JP3710725B2 - Washer / dryer and water-cooled heat exchanger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a washing / drying machine and a water-cooled heat exchanger.
[0002]
[Prior art]
As described in Japanese Patent Application Laid-Open No. 11-347282, a washing / drying machine that performs washing, dehydration, and drying includes a water-cooled heat exchanger that performs water-cooling and dehumidification of air sucked from a washing tub by a blower, and a dehumidified air. A heater for heating and blowing into the washing tub is provided. The water-cooled heat exchanger supplies cooling water to a dehumidifying duct that dehumidifies wet air sucked out from a washing tub, and splashes water droplets of the cooling water by the flow of air flowing in the dehumidifying duct to thereby generate air and cooling water. The heat exchange (cooling dehumidification) efficiency due to the contact is improved.
[0003]
[Problems to be solved by the invention]
However, in the washing and drying machine, since there is a heater for heating air downstream of the water-cooled heat exchanger, water droplets generated in the heat exchanger do not fly on the circulating air and fly to the heater position. It is necessary to make it.
[0004]
When a room for dropping water droplets at the outlet of the heat exchanger is provided in order to stop the water droplets generated in the heat exchanger in the heat exchanger, the heat exchanger is enlarged and a water droplet shielding rib is provided. There is a problem that ventilation resistance increases and ventilation volume decreases.
[0005]
One object of the present invention is to increase the contact area between air and cooling water to increase heat exchange (cooling dehumidification) efficiency and prevent water droplets from flying downstream on the air.
[0006]
Another object of the present invention is to further reduce the size of the water-cooled heat exchanger (water-cooled dehumidifier) as described above.
[0007]
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.
[0008]
[Means for Solving the Problems]
The washing / drying machine of the present invention is the washing / drying machine for drying the laundry in the washing tub by circulating the air in the washing tub for washing and dehydrating the laundry to the water-cooled dehumidifier to cool and dehumidify it. The type dehumidifier includes a cooling water supply pipe for flowing cooling water to the wall surface and flowing down the wall surface on top of a substantially vertical wall surface facing the air passage through which air is circulated, and cooling water flow of the wall surface A cooling water flow down area enlarging member provided in the region is provided.
[0009]
Further, the water-cooled heat exchanger of the present invention is a water-cooled heat exchanger that cools air flowing through a ventilation path by directly contacting cooling water with the cooling water, and the ventilation path has a substantially vertical wall surface facing the air path. A cooling water supply pipe that causes the cooling water to flow to the wall surface and flow down along the wall surface, and a cooling water flow area expansion member provided in a cooling water flow area of the wall surface are provided at the top.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
FIG. 1 is a schematic diagram showing the configuration of the washing / drying machine according to the first embodiment of the present invention. FIG. 2: is the longitudinal cross-sectional front view (a) which expands and shows the water-cooled dehumidifier (heat exchanger), and its AA sectional drawing (b).
[0012]
This washing and drying machine hangs the outer tub 3 with the upper end opening 3a openable and closable with the inner lid 4 in an anti-vibration state in the outer frame 1 covered with the outer cover 2 so as to be openable and closable. I support it.
[0013]
In the outer tub 3, a laundry tub 5 into which the laundry is put is rotatably supported, and a stirring blade 6 for stirring the laundry is rotatably supported at the bottom of the laundry tub 5. The washing tub 5 has a large number of small holes 5a for centrifugal dehydration and ventilation on the side wall. An electric drive device 7 attached to the outside of the bottom wall of the outer tub 3 rotates the washing tub 5 and the stirring blade 6. Further, the drainage port 3 b opened in the bottom wall of the outer tub 3 is connected to the drainage hose 9 through the drainage electromagnetic valve 8.
[0014]
The drying device 10 for drying the laundry in the washing tub 5 sucks out the air in the outer tub 3 from a suction port 3c provided on the side wall near the bottom of the outer tub 3, dewaters it with water, then heats it and then blows it. The laundry is dried by generating circulating air 12 by blowing into the washing tub 5 from 11.
[0015]
A water-cooled dehumidifier (heat exchanger) 13 that water-cools and dehumidifies the circulating air 12 is connected to a suction port 3 c formed in the outer tub 3 and is water-cooled dehumidified so as to rise substantially vertically along the back of the side wall of the outer tub 3. A cooling water supply pipe 16 having a cooling water outlet 16a for flowing cooling water 15 to the upper wall surface on the downstream side of the water cooling and dehumidifying duct 14, and a cooling water flow provided in the cooling water flowing region of the wall surface A plurality of ridges 17 as an area expanding member are provided.
[0016]
In FIG. 1, the protrusion 17 is illustrated on the end surface of the water-cooled dehumidifying duct 14, but actually, as shown in FIG. 2, it is positioned on the front and rear wide side walls so as to face the circulation ventilation path. Provide. Since the water-cooled dehumidifying duct 14 is installed in a narrow space between the outer tub 3 and the outer frame 1, the cross-sectional shape of the air passage is configured to be a wide and thin shape with a narrow depth. To do. Specifically, the water-cooled dehumidifying duct 14 has a depth dimension of about 30 mm, a width dimension of about 130 mm, and a length dimension of about 500 mm. Therefore, in order to increase the contact area with the circulating air 12, the cooling water flows out so as to flow down along the front and rear wall surfaces having a wide width (area). 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-cooled dehumidification duct 14 with a height of about 3 mm in order to reduce an increase in ventilation resistance, and supply cooling water The cooling water 15 that has flowed out from the cooling water outlet 16a of the pipe 16 along the wall surface is caused to flow down along the wall surface while being guided in a zigzag manner in the horizontal direction by the protrusions 17.
[0017]
A blower 18 that generates circulating air is connected to an upper end (downstream) portion of the water-cooled dehumidifying duct 14, and a heater 19 that heats the circulating air 12 sent out from the blower 18 and sends it to the blowing nozzle 11 is provided.
[0018]
In the washing and drying machine configured as described above, in the washing process, the laundry is put into the washing tub 5, the water is supplied in a state where the drain electromagnetic valve 8 is closed, and the washing water is stored in the outer tub 3. Rotate to wash the laundry. In the dehydration process, the drain 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.
[0019]
In the drying process, the washing tub 3 and / or the stirring blade 6 are rotated with the drain electromagnetic valve 8 opened, and the air blower 18 is operated to suck out the air in the outer tub 3 from the suction port 3c to perform water-cooled dehumidification. After passing through the duct 14 and water-cooled and dehumidified, it 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.
[0020]
Water-cooled dehumidification of the circulating air 12 deprived of moisture from the laundry in the washing tub 5 and passing through the water-cooled dehumidifying duct 14 flows out from the cooling water outlet 16a of the cooling water supply pipe 16 to the wall surface of the water-cooled dehumidifying duct 14. The circulating water 12 passes through the water-cooled dehumidification duct 14 by causing the cooling water 15 to travel along the wall surface and to be guided in a zigzag state in the horizontal direction by the protrusions 17 and to flow down over a wide range of the wall surface. This is realized by touching the cooling water 15 flowing down along the wall surface of the water-cooled dehumidifying duct 14 over a wide area.
[0021]
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, the circulating air 12 is blown up to the circulating air 12 and flies downstream as water droplets. It will be. Therefore, it is desirable that the cooling water 15 has a flow rate that allows the cooling water 15 to flow without overflowing the corner 17 formed by the inner wall surface of the water-cooled dehumidifying duct 14 and the upper surface of the protrusion 17. The circulating air 12 rising in the water-cooled dehumidifying duct 14 collides with the tip edge of the ridge 17 and turbulents on the downstream (upper surface) side of the ridge 17, so that it is formed by the upper surface and wall surface of the ridge 17. The cooling water 15 that flows along the corners that come in contact with the cooling water 15 can be in good contact with each other to exchange heat and efficiently cool and dehumidify.
[0022]
According to such a water-cooled dehumidifier 13, the water-cooled dehumidifying duct 14 has a wide range of cooling water 15 that flows along the inner wall surface and flows down along the wall surface while being guided in a zigzag state in the horizontal direction by the protrusions 17. Thus, the circulating air 12 can be touched well to exchange heat, and cooling and dehumidification can be performed efficiently. Moreover, since the protrusion 17 provided on the inner wall surface of the water-cooled dehumidifying duct 17 has a low height, it is possible to reduce the increase in ventilation resistance and to prevent the generation of water droplets that fly downstream. You can also. Accordingly, an increase in the size of the water-cooled dehumidifier 13 can be avoided.
[0023]
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 3: is the longitudinal cross-sectional front view (a) which expands and shows the water-cooling type dehumidifier (heat exchanger) in this 2nd Embodiment, and its AA sectional drawing (b). This second embodiment is characterized in that the protrusions provided in multiple stages on the wall surface of the water-cooled dehumidifying duct are arranged in two rows. The description which overlaps about the structure which is common in 1st Embodiment is abbreviate | omitted.
[0024]
In the water-cooled dehumidifier 13 in the second embodiment, the front and rear wall surfaces in the water-cooled dehumidifying duct 14 are divided into two vertically by the partition plate 20, and the protrusions extending in the substantially horizontal direction are respectively divided into the two divided regions. The ridges 17 are arranged in a zigzag state in multiple stages, 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 surfaces of each row is horizontally aligned along the wall surfaces and by the protrusions 17. It is the structure which flows down along this wall surface, guiding in a zigzag state to a direction.
[0025]
In such a water-cooled dehumidifier 13, the cooling water 15 flows down the ridges 17 in two ways, so if the total amount of cooling water 15 to flow down is the same, the cooling water 15 that flows through each of the down-flow channels 15. Therefore, the height of each protrusion 17 can be lowered to greatly reduce the increase in ventilation resistance.
[0026]
Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a longitudinal sectional front view (a) showing an enlarged view of the water-cooled dehumidifier according to the third embodiment, and an AA sectional view (b) thereof. The third embodiment is characterized in that the protrusions provided in multiple stages on the wall surface of the water-cooled dehumidifying duct are arranged in three rows and inclined. The description which overlaps about the structure which is common in embodiment mentioned above is abbreviate | omitted.
[0027]
In the water-cooled dehumidifier 13 in the third embodiment, the protrusions 17 extending at an angle of about 20 degrees with respect to the horizontal direction on the front and rear wall surfaces in the water-cooled dehumidifying duct 14 are zigzag in three rows. The cooling water 15 which is arranged in multiple stages and flows out from the cooling water outlets 16 a, 16 b, 16 c of the cooling water supply pipe 16 along the wall surface of each row is diagonally zigzag along the wall surface and by the protrusion 17. It is the structure which flows down along this wall surface, guiding. Further, the protrusions 17 in each row are arranged so that the inclined side of each row closes into the area opened by the inclination of the adjacent row 17 to increase the arrangement density of the protrusions 17. ing.
[0028]
In such a water-cooled dehumidifier 13, the flow down of the cooling water 15 along the ridges 17 has three systems. Therefore, if the total amount of the cooling water 15 to flow down is the same, the cooling water 15 flowing through the downflow passages 15. In addition, since the inclined ridges 17 easily allow the cooling water 15 to flow down, the height of each ridge 17 is further reduced to greatly reduce the increase in ventilation resistance. be able to. In addition, since the ridge 17 is inclined, the turbulent flow generated downstream of the ridge 17 becomes a vertically long vortex, so that the ventilation resistance is further reduced. Further, since the protrusions 17 in each row are arranged in an intricate manner, the arrangement density is increased, the flow area of the cooling water 15 is increased, and the heat exchange (cooling dehumidification) efficiency can be enhanced.
[0029]
Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 5: is the longitudinal cross-sectional front view (a) which expands and shows the water-cooled dehumidifier in this 4th Embodiment, and its AA sectional drawing (b). The fourth embodiment is characterized in that the cooling water flow area increasing member is formed of punching metal. The description which overlaps about the structure which is common in embodiment mentioned above is abbreviate | omitted.
[0030]
In the water-cooled dehumidifier 13 in the fourth embodiment, a punching metal 21 is installed along a front and rear wall surface in the water-cooled dehumidifying duct 14 with a small gap interposed therebetween, and three cooling water flows of the cooling water supply pipe 16 are provided. The cooling water 15 flows out from the outlets 16a, 16b, and 16c along the wall surface in the water-cooled dehumidifying duct 14, and the cooling water 15 is removed by the capillary force of the minute gap between the wall surface of the water-cooled dehumidifying duct 14 and the punching metal 21. It is the structure made to flow down so that it may diffuse to the whole area. The punching metal 21 has a large number of openings 21a, and the cooling water 15 is exposed to the air passage in the openings 21a and comes into contact with the circulating air 12, thereby cooling and dehumidifying the circulating air 12. Moreover, since the cooling water 15 also cools the punching metal 21, the circulating air 12 which contacts the punching metal 21 is cooled and dehumidified.
[0031]
The circulating air 12 flowing in the water-cooled dehumidifying duct 14 turbulently flows due to a step due to the opening 21a of the punching metal 21. By forming the punching metal 21 with a thin steel material, an increase in ventilation resistance due to this turbulent flow is extremely reduced. be able to.
[0032]
Note that the cooling water flow area increasing member in the fourth embodiment can be expected to have the same effect even when an expander mesh or gauze is used instead of the punching metal 21. The punching metal 21 is preferably a metal having excellent thermal conductivity so as not to have thermal resistance, but can be changed to a material such as a resin when there are problems such as cost and rust.
[0033]
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 the protrusions provided on the inner wall of the water-cooled dehumidifying duct are formed in a spiral shape. The description which overlaps about the structure which is common in embodiment mentioned above is abbreviate | omitted.
[0034]
The water-cooled dehumidifier 13 in this embodiment has a configuration in which spiral ridges 17 that are continuous on four wall surfaces in the water-cooled dehumidifying duct 14 are provided, and the cooling water flows down spirally along the wall surfaces. .
[0035]
In the fifth embodiment, the four wall surfaces in the water-cooled dehumidifying duct 14 can be used as the cooling water flow lower surface, so that the contact area between the cooling water and the circulating air can be increased. The protrusion 17 can also be configured in a plurality of spiral shapes.
[0036]
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 in the sixth embodiment. The sixth embodiment is characterized in that the inside of the water-cooled dehumidifying duct is partitioned to form two air paths, and a spiral protrusion is provided on the inner wall surface of each air path. The description which overlaps about the structure which is common in embodiment mentioned above is abbreviate | omitted.
[0037]
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 and spiral ridges 17 that are continuous with four wall surfaces in each air passage. The cooling water is caused to flow down spirally along the wall surface.
[0038]
In the sixth embodiment, the interior of the water-cooled dehumidifying duct 14 is partitioned to form two air paths, and the four wall surfaces of each air path can be used as the cooling water flow lower surface. The contact area can be increased. The protrusion 17 can also be configured in a plurality of spiral shapes.
[0039]
In addition, the spiral protrusion 17 in the fifth and sixth embodiments described above can be changed to a spiral hose for water passage inserted along the wall surface of the water-cooled dehumidifying duct 14.
[0040]
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 lower end of the wall surface through the wall surface of the water-cooled dehumidifying duct is blown up by the circulating air flowing into the water-cooled dehumidifying duct so that water droplets flying downstream are not generated. The water cooling dehumidification duct is characterized in that a drainage guide convex portion is provided at the lower end portion. The description which overlaps about the structure which is common in embodiment mentioned above is abbreviate | omitted.
[0041]
In this embodiment, the water-cooled dehumidifier 13 connects the lower end of the water-cooled dehumidifying duct 14 to a suction port 3 c provided in the outer tub 3. Circulating air 12 flowing in the horizontal direction from the suction port 3c to the lower end of the water-cooled dehumidifying duct 14 changes its direction so as to rise substantially vertically along the water-cooled dehumidifying duct 14 at the lower end of the water-cooled dehumidifying duct 14 in a substantially vertical state. . When the cooling water 15 flows down to the lower end edge of the wall surface inside the water-cooled dehumidifying duct 14 facing this direction change portion, the cooling water 15 falls from the lower end 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 part 23 guides the cooling water 15 flowing down along the ridges 17 to the lower part of the wall surface inside the water-cooled dehumidifying duct 14 to the shaded part of the ventilation formed by the partition plates 24 at both ends to circulate at a high flow rate. It is configured not to sag in a form exposed to air 12.
[0042]
A drain port 24a is formed in the partition plate 24, and the cooling water 15 accumulated in the shadow is allowed to flow into the outer tub 3 along the bottom wall surface of the suction port 3c.
[0043]
By configuring the lower end portion of the water-cooled dehumidifying duct 14 as in this embodiment, it is possible to prevent generation of water droplets that fly to the downstream and become an obstacle.
[0044]
Next, an eighth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a longitudinal side view of a water-cooled dehumidifier in the eighth embodiment. The eighth embodiment is characterized in that a heat exchange plate is installed along the air path in the water-cooled dehumidification duct, and a protrusion is provided on the surface of the heat exchange plate. The description which overlaps about the structure which is common in embodiment mentioned above is abbreviate | omitted.
[0045]
In the water-cooled dehumidifier 13 in this embodiment, a metal heat exchange plate 25 is installed in a vertical state at a substantially intermediate position in the front-rear direction in the water-cooled dehumidifying duct 14, and the water-cooled dehumidifying duct 14 is divided into two in the front-rear direction. It is divided vertically. This heat exchange plate 25 is provided with a protrusion 17 similar to that of the above-described embodiment on the rear wall (right side in the figure), and the lower end of the heat exchange plate 25 is a suction port provided on the side wall of the outer tub 3. The guide portion 25a is formed by bending toward 3c. No protrusion 17 is provided in the guide portion 25a. And it is comprised so that the cooling water 15 may be poured on the said rear wall surface from the cooling water outflow port 16a of the cooling water supply pipe | tube 16. FIG.
[0046]
Such a water-cooled dehumidifier 13 smoothly circulates the circulating air 12 flowing from the suction port 3 c into the front and rear flow paths by the lower end portion 25 a of the heat exchange plate 25. Then, the circulating air 12 divided into the flow path on the rear side is similar to the circulating air 12 in the above-described embodiment, and the cooling water 15 flowing down along the ridges 17 and the heat exchange cooled by the cooling water 15. The plate 25 is touched to cool and dehumidify. In addition, the circulating air 12 that has been divided into the flow path on the front side is brought into contact with the heat exchange plate 25 that has been cooled by the cooling water 15 to be cooled and dehumidified.
[0047]
The cooling water 15 flowing down the wall on the rear side of the heat exchange plate 25 is configured to flow down both ends of the space on the rear side of the guide portion 25a, thereby preventing the generation of water droplets flying to the downstream side. To do.
[0048]
Next, a ninth embodiment of the present invention will be described with reference to FIG. FIG. 10: is the longitudinal cross-sectional front view (a) which expands and shows the water-cooling type dehumidifier in this 9th Embodiment, and its AA sectional drawing. In the ninth embodiment, a heat exchange plate is installed in the water-cooled dehumidification duct along the air path, and a plurality of protrusions extending in the vertical direction on the surface of the heat exchange plate are arranged in the horizontal direction. There are features. The description which overlaps about the structure which is common in embodiment mentioned above is abbreviate | omitted.
[0049]
In the water-cooled dehumidifier 13 in this embodiment, a plurality of ridges 17 extending in a substantially vertical direction are arranged on the surface of the heat exchange plate 25 so as to be arranged in the horizontal direction at intervals, and cooled between the ridges 17. The cooling water 15 is caused to flow down from a plurality of cooling water outlets 16 a of the water supply pipe 16.
[0050]
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 protrusions 17, thereby improving the heat exchange performance.
[0051]
Next, a tenth embodiment of the present invention will be described with reference to FIG. FIG. 11: is the longitudinal cross-sectional front view (a) which expands and shows the water-cooling type dehumidifier in this 10th Embodiment, and its AA sectional drawing. The tenth embodiment is characterized in that a heat exchange plate is installed in the water-cooled dehumidification duct along the air path, and cooling water is poured into the surface of the heat exchange plate in the form of a shower. The description which overlaps about the structure which is common in embodiment mentioned above is abbreviate | omitted.
[0052]
The tenth water-cooled dehumidifier 13 in the embodiment of the plurality of ridges 20 extending in a direction substantially perpendicular to the surface of the heat exchange plate 25, placed side by side laterally spaced, each ridge 20 During this period, the cooling water 15 flows out from one cooling water outlet 16a of the cooling water supply pipe 16 in a shower shape (so as to spread in a fan shape) and flows between the protrusions 20 to flow down.
[0053]
Also in this embodiment, the contact area between the cooling water 15 and the circulating air 12 can be increased by increasing the number of the ridges 20 to improve the heat exchange performance.
[0054]
The ridges 17 and 20 in each of the above-described embodiments can be changed to concave ridges constituting the same water channel. Further, the protrusions 17 and 20 or the concave stripes may be provided on both surfaces of the heat exchange plate 25 to further increase the contact area between the cooling water 15 and the circulating air 12. The heat exchange plate 25 and the protrusions 17 and 20 are preferably made of a metal having excellent thermal conductivity so as not to have thermal resistance. However, when there is a problem such as cost or rust, a resin or the like is used. It can be changed to a material.
[0055]
Such a water-cooled dehumidifier (heat exchanger) can be used for clothes dryers, dishwashers and the like.
[0056]
【The invention's effect】
The present invention includes a metal heat exchange plate installed so as to form a substantially vertical wall surface in an air passage through which air is circulated, and cooling water is poured onto the wall surface above the wall surface of the heat exchange plate. A cooling water supply pipe that flows down along the wall surface and a cooling water flow area expanding member provided in a cooling water flow area of the wall surface are provided , and the cooling water supply pipe is connected to the wall surface of the heat exchange plate and the cooling water flow By supplying cooling water to the wall surface with a flow rate such that the cooling water flowing in the corners formed by the area expansion member does not overflow along the cooling water flow area expansion member. The contact area between the air flowing in the road and the cooling water is widened and the air is also cooled through the metal heat exchange plate, so the heat exchange (cooling dehumidification) efficiency is improved and the water droplets fly on the downstream side on the air. Can be prevented.
[0057]
Moreover, a water-cooled heat exchanger (water-cooled dehumidifier) can be reduced in size by increasing the cooling water flow area.
[0058]
Moreover, the member discharged to a ventilation path can be made small, and the ventilation resistance of a water cooling type heat exchanger (water cooling dehumidifier) can be made small.
[Brief description of 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 front view (a) showing an enlarged view of the water-cooled dehumidifier (heat exchanger) of the washing and drying machine shown in FIG.
FIG. 3 is a longitudinal sectional front view (a) showing an enlarged view of a water-cooled dehumidifier according to a second embodiment of the present invention, and an AA sectional view (b) thereof.
FIG. 4 is a longitudinal sectional front view (a) showing an enlarged view of a water-cooled dehumidifier according to a third embodiment of the present invention, and an AA sectional view (b) thereof.
FIG. 5 is a longitudinal sectional front view (a) showing an enlarged view of a water-cooled dehumidifier according to a fourth embodiment of the present invention, and an AA sectional view (b) thereof.
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 side view of a water-cooled dehumidifier according to an eighth embodiment of the present invention.
FIG. 10 is a longitudinal sectional front view (a) showing an enlarged view of a water-cooled dehumidifier according to a ninth embodiment of the present invention and an AA sectional view (b) thereof.
FIG. 11 is a longitudinal sectional front view (a) showing an enlarged view of a water-cooled dehumidifier according to a tenth embodiment of the present invention, and an AA sectional view (b) thereof.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 ... Outer tub, 5 ... Washing tub, 6 ... Stirring blade, 13 ... Water-cooled dehumidifier (heat exchanger), 14 ... Water-cooled dehumidification duct, 15 ... Cooling water, 16 ... Cooling water supply pipe, 17 ... Projection.

Claims (5)

In a washing and drying machine for drying laundry in a washing tub by circulating air in a washing tub for washing and dehydrating the laundry to a water-cooled dehumidifier and cooling and dehumidifying it,
The water-cooled dehumidifier includes a metal heat exchange plate installed so as to form a substantially vertical wall surface in an air passage through which air circulates, and an upper portion of the wall surface of the heat exchange plate along the wall surface. A cooling water supply pipe for flowing out cooling water and flowing down along the wall surface, and provided on the wall surface so as to guide the cooling water flowing down along the wall surface to the cooling water flowing region of the wall surface in a zigzag state A cooling water flow area expansion member, and the cooling water supply pipe overflows along the cooling water flow area expansion member in a corner formed by a wall surface of the heat exchange plate and an upper surface of the cooling water flow area expansion member. A washing / drying machine characterized in that cooling water having a flow rate that does not flow out is supplied to the wall surface . In a water-cooled heat exchanger that cools air flowing through a ventilation path by directly contacting cooling water,
The ventilation path includes a metal heat exchange plate installed so as to form a substantially vertical wall surface in the air path, and cooling water is poured into the wall surface above the wall surface of the heat exchange plate to A cooling water supply pipe that is caused to flow down, and a cooling water flow area expanding member provided on the wall surface so as to guide the cooling water flowing down along the wall surface in a zigzag state in the cooling water flow region of the wall surface , The cooling water supply pipe is cooled at a flow rate such that the cooling water supply pipe flows in the corner formed by the wall surface of the heat exchange plate and the upper surface of the cooling water flow area expansion member without overflowing the cooling water flow area expansion member. A water- cooled heat exchanger characterized in that water is supplied to the wall surface . In a water-cooled heat exchanger that cools air flowing through a ventilation path by directly contacting cooling water,
The ventilation path includes a metal heat exchange plate installed so as to form a substantially vertical wall surface in the air path, and cooling water is poured into the wall surface above the wall surface of the heat exchange plate to A cooling water supply pipe that is caused to flow down and extend vertically to the wall surface so as to guide the cooling water flowing down along the wall surface in a cooling water flow down region of the wall surface of the heat exchange plate. A cooling water flow area expansion member in which a plurality of provided protrusions are arranged in a horizontal direction is provided , and the cooling water supply pipe flows down the corner formed by the wall surface of the heat exchange plate and the cooling water flow area expansion member. A water- cooled heat exchanger characterized in that the cooling water is supplied to the wall surface at such a flow rate that the cooling water flows without overflowing the cooling water flow area expansion member .   The washing / drying machine according to claim 1, wherein the water-cooled dehumidifier is configured such that the air flows from the bottom to the top in the air passage in which the heat exchange plate is installed.   4. The water-cooled heat exchanger according to claim 2, wherein the air passage is configured such that the air flows from below to above in the air passage in which the heat exchange plate is installed.

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