JP2002346272A - Washing and drying machine and water cooled heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a heat exchanger with high efficiency in cooling and dehumidifying. SOLUTION: Projected lines 17 are arranged on the wall surface of a water cooled dehumidifying duct 14 in the water cooled dehumidifier of a washing and drying machine, cooling water 15 flowing down on the wall surface is guided in a zigzag so that a flow-down area is made wide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A washing / drying machine for washing, dewatering and drying includes a water-cooled heat exchanger for water-cooling and dehumidifying air sucked from a washing tub by a blower as described in JP-A-11-347282. A heater for heating dehumidified air and blowing it into the washing tub. The water-cooled heat exchanger supplies cooling water into a dehumidifying duct that dehumidifies the humid air sucked out of the washing tub, and splashes water droplets of the cooling water by the flow of the air flowing through the dehumidifying duct to form air and cooling water. It is configured to enhance the heat exchange (cooling and dehumidifying) efficiency due to the contact of.

[0003]

However, in a washing / drying machine, since a heater for heating air is present downstream of the water-cooled heat exchanger, water droplets generated in the heat exchanger get on the circulating air. Therefore, it is necessary not to fly to the position of the heater.

If a room for dropping water droplets at the outlet of the heat exchanger is provided to stop the water droplets generated in the heat exchanger in the heat exchanger, the heat exchanger becomes large, and the water droplet shielding ribs are provided. In this case, there is a problem that the ventilation resistance increases and the ventilation amount decreases.

An object of the present invention is to increase the contact area between air and cooling water to increase the heat exchange (cooling and dehumidifying) efficiency and to prevent water droplets from flying on the air and traveling downstream.

Another object of the present invention is to make the above-mentioned water-cooled heat exchanger (water-cooled dehumidifier) compact.

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

[0008]

The washing and drying machine of the present invention comprises:
In a washing / drying machine for drying laundry in a washing tub by circulating air in a washing tub for washing and dehydrating laundry through a water-cooled dehumidifier to cool and dehumidify the laundry, the water-cooled dehumidifier circulates air. A cooling water supply pipe for allowing cooling water to flow out to the upper surface of the substantially vertical wall surface facing the wind path to flow down the wall surface, and a cooling water flowing area provided in a cooling water flowing region of the wall surface It is characterized by having an enlarging member.

Further, the water-cooled heat exchanger of the present invention is a water-cooled heat exchanger for cooling by bringing air flowing through a ventilation path into direct contact with cooling water, wherein the ventilation path is substantially vertical facing the air path. A cooling water supply pipe for flowing cooling water to the wall surface and flowing down the wall surface, and a cooling water falling area enlarging member provided in a cooling water falling region of the wall surface on an upper portion of the wall surface. And

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing a configuration of a washing / drying machine according to a first embodiment of the present invention. FIG. 2 is a longitudinal sectional front view (a) showing the water-cooled dehumidifier (heat exchanger) in an enlarged manner and an AA sectional view (b) thereof.

This washing and drying machine has an upper end opening 3a in an outer frame 1 in which a clothes input port 1a is opened and closed by an outer lid 2.
The outer tub 3, which can be opened and closed by an inner lid 4, is suspended and supported in a vibration-proof state.

A washing tub 5 for storing laundry is rotatably supported in the outer tub 3, and a stirring blade 6 for stirring the laundry is rotatably supported at the bottom of the washing tub 5. The washing tub 5 has a number of small holes 5a for centrifugal dehydration and ventilation on the side wall. An electric driving device 7 attached to the outside of the bottom wall of the outer tub 3 drives the washing tub 5 and the stirring blade 6 to rotate. In addition, outer tank 3
The drain port 3 b opened on the bottom wall of the is connected to a drain hose 9 via a drain solenoid valve 8.

The drying device 10 for drying the laundry in the washing tub 5 sucks air from the outer tub 3 through a suction port 3c provided on a side wall near the bottom of the outer tub 3, dehumidifies with water, and then heats. Later, the air is blown into the washing tub 5 from the blowing nozzle 11 to generate circulating air 12 to dry the laundry.

A water-cooled dehumidifier (heat exchanger) 13 for cooling and dehumidifying the circulating air 12 is provided with a suction port 3 c formed in the outer tank 3.
And a water cooling dehumidification duct 14 that stands substantially vertically along the back surface of the side wall of the outer tub 3, and a cooling water outlet 16 a through which cooling water 15 flows out to an upper wall surface downstream of the water cooling dehumidification duct 14. And a plurality of ridges 17 as cooling water falling area expanding members provided in the cooling water falling area of the wall surface.

In FIG. 1, the ridges 17 are shown on the end face of the water-cooled dehumidifying duct 14, but actually, as shown in FIG. 2, they are located on the front and rear wide side walls and face the circulation ventilation passage. To be provided. This water-cooled dehumidification duct 14 is
The air passage is set in a narrow space between the outer frame 1 and the outer frame 1 along the back surface of the air passage. Specifically, the water-cooled dehumidifying duct 14 has a depth dimension of about 30 mm and a width dimension of 13 mm.
The length is about 0 mm and the length is about 500 mm. Therefore, the cooling water flows down along the front and rear wall surfaces having a large width (area) in order to increase a contact area with the circulating air 12. The plurality of ridges 17 are arranged in a zigzag manner so as to extend in a substantially horizontal direction on the front and rear wall surfaces of the water-cooling and dehumidifying duct 14 with a height of about 3 mm in order to reduce an increase in ventilation resistance. The cooling water 15 which has flowed out from the cooling water outlet 16a of the pipe 16 along the wall surface is caused to flow down the wall surface while being guided in a zigzag manner along the wall surface and horizontally by the ridges 17.

A blower 18 for generating circulating air is connected to the upper end (downstream) of the water-cooled dehumidifying duct 14, and a heater 19 for heating the circulating air 12 sent from the blower 18 and sending it to the blowing nozzle 11. Is provided.

In the washing / drying machine constructed as described above, in the washing process, laundry is put into the washing tub 5, water is supplied with the drainage electromagnetic valve 8 closed, and the washing water is collected in the outer tub 3. The laundry is washed by rotating the stirring blade 6. In the dewatering step, the drainage electromagnetic valve 8 is opened to drain the washing water in the outer tub 3, and the washing tub 5 is rotated to perform centrifugal dehydration.

In the drying step, the washing tub 3 and / or the stirring blade 6 are rotated with the drainage electromagnetic valve 8 opened, and the blower 18 is operated to suck the air in the outer tub 3 from the suction port 3c. After passing through the water-cooled dehumidification duct 14 to perform water-cooled dehumidification, the air is heated by the heater 19 to generate circulating air 12 that is blown from the blowing nozzle 11 toward the laundry in the washing tub 5.

The water-cooled dehumidification of the circulating air 12 passing through the water-cooling dehumidification duct 14 by removing moisture from the laundry in the washing tub 5 and passing through the water-cooling dehumidification duct 14 is carried out from the cooling water outlet 16 a of the cooling water supply pipe 16. The cooling water 15 flowing out to the wall surface is guided in a zigzag state in the horizontal direction by the ridges 17 and spreads over a wide area of the wall surface to flow down. The cooling water 15 flowing down the wall surface of the water-cooled dehumidifying duct 14 when passing through the cooling water 15 is brought into contact with a large area.

Since the circulating air 12 is rising at a high speed in the water-cooled dehumidifying duct 14, when the cooling water 15 overflows from the leading edge of the ridge 17, it is blown up by the circulating air 12 to become water droplets and become downstream. Will fly. Accordingly, it is desirable that the flow rate of the cooling water 15 is such that the cooling water 15 does not overflow along the ridges 17 in the corner formed by the inner wall surface of the water-cooled dehumidifying duct 14 and the upper surface of the ridges 17. The circulating air 12 rising in the water-cooled dehumidifying duct 14 is
And turbulently flows on the downstream side (upper surface) of the ridges 17 so as to be in good contact with the cooling water 15 flowing along the corner formed by the upper surface and the wall surface of the ridges 17 to exchange heat. In addition, cooling and dehumidification can be performed efficiently.

According to such a water-cooling type dehumidifier 13, the water-cooling dehumidification duct 14 is provided with the cooling water 15 flowing down the wall surface while being guided in a zigzag state along the inner wall surface and in the horizontal direction by the ridges 17. The circulating air 12 is brought into good contact with the circulating air in a wide range to perform heat exchange, thereby efficiently cooling and dehumidifying. Moreover, since the ridges 17 provided on the inner wall surface of the water-cooled dehumidifying duct 17 are short, the increase in ventilation resistance can be reduced, and the generation of water droplets that fly downstream is prevented. You can also. Therefore, the size of the water-cooled dehumidifier 13 can be avoided.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is an enlarged longitudinal front view (a) and an AA sectional view (b) showing a water-cooled dehumidifier (heat exchanger) according to the second embodiment in an enlarged manner. The second embodiment is characterized in that the ridges provided in multiple stages on the wall surface of the water-cooled dehumidifying duct are arranged in two rows. For the configuration common to the first embodiment, a duplicate description will be omitted.

The water-cooling type dehumidifier 13 in the second embodiment divides the front and rear wall surfaces in the water-cooling dehumidification duct 14 into two vertically by a partition plate 20, and applies a substantially horizontal direction to each of the two divided regions. Ridges 17 extending in a zigzag manner are arranged in multiple stages, and the cooling water outlet 1 of the cooling water supply pipe 16 is provided.
The cooling water 15 which has flowed out along the wall surface of each row from 6a, 16b is guided along the wall surface and in a horizontal zigzag state by the ridges 17 to flow down the wall surface while flowing down.

Such a water-cooled dehumidifier 13 has a ridge 17
The flow path of the cooling water 15 flowing along each of the two flow paths can be reduced to １ ／ if the total amount of the cooling water 15 flowing down is the same. The height of each ridge 17 can be reduced to greatly reduce the increase in ventilation resistance.

Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 4 is an enlarged longitudinal front view of the water-cooled dehumidifier according to the third embodiment (a).
FIG. 2 is a cross-sectional view taken along line AA of FIG. The third embodiment is characterized in that the ridges provided in multiple stages on the wall surface of the water-cooled dehumidifying duct are arranged in three rows and inclined. For the configuration common to the above-described embodiment, the duplicate description will be omitted.

The water-cooling type dehumidifier 13 of the third embodiment has three rows of ridges 17 extending on the front and rear wall surfaces of the water-cooling dehumidification duct 14 at an angle of about 20 degrees with respect to the horizontal direction. The cooling water supply pipes 16 are arranged in multiple stages in a zigzag state.
The cooling water 15 which flows out along the wall surface of each row from the cooling water outlets 16a, 16b, 16c is guided down the wall surface along the wall surface and in a diagonal zigzag state by the ridges 17 to flow down. Configuration. Further, the ridges 17 in each row are arranged so that the inclined side of each row is closed so as to enter a region opened by the inclination of the ridges 17 in the adjacent row so as to increase the arrangement density of the ridges 17. ing.

Such a water-cooled dehumidifier 13 has a ridge 17
The flow path of the cooling water 15 flowing along each flow path can be reduced to １ ／ if the total amount of the cooling water 15 flowing down is the same. Since the cooling water 15 easily flows down on the inclined ridges 17, the height of each ridge 17 can be further reduced to greatly reduce the increase in ventilation resistance. In addition, since the ridge 17 is inclined, the turbulence generated downstream of the ridge 17 becomes a vertically long vortex, so that the ventilation resistance is further reduced. In addition, the ridges 17 in each row are arranged so as to be intricate, so that the arrangement density is increased, the flow area of the cooling water 15 is increased, and the heat exchange (cooling and dehumidifying) efficiency can be increased.

Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 is an enlarged longitudinal front view of the water-cooled dehumidifier in the fourth embodiment (a).
FIG. 2 is a cross-sectional view taken along line AA of FIG. The fourth embodiment is characterized in that the cooling water downflow area enlarging member is formed by punching metal. For the configuration common to the above-described embodiment, the duplicate description will be omitted.

In the water-cooled dehumidifier 13 of the fourth embodiment, a punching metal 21 is provided with a minute gap along the front and rear wall surfaces in a water-cooled dehumidifier duct 14.
Three cooling water outlets 16a, 16 of the cooling water supply pipe 16
b, 16c, the cooling water 15 flows out along the wall surface inside the water-cooled dehumidifying duct 14, and the cooling water 15 is spread over the entire area of the minute gap by the capillary force of the minute gap between the wall surface of the water-cooled dehumidifying duct 14 and the punching metal 21. This is a configuration in which the flow is made to spread. The punching metal 21 has many openings 2
The cooling water 15 is exposed to the air passage in the opening 21a and comes into contact with the circulating air 12 to cool and dehumidify the circulating air 12. The cooling water 15 also cools and dehumidifies the circulating air 12 that contacts the punching metal 21 because it also cools the punching metal 21.

Circulating air 1 flowing through water-cooled dehumidifying duct 14
The turbulent flow 2 is caused by a step due to the opening 21a of the punching metal 21, but by forming the punching metal 21 with a thin steel material, an increase in ventilation resistance due to the turbulent flow can be extremely reduced.

In the fourth embodiment, the same effect can be expected by using an expander mesh, gauze, or the like in place of the punching metal 21 in the cooling water flow area enlarging member in the fourth embodiment. The punching metal 21
It is preferable to use a metal having excellent thermal conductivity so as not to cause thermal resistance. However, if there is a problem such as cost or rust, it can be changed 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 showing a part of the water-cooled dehumidifier in the fifth embodiment.
The fifth embodiment is characterized in that a ridge provided on the inner wall of a water-cooled dehumidifying duct is formed in a spiral shape. For the configuration common to the above-described embodiment, the duplicate description will be omitted.

The water-cooled dehumidifier 13 in this embodiment
In this configuration, continuous spiral ridges 17 are provided on four wall surfaces in the water-cooled dehumidifying duct 14, and the cooling water flows down the wall surface in a spiral manner.

In the fifth embodiment, since the four walls in the water-cooled dehumidifying duct 14 can be used as the lower surface of the cooling water flow, the contact area between the cooling water and the circulating air can be increased. The ridge 17 may be formed in a plurality of spiral shapes.

Next, a sixth embodiment of the present invention will be described with reference to FIG. FIG. 7 is an enlarged perspective view showing a part of the water-cooled dehumidifier according to the sixth embodiment. The sixth embodiment is characterized in that two air passages are formed by partitioning the inside of a water-cooled dehumidification duct, and a spiral ridge is provided on the inner wall surface of each air passage. For the configuration common to the above-described embodiment, the duplicate description will be omitted.

The water-cooled dehumidifier 13 in this embodiment
Divides the inside of the water-cooled dehumidifying duct 14 into two vertically divided air passages by a partition plate 22, provides continuous spiral ridges 17 on four wall surfaces in each air passage, and transmits cooling water through the wall surface. In this configuration, the fluid flows down spirally.

In the sixth embodiment, two air passages are formed by partitioning the inside of the water-cooled dehumidifying duct 14, and the four wall surfaces of each air passage can be used as the lower surface of the cooling water flow.
The contact area between the cooling water and the circulating air can be increased. The ridge 17 may be formed in a plurality of spiral shapes.

The spiral ridge 17 in the fifth and sixth embodiments can be replaced with a water-flowing spiral hose inserted along the wall surface of the water-cooling and dehumidifying duct 14.

Next, a seventh embodiment of the present invention will be described with reference to FIG. FIG. 8 is an enlarged perspective view showing a part of the water-cooled dehumidifier according to the seventh embodiment. In the seventh embodiment, the cooling water flowing down the wall surface of the water-cooled dehumidifying duct and flowing to the lower end of the wall surface is prevented from being blown up by the circulating air flowing into the water-cooled dehumidifying duct so that water droplets that fly downstream are not generated. The water-cooled dehumidification duct is characterized in that a drain guide projection is provided at the lower end thereof. For the configuration common to the above-described embodiment, the duplicate description will be omitted.

In this embodiment, a water-cooled dehumidifier 1
Numeral 3 connects the lower end of the water-cooled dehumidifying duct 14 to a suction port 3c provided in the outer tank 3. Circulating air 1 flowing horizontally from suction port 3c to the lower end of water-cooled dehumidifying duct 14
2 changes direction so as to rise substantially vertically along the water-cooled dehumidification duct 14 at the lower end of the water-cooled dehumidification duct 14 in a substantially vertical state. When the cooling water 15 flows down to the lower edge of the wall surface inside the water-cooling dehumidifying duct 14 facing the direction change portion, the cooling water 15 drips from the lower edge of the wall surface into the air passage, and the circulating air 12 The water droplets fly by being blown up. The drainage guide convex portion 23 guides the cooling water 15 flowing down along the ridge 17 to the lower portion of the wall surface inside the water-cooled dehumidifying duct 14 to the shade portion of the ventilation formed by the partition plates 24 at both ends, and circulates at a high flow rate. It is configured not to hang down in a form exposed to the air 12.

A drain port 24a is formed in the partition plate 24,
The cooling water 15 that has accumulated in the hidden part is caused to flow into the outer tub 3 along the bottom wall surface of the suction port 3c.

By forming the lower end of the water-cooled dehumidifying duct 14 as in this embodiment, it is possible to prevent the generation of water droplets that fly to the downstream and become obstacles.

Next, an eighth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a vertical sectional side view of the water-cooled dehumidifier in the eighth embodiment. The eighth embodiment is characterized in that a heat exchange plate is installed along a wind path in a water-cooled dehumidification duct, and a protrusion is provided on the surface of the heat exchange plate. For the configuration common to the above-described embodiment, the duplicate description will be omitted.

The water-cooled dehumidifier 13 in this embodiment
A metal heat exchange plate 25 is installed vertically at a substantially middle position in the front-rear direction in the water-cooling dehumidification duct 14, and the inside of the water-cooling dehumidification duct 14 is vertically divided so as to be divided into two. The heat exchange plate 25 is provided with a ridge 17 similar to that of the above-described embodiment on a rear wall surface (right side in the figure), and a lower end of the heat exchange plate 25 is provided with a suction port provided on a side wall of the outer tub 3. The guide portion 25a is formed by being curved toward 3c. This guide part 25a
Does not have the ridge 17. And the cooling water supply pipe 16
From the cooling water outlet 16a on the rear wall surface.
5 to flow out.

In such a water-cooled dehumidifier 13, the circulating air 12 flowing from the suction port 3 c is smoothly divided by the lower end 25 a of the heat exchange plate 25 into the front and rear flow paths. The circulating air 12 diverted to the rear flow path is, like the circulating air 12 in the above-described embodiment, the cooling water 15 flowing down along the ridges 17 and the heat exchange cooled by the cooling water 15. Cooling and dehumidification is performed by touching the plate 25. Further, the circulating air 12 diverted to the front channel is brought into contact with 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 exchange plate 25 is configured to flow down both ends of the space behind the guide portion 25a, thereby generating water droplets flying to the downstream side. To prevent

Next, a ninth embodiment of the present invention will be described with reference to FIG. FIG. 10 is an enlarged vertical sectional front view (a) of the water-cooled dehumidifier according to the ninth embodiment and a sectional view taken along the line AA. This ninth embodiment has a configuration in which a heat exchange plate is installed along a wind path in a water-cooled dehumidification duct, and a plurality of ridges extending in a vertical direction on the surface of the heat exchange plate are arranged side by side. There are features. For the configuration common to the above-described embodiment, the duplicate description will be omitted.

The water-cooled dehumidifier 13 in this embodiment
A plurality of ridges 17 extending in a substantially vertical direction are arranged side by side on the surface of the heat exchange plate 25 at intervals, and a plurality of cooling water outlets of the cooling water supply pipe 16 are provided between the ridges 17. 16
This is a configuration in which cooling water 15 flows down from a.

In the ninth embodiment, the contact area between the cooling water 15 and the circulating air 12 can be increased by increasing the number of the ridges 17 to improve the heat exchange performance.

Next, a tenth embodiment of the present invention will be described.
This will be described with reference to FIG. FIG. 11 is an enlarged vertical sectional front view (a) of the water-cooled dehumidifier according to the tenth embodiment and a sectional view taken along line AA. The tenth embodiment is characterized in that a heat exchange plate is provided along a wind path in a water-cooled dehumidification duct, and cooling water is poured into the surface of the heat exchange plate in a shower shape. For the configuration common to the above-described embodiment, the duplicate description will be omitted.

In the water-cooled dehumidifier 13 according to the tenth embodiment, a plurality of ridges 17 extending in a substantially vertical direction on the surface of a heat exchange plate 25 are arranged side by side at intervals with each other. The cooling water 15 flows out from one cooling water outlet 16a of the cooling water supply pipe 16 in the form of a shower (to spread out in a fan shape) between the ridges 17, and flows between the ridges 17 to flow down. .

In this embodiment as well, the contact area between the cooling water 15 and the circulating air 12 can be increased by increasing the number of the ridges 17 to improve the heat exchange performance.

The ridge 17 in each of the embodiments described above.
Can be changed to a concave line forming a similar water channel. In addition, the contact area between the cooling water 15 and the circulating air 12 can be further increased by providing the protrusions 17 or the recesses on both surfaces of the heat exchange plate 25. It is desirable that the heat exchange plate 25 and the ridges 17 be made of a metal having excellent thermal conductivity so as not to cause thermal resistance. However, if there is a problem such as cost or rust, a material such as resin is used. Can be changed.

Such a water-cooled dehumidifier (heat exchanger) can be used for a clothes dryer, a dishwasher, and the like.

[0056]

According to the present invention, there is provided a cooling water supply pipe for flowing cooling water to an upper portion of a substantially vertical wall surface facing an air path, flowing the cooling water down the wall surface, and flowing down the cooling water flowing down the wall surface. By providing the cooling water flow area expansion member provided in the area,
By increasing the contact area between the air and the cooling water, the heat exchange (cooling and dehumidifying) efficiency can be increased, and the water droplets can be prevented from flying downstream on the air.

Also, by increasing the area under which the cooling water flows, the water-cooled heat exchanger (water-cooled dehumidifier) can be made compact.

Further, the size of the members to be discharged to the ventilation passage can be reduced, so that the ventilation resistance of the water-cooled heat exchanger (water-cooled dehumidifier) can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a configuration of a washing / drying machine according to a first embodiment of the present invention.

FIG. 2 is an enlarged longitudinal front view (a) and a cross-sectional view taken along line AA of the water-cooled dehumidifier (heat exchanger) of the washing and drying machine shown in FIG. 1;

FIGS. 3A and 3B are a longitudinal sectional front view (a) and an AA sectional view (b) showing an enlarged view of a water-cooled dehumidifier according to a second embodiment of the present invention.

FIG. 4 is an enlarged vertical sectional front view (a) and a cross-sectional view taken along line AA (b) of a water-cooled dehumidifier according to a third embodiment of the present invention.

FIG. 5 is an enlarged longitudinal front view (a) and an AA cross-sectional view (b) of a water-cooled dehumidifier according to a fourth embodiment of the present invention.

FIG. 6 is an enlarged perspective view showing a part of a water-cooled dehumidifier according to a fifth embodiment of the present invention.

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

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

FIG. 9 is a vertical sectional side view of a water-cooled dehumidifier according to an eighth embodiment of the present invention.

FIG. 10 is an enlarged longitudinal front view (a) and an AA sectional view (b) showing a water-cooled dehumidifier in a ninth embodiment of the present invention in an enlarged manner.

FIGS. 11A and 11B are a longitudinal sectional front view (a) and an AA sectional view (b) showing an enlarged view of a water-cooled dehumidifier according to a tenth embodiment of the present invention.

[Explanation of symbols]

3 outer tub, 5 washing tub, 6 stirring blade, 13 water-cooled dehumidifier (heat exchanger), 14 water-cooled dehumidifying duct, 15 cooling water, 16 cooling water supply pipe, 17 ridge.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Nobuo Fujieda 502 Kandate-cho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratories, Hitachi, Ltd. Inside the Mechanical Research Laboratory (72) Inventor Tsuneshi Komatsu 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside Hitachi Taga Electronics Co., Ltd. (72) Inventor Hideaki Munegata 1-1-1, Higashitaga-machi, Hitachi City, Ibaraki Prefecture Hitachi Taga Electronics Co., Ltd. (72) Inventor Kenichi Ogoshi 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki F-term (reference) 3B155 AA16 BB18 CB18 CB53 CB53 MA01 MA02 4L019 AA02

Claims (6)

[Claims] 1. A washing / drying machine for drying laundry in a washing tub by circulating air in a washing tub for washing and dehydrating laundry through a water-cooled dehumidifier to cool and dehumidify the laundry. A cooling water supply pipe for flowing out cooling water to the upper surface of a substantially vertical wall surface facing an air path for circulating air and flowing down the wall surface, and a cooling water supply pipe provided in a cooling water flowing down area of the wall surface. A washing and drying machine comprising a cooling water flow area increasing member. 2. A water-cooled heat exchanger for cooling by bringing air flowing through a ventilation path into direct contact with cooling water, wherein the ventilation path has a cooling water on an upper part of a substantially vertical wall surface facing the air path. A water-cooling heat exchanger, comprising: a cooling water supply pipe for flowing out and flowing down the wall surface; and a cooling water falling area enlarging member provided in a cooling water falling area of the wall surface. 3. A water-cooled heat exchanger according to claim 2, wherein said member for enlarging a cooling water flow area is constituted by a plurality of ridges provided on said wall surface. 4. The water-cooled heat exchanger according to claim 3, wherein the ridges are arranged in a zigzag manner. 5. A water-cooled water cooling system according to claim 2, wherein said member for enlarging a cooling water flow area is a fine member such as a punching metal, an expander mesh or a gauze or a member provided with a number of small holes. Heat exchanger. 6. A water-cooled heat exchange system according to claim 2, wherein said cooling water flow down area enlarging member is provided with a plurality of ridges provided so as to extend in a direction perpendicular to said wall surface. vessel.