JP6376890B2 - Desiccant block device and desiccant air conditioner - Google Patents

Description

  The present invention relates to a desiccant block device and a desiccant air conditioner, and relates to efficient use of a desiccant block and return air.

  In this type of technology, desiccant blocks and total heat exchangers are used to ventilate the return air and outside air in buildings and houses, etc., and the sensible heat (temperature) and latent heat (the total heat of air conditioning energy lost by ventilation) Humidity) is exchanged and recovered between the return air and the outside air.

  For example, in Patent Document 1, outside air passes through the desiccant rotor after passing through the total heat exchanger and is supplied, and return air passes through the desiccant rotor and then exhausts through the total heat exchanger. In the total heat exchanger, total heat exchange is performed between the outside air and the return air. In the desiccant rotor, the outside air is dehumidified by the adsorption or sorption of moisture on one side that contacts the outside air, and the other side contacts the return air. The return air is humidified by desorption of moisture on the side.

  An example of switching means between outside air and return air that ventilates a stationary desiccant block is disclosed in Patent Document 2. In Patent Document 2, a sorption switching unit is provided that switches between a sorption state in which the desiccant block is connected to the outside air path and a regeneration state in which the desiccant block is connected to the return air path. By doing so, the outside air flowing into the desiccant block and the return air are switched.

  Alternatively, in Patent Document 3, the dehumidifying / humidifying element (desiccant block) has a plurality of air passages, and the air flow is formed in a direction perpendicular to the rotation axis of the dehumidifying / humidifying elements. The dehumidifying / humidifying element is intermittently rotated or reciprocated by 90 ° around the rotation axis, thereby switching the state where the ventilation path is on the processing side and the state where it is on the regeneration side.

Patent 4475823 JP2013-155941A Patent 3860374

  When a cylindrical desiccant rotor is used as the desiccant portion as in the configuration of Patent Document 1 described above, since the desiccant rotor is a true circle, the air conditioner having an air passage having a rectangular cross section is effective. The flow passage area is reduced, and a wasteful portion is generated in the air passage.

  Furthermore, in Patent Document 1, after the return air regenerates the desiccant rotor, it flows into the total heat exchanger in a high humidity state including the moisture desorbed from the desiccant rotor. Perform total heat exchange. For this reason, there has been a problem that the humidity difference between the return air and the outside air is reduced, and the amount of latent heat exchange in the total heat exchanger is reduced.

  When a stationary desiccant block is used as in the configuration of Patent Document 2, a damper is required for each flow path as a means for switching the flow path, and a plurality of dampers and a plurality of dampers that open and close each damper are driven. A drive device (damper motor) is required, and there is a problem that the device is complicated as a whole.

  In Patent Document 3, when switching the air passage of the desiccant block, in the summer, the upstream side opening of the air passage connected to the processing side (outside air side) of the desiccant block is on the regeneration side (return air side) even after the switching operation. It becomes an upstream opening to be connected. For this reason, outside air and return air flow in the same ventilation direction in the air flow path of the desiccant block.

  In the air passage connected to the processing side, the amount of moisture absorbed or sorbed from the outside air increases on the upstream side of the air passage and decreases on the downstream side of the air passage. When the return air flows through this ventilation path in parallel with the outside air, the return air, which is the regeneration air, flows from the side with the higher moisture absorption amount to the side with the lower moisture absorption amount, and a large amount is generated at the inlet side of the ventilation channel. The return air that has absorbed the moisture comes into contact with a portion having a small amount of moisture absorption on the outlet side of the air passage.

  In general, the ability of return air to absorb moisture decreases as the humidity difference between the outside air and return air decreases, and the operation of removing moisture from the desiccant block results in a humidity difference between the desiccant block humidity and the return air humidity. As it gets smaller, the difficulty increases.

For this reason, the configuration in which the outside air and the return air are ventilated in the same direction in the air flow path of the desiccant block includes a structural factor that reduces the regeneration efficiency of the desiccant block.
The present invention solves the above-described problems, and a desiccant block device that can increase the regeneration efficiency of the desiccant block, and air that can increase the amount of latent heat exchange in the total heat exchanger without a complicated structure. The purpose is to provide a harmony machine.

In order to solve the above problems, the desiccant block device of the present invention is interposed between the dehumidification target air path and the regeneration air path in the air conditioner , and the flow direction of the dehumidification target air path and the regeneration air path is It has a plurality of desiccant portions provided so as to be rotatable around the axis in the direction orthogonal to each other, and the plurality of desiccant portions have a columnar shape with a regular tetragonal cross section that changes integrally by a rotation operation around the axis, When the air passage changes into a first posture state where the air passage communicates with the dehumidification target air path and a second posture state where the air passage communicates with the regeneration air passage , and at least one desiccant part is in the first posture state, When at least one other desiccant part is in the second posture state, and when changing from the first posture state to the second posture state, the upstream forming the air inlet of the air passage connected to the dehumidification target air path in the first posture state Side opening is first Characterized in that the downstream opening which forms the air outlet of the air passage in posture.

The desiccant air conditioner of the present invention supplies outside air into the room, becomes a dehumidifying air path in the summer, exhausts the outside air path that becomes the regeneration air path in the winter, and the indoor return air, and regenerates in the summer It has an air path, a return air path that becomes an air path to be dehumidified in winter, and a desiccant block device that communicates with the outside air path and the return air path. The desiccant block device is interposed between the outside air path and the return air path, It has a plurality of desiccant parts rotatably provided around the axis in the direction orthogonal to the flow direction of the outside air path and the return air path, and the plurality of desiccant parts are transformed together by a rotation operation around the axis. to cross without the square pillar-shaped, and the vicissitudes into a first posture state communicating with the dehumidified air passage ventilation passage, and a second orientation state air passage communicates with the regeneration air passage, at least one desiccant Is in the first posture state, the other at least one desiccant part is in the second posture state, and is connected to the dehumidification target air path in the first posture state when changing from the first posture state to the second posture state. The upstream opening that forms the air inlet of the vent passage is the downstream opening that forms the air outlet of the vent passage in the second posture state.

The desiccant air conditioner of the present invention supplies outside air into the room, becomes a dehumidifying air path in the summer, exhausts the outside air path that becomes the regeneration air path in the winter, and the indoor return air, and regenerates in the summer It has an air path, a return air path that becomes a dehumidifying air path in winter, a desiccant block device and a total heat exchanger that communicate with the outside air path and the return air path,
The desiccant block device includes a first posture state in which the air passage is connected between the outside air path and the return air path, and the air passage communicates with the air path to be dehumidified by the rotation operation around the shaft center, and the air passage becomes the air path for regeneration. Having a plurality of desiccant portions that change to the communicating second posture state;
When the at least one desiccant part is in the first posture state, at least one other desiccant part is in the second posture state, and when the plurality of desiccant parts are in the second posture state, The upstream opening that forms the air inlet of the air passage connected to the air path to be dehumidified in the first posture state becomes the downstream opening that forms the air outlet of the air passage in the second posture state,
The total heat exchanger is located on the upstream side of the desiccant block device in both the outside air route and the return air route, and the outside air and the return air that have not passed through the desiccant block device totally exchange heat,
The outside air path and the return air path have a bypass section that bypasses the total heat exchanger .

  As described above, according to the present invention, the air to be dehumidified passes through the air passage in the desiccant portion, so that the upstream side moisture absorption is higher than the downstream side moisture absorption in the air passage. For this reason, the desiccant part of the desiccant block device rotates around the shaft center, and the openings on both sides of the air passage are switched between the upstream side and the downstream side, and the air passage is different from the dehumidification target air path and the regeneration air path. It communicates with the opening on the side.

  In this state, regeneration air, that is, return air in the summer and outside air flows in the counterflow direction to the air to be dehumidified in the winter, so the regeneration air is still low in humidity and absorbs moisture. In a high state, the air flows through the upstream portion where the moisture absorption of the air passage is low, and thereafter, the humidity increases as it flows to the downstream side where the air passage is high in humidity. Therefore, since the outside air and the return air flow countercurrently in the air passage due to the rotation around the axial center, the regeneration efficiency of the desiccant portion is increased.

  In the desiccant air conditioner, the total heat exchanger is located upstream of the desiccant block device in both the outside air path and the return air path, and the outside air exchanges total heat in the total heat exchanger with the return air that has not passed through the desiccant block device. As a result, the humidity difference between the outside air and the return air increases, and the amount of latent heat exchange increases.

  By providing a static total heat exchanger and a desiccant block device in which the outside air and return air flow countercurrently through the air passage by rotation, there is no restriction on the flow path shape of the outside air and return air routes, and compact air conditioning Machine can be realized.

The schematic diagram which shows the structure of the desiccant air conditioner in embodiment of this invention The perspective view which shows the total heat exchanger in the same embodiment The perspective view which shows the 1st attitude | position state of the desiccant block apparatus in the embodiment The perspective view which shows the 2nd attitude | position state of the desiccant block apparatus in the embodiment The perspective view which shows the structure of the desiccant air conditioner in the embodiment Schematic diagram showing the flow of air viewed from the Z direction of FIG. Schematic diagram showing the air flow as seen from the Y direction in FIG. The perspective view which shows the seal structure of the desiccant block apparatus in the embodiment Part a enlarged view of FIG. The schematic diagram which shows the desiccant block apparatus in other embodiment of this invention The perspective view which shows the desiccant block apparatus in other embodiment of this invention. Front view of the desiccant block device AA arrow sectional view of FIG. Part a enlarged view of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5, the desiccant air conditioner includes an outside air port 2 that takes in the outside air OA into the casing 1, an air inlet 3 that supplies the outside air OA into the room as a supply air SA, and a return air port 4 that takes in the return air RA. , And an exhaust port 5 for exhausting the return air RA as exhaust EA. Here, an air passage from the outside air port 2 to the air supply port 3 is defined as an outside air path 6, and from the return air port 4 to the exhaust port 5. The ventilation path will be described as the return air path 7.

The outside air path 6 becomes a dehumidification target air path in the summer and a regeneration air path (humidification target) in the winter. The return air path 7 becomes a regeneration air path in the summer and a dehumidification target air path in the winter.
The inside of the casing 1 is separated vertically by a horizontal closing plate 8 and separated by an upstream side and a downstream side by a first longitudinal closing plate 9 and a second longitudinal closing plate 10, respectively.

  Above the horizontal closing plate 8 and upstream from the first vertical closing plate 9 is the first chamber 11, below the horizontal closing plate 8 and upstream from the first vertical closing plate 9 to the second chamber 12 and above the horizontal closing plate 8. Thus, the third chamber 13 is provided between the first vertical closing plate 9 and the second vertical closing plate 10, and the fourth chamber 14 is provided between the first vertical closing plate 9 and the second vertical closing plate 10 below the horizontal closing plate 8. A fifth chamber 15 is defined above the horizontal closing plate 8 and downstream from the second vertical closing plate 10, and a sixth chamber 16 is defined below the horizontal closing plate 8 and downstream from the second vertical closing plate 10.

  The outside air path 6 includes a first chamber 11, a fourth chamber 14, and a fifth chamber 15, and the return air path 7 includes a second chamber 12, a third chamber 13, and a sixth chamber 16. A desiccant block device 17 and a total heat exchanger 18 communicating with both of the outside air path 6 and the return air path 7 are provided. Further, in the outside air path 6, a first cold / hot water coil 19 is disposed in the fourth chamber 14, an air supply fan 20 is disposed in the fifth chamber 15, and a second cold / hot water coil 21 is disposed downstream thereof. In the path 7, the hot water coil 22 is disposed in the third chamber 13, and the exhaust fan 23 is disposed in the sixth chamber 16. The third chamber 13 and the fourth chamber 14 are divided into front chambers 13a and 14a and rear chambers 13b and 14b by partitions of the first cold / hot water coil 19 and the hot water coil 22, respectively. There is no restriction | limiting in the quantity and position of this 1st cold / hot water coil 19, the 2nd cold / hot water coil 21, and the hot water coil 22. FIG.

  The desiccant block device 17 is interposed between the third chamber 13, the fourth chamber 14, the fifth chamber 15, and the sixth chamber 16, and the total heat exchanger 18 located upstream from the desiccant block device 17 is disposed in the first chamber. 11, the second chamber 12, the third chamber 13, and the fourth chamber 14.

  As shown in FIG. 2, the total heat exchanger 18 includes a first flow path group 181 including a plurality of flow paths 18 a communicating with the outside air path 6 and a first flow path 18 b including a plurality of flow paths 18 b communicating with the return air path 7. It has two flow path groups 182, and the flow paths 18a of the first flow path group 181 and the flow paths 18b of the second flow path group 182 are alternately stacked, and both flow paths 18a and 18b are orthogonally flowed. The outside air OA exchanges total heat with the return air RA that has not passed through the desiccant block device 17 in the total heat exchanger 18.

  The desiccant block device 17 includes a plurality of desiccant portions 17a and 17b that are rotatably provided around an axis in a direction orthogonal to the flow direction of the outside air path 6 and the return air path 7, and each of the desiccant parts 17a and 17b includes: Desiccant blocks 172a and 172b each having a plurality of ventilation paths 171a and 171b and frames 173a and 173b for storing and holding the desiccant blocks 172a and 172b are provided. In the present embodiment, two desiccant portions 17a and 17b are disclosed and described, but the desiccant portions 17a and 17b are not limited in quantity.

  In the present embodiment, the plurality of desiccant portions 17a and 17b form a columnar body having a regular tetragonal cross section that transforms integrally by rotating around the shaft center, and one set of four surfaces parallel to the shaft center. One of the facing surfaces A and B forms an air inflow surface, the other forms an air outflow surface, and the other set of facing surfaces C and D forms a closing surface. The desiccant portions 17a and 17b are not limited in shape, and various shapes can be employed.

  Various means can be adopted as means for rotationally driving the desiccant portions 17a and 17b, for example, a combination of a pulley and a belt, and a combination of a sprocket and a chain. The direction of the rotation axis can be arranged both in the horizontal direction and in the vertical direction.

  The air passages 171a and 171b are formed between the air inflow surface and the air outflow surface, and an opening at the air inflow surface serves as an air inflow port, an opening at the air outflow surface serves as an air outflow port, and the desiccant portion 17a The ventilation path 171a and the ventilation path 171b of the other desiccant part 17b are formed in the orthogonal direction.

  The desiccant portions 17a and 17b have a first posture state in which the air passages 171a and 171b communicate with the dehumidification target air path, that is, the outdoor air path 6 in summer and the return air path 7 in winter by rotation around the axis. The paths 171a and 171b change to a regenerative air path, that is, a second posture state communicating with the return air path 7 in the summer and the outside air path 6 in the winter.

  For example, in the summer, when one of the desiccant portions 17a is in the first posture state, a surface facing the upstream side of the outside air path 6 is an air inflow surface, and a surface facing the downstream side of the outside air path 6 is an air outflow surface. The closed surface faces the return air path 7.

  And the other desiccant part 17b will be in a 2nd attitude | position state, the surface which faces the upstream of the return air path 7 becomes an air inflow surface, and the surface which faces the downstream of the return air path 7 becomes an air outflow surface, Is opposed to the outside air path 6.

  As shown in FIGS. 8 and 9, the horizontal closing plate 8 and the second vertical closing plate 10 are provided with a flexible sealing member 24 at an edge portion facing the desiccant portions 17 a and 17 b, and the sealing member 24 is a desiccant. The corners of the portions 17a and 17b are in close contact with the frames 173a and 173b, and seal between the desiccant portions 17a and 17b and the horizontal closing plate 8 and the second vertical closing plate 10, respectively.

Hereinafter, the operation of the above configuration will be described.
Summer Mode In the summer mode, the outside air OA is the dehumidification target air, the outside air path 6 is the dehumidification target air path, the return air RA is the regeneration air, and the return air path 7 is the regeneration air path.

  For this reason, as shown in FIG. 6A, when one of the desiccant portions 17a is in the first posture state connected to the outside air path 6, as shown in FIG. 7A, the other desiccant portion 17b. Becomes the second posture state connected to the return air path 7.

  In this state, the external air OA flows into the total heat exchanger 18 into the plurality of flow paths 18a of the first flow path group 181 communicating with the external air path 6, and the second flow path group 182 communicating with the return air path 7. The return air RA flows into the plurality of flow paths 18b, and the outside air OA and the return air RA are totally exchanged in the total heat exchanger 18. At this time, the return air RA is in a state before passing through the desiccant block device 17 and its humidity is low, the humidity difference between the outside air OA and the return air RA is large, and the amount of latent heat exchange is increased.

  The outside air OA that has passed through the total heat exchanger 18 is pre-cooled by a first cold / hot water coil 19 serving as a cold water coil in the summer, and then flows into one desiccant portion 17a and adsorbed as shown in FIG. 6 (a). Or it is dehumidified by sorption. Thereafter, the outside air OA passes through the air supply fan 20, is adjusted to the set temperature by the second cold / hot water coil 21 that becomes a cold water coil in the summer, and is supplied.

  On the other hand, the return air RA that has passed through the total heat exchanger 18 is preheated by the hot water coil 22 and then flows into the other desiccant portion 17b as shown in FIG. The desiccant portion 17b is regenerated and exhausted by the exhaust fan 23.

  As shown in FIGS. 6 (b) and 7 (b), after the elapse of a predetermined time or at an appropriate time, the desiccant parts 17a and 17b of the desiccant block device 17 are rotated so that one of the desiccant parts 17a is in the first posture state. To the second posture state, and the other desiccant portion 17b is changed from the second posture state to the first posture state.

  When one desiccant portion 17a used for dehumidification changes from the first posture state to the second posture state, as shown in FIG. 6 (a), the air passage 171a connected to the outside air path 6 in the first posture state As shown in FIG. 6C, the upstream opening (B) that forms the air inlet forms the downstream opening (B) that forms the air outlet of the ventilation passage 171a in the second posture state where the upstream opening (B) is connected to the return air path 7. It becomes.

  As described above, the desiccant portions 17a and 17b of the desiccant block device 17 rotate around the shaft center, and the opening on the upstream side of the air passages 171a and 171b changes to the downstream side, and the air passages 171a and 171b are dehumidified air paths. The outside air path 6 communicates with the return air path 7 of the regeneration air path through openings on different sides. For this reason, as for the ventilation path 171a of one desiccant part 17a, the part where moisture absorption became high changes from the upstream to the downstream while external air flows, and the part where moisture absorption is low changes from the downstream to the upstream. .

  In this state, as shown in FIG. 6 (c), the return air RA for the regeneration air moves from the upstream side opening (A) to the downstream side opening (B) through the ventilation path 171a, and the outside air OA that is the dehumidification target air Therefore, the regeneration air flows in the upstream portion where the moisture absorption capacity of the ventilation passage 171a is low in a state where the humidity is still low and the moisture absorption capacity is high, and then the ventilation passage. Humidity increases as it flows downstream, where the moisture absorption of 171a is high, and the air passage 171a is regenerated. Therefore, the regeneration efficiency of the desiccant portion 17a is increased by allowing the outside air OA and the return air RA to flow countercurrently in the air passage 171a due to rotation around the axial center of the desiccant portion 17a.

Further, since the air inflow surfaces of the desiccant portions 17a and 17b are switched to the air outflow surfaces, dust and foreign matter adhering to the air inflow surfaces are discharged to the exhaust side at every rotation operation, and an increase in ventilation resistance can be suppressed. The power of the air fan 20 and the exhaust fan 23 can be suppressed.
Winter Mode In the winter, the return air RA is the dehumidification target air, the return air path 7 is the dehumidification target air path, the outside air OA is the regeneration air, and the outside air path 6 is the regeneration air path (humidification target). In the same operation, the moisture dehumidified from the return air RA is given to the outside air OA to be humidified, and the adjusted outside air OA is supplied.

  Also in this case, the desiccant parts 17a and 17b of the desiccant block device 17 rotate around the shaft center, and the opening on the upstream side of the air passages 171a and 171b changes to the downstream side, and the air passages 171a and 171b are dehumidified air. The return air path 7 of the path and the outside air path 6 of the regeneration air path communicate with each other through different openings. For this reason, in the air passage 171a of one desiccant portion 17a, the portion where the moisture absorption is increased while the return air flows is changed from the upstream side to the downstream side, and the portion where the moisture absorption is low is changed from the downstream side to the upstream side. To do.

  Then, the outside air OA of the regeneration air flows in the counterflow direction with respect to the flow of the return air RA that is the dehumidifying air through the ventilation path 171a, and the ventilation path 171a is in a state where the humidity is still low and the moisture absorption capacity is high. Then, the humidity increases as it flows through the upstream portion where the moisture absorption is low and then flows downstream where the moisture absorption of the air passage 171a is high, and the air passage 171a is regenerated. Therefore, the desiccant portion 17a is rotated around the axial center so that the outside air OA and the return air RA flow countercurrently to the air passage 171a, thereby increasing the regeneration efficiency of the desiccant portion 17a and increasing the humidification efficiency of the outside air OA in winter.

  As described above, the desiccant block device 17 according to the present invention and the stationary total heat exchanger 18 are combined, and the counter air flow in the desiccant block device 17 is counterflowed between the outside air and the return air. Heat exchange with the return air that has not passed through the desiccant block device 17 can increase the regeneration efficiency of the desiccant part, and the total heat exchange rate in the total heat exchanger without a complicated structure It is possible to realize an air conditioner that can enhance the temperature.

By switching the flow path in the desiccant block device 17 by rotating the desiccant block device 17, it is possible to improve the durability and maintainability of the entire device by reducing the number of parts and movable parts compared to the conventional switching device. it can.
Other Embodiments of the Invention As shown in FIG. 10, a bypass path 6 a and a damper device 6 b of the outside air path 6 are provided between the first chamber 11 and the fourth chamber 14, and the second chamber 12 and the third chamber 13 are provided. It is also possible to provide the bypass path 7a and the damper device 7b of the return air path 7 between them. There is no limitation on the quantity or position of the damper device 7b. In the present embodiment, members that perform the same operations as those of the previous embodiments are denoted by the same reference numerals, and description thereof is omitted.

  According to this configuration, in the intermediate period when the specific enthalpy between the outside air OA and the return air RA is small and the total heat exchanger 18 is not required in the ventilation operation, the damper devices 6b and 7b are opened, thereby opening the outside air OA. And the return air RA flow around the total heat exchanger 18 through the bypass passages 6a and 7a, respectively. For this reason, the power of the air supply fan 20 and the exhaust fan 23 can be reduced.

  As shown in FIGS. 11 to 14, the desiccant block device 17 can also be configured by a plurality of desiccant portions 30 a and 30 b forming a cylindrical body having a regular circular cross section. Here, the desiccant portions 30a, 30b have an air inflow surface A, an air outflow surface B, and closed surfaces C, D divided into a quarter of the circumference on the outer peripheral surface around the axis. An air passage 171a is formed between the air inflow surface A and the air outflow surface B of the desiccant portion 30a, and an air passage 171b is formed between the air inflow surface A and the air outflow surface B of the other desiccant portion 30b.

  Even in this configuration, the flow path can be switched by the rotation of the desiccant portions 30a and 30b. And by making the cross-sectional shape of the desiccant portions 30a and 30b into a circular shape, the seal member 24 is always kept in sliding contact with the outer peripheral surface of the desiccant portions 30a and 30b, so that airflow leakage during flow path switching is suppressed. it can.

DESCRIPTION OF SYMBOLS 1 Casing 2 Outside air port 3 Air supply port 4 Return air port 5 Exhaust port 6 Outside air path 6a Bypass path 6b Damper apparatus 7 Return air path 7a Bypass path 7b Damper apparatus 8 Horizontal closing board 9 1st vertical closing board 10 2nd vertical closing Plate 11 First chamber 12 Second chamber 13 Third chamber 13a Front chamber 13b Rear chamber 14 Fourth chamber 14a Front chamber 14b Rear chamber 15 Fifth chamber 16 Sixth chamber 17 Desiccant block device 17a, 17b Desiccant section 18 Total heat exchange 18a, 18b Flow path 19 First cold / hot water coil 20 Air supply fan 21 Second cold / hot water coil 22 Hot water coil 23 Exhaust fan 24 Seal member 30a, 30b Desiccant part 171a, 171b Ventilation path 172a, 172b Desiccant block 173a, 173b Frame 181 First channel group 182 Second channel group OA Outside air RA Return air SA Supply air E Exhaust

Claims (3)

A plurality of desiccants that are interposed between the dehumidification target air path and the regeneration air path in the air conditioner and are rotatable about the axis in the direction perpendicular to the flow direction of the dehumidification target air path and the regeneration air path. Part
The plurality of desiccant portions are formed in a columnar shape having a regular square cross section that is integrally transformed by the rotation operation around the axis, and the air passage is used for regeneration, and the air passage is in communication with the air path to be dehumidified. Change to the second posture state communicating with the air path ,
When at least one desiccant portion is in the first posture state, at least one other desiccant portion is in the second posture state, and dehumidification is performed in the first posture state when changing from the first posture state to the second posture state. The desiccant block device characterized in that the upstream opening forming the air inlet of the air passage connected to the target air path becomes the downstream opening forming the air outlet of the air passage in the second posture state. The outside air is supplied to the room and becomes a dehumidification target air path in the summer, and the outside air path that becomes the regeneration air path in the winter and the return air from the room is exhausted to become the regeneration air path in the summer and the dehumidification air in the winter. It is equipped with a desiccant block device that communicates with the return air path, the outside air path and the return air path.
The desiccant block device has a plurality of desiccant portions that are interposed between the outside air path and the return air path, and are rotatably provided around the axis in the direction orthogonal to the flow direction of the outside air path and the return air path. The plurality of desiccant portions are formed in a columnar shape having a regular square cross section that is integrally transformed by the rotation operation around the axis, and the air passage is used for regeneration, and the air passage is in communication with the air path to be dehumidified. Change to the second posture state communicating with the air path ,
When at least one desiccant portion is in the first posture state, at least one other desiccant portion is in the second posture state, and dehumidification is performed in the first posture state when changing from the first posture state to the second posture state. A desiccant air conditioner, wherein an upstream opening that forms an air inlet of an air passage connected to a target air path is a downstream opening that forms an air outlet of the air passage in the second posture state. The outside air is supplied to the room and becomes a dehumidification target air path in the summer, and the outside air path that becomes the regeneration air path in the winter and the return air from the room is exhausted to become the regeneration air path in the summer and the dehumidification air in the winter. A return air path, a desiccant block device and a total heat exchanger communicating with the outside air path and the return air path,
The desiccant block device includes a first posture state in which the air passage is connected between the outside air path and the return air path, and the air passage communicates with the air path to be dehumidified by the rotation operation around the shaft center, and the air passage becomes the air path for regeneration. Having a plurality of desiccant portions that change to the communicating second posture state;
When the at least one desiccant part is in the first posture state, at least one other desiccant part is in the second posture state, and when the plurality of desiccant parts are in the second posture state, The upstream opening that forms the air inlet of the air passage connected to the air path to be dehumidified in the first posture state becomes the downstream opening that forms the air outlet of the air passage in the second posture state,
The total heat exchanger is located on the upstream side of the desiccant block device in both the outside air route and the return air route, and the outside air and the return air that have not passed through the desiccant block device totally exchange heat,
The desiccant air conditioner characterized in that the outside air path and the return air path have a bypass section that bypasses the total heat exchanger .

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