JP6646804B2 - Dehumidifier - Google Patents

Description

  The present invention relates to a dehumidifying device used for a living space or the like.

  BACKGROUND ART Dehumidifiers have been put to practical use to reduce the humidity of a living space and increase comfort.

  As its configuration, a main body case having an air inlet and an air outlet, dehumidifying means provided in the main body case, and air outside the main body case sucked from the air suction port are passed through the dehumidifying means. And a blower that blows out of the main body case from the air outlet.

  Further, the dehumidifying means is constituted by a refrigeration cycle in which a compressor, a radiator, an expander, and a heat absorber are sequentially connected in a ring shape, and a part of the air sucked into the main body case from the air suction port by the blower is the aforementioned. A heat absorber, a first passage of the heat exchanger, and a configuration in which the air is blown out of the main body case from the air outlet through the radiator, and the other part of the air sucked from the air suction port by the blower is the second part of the heat exchanger. The air outlet is blown out of the main body case through two passages and a radiator (for example, Patent Document 1 below).

Japanese Utility Model Publication No. 56-20628

  In the above conventional example, a part of the air sucked into the main body case from the air suction port by the blower is cooled by the heat absorber to cause dew condensation, and thereafter, the air outlet through the first passage of the heat exchanger and the radiator. From the body case.

  Another portion of the air sucked from the air inlet by the blower passes through the second passage of the heat exchanger, and is blown out of the main body case from the air outlet through the radiator.

  That is, the room air passing through the second passage of the heat exchanger is cooled by the air flowing from the heat absorber to the first passage of the heat exchanger, and the dew condensation is also attempted here.

  However, in the above configuration, it is necessary to complicate each air path in a limited space, the air path resistance increases, the air volume decreases, and the required air volume for each element cannot be secured, and the dehumidification efficiency There is a problem that becomes lower.

  Therefore, an object of the present invention is to provide a dehumidifying device having an enhanced dehumidifying effect.

The dehumidifying device according to the present invention dehumidifies air in the main body case by a refrigeration cycle in which a main body case having an air inlet and an air outlet and a compressor, a radiator, an expander, and a heat absorber are sequentially connected. Dehumidifying means, and a blower which blows air outside the main body case sucked from the air suction port through the dehumidifying means and blows the air out of the main body case from the air outlet, and has an air inlet and an air outlet. The main body case, a dehumidifying means for dehumidifying the air in the main body case by a refrigeration cycle in which a compressor, a radiator, an expander, and a heat absorber are connected in order, and the air outside the main body case sucked from the air suction port. A blower that blows out of the main body case from the air outlet after passing through the dehumidifying means, wherein the dehumidifying means sucks air from the air suction port into the main body case by the blower. A first dehumidification path for blowing a portion A of the discharged air from the air outlet through the heat sink, the first passage, and the radiator to the outside of the main body case; and air sucked from the air suction port by the blower. A second dehumidifying path that blows out the other part B from the air outlet through the second passage and the radiator to the outside of the main body case, and air flowing through the first passage and air flowing through the second passage. A heat exchanger that exchanges heat between the heat exchanger, and the heat exchanger, installed below the heat absorber, receives the dew water generated in the first passage and the heat absorber of the heat exchanger, (2) a water receiving means which also serves as a part of a dehumidifying path, a tank for storing dew condensation water is provided below the water receiving means, and a drain hole for leading the dew condensation water from the water receiving means to the tank is provided with the heat absorbing means; those located on the windward side of the vessel There, thereby, is to achieve the intended purpose.

As described above, since the drain hole is provided outside the dehumidifying path, it is possible to provide an efficient dehumidifier capable of suppressing the entry of air from the drain hole and suppressing a decrease in the dehumidifying ability. You can do it.

FIG. 2 is a perspective view of the dehumidifier according to the first embodiment of the present invention. AA sectional view of the dehumidifier according to the first embodiment of the present invention. 1 is a perspective view of a configuration around a heat absorber and an air passage of a dehumidifier according to a first embodiment of the present invention. Exploded perspective view of the heat exchanger of the dehumidifier according to the first embodiment of the present invention. An upper view showing an airflow around an air inlet of the dehumidifier according to the first embodiment of the present invention. AA sectional view of the dehumidifier according to the second embodiment of the present invention. The figure which shows the pressure difference with the atmospheric pressure in the 1st dehumidification path | route of the dehumidifier which concerns on Embodiment 2 of this invention, and a 2nd dehumidification path | route. AA sectional view of the dehumidifier according to the third embodiment of the present invention.

The dehumidifying device according to the embodiment of the present invention includes a main body case having an air inlet and an air outlet, and a refrigeration cycle in which a compressor, a radiator, an expander, and a heat absorber are connected in order. A dehumidifying means for dehumidifying air, and a blower for blowing air outside the main body case sucked from the air suction port to the outside of the main body case from the air outlet after passing through the dehumidifying means, wherein the dehumidifying means comprises A first dehumidifying path for blowing a part A of air sucked into the main body case from the air suction port to the outside of the main body case from the air outlet through the heat absorber, the first passage, and the radiator; A second dehumidification path for blowing another portion B of the air sucked from the air suction port to the outside of the main body case through the air outlet through the second passage and the radiator; A heat exchanger for exchanging heat between air flowing through a first passage and air flowing through the second passage; and a heat exchanger disposed below the heat exchanger and the heat absorber, wherein the first passage of the heat exchanger is provided. And a water receiving means for receiving the dew water generated in the heat absorber and also serving as a part of the second dehumidifying path, a tank for storing dew water below the water receiving means, A drain hole for leading dew water from the means to the tank is disposed on the windward side of the heat absorber.

  Accordingly, since a drain hole is provided outside the dehumidification path, it is possible to provide an efficient dehumidifier capable of suppressing the entry of air from the drain hole and suppressing a decrease in dehumidification capacity. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. The following embodiments are examples embodying the present invention, and do not limit the technical scope of the present invention. The same parts are denoted by the same reference numerals throughout the drawings, and description thereof is omitted. Further, in each drawing, the description of the details of each part not directly related to the present invention is omitted.

(Embodiment 1)
FIG. 1 is a perspective view of a dehumidifier 3 according to the present embodiment.

  The dehumidifying device 3 includes a box-shaped main body case 1, and the inside and outside of the dehumidifying device 3 are distinguished by the main body case 1. On the back side of the main body case 1, an air suction port 2 for sucking air from a direction perpendicular to the back side is arranged. An air outlet 4 is arranged at an upper portion on the front side opposite to the rear surface.

  The air suction port 2 has a suction port 2a having a substantially rectangular suction surface, and a substantially U-shaped suction surface which goes around the upper and left and right sides of the suction port 2a and faces downwardly to open. And a suction port 2b. FIG. 2 is a cross-sectional view of the dehumidifier 3 according to the present embodiment, taken along line AA in FIG.

  After the dehumidifying means 5 for dehumidifying the air taken in the main body case 1 and the air outside the main body case 1 sucked from the air suction port 2 are passed through the dehumidifying means 5 in the main body case 1. A blower 6 that blows out of the main body case 1 from the air outlet 4 is provided.

  The dehumidifying means 5 includes a refrigeration cycle in which a compressor 7, a radiator 8, an expander 9, and a heat absorber 10 are sequentially connected.

  A heat absorber 10 is provided on the side of the air inlet 2 (upstream in the air flow direction) in the air passage from the air inlet 2 to the air outlet 4 in the main body case 1, and on the air outlet 4 side (downstream in the air flow direction). Side) is provided with a radiator 8.

  Further, a space is provided between the heat absorber 10 and the radiator 8, and a sensible heat exchange type heat exchanger 11 is arranged in this space.

  That is, the dehumidifying unit 5 blows a part A of the air sucked from the air suction port 2, that is, the air sucked from the suction port 2 a through the heat absorber 10, the first passage in the heat exchanger 11, and the radiator 8. A first dehumidifying path 41 that blows out of the main body case 1 from the outlet 4 is provided.

  Further, in the main body case 1, a pre-cooling air passage leading to the heat exchanger 11 is provided by passing from the air suction port 2 around the heat absorber 10 to receive a cooling effect from the heat absorber 10.

  That is, the dehumidifying means 5 transmits the other part B of the air sucked from the air suction port 2, that is, the air sucked from the suction port 2 b, in addition to the first dehumidifying path 41, to the pre-cooled air path and the heat exchanger 11. There is provided a second dehumidifying path 51 that blows out of the main body case 1 from the air outlet 4 through the second passage and the radiator 8. The details of the pre-cooling air path will be described later.

  The heat exchanger 11 includes an opening 17 in the first dehumidifying path and an opening 18 in the second dehumidifying path.

  The opening 17 in the first dehumidifying path includes an upstream opening 17a on the heat absorber 10 side and a downstream opening 17b on the radiator 8 side. That is, the opening 17 in the first dehumidifying path is provided in the first dehumidifying path 41, and connects the heat exchanger 11 and the heat absorber 10 on the upstream side and the heat exchanger 11 and the radiator 8 on the downstream side. connect.

  The opening 18 in the second dehumidifying path includes an upstream opening 18a on the pre-cooling air path side and a downstream opening 30 on the water receiving means 12a side (vertically downward direction). That is, the opening 18 in the second dehumidifying path is provided in the second dehumidifying path 51, and connects the pre-cooled air path and the heat exchanger 11 on the upstream side and the lower part of the heat exchanger 11 and the radiator 8 on the downstream side. And concatenate. The water receiving means 12a has a funnel shape and is provided below the heat absorber 10 and the heat exchanger 11. Further, a tank 12b is disposed below the water receiving means 12a so as to be detachable from the main body case 1.

  That is, dew is formed in the heat absorber 10 and the heat exchanger 11, and the condensed water is collected by the funnel-shaped water receiving means 12a and flows into the tank 12b.

  Subsequently, the detailed structure of the pre-cooled air passage will be described with reference to FIG. FIG. 3 is a perspective view of the configuration around the heat absorber and the air passage.

  As shown in FIG. 3, the pre-cooling air passage 60 has an air passage 60 a starting from the side of the suction port 2 b and reaching the upstream opening 18 a via the side surface of the heat absorber 10 and the side surface of the heat exchanger 11, An air path 60b is formed from the upper part of the inlet 2b as a starting point to the upstream opening 18a via the upper surface of the heat absorber 10.

  An air path wall 81 is provided around the heat absorber 10, that is, on the upper surface and both side surfaces.

  The air passage wall 81 further extends on both sides to the same sides of the adjacent heat exchanger 11. That is, the air path wall 81 blocks the ventilation between the first dehumidifying path 41 and the pre-cooling air path 60 between the heat absorber 10 and the heat exchanger 11, that is, the inner peripheral wall surface (the 1 side surface on the dehumidifying path side). Further, the outer peripheral wall surface of the pre-cooling air passage 60 is formed by the inner surface of the main body case 1. The air path wall 81 is made of a material capable of exchanging heat between the first dehumidifying path 41 and the pre-cooling air path 60, for example, a thin resin plate or metal of about 1 to 3 mm at least at a portion around the heat absorber 10. It is a plate.

  The heat absorber 10 has a refrigerant pipe 101 composed of a straight pipe portion 101a and a bent portion 101b. The straight pipe portion 101a has a plurality of flat fins made of metal for transmitting heat of the refrigerant flowing through the refrigerant pipe 101 to air passing through the heat absorber 10.

  The straight pipe portion 101 a and the fins of the heat absorber 10 are arranged in an internal space surrounded by the air path wall 81. That is, a portion A of the air passing through the first dehumidifying path 41 is provided so as to pass through the straight pipe portion 101a and the fin portion.

  On the other hand, the bent portion 101 b of the heat absorber 10 is disposed so as to protrude from the air passage wall 81 surrounding the heat absorber 10 to the precooled air passage 60. In other words, another portion B of the air passing through the pre-cooling air passage 60 of the second dehumidifying passage 51 is provided so as to pass through the air passage wall 81 around the heat absorber 10 and the outer pipe wall of the bent portion 101b.

  Subsequently, the detailed structure of the heat exchanger 11 will be described with reference to FIG. FIG. 4 is an exploded perspective view of the heat exchanger.

  As shown in FIG. 4, the heat exchanger 11 has a structure in which a plurality of synthetic resin plates 13 for forming a vertical air passage and a plurality of synthetic resin plates 14 for forming a horizontal air passage are alternately superposed. ing.

  A plurality of ribs 15 extending in the vertical direction are formed integrally with the plate 13 at predetermined intervals on the surface of the synthetic resin plate 13 forming a vertical air passage. One surface of the rib 15 is in close contact with the back surface of the adjacent plate body 14, so that a vertical air path is formed by the surface of the plate body 13 and the rib 15 and the back surface of the plate body 14.

  Similarly, a plurality of ribs 16 extending in the lateral direction are integrally formed with the plate body 14 at predetermined intervals on the surface of the synthetic resin plate body 14 that forms the horizontal air passage. When one surface of the rib 16 is in close contact with the back surface of the adjacent plate 13, a horizontal air path is formed by the surface of the plate 14, the rib 16, and the back surface of the plate 13.

  The vertical airway and the horizontal airway have independent airway spaces, that is, there is no air flow.

  The heat exchanger 11 thus configured has a substantially rectangular parallelepiped shape, and the opening 17 in the first dehumidifying path is formed as shown on the long side (the left and right sides in FIG. 3) facing the heat exchanger 11. The second dehumidifying passage opening 18 is formed on the opposite short side (upper and lower sides in FIG. 3). Further, the downstream opening 30 on the short side is inclined with respect to the first dehumidifying path 41, that is, the horizontal plane, and the inclination direction is a direction in which the opening surface of the downstream opening 30 faces the radiator 8 side. .

  Next, the operation of the dehumidifier will be described mainly with reference to FIG.

  The air sucked into the main body case 1 from the air suction port 2 by driving the blower 6 (a part A of the air suctioned from the suction port 2a) is an upstream opening of the heat absorber 10 and the heat exchanger 11. After passing through the first passage 17a and the horizontal passage, it is taken into the radiator 8 from the downstream opening 17b. Thereafter, the air is blown out of the main body case 1 from the air outlet 4 through the radiator 8 and the blower 6. That is, a part A of the air sucked from the suction port 2 a is blown out of the main body case 1 via the first dehumidifying path 41.

  Then, a part A of the air flowing in such a path is first cooled by the heat absorber 10, so that dew condensation occurs here, and the dew condensation water drops downward, and the funnel-shaped water receiving means 12a. It is collected and made to flow into the tank 12b.

  Further, the dried air A after the dew condensation water has been dropped passes from the upstream opening 17a of the heat exchanger 11 through the first horizontal passage, passes through the downstream opening 17b, and then passes through the radiator 8, The air is blown out of the main body case 1 from the air outlet 4 through the blower 6. Thus, the indoor humidity can be reduced.

  On the other hand, the air sucked into the main body case 1 from the air suction port 2 by driving the blower 6 (the other portion B of the air sucked from the suction port 2b) flows into the upstream opening 18a of the heat exchanger 11. Then, the air passes through a vertical second passage, and is blown out of the main body case 1 from the air outlet 4 through the downstream opening 30, the radiator 8, and the blower 6. That is, another portion B of the air sucked from the suction port 2b is blown out of the main body case 1 via the second dehumidifying path 51. Since the downstream opening 30 is inclined toward the radiator 8 as described above, the air B flowing out of the downstream opening 30 flows to the radiator 8 smoothly.

  Since the first horizontal passage (the passage through which a portion of the air A passes) of the heat exchanger 11 and the second vertical passage (the passage through which the other portion B of the air passes) intersect, The air (the part A of the air) flowing through the first passage and the air (the other part B of the air) flowing through the second passage can exchange heat.

  Here, a part A of the air flowing through the first lateral passage of the heat exchanger 11 is cooled by passing through the heat absorber 10. Therefore, the part A of the air can lower the temperature of the other part B of the air flowing through the second passage not passing through the heat absorber 10 by the heat exchange action of the heat exchanger 11.

  Another portion B of the air passing through the pre-cooling air passage 60 receives the cooling effect of the heat absorber 10 via the air passage wall 81. Further, the cooling effect by the bent portion 101b is also received. This is because the refrigerant having a temperature lower than the room temperature passes through the bent portion 101b, so that the temperature of the air outside the bent portion 101b of the heat absorber 10 protruding into the pre-cooling air passage 60 decreases. As a result, the temperature of the other portion B of the air passing through the pre-cooling air passage 60 is cooled to around the dew point temperature at which dew condensation occurs.

  Another portion B of the air cooled to around the dew point temperature flows into the second passage of the heat exchanger 11. The other portion B of the air that has flowed into the heat exchanger 11 receives a cooling effect due to the heat exchange action of the heat exchanger 11, and its temperature drops to a temperature equal to or lower than the dew point temperature. The other portion B of the air that has dropped to the dew point temperature or lower causes dew condensation in the second passage of the heat exchanger 11.

  Here, in the conventional configuration, the air flowing into the heat exchanger 11 is at room temperature, and dew condensation does not occur unless the air is cooled to the dew point temperature. Therefore, the air inlet of the heat exchanger 11 where cooling by the heat exchanger 11 starts ( Dew condensation did not occur near the upstream opening 18a). However, in the configuration according to the present embodiment, the other portion B of the air flowing into the second passage of the heat exchanger 11 is cooled to near the dew point temperature by passing through the pre-cooling air passage 60, so that heat exchange is performed. Dew condensation can also occur at the air inlet (upstream opening 18a) of the second passage of the vessel 11.

  Thereby, most of the cold heat received by the other portion B of the air when passing through the heat exchanger 11 can be effectively used for latent heat removal, that is, dew condensation, instead of sensible heat removal of the other portion B of the air. become. As a result, the amount of dew condensation in the heat exchanger 11 can be increased, and thus the dehumidifier having the configuration according to the present embodiment can further enhance the dehumidifying effect.

  Further, a suction port 2b into which another part B of the air is sucked is provided on an outer peripheral side adjacent to the suction port 2a into which a part A of the air is sucked. Therefore, the amount of inflow of air sucked from the suction port 2b can be increased by the attraction effect of the air sucked into the suction port 2a. That is, as shown in FIG. 5, an air flow sucked into the suction port 2a forms an air flow 90 from the outside of the main body case 1 to the suction port 2a, and around the air flow 90 is attracted by the viscosity of the air. An induced flow 91 is formed. By sucking the induced flow 91 from the suction port 2b provided on the outer peripheral side of the suction port 2a, the second dehumidifying path can suck more air. Therefore, the amount of air passing through the second dehumidifying path increases, and the amount of dew condensation in the heat exchanger 11 increases, so that the dehumidifying effect can be further enhanced. In other words, if the same dehumidifying effect is obtained, the size of the dehumidifying device can be reduced.

  Now that the basic configuration and operation have been understood from the above description, a specific configuration will be described with reference to FIG.

  The feature of the present embodiment is a drain hole 70 provided in the water receiving means 12a.

  The water receiving means 12a has a bowl shape with an open top, and is installed below the heat exchanger 11 and the heat absorber 10. The water receiving means 12 a receives dew water generated in the first passage of the heat exchanger 11 and the heat absorber 10 and also serves as a part of the second dehumidifying path 51. Seen from above, the water receiving means 12a is slightly larger than the heat absorber 10, the heat exchanger 11, and the radiator 8.

  A tank 12b for storing dew water is provided below the water receiving means 12a. The water receiving means 12a is provided with a drain hole 70 for drawing dew water from the water receiving means 12a to the tank 12b, and the drain hole 70 is arranged below the heat exchanger 11.

  As a result, the drain hole 70 becomes the lowest point of the water receiving means 12a, so that an air space is formed at the exit of the heat exchanger 11 in the second dehumidifying path 51, and the heat exchanger 11 Since the bending of the air path to the radiator 8 at the outlet is reduced and the ventilation resistance is reduced, the dehumidification efficiency can be increased by reducing the air path resistance and increasing the air volume.

  When the component parts are configured as in the present embodiment, the flow direction is changed from the vertically downward wind direction to the radiator 8 at the outlet of the second path of the heat exchanger 11, so that the wind direction is changed by about 90 degrees, and the horizontal direction is changed. The direction needs to be changed. At that time, an excessive wind path resistance is applied to change the wind direction.

  The drain hole 70 arranged in the water receiving means 12a needs to collect dew condensation water, so it needs to be arranged at the lowest point of the water receiving means 12a. As described above, by arranging the drain hole 70 at the lower part of the heat exchanger 11, a space like an air path is necessarily formed at the lower part of the heat exchanger 11, that is, at the lower part of the first path of the heat exchanger 11. It is formed and can bend the wind path. As a result, the ventilation resistance is reduced, and the dehumidification efficiency can be increased by increasing the air volume.

  Further, the drain hole 70 is disposed below the heat exchanger 11 in the water receiving means and downstream of the second dehumidifying path 51. The water receiving means 12a has an inclined surface such that dew water flows toward the drain hole 70. That is, the inclined surface is inclined downward from the heat absorber 10 toward the radiator 8.

  As a result, a downward gradient is formed toward the drain hole 70 of the water receiving means 12a, so that an air space is formed at the outlet of the heat exchanger 11 of the second dehumidifying path 51, and the heat exchange of the second path is performed. Since the bending of the air path to the radiator 8 is reduced at the outlet of the vessel 11 and the ventilation resistance is reduced, the dehumidification efficiency can be increased by reducing the air path resistance and increasing the air volume.

(Embodiment 2)
6, the same components as those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof will be omitted. The difference from the first embodiment is the position of the drain hole 70 provided in the water receiving means 12a in FIG.

  As shown in FIG. 6, the water receiving means 12 a includes a partition 71 that partitions an outlet of the heat absorber 10 in the first dehumidifying path 41 and an outlet of the second path of the heat exchanger 11 in the second dehumidifying path 51. ing. The partition 71 has a plate shape extending downward from between the heat absorber 10 and the heat exchanger 11. A space is provided between the lower end of the partition 71 and the water receiving means 12a to such an extent that dew water flows. Then, a drain hole 70 for leading dew condensation water from the water receiving means 12a to the tank 12b is disposed at a lower portion of the heat absorber 10, that is, at an upstream side of the first dehumidifying path 41 of the partition 71.

  In the dehumidifying air passage, as shown in FIG. 7, the air that has flowed in from the air inlet at the atmospheric pressure of the outside air ultimately increases the pressure difference from the atmosphere while receiving the air passage resistance of each component. It will be sucked into the blower 6. The greater the pressure difference from the atmosphere, the greater the amount of air leakage when an opening communicating with the atmosphere is opened in that portion.

  In the water receiving means 12a, it is necessary to arrange a drain hole 70 for leading accumulated water droplets to the tank 12b. However, the water receiving means 12a becomes an opening communicating with the atmosphere. It will flow in and the dehumidification performance will be reduced.

  Therefore, as described above, by installing the drain hole 70 below the heat absorber 10, the pressure difference from the atmospheric pressure can be reduced without being affected by the pressure drop due to the air passage pressure loss of the heat absorber 10. And it is possible to provide an efficient dehumidifier capable of suppressing entry of air from the drain hole 70 and suppressing a decrease in dehumidification capacity.

(Embodiment 3)
8, the same components as those in FIG. 6 are denoted by the same reference numerals, and detailed description thereof will be omitted. The difference from the second embodiment is the position of the drain hole 70 provided in the water receiving means 12a of FIG.

As shown in FIG. 8, a drain hole 70 for leading dew condensation water from the water receiving means 12 a to the tank 12 b is arranged on the windward side of the heat absorber 10, that is, on the air suction port 2 side of the main body case 1.
Accordingly, since the drain hole 70 is provided outside the dehumidifying path, it is possible to suppress the entry of air from the drain hole 70, and to provide an efficient dehumidifier capable of suppressing a decrease in the dehumidifying ability. be able to.

  Since the dehumidifying device according to the present invention provides a higher dehumidifying effect, it is extremely useful for dehumidifying indoor air and drying clothes.

REFERENCE SIGNS LIST 1 body case 2 air inlet 3 dehumidifier 4 air outlet 5 dehumidifier 6 blower 7 compressor 8 radiator 9 expander 10 heat sink 11 heat exchanger 12a water receiving means 12b tank 13 plate 14 plate 15 rib 16 Rib 17 First dehumidifying path opening 17a Upstream opening 17b Downstream opening 18 Second dehumidifying path opening 18a Upstream opening 30 Downstream opening 41 First dehumidifying path 51 Second dehumidifying path 60 Pre-cooled air Road 70 Drain hole 71 Partition part 90 Air flow 91 Induced flow 101 Refrigerant pipe 101a Straight pipe part 101b Bent part

Claims (1)

A main body case having an air inlet and an air outlet, dehumidifying means for dehumidifying air in the main body case by a refrigeration cycle in which a compressor, a radiator, an expander, and a heat absorber are sequentially connected; and A blower that blows out the air outside the main body case through the dehumidifying means and then blows the air out of the main body case from the air outlet, wherein the dehumidifying means air sucked into the main body case from the air suction port by the blower. A first dehumidifying path that blows out a part A of the main body case from the air outlet through the heat sink, the first passage, and the radiator, and another of the air sucked from the air suction port by the blower. A second dehumidifying path for blowing the portion B out of the main body case from the air outlet through the second path and the radiator; an air flowing through the first path; and the second path. A heat exchanger that exchanges heat with flowing air; and a heat exchanger that is installed below the heat exchanger and the heat absorber and receives dew water generated in the first passage and the heat absorber of the heat exchanger. A water receiving means serving also as a part of the second dehumidifying path; a drain hole for storing dew water from the water receiving means to the tank; Is disposed on the windward side of the heat absorber.