KR100443849B1 - Laundry Machine with Dryer and Water Cooling Heat Exchanger - Google Patents

Abstract

A heat exchanger with high cooling dehumidification efficiency is realized.

In the water-cooled dehumidifier 13 of the laundry dryer, the projection 17 is provided on the wall surface of the water-cooled dehumidification duct 14, and the cooling water 15 flowing down the wall surface is guided in a zigzag state to increase the flow area.

Description

Laundry Dryer and Water Cooling Heat Exchanger

The present invention relates to a laundry dryer and a water-cooled heat exchanger.

The laundry dryer for washing, dehydrating, and drying is a water-cooled heat exchanger that performs water-cooling and dehumidification of air drawn out from a washing tank by a blower, as described in Japanese Patent Application Laid-Open No. 11-347282, and A heater blown into a washing tank is provided. The water-cooled heat exchanger supplies cooling water to a dehumidifying duct for dehumidifying the wet air drawn out from the washing tank, and splashes water droplets of the cooling water by the force of the air flowing through the dehumidifying duct to exchange heat by contacting the air and the cooling water (cooling). Dehumidification)

However, in a laundry dryer, since there exists a heater which heats air downstream of a water-cooled heat exchanger, it is necessary to make sure that the water droplet which generate | occur | produced in the heat exchanger is carried to circulating air and does not fly to the position of the said heater.

In order to stop the water droplets generated in the heat exchanger in the heat exchanger, if a room for dropping the water droplets is installed in the outlet of the heat exchanger, the heat exchanger is enlarged. there is a problem.

Since the heat exchanger and the outer tub are constituted by separate members, a space is formed between the heat exchanger and the outer tub, thereby increasing the size of the laundry dryer.

One object of the present invention is to widen the contact area between air and cooling water to increase the heat exchange (cooling dehumidification) efficiency and to prevent water droplets from flying to the downstream side.

Another object of the present invention is to provide a water-cooled heat exchanger (water-cooled dehumidifier) as described above in a compact size.

Another object of the present invention is to realize a water-cooled heat exchanger (water-cooled dehumidifier) as described above with a small ventilation resistance.

Another object of the present invention is to provide a compact laundry dryer as described above.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic diagram which shows the structure of the laundry dryer in 1st Embodiment of this invention.

2 (a) and 2 (b) are a longitudinal sectional front view (a) and an A-A cross sectional view (b) showing an enlarged view of a water-cooled dehumidifier (heat exchanger) of the laundry dryer shown in FIG.

3 (a) and 3 (b) are a longitudinal sectional front view (a) and an A-A cross sectional view (b) showing an enlarged view of a water-cooled dehumidifier in a second embodiment of the present invention.

4 (a) and 4 (b) are a longitudinal sectional front view (a) and an A-A cross sectional view (b) showing an enlarged view of a water-cooled dehumidifier in a third embodiment of the present invention.

5 (a) and 5 (b) are a longitudinal sectional front view (a) and an A-A cross sectional view (b) showing an enlarged view of a water-cooled dehumidifier in a fourth embodiment of the present invention.

Fig. 6 is an enlarged perspective view of a part of the water-cooled dehumidifier in the fifth embodiment of the present invention.

FIG. 7 is an enlarged perspective view of a part of the water-cooled dehumidifier in the sixth embodiment of the present invention. FIG.

Fig. 8 is an enlarged perspective view showing a part of the water-cooled dehumidifier in the seventh embodiment of the present invention.

Fig. 9 is a longitudinal sectional side view of a water-cooled dehumidifier in an eighth embodiment of the present invention.

Fig. 10 is an enlarged perspective view showing a part of the water-cooled dehumidifier in the ninth embodiment of the present invention.

11 (a) and 11 (b) are a longitudinal sectional front view (a) and an A-A cross sectional view (b) showing an enlarged view of a water-cooled dehumidifier in a tenth embodiment of the present invention.

12A and 12B are longitudinal sectional front views (a) and A-A cross-sectional views (b) illustrating an enlarged view of a water-cooled dehumidifier in an eleventh embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

3: outer bird

5: washing tank

6: stirring blade

13: water-cooled dehumidifier (heat exchanger)

14: water-cooled dehumidification duct

15: coolant

16: cooling water supply pipe

17: stone

26 opening

27: pussy

28: space

The laundry dryer of the present invention is a vertical type laundry dryer for drying laundry in a washing tank located inside an outer tank by circulating air in a washing tank for washing and dehydrating laundry with a water-cooled dehumidifier to cool and dehumidify, and circulating air in the water-cooled dehumidifier. It characterized in that the air passage to be configured integrally with the outer tank of the laundry dryer.

In addition, the laundry dryer of the present invention is a laundry dryer for drying laundry in a laundry tank by circulating air in a washing tank for washing and dehydrating laundry with a water-cooled dehumidifier to cool and dehumidify, wherein the water-cooled dehumidifier is used in a wind path for circulating air. Cooling water supply pipe for flowing out the cooling water flows down the wall surface to the upper portion of the substantially vertical wall surface, and the cooling water flow area expansion member provided in the cooling water flow region of the wall characterized in that it comprises.

In addition, the laundry dryer of the present invention is a laundry dryer for drying laundry in a laundry tank by circulating air in a washing tank for washing and dehydrating laundry with a water-cooled dehumidifier to cool and dehumidify, wherein the water-cooled dehumidifier is used in a wind path for circulating air. Cooling water supply pipe for flowing out the cooling water flows down the wall surface to the upper portion of the substantially vertical wall surface, and a member for allowing the cooling water to flow a distance longer than the approximately vertical distance of the wall surface .

In addition, the water-cooled heat exchanger of the present invention is a water-cooled heat exchanger that cools the air flowing through the ventilation paths in direct contact with the cooling water, wherein the ventilation paths, the cooling water to the wall surface on the top of the substantially vertical wall facing the air passage Cooling water supply pipe which flows out and flows down the said wall surface, and the cooling water flow area expansion member provided in the cooling water flow area of the said wall surface are characterized by the above-mentioned.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described with reference to drawings.

1 is a schematic diagram showing the configuration of a laundry dryer in the first embodiment of the present invention. 2 (a) and 2 (b) are a longitudinal sectional front view (a) and an A-A cross sectional view (b) showing an enlarged view of the water-cooled dehumidifier (heat exchanger).

The laundry dryer includes an outer tub 3 in which the upper opening 3a is opened and closed by the inner lid 4 in the outer frame 1 which is covered by the outer lid 2 so as to be openable and closed. It is suspended and supported in a dustproof state.

The outer tub 3 is rotatably supported by the washing tub 5 in which laundry is put, and the stirring blade 6 for stirring the laundry is rotatably supported by the bottom of the washing tub 5. The washing tank 5 has many small holes 5a for centrifugal dewatering and ventilation on the side wall. The electric drive 7 attached to the outer side of the bottom wall of the outer tub 3 rotationally drives the said washing tank 5 and the stirring blade 6. In addition, the drain port 3b opened in the bottom wall of the outer tub 3 is connected to the drain hose 9 via the drain solenoid valve 8.

The drying apparatus 10 which dries the laundry in the washing tank 5 draws air in the outer tank 3 from the draft port 3c provided in the side wall near the bottom of the said outer tank 3, and it cools and dehumidifies it, and continues. After heating, it blows into the washing tank 5 from the suction nozzle 11, and produces | generates the circulating air 12 and dry | cleans laundry.

The water-cooled dehumidifier (heat exchanger) 13 for water-cooling and dehumidifying the circulating air 12 is integrally molded with the outer tub 3, and is connected to an air outlet 3c formed in the outer tub 3 to form the outer tub 3. Cooling water supply pipe having a water-cooled dehumidification duct 14 having a posture that rises substantially vertically along the back surface of the side wall and a coolant outlet 16a that flows out the coolant 15 to an upper wall surface downstream of the water-cooled dehumidification duct 14. (16) and the plural steps of the protrusions 17 are provided as a cooling water flow area expansion member provided in the cooling water flow area of the said wall surface.

In Fig. 1, the projection 17 is shown in the cross section of the water-cooled dehumidification duct 14, but in practice, as shown in Figs. Install to face the circulation ventilation path. Since this water-cooled dehumidification duct 14 is provided in the narrow space with the outer frame 1 along the back surface of the outer tank 3, the cross-sectional shape of the said ventilation path has wide width which narrowed the internal length. Consists of a thin shape. Specifically, the water-cooled dehumidification duct 14 has an internal length of about 30 mm, a width of about 130 mm, and a length of about 500 mm. Therefore, in order to enlarge the contact area with the circulating air 12, cooling water flows out so that it may flow along a front and back wall surface with a large width (area). In order to reduce the increase in ventilation resistance, the plurality of steps of the protrusions 17 are arranged in a zigzag manner so as to extend in a substantially horizontal direction to the wall surfaces before and after the water-cooled dehumidification duct 14 with a height dimension of about 3 mm, and the cooling water supply pipe The cooling water 15 flowing out along the wall surface from the cooling water outlet port 16a of (16) is guided along the wall surface and zigzag in the horizontal direction by the protrusions 17 to flow down the wall surface.

The upper end (downstream) portion of the water-cooled dehumidification duct 14 is connected with a blower 18 for generating circulating air, and the circulating air 12 sent out from the blower 18 is heated to the suction nozzle 11. The heater 19 which feeds into the is provided.

In the laundry dryer constructed in this way, in the washing process, laundry is put into the washing tank 5, water is supplied with the drain solenoid valve 8 closed, the washing water is stored in the outer tank 3, and the stirring blade 6 Rotate) to wash the laundry. In the dehydration step, the drain solenoid valve 8 is opened to drain the wash water in the outer tank 3, and the washing tank 5 is rotated to perform centrifugal dewatering.

In the drying step, the washing tank 3 and / or the stirring blade 6 are rotated with the drain solenoid valve 8 open, and the blower 18 is operated to suck air in the outer tank 3. The circulating air 12 drawn out from the outlet 3c and passed through the water-cooled dehumidification duct 14 to be water-cooled and dehumidified and then heated by the heater 19 and blown from the suction nozzle 11 toward the laundry in the washing tank 5 is introduced. Create

The water-cooled dehumidification of the circulating air 12 which takes moisture from the laundry in the washing tank 5 and wets it and passes through the water-cooled dehumidification duct 14 is carried out from the cooling water outlet 16a of the cooling-water supply pipe 16 by the water-cooled dehumidification duct 14 The coolant 15 flowing out to the wall surface is guided in the zigzag state in the horizontal direction by the protrusions 17 to ride on the wall surface, and widens and flows down to a wide range of the wall surface (longer than the approximately vertical distance of the wall surface). By flowing the distance) by contacting the cooling water 15 flowing down the wall surface of the water-cooled dehumidification duct 14 when the circulating air 12 passes through the water-cooled dehumidification duct 14. .

Since the circulating air 12 ascends the inside of the water-cooled dehumidification duct 14 at a high speed, when the coolant 15 overflows from the leading edge of the protrusion 17, it is blown up to the circulating air 12 to become a droplet and then flows downstream. To the side. Therefore, the cooling water 15 flows so that the inside of each part formed by the inner wall surface of the water-cooled dehumidification duct 14 and the upper surface of the protrusion 17 does not overflow along the said protrusion 17. It is preferable to set it as. The circulating air 12 which rises in the water-cooled dehumidification duct 14 collides with the leading edge of the protrusion 17 and turbulently flows to the downstream (upper surface) side of the protrusion 17 to the upper surface and the wall surface of the protrusion 17. By contacting with the cooling water 15 flowing in each part formed by the heat exchanger, it can heat exchange and can efficiently cool and dehumidify.

According to the water-cooled dehumidifier 13, the water-cooled dehumidification duct 14 is guided along the inner wall and in a zigzag state in the horizontal direction by the protrusions 17, and is wide in the cooling water 15 flowing down the wall. The circulating air 12 can be brought into contact with each other for heat exchange to efficiently cool and dehumidify. In addition, since the protrusion 17 provided on the inner wall surface of the water-cooled dehumidification duct 14 has a low height, the increase in ventilation resistance can be reduced, and the generation of water droplets flying to the downstream side can also be prevented. . Therefore, the enlargement of the water-cooled dehumidifier 13 can also be avoided. Furthermore, since the water-cooled dehumidifier 13 is integrally molded with the outer tub 3, wasteful space is eliminated and the laundry dryer can be miniaturized.

Next, a second embodiment of the present invention will be described with reference to Figs. 3A and 3B. 3 (a) and 3 (b) are a longitudinal sectional front view (a) and an A-A cross sectional view (b) showing an enlarged view of a water-cooled dehumidifier (heat exchanger) in the second embodiment. 2nd Embodiment is characterized by the structure which arrange | positioned in two rows the protrusion provided in the multistage on the wall surface of a water cooling dehumidification duct. About the structure common to 1st Embodiment, the overlapping description is abbreviate | omitted.

In the second embodiment, the water-cooled dehumidifier 13 divides the front and rear wall surfaces in the water-cooled dehumidification duct 14 into two by the partition plate 20 in the longitudinal direction and extends substantially in each of the two divided regions. The projection 17 is arranged in multiple stages in a zigzag state, and the cooling water 15 flowing out from the cooling water outlets 16a and 16b of the cooling water supply pipe 16 along the wall surface of each row is further formed along the wall surface. By guiding in a zigzag state in the horizontal direction by the configuration is to flow down the wall surface.

The water-cooled dehumidifier 13 has two systems in which the flow paths of the cooling water 15 along the protrusion 17 become two systems, so that if the total amount of the cooling water 15 to flow down is the same, the cooling water flowing in each flow path ( The flow rate of 15) can be set to 1/2, so that the length of each protrusion 17 can be shortened and the increase in ventilation resistance can be greatly reduced.

Next, 3rd Embodiment of this invention is described with reference to FIG.4 (a) and (b). 4 (a) and 4 (b) are a longitudinal sectional front view (a) and an A-A cross sectional view (b) showing an enlarged view of the water-cooled dehumidifier in the third embodiment. This third embodiment is characterized by a configuration in which the ridges provided in multiple stages on the wall surface of the water-cooled dehumidification duct are further inclined and arranged in three rows. In the configuration common to the above-described embodiment, redundant descriptions are omitted.

In this 3rd Embodiment, the water-cooled dehumidifier 13 arrange | positions the protrusion 17 extended and inclined at about 20 degrees with respect to the horizontal direction to the front-back wall surface in the water-cooled dehumidification duct 14 in three rows in a zigzag state by three rows. Thus, the coolant 15 flowing out from the coolant outlets 16a, 16b, 16c of the coolant supply pipe 16 along the wall surface of each row is guided along the wall surface and zigzag obliquely by the projection 17 to the wall surface. It is a composition that makes it flow down. Further, the ridges 17 in the rows are arranged so as to enter the inclined side to close the rows in the area opened by the inclination of the ridges 17 in the neighboring rows so as to increase the arrangement density of the ridges 17.

In this water-cooled dehumidifier 13, since the flow path of the cooling water 15 along the protrusion 17 becomes three systems, when the total amount of the cooling water 15 to flow down is the same, the cooling water which flows into each flow path Since the flow rate of (15) can be 1/3, and the inclined protrusion 17 is easy to flow down the cooling water 15, the height of each protrusion 17 is further reduced to increase the ventilation resistance. I can greatly reduce it. In addition, since the turbulence 17 is inclined, the turbulence generated downstream of the protrusion 17 becomes a long vertical vortex, so that the ventilation resistance is further reduced. In addition, by arranging the protrusions 17 in each row, the array density becomes high, and the flow area of the cooling water 15 increases, so that the heat exchange (cooling dehumidification) efficiency can be improved.

Next, 4th Embodiment of this invention is described with reference to FIG.5 (a) and (b). 5 (a) and 5 (b) are a longitudinal sectional front view (a) and an A-A cross sectional view (b) showing an enlarged view of the water-cooled dehumidifier in the fourth embodiment. This 4th embodiment is characterized by the structure which formed the cooling water flow area expansion member by the punching metal. About the structure common to embodiment mentioned above, overlapping description is abbreviate | omitted.

In the fourth embodiment, the water-cooled dehumidifier 13 is provided with a punching metal 21 through a small gap along the front and rear walls in the water-cooled dehumidification duct 14, and the three cooling water outlets of the cooling water supply pipe 16 ( Cooling water 15 flows out along the wall surface in the water-cooled dehumidification duct 14 from 16a, 16b, and 16c, and the cooling water 15 is formed by the capillary force of the microgap between the wall surface of the water-cooled dehumidification duct 14 and the punching metal 21. ) Is flowed down to diffuse to the entire region of the micro-gap. The punching metal 21 has a plurality of openings 21a, and the coolant 15 is exposed to the air path in the opening 21a to contact the circulating air 12 to cool and dehumidify the circulating air 12. In addition, since the cooling water 15 also cools the punching metal 21, the cooling water 15 cools and dehumidifies the circulating air 12 that contacts the punching metal 21.

The circulating air 12 flowing in the water-cooled dehumidification duct 14 is turbulent due to the step by the opening 21 a of the punching metal 21. However, by forming the punching metal 21 into a thin steel material, The increase of ventilation resistance by this can be made very small.

In addition, in 4th Embodiment, even if it uses an expander mesh, a gauze, etc. instead of the punching metal 21, the same effect can be anticipated. The punching metal 21 is preferably made of a metal having excellent thermal conductivity so as not to become thermal resistance. However, when there is a problem such as cost or rust, it is also possible to change the punching metal 21 to a material such as resin.

Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 6 is an enlarged perspective view of a part of the water-cooled dehumidifier in a fifth embodiment. This fifth embodiment is characterized by the configuration in which the protrusions provided on the inner wall of the water-cooled dehumidification duct are spirally formed. In the configuration common to the above-described embodiment, redundant descriptions are omitted.

The water-cooled dehumidifier 13 in this embodiment is a structure which provides the continuous spiral protrusion 17 in four wall surfaces in the water-cooled dehumidification duct 14, and makes cooling water flow spirally to ride a wall surface.

In this fifth embodiment, since four wall surfaces in the water-cooled dehumidification duct 14 can be used as the cooling water flow down surface, the contact area between the cooling water and the circulating air can be increased. The protrusion 17 can also be comprised in several spiral shape.

Next, a sixth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a perspective view in which a part of the water-cooled dehumidifier is enlarged and used in this sixth embodiment. This sixth embodiment is characterized by a configuration in which two air passages are formed by partitioning the inside of the water-cooled dehumidification duct, and a spiral protrusion is provided on the inner wall surface of the each air passage. About the structure common to embodiment mentioned above, overlapping description is abbreviate | omitted.

In this embodiment, the water-cooled dehumidifier 13 divides the inside of the water-cooled dehumidification duct 14 into two air paths longitudinally by the partition plate 22, and the spiral protrusion 17 continuous to four wall surfaces in each air path. ), The cooling water flows down spirally to burn the wall.

In the sixth embodiment, two air paths are formed by partitioning the inside of the water-cooled dehumidification duct 14, and four wall surfaces of each air path can be used as the coolant flow down surface, thereby increasing the contact area between the coolant and the circulating air. Can be. The protrusion 17 can also be comprised in several spiral form.

Moreover, in 5th, 6th embodiment mentioned above, the spiral protrusion 17 can also be changed into the spiral hose for the water inserted along the wall surface of the water-cooled dehumidification duct 14. As shown in FIG.

Next, a seventh embodiment of the present invention will be described with reference to FIG. FIG. 8 is a perspective view in which a part of the water-cooled dehumidifier is enlarged and used in a seventh embodiment. In this seventh embodiment, the water-cooled dehumidification duct is installed so that the cooling water flowing down the wall surface of the water-cooled dehumidification duct to the lower end of the wall is blown up by the circulating air flowing into the water-cooled dehumidification duct, so that water droplets flying to the downstream are not generated. It is characterized by the configuration provided with a drain guide convex portion at the lower end of the. About the structure common to embodiment mentioned above, overlapping description is abbreviate | omitted.

In this embodiment, the water-cooled dehumidifier 13 is connected to the suction port 3c which provided the lower end part of the water-cooled dehumidification duct 14 in the outer tank 3. As shown in FIG. The circulating air 12 flowing in the horizontal direction from the suction port 3c to the lower end of the water cooling dehumidification duct 14 is along the water cooling dehumidification duct 14 at the lower end of the water cooling dehumidification duct 14 in a substantially vertical state. Reorient to rise approximately vertically. When the cooling water 15 flows down to the lower end of the wall surface inside the water-cooled dehumidifying duct 14 facing the direction change site, the cooling water 15 falls down from the lower edge of the wall surface into the air passage, and the circulating air 12 To blow water droplets up). The drain guide convex portion 23 is provided with a partition plate 24 formed at both ends of the cooling water 15 that flows down the protrusion 17 into the lower portion of the wall surface inside the water-cooled dehumidification duct 14. It is configured so that it is guided to the pubic part so that the flow velocity does not sag in the form of flowing into the fast circulating air 12.

A drain port 24a is formed in the partition plate 24, and the cooling water 15 stayed in the groove is introduced into the outer tub 3 along the bottom wall surface of the draft port 3c.

By constructing the lower end portion of the water-cooled dehumidification duct 14 as in this embodiment, it is possible to prevent the generation of water droplets which are injured upstream and downstream.

Next, an eighth embodiment of the present invention will be described with reference to FIG. 9 is a longitudinal side view of the water-cooled dehumidifier in the eighth embodiment. 8th Embodiment is characterized by the structure which provided the heat exchanger plate along the air path into the water cooling dehumidification duct, and provided the protrusion on the surface of this heat exchanger plate. About the structure common to above-mentioned embodiment, the overlapping description is abbreviate | omitted.

In this embodiment, the water-cooled dehumidifier 13 installs the metal heat exchanger plate 25 in the vertical state at the substantially intermediate position of the front-back direction in the water-cooled dehumidification duct 14, and moves the inside of the water-cooled dehumidification duct 14 back and forth. I'm splitting vertically into two parts. The heat exchanger plate 25 is provided with a protrusion 17 similar to the above-described embodiment on the wall surface of the rear side (right side in the drawing), and the lower end portion of the heat exchanger plate 25 is provided on the side wall of the outer tank 3. The guide portion 25a is formed by bending toward the provided suction port 3c. The protrusion 17 is not provided in this guide part 25a. Then, the cooling water 15 is configured to flow out from the cooling water outlet 16a of the cooling water supply pipe 16 onto the wall surface on the rear side.

The water-cooled dehumidifier 13 smoothly classifies the circulating air 12 flowing from the air outlet 3c into the front and rear flow paths by the lower end portion 25a of the heat exchanger plate 25. The circulating air 12 classified into the rear flow path is formed by the cooling water 15 and the cooling water 15 flowing down along the protrusion 17 like the circulation air 12 in the above-described embodiment. It cools and dehumidifies a contact with the cooled heat exchanger plate 25. In addition, the circulating air 12 classified into the front flow path contacts the heat exchange plate 25 cooled by the cooling water 15 to cool and dehumidify.

The cooling water 15 flowing down the wall surface on the rear side of the heat exchanger plate 25 is configured such that both ends of the space on the rear side of the guide portion 25a flow down to prevent water droplets flying to the downstream side. do.

Next, a ninth embodiment of the present invention will be described with reference to FIG. 10 is a perspective view in which a part of the water-cooled dehumidifier is enlarged and used in a ninth embodiment. In the ninth embodiment, a heat exchange plate is provided along the air passage so that the inside of the water-cooled dehumidification duct is divided into two directions, and the space for smoothly dividing the projections and the openings into the flow path divided into the lower end portions is provided on the surface of the heat exchange plate. There is a characteristic in the installed configuration. In the configuration common to the above-described embodiment, redundant descriptions are omitted.

In this embodiment, the water-cooled dehumidifier 13 installs the metal heat exchanger plate 25 in the vertical state at the substantially intermediate position of the front-back direction in the water-cooled dehumidification duct 14, and moves the inside of the water-cooled dehumidification duct 14 back and forth. I'm splitting vertically into two parts. The heat exchange plate 25 is provided with the projection 17 and the opening portion 26 as in the above-described embodiment on the wall surface of the rear side (right side in the drawing), and the above-described bottom portion of the heat exchange plate 25 is described above. As in the embodiment, the drain guide convex portion 23 is provided to prevent the water droplets from escaping. The heat exchanger plate 25 lower than the drainage guide convex portion 23 is removed to configure the coolant 15 to flow out from the coolant outlet 16a of the coolant supply pipe 16 onto the rear wall.

This water-cooled dehumidifier 13 is connected to the suction port 3c provided with the lower end part of the water-cooled dehumidification duct 14 in the outer tank 3. As shown in FIG. The circulating air 12 flowing in the horizontal direction from the suction port 3c to the lower end of the water-cooled dehumidification duct 14 is along the water-cooled dehumidification duct 14 at the lower end of the water-cooled dehumidification duct 14 in a substantially vertical state. Reorient to rise approximately vertically. A space 28 for equally restoring the velocity distribution of the circulating air 12 flowing into the redirection portion is provided. The space 28 smoothly classifies the circulating air 12 into the front and rear flow passages. And the circulation air 12 classified into the flow path of the back side is the cooling water 15 and the said cooling water 15 which flow down along the protrusion 17 like the circulation air 12 in the above-mentioned embodiment. It cools and dehumidifies a contact with the cooled heat exchanger plate 25. In addition, a part of the circulating air 12 along the protrusion 17 passes through the opening 26 located below the protrusion 17 to promote cooling of the lower surface of the protrusion 17. In addition, the circulating air 12 classified into the front flow path contacts the heat exchange plate 25 cooled by the cooling water 15 to cool and dehumidify.

Cooling water 15 flowing down the wall surface on the rear side of the heat exchanger plate 25 flows from both ends of the heat exchanger plate 25 by the drain guide convex portion 23 and is formed by the draft port 3c. Guided to the trough 27, it flows into the outer tub 3 along the bottom wall surface of the intake port 3c without being flowed into the fast circulating air 12. By such a configuration, it is possible to prevent the generation of water droplets flying to the downstream side.

Next, a tenth embodiment of the present invention will be described with reference to Figs. 11A and 11B. 11A and 11B are longitudinal sectional front views (a) and A-A cross sectional views showing an enlarged view of a water-cooled dehumidifier in a tenth embodiment. 10th Embodiment is characterized by the structure which provided the heat exchanger plate along the air path in the water-cooled dehumidification duct, and arrange | positioned the some protrusion extended in the perpendicular direction to the surface of this heat exchanger plate in the horizontal direction. About the structure common to above-mentioned embodiment, the overlapping description is abbreviate | omitted.

In the water-cooled dehumidifier 13 in this embodiment, a plurality of protrusions 17 extending in a direction substantially perpendicular to the surface of the heat exchange plate 25 are provided side by side in the transverse direction at intervals, and each protrusion 17 is provided. The cooling water 15 flows from the plurality of cooling water outlets 16a of the cooling water supply pipe 16 in between.

In the tenth embodiment, by increasing the number of the protrusions 17, the contact area between the cooling water 15 and the circulating air 12 can be increased, thereby improving heat exchange performance.

Next, an eleventh embodiment of the present invention will be described with reference to Figs. 12A and 12B. 12A and 12B are longitudinal sectional front views (a) and A-A cross sectional views showing an enlarged view of the water-cooled dehumidifier in the eleventh embodiment. The eleventh embodiment is characterized in that a heat exchange plate is provided along the air path into the water-cooled dehumidification duct, and the cooling water flows into the surface of the heat exchange plate in a shower. About the structure common to above-mentioned embodiment, the overlapping description is abbreviate | omitted.

In the eleventh embodiment, the water-cooled dehumidifier 13 is provided with a plurality of protrusions 17 extending in a substantially vertical direction on the surface of the heat exchanger plate 25 side by side in the transverse direction at intervals, and each protrusion 17 The cooling water 15 flows out from each cooling water outlet port 16a of the cooling water supply pipe 16 to the shower type (to be widened in the fan shape) and flows in between the protrusions 17).

Also in embodiment, by increasing the number of the protrusions 17, the contact area of the cooling water 15 and the circulating air 12 can be enlarged, and heat exchange performance can be improved.

In each embodiment described above, the protrusion 17 can also be changed into a concave groove constituting such a channel. It is also possible to provide a projection 17 or a concave groove on both sides of the heat exchanger plate 25 to further increase the contact area between the cooling water 15 and the circulating air 12. Further, by providing a small convex concave-convex or porous surface on the surface of the heat exchanger plate 25, the wet diffusion of the cooling water 15 can be expanded, and the contact area with the circulating air 12 can be enlarged. In addition, the heat exchanger plate 25 and the projection 17 are preferably made of a metal having excellent thermal conductivity so as not to become thermal resistance. have.

In addition, in each embodiment described above, the discharge direction of the cooling water 15 from the cooling water outlet 16a of the cooling water supply pipe 16 is the inner wall side or the heat of the water-cooled dehumidification duct 14 rather than the direction directly below the cooling water supply pipe 16. By discharging toward the exchange plate 25 side, it can be further prevented from being blown up to the circulating air 12 and the water droplets escaping.

And such a water-cooled dehumidifier (heat exchanger) can be used for a clothes dryer, a food washing dryer, or the like.

The present invention provides a cooling water supply pipe for discharging cooling water to the wall surface and flowing down the wall surface on an upper part of a substantially vertical wall surface facing the air path, and a cooling water flow area enlargement member provided in the cooling water flow region of the wall surface. By providing the contact area between air and cooling water, the efficiency of heat exchange (cooling and dehumidification) can be increased, and water droplets can be prevented from escaping from the air downstream.

In addition, by expanding the flow area of the cooling water, the water-cooled heat exchanger (water-cooled dehumidifier) can be made compact.

In addition, it is possible to reduce the ventilation resistance of the water-cooled heat exchanger (water-cooled dehumidifier) by making the member discharged to the ventilation path small.

In addition, since the water-cooled dehumidifier is integrally formed with the outer tank, unnecessary space is eliminated, and the laundry dryer can be made compact.

Claims (9)

A vertical laundry dryer for drying laundry in a washing tank located inside an outer tank by circulating air in a washing tank for washing and dehydrating laundry to a water-cooled dehumidifier and cooling and dehumidifying the same. The air dryer for circulating the air of the said water-cooled dehumidifier was comprised integrally with the outer tank of the said laundry dryer. A laundry dryer for drying laundry in a washing tank by circulating air in a washing tank for washing and dehydrating laundry with a water-cooled dehumidifier and cooling and dehumidifying the same. The water-cooled dehumidifier has a cooling water supply pipe that flows cooling water down to the wall surface and flows down the wall surface on an approximately vertical wall surface facing an air path for circulating air, and a cooling water installed in the cooling water flow down region of the wall surface. A laundry dryer comprising a lowering area enlargement member. A laundry dryer for drying laundry in a washing tank by circulating air in a washing tank for washing and dehydrating laundry with a water-cooled dehumidifier and cooling and dehumidifying the same. The water-cooled dehumidifier has a cooling water supply pipe that flows cooling water down the wall surface and flows down the wall surface on an approximately vertical wall surface facing an air path for circulating air, and a distance longer than the approximately vertical distance of the wall surface. And a member for flowing down the laundry. In a water-cooled heat exchanger that cools the air flowing through the ventilation path to the cooling water directly The ventilation path includes a cooling water supply pipe configured to allow the coolant to flow out on the wall surface and flow down the wall surface on the upper part of the substantially vertical wall surface facing the air path, and the cooling water flow area enlargement member installed in the coolant flow region of the wall surface. Water-cooled heat exchanger comprising a. The water-cooled heat exchanger according to claim 4, wherein the cooling water flow area enlargement member is constituted by a plurality of steps of protrusions provided on the wall surface. 6. The water-cooled heat exchanger according to claim 5, wherein the protrusions are arranged in a zigzag. The water cooling heat exchanger according to claim 4, wherein the cooling water flow area enlargement member is constituted by a thin mesh type member such as a punching metal, an expander mesh or a gauze, or a member provided with a plurality of small pores. 5. The water-cooled heat exchanger according to claim 4, wherein the cooling water flow area enlargement member has a plurality of protrusions arranged so as to extend in a direction perpendicular to the wall surface in a lateral direction. A laundry dryer for drying laundry in a washing tank by circulating air in a washing tank for washing and dehydrating laundry with a water-cooled dehumidifier to cool and dehumidify, wherein the cooling water of the water-cooled dehumidifier is slower than the main flow rate of air in the air inlet of the water-cooled dehumidifier. Laundry dryer, characterized in that as directed.