JP2017150755A - Air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning system capable of quickly adjusting temperature and humidity.SOLUTION: An air conditioning system 100 includes: humidity control elements D1, D2 that include a humidity control unit DS configured to adsorb moisture of passing adsorption air and desorb moisture to passing regeneration air, and a cooling unit CS configured to absorb adsorption heat with adsorption of the humidity control unit DS in passing cooling air, in such as manner that adsorption heat can be absorbed at the cooling unit CS when the humidity control unit DS adsorbs moisture; and a switching mechanism capable of switching between a circulation state of air to the humidity control element D1 on one side and a circulation state of air to the humidity control unit D2 on the other side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air supply passage for supplying air taken in from an outdoor space to the indoor space, an air supply means for flowing air taken from the outdoor space into the air supply passage, and air taken from the indoor space to the outdoor space An exhaust passage for exhausting to the exhaust passage, an exhaust means for passing the air taken out from the indoor space to the exhaust passage, a humidity control section for adsorbing moisture of the adsorbed air passing through and desorbing moisture to the regenerating air passing through, A cooling unit that absorbs the heat of adsorption accompanying the adsorption of the humidity control unit by the cooling air that is capable of absorbing the heat of adsorption by the cooling unit when moisture is adsorbed by the humidity control unit The present invention relates to an air conditioning system including a pair of humidity control elements.

Currently, newly built condominiums and detached houses are obligated to provide 24-hour ventilation, and are equipped with an air supply passage and an air supply means for supplying air taken from the outdoor space to the indoor space. An exhaust passage and exhaust means for exhausting air to the outdoor space are provided.
Further, in such a 24-hour ventilation system, an air conditioning system including one or more desiccant rotors is known in order to adjust the temperature and humidity of the air to be ventilated.
As shown in FIG. 6, the air conditioning system 200 has, as a basic configuration, an air supply passage R1 that supplies air taken in from an outdoor space to the indoor space, and air that is taken into the air supply passage R1 from the outdoor space. A first fan F1 to be circulated, an exhaust passage R2 for exhausting air taken in from the indoor space to the outdoor space, a second fan F2 for allowing air taken from the indoor space to flow to the exhaust passage R2, and an air supply passage A desiccant rotor Dr made of a breathable hygroscopic material is rotationally driven between an air supply region Da disposed in R1 and an exhaust region Db disposed in the exhaust passage R2, thereby dehumidifying the air passing through the air supply region Da. The rotor portion D that performs regeneration of the desiccant rotor Dr in the air that passes through the exhaust region Db, the air that flows downstream of the air supply region Da in the air supply passage R1, and the exhaust passage R2 The sensible heat exchanger EX1 that exchanges heat with the air that flows through the upstream side of the air region Db, and the air that flows between the sensible heat exchanger EX1 and the exhaust region Db in the exhaust passage R2 A heating unit EX2 that heats by heat exchange with a heat medium supplied by a pump (not shown) is provided (hereinafter, may be referred to as Conventional Technology 1. Also, the basic configuration) Therefore, prior art documents cannot be disclosed).
In the related art 1, the air taken in from the outdoor space is dehumidified in the air supply area Da of the desiccant rotor Dr, and the heat of adsorption generated by the dehumidification is reduced in the form of radiating heat by the sensible heat exchanger EX1. Then, it is supplied to the indoor space as conditioned air.
In the related art 1, in order to secure a constant dehumidification amount (for example, a dehumidification amount of 6 to 7 g / kg ′), it is necessary to flow air having a sufficiently high temperature to the exhaust region Db of the desiccant rotor Dr. For this reason, in the heating unit EX2, warm water of about 80 ° C. or more has to be used as a medium. For this reason, in the prior art, in the heating unit EX2, hot water having a medium temperature (for example, 50 ° C. or more and 70 ° C. or less, more specifically about 60 ° C.) that exists abundantly (is not effectively used) as exhaust heat is used as a heating medium. It could not be used as.

On the other hand, as another air-conditioning system using a desiccant, one using an air-cooled desiccant element that can be regenerated at a relatively low regeneration temperature as described in Patent Document 1 is known (hereinafter referred to as Prior Art 2). There).
As shown in FIG. 7, the air conditioning system 300 according to the related art 2 includes an air supply passage R1 that supplies air taken in from an outdoor space to the indoor space, and air that is taken in from the outdoor space into the air supply passage R1. The air supply means F1 for flowing, the exhaust passage R2 for exhausting the air taken in from the indoor space to the outdoor space, and the exhaust means F2 for allowing the air taken out from the indoor space to flow to the exhaust passage R2 are passed through. A humidity control unit DS that adsorbs moisture from the adsorbed air and desorbs the moisture to the regenerated air that passes through, and a cooling unit CS that absorbs the heat of adsorption accompanying the adsorption of the humidity control unit by the passing cooling air. A pair of humidity control element D1 and humidity control element D2 are provided so as to be able to absorb heat of adsorption by the cooling part CS when moisture is adsorbed by the wet part DS.
Further, the related art 2 includes a heat pump device that circulates refrigerant through a compressor (not shown), a condenser G, an expansion valve (not shown), and an evaporator J, and a humidity control element D1 on one side. Is provided with a switching mechanism K that switches between a state of air flow to and a state of air flow to the humidity control element D2 on the other side at regular intervals.
When the description is added, as shown in FIG. 7, the switching mechanism K sets the air supply passage R1 in a state in which the air taken in from the outdoor space flows through the humidity control section DS of the humidity control element D1 on one side, The air taken out from the indoor space through the exhaust passage R2 passes through the evaporator J, the cooling part CS of the humidity control element D1 on one side, the condenser G, and the humidity control part DS of the humidity control element D2 on the other side. Although not shown in the drawing, the first flow state in which the flow is performed in the order described, and the air taken in from the outdoor space through the air supply passage R1, the humidity control unit DS of the humidity control element D2 on the other side. The air taken out from the indoor space through the exhaust passage R2 is brought into the evaporator J, the cooling part CS of the humidity control element D2 on the other side, the condenser G, and the humidity control element D1 on the one side. The humidity control unit DS is configured to be switchable between a second flow state in which the humidity control unit DS flows in the order described.
Incidentally, when the switching mechanism K switches the air flow state to the first flow state, the outdoor air OA is dehumidified by passing through the humidity control section DS of the humidity control element D1, It is cooled by room air RA passing through the cooling unit CS and supplied to the indoor space as conditioned air SA. On the other hand, the humidity control section DS of the humidity control element D2 is regenerated because the room air RA heated by the condenser G is supplied.
In the above-described configuration, in the humidity control unit DS of the humidity control element D1, the outdoor air OA supplied as the conditioned air SA is absorbed by the indoor air RA flowing through the cooling unit CS, Since the dehumidification is performed, a higher dehumidifying ability can be exhibited as compared with the prior art 1. Therefore, the temperature of the air supplied to regenerate the humidity control section DS in the humidity control element D2 can be reduced.

    JP 2003-148768 A

  In the air conditioning system shown in the prior art 1 described above, a heating medium (hot water) of 80 ° C. or higher is supplied to the heater EX2 in order to regenerate the desiccant rotor Dr to such an extent that the desiccant rotor Dr can secure a necessary dehumidification amount. Therefore, it has been impossible to use medium-temperature hot water, which is abundant as exhaust heat, as a regeneration heat source.

  On the other hand, in the air conditioning system according to Patent Document 1, in the operation of adjusting the temperature and humidity, when the regeneration of the humidity control element D1 and the humidity control element D2 is considered, the switching mechanism K is cooled while dehumidifying. And the state heated by the condenser G are sequentially switched. Accordingly, since the cooled one is heated and the heated one is cooled, it takes time until each of the humidity control element D1 and the humidity control element D2 reaches a predetermined temperature, and it takes time to adjust the temperature and humidity. There was a possibility.

  Therefore, an air conditioning system that can quickly adjust the temperature and humidity is required.

The characteristic configuration of the air conditioning system according to the present invention is:
An air supply passage for supplying air taken from the outdoor space to the indoor space;
An air supply means for passing air taken from the outdoor space into the air supply passage;
An exhaust passage for exhausting air taken from the indoor space to the outdoor space;
Exhaust means for passing air taken out from the indoor space to the exhaust passage;
A humidity control unit that adsorbs moisture from the adsorbed air passing therethrough and desorbs moisture from the regenerated air that passes through, and a cooling unit that absorbs heat of adsorption accompanying the adsorption of the humidity control unit by the passing cooling air. An air conditioning system comprising a pair of humidity control elements equipped to absorb heat of adsorption in the cooling unit when moisture is adsorbed in the wet unit,
An action passage for sending air taken from the outdoor space to the outdoor space;
Working air supply means for passing air taken out from the outdoor space to the working passage;
A sensible heat exchange section for exchanging sensible heat of two fluids;
A heating unit that heats the air by heat exchange with a heat medium having exhaust heat,
A switching mechanism capable of switching between the air flow state to the humidity control element on one side and the air flow state of the humidity control element on the other side;
The switching mechanism is
The air taken in from the outdoor space through the air supply passage is in a state of flowing through the sensible heat exchange section after flowing through the humidity control section of the humidity control element on one side as adsorbed air,
After the air taken out from the indoor space through the exhaust passage passes through the sensible heat exchange part and the heating part in the order described, it passes through the humidity control part of the humidity control element on the other side as regenerated air. State
A first flow state where the air taken in the outdoor space from the outdoor space is in a state of flowing through the cooling portion of the humidity control element on one side as cooling air;
After the air taken in from the outdoor space through the air supply passage flows as the adsorbed air through the humidity control section of the humidity control element on the other side, the air flows through the sensible heat exchange section.
After the air taken out from the indoor space through the exhaust passage passes through the sensible heat exchange section and the heating section in the order described, the air passes through the humidity control section of the humidity control element on one side as regenerated air. State
And switching the second passage state where the air taken in the outdoor space from the outdoor space flows through the cooling part of the humidity control element on the other side as cooling air,
When switching from the first flow state to the second flow state, between the first flow state and the second flow state, the air taken in the outdoor space from the outdoor space is Switch to the first transition state in which the cooling part of the humidity control element on the other side flows as cooling air,
When switching from the second flow state to the first flow state, between the second flow state and the first flow state, the air that has taken in the working passage from the outdoor space is The cooling air is switched to the second transition state in which the cooling portion of the humidity control element on one side flows.

  For example, focusing on one humidity control element, when switching is performed between a first flow state in which the adsorbed air and the cooling air are flown and a second flow state in which the regeneration air is flowed, Since the temperature of the humidity control element is high immediately after the end of the flow-through state, the adsorption capacity of the humidity control element cannot be sufficiently exerted until the temperature decreases, and the dehumidification effect decreases. However, with the above-described characteristic configuration, when switching from the first flow state to the second flow state, the first transition state is provided between the first flow state and the second flow state, and the second When switching from the flow state to the first flow state, by providing a second transition state between the second flow state and the first flow state, the adsorbed air and the cooling air are provided to the respective moisture absorption elements. Can be preliminarily cooled with cooling air before passing through both. For this reason, since the adsorption capability of the humidity control element can be utilized immediately after the start of the flow of the adsorption air, it is possible to suppress a decrease in the dehumidification effect. Therefore, according to the present air conditioning system, it is possible to quickly adjust the temperature and humidity.

Further, according to the above characteristic configuration, a configuration including a pair of humidity control elements as an air-cooled desiccant element is employed, and the humidity control element that functions as the moisture absorption side with the pair of humidity control elements has its humidity control Since the adsorption heat is absorbed by the cooling unit when the moisture of the air passing through the unit is adsorbed, for example, the temperature of the regenerated air supplied to the regenerated side humidity control element is compared between a pair of humidity control elements. High dehumidifying ability can be exhibited even when the temperature is low.
In addition to such a configuration, the heating unit that heats the air by heat exchange with the heat medium that retains the exhaust heat is configured to heat the regeneration air supplied to the humidity control element on the regeneration target side. For example, by supplying a heating medium having a medium temperature (for example, 50 ° C. or more and 70 ° C. or less, more specifically about 60 ° C.) abundant as exhaust heat to the heating unit, the humidity control element on the reproduction side is good Can be played.
In view of the fact that the medium-temperature heat medium (for example, hot water stored in the intermediate part of the stratified hot water storage tank) has often been discarded without being used effectively, according to this configuration, The amount of heat input to the heating unit can be regarded as zero. In this case, it can be regarded that the COP in a substantial sense can be improved.
In addition, the air after being dehumidified by the dehumidifying element on the dehumidifying side is further cooled in the sensible heat exchange section by exchanging heat with indoor air, which is often lower in temperature than outdoor air in summer. Therefore, low-humidity and low-temperature air can be supplied to the indoor space as conditioned air.
In such a configuration, it can be configured without a heat pump device that consumes a large amount of power and mechanical durability may be a problem, while effectively utilizing the abundant medium temperature exhaust heat, It is possible to realize an air conditioning system capable of improving COP in a substantial sense while sufficiently suppressing the use of electric power and ensuring economic efficiency.

The switching mechanism is
In the first transition state, after the air taken from the outdoor space through the air supply passage flows through the humidity control section of the humidity control element on one side as the adsorbed air, the sensible heat exchange section is Let it flow,
In the second transition state, after the air taken from the outdoor space through the air supply passage flows through the humidity control section of the humidity control element on the other side as the adsorbed air, the sensible heat exchange section is It is preferable that the air flows.

  With such a configuration, in the first transition state in which the other moisture absorbing element is preliminarily cooled, the adsorbed air is passed through the one humidity adjusting element and the one moisture absorbing element is preliminarily cooled. In the second transition state, the adsorbed air can be passed through the humidity control element on the other side. Therefore, it is possible to continue dehumidification even in the first transition state and the second transition state, and to further increase the dehumidifying capacity of the air conditioning system.

  In addition, it is preferable that the first transition state and the second transition state are half the period of the first flow state and the second flow state.

  With such a configuration, the cooling effect can be enhanced in preliminarily cooling the hygroscopic element in the first transition state and the second transition state. Therefore, when the cooling air is allowed to flow through the hygroscopic element, the hygroscopic element can be sufficiently cooled.

  In addition, the heating unit has a heating medium having a temperature higher than the temperature of the air guided to the sensible heat exchange unit in the air supply passage and lower than the exhaust heat utilization lower limit threshold that is effectively used as exhaust heat. It is preferable to be configured to exchange heat with air.

  With such a configuration, the heating unit has a temperature that is higher than the temperature of the air led to the sensible heat exchange unit in the air supply passage and lower than the exhaust heat utilization lower limit threshold temperature that is effectively used as exhaust heat. Since the heat medium is configured to exchange heat with air, the heating unit can satisfactorily heat the air heat-exchanged with the air guided from the supply air passage at the sensible heat exchange unit. In addition, since air is heated using a heat medium having a temperature lower than the lower limit threshold for using exhaust heat (for example, about 65 ° C.) that is effectively used as exhaust heat, it has often not been used effectively as exhaust heat. The air can be heated using a heat medium at a high temperature, and the humidity control element on the playback side can be regenerated with the heated air.

  Further, it is preferable that the heating unit is configured to exchange heat with air using hot water taken out from an intermediate region between a lower region and an upper region of a hot water tank for stratified hot water storage as a heat medium. .

  With such a configuration, a configuration in which hot water guided to the heating unit as a heat medium is taken out from an intermediate region of the stratified hot water storage tank is employed. The limited medium temperature hot water can be actively taken out and used effectively as a heat source of the air conditioning system of the present invention.

The working passage is a branch passage branched from the most upstream part of the air supply passage, and the branch passage is a passage connected to the upstream side of the exhaust means by the exhaust passage,
The working air supply means and the exhaust means are preferably constituted by a single fan.

With such a configuration, the working passage is configured as a branch passage branched from the most upstream portion of the air supply passage, and the branch passage is configured as a passage connected to the upstream side of the exhaust means by the exhaust passage. Thus, by operating the exhaust means of the exhaust passage, air can be passed through the working passage.
Thereby, a working air supply means and an exhaust means can be comprised from a single fan.

Further, the air conditioning system includes at least a pair of the humidity control elements and the heating unit as a first unit,
It is preferable that at least the sensible heat exchange unit is configured as a second unit different from the first unit.

With such a configuration, for example, the first unit and the second unit can be separately provided. Therefore, the first unit is provided as an outdoor unit, and the second unit is provided under the floor in the room. It is possible to adopt a configuration that is arranged in
In the above characteristic configuration, the air supply means, the exhaust means, and the working air supply means may be provided in any of the first unit and the second unit.

It is a schematic block diagram of an air conditioning system. It is a schematic block diagram of an air conditioning system. It is a schematic block diagram of an air conditioning system. It is a figure which shows switching of the state through which air flows by the switching mechanism. It is a figure which shows an example of the effect by an air conditioning system. It is a schematic block diagram of the air conditioning system which concerns on the prior art 1. FIG. It is a schematic block diagram of the air conditioning system which concerns on the prior art 2. FIG.

The air-conditioning system 100 according to the embodiment of the present invention sufficiently uses electric power while effectively utilizing exhaust heat at an abundant medium temperature (for example, about 50 ° C. to 70 ° C., more specifically about 60 ° C.). The present invention relates to what can be suppressed and improve COP (Coefficient Of Performance) in a substantial sense while securing economic efficiency.
As shown in FIG. 1, the air conditioning system 100 includes a pair of air-cooled humidity control elements D1 and D2 that can perform temperature and humidity adjustment well even at a relatively low regeneration temperature, By switching the air flow state to the humidity control elements D1 and D2, the pair of humidity control elements D1 and D2 are alternately switched between the moisture absorption side and the regenerated side every predetermined time (for example, every 5 minutes). Heat exchange is performed between the switching mechanism K, the sensible heat exchanger EX1 (an example of the sensible heat exchanger) that can exchange the sensible heat of the two fluids, and the heat medium flowing through the heat medium passage R4. It comprises a heater EX2 (an example of a heating unit) that is configured as a heat exchanger and heats air by heat exchange with a heat medium that has exhaust heat.
As shown in FIG. 1, each of the pair of humidity control elements D1 and D2 includes a flat humidity control section DS that adsorbs moisture of the adsorbed air passing therethrough and desorbs moisture from the regenerated air that passes therethrough, and cooling that passes therethrough. A flat plate-like cooling unit CS that absorbs heat of adsorption accompanying adsorption of the humidity control unit DS with air is alternately stacked.
In the humidity control section DS and the cooling section CS, a corrugated plate member obtained by processing a thin plate of aluminum, polypropylene, or the like into a corrugated plate is disposed in a state where the wave front is along the plate surface. The corrugated plate member and the corrugated plate member disposed in the cooling part CS are disposed in a state where the waves on the wave front are orthogonal to each other.
The corrugated plate member disposed in the humidity control section DS is coated with a hygroscopic material so that moisture of the air flowing through the humidity control section DS can be adsorbed.
As a result, the humidity control elements D1 and D2 have the cooling unit in a state where air is passed from the specific direction to the humidity control unit DS in a stacking direction of the humidity control unit DS and the cooling unit CS. Air is allowed to flow from the direction orthogonal to the specific direction with respect to the CS so as to recover the heat of moisture absorption due to moisture absorption in the humidity control section DS.

  In the air conditioning system 100 according to the embodiment, the air supply passage R1 that supplies the air taken in from the outdoor space to the indoor space, and the first fan that allows the air taken in from the outdoor space to flow into the air supply passage R1. F1 (an example of an air supply unit), an exhaust passage R2 that exhausts air taken in from the indoor space to the outdoor space, and a second fan that causes the air taken out from the indoor space to flow into the exhaust passage R2 (an example of the exhaust unit) And a working path R3 for sending air taken in from the outdoor space to the outdoor space, and a second fan F2 (an example of working air supply means) for causing the air taken in from the outdoor space to flow to the working path R3. . Although detailed description will be given later, in the present embodiment, the exhaust means and the working air supply means are configured by a single second fan F2.

As shown in FIG. 1, the switching mechanism K is not shown in the first flow state in which the humidity control element D1 on one side is the moisture absorption side and the humidity control element D2 on the other side is the regenerated side. The second flow state in which the humidity control element D2 on the other side is the moisture absorption side and the humidity control element D1 on the one side is the regenerated side is switchable.
When the explanation is added, as shown in FIG. 1, the first flow state is that air taken in the outdoor passage through the air supply passage R1 passes through the humidity control section DS of the humidity control element D1 on one side as adsorbed air. After the flow, the sensible heat exchanger EX1 is made to flow, and the exhaust passage R2 is regenerated after the air taken out from the indoor space flows through the sensible heat exchanger EX1 and the heater EX2 in the order described. The air is passed through the humidity control section DS of the humidity control element D2 on the other side, and the air that has taken in the working path R3 from the outdoor space passes through the cooling section CS of the humidity control element D1 on the one side as cooling air. It will be in a state of flowing.
On the other hand, the second flow state is a state in which the humidity control element D1 on one side and the humidity control element D2 on the other side in FIG. 1 are interchanged, and the air supply passage R1 is taken in from the outdoor space. After the air has passed through the humidity control section DS of the humidity control element D2 on the other side as adsorbed air, the air is passed through the sensible heat exchanger EX1, and the air taken out from the indoor space through the exhaust passage R2 is After passing the sensible heat exchanger EX1 and the heater EX2 in the order described, the humidity control section DS of the humidity control element D1 on one side is made to flow as regenerated air, and the working path R3 is taken from the outdoor space. This is a state in which the air flows through the cooling part CS of the humidity control element D2 on the other side as cooling air.
From the above, in the first flow state, the humidity control element D1 on one side functions as the moisture absorption side and the humidity control element D2 on the other side becomes the regenerated side, and in the second flow state, The humidity control element D1 on the side serves as the playback target side, and the humidity control element D2 on the other side functions as the moisture absorption side.
In the following description, the switching mechanism K is assumed to be in a state where it is switched to the first flow state unless otherwise specified.

  When the description of the working channel R3 is added, the working channel R3 has an upstream end connected to the upstream side of the humidity control element D1 on the one side by the air supply channel R1, and a downstream end connected to the other side by the exhaust channel R2. It is provided in the form of connecting to the upstream side of the second fan F2 on the downstream side of the wet element D2. The air flows through the working passage R3 by being sucked by the second fan F2, and the air passes through the cooling part CS of one humidity control element D1 on the moisture absorption side. That is, in this embodiment, the second fan F2 functions as working air supply means.

  In the embodiment, the first fan F1 is provided between the one humidity control element D1 and the sensible heat exchanger EX1 in the air supply passage R1, and the second fan F2 is provided in the exhaust passage R2. , Provided on the downstream side of the other humidity control element D2.

  When the description of the working passage R3 is added, the working passage R3 is a branch passage branched from the most upstream portion upstream of the first fan F1 of the air supply passage R1, and the branch passage is the second exhaust passage R2. The flow path is connected to the upstream side of the fan F2 and the downstream side of the humidity control element D2 on the other side. With this configuration, by operating the second fan F2 provided in the exhaust passage R2, air can be taken from the supply passage R1 into the branch passage as the working passage R3.

By adopting the above-described configuration, the air flowing through the air supply passage R1 is converted into the air passing through the cooling unit CS when passing through the humidity control unit DS of one humidity control element D1 on the moisture absorption side. Thus, dehumidification is performed while absorbing the heat of adsorption. For example, even if the humidity control elements D1 and D2 are regenerated at a relatively low regeneration temperature as compared with the prior art 1, a high dehumidification capability can be exhibited.
That is, in the heater EX2 according to the present embodiment, it is sufficient that the regenerative air can be heated to an intermediate temperature that is a relatively low temperature (for example, 50 ° C. or more and 70 ° C. or less, more specifically about 60 ° C.). Medium temperature hot water stored in an intermediate region between a lower region and an upper region of a hot water storage tank (not shown) for storing hot water is configured to be usable as a heat medium.
Thereby, in the heater EX2, for example, the exhaust heat utilization lower limit threshold (for example, 60 ° C.) that is higher than the temperature of the air guided to the sensible heat exchanger EX1 in the supply passage R1 and is effectively used as exhaust heat. Hot water (heat medium) having a temperature lower than that of the humidity control elements D1 and D2 is used as a regeneration heat source.

  In addition, although illustration is abbreviate | omitted, the air conditioning system 100 which concerns on the said embodiment comprises at least a pair of humidity control elements D1 and D2 and a heater EX2 as a first unit, and the sensible heat exchanger EX1 is the first. The second unit is separate from the unit. In the embodiment, the first fan F1 and the second fan F2 are included in the first unit.

  The switching mechanism K switches between the first flow state and the second flow state as described above, and further, when switching from the first flow state to the second flow state, the first flow state and the second flow state. When switching from the second flow state to the first flow state between the two flow states and when switching from the second flow state to the first flow state, the second transition state between the second flow state and the first flow state Switch to. As shown in FIG. 2, the first transition state is a state in which the air taken in the outdoor space through the working passage R3 flows through the cooling portion CS of the humidity control element D2 on the other side as cooling air. On the other hand, the second transition state is a state in which the humidity control element D2 on the other side and the humidity control element D1 on the one side are interchanged in FIG. 2, and the air that has taken in the action passage R3 from the outdoor space. Is a state in which the cooling part CS of the humidity control element D1 on one side flows as cooling air.

Further, in the present embodiment, as shown in FIG. 3, the switching mechanism K is configured such that, in the first transition state, the air taken into the air supply passage R1 from the outdoor space is the humidity control element D1 on one side as adsorbed air. After passing through the humidity control section DS, the sensible heat exchange section EX1 is passed. On the other hand, in the second transition state in which the humidity control element D1 on one side and the humidity control element D2 on the other side are interchanged in FIG. 3, the air taken into the air supply passage R1 from the outdoor space is adsorbed air. As described above, after passing the humidity control section DS of the humidity control element D2 on the other side, the sensible heat exchange section EX1 is passed.
As described above, in the first transition state, the humidity control element D1 on one side works as the moisture absorption side, and the humidity control element D2 on the other side enters the precooling state (moisture absorption preparation state), and is in the second transition state. The humidity control element D1 on one side is in a precooled state (moisture absorption preparation state), and the humidity control element D2 on the other side functions as a moisture absorption side. In practice, the state shown in FIG. 2 and the state shown in FIG. 3 are established at the same time.

  FIG. 4 shows a time chart showing switching of a state (hereinafter referred to as “flow state”) through which air is passed by the switching mechanism K. As shown in FIG. 4, the timing at which the operation of the air conditioning system 100 is started is assumed to be t = t0. First, the switching mechanism K changes the flow state to the first flow state over a period T1 from t0 to t1. Specifically, the air taken from the outdoor space through the air supply passage R1 flows through the humidity control section DS of the humidity control element D1 on one side as adsorbed air, and then flows through the sensible heat exchanger EX1. In the state (# 01), after the air taken out from the indoor space through the exhaust passage R2 passes through the sensible heat exchanger EX1 and the heater EX2 in the order described, the regenerated air of the humidity control element D2 on the other side A state in which the humidity control unit DS flows (# 02), and a state in which the air taken in the outdoor space through the working passage R3 flows as cooling air through the cooling unit CS of the humidity control element D1 on one side (# 03). ).

  Next, the switching mechanism K changes the flow state to the first transition state over a period T2 from t1 to t2. That is, the switching mechanism K switches to the first transition state after the first flow state. Specifically, the action passage R3 is in a state (# 04) in which the air taken in from the outdoor space flows through the cooling part CS of the humidity control element D2 on the other side as cooling air, and the air supply passage R1 is After the air taken in from the space flows as the adsorbed air through the humidity control section DS of the humidity control element D1 on one side, the sensible heat exchange section EX1 is flowed (# 05).

  Subsequently, the switching mechanism K changes the flow state to the second flow state over a period T3 from t2 to t3. That is, the switching mechanism K switches to the second flow state after the first transition state. Specifically, the air taken from the outdoor space through the air supply passage R1 flows through the humidity control section DS of the humidity control element D2 on the other side as adsorbed air, and then flows through the sensible heat exchanger EX1. In the state (# 06), after the air taken out from the indoor space through the exhaust passage R2 passes through the sensible heat exchanger EX1 and the heater EX2 in the order described, the regenerated air of the humidity control element D1 on one side A state in which the humidity control section DS flows (# 07), and a state in which the air taken in the outdoor space through the working passage R3 flows as cooling air through the cooling section CS of the humidity control element D2 on the other side (# 08). ).

  Further, the switching mechanism K changes the flow state to the second transition state over a period T4 from t3 to t4. That is, the switching mechanism K switches to the second transition state after the second flow state. Specifically, the action passage R3 is set in a state (# 09) in which the air taken in from the outdoor space flows through the cooling portion CS of the humidity control element D1 on one side as cooling air, and the air supply passage R1 is connected to the outdoor passage. After the air taken in from the space flows as the adsorbed air through the humidity control section DS of the humidity control element D2 on the other side, it is in a state of flowing through the sensible heat exchange section EX1 (# 10). The switching mechanism K repeatedly performs such switching along a series of flows from the first flow state to the second transition state.

  Note that the first transition state and the second transition state are preferably half the period of the first flow state and the second flow state. That is, as shown in FIG. 4, when the period of the first flow state is T1, the period of the first transition state is T2, the period of the second flow state is T3, and the period of the second transition state is T4, It is preferable that T2 = T4 = T1 / 2 = T3 / 2.

FIG. 5 shows data indicating a change in outlet humidity (humidity of conditioned air supplied to the room) when the flow state is switched according to the present embodiment. The sample used for acquiring this data was a moisture absorbent coating amount: 30 [g / m ² ], a cell dimension: 1.6 step height × 3.2 pitch [mm], and an adsorbent: sodium polyacrylate moisture absorbent. , Substrate: aluminum. Using such samples, humidity control elements D1 and D2 having a height of 100 [mm], a dehumidified air side channel width: 125 [mm], and a cooling air side channel width: 250 [mm] are prepared. did. The acquisition conditions (evaluation conditions) are as follows: dehumidified air temperature and humidity: 30 [° C.], 60 [% RH], dehumidified air flow rate: 24 [m ³ / h], cooling air temperature: 27 [° C.], Air volume for cooling: 48 [m ³ / h], air temperature for regeneration: 50 [° C.], 13 [% RH], air volume for regeneration: 24 [m ³ / h]

  In FIG. 5, the vertical axis represents outlet humidity and the horizontal axis represents time. In addition, data by the air conditioning system 100 (hereinafter referred to as “present data”) is indicated by a solid line, and as a comparison result, the flow state is switched between the first flow state and the second flow state (that is, Data (hereinafter referred to as “comparison data”) in the case where the first transition state and the second transition state are not provided is indicated by a broken line. T1 and T3 when this data is acquired are 60 seconds, and T2 and T4 are 30 seconds. Further, the period of the first flow state and the second flow state when the comparison data is acquired is 90 seconds.

  As shown in FIG. 5, in the comparative data, it was 30 seconds after the start of operation that the humidity near the outlet was the lowest, that is, 30 seconds were required for cooling. On the other hand, in the present data, the provision of the preliminary cooling state composed of the first transition state and the second transition state, the humidity near the outlet can be reduced most 15 seconds after the start of operation.

  Here, the above-described preliminary cooling (preceding cooling) is performed at the time of acquisition of the present data with respect to the acquisition of the comparison data. When such preliminary cooling is performed, the regeneration time is shortened. When the regeneration time is shortened, the total amount of heat given to the humidity control elements D1 and D2 is reduced. Therefore, in order to complement the amount of heat corresponding to the shortening of the regeneration time, the air volume was also increased. For example, in the preliminary cooling of 30 [seconds], the regeneration time is changed from the original 90 [seconds] to 60 [seconds]. Then, since the total amount of heat is small if the RA air volume remains 1 [times], the condition can be adjusted by setting the air volume to 90/60 = 1.5 [times]. The average dehumidification amount acquired in this way is as follows.

  Leading time: 0 [seconds], RA air volume magnification: 1.00 [times], average dehumidification amount is 6.65 [g / kg '], preceding time: 0 [seconds], RA air volume magnification: 1.25 The average dehumidification amount at [times] is 6.95 [g / kg '], the preceding time: 0 [seconds], and the RA air volume magnification: 1.50 [times], the average dehumidification amount is 6.87 [g] / Kg ']. Moreover, when the preceding time is 30 [seconds] and the RA air volume magnification is 1.00 [times], the average dehumidification amount is 6.81 [g / kg '], the preceding time is 30 [seconds], and the RA air volume magnification is 1 The average dehumidification amount at 6.25 [times] is 6.92 [g / kg '], the preceding time: 30 [seconds], and the RA air volume magnification: 1.50 [times], the average dehumidification amount is 7.05. [G / kg ']. From these results, for example, when the RA air volume magnification is 1.00 [times], the average dehumidification amount is 6.65 g / in the case where the conventional system related to the comparison data is used (when the preceding time is 0 [seconds]). What was kg ′ could also be increased to 6.81 g / kg ′ in the air conditioning system 100 (in the case of the preceding time: 30 [seconds]). Thus, according to the air conditioning system 100, it is possible to enhance the dehumidifying effect and the cooling effect.

[Another embodiment]
(1) In the above embodiment, the arrangement position of the first fan F1 is limited to a specific position on the air supply passage R1, and the arrangement position of the second fan F2 is specified on the exhaust passage R2. Limited to position.
However, the first fan F1 may be provided at any position on the supply passage R1, and the second fan F2 may be provided at any position on the exhaust passage R2. It may be provided.
However, the connection portion of the working passage R3 to the exhaust passage R2 is upstream of the second fan F2.

(2) The working passage R3 may not be connected to the air supply passage R1 and the exhaust passage R2. In this case, a third fan (an example of the working air supply means) is provided in the working passage R3 as the working air supply means in addition to the second fan F2.

(3) In the above embodiment, the switching mechanism K is configured to switch the air flow state to the pair of humidity control elements D1, D2, that is, the supply valve R1, the exhaust passage R2, and the working passage R3 are switched valves, etc. Thus, the example of switching between the moisture absorption side and the regenerated side of the pair of humidity control elements D1 and D2, that is, switching between the first flow state and the second flow state is shown.
However, the switching mechanism K may be configured to switch between the first flow state and the second flow state by replacing the arrangement of the pair of humidity control elements D1 and D2 itself.

(4) In the above embodiment, the configuration example in which hot water stored in the intermediate region of the hot water storage tank (not shown) is passed as a heat medium to the heater EX2. However, for example, as the heating medium guided to the heater EX2, a configuration in which circulating cooling water is passed so as to recover the heat generated in the engine or the fuel cell may be adopted. Moreover, although the example which uses the heat medium (for example, about 60 degreeC heat medium) which has abundant medium temperature exhaust heat was shown as a heat medium guide | induced to the heater EX2 in the said embodiment, it was high temperature separately. You may use the heat medium which holds the waste heat of.

(5) In the above embodiment, the configuration related to the air conditioning system 100 is divided into the first unit and the second unit. However, the unit is configured as an integrated unit without being divided. It doesn't matter.

(6) In the above embodiment, in the first transition state, the switching mechanism K causes the air that has taken in the action passage R3 from the outdoor space to flow as the cooling air through the cooling unit CS of the humidity control element D1 on the other side. At the same time, the air taken from the outdoor space through the air supply passage R1 flows as the adsorbed air through the humidity control section DS of the humidity control element D1 on one side, and then flows through the sensible heat exchange section EX1. In the second transition state, in the second transition state, the air taken in from the outdoor space is brought into a state in which the cooling portion CS of the humidity control element D1 on the one side flows as cooling air, and the air supply passage R1 is In the above description, the air taken in from the outdoor space flows through the humidity control section DS of the humidity control element D2 on the other side as adsorbed air, and then flows through the sensible heat exchange section EX1. However, in the first transition state, the switching mechanism K makes the working passage R3 only in a state where the air taken in from the outdoor space flows as cooling air through the cooling portion CS of the humidity control element D1 on the other side. In the transition state, it is also possible to configure the working passage R3 so that the air taken in from the outdoor space is only in a state in which the cooling portion CS of the humidity control element D1 on one side flows as cooling air.

(7) In the above embodiment, the first transition state and the second transition state have been described as being half the period of the first flow state and the second flow state. The transition state can be set in a period other than half the period of the first flow state and the second flow state.

  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.

  The present invention relates to an air supply passage for supplying air taken in from an outdoor space to the indoor space, an air supply means for flowing air taken from the outdoor space into the air supply passage, and air taken from the indoor space to the outdoor space An exhaust passage for exhausting to the exhaust passage, an exhaust means for passing the air taken out from the indoor space to the exhaust passage, a humidity control section for adsorbing moisture of the adsorbed air passing through and desorbing moisture to the regenerating air passing through, A cooling unit that absorbs the heat of adsorption accompanying the adsorption of the humidity control unit by the cooling air that is capable of absorbing the heat of adsorption by the cooling unit when moisture is adsorbed by the humidity control unit It can be used for an air conditioning system including a pair of humidity control elements.

100: Air-conditioning system D1: Humidity adjustment element D2: Humidity adjustment element CS: Cooling part DS: Humidity adjustment part EX1: Sensible heat exchange part EX2: Heater (heating part)
F1: First fan (air supply means)
F2: Second fan (exhaust means)
K: switching mechanism R1: air supply passage R2: exhaust passage R3: working passage

Claims (7)

An air supply passage for supplying air taken from the outdoor space to the indoor space;
An air supply means for passing air taken from the outdoor space into the air supply passage;
An exhaust passage for exhausting air taken from the indoor space to the outdoor space;
Exhaust means for passing air taken out from the indoor space to the exhaust passage;
A humidity control unit that adsorbs moisture from the adsorbed air passing therethrough and desorbs moisture from the regenerated air that passes through, and a cooling unit that absorbs heat of adsorption accompanying the adsorption of the humidity control unit by the passing cooling air. An air conditioning system comprising a pair of humidity control elements equipped to absorb heat of adsorption in the cooling unit when moisture is adsorbed in the wet unit,
An action passage for sending air taken from the outdoor space to the outdoor space;
Working air supply means for passing air taken out from the outdoor space to the working passage;
A sensible heat exchange section for exchanging sensible heat of two fluids;
A heating unit that heats the air by heat exchange with a heat medium having exhaust heat,
A switching mechanism capable of switching between the air flow state to the humidity control element on one side and the air flow state of the humidity control element on the other side;
The switching mechanism is
The air taken in from the outdoor space through the air supply passage is in a state of flowing through the sensible heat exchange section after flowing through the humidity control section of the humidity control element on one side as adsorbed air,
After the air taken out from the indoor space through the exhaust passage passes through the sensible heat exchange part and the heating part in the order described, it passes through the humidity control part of the humidity control element on the other side as regenerated air. State
A first flow state where the air taken in the outdoor space from the outdoor space is in a state of flowing through the cooling portion of the humidity control element on one side as cooling air;
After the air taken in from the outdoor space through the air supply passage flows as the adsorbed air through the humidity control section of the humidity control element on the other side, the air flows through the sensible heat exchange section.
After the air taken out from the indoor space through the exhaust passage passes through the sensible heat exchange section and the heating section in the order described, the air passes through the humidity control section of the humidity control element on one side as regenerated air. State
And switching the second passage state where the air taken in the outdoor space from the outdoor space flows through the cooling part of the humidity control element on the other side as cooling air,
When switching from the first flow state to the second flow state, between the first flow state and the second flow state, the air taken in the outdoor space from the outdoor space is Switch to the first transition state in which the cooling part of the humidity control element on the other side flows as cooling air,
When switching from the second flow state to the first flow state, between the second flow state and the first flow state, the air that has taken in the working passage from the outdoor space is The air conditioning system which switches to the 2nd transition state made into the state which flows the said cooling part of the said humidity control element of one side as cooling air. The switching mechanism is
In the first transition state, after the air taken from the outdoor space through the air supply passage flows through the humidity control section of the humidity control element on one side as the adsorbed air, the sensible heat exchange section is Let it flow,
In the second transition state, after the air taken from the outdoor space through the air supply passage flows through the humidity control section of the humidity control element on the other side as the adsorbed air, the sensible heat exchange section is The air conditioning system according to claim 1, wherein the air conditioning system is in a state of allowing flow.   3. The air conditioning system according to claim 1, wherein the first transition state and the second transition state are half of a period of the first flow state and the second flow state.   The heating unit is a heating medium having a temperature higher than the temperature of the air led to the sensible heat exchange unit in the air supply passage and lower than the exhaust heat utilization lower limit threshold that is effectively used as exhaust heat. The air conditioning system according to any one of claims 1 to 3, wherein the air conditioning system is configured to exchange heat with the air.   The heating unit is configured to exchange heat with air using hot water taken from an intermediate region between a lower region and an upper region of a hot water storage tank for storing hot water as a stratified hot water as a heat medium. The air conditioning system according to any one of the above. The working passage is a branch passage branched from the most upstream portion of the air supply passage, and the branch passage is a passage connected to the upstream side of the exhaust means in the exhaust passage,
The air conditioning system according to any one of claims 1 to 5, wherein the working air supply unit and the exhaust unit are configured by a single fan. At least a pair of the humidity control elements and the heating unit are configured as a first unit,
The air conditioning system according to any one of claims 1 to 6, wherein at least the sensible heat exchange unit is configured as a second unit different from the first unit.

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