exhaust passage is used as the cooling air CA and passes through the cooling portion C of the supply side element Ea. However, the present invention is not limited to this, and the outdoor air OA taken from the outdoor space may be used as the cooling air CA so as to pass through the cooling unit C of the air supply side element Ea.

(3) In the above-described embodiment, the cooling unit C and the humidity control unit W are formed by stacking the six flat plate members 1 in the humidity control device E. However, the humidity control device E is not limited thereto. In this case, the cooling unit C and the humidity control unit W may be formed by stacking five or less flat plate members 1, or the cooling unit C may be adjusted by stacking seven or more flat plate members 1. The wet part W may be formed.

(4) In the above embodiment, the dampers V1 to V10 as the switching mechanism V are provided at the predetermined positions shown in FIGS. 1 and 2 in the air supply passage, the exhaust passage, and the outdoor air circulation passage. The number of installations and installation positions can be changed as appropriate.

(5) In the above embodiment, the switching mechanism V for switching the pair of humidity control elements E to the supply side element Ea and the regeneration side element Eb is configured by the dampers V1 to V10. However, the switching mechanism V is not limited to this. is not. For example, the air supply passage, the exhaust passage, the outdoor air circulation passage and the pair of humidity control elements E are configured to be connectable so that the installation positions of the respective humidity control elements E can be interchanged with each other. The switching mechanism V may be configured by an element moving device that moves the.

(6) In the above embodiment, the target flow rate of the regeneration air R that passes through the humidity control portion W of the regeneration-side element Eb is set to a predetermined flow rate per unit time. You may comprise so that the target flow volume of the reproduction | regeneration air R which passes the humidity control part W of the side element Eb may be adjusted according to the dehumidification load with respect to the humidity control air WA in the humidity control part W. In this case, as the dehumidifying load for the humidity adjusting air WA, for example, the amount of water actually adsorbed to the humidity adjusting portion W of the humidity adjusting air WA is used as the dehumidifying load, or the humidity adjusting air WA The amount of water predicted to be adsorbed to the part W can be used as a dehumidifying load.

(7) In the above embodiment, the humidity of the regenerating air R detected when the residual moisture amount is about 30% of the total adsorbed moisture amount obtained when the moisture adsorption is saturated is obtained in advance. Is set to the regeneration set humidity Hs, and the stop process is performed when the regeneration set humidity Hs is detected. However, the present invention is not limited to this, and the residual moisture amount is about 10% of the total adsorbed moisture amount. Alternatively, the humidity of the regeneration air R detected at the time may be obtained in advance, and the humidity may be set as the regeneration setting humidity Hs.

(8) In the above embodiment, the humidity or temperature of the regeneration air R on the inlet side of the humidity control section W of the regeneration side element Eb is obtained, and the regeneration air R on the inlet side of the humidity control section W of the regeneration side element Eb is obtained. The reproduction setting temperature TEs and the reproduction setting humidity Hs can be set according to the humidity or temperature. Further, in this case, the humidity or temperature on the inlet side of the humidity control section W of the reproduction side element Eb is obtained every predetermined time, and the reproduction set temperature TEs or the reproduction set humidity is determined according to the obtained humidity or temperature. You may comprise so that Hs may be changed.

  The configuration disclosed in the above embodiment (including another embodiment, the same shall apply hereinafter) can be applied in combination with the configuration disclosed in the other embodiment, as long as no contradiction occurs. The embodiment disclosed in this specification is an exemplification, and the embodiment of the present invention is not limited to this. The embodiment can be appropriately modified without departing from the object of the present invention.

  As described above, it is possible to provide an air conditioning system capable of reducing the energy used for regeneration of the regeneration side element.

34A 2nd temperature detection part (temperature detection part)
34B 2nd humidity detection part (humidity detection part)
35A 1st temperature detection part (temperature detection part)
35B 1st humidity detection part (humidity detection part)
20 Heating unit 100 Air-conditioning system C Cooling unit CA Cooling air E Humidity control element Ea Supply side element Eb Regeneration side element Hs Regenerative set humidity (set humidity)
L1a First air supply passage (air supply passage)
L1b Second air supply passage (air supply passage)
L2a First exhaust passage (exhaust passage)
L2b Second exhaust passage (exhaust passage)
L3a First outdoor air circulation passage (outdoor air circulation passage)
L3b Second outdoor air circulation passage (outdoor air circulation passage)
OA outdoor air R regeneration air RA indoor air S control unit TEs regeneration set temperature (set temperature)
V switching mechanism W humidity control section WA humidity control air

Claims (3)

An air supply passage for supplying outdoor air taken from the outdoor space to the indoor space;
An exhaust passage for exhausting indoor air taken out from the indoor space to the outdoor space;
A humidity control unit that adsorbs or desorbs moisture in the passing humidity conditioning air, and a cooling unit that absorbs the heat of adsorption accompanying the moisture adsorption of the humidity control unit by the passing cooling air. A pair of humidity control elements, respectively,
Outdoor air flowing through the air supply passage through any one of the pair of humidity control elements passes through the humidity control section as the humidity control air, and the cooling air passes through the cooling section. In a state where the air supply side element that passes through and the other humidity control element is the regeneration side element through which the regeneration air passes through the humidity control unit, each of the pair of humidity control elements is replaced with the air supply side element. An air conditioning system including a switching mechanism for switching between an element and the regeneration-side element, and a control unit for controlling operation,
An outdoor air circulation passage for passing outdoor air taken in from an outdoor space as the regeneration air to the outdoor space through the humidity control portion of the regeneration-side element, and a heating unit provided in the outdoor air circulation passage; A humidity detection unit that detects the humidity of the regeneration air that has passed through the humidity control unit of the regeneration side element;
The control unit uses the switching mechanism to switch each of the pair of humidity control elements between the air supply side element and the regeneration side element, and the regeneration air heated by the heating unit. A regeneration process that passes through the humidity control unit of the regeneration-side element, and a stop process that stops the regeneration process when the humidity detected by the humidity detection unit is less than a set humidity during the regeneration process. An air conditioning system that is configured to carry out. An air supply passage for supplying outdoor air taken from the outdoor space to the indoor space;
An exhaust passage for exhausting indoor air taken out from the indoor space to the outdoor space;
A humidity control unit that adsorbs or desorbs moisture in the passing humidity conditioning air, and a cooling unit that absorbs the heat of adsorption accompanying the moisture adsorption of the humidity control unit by the passing cooling air. A pair of humidity control elements, respectively,
Outdoor air flowing through the air supply passage through any one of the pair of humidity control elements passes through the humidity control section as the humidity control air, and the cooling air passes through the cooling section. In a state where the air supply side element that passes through and the other humidity control element is the regeneration side element through which the regeneration air passes through the humidity control unit, each of the pair of humidity control elements is replaced with the air supply side element. An air conditioning system including a switching mechanism for switching between an element and the regeneration-side element, and a control unit for controlling operation,
An outdoor air circulation passage for passing outdoor air taken in from an outdoor space as the regeneration air to the outdoor space through the humidity control portion of the regeneration-side element, and a heating unit provided in the outdoor air circulation passage; A humidity detection unit that detects the humidity of the regeneration air that has passed through the humidity control unit of the regeneration side element; and a temperature detection unit that detects the temperature of the regeneration air that has passed through the humidity control unit of the regeneration side element; With
The control unit uses the switching mechanism to switch each of the pair of humidity control elements between the air supply side element and the regeneration side element, and the regeneration air heated by the heating unit. When the temperature of the regeneration air detected by the temperature detection unit is equal to or higher than a preset temperature during the regeneration process that is passed through the humidity control unit of the regeneration side element and the regeneration process, or the humidity An air conditioning system configured to perform the stop process when the humidity of the regeneration air detected by the detection unit becomes less than the set humidity.   The air conditioning system according to claim 1 or 2, wherein indoor air flowing through the exhaust passage passes through a cooling unit of the air supply side element as the cooling air.

Images