JP2012179268A - Drum washing/drying machine - Google Patents

Abstract

An object of the present invention is to reduce the size of a heat exchange path by collecting dust, lint, and the like from laundry.
A heat exchanging path 13 for exchanging heat of moisture containing moisture in the laundry is inclined at the upper part to the product rear side, and cooling water from a water supply valve 32 is supplied to the rear side inclined surface 13a. The inclined surface 13a on the back side constitutes a vertical surface 13b whose lower portion is bent in a substantially vertical direction at a bending point 13e between the hot air discharge port 28 of the water receiving tank 2 so that the cooling water from the water supply section 34 is It flows down along the back inclined portion 13a and scatters as fine water droplets by the circulating air (air flow A) in the direction opposite to the cooling water flow at the bending point 13e. Passing through the water droplets and effectively exchanging heat, and since dust and lint from the laundry contained in the circulation wind are also discharged together with the cooling water, it is difficult to accumulate in the heat exchange path 13, Compact because the heat exchange path 13 can be downsized. Reduction is possible.
[Selection] Figure 2

Description

  The present invention relates to a drum-type washing and drying machine that sequentially controls each process such as washing, rinsing, dehydration, and drying with a rotating drum having a rotation center axis in a substantially horizontal direction or an oblique direction.

  Conventionally, this type of drum-type washing and drying machine is dried by a water receiving tub containing a rotating drum into which clothes are put, a heat exchange path for cooling and dehumidifying high-humidity high-temperature air, and a ventilation path provided with a heater and a blower fan. A circulation dehumidification path is configured, and the clothes in the drum are dried by the action of heating air blowing and heat exchange dehumidification on the air containing water vapor in the clothes (see, for example, Patent Document 1).

  FIG. 5 shows a longitudinal sectional view of a conventional washing and drying machine described in Patent Document 1. As shown in FIG. As shown in FIG. 5, a water receiving tank 2 is supported in a main body 1 by a plurality of suspensions (not shown) and dampers (not shown), and a lid 3 provided on a part of the main body 1 is opened and closed. The laundry is taken in and out, and the rotating drum 4 and the stirring blade 5 are arranged in the water receiving tub 2 so as to be rotatable. The rotating drum 4 and the stirring blade 5 are driven by a motor 6, and a large number of through holes (not shown) are provided in the rotating drum 4. A washing water supply valve (not shown) supplies washing water into the water receiving tub 2, and a cooling water supply valve (not shown) supplies cooling water and is provided in the main body 1. . Further, the water receiving tank 2 is provided with a drain port 7 and a drain valve 8.

  The blower fan 9 blows air into the water receiving tank 2 through the front air blowing path 10, and a heater 11 is disposed between the blower fan 9 and the front air blowing path 10, so that the inside of the water receiving tank 2 and the blower fan 9 are arranged. Between the two, a heat exchange path 13 having a heat exchanger plate surface 12 provided therein is formed.

  Further, the heat exchanger plate surface 12 is formed in parallel with the air passage in the heat exchange path 13, and a guide member having a protruding shape for flowing cooling water down in a zigzag manner on the heat exchanger plate surface 12. 14, the heat exchange path 13 is disposed in a state inclined with respect to the product installation surface 15, and is directly connected to a cooling water supply valve (not shown) and opened to the heat exchange path 13 A series of dry circulation dehumidification paths are constituted by a water hose (not shown).

  In the above configuration, when the laundry is put into the rotating drum 4 and the washing process is started, a washing water supply valve (not shown) is opened and water is supplied into the water receiving tank 2 to a predetermined water level. Next, the rotating drum 4 rotates at a low speed, and the thrown-in laundry is repeatedly stirred and washed by the stirring blade 5.

  When the washing process is finished, the drain valve 8 is opened to drain the washing water. When drainage is finished, the rotating drum 4 is rotated at high speed to perform dehydration. When the dehydration process is completed, the process proceeds to the drying process.

  In the drying process, as in the washing process, the rotating drum 4 is rotated at a low speed, and the hot air heated by the blower fan 9 and the heater 11 is blown to the clothing in the rotating drum 4 while stirring the laundry in the rotating drum 4. Spraying from the mouth 10, the moisture contained in the clothing is heated and evaporated.

  And the humid air containing a vapor | steam is sent in the heat exchange path | route 13, On the other hand, the cooling water supplied to the heat exchange path | route 13 via the cooling water hose from the water supply valve for cooling water is on the heat exchanger board surface 12. By flowing down on the guide member 14 in a zigzag manner, heat exchange is performed by direct contact with moist air, thereby cooling and dehumidifying.

  The cooling water and the water subjected to cooling and dehumidification are discharged from the drainage path 7 by opening the drain valve 8 during the drying process. The dehumidified air is heated again by the heater 11 and sent to the rotary drum 4 to dry the clothes. A drying process is formed by repeating these series of cycles.

JP 2008-054948 A

  However, in such a conventional configuration, dust and lint from the laundry in the rotary drum 4 are carried along with the warm air into the heat exchange path 13, and the end face of the heat exchange plate surface 12 and the guide member 14 are zigzag. There was a problem that the drying performance could not be sufficiently ensured because it was caught on the projecting portion and gradually accumulated and the air passage narrowed. In addition, the accumulation of dust and lint has caused off-flavors and sanitary problems. Furthermore, since the heat exchanger plate surface 12 and the guide member 14 are separately provided in parallel in the heat exchange path 13, the air path pressure loss increases when the heat exchange path 13 is reduced, so that it is very difficult to make the product compact. there were.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems, and is a drum-type washing and drying machine equipped with a compact heat exchanger that has high dehumidification efficiency and is difficult to collect dust and lint from the laundry in the heat exchange path. Is to provide.

  In order to solve the above-described conventional problems, a drum-type washing and drying machine according to the present invention includes a rotating drum having a plurality of through holes and having a rotating shaft in a horizontal direction or a downward inclined direction from the front side toward the back side. A water receiving tank that is supported in the main body and encloses the rotating drum, a blowing means for sending wind into the rotating drum, a heating means for heating the air blown by the blowing means, and heated by the heating means. A hot air blowing port for guiding the air to the water receiving tank, a heat exchange path for dehumidifying the hot and humid air in the water receiving tank via the hot air discharge port, and cooling water into the heat exchange path A water supply section for supplying water, and the heat exchange path has a substantially upper portion inclined to the rear side of the product with respect to a substantially horizontal installation surface of the main body, and a substantially lower portion is set to a substantially vertical surface. It is configured to supply cooling water. .

  Thus, the cooling water supplied to the heat exchange path flows down the inclined surface on the back side from the water supply portion to the substantially vertical surface bent in a substantially vertical direction of the inclined surface on the back side, and then the substantially vertical surface. In this case, the circulating air in the direction opposite to the flow of the cooling water separates from the inclined surface on the back side and scatters as fine water droplets. On the other hand, the high-temperature air containing steam passes through the splashed water droplets while flowing from the water receiving tank to the air blowing means, and comes into direct contact with the cooling water flowing down the inclined surface on the back side. Dust and yarn waste from the contained laundry are less likely to accumulate on the heat exchange path, and the heat exchange path can be downsized.

  The drum type washing and drying machine of the present invention prevents dust and yarn waste from the laundry contained in the circulation wind from accumulating on the heat exchange path due to repeated drying processes as much as possible, and prevents a decrease in drying efficiency. I can do it.

The longitudinal cross-sectional view of the drum type washing-drying machine in Embodiment 1 of this invention Longitudinal sectional view at the site of the drying function of the drum type washing and drying machine The longitudinal cross-sectional view of the drum type washing-drying machine in Embodiment 2 of this invention The longitudinal cross-sectional view of the drum type washing-drying machine in Embodiment 3 of this invention Longitudinal section of a conventional washer / dryer

  A first aspect of the present invention is a rotating drum having a plurality of through holes and having a rotation shaft in a horizontal direction or a downward inclined direction from the front side to the back side, and a water receiver that is supported in the main body and includes the rotating drum. A tank, a blowing means for sending wind into the rotating drum, a heating means for heating the wind blown by the blowing means, and a hot air blowing port for guiding the air heated by the heating means to the water receiving tank A heat exchange path for dehumidifying hot and humid air in the water receiving tank via a hot air outlet, and a water supply part for supplying cooling water into the heat exchange path, the heat exchange path comprising: The heat exchange is achieved by inclining the substantially upper part to the product rear side with respect to the substantially horizontal installation surface of the main body and the substantially lower part as a substantially vertical surface, and supplying cooling water to the back side inclined surface of the heat exchange path. The cooling water supplied to the route is from the water supply section. From the back side inclined surface by the circulating air flowing down the back side inclined surface until the bending point bent in the substantially vertical direction of the back side inclined surface, and then flowing in the direction opposite to the cooling water flow in the substantially vertical surface. Separates and scatters as fine water droplets.

  Therefore, the high-temperature air containing steam is in direct contact with the cooling water flowing through the splashed water and flowing down the back side inclined surface while flowing from the water receiving tank to the heating means, It flows out together with the cooling water, has a high dehumidifying efficiency and can secure a sufficient drying performance, and dust and lint from the laundry contained in the circulating air are less likely to accumulate in the heat exchange path. In addition, since the cooling water is allowed to flow directly on the back-side inclined surface in the heat exchange path, the heat exchange path can be reduced and the product can be made compact.

  According to a second aspect of the invention, in particular, in the first aspect of the invention, the heat exchange path is located at a position between the water supply unit and the hot air outlet and on the inclined surface on the front side of the heat exchange path. By providing a smooth projecting shape part toward the inside of the heat exchange path so that it becomes smaller, the cooling water supplied to the heat exchange path flows down the inclined surface on the back side from the water supply part, and then the cross-sectional area is partially Since the wind speed of the warm air is locally increased in the smooth projecting shape part that has become smaller, the cooling water separates from the inclined surface on the back side due to the fast circulating air in the direction opposite to the cooling water, and it becomes fine water droplets and scatters. This increases the degree to which high-temperature air containing steam is in direct contact with the cooling water, ensuring high dehumidification efficiency and ensuring sufficient drying performance, and making the product more compact by reducing the heat exchange path. Can be realized.

  In a third aspect of the invention, particularly in the second aspect of the invention, the heat exchange path is formed by bringing the smooth projecting shape portion and the bending point formed by the boundary portion between the back side inclined surface and the substantially vertical surface close to each other. By comprising, the effect that the cooling water dripped becomes a fine water droplet and it spreads further increases, and the heat exchange effect can be improved more.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a drum-type washing / drying machine according to the first embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a portion of a drying function of the drum-type washing / drying machine.

  As shown in FIG. 1, the rotating drum 4 is formed in a bottomed cylindrical shape, provided with a large number of through holes 16 on the entire outer periphery thereof, and is rotatably disposed in the water receiving tank 2. A rotary shaft 17 is provided in the tilt direction at the rotation center of the rotary drum 4, and the axis center direction of the rotary drum 4 is tilted downward from the front side toward the back side. A pulley 18 attached to the rotating shaft 17 is connected to a motor 6 fixed to the outer bottom portion of the water receiving tank 2 through a belt 19 to drive the rotating drum 4 to rotate in the forward and reverse directions. Several protrusion plates 20 for stirring clothes are provided on the inner wall surface of the rotating drum 4.

  An opening provided in the upward inclined surface on the front side of the water receiving tub 2 is covered with a lid 3 so that it can be opened and closed. By opening and closing the lid 3, the laundry can be taken in and out of the rotary drum 4 through the clothing entrance 21. ing. Since the lid 3 is provided on the upward inclined surface, the laundry can be carried out without bending the waist.

  The water receiving tank 2 is supported by a spring body 22 above the main body 1 and a damper 23 below the body 1 so as to be swingable. Further, one end of the drainage path 7 is connected to the lower part of the water receiving tank 2, and the other end of the drainage path 7 is connected to the drain valve 8 so as to drain the washing water in the water receiving tank 2. A water supply valve 24 disposed above the inside of the main body 1 supplies water into the water receiving tank 2 through a water supply path 25. The water level detecting means 26 detects the water level of the washing water supplied into the water receiving tank 2.

  In the present embodiment, the rotation shaft 17 is provided in the tilt direction at the rotation center of the rotary drum 4, and the axial center direction of the rotary drum 4 is inclined downward from the front side toward the back side. However, the rotary shaft 17 may be provided in the horizontal direction at the rotation center of the rotary drum 4 and the axial center direction of the rotary drum 4 may be arranged in the horizontal direction.

  The configuration of the drying function will be described with reference to the cross-sectional view of the portion of the drying function in FIG.

  As shown in FIG. 2, the drying function includes a heat exchange path 13 connected to the bottom of the water receiving tank 2 and a fan case (air blowing path) connected to the heat exchanging path 13 and the upper part of the water receiving tank 2 while being fixed to the upper part of the main body. 27 and a circulation path.

  Inside the fan case 27, a heater (heating means) 11, a blower fan (blower means) 9, and the heater 11 and the blower fan 9 are housed inside, and an intake end 27 a that is the intake side of the circulation path is The exhaust end 27 b on the discharge side is connected to the hot air blowing port 29 of the water receiving tank 2 via the second bellows hose 31. .

  The heat exchange path 13 connects the intake side to a hot air outlet 28 that discharges air at the bottom of the back surface of the water receiving tank 2, and connects the discharge side to the fan case 27. The shape of the heat exchange path 13 is such that the upper side inclined surface 13a is inclined upward (right side in FIG. 2) with respect to the substantially horizontal installation surface 15 where the drum type washing / drying machine is installed upward. In the lower part connected to the back side inclined surface 13a, the vertical surface 13b is formed by changing the angle in the substantially vertical direction at the bending point 13e with the warm air outlet 28. The cross-sectional shape of the heat exchange path 13 on the water receiving tank 2 side (left side in FIG. 2) is formed with a front side inclined surface 13c that is inclined in a substantially parallel state with the back side inclined surface 13a.

  A water supply valve (cooling water supply means) 32 disposed at the upper part of the main body supplies cooling water from the water supply base 34 to the back side inclined surface 13a of the heat exchange path 13 via the cooling water hose 33. The valve 32, the cooling water hose 33, and the water supply base portion 34 constitute a cooling water supply means, and the cooling water from the cooling water supply valve 32 flows from the water supply base portion 34 to the back side inclined portion of the heat exchange path 13. It falls on 13a and flows downward along the back side inclined surface 13a.

  A large number of back surface through holes 36 are provided on the back surface of the rotating drum 4 at positions corresponding to the hot air discharge ports 28 at the bottom of the back surface of the water receiving tank 2. The air that has passed through the through holes 16 is discharged from the hot air discharge port 28 to the heat exchange path 13.

  In the drum type washing and drying machine having the above-described configuration, the washing process, the rinsing process, the dehydrating process, and the drying process are executed by the control operation of the control device 35.

  The operation and action of the drying function configured as described above will be described below. In addition, since the operation | movement from a washing process to a dehydration process is the same as a conventional operation | movement, description is abbreviate | omitted.

  In FIG. 2, in the drying process, as shown by the solid arrows in the air flow (A), the air blown by the rotation of the blower fan 9 is heated to a predetermined temperature by the heater 11, and the second bellows hose 31 and the front surface are heated. The air is blown from the hot air blowing port 29 to the rotating drum 4 included in the water receiving tank 2 through the blowing path 10. The heated hot air takes moisture from the wet laundry in the rotating drum 4 in a state of being stirred, and becomes hot hot air containing steam.

  Thereafter, the wet warm air passes through the through hole 16 and the back surface through hole 32 from the inside of the rotating drum 4, is discharged to the water receiving tank 2, and is further blown from the warm air discharge port 28 to the heat exchange path 13.

  The wet warm air blown into the heat exchange path 13 rises along the vertical surface 13b of the heat exchange path 13, but at this time, the cooling water supply valve 32 is in the ON state, and the cooling water is supplied to the water. It falls from the base part 34 onto the back side inclined part 13a of the heat exchange path 13, and flows downward along the back side inclined surface 13a as indicated by the white arrow in the flow of cooling water (B).

  The wet warm air flowing upward along the vertical surface 13b heats the cooling water that has fallen along the back side inclined portion 13a near the bending point 13e between the back side inclined portion 13a and the vertical surface 13b. It winds up inside the exchange path 13 and scatters in a fine water droplet state. Therefore, since the moist warm air passes through the water-cooled cooling water, the heat exchange operation is efficiently performed between the cooling water and the moist hot air, and the moist hot air is dehumidified. (First dehumidifying step).

  Further, the wet warm air is sent upward along the back-side inclined surface 13a, and efficiently exchanges heat with the cooling water flowing on the back-side inclined surface 13a. It will be dehumidified. (Second dehumidification step).

  The cooling water subjected to the heat exchange action is discharged from the drainage path 7 communicating with the water receiving tank 2 together with dust, lint, etc. contained in the wet warm air, and is discharged outside the apparatus through the drainage valve 8.

  As described above, the humid hot air that has passed through the two dehumidifying steps, the first dehumidifying step and the second dehumidifying step, becomes high-temperature air that has been efficiently cooled and dehumidified, and is sucked into the fan case 27 via the first bellows hose 30. The air is sent from the end 27 a into the fan case 27 and reaches the blower fan 9.

  By the air circulation as described above, the laundry is gradually dried, and the drying process is finished after a predetermined time has elapsed or when the laundry reaches a predetermined dryness.

  In this way, the wet warm air is efficiently dehumidified in the drying process, so that the time of the drying process can be shortened and the unevenness in drying after drying can be reduced.

  In addition, since a part of the heat exchange path 13 is used for a portion through which the cooling water flows and no parts such as a heat exchange plate are separately used in the heat exchanger path 13, dust contained in the wet hot air Further, it is hygienic because yarn waste is caught and hardly accumulated, and the product can be made compact by reducing the heat exchange path.

(Embodiment 2)
FIG. 3 is a longitudinal sectional view of a drum type washing / drying machine according to a second embodiment of the present invention.

  As shown in FIG. 3, the cross-sectional shape of the heat exchange path 13 is formed by a front side inclined surface 13c that is inclined in a substantially parallel state with the rear side inclined surface 13a, and the warm air is below the position where the water supply base 34 is formed. A projecting portion 13d that is smooth toward the inside of the heat exchange path 13 so that the cross-sectional area of the path is partially reduced in the direction perpendicular to the air flow direction so as to narrow the pipe of the heat exchange path 13 at an intermediate position with the discharge port. Is provided. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  The operation in the above configuration will be described. The basic operation in the drying process is the same as that in the first embodiment, and a description thereof will be omitted.

  The wet warm air sent into the heat exchange path 13 rises along the back side inclined surface 13a of the heat exchange path 13, but the wind speed of the moist warm air is locally at the site of the smooth projecting portion 13d. Therefore, the cooling water flowing on the back-side inclined surface 13a is strongly wound up by the wind pressure, and splashes in more fine water droplets and at the same time the moist warm air passes, so the cooling water and the moist temperature The heat exchange effect is efficiently performed between the winds.

(Embodiment 3)
FIG. 4 is a longitudinal sectional view of a drum type washer / dryer according to a third embodiment of the present invention.

  In FIG. 4, the heat exchange path 13 is configured such that the protrusions 13d that are smooth toward the inside of the heat exchange path and the bending points 13e of the back-side inclined surface 13a and the vertical surface 13b are close to each other.

  Therefore, the wet warm air sent into the heat exchange path 13 is dripped from the vertical surface 13b side having a larger pipe area at the bent part 13e where the pipe area is narrowed, and dripped. The cooling water that comes from the hot air from the bottom increases the effect of scattering into fine water droplets, and the heat exchange effect with the moist hot air can be further enhanced.

  As described above, the drum type washing and drying machine according to the present invention efficiently performs a heat exchange operation in a heat exchange path that is difficult to catch dust and lint and accumulates. Since it becomes possible to reduce unevenness, it is useful as a drum-type washing and drying machine that sequentially controls each process such as washing, rinsing, dewatering and drying in a rotating drum having a rotation center axis in a substantially horizontal direction or an oblique direction. is there.

DESCRIPTION OF SYMBOLS 1 Main body 2 Water receiving tank 3 Cover body 4 Rotating drum 9 Blower fan (blower means)
11 Heater (heating means)
13 Heat Exchange Path 13a Back Side Inclined Surface 13b Vertical Surface 13d Projecting Shaped Part 13e Bending Point 15 Horizontal Installation Surface 16 Through Hole 17 Rotating Shaft 32 Cooling Water Supply Valve (Cooling Water Supply Means)
34 Water supply cap (water supply)

Claims (3)

A rotating drum having a plurality of through holes and having a rotating shaft in a horizontal direction or a downward inclined direction from the front side to the back side, a water receiving tank that is supported in a main body and contains the rotating drum, and the rotating drum A blowing means for sending wind into the inside, a heating means for heating the wind blown by the blowing means, a hot air blowing port for guiding the air heated by the heating means to the water receiving tank, and the inside of the water receiving tank A heat exchange path for dehumidifying the hot and humid air via the hot air outlet, and a water supply part for supplying cooling water into the heat exchange path, wherein the heat exchange path is a substantially horizontal installation surface of the main body. On the other hand, the drum-type washing and drying machine has a configuration in which a substantially upper portion is inclined toward the back side of the product and a substantially lower portion is set as a substantially vertical surface, and cooling water is supplied to the inclined surface on the back side of the heat exchange path. The heat exchanging path is smooth toward the inside of the heat exchanging path so that the cross-sectional area of the heat exchanging path is partially reduced at the position between the water supply unit and the hot air outlet and on the inclined surface on the front side of the heat exchanging path. The drum-type washing / drying machine according to claim 1, further comprising a protruding portion. The drum-type washing and drying machine according to claim 2, wherein the heat exchange path is configured such that a smooth projecting shape portion and a bending point formed by a boundary portion between a back-side inclined surface and a substantially vertical surface are close to each other.

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