JP2008264233A - Washing/drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a bubble invasion of the inner side of a circulation air duct to be more securely prevented and prevent a decrease in blowing efficiency of air flowing through the duct as less as possible. <P>SOLUTION: The washing/drying machine is provided with: a front duct 13 communicating with first and second front air holes 14 and 15 and disposed in the front of a water tank 6 housing a drum; and a rear duct communicating with a rear air hole 23 and disposed in the rear of the tank 6; wherein air inside the tank 6 is circulated via the circulation air duct provided with the front duct 13 and the rear duct. The rear duct is provided with a bubble sensor 33. The front duct 13 is provided with first and second bubble invasion preventing ribs 16 and 17 corresponding to the air holes 14 and 15. The upper end 17a of the second rib 17 in a downward side in a rotating direction (shown as the arrow E) at spin-drying of the drum is placed lower than the upper end 15a of the second air hole 15. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drum-type laundry dryer that performs washing, dehydration and drying of laundry contained in a drum.

  In a conventional drum-type washing and drying machine, a circulation air passage that communicates with the inside of the water tank via a vent is provided outside the water tank that accommodates the drum, and a drying heater and a fan are provided in the circulation air passage. A fan or the like is provided, and drying air heated by the heater is circulated through the circulation air passage and the water tank to dry the laundry in the drum. In the thing of such a structure, the said heater and ventilation fan are arrange | positioned above the water tank, and the vent which connects a water tank and a circulation ventilation path is also located in the upper part of a water tank. For this reason, even if bubbles or water droplets generated in the water tank during washing or dewatering (especially during intermediate dewatering) enter the circulation air passage from the vent, they are immediately returned to the water tank from the vent. It was like that.

On the other hand, in recent years, a heat pump type washing dryer using a heat pump as a drying means has been developed (see, for example, Patent Documents 1 and 2). In the case of this type of heat pump type washing and drying machine, since the weight of the heat pump unit such as an evaporator or a condenser is large, it is necessary to install the circulation air passage and the heat pump unit below the water tank.
JP 2006-87484 A JP 2004-358028 A

  For this reason, in the heat pump type washing and drying machine, if bubbles or water droplets generated in the water tank during washing or dehydration (especially during intermediate dehydration) enter the circulation air passage from the vent, There is a risk of flowing downward in the circulation air passage and leaking to the outside from the gaps between the parts constituting the circulation air passage, or being applied to the components in the circulation air passage.

  In order to cope with such a situation, for example, it is considered to provide a configuration in which a portion once raised above the vent is provided in the circulation air passage. In such a configuration, even if bubbles or the like once enter the circulation air passage from the vent, the bubbles or the like are partly made higher than the vent, so that it is difficult to enter deeper than that. It can be expected to be returned from the vent to the water tank side. However, it is not possible to completely prevent bubbles from entering the inside of the circulation air passage by itself.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to more reliably prevent bubbles from entering the back of the circulation air passage, and to blow air flowing through the circulation air passage. It is in providing the washing-drying machine which can prevent the fall of efficiency as much as possible.

  In order to achieve the above-mentioned object, the washing and drying machine of the invention of claim 1 has a water tank disposed in the outer box and a hole through which water and air can be passed, and is rotatable in the water tank. A drum which is disposed and accommodates laundry and is rotationally driven by a driving means, and a front duct and a rear part which are provided at the front part and the rear part of the water tank so as to communicate with the inside of the water tank through vents, respectively. A circulation air passage having a duct, air blowing means for circulating the air for drying through the circulation air passage and the water tank, one of the front duct and the rear duct, and the corresponding duct Corresponds to the vent in a bubble detection sensor that detects bubbles entering the duct from the vent, and a duct on the opposite side of the duct provided with the bubble detection sensor among the front duct and the rear duct To do And a bubble intrusion prevention rib that divides the inside of the duct upward toward the vent hole side and the anti-vent hole side, and prevents the bubble infiltration on the side where the rotation direction when the drum is dewatered is downward. The upper end position of the rib is set to be equal to or lower than the upper end position of the vent hole corresponding to the bubble intrusion prevention rib.

  In the present invention, since the bubble detection sensor is provided in one of the front duct and the rear duct in the circulation air passage, bubbles generated during washing or dehydration (particularly during intermediate dehydration) When entering the duct provided with the detection sensor, the bubble intrusion can be detected by the bubble detection sensor. When the bubble detection sensor detects the invasion of bubbles, stop the rotation of the drum or drain the water in the aquarium to prevent the bubbles from entering further into the circulation air passage. Is possible.

  In addition, since a bubble intrusion prevention rib is provided in the duct on the side opposite to the side where the bubble detection sensor is provided in the front duct and the rear duct, even if bubbles enter the duct from the vent hole The foam is blocked by the foam intrusion prevention ribs and quickly returned from the vent to the water tank side. For this reason, it can prevent that a bubble infiltrates into the back from the rib for bubble invasion prevention. Moreover, in this case, the upper end position of the foam intrusion prevention rib on the side where the rotation direction when the drum is dewatered is downward is the same as or lower than the upper end position of the vent hole corresponding to the foam ingress prevention rib By setting it, it is possible to prevent the bubble intrusion prevention rib from interfering with air blowing as much as possible while providing the bubble ingress prevention rib in the duct, and the blowing efficiency of the wind flowing through the circulation air passage Can be prevented as much as possible. Further, the foam detection sensor can be provided only in one duct.

  Hereinafter, an embodiment in which the present invention is applied to a drum-type washing and drying machine will be described with reference to the drawings. In FIG. 3, an outer box 1 forming an outer shell of a washing and drying machine has a laundry input port 2 on the front side (left side in FIG. 3), and a base plate having support legs 3a on the bottom. 3 is provided. On the front side of the outer box 1, a door 4 that opens and closes the laundry input port 2 is rotatably provided. A water tank 6 capable of storing water elastically supported by a plurality of suspensions 5 is disposed in the outer box 1, and a drum 7 is rotatably provided in the water tank 6.

  The drum 7 has a cylindrical shape in which the rear surface is closed and the front surface is open, and the axis A is a horizontal axis whose front-rear direction is the front-rear direction (left-right direction in FIG. 3). It is arranged. A number of holes 8 through which water and air can be passed are formed in the peripheral wall of the drum 7. The water tank 6 also has a substantially cylindrical shape with the rear surface closed and the front surface opened. Like the drum 7, the direction of the axis A is a horizontal axis shape that is the front-rear direction (the left-right direction in FIG. 3). In addition, they are arranged in an upwardly inclined state.

  A water tank cover 9 is provided at the front of the water tank 6. As shown in FIG. 4, the water tank cover 9 has an annular shape as a whole, and is fitted and attached to the opening peripheral edge of the front surface of the water tank 6 so as to protrude inwardly in a bowl shape. The water tank cover 9 covers the front plate 7a of the drum 7 and functions as a protective cover for the so-called rotating part.

  Further, a flexible bellows 10 is provided in a watertight manner between the front end of the water tank cover 9 and the laundry input port 2 so as to prevent water from splashing from the water tank 6 to the outside. Yes. Therefore, the front opening of the water tub 6 (the opening 9 a of the water tub cover 9) and the front opening of the drum 7 face the laundry input port 2. The drum 7 is directly rotated by a motor 11 formed of an outer rotor type DC brushless motor provided on the back side of the water tank 6. The motor 11 constitutes drive means for driving the drum 7 to rotate.

  The water tank cover 9 is formed with a hollow front duct 13 that constitutes a part of a circulation air passage 12 described later. As shown in FIG. 1, the front duct 13 includes a first branch path 13 b extending from the junction part 13 a at the lower part of the water tank cover 9 to the upper left part, and a second branch path 13 c extending from the junction part 13 a to the upper right part. As a whole, it is substantially Y-shaped when viewed from the front. The first and second branch paths 13b and 13c are each configured in an arc shape. In the upper part of these first and second branch paths 13b and 13c, on the inner peripheral surface of the water tank cover 9, there are a first front vent 14 and a second front vent 15 that constitute a vent, respectively. It is formed (see FIG. 4). Each of the first and second front vents 14 and 15 includes a plurality of openings. Among these, the first front vent 14 communicates with the inside of the first branch 13b and the inside of the water tank 6. The second front vent 15 allows the second branch 13c and the water tank 6 to communicate with each other.

  In this case, in FIG. 1, the lower end of the first front vent 14 on the left side is set to be at the same height as the rotation center of the drum 7. The lower end of the second front vent 15 on the right side is set to be positioned above the lower end of the first front vent 14.

  A first foam intrusion prevention rib 16 is provided integrally with the water tank cover 9 at a position inside the first branch passage 13b on the left side and facing the first front vent 14. . The first foam intrusion prevention rib 16 has a lower end portion that extends upward from the same position as the lower end of the first front vent hole 14, and passes through the first branch path 13 b in the first front side. The first vent hole 14 and the opposite side of the first front vent 14 (on the side opposite to the first front vent 14) are partitioned upward. The rear end portion of the first bubble intrusion prevention rib 16 is in contact with the inner surface of the first branch path 13b. The upper end 16 a of the first bubble intrusion prevention rib 16 is located above the upper end 14 a of the first front vent 14.

  A second foam intrusion prevention rib 17 is also provided integrally with the water tank cover 9 at a position inside the second branch passage 13 c on the right side and facing the second front vent 15. The second bubble intrusion prevention rib 17 also has a lower end portion that extends upward from the same position as the lower end of the second front vent hole 15 and passes through the second branch passage 13c in the second front side. It is configured to partition upward on the side vent 15 side and the side opposite to the second front vent 15 (on the side opposite to the second front vent 15). The rear end portion of the second bubble intrusion prevention rib 17 is also in contact with the inner surface of the second branch passage 13c. In this case, the position of the upper end 17a of the second bubble intrusion prevention rib 17 is set to be slightly lower than the upper end 15a of the second front vent 15 (see difference B in FIG. 1). The upper end 17a position of the second bubble intrusion prevention rib 17 may be set to be the same height position as the upper end 15a position of the second front vent 15.

  In the aquarium cover 9, first and second covers 18 and 19 projecting upward are provided at portions corresponding to the upper part of the first branch path 13b and the upper part of the second branch path 13c. The upper portions of the first branch path 13b and the second branch path 13c are broadly formed by the first and second covers 18, 19. In this case, as shown in FIG. 5, the width of the fitting part 20 between the second branch path 13c on the right side and the second cover 19 is set small, and the opening width W1 at the top of the second branch path 13c is set. While setting as wide as possible, the opening width W2 of the second cover 19 connected thereto is also set as wide as possible. Then, by setting the opening width W1 of the upper portion of the second branch path 13c and the opening width W2 of the second cover 19 to be substantially equal, the second branch path 13c and the second cover 19 The connection portion 21 has a configuration in which the step on the inner surface is eliminated.

  A rear vent 23 constituting a vent is formed in the upper rear surface of the water tank 6, and the rear vent 23 is connected to the drum via a vent path 24 and a vent 25 formed in the rear surface of the drum 7. 7 communicates with the inside.

  The first and second front vents 14 and 15 and the rear vent 23 communicate with each other outside the water tank 6 through a circulation air passage 12, and a drying means is provided in the middle of the circulation air passage 12. A dripping device 26 is provided. The circulation air passage 12 includes the front duct 13, an extendable joint 27 connected to the junction 13a at the lower part of the front duct 13, a duct 28a of the evaporator 28 serving as a dehumidifying means, and a condensation serving as a heating means. The duct 29a of the vessel 29, the casing 30a of the blower 30 as the blowing means, the extendable joint 31, the rear duct 32 provided at the back of the water tank 6, and the like are connected.

As shown in FIG. 2, the rear duct 32 has one end communicating with the rear vent 23, and the other end is once higher than the rear vent 23 and then extends downward. A lower end portion is connected to the joint 31. In the rear duct 32, a bubble detection sensor 33 is provided in the vicinity of the rear vent 23. The bubble detection sensor 33 is connected to the pressure sensor 35 via the connection pipe 34. A filter case 36 having a lint filter (not shown) is provided between the joint 27 and the duct 28a of the evaporator 28.
Therefore, the circulation air passage 12 is provided so as to communicate with the inside of the water tank 6 through the first and second front vents 14 and 15 and the rear vent 23. The evaporator 28 and the condenser 29 constitute a heat pump 37 together with a compressor and a capillary tube (not shown).

The heat pump 37 is provided below the outside of the water tank 6, and as is well known, from a refrigeration cycle in which refrigerant circulates in the order of a condenser 29, a capillary tube (throttle) not shown, and an evaporator 28 by a compressor not shown. In the configuration, in the drying operation, the circulating air is heated by the condenser 29 to be warmed, and the warmed air is sent into the water tank 6 and the drum 7 through the rear duct 32 by the blower 30 (FIG. 3). Arrow C1). The warm air contributes to the drying of the laundry, and is discharged from the first and second front vents 14 and 15 to the front duct 13 side. The warm air is cooled and dehumidified by the evaporator 28 and condensed again. It heats with the container 29 (refer arrow C2 of FIG. 3).
In FIG. 3, a drain hose 38 connected to the bottom of the aquarium 6 can be drained outside the machine via a drain valve (not shown), and drains for draining dehumidified water cooled and condensed by the evaporator 28. Means (not shown) are provided.

Next, the operation of the above configuration will be described.
In the above-described drum type washing and drying machine, when a standard operation course is selected and set to start operation, as is well known, by controlling a water supply valve, a drain valve, a motor 11 and the like (not shown) by a control device (not shown), The steps of washing, intermediate dehydration, rinsing, final dehydration and drying are performed automatically.

  In the washing process, water and detergent are supplied into the water tank 6 and the drum 7 is rotated forward and backward at a low speed. Thereby, the laundry in the drum 7 is washed. In this washing process, bubbles due to detergent are generated in the water tank 6. If the amount of foam generated is large, the foam may enter the rear duct 32 from the rear vent 23 or the first and second first ducts of the front duct 13 from the first and second front vents 14 and 15. May enter the branch paths 13b and 13c.

  Here, when bubbles enter the rear duct 32 from the rear vent 23, it can be detected by the bubble detection sensor 33. Control related to the bubble detection sensor 33 will also be described. In the washing process, first, at the start of water supply, the output of the pressure sensor 35 connected to the bubble detection sensor 33 is detected and stored as a reference value P0. In the washing process, each time the drum 7 is reversed, the pressure P of the pressure sensor 35 is detected, and a difference ΔP between the reference value P0 and the detected pressure P is obtained by calculation (ΔP = P0−P). Then, the difference ΔP is compared with a preset threshold value KP to determine whether or not the difference ΔP is larger than the threshold value KP. When it is determined that the difference ΔP is larger than the threshold value KP (ΔP> KP), it is determined that the amount of generated bubbles is large, and otherwise the amount of generated bubbles is determined to be small.

  If it is determined that the amount of foam generated is large, the control device may stop the rotation of the drum 7 because the foam that has entered the rear duct 32 may enter deeper if the washing process is continued further. Then, the drain valve is opened and the washing water in the water tank 6 is discharged. Count the number of drains N. When draining in the middle of the washing process, after the drainage, water is supplied again and the washing process is performed again. By controlling in this way, even if bubbles enter the rear duct 32, the bubbles can be prevented from entering the back of the rear duct 32.

  In the washing step, when bubbles in the water tank 6 enter the first and second branch passages 13b and 13c of the front duct 13 from the first and second front vents 14 and 15, Since the first and second bubble intrusion prevention ribs 16 and 17 are provided in the first and second branch paths 13b and 13c, respectively, the bubbles are the first and second bubble intrusion prevention ribs. It is blocked by 16, 17 and is quickly returned from the front vents 14, 15 to the water tank 6 side (see arrows D1, D2 in FIG. 1).

  When the washing process is completed, after the water in the water tank 6 is discharged, intermediate dehydration is performed by rotating the drum 7 in one direction (in the direction of arrow E in FIG. 3) at high speed. Thereby, the laundry in the drum 7 is centrifugally dehydrated. Even in this intermediate dehydration, when the amount of foam generated in the water tank 6 is large, the foam may enter the rear duct 32 from the rear vent 23 or the first and second front vents 14 and 15. May enter the first and second branch passages 13b and 13c of the front duct 13 from the front.

  When performing the intermediate dehydration, the control device controls the rotation of the drum 7 during the intermediate dehydration using the detection data of the foam detection sensor 33 (pressure sensor 35) in the washing process. Specifically, it is determined whether or not the count value of the number N of discharged water is large in the washing process and the number N of discharged water is 1 or more. When the rotation speed is set lower than the normal rotation speed and the count value of the number N is 0, the drum 7 is set to the normal rotation speed. As a result, when foam is generated frequently during the washing process, foam generation is expected to increase even during intermediate dewatering. Therefore, by setting the number of rotations of the drum 7 during intermediate dewatering to a low value, the amount of foam generated can be reduced. It becomes possible to suppress.

  In the intermediate dehydration, the first front vent 14 on the left side of the first and second front vents 14 and 15 is the side on which the rotation direction of the drum 7 (arrow E direction) is upward, The second front vent 15 on the right side is the side on which the rotation direction of the drum 7 is downward.

  On the left side where the rotation direction of the drum 7 is upward, the amount of foam generated is large because the foam accumulated in the bottom of the water tank 6 is swept up by the drum 7. Accordingly, many bubbles pass through the first front vent 14 on the left side, but the lowermost position thereof is set at substantially the same height as the rotation center of the drum 7, and the first front vent is set. The bubbles that have passed through the first front vent hole 14 are moved to a first direction by bringing the direction of the first peripheral wall 13 of the first branch passage 13b close to the vertical direction. As soon as it comes into contact with the foam intrusion prevention rib 16, it moves downward and returns to the water tank 6 from the first front vent 14.

  On the right side where the rotation direction of the drum 7 is downward, bubbles in the water tank 6 hardly rise, and the uppermost surface of the bubbles is lower than the left side. Further, when bubbles adhering to the side wall of the drum 7 are blown off by the rotation of the drum 7, it is difficult to fly upward by the amount of gravity. Accordingly, it is preferable that the second front vent 15 on the right side is provided above the first vent 14 on the left side. Further, even if the upper end 17a of the second bubble intrusion prevention rib 17 is set slightly lower than the upper end 15a of the second front vent 15, bubbles and the like are not in the upper end of the second bubble intrusion prevention rib 17. It is possible to prevent intrusion to the back beyond 17a.

  The rinsing process after the completion of the intermediate dehydration is performed in the same manner as the washing process except that no detergent is used when supplying water. After the rinsing process, a final dehydration process is performed. Similar to the intermediate dehydration process, the final dehydration process is performed by rotating the drum 7 at a high speed in one direction (the direction of arrow E in FIG. 1) after discharging the water in the water tank 6. In the rinsing process and the final dehydration process, since there is almost no detergent, there is almost no generation of bubbles.

  When the final dehydration process is completed, a drying process is performed. In this drying process, the drum 7 is rotated in both forward and reverse directions at a low speed, and the blower 30 and the compressor of the heat pump 37 are driven. The air warmed by the condenser 29 passes through the rear duct 32 and is supplied from the rear vent port 23 into the water tank 6 and eventually into the drum 7 by the blowing action of the blower 30. This hot air takes away moisture from the laundry in the drum 7. The warm air (exhaust air) deprived of moisture enters the first and second branch passages 13 b and 13 c of the front duct 13 from the first and second front vents 14 and 15 in the front portion of the water tank 6. enter. At this time, the first and second bubble entry prevention ribs 16 and 17 exist in the first and second branch passages 13b and 13c. The warm air that has entered from 15 passes over the first and second bubble intrusion prevention ribs 16 and 17 and then flows downward in the first and second branch paths 13b and 13c. The warm air merges at the merge section 13a and then flows to the evaporator 28 side. The warm air flowing to the evaporator 28 side is cooled and dehumidified in the evaporator 28 and heated again in the condenser 29. By repeating this, the laundry is dried. In this process, the lint of the laundry is captured by the lint filter in the filter case 36.

According to the above-described embodiment, the following operational effects can be obtained.
Since the bubble detection sensor 33 is provided in the rear duct 32 of the front duct 13 and the rear duct 32 in the circulation air passage 12, bubbles generated during washing or dehydration (particularly during intermediate dehydration) are detected. When entering the rear duct 32 provided with the sensor 33, the bubble intrusion can be detected by the bubble detection sensor 33. When the bubble detection sensor 33 detects the invasion of the bubbles, the bubbles may further intrude into the circulation air passage 12 by stopping the rotation of the drum 7 or draining the water in the water tank 6. Can be prevented.

  Further, first and second foam intrusion prevention ribs 16 and 17 are provided in the front duct 13 on the opposite side of the front duct 13 and the rear duct 32 from the side on which the foam detection sensor 33 is provided. Therefore, even if bubbles enter the first and second branch passages 13b and 13c of the front duct 13 from the first and second front vents 14 and 15, the bubbles are first, It is blocked by the second foam intrusion prevention ribs 16 and 17 and is quickly returned from the first and second front vents 14 and 15 to the water tank 6 side. For this reason, it is possible to prevent the bubbles from entering deeper than the first and second bubble intrusion prevention ribs 16 and 17.

  Moreover, in this case, the position of the upper end 17a of the second bubble intrusion prevention rib 17 on the side where the rotation direction when the drum 7 is dehydrated is downward is set to the second front corresponding to the second bubble intrusion prevention rib 17. By setting so as to be lower than the position of the upper end 15a of the part vent hole 15, the second bubble entry prevention rib 17 is provided in the second branch path 13c, but the second bubble entry prevention rib 17 is provided. It is possible to prevent the ribs 17 from interfering with air blowing as much as possible, and it is possible to prevent a reduction in the air blowing efficiency of the wind flowing through the circulation air passage 12 as much as possible. Furthermore, the bubble detection sensor 33 can be simply provided in the rear duct 32.

  The water tank 6 and the drum 7 are disposed so that their axial directions are inclined upwardly, and the foam detection sensor 33 is provided in the rear duct 32. According to this configuration, when bubbles are generated, the bubble generation sensor 33 is provided in the rear duct 32 on the rear side where bubbles are likely to collect, so that the generation of bubbles can be detected well.

  In the upper part of the second branch passage 13c on the side where the second bubble intrusion prevention rib 17 is provided in the front duct 13, the upper duct 13 is positioned above the second bubble intrusion prevention rib 17, A structure in which a second cover 19 for widening the passage in the second branch path 13c is provided, and a step on the inner surface of the connecting portion 21 between the second branch path 13c and the second cover 19 is eliminated. Therefore, it is possible to flow the wind flowing as smoothly as possible from the second front vent 15 into the second branch 13c and over the second bubble intrusion prevention rib 17. Therefore, it is possible to prevent a decrease in blowing efficiency.

  Incidentally, in the case of the configuration shown in FIG. 6 as a comparative example, the width of the fitting portion 40 between the second branch path 13c and the second cover 19 is large, and the upper portion of the second branch path 13c. The opening width W4 of the second cover 19 is set smaller than the opening width W3. And it is set as the structure which had the level | step difference in the inner surface of the connection part 41 of the 2nd branch path 13c and the 2nd cover 19. FIG. In such a configuration, the resistance of the wind flowing from the second front vent 15 into the second branch 13c over the second bubble intrusion prevention rib 17 is large, and the blowing efficiency Would be reduced. In this regard, according to the above-described embodiment, it is possible to prevent such a problem as much as possible.

  Using the detection data of the foam detection sensor 33 during washing, the rotation of the drum 7 during dehydration is controlled. Specifically, in the washing process, when the foam detection sensor 33 determines that the amount of foam generated is large, the rotational speed of the drum 7 during dehydration, particularly during intermediate dehydration, should be set lower than usual. Therefore, it is possible to suppress the generation amount of bubbles and prevent the bubbles from entering the rear duct 32 and the front duct 13 more reliably.

The present invention is not limited to the above-described embodiment, and can be modified or expanded as follows.
The water tank 6 and the drum 7 may be disposed so that their axial directions are substantially horizontal.
The direction of the wind flowing through the circulation air passage 12 may be reversed, and the front duct 13 may be used for air supply and the rear duct 32 may be used for exhaust.

The front view which fractures | ruptures the front duct vicinity which shows one Embodiment of this invention and abbreviate | omits a drum Rear view near the rear duct Full vertical side view showing partially broken Perspective view from the front of the aquarium cover Longitudinal sectional view taken along line XX in FIG. FIG. 5 equivalent diagram showing a comparative example

Explanation of symbols

  In the drawings, 1 is an outer box, 6 is a water tank, 7 is a drum, 8 is a hole, 9 is a water tank cover, 11 is a motor, 12 is a circulation air passage, 13 is a front duct, 13a is a junction, and 13b is the first. 13c is the second branch, 14 is the first front vent (vent), 15 is the second front vent (vent), 15a is the upper end, and 16 is the first bubble. Intrusion prevention ribs, 17 is a second bubble entry prevention rib, 17a is an upper end, 18 is a first cover, 19 is a second cover, 21 is a connection portion, 23 is a rear vent (vent), 26 Denotes a drying device (drying means) 28, an evaporator, 29 a condenser, 30 a blower (blower means), 32 a rear duct, 33 a foam detection sensor, and 37 a heat pump.

Claims (4)

A water tank disposed in the outer box;
A drum which has a hole through which water and air can be passed and is rotatably arranged in the water tub, which accommodates laundry and is driven to rotate by driving means;
A circulation air passage having a front duct and a rear duct provided to communicate with the inside of the water tank through vents at the front and rear of the water tank, respectively.
Air blowing means for circulating air for drying through the circulation air passage and the water tank;
A foam detection sensor that is provided in one of the front duct and the rear duct, and detects foam that enters the duct from the corresponding vent,
Among the front duct and the rear duct, in the duct on the opposite side to the duct provided with the bubble detection sensor, the inside of the duct is arranged on the vent side and the counter vent side. And a foam intrusion prevention rib for partitioning upward,
The upper end position of the foam intrusion prevention rib on the side where the rotation direction during dewatering of the drum is downward is set to be equal to or less than the upper end position of the vent hole corresponding to the foam intrusion prevention rib. Washing and drying machine characterized by that.   The said water tank and drum are arrange | positioned so that those axial directions may be in the state of rising upward, and the said foam detection sensor is provided in the said rear duct. Washing and drying machine.   A cover that is positioned above the foam intrusion prevention rib on the side of the front duct and the rear duct on the side where the foam intrusion prevention rib is provided, and widens the passage in the duct. The washing / drying machine according to claim 1, wherein a step on an inner surface of a connection portion between the duct and the cover is eliminated.   The washing / drying machine according to claim 1, wherein rotation of the drum at the time of dehydration is controlled using data of the foam detection sensor at the time of washing.

Images