JP2019190691A - air conditioner - Google Patents

Abstract

To provide an air conditioner capable of reducing the influence on an air conditioning space due to slime created in a humidifier.SOLUTION: An air conditioner comprises: an air-supply passage for supplying ambient air to an air-conditioned space; an exhaust passage for discharging return air from the air-conditioned space; a sensible heat exchanger for sensible heat exchanging between the ambient air and the return air; a desiccant part in which between the ambient air and the return air, moisture is adsorbed from one air, the adsorbed moisture is desorbed to the other air; a first humidifier disposed on the upstream or inside of the sensible heat exchanger in the exhaust passage; and a second humidifier disposed on the upstream of the desiccant part in the exhaust passage.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air conditioner.

  For example, when performing air conditioning in a building such as a commercial building, the air outside the building (outside air) is taken into the room that is the air-conditioned space of the building, and the return air from the indoor air (inside air) is An air conditioner that exhausts to the outside is known (for example, Patent Document 1). Thus, ventilation is performed by taking outside air into the room and exhausting return air outside the room. Normally, this indoor air is air-conditioned so that it has a predetermined temperature or humidity by another air conditioner that circulates and air-conditions the room. Therefore, if the return air from the room air is simply exhausted, Enthalpy is also lost, and the air conditioning load in the room increases due to the outside air taken in.

  On the other hand, the air conditioner of Patent Document 1 exchanges sensible heat and latent heat between the return air to be exhausted and the outside air to be taken in when performing ventilation, so that the sensible heat and latent heat of the return air to be exhausted are exchanged. (Enthalpy) is collected and the latent heat load and sensible heat load due to the outside air taken in are reduced. The air conditioner of Patent Document 1 further includes a vaporizing humidifier (outside air humidifying unit), and humidifies the outside air after replacing sensible heat and latent heat with return air. That is, the vaporizing humidifier is provided in an outside air path (air supply path) that is a path through which outside air flows.

JP, 2006-205642, A

  In the vaporizing humidifier, a container for holding the water to be vaporized is required. Since the container is in a state where water is accumulated and slime (a lump of microorganisms) is generated, it is necessary to take measures to suppress the generation of the slime. Since the humidifier of the air conditioner of Patent Document 1 is provided in an outside air path, that is, an air supply path through which air supplied to the room flows, there is a problem that the influence of the slime on the room is large.

  This invention is made | formed in view of such a situation, and it aims at providing the air conditioner which can reduce the influence on the to-be-conditioned space by the slime which generate | occur | produces in a humidifier.

  An air conditioner according to an aspect of the present disclosure is manifested between an air supply path for supplying outside air to an air-conditioned space, an exhaust path for exhausting return air from the air-conditioned space, and the outside air and the return air. A sensible heat exchanger for exchanging heat; a desiccant part that adsorbs moisture from one air between the outside air and the return air; and desorbs the adsorbed moisture to the other air; and the sensible heat in the exhaust path A first humidifier disposed upstream or inside the exchanger; and a second humidifier disposed upstream of the desiccant part in the exhaust path.

  In this aspect, since the first humidifier and the second humidifier are both provided in the exhaust path, the influence of the slime generated in the first humidifier and the second humidifier on the air-conditioned space is reduced. be able to.

  In the air conditioner according to an aspect of the present disclosure, the first humidifier and the second humidifier are provided with at least a part of the sensible heat exchanger interposed therebetween, and the desiccant unit is the second humidifier. Rather than in the exhaust direction.

  In this aspect, since the first humidifier and the second humidifier are provided with at least a part of the sensible heat exchanger interposed therebetween, either the first humidifier or the second humidifier is provided. The amount of sensible heat of the return air exchanged with the outside air by the sensible heat exchanger can be varied while humidifying. Moreover, the moisture humidified by the first humidifier or the second humidifier can be adsorbed and recovered by the desiccant part.

  In the air conditioner according to one aspect of the present disclosure, the sensible heat exchanger includes a return air path through which exhausted return air passes and an outside air path through which supplied outside air passes, The effective length is longer than the effective length of the outside air path.

  In this aspect, the freedom degree of arrangement | positioning of a 1st humidifier or a 2nd humidifier can be improved by making the effective length of a return air path longer than the effective length of an external air path.

  In the air conditioner according to one aspect of the present disclosure, the sensible heat exchanger bypasses the return air path through which the returned return air passes, the outside air path through which the supplied outside air passes, and the outside air path. And a detour wall portion close to the return air path.

  In this aspect, the bypass wall portion allows the outside air path to be bypassed with a simple structure to be close to the return air path, thereby improving the efficiency of sensible heat exchange.

  In the air conditioner according to an aspect of the present disclosure, the sensible heat exchanger includes a return air path through which exhausted return air passes and an outside air path through which supplied outside air passes, and the return air path and At least a part of the outside air path is provided to have a cross flow.

  In this aspect, the efficiency of sensible heat exchange can be improved by making at least a part of the return air path and the outside air path into a cross flow.

  An air conditioner according to an aspect of the present disclosure includes a control unit that controls a plurality of operation modes including a humidification operation and a cooling operation, and the control unit includes the second humidifier when the operation mode is the humidification operation. When the operation mode is the cooling operation, the first humidifier is driven.

  In this mode, in the case of humidification operation, the second humidifier is driven to increase the absolute humidity of the return air, and the moisture of the return air is adsorbed by the downstream desiccant part to be desorbed to the outside air. The air-conditioned space can be humidified. In the case of cooling operation, the first humidifier is driven, the temperature of the return air is lowered by the heat of vaporization, and the return air and the outside air are sensible heat exchanged to efficiently cool the air-conditioned space. it can. Therefore, the humidification operation and the cooling operation can be efficiently performed by driving or stopping the first humidifier and the second humidifier according to the operation mode.

  An air conditioner according to an aspect of the present disclosure is provided in the air supply path, provided in the air supply path, a first heat exchanger that exchanges heat with outside air before passing through the desiccant unit, and the sensible heat A second heat exchanger that exchanges heat with the outside air after passing through the exchanger; and a third heat exchanger that is provided in the exhaust path and exchanges heat with the return air before passing through the desiccant part.

  By the first heat exchanger and the third heat exchanger, moisture adsorption or desorption by the desiccant portion can be efficiently performed. Moreover, the temperature at the time of supplying the outside air after passing through the sensible heat exchanger to the air-conditioned space can be brought close to a desired temperature by the second heat exchanger.

  An air conditioner according to an aspect of the present disclosure includes a control unit that controls a plurality of operation modes including a humidification operation, a heating operation, and a dehumidification operation, and the control unit includes the first controller when the operation mode is the humidification operation. 1 heat exchanger is operated as a radiator, when the operation mode is the heating operation, the second heat exchanger is operated as a radiator, and when the operation mode is the dehumidifying operation, the third heat exchanger is operated. Is operated as a radiator.

  By causing the first heat exchanger, the second heat exchanger, or the third heat exchanger to operate as a radiator corresponding to each operation mode, moisture desorption by the desiccant unit is promoted to efficiently humidify or dehumidify. In addition, the air-conditioned space can be efficiently heated.

  It is possible to provide an air conditioner that can reduce the influence of the slime generated in the humidifier on the air-conditioned space.

It is a schematic diagram which shows one structural example (warm water circuit) of the air conditioner which concerns on Embodiment 1. FIG. It is a schematic diagram which shows one structure of a sensible heat exchanger. It is explanatory drawing (table) regarding the operation mode (at the time of a hot water circuit) of an air conditioner. It is explanatory drawing (air diagram) regarding the state of the external air and ventilation at the time of operation mode heating humidification (humidification and heating). It is a block diagram (controller) which shows one structure of a control part. It is a flowchart which shows the process sequence (at the time of a hot water circuit) of a control part. It is a schematic diagram which shows one structural example (cold / hot water circuit) of the air conditioner which concerns on Embodiment 2. FIG. It is explanatory drawing (table | surface) regarding the operation mode (at the time of a cold water circuit) of an air conditioner. It is a schematic diagram which shows one structure of the sensible heat exchanger which concerns on the modification 1 (1st humidification part is an intermediate | middle). It is a schematic diagram which shows one structure of the sensible heat exchanger which concerns on the modification 2 (two 1st humidification parts). It is a schematic diagram which shows one structure of the sensible heat exchanger which concerns on the modification 3 (cross flow). It is a schematic diagram which shows one structure of the sensible heat exchanger which concerns on the modification 4 (two orthogonal flows). It is a schematic diagram which shows one structure of the sensible heat exchanger which concerns on the modification 5 (Two orthogonal flows and a 1st humidification part are intermediate | middle). It is a schematic diagram which shows one structure of the sensible heat exchanger which concerns on the modification 6 (Two orthogonal flows and two 1st humidification parts).

(Embodiment 1)
Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a schematic diagram illustrating a configuration example (warm water circuit) of the air conditioner 1 according to the first embodiment. In FIG. 1, the right side on the paper indicates the room, and the left side indicates the outdoor side. RA (return air) indicates the return air from the indoor air, and EA (exhaust air) indicates the exhaust air by the return air. OA (out air) indicates outside air, and SA (service air) indicates air supply by the outside air.

  The air conditioner 1 includes a sensible heat exchanger 2, a first humidifier 3, a second humidifier 4, a desiccant unit 6, a first heat exchanger 7, a second heat exchanger 8, and a third heat exchanger 9. . The air conditioner 1 supplies the indoor air (outside air) and the exhaust path 13 for exhausting the return air from the indoor air (inside air) to the outside between the room as the air-conditioned space and the outside. An air supply path 14 is included.

  The sensible heat exchanger 2 is provided across both the air supply path 14 and the exhaust path 13, and a return air path 21 serving as a path through which the return air from the room passes and outside air from the outside pass. And an outside air path 22 serving as a route. The inlet of the return air path 21 is located on the indoor side (inlet side) of the exhaust path 13 and communicates with the outside air path. The outlet of the return air path 21 is located on the outdoor side (exit side) of the exhaust path 13 and communicates with the outside air path. The return air path 21 is provided so that the extending direction of the return air path 21 in the vicinity of the inlet and the outlet intersects the exhaust direction of the return air in the exhaust path 13. It is provided so as to face the inner peripheral surface side.

The inlet of the outside air path 22 is located on the outdoor side (inlet side) of the air supply path 14 and communicates with the air supply path 14. The outlet of the outside air path 22 is located on the outdoor side (outlet side) of the air supply path 14 and communicates with the air supply path 14. The outside air path 22 is provided so that the extending direction of the outside air path 22 near the inlet and the outlet is substantially parallel to the extending direction of the outside air path.

  The return air path 21 and the outside air path 22 each have a plurality of paths, and the return air path 21 and the outside air path 22 are stacked so as to alternate with each other in the vertical direction on the paper (perpendicular to the supply / exhaust direction). The return air and the outside air are not mixed in the sensible heat exchanger 2. The flow of air (return air and outside air) in each of the return air path 21 and the outside air path 22 forms an alternating current in opposite directions. The sensible heat is exchanged between the return air passing through the return air path 21 and the outside air passing through the outside air path 22, such as between the portions where the return air path 21 and the outside air path 22 are stacked. The return air path 21 and the outside air path 22 are made of, for example, a metal having good heat conductivity (for example, a metal such as aluminum or copper, or an alloy containing these as a main component), thereby improving the efficiency of sensible heat exchange. be able to.

  Inside the sensible heat exchanger 2, a bypass wall portion 23 is provided for bypassing the return air path 21 and bringing it close to the outside air path 22. The detour wall portion 23 is a wall portion formed with a predetermined length in the vertical direction between two openings serving as an inlet and an outlet of a return air path 21 provided above the sensible heat exchanger 2. . In other words, the bypass wall 23 is a wall that divides the opening provided above the sensible heat exchanger 2 into two openings, an inlet and an outlet.

  The return air path 21 is formed so as to be detoured in a U shape by the detour wall portion 23, and the outside air path is within a predetermined range in which the shape of the return air path 21 is curved with the U-shaped apex as a reference. 22 so as to be close to each other. Within a predetermined range where the shape of the return air path 21 is curved, an orthogonal flow is formed between the return air path 21 and the outside air path 22 between the straight outside air path 22. By making the return air path 21 close to the outside air path 22 by the bypass wall 23 and forming a cross flow, the efficiency of sensible heat exchange can be further improved. Further, the detour wall portion 23 can detour the return air path 21, and the effective length of the return air path 21, that is, the length from the inlet to the outlet of the return air path 21 can be made longer than that of the outside air path 22. Therefore, the amount of sensible heat recovered from the return air exhausted can be increased, and the efficiency of sensible heat exchange can be improved.

  The 1st humidifier 3 contains the 1st humidification part 31 and the 1st humidification valve 32, discharge | releases the water supplied from the humidification water container 5 mentioned later in the air from the 1st humidification part 31, and humidifies surrounding air Is to do. For example, the first humidifier 3 is a vaporizing type (dropping pervaporation type or moisture permeable membrane type) or water spray type humidifier.

  The form of the first humidifying unit 31 is appropriately determined according to the type of humidifier such as a vaporization type or a water spray type as described above. That is, the water vaporized in the air is discharged from the first humidifying unit 31 or is discharged in a mist form. Even when released in the form of a mist, the mist-like water is vaporized according to the saturated water vapor pressure of the surrounding air, and is generated when the air is humidified, that is, when the absolute humidity is increased and vaporized. The temperature of the air, that is, the ambient temperature is lowered by the heat of vaporization. The 1st humidification part 31 and the 1st humidification valve 32 are connected by the humidification water piping. The 1st humidification valve 32 is constituted by an electric valve or a solenoid valve, for example, and its opening and closing is controlled by controller 15 mentioned below.

  The second humidifier 4 includes a second humidifying unit 41 and a second humidifying valve 42. The 2nd humidifier 4 comprises the same structure as the 1st humidifier 3, for example, is a humidifier of a vaporization type (drop osmosis vaporization type or a moisture-permeable film type) or a water spray type. The second humidifying unit 41 has the same configuration as the first humidifying unit 31, and the second humidifying valve 42 has the same configuration as the first humidifying valve 32.

  The 1st humidification valve 32 and the 2nd humidification valve 42 are connected to each humidification water piping branched from the pump 51 for supplying humidification water. The pump 51 is connected to the humidifying water container 5 by a humidifying water pipe. By driving the pump 51, the water in the humidifying water container 5 is passed through the first humidifying valve 32 and the second humidifying valve 42. It is supplied to the first humidifying unit 31 and the second humidifying unit 41. That is, the first humidifier 3 and the second humidifier 4 share the humidified water container 5. Since the first humidifier 3 and the second humidifier 4 share the humidified water container 5, it is possible to reduce the storage location of water that tends to be a slime generation source.

  The humidified water container 5 is connected to a water supply source (not shown) via a water supply pipe and a water supply valve 54. The humidifying water container 5 is provided with a water level sensor 52 using a float or the like in order to detect the level of the stored humidified water, and when the water level exceeds a predetermined level, a drain pipe for draining, A drain valve 53 and a bypass path that bypasses the drain valve 53 are provided.

  The first humidifier 3 and the second humidifier 4 are provided in the exhaust path 13 with the sensible heat exchanger 2 interposed therebetween. That is, the return air humidified by the first humidifier 3 passes through the return air path 21 of the sensible heat exchanger 2 and flows out from the outlet of the return air path 21. The return air flowing out from the outlet of the return air path 21 is humidified by the second humidifier 4.

  As shown in FIG. 1, the first humidifying part 31 of the first humidifier 3 and the second humidifying part 41 of the second humidifier 4 are arranged in the exhaust path 13 within the outer peripheral surface of the sensible heat exchanger 2 and the exhaust path 13. It is provided between the peripheral surfaces. A partition plate 141 is provided between the outer peripheral surface of the sensible heat exchanger 2 and the inner peripheral surface of the exhaust passage 13, and the first humidifying unit 31, the second humidifying unit 41, and the sensible heat exchanger 2 are provided. The return air is prevented from bypassing from the gap between the outer peripheral surface of the exhaust gas and the inner peripheral surface of the exhaust passage 13. The partition plate 141 is provided at the approximate center in the exhaust direction in the sensible heat exchanger 2 and is provided so as to coincide with the extending direction of the bypass wall 23 described above in a side view. In ensuring the sealing performance by the partition plate 141, for example, the partition plate 141 is provided with holes corresponding to the first humidifying unit 31 and the second humidifying unit 41, and the first humidifying unit 31 and the second humidifying unit 41 are provided. It may be fitted into this hole and sealed.

  The first humidifying unit 31 is set with a direction (spraying direction) for releasing moisture toward the upstream side in the exhaust direction, that is, toward the inlet of the exhaust path 13 with respect to the partition plate 141. The second humidifying unit 41 is set in a direction (spraying direction) for releasing moisture toward the downstream side in the exhaust direction, that is, toward the outlet of the exhaust path 13 with respect to the partition plate 141. Accordingly, the return air flowing into the return air path 21 is humidified by the moisture released from the first humidification unit 31. The return air flowing out from the return air path 21 is humidified by the moisture released from the second humidifying unit 41.

  By arranging the first humidifying unit 31 and the second humidifying unit 41 in this way, the sensible heat exchanger 2 can be sandwiched in the exhaust path 13 by the first humidifying unit 31 and the second humidifying unit 41. Interposing the sensible heat exchanger 2 between the first humidifier 3 and the second humidifier 4 means between the first humidifier 31 of the first humidifier 3 and the second humidifier 41 of the second humidifier 4. Including the sensible heat exchanger 2 interposed therebetween.

  In this embodiment, although the 1st humidifier 3 included the 1st humidification part 31, and the 2nd humidifier 4 included the 2nd humidification part 41, it described as a form which shares the humidification water container 5, It is not limited. The 1st humidifier 3 may be comprised as a humidification unit in which the 1st humidification part 31 and the humidification water container 5 grade | etc., Were integrated, and the 2nd humidification device 4 is the 2nd humidification part 41 and the humidification water container 5. Etc. may be configured as a humidifying unit in which these are integrated. Alternatively, each of the first humidifier 3 and the second humidifier 4 may include a separate humidified water container 5.

  In the present embodiment, the sensible heat exchanger 2, the first humidifying unit 31, the second humidifying unit 41, the humidified water container 5, and the like are described as separate forms, but the present invention is not limited to this. The sensible heat exchanger 2, the first humidifying unit 31, the second humidifying unit 41, the humidified water container 5 and the like may be configured as, for example, a sensible heat exchange unit with a humidifying function in which these are integrated. Good. By adopting an integrated sensible heat exchange unit with a humidifying function, it is possible to simplify the work for placing the unit on the exhaust path 13 and the air supply path 14.

  A desiccant section 6 is provided on the downstream side of the second humidifying section 41 of the second humidifier 4 in the exhaust direction. The desiccant section 6 is provided so as to straddle the exhaust path 13 and the air supply path 14 in the same manner as the sensible heat exchanger 2. When one of the desiccant portions 6 is moved in a complementary manner to be positioned in the exhaust passage 13, the other is the two suction / desorption portions 61 located in the air supply passage 14 and the two suction / desorption portions 61 in a complementary manner. A switching unit 62 that moves and switches the adsorption / desorption in each of the adsorption / desorption units 61 is included.

  Each of the adsorption / desorption portions 61 is a desiccant member in which an adsorbent such as silica gel is applied or soaked on the surface of a path member having a plurality of fine honeycomb paths, for example. The adsorption / desorption part 61 adsorbs moisture in the air when the temperature is low, and desorbs (releases) the adsorbed moisture into the air when the temperature is high.

  Each of the suction / desorption parts 61 is arranged in parallel in the intake / exhaust direction, and is provided so as to move between the air supply path 14 and the exhaust path 13 by a switching part 62 configured by a motor or the like. As described above, each of the adsorption / desorption portions 61 moves in a complementary manner between the air supply path 14 and the exhaust path 13. For example, as shown in FIG. When the first adsorption / desorption portion 61 is located in the exhaust path 13, the other adsorption / desorption portion 61 is located in the air supply path 14.

  In the present embodiment, the desiccant portion 6 has been described as a configuration with two adsorption / desorption portions 61 moved in a complementary manner, but is not limited to this. The adsorption / desorption part 61 of the desiccant part 6 may be a desiccant rotor composed of, for example, a disk-shaped rotor. The desiccant rotor may be rotated to switch the part located in the exhaust path 13 and the part located in the air supply path 14 at a predetermined cycle. The adsorption / desorption part 61 itself is fixed, and the adsorption / desorption in the adsorption / desorption part 61 is switched by switching these paths to the desiccant part 6 by means of dampers provided before and after the air supply path 14 and the exhaust path 13. May be.

  A first heat exchanger 7 is provided upstream of the desiccant unit 6 in the air supply path 14. The first heat exchanger 7 includes a plurality of heat transfer tubes through which hot water supplied from the heat source unit 10 flows, and heat transfer fins provided so as to intersect the axial direction of the heat transfer tubes. The heat transfer pipe communicates with the hot water pipe from the heat source unit 10. The controller 15 described later opens and closes the first hot water inlet valve 71 provided in the hot water pipe on the inlet side of the heat transfer tube, whereby the hot water from the heat source unit 10 is cut off.

  A second heat exchanger 8 is provided downstream of the sensible heat exchanger 2 in the air supply path 14. The second heat exchanger 8 includes a plurality of heat transfer tubes through which hot water supplied from the heat source unit 10 flows, and heat transfer fins provided so as to intersect the axial direction of the heat transfer tubes. The heat transfer pipe communicates with the hot water pipe from the heat source unit 10. The controller 15 to be described later opens and closes the second hot water inlet valve 81 provided in the hot water pipe on the inlet side of the heat transfer tube, whereby the hot water from the heat source unit 10 is cut off.

  In the exhaust path 13, a third heat exchanger 9 is provided between the sensible heat exchanger 2 and the desiccant unit 6. The third heat exchanger 9 includes a plurality of heat transfer tubes through which hot water supplied from the heat source unit 10 flows, and heat transfer fins provided so as to intersect the axial direction of the heat transfer tubes. The heat transfer pipe communicates with the hot water pipe from the heat source unit 10. The controller 15 (described later) opens and closes a third hot water inlet valve 91 provided in the hot water pipe on the inlet side of the heat transfer tube, whereby hot water from the heat source unit 10 is cut off.

  The heat source unit 10 serving as a heat source for the first heat exchanger 7, the second heat exchanger 8, and the third heat exchanger 9 supplies hot water (for example, antifreeze liquid such as water or ethylene glycol) to the first heat exchanger 7 or the like. A hot water circuit including a hot water pipe for supplying and a heat source (not shown) is included.

  The hot water pipe forms a circuit for circulating hot water between the first heat exchanger 7, the second heat exchanger 8 and the third heat exchanger 9 as described above, and the first heat exchanger 7 and the second heat A branch pipe that branches to connect the exchanger 8 and the third heat exchanger 9 in parallel is included. In the hot water pipes on the inlet side of the first heat exchanger 7, the second heat exchanger 8, and the third heat exchanger 9, a first hot water inlet valve 71 and a second hot water inlet valve corresponding to each of these heat exchangers are provided. 81 and a third hot water inlet valve 91 are provided.

  The heat source includes, for example, a boiler or a heat pump, and may be a heat source that generates exhaust heat that can be used in a building in which the air conditioner 1 is installed. In another example, the heat source may include a solar panel and generate exhaust heat that can be used outside the building in which the air conditioner 1 is installed. Alternatively, the hot heat source may be a hybrid heat source that drives the boiler or the heat pump in an interpolating manner when the amount of heat is insufficient while preferentially using the heat source by the exhaust heat. In the present embodiment, the heat source unit 10 supplies hot water to the first heat exchanger 7 and the like, but is not limited thereto. The heat source unit 10 is composed of a heat pump unit including a compressor, and causes the compressed refrigerant to flow through the first heat exchanger 7 and the like, and functions as a radiator by condensing the refrigerant compressed by the first heat exchanger 7 and the like. It may be.

  The exhaust path 13 and the air supply path 14 are configured by, for example, a duct, a heat insulating member is provided on the outer peripheral surface of the duct, and heat insulation between the air outside the duct is ensured. Also good. In the present embodiment, the sensible heat exchanger 2 is described as being provided in a duct constituting the exhaust path 13 and the air supply path 14, but is not limited to this. As described above, for example, a sensible heat exchange unit with a humidifying function in which the sensible heat exchanger 2, the first humidifier 3, and the second humidifier 4 are integrated, and the unit is provided at the end of the duct. Also good. In this case, the return air path 21 and the outside air path 22 of the unit (sensible heat exchanger 2) constitute a part of the exhaust path 13 and the air supply path 14.

  In the exhaust path 13, an exhaust fan 11 is provided downstream of the desiccant unit 6. The exhaust fan 11 is, for example, a turbo fan, a sirocco fan, or a propeller fan. By rotating the exhaust fan 11, the return air from the room is exhausted to the outside. In the air supply path 14, an air supply fan 12 is provided upstream of the first heat exchanger 7. The air supply fan 12 is, for example, a turbo fan, a sirocco fan, or a propeller fan. By rotating the air supply fan 12, outside air from the outside is supplied indoors. The volume flow rate (air volume) in the supply and exhaust air is determined by the fan shape of each of the supply air fan 12 and the exhaust fan 11 and the rotation speed of the fan. This air volume may be variable by the controller 15 described later in accordance with, for example, the amount of sensible heat or latent heat exchanged between the return air and the outside air, or may be a constant air volume. . Furthermore, the arrangement of the exhaust fan 11 in the exhaust path 13 and the supply fan 12 in the supply path 14 can be changed as appropriate. Further, a plurality of fans 11 and 12 may be provided in the exhaust path 13 and the air supply path 14.

  Filters (not shown) are provided at the inlets of the exhaust passage 13 and the air supply passage 14, and dust floating in the outside air or inside air is captured by the filters.

  In the exhaust path 13 and the air supply path 14, a plurality of temperature sensors or humidity sensors (not shown) may be provided. By providing a temperature sensor or a humidity sensor upstream in the exhaust direction with respect to the inlet of the exhaust path 13, that is, the sensible heat exchanger 2, the temperature or humidity of the indoor air (inside air) can be detected. By providing a temperature sensor or humidity sensor at the inlet of the air supply path 14, that is, upstream of the first heat exchanger 7 in the air supply direction, the temperature or humidity of the outdoor air (outside air) can be detected. Furthermore, by providing a temperature sensor or a humidity sensor between the desiccant unit 6 and the sensible heat exchanger 2 in the air supply path 14, the temperature or humidity of the outside air conditioned by the desiccant unit 6 can be detected. . These sensors are communicably connected to a controller 15 described later.

  The air conditioner 1 configured as described above can be operated in a plurality of operation modes including cooling, heating, dehumidification, and humidification, and includes a controller 15 that controls the operation mode. The controller 15 outputs the control signal to drive the desiccant unit 6, the first humidifier 3 or the second humidifier 4, and the first heat exchanger 7, the second heat exchanger 8 or the third heat exchange. The device 9 is operated as a radiator. That is, based on the control signal from the controller 15, the switching unit 62 of the desiccant unit 6 is driven, the first humidifying valve 32 or the second humidifying valve 42 is opened, the first hot water inlet valve 71, the second hot water inlet valve 81 or The third hot water inlet valve 91 is opened and closed. Details of the configuration of the controller 15 will be described later.

  FIG. 2 is a schematic diagram showing one configuration of the sensible heat exchanger 2. The sensible heat exchanger 2 is provided with a rectangular shape in a side view and a longitudinal direction parallel to the air supply direction in a state where the exhaust passage 13 is connected upward and the air supply passage 14 is connected downward. Yes. As described above, the sensible heat exchanger 2 includes the U-shaped return air path 21, the straight outside air path 22, and the bypass wall portion 23 for bypassing the return air path 21.

  The inlet and outlet of the return air path 21 face the inner peripheral surface of the exhaust path 13, and the exhaust path 13 and the return air path 21 near the inlet are bent by approximately 90 °. Similarly, the return air path 21 and the exhaust path 13 in the vicinity of the outlet are bent by approximately 90 °.

  A first humidification section 31 is provided in the exhaust path 13 near the inlet of the return air path 21, and a second humidification section 41 is provided in the exhaust path 13 near the outlet of the return air path 21. In the exhaust path 13, a first humidification unit 31 is provided upstream of the sensible heat exchanger 2, and a second humidification unit 41 is provided downstream of the sensible heat exchanger 2. That is, the sensible heat exchanger 2 is interposed between the first humidifying unit 31 and the second humidifying unit 41. A partition plate 141 is provided between the first humidifying unit 31 and the second humidifying unit 41 in the exhaust path 13, and the return air bypasses the exhaust path 13 without passing through the sensible heat exchanger 2. To prevent that.

  The return air path 21 includes a return air mixing channel 24 that is provided near the top of the U-shaped path and in which the return air that has passed through each of the return air paths 21 is mixed. The return air mixing channel 24 is provided so as to be located outside the outside air path 22. The return air flowing in from the inlet of the return air path 21 passes through the return air mixing passage 24 located near the top of the U-shaped path, and then is divided again in the latter half of the return air path 21 to be returned. It flows out from the exit of the air path 21.

  The effective length of the return air path 21 is the sum of the lengths of the flow paths from the inlet of the return air path 21 to the return air mixing path 24 and from the return air mixing path 24 to the outlet of the return air path 21. In addition, the length is longer than the effective length (flow path length) of the outside air path 22 on a straight line. Thus, the efficiency of the sensible heat exchange between the return air and the outside air can be improved by making the return air path 21 U-shaped and making the effective length longer than the effective length of the outside air path 22. Moreover, the freedom degree of arrangement | positioning of the 1st humidification part 31 and the 2nd humidification part 41 in the vicinity of the entrance or exit of the return air path 21 can be improved.

  The moisture released from the first humidifying unit 31 humidifies the return air to increase the absolute humidity, and the heat of vaporization generated when the released moisture vaporizes reduces the temperature of the return air. The return air whose temperature has been lowered by the heat of vaporization flows into the sensible heat exchanger 2 from the inlet of the return air path 21, and the sensible heat is exchanged with the outside air flowing in from the outside air path 22.

  When the sensible heat is exchanged between the return air and the outside air in the sensible heat exchanger 2, the temperature of the outside air decreases and the temperature of the return air increases. Since the temperature of the return air rises, the saturated water vapor pressure of the return air also rises and the relative humidity decreases. Therefore, it is possible to suppress the occurrence of condensation in the return air path 21.

  The return air flowing out from the exit of the return air path 21 is humidified by the second humidification unit 41. That is, since the return air humidified by the second humidification unit 41 is the return air after passing through the sensible heat exchanger 2, even if the temperature of the return air decreases due to the heat of vaporization, the sensible heat exchanger 2 It is possible to prevent heat exchange with the outside air flowing through.

  FIG. 3 is an explanatory diagram (table) regarding the operation mode of the air conditioner 1 (during the hot water circuit). As described above, the air conditioner 1 functions as a ventilator that supplies outside air from the outside to the room while exhausting the inside air (returned air) conditioned in the air-conditioned space to the outside. Further, the air conditioner 1 is operated in a plurality of operation modes including cooling, dehumidification, humidification, and heating, and these operation modes are controlled by a controller 15 described later.

  When the operation mode of the air conditioner 1 is cooling, the controller 15 drives the first humidifier 3. By driving the first humidifier 3, the return air before passing through the sensible heat exchanger 2 is humidified, and the temperature of the return air is lowered by the heat of vaporization by the humidified water. The return air whose temperature has decreased flows into the sensible heat exchanger 2 through the return air path 21, and exchanges sensible heat with the outside air that flows into the sensible heat exchanger 2 through the outside air path 22. The return air path 21 and the outside air path 22 are provided so as to be in exchange with each other, and the temperature of the outside air that has flowed out of the outside air path 22 decreases to substantially the same temperature as the return air that flows into the return air path 21. . The air conditioner 1 performs the cooling operation by supplying the outside air thus cooled into the room that is the air-conditioned space.

  When the operation mode of the air conditioner 1 is dehumidification, the controller 15 operates the third heat exchanger 9 as a radiator and drives the desiccant unit 6. By operating the third heat exchanger 9 as a radiator, the return air passing through the third heat exchanger 9 is heated, and the temperature of the return air rises. The heated return air passes through the adsorption / desorption part 61 of the desiccant part 6 located on the exhaust path 13 side. The adsorption / desorption portion 61 located on the exhaust path 13 side rises in temperature due to the heated return air, and desorbs (releases) the absorbed moisture. The desorbed moisture is included in the return air and exhausted outside the room. Outside air passes through the adsorption / desorption part 61 located on the air supply path 14 side. The temperature of the outside air is lower than the temperature of the return air heated by the third heat exchanger 9. Therefore, the adsorption / desorption part 61 located on the air supply path 14 side adsorbs moisture from the outside air, and the absolute humidity of the outside air decreases. The air conditioner 1 performs the dehumidifying operation by supplying the outside air whose absolute humidity has been lowered into the living room.

  When the operation mode of the air conditioner 1 is humidification, the controller 15 operates the first heat exchanger 7 as a radiator and drives the second humidifier 4 and the desiccant unit 6. By driving the 2nd humidifier 4, the return air after passing the sensible heat exchanger 2 is humidified, and absolute humidity increases. The return air whose absolute humidity has increased passes through the adsorption / desorption portion 61 on the exhaust path 13 side. When passing, moisture contained in the return air is adsorbed by the adsorption / desorption portion 61 on the exhaust path 13 side. The outside air that has flowed into the air supply path 14 is heated by the first heat exchanger 7, and the heated outside air passes through the adsorption / desorption part 61 on the air supply side. When passing, the adsorption / desorption part 61 on the supply side desorbs (releases) the water part absorbed from the return air to the outside air when it is located on the exhaust side. That is, the moisture humidified to the return air by the second humidification unit 41 in the exhaust path 13 is absorbed by the desiccant part 6, and the desiccant part 6 desorbs the moisture absorbed from the return air to the outside air flowing in the outside air path and Increase absolute humidity. The air conditioner 1 performs the humidifying operation by supplying the outside air whose absolute humidity has increased in this way into the living room.

  When the operation mode of the air conditioner 1 is heating, the controller 15 operates the second heat exchanger 8 as a radiator. The air conditioner 1 performs a heating operation by supplying the outside air heated by the second heat exchanger 8 into the living room.

  As described above, the operation mode is roughly classified into heating or cooling for adjusting the temperature and dehumidification or humidifying for adjusting the humidity. Operation of the first humidifier 3, the second humidifier 4, the desiccant unit 6 included in the air conditioner 1, and the operation of the first heat exchanger 7, the second heat exchanger 8, and the third heat exchanger 9 as a radiator. Is controlled so as not to conflict between heating or cooling for adjusting the temperature and dehumidifying or humidifying for adjusting the humidity.

  When the operation mode is heating / humidification, the controller 15 operates the first heat exchanger 7 and the second heat exchanger 8 as a radiator and drives the second humidification unit 41 and the desiccant unit 6. When the operation mode is heating dehumidification, the controller 15 operates the second heat exchanger 8 and the third heat exchanger 9 as a radiator and drives the desiccant unit 6. When the operation mode is cooling humidification, the controller 15 operates the first heat exchanger 7 as a radiator and drives the first humidifying unit 31, the second humidifying unit 41, and the desiccant unit 6. When the operation mode is cooling dehumidification, the controller 15 operates the third heat exchanger 9 as a radiator and drives the first humidifying unit 31 and the desiccant unit 6. That is, the air conditioner 1 can perform an operation combining heating or cooling for adjusting temperature and dehumidifying or humidifying for adjusting humidity, and can perform heating humidification, heating dehumidification, cooling humidification, and cooling dehumidification. it can.

  FIG. 4 is an explanatory diagram (air diagram) regarding the state of outside air and return air when the operation mode is heating and humidification (humidification and heating). In FIG. 4, as an example of operating conditions of the air conditioner 1, the outside air temperature is 7 ° C. and the relative humidity is 85%, the inside air temperature is 21 ° C., and the relative humidity is 54%. FIG. 4 shows an air diagram. In FIG. 4, the eight portions in the air supply path 14 and the exhaust path 13 in the schematic diagram of the air conditioner 1 described in FIG. 1 are given the numbers from (1) to (8) at the center. is there. FIG. 3 shows an example of the states (dry bulb temperature and absolute humidity) of the return air from (1) to (3) and the outside air from (4) to (8).

  The operation mode of the air conditioner 1 is heating humidification (humidification and heating), and as described in FIG. 3, the controller 15 operates the first heat exchanger 7 and the second heat exchanger 8 as a radiator, The 2nd humidification part 41 and the desiccant part 6 are driven.

  The return air (1) flowing in from the inlet of the exhaust passage 13 is sensible heat exchanged with the outside air (6) by the sensible heat exchanger 2 and the temperature is lowered, and then humidified by the second humidifier 4 to increase the absolute humidity, It will be in the state of return air (2). The return air (2) is adsorbed and desorbed by the adsorbing / desorbing portion 61 on the exhaust path 13 side to reduce the absolute humidity, and is returned to the return air (3) state and exhausted to the outside. When passing through the adsorption / desorption part 61 on the exhaust path 13 side, the return air (3) is heated by the amount of heat held by the adsorption / desorption part 61.

  The outside air (4) flowing in from the inlet of the air supply path 14 is heated by the first heat exchanger 7 and the temperature rises to be in the state of the outside air (5). When the outside air (5) passes through the adsorption / desorption part 61 located on the supply path 14 side, the moisture adsorbed from the return air (2) when the adsorption / desorption part 61 is located on the exhaust path 13 side is desorbed. The outside air (5) is humidified and the absolute humidity increases. Due to the heat of vaporization generated when the adsorbed moisture is desorbed, the temperature of the outside air (5) is lowered to be in the state of the outside air (6). As the outside air (6) passes through the sensible heat exchanger 2, the temperature is increased by sensible heat exchange with the return air (1), and the outside air (7) becomes a state. The outside air (7) is heated by the second heat exchanger 8, the temperature rises, and the outside air (8) is brought into the room to be supplied into the room.

  In the present embodiment, the case where the operation mode is heating / humidification has been described. However, even when the operation mode is heating / humidification, cooling / humidification, or cooling / dehumidification, the controller 15 performs control as shown in FIG. Exchange of sensible heat or latent heat with the return air and temperature control of the outside air can be performed.

  FIG. 5 is a block diagram showing one configuration of the controller 15. FIG. 6 is a flowchart showing the processing procedure of the control unit 151 (during the hot water circuit).

  The controller 15 that controls the operation mode of the air conditioner 1 includes a control unit 151, a storage unit 152, and an input / output I / F 153, and is a remote controller, for example. The controller 15 is not limited to a remote controller configured exclusively for operating the air conditioner 1. For example, in a building where the air conditioner 1 is installed, another air conditioner or elevator installed in the building. It may be included in one function of the centralized control device for controlling the above.

  The controller 15 is connected to the first humidifying valve 32, the second humidifying valve 42, the desiccant unit 6 (switching unit 62), the first warm inlet valve, the second warm inlet valve, and the third warm temperature via the input / output I / F 153. An actuator such as an inlet valve, a water level sensor 52, various sensors such as a temperature sensor (not shown) or a humidity sensor (not shown), and the heat source unit 10 are connected.

  The control unit 151 is configured by a CPU (Central Processing Unit), an MPU (Micro Processing Unit), or the like, and reads out and executes programs and data stored in advance in the storage unit 152, thereby performing various control processes and operations. Processing is performed.

  The storage unit 152 includes a volatile memory element such as a RAM (Random Access Memory) or a nonvolatile memory element such as a ROM (Read Only Memory), an EEPROM (Electrically Erasable Programmable ROM), or a flash memory. A control program and data to be referred to during processing are stored in advance. As shown in FIG. 3, the storage unit 152 stores a plurality of operation modes performed by the air conditioner 1 and an operation mode of an actuator to be driven corresponding to each operation mode.

  The input / output I / F 153 is a group of interfaces for connecting serial cables from the above-described actuators, sensors, etc., and connects the control unit 151 and these actuators, sensors, etc. via an internal bus in the controller 15. Connecting.

  The control part 151 of the controller 15 performs the following processes, when the information regarding an operation mode is input from the input part (not shown) via input / output I / F153, for example. The return air fan and the air supply fan 12 are rotated based on control by the controller 15. Alternatively, the return air fan and the air supply fan 12 may rotate independently of the control by the controller 15. Hereinafter, a description will be given with reference to FIG.

  The control unit 151 acquires the operation mode (S10). The control part 151 acquires the information regarding the operation mode input from the input part (not shown). The control unit 151 determines whether the operation mode is heating or cooling (S11). The control unit 151 refers to the information related to the acquired operation mode, and determines whether or not the information includes instructions for instructing heating or cooling.

  When the operation mode is heating (S11: heating), the control unit 151 operates the second heat exchanger 8 as a radiator (S111). The 2nd heat exchanger 8 is connected with the heat source unit 10 which supplies warm water by the warm water piping, and the control part 151 outputs a control signal so that the 2nd warm water inlet valve 81 provided in the warm water piping may be opened. . When the second hot water inlet valve 81 is opened, hot water flows into the second heat exchanger 8, the second heat exchanger 8 operates as a radiator, and the outside air that has passed through the second heat exchanger 8 is heated. .

  When the operation mode is cooling (S11: cooling), the control unit 151 drives the first humidifier 3 (S12). The control unit 151 outputs a control signal so as to open the first humidification valve 32 of the first humidifier 3. When the first humidifying valve 32 is opened, water is discharged from the first humidifying unit 31 of the first humidifier 3 to perform humidification, and the return air is cooled by the heat of vaporization by the discharged water.

  After execution of the processing of S11 and S12, or when the acquired information does not include the content for instructing heating or cooling (S11: no specification of heating or cooling), the control unit 151 is dehumidifying or humidifying. It is determined whether there is (S13). The control unit 151 refers to the information regarding the acquired operation mode, and determines whether or not the information instructing dehumidification or humidification is included in the information.

  When the operation mode is dehumidification (S13: dehumidification), the control unit 151 operates the third heat exchanger 9 as a radiator (S131). The control unit 151 outputs a control signal so as to open the third hot water inlet valve 91 provided in the hot water pipe. When the third hot water inlet valve 91 is opened, hot water flows into the third heat exchanger 9, the third heat exchanger 9 operates as a radiator, and the return air that has passed through the third heat exchanger 9 is heated. The

  When the operation mode is humidification (S13: humidification), the control unit 151 outputs a control signal to open the second humidification valve 42 of the second humidifier 4 (S14). Water is discharged from the second humidifier 41 of the second humidifier 4 to perform humidification, and the absolute humidity of the return air increases. The control unit 151 operates the first heat exchanger 7 as a radiator (S15). The controller 151 outputs a control signal so as to open the first hot water inlet valve 71 provided in the hot water pipe. When the first hot water inlet valve 71 is opened, hot water flows into the first heat exchanger 7, the first heat exchanger 7 operates as a radiator, and the outside air that has passed through the first heat exchanger 7 is heated. .

  After executing the process of S131 or S15, the control unit 151 drives the desiccant unit 6 (S16). The control unit 151 drives the switching unit 62 of the desiccant unit 6 to output a control signal so that the respective adsorption / desorption units 61 move complementarily between the air supply path 14 and the exhaust path 13.

  After executing the process of S16, or when the acquired information does not include content for instructing dehumidification or humidification (S13: no designation of dehumidification or humidification), the control unit 151 ends the process. In S13, when there is no designation of dehumidification or humidification, the desiccant unit 6 may be driven by executing S16.

  Thus, the control unit 151 can perform heating, cooling, dehumidification, or humidification operation based on the input operation mode. The first heat exchanger 7, the second heat exchanger 8, the third heat exchanger 9, and the first heat exchanger 7 that are driven or operated between a temperature adjustment operation that performs heating or cooling and a humidity adjustment operation that performs dehumidification or humidification. The control unit 151 drives or operates the first heat exchanger 7 and the like so that the control of the humidifier 3, the second humidifier 4, and the desiccant unit 6 does not conflict. Therefore, it is possible to perform an operation in which the temperature adjustment operation and the humidity adjustment operation are arbitrarily combined. Therefore, the control unit 151 causes the air conditioner 1 to perform heating operation, cooling operation, humidification operation, dehumidification operation, heating humidification operation, heating dehumidification operation, cooling humidification operation, cooling dehumidification operation, and the supply fan 12 and the exhaust fan 11 only. Driven ventilation operation can be performed.

  The first humidifier and the second humidifier are provided in the exhaust path with at least a part of the sensible heat exchanger interposed therebetween. Therefore, the sensible heat amount of the return air exchanged with the outside air by the sensible heat exchanger can be varied while humidifying by either the first humidifier or the second humidifier.

  The desiccant part is provided downstream of the second humidifier in the exhaust direction. Therefore, the desiccant part can adsorb the moisture released from the return air by the second humidifier, desorb the moisture to the outside air, and efficiently supply the moisture to the air-conditioned space.

  Even when the second humidifier is humidified during the heating operation, the temperature of the outside air supplied to the air-conditioned space is lowered by the heat of vaporization accompanying the humidification because the second humidifier is provided in the exhaust path. Can be suppressed.

(Embodiment 2)
FIG. 7 is a schematic diagram illustrating a configuration example (a cold / hot water circuit) of the air conditioner 1 according to the second embodiment. FIG. 8 is an explanatory diagram (table) relating to the operation mode (in the cold water circuit) of the air conditioner 1. In the air conditioner 1 according to the second embodiment, the heat source unit 10 includes a hot heat source for supplying hot water and a cold heat source for supplying cold water, and the first heat exchanger 7, the second heat exchanger 8, and The third heat exchanger 9 is different from the first embodiment in that a hot water pipe and a cold water pipe are connected.

  The heat source unit 10 includes a hot water circuit configured by a hot water pipe and a heat source (not shown) for supplying hot water to the first heat exchanger 7, the second heat exchanger 8, and the third heat exchanger 9. And a chilled water circuit configured to include a chilled water pipe for supplying chilled water and a cold heat source (not shown).

  As in the first embodiment, the heat source may be a boiler, a heat pump, a heat source by exhaust heat, or a hybrid heat source by a combination thereof. The cold heat source includes a heat pump. Alternatively, the heat source unit 10 may be a cold / hot water simultaneous extraction type heat pump chiller in which a warm heat source and a cold heat source are integrally configured. The warm heat source may be a cold / warm water simultaneous extraction type unit using a Peltier element. The heat source unit 10 can exchange heat between the hot water flowing (circulating) in the hot water circuit and the cold water flowing (circulating) in the cold water circuit so that the difference in enthalpy between the hot water and cold water can be recovered and used. It may be.

  From the heat source of the heat source unit 10, two hot water pipes that extend to and return to the first heat exchanger 7, the second heat exchanger 8, and the third heat exchanger 9 are extended as in the first embodiment. Has been. The 1st heat exchanger 7, the 2nd heat exchanger 8, and the 3rd heat exchanger 9 are connected in parallel with the warm heat source of heat source unit 10 by the branch pipe provided in the warm water piping.

  In the hot water piping on the inlet side of each of the first heat exchanger 7, the second heat exchanger 8, and the third heat exchanger 9, the first hot water inlet valve 71 and the second hot water inlet valve 81 are provided as in the first embodiment. And the 3rd warm water inlet valve 91 is provided. The hot water piping on the outlet side of each of the first heat exchanger 7, the second heat exchanger 8, and the third heat exchanger 9 includes a first hot water outlet valve 72, a second hot water outlet valve 82, and a third hot water outlet valve. 92 is provided. The hot water is supplied to and disconnected from these heat exchangers by opening and closing the hot water inlet valve and the hot water outlet valve.

  Two cold water pipes extending from the cold heat source of the heat source unit 10 to the first heat exchanger 7, the second heat exchanger 8, and the third heat exchanger 9 and serving as a return path are extended. The 1st heat exchanger 7, the 2nd heat exchanger 8, and the 3rd heat exchanger 9 are connected in parallel with the cold heat source of the heat source unit 10 by the branch pipe provided in cold water piping.

  The chilled water piping on the inlet side of each of the first heat exchanger 7, the second heat exchanger 8 and the third heat exchanger 9 includes a first chilled water inlet valve 73, a second chilled water inlet valve 83 and a third chilled water inlet valve. 93 is provided. The chilled water pipes on the outlet sides of the first heat exchanger 7, the second heat exchanger 8, and the third heat exchanger 9 include a first chilled water outlet valve 74, a second chilled water outlet valve 84, and a third chilled water outlet valve, respectively. 94 is provided. The supply and disconnection of cold water to these heat exchangers is performed by opening and closing the cold water inlet valve and the cold water outlet valve.

  As in the first embodiment, the first heat exchanger 7, the second heat exchanger 8, and the third heat exchanger 9 operate as heaters by opening the hot water inlet valve and the hot water outlet valve, respectively. In addition, when these heat exchangers operate | move as a heater, it cannot be overemphasized that the cold water inlet valve and cold water outlet valve of these heat exchangers are closed. The 1st heat exchanger 7, the 2nd heat exchanger 8, and the 3rd heat exchanger 9 operate | move as a heat absorber, when each chilled water inlet valve and a chilled water outlet valve are opened. In addition, when these heat exchangers operate | move as a heat sink, it cannot be overemphasized that the hot water inlet valve and hot water outlet valve of these heat exchangers are closed.

  When the first heat exchanger 7, the second heat exchanger 8 and the third heat exchanger 9 are operated as a heater or a heat absorber, any one of the heat exchanges is performed by opening and closing these valves corresponding to the respective heat exchanges. The heater can be operated as a heater and the other heat exchanger can be operated as a heat sink.

  In this embodiment, in order to operate these heat exchangers as heaters or heat absorbers, the hot water pipes and the cold water pipes are provided with valves at the inlet and outlet of these heat exchangers, but the present invention is not limited to this. At the inlet and outlet of these heat exchangers, a three-way valve is provided at a location where the hot water pipe and the cold water pipe are joined, and by switching the three-way valve, these heat exchangers are used as heaters or heat absorbers. Also good.

  In the second embodiment, as shown in FIG. 8, compared to the first embodiment, the first heat exchanger 7, the second heat exchanger 8, and the third heat exchanger 9 are operated as heat sinks. A mode in which the valve and the cold water outlet valve are opened (ON) is added.

  When the operation mode of the air conditioner 1 is cooling, the controller 15 drives the first humidifier 3 and further operates the second heat exchanger 8 as a heat absorber. In addition to driving the first humidifier 3 as in the first embodiment, by operating the second heat exchanger 8 as a heat absorber, the outside air cooled by the sensible heat exchanger 2 is further subjected to the second heat exchange. Cooled by the vessel 8. Therefore, the cooling capacity can be improved.

  When the operation mode of the air conditioner 1 is dehumidification, the controller 15 operates the third heat exchanger 9 as a radiator, drives the desiccant unit 6, and further operates the first heat exchanger 7 as a heat absorber. By operating the first heat exchanger 7 as a heat absorber, the outside air flowing into the air supply path 14 is cooled, and the adsorption of moisture by the adsorption / desorption portion 61 of the desiccant portion 6 is promoted by the outside air having a low temperature. Can do. Therefore, the absolute humidity of the outside air that has passed through the adsorption / desorption portion 61 can be further reduced, and the dehumidifying ability can be improved.

  When the operation mode of the air conditioner 1 is humidification, the controller 15 operates the first heat exchanger 7 as a radiator, drives the second humidifier 4 and the desiccant unit 6, and further absorbs the third heat exchanger 9. Operate as a vessel. By using the heat recovered by flowing cold water to the third heat exchanger 9 and flowing hot water from the heat source unit 10 to the first heat exchanger 7, the humidifying capacity can be improved. When the operation mode of the air conditioner 1 is heating, it is the same as in the first embodiment.

  In the second embodiment, each of the first heat exchanger 7, the second heat exchanger 8, and the third heat exchanger 9 can be independently operated as a radiator or a heat absorber. Therefore, by operating the first heat exchanger 7, the second heat exchanger 8, or the third heat exchanger 9 as a heat absorber according to the operation mode, the air conditioning capability can be improved as described above.

  As in the first embodiment, the first humidifier 3, the second humidifier 4, the driving of the desiccant unit 6, the radiator of the first heat exchanger 7, the second heat exchanger 8, and the third heat exchanger 9 or The operation as the heat absorber is controlled so as not to conflict between heating or cooling for adjusting the temperature and dehumidification or humidifying for adjusting the humidity. Therefore, as in the first embodiment, the air conditioner 1 can be operated by combining heating or cooling for temperature adjustment and dehumidification or humidification for humidity adjustment. Heating humidification, heating dehumidification, cooling humidification, And cooling dehumidification can be performed.

(Modification 1)
FIG. 9 is a schematic diagram showing one configuration of the sensible heat exchanger 2 according to Modification 1 (the first humidifying unit 31 is in the middle). The first humidifier 3 of Modification 1 is different from that of the first embodiment in that the first humidifier 31 is provided in the return air mixing flow path 24.

  In the sensible heat exchanger 2 of Modification 1, a return air mixing flow path 24 is provided in the vicinity of the top of the U-shaped path in the return air path 21 as in the first embodiment. The first humidifying unit 31 of the first humidifier 3 is provided in the return air mixing channel 24. That is, the first humidifying unit 31 of the first humidifier 3 is provided in the middle of the return air path 21 (inside the sensible heat exchanger 2) that is a part of the exhaust path 13. The first humidifying unit 31 is provided with its spray direction directed toward the inlet of the return air path 21.

  By providing the first humidifying unit 31 in the return air mixing channel 24, the distance between the first humidifying unit 31 and the inlet of the exhaust path 13 can be increased, and the water sprayed from the first humidifying unit 31 is exhausted. It is possible to prevent entry into the room beyond the entrance of the path 13.

  Since the spray direction of the first humidifying unit 31 is directed to the inlet of the return air path 21, the vaporization heat generated by the humidified water is efficiently humidified with respect to the return air flowing in from the inlet of the return air path 21. Thus, the temperature of the return air can be lowered.

  Thus, even when the first humidifying unit 31 is provided in the return air mixing flow path 24, a part of the sensible heat exchanger 2 is interposed by the first humidifying unit 31 and the second humidifying unit 41, By controlling the driving of the first humidifying unit 31 and the second humidifying unit 41, humidification and cooling can be performed efficiently.

(Modification 2)
FIG. 10 is a schematic diagram illustrating one configuration of the sensible heat exchanger 2 according to Modification 2 (two first humidifying units 31). The first humidifier 3 of Modification 2 is different from the first embodiment in that it includes two first humidifiers 31.

  The first humidifier 3 includes two first humidifiers 31. Of these two first humidifying sections 31, the first humidifying section 31 on the upstream side in the exhaust direction is provided at the same position as in the first embodiment. The other first humidifying unit 31 on the downstream side in the exhaust direction is provided with the return air mixing channel 24 as in the first modification.

  The return air that has been humidified by the first humidification unit 31 on the upstream side and whose absolute humidity has increased is subjected to sensible heat exchange with the outside air in the first half of the return air path 21, and the temperature rises. Increasing the relative humidity decreases. In this state, by further humidifying by the first humidifying unit 31 on the downstream side, the temperature of the return air can be lowered by the heat of vaporization by the humidified moisture, and the cooling capacity can be improved.

(Modification 3)
FIG. 11 is a schematic diagram showing one configuration of the sensible heat exchanger 2 according to Modification 3 (cross flow). The sensible heat exchanger 2 of Modification 3 is different from the first embodiment in that a counter current is formed by the linear return air path 21 and the outside air path 22.

  The sensible heat exchanger 2 has a substantially square shape in a side view, and is provided with a straight return air path 21 and an outside air path 22 so as to connect the opposing surfaces. The return air path 21 and the outside air path 22 are provided so as to intersect at approximately 90 °, thereby forming a cross flow between the return air path 21 and the outside air path 22 due to the return air and the outside air.

  The air supply path 14 and the exhaust path 13 are disposed corresponding to the inlet and outlet of the return air path 21 and the outside air path 22, and the supply path 14 and the exhaust path 13 are separated from the sensible heat exchanger 2. The positional relationship is changed. Two opposite corners of the sensible heat exchanger 2 are in contact with and sealed against the inner wall surfaces of the exhaust path 13 and the air supply path 14, and return air and exhaust air between the exhaust path 13 and the air supply path 14. The outside air is prevented from mixing.

  The return air that has flowed in from the inlet of the return air path 21 located on the upper right side of the page flows out from the outlet of the return air path 21 located on the lower left side. The outside air that has flowed in from the inlet of the outside air path 22 located at the upper left flows out from the outlet of the outside air path 22 located at the lower right. The first humidifier 31 of the first humidifier 3 is provided in the vicinity of the inlet of the return air path 21, and the second humidifier 41 of the second humidifier 4 is provided in the vicinity of the outlet of the return air path 21. It has been.

  In this way, by using the sensible heat exchanger 2 that forms a counter current exchange with the straight return air path 21 and the outside air path 22, the efficiency of the sensible heat exchange between the return air and the outside air is improved. Can do.

(Modification 4)
FIG. 12 is a schematic diagram showing one configuration of the sensible heat exchanger 2 according to Modification 4 (two cross flows). The sensible heat exchanger 2 of Modification 4 is provided with a return air mixing channel 24 and an outside air mixing channel 25 in the return air path 21 and the outside air path 22 at positions that are half the effective lengths of these paths. Thus, the third modification is different from the third modification.

  The sensible heat exchanger 2 of Modification 4 is configured by arranging two sensible heat exchangers 2 substantially the same as the sensible heat exchanger 2 of Modification 3 along the intake / exhaust direction. Similar to the sensible heat exchanger 2 of the third modification, the two opposite corners are in contact with and sealed against the inner wall surfaces of the exhaust path 13 and the air supply path 14, and between the exhaust path 13 and the air supply path 14. Prevents the return air and outside air from mixing.

  The return air path 21 and the outside air path 22 are linearly provided as in the third modification. A return air mixing flow path 24 is provided between the first half and the second half of the return air path 21, and the return air path 21 is V-shaped by the first half and the second half thereof. An outside air mixing flow path 25 is provided between the front half and the rear half of the outside air path 22, and the outside air path 22 has an inverted V shape by the front half and the latter half. The first half of the return air path 21 and the second half of the outside air path 22 form an alternating current. The second half of the return air path 21 and the first half of the outside air path 22 form an alternating current.

  The return air that has flowed in from the inlet of the return air path 21 located on the upper right side of the paper passes through the return air mixing passage 24 located in the lower center and flows out from the outlet of the return air path 21 located on the upper left. The outside air that has flowed in from the inlet of the outside air path 22 located on the lower left side of the paper passes through the outside air mixing passage 25 located on the center and flows out from the outlet of the outside air path 22 located on the lower right side. The first humidifier 31 of the first humidifier 3 is provided in the return air mixing flow path 24. The second humidifier 41 of the second humidifier 4 is provided in the vicinity of the outlet of the return air path 21.

  Thus, by forming the return air path 21 and the outside air path 22 via the return air mixing flow path 24 and the outside air mixing flow path 25, the positional relationship between the air supply path 14 and the exhaust path 13 with respect to the sensible heat exchanger 2. Can be the same.

(Modification 5)
FIG. 13 is a schematic diagram showing one configuration of the sensible heat exchanger 2 according to Modification 5 (two orthogonal flows and the first humidifying unit 31 is in the middle). The first humidifier 3 of Modification 5 is different from Modification 4 in that the first humidification unit is provided in the vicinity of the inlet of the return air path 21. The sensible heat exchanger 2 of Modification 5 has the same configuration as the sensible heat exchanger 2 of Modification 4.

  The first humidifying unit 31 of the first humidifier 3 of Modification 5 is provided in the vicinity of the inlet of the return air path 21. By providing the 1st humidification part 31 in the vicinity of the entrance of the return air path 21, the return air humidified by the 1st humidification part 31 and the temperature fell flows in into the return air path 21, Therefore Sensible heat exchange with external air Can be performed efficiently.

(Modification 6)
FIG. 14 is a schematic diagram illustrating one configuration of the sensible heat exchanger 2 according to Modification 6 (two crossflows and two first humidifying units 31). The first humidifier 3 of Modification 6 is different from Modification 4 in that it includes two first humidification units 31. The sensible heat exchanger 2 of Modification 6 has the same configuration as the sensible heat exchanger 2 of Modification 4.

  The first humidifier 3 of Modification 6 includes two first humidifiers 31. The first humidifying unit 31 located upstream in the exhaust direction is provided in the vicinity of the inlet of the return air path 21. The first humidifying unit 31 located downstream in the exhaust direction is provided in the return air mixing channel 24. By providing the two first humidifying sections 31 in the vicinity of the inlet of the return air path 21 and the return air mixing flow path 24 in this way, the cooling capacity can be improved as in the second modification shown in FIG. it can.

(Modification 7)
The air conditioner 1 shown in FIG. 1 or FIG. 7 includes a configuration that stores water only in the exhaust path 13. In other words, since the exhaust path 13 is provided with all the structures that are highly likely to generate slime, the possibility that slime is generated in the air supply path 14 can be reduced. Therefore, the influence on the air-conditioned space by the slime can be reduced.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Sensible heat exchanger 21 Return air path 22 Outside air path 23 Detour wall part 24 Return air mixing flow path 25 Outside air mixing flow path 3 1st humidifier 31 1st humidification part 32 1st humidification valve 4 2nd humidifier 41 2nd humidification part 42 2nd humidification valve 5 Humidification water container 51 Pump 52 Water level sensor 53 Drain valve 54 Water supply valve 6 Desiccant part 61 Adsorption / desorption part 62 Switching part 7 1st heat exchanger 71 1st hot water inlet valve 72 1st Hot water outlet valve 73 First cold water inlet valve 74 First cold water outlet valve 8 Second heat exchanger 81 Second hot water inlet valve 82 Second hot water outlet valve 83 Second cold water inlet valve 84 Second cold water outlet valve 9 Third heat exchange 91 Third hot water inlet valve 92 Third hot water outlet valve 93 Third cold water inlet valve 94 Third cold water outlet valve 10 Heat source unit 11 Exhaust fan 12 Supply air fan 13 Exhaust path 14 Supply air path 141 Partition plate 15 Controller 151 Control 152 storage unit 153 input-output I / F

Claims (8)

An air supply path for supplying outside air to the air-conditioned space;
An exhaust path for exhausting the return air from the air-conditioned space;
A sensible heat exchanger that exchanges sensible heat between the outside air and the return air;
A desiccant part that adsorbs moisture from one air between the outside air and the return air, and desorbs the adsorbed moisture to the other air;
A first humidifier disposed upstream or inside the sensible heat exchanger in the exhaust path;
An air conditioner comprising: a second humidifier disposed upstream of the desiccant part in the exhaust path. The first humidifier and the second humidifier are provided with at least a part of the sensible heat exchanger interposed therebetween,
2. The air conditioner according to claim 1, wherein the desiccant part is provided downstream of the second humidifier in the exhaust direction. The sensible heat exchanger includes a return air path through which exhausted return air passes, and an outside air path through which supplied outside air passes,
The air conditioner according to claim 1 or 2, wherein an effective length of the return air path is longer than an effective length of the outside air path. The sensible heat exchanger includes a return air path through which the exhausted return air passes, an outside air path through which the supplied outside air passes, and a bypass wall portion that bypasses the outside air path and approaches the return air path. The air conditioner according to any one of claims 1 to 3, wherein the air conditioner is included. The sensible heat exchanger includes a return air path through which exhausted return air passes, and an outside air path through which supplied outside air passes,
The air conditioner according to any one of claims 1 to 4, wherein at least a part of the return air path and the outside air path are provided so as to have a cross flow. A control unit that controls a plurality of operation modes including a humidification operation and a cooling operation,
The controller is
When the operation mode is the humidification operation, the second humidifier is driven,
The air conditioner according to any one of claims 1 to 5, wherein when the operation mode is the cooling operation, the first humidifier is driven. A first heat exchanger provided in the air supply path for exchanging heat with outside air before passing through the desiccant part;
A second heat exchanger provided in the air supply path for exchanging heat with outside air after passing through the sensible heat exchanger;
The air conditioning according to any one of claims 1 to 6, further comprising: a third heat exchanger that is provided in the exhaust path and exchanges heat with the return air before passing through the desiccant unit. Machine. A control unit that controls a plurality of operation modes including humidification operation, heating operation and dehumidification operation,
The controller is
When the operation mode is the humidification operation, the first heat exchanger is operated as a radiator,
When the operation mode is the heating operation, the second heat exchanger is operated as a radiator,
The air conditioner according to claim 7, wherein when the operation mode is the dehumidifying operation, the third heat exchanger is operated as a radiator.