JP5303619B2 - Drum washing machine - Google Patents

Description

  The present invention relates to a washing machine such as a drum type washing machine.

  In a washing machine, one provided with a drying function is known. A washing machine having a drying function is known to have a circulation air passage that takes out the air in the washing tub during the drying operation, dehumidifies and heats the taken-out air, and returns the heated air to the washing tub. (See, for example, paragraph [0034] of Patent Document 1).

  The circulation air path is a path for circulating the air in the washing tub during drying, but water used for washing and bubbles generated by the washing process may enter during washing. For this reason, a configuration in which a pair of electrodes are provided in a circulating air passage as a means for detecting water and bubbles that enter is known (for example, paragraph [0045] of Patent Document 1).

  Furthermore, when drying, the shape of the glass window provided on the open / close door that closes the washing tub is circulated from the periphery to the center so that the hot air that is circulated through the circulation air passage and efficiently dries the laundry. It has been proposed to use an inclined surface or a curved surface inclined toward the surface (for example, paragraph [0025] of Patent Document 2).

Japanese Patent Laying-Open No. 2005-143531 Japanese Patent Laid-Open No. 2005-481

  In the washing machine described in Patent Document 1, the inlet of the circulation air passage is connected to the upper part of the washing tub, and the air that has entered the circulation air passage from above the washing tub moves from the upper part to the lower part of the circulation air passage. In the meantime, it is heated by the heater, and heated air is given from the lower end side of the circulation air passage to the washing tub. A pair of electrodes for water / foam detection is arranged in the vicinity of the lower end side of the circulation air passage.

  Instead of such a configuration, as described in Patent Document 2, the air in the washing tub is taken out from the lower end side of the circulation air passage, and the taken-out air flows upward in the circulation air passage, If a configuration is adopted in which air is heated and applied from the upper part into the washing tub, if an electrode for foam detection is provided near the lower part of the circulation air passage, the electrode will be exposed to the air flowing out of the washing tub. become. And since the air which flows out of a washing tub contains the fine lint and waste thread which generate | occur | produce from a laundry, the subject that a lint and waste thread are easy to adhere to an electrode became clear.

  In particular, when a bubble detection sensor that detects the presence or absence of bubbles based on whether or not a pair of electrodes conducts is used, the distance between the pair of electrodes is close, and lint and lint adhere between the electrodes. When the next washing, etc., even though the foam does not enter the circulation air passage, the electrodes are connected by lint and lint that adheres between the electrodes, which leads to erroneous detection that the foam has entered. The problem was also found.

  Moreover, in the said patent document 2, although the shape of the glass window of an opening-and-closing door is devised, the glass window of the structure by which the laundry in a rotating drum does not get tangled, and the entrance and exit of a rotating drum is blocked | closed favorably There was room for improvement.

  An object of the present invention is to provide a plug-type body provided in a door that closes the entrance and exit of an outer tub and a rotary drum in a drum-type washing machine. It is to improve to a configuration that does not reduce the volume.

According to the first aspect of the present invention, the outer tub having a substantially cylindrical inner peripheral surface whose one end surface is an entrance / exit of the laundry, the outer tub is rotatably provided, and the one end surface is an entrance / exit of the laundry A rotating drum for storing laundry, a washing tub including an outer tub and a rotating drum, an openable / closable door provided to close the entrance and exit of the outer tub and the rotating drum, In the drum type washing machine, the door has a plug body, the plug body faces the doorway of the outer tub, and closes the doorway of the outer tub when the door is closed. A front peripheral surface portion, a rear peripheral surface extending rearward from the front peripheral surface portion, and a rear end surface entering the inside of the entrance / exit of the rotating drum, and a rear end surface closing a region surrounded by the rear peripheral surface portion The rear end surface has at least a central portion at the center. So as to be positioned further forward than the entrance of the drum, curved toward the front, has a least the center recessed surface when viewed from the rotary drum,
A drainage valve for discharging water in the washing tub by opening and closing control is provided, and the drainage valve is connected to a filter unit that captures lint or foreign matter contained in the water discharged from the outer tub , It is a drum type washing machine.

  The invention according to claim 2 is characterized in that the plug body is curved forward of the rotary drum from the inlet / outlet of the rotating drum, rather than the volume of the rear peripheral surface portion entering the inlet / outlet of the rotating drum from the inlet / outlet of the rotating drum, The entrance dimension of the rear peripheral surface portion and the curved dimension of the rear end surface are set so that the volume of the space formed in front of the entrance / exit of the rotary drum is increased by the curvature. The drum-type washing machine according to Item 1.

  According to the first aspect of the present invention, the plug provided on the door includes a front peripheral surface portion for closing the outer tank inlet / outlet so as to face the inlet / outlet of the outer tank, and a rear peripheral surface portion inserted into the inlet / outlet of the rotary drum. Therefore, the front peripheral surface portion reliably closes the entrance / exit of the outer tub, and even if the laundry in the rotating drum tries to exit from the entrance / exit of the rotating drum, the rear periphery enters the inside of the entrance / exit of the rotating drum. The surface portion prevents the laundry in the rotating drum from coming out of the entrance / exit.

  In addition, the rear peripheral surface portion of the plug body enters the inside of the rotary drum, but the rear end surface is curved so as to swell forward from the entrance and exit of the rotary drum, and the internal volume of the rotary drum is The laundry is not narrowed by the rear end face, and the laundry can be washed and dried well.

  In the invention according to claim 2, the rear end surface is curved toward the front rather than the volume in which the rear peripheral surface portion of the plug body enters inward from the entrance / exit of the rotary drum, thereby increasing the internal volume of the rotary drum. The shape of the plug is set so that the amount is larger. Therefore, it is possible to provide a plug body in which the entrance / exit of the rotary drum is satisfactorily closed and the internal volume of the rotary drum is not reduced.

1 is a front view of an electric washing machine according to an embodiment of the present invention. It is the perspective view which looked at the electric washing machine which concerns on one Embodiment of this invention from the left back diagonal upper part. It is the perspective view which looked at the electric washing machine which concerns on one Embodiment of this invention from the right rear. In the electric washing machine which concerns on one Embodiment of this invention, it is right sectional drawing of the state which opened the door. It is a purification circulation channel figure showing composition of a circulation channel which circulates water in an electric washing machine concerning one embodiment of this invention, and an ozone supply channel which supplies air containing ozone. It is a perspective view of a dry air path. It is a rear view of a dry air path. It is an exploded view of a dry air path. (A) is a cut surface sectional view which follows AA of Drawing 7, (B) is a cut surface sectional view which meets BB of Drawing 7. It is a perspective view of an electrode. FIG. 8 is a cross-sectional view taken along a line CC in FIG. 7. It is a longitudinal section end view of a washing tub and a door concerning one embodiment of this invention. It is a perspective view of a forming door glass.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a front view of an electric washing machine 10 according to an embodiment of the present invention. The electric washing machine 10 includes a housing 11 having a substantially rectangular shape in a front view and constituting an outer shell thereof. A washing tub (described later) is disposed above the housing 11, and a water storage tank (described later) is disposed below the inside of the housing 11.

  An opening is formed above the front surface of the housing 11, and a door 12 that can be opened and closed is provided in the opening. The door 12 is made of, for example, tempered glass whose main surface is transparent, and the state of the laundry in the laundry tub inside can be visually recognized.

  An operation / display unit 13 is disposed on the front upper portion of the housing 11 (above the door 12). In the operation / display unit 13, a plurality of operation keys 14, a plurality of displays 15, and a liquid crystal display 16 are arranged.

  FIG. 2 is a perspective view of the electric washing machine 10 as viewed obliquely from the upper left rear, with the back panel and the top panel constituting the housing 11 removed. FIG. 3 is a perspective view of the electric washing machine 10 as viewed from the right rear, and is a perspective view in a state in which the housing 11 is removed except for the housing base 11B. FIG. 4 is a right side sectional view of the electric washing machine 10 in a state where the door 12 is opened.

  2 to 4, the electric washing machine 10 is provided with a washing tub 20 as a processing tub. The washing tub 20 includes an outer tub 21 having a substantially cylindrical inner peripheral surface and a rotating drum 24 that is a cylindrical inner tub provided in the outer tub 21. A DD motor 22 is attached to the back surface of the outer tub 21, and the rotating drum 24 can be rotated in the outer tub 21 by the DD motor 22. In addition, the rotating shaft of the rotating drum 24 employs a so-called oblique drum structure in which the front is inclined obliquely upward with respect to the horizontal direction. The outer tub 21 is attached to the housing base 11 </ b> B by a plurality of dampers 23.

  A water inlet unit 25 is provided on the upper right side of the outer tub 21. The water inlet unit 25 is a unit through which water passes when the water for rinsing is supplied into the outer tub 21. The unit 25 is provided with a detergent container 27 (see FIG. 5). The supplied water flows through the detergent container 27, and accordingly, the detergent is supplied with water or not supplied. It can be selected.

  This electric washing machine 10 can use bath water for easy washing. For this purpose, a bath water pump 26 is provided adjacent to the left side of the water inlet unit 25.

  Further, the washing tub 20 can be dried in addition to washing and rinsing. For this purpose, a drying air passage 28 is connected to the left rear side of the outer tub 21. The drying air passage 28 constitutes a part of the circulation air passage, and sucks out moist air from, for example, the lower rear portion of the outer tub 21 and dehumidifies the air while guiding the air upward. A blower unit 29 is connected to the upper part of the drying air passage 28 via a connection hose 60. The blower unit 29 is for sending the dehumidified air guided by the drying air passage 28 into the outer tub 21 again. In the blower unit 29, a heater (not shown) for heating the air to be fed is provided. Here, the drying air passage 28, the connection hose 60, and the blower unit 29 function as a circulation air passage, and this circulation air passage is connected to the outer tub 21 so as to have a height difference.

  The electric washing machine 10 further includes an ozone generation unit 30 in the vicinity of the blower unit 29. As will be described later, the ozone generation unit 30 functions as water purification means, generates ozone even during drying and air washing, and disinfects and deodorizes the laundry to be dried, and puts it in the washing tub 20. Contributes to air washing that disinfects and deodorizes the laundry. The air wash is a process of applying air containing ozone to the laundry housed in the rotary drum 24 and performing sterilization and deodorization of germs attached to the laundry by ozone. It is an independent process different from the washing and drying process. In an air wash, since the laundry is washed with air by air containing ozone (air), it is as if sterilization and deodorization are performed. Disinfection / deodorization is called air wash.

  The electric washing machine 10 is provided with a water storage tank 40 below the washing tub 20. The water storage tank 40 is a tank for storing water drained from the outer tub 21 and bath water pumped up by the bath water pump 26. In the vicinity of the water storage tank 40, a circulation pump 41 for pumping out water from the water storage tank 40 is provided.

  In addition, a large number of hoses are arranged in order to move water between the outer tub 21, the water inlet unit 25, the drying air passage 28, the water storage tank 40, and the like, and to move air containing ozone.

  FIG. 5 is a purification circulation channel diagram showing a configuration of a circulation channel for circulating water and an ozone supply channel for supplying air containing ozone in the electric washing machine 10 described with reference to FIGS.

  Referring to FIG. 5, tap water supplied from faucet 43 is supplied into washing tub 20 through water inlet unit 25 and connection hose 45 by opening / closing control of water supply valve 44. At this time, by switching the water supply valve 44, the tap water flows through the first flow path 46 in the detergent container 47 in the water inlet unit 25, or passes through the second flow path 48 and flows in the water inlet unit 25. It can be selected whether to flow through the softener container 49.

  The water in the washing tub 20 (outer tub 21) can be discharged by controlling the opening and closing of the drain valve 51 provided in the drain pipe 50. A filter unit 53 is connected to the drain valve 51 via an intermediate hose 52. The filter unit 53 is for capturing lint and foreign matter contained in the water discharged from the outer tub 21. The water that has entered the filter unit 53 passes through the drain pipe 54 and the valve 83 and is discharged from the drain hose 55 to the outside of the housing 11. Outside the housing 11, for example, it passes through the external drain hose 56 and is discharged to the drain trap 57.

  The above is the flow of water when not performing the water-saving function when washing and rinsing with tap water.

  In the drying process, a blower (not shown) in the blower unit 29 is operated, and the air in the washing tub 20 flows out into the drying air passage 28, passes through the connection hose 60, is heated in the blower unit 29, and is connected to the connection hose. It returns to the washing tub 20 through 61. The laundry in the washing tub 20 is dried by this air circulation. The warm and humid air in the washing tub 20 is dehumidified by heat exchange in the drying air passage 28. Therefore, the water supply valve 44 is controlled to open and close, and the tap water supplied from the faucet 43 passes through the water supply hose 62 and is supplied into the drying air passage 28 for heat exchange.

  If the ozone generation unit 30 is operated while the blower unit 29 is operating, the ozone generated by the ozone generation unit 30 is taken into the blower unit 29 via the air hose 64 due to the negative pressure generated by the blower unit 29. The taken-in ozone is supplied to the washing tub 20 through the connection hose 61, and the sterilization and deodorization of the laundry stored in the rotating drum 24 is performed.

  The above is the flow of water and air during drying when the water-saving function is not performed.

  As described above, the electric washing machine 10 according to this embodiment can be easily washed with bath water. Therefore, a bath water pump 26 is provided. A bath water hose 67 for pumping bath water from the bathtub 66 can be connected to the bath water pump 26. The bath water pump 26 is a self-contained pump and is connected to a priming water channel 70 for supplying priming water. When the opening and closing of the water supply valve 44 is controlled and the tap water supplied from the faucet 43 is supplied to the water inlet unit 25, a part thereof is supplied to the bath water pump 26 through the priming water channel 70. The supplied water (priming water) enables the bath water pump 26 to pump up the bath water. Then, the bath water pumped up through the bath water hose 67 passes through the water supply hose 71 connected to the discharge port of the bath water pump 26, flows through the circulation valve 72, the ejector 73 and the connection hose 74, and is stored in the water storage tank 40. .

  When the bath water passes through the ejector 73 and the ozone generation unit 30 is energized, the ozone generated in the ozone generation unit 30 is given to the ejector 73 through the air hose 75. In the ejector 73, ozone is taken in from the air hose 75 by the negative pressure generated when the bath water flows, and the ozone is mixed into the bath water. Therefore, the bath water stored in the water storage tank 40 is mixed with ozone while being stored and is subjected to the first purification process. The first purification process is a purification process that is performed when the water tank 40 flows into the storage tank 40.

  One end of a connection hose 77 is connected to the water storage tank 40, and bath water accumulated in the water storage tank 40 can be pumped out. The other end of the connection hose 77 is connected to the suction port of the circulation pump 41. Circulation pump 41 is also a self-contained pump, and priming water can be supplied through water injection hose 78. When the water supply valve 44 is controlled to be opened and closed, and tap water supplied from the faucet 43 is supplied to the water inlet unit 25, a part thereof is supplied to the bath water pump 26 via the priming water channel 70 as described above. At the same time, priming water is supplied to the circulation pump 41 via the water injection hose 78.

  A circulation valve 72 is connected to the discharge port 79 of the circulation pump 41. The circulation valve 72 is a five-way valve, and the connection hose 74 is connected to the first outlet via the ejector 73 described above, and the water in the water storage tank 40 pumped out from the connection hose 77 is circulated. Can do. By drawing out water from the water storage tank 40 and circulating it through the ejector 73, the ozone generated by the ozone generation unit 30 can be mixed when passing through the ejector 73, and the bath stored in the water storage tank 40. The secondary purification process can be performed using ozone in the water. The second purification process is a purification process performed by circulating bath water stored in the water storage tank 40.

  A water supply hose 80 is connected to the second outlet, water is supplied to the water inlet unit 25 via the water supply hose 80, and the water storage tank 40 is supplied from the water inlet unit 25 to the washing tub 20 via the connection hose 45. Of water can be supplied.

  One end of a connection hose 81 is connected to the third outlet, and the other end opens to a chamber (not shown) in the drying air passage 28. Therefore, the water discharged from the circulation pump 41 can be dropped from the chamber into the drying air passage 28 and used as water for heat exchange in the water storage tank 40. In addition, the surplus water that has not been used for heat exchange passes through the connection hose 63 from the chamber and returns to the water storage tank 40.

  One end of a connection hose 82 is connected to the fourth outlet, and the other end is connected to the drain pipe 54 via a valve 83. Therefore, by switching the circulation valve 72 and controlling the opening and closing of the valve 83, the water in the water storage tank 40 can be discharged from the drain hose 55 to the outside of the machine.

  The electric washing machine 10 not only stores bath water in the water storage tank 40 and purifies the bath water, but also stores water that is discharged from the washing tub 20 and used for rinsing. For this purpose, the filter unit 53 is provided with an outlet connected to one end of the intermediate hose 85 in addition to the outlet connected to the drain pipe 54. The other end of the intermediate hose 85 is communicated with the water storage tank 40 via a valve 86. Therefore, by controlling the switching of the valve 83 and the valve 86, the water discharged from the outer tub 21 passes through the drain pipe 50, the drain valve 51, the intermediate hose 52, the filter unit 53, the intermediate hose 85, and the valve 86. It can be stored in the water storage tank 40.

  The used water stored in the water storage tank 40 can also be purified using ozone by circulating the circulation path passing through the connection hose 77, the circulation pump 41, the circulation valve 72, the ejector 73 and the connection hose 74. it can.

  Furthermore, one end of an overflow hose 88 is connected to the outer tub 21, the other end of the overflow hose 88 is connected to one end of an overflow hose 89, and the other end of the overflow hose 89 is connected to a valve 83. When the water accumulated in the outer tub 21 overflows above a predetermined water level, the water is discharged through the overflow hoses 88 and 89. At that time, the atmospheric pressure in the outer tub 21 needs to be equal to the external atmospheric pressure. Therefore, the connection part of the overflow hoses 88 and 89 and the inlet of the filter unit 53 are connected by the air hose 90 so that the atmospheric pressure in the outer tub 21 becomes equal to the external atmospheric pressure.

  The water storage tank 40 is also provided with an overflow hose 91. The overflow hose 91 is connected to the drain hose 55 via the valve 83.

  Further, in order to detect the water level in the washing tub 20, a lower end of an air trap hose 92 is connected to the drain pipe 50, and a water level sensor 93 is provided at the upper end of the air trap hose 92. Therefore, the water level in the washing tub 20 can be confirmed by the water level sensor 93.

  Further, the water storage tank 40 is also provided with an air trap hose 94 and a water level sensor 95, so that the water level accumulated in the water storage tank 40 can be detected.

  The water storage tank 40 is provided with a drain hose 96 that can be manually opened and closed so that all the water in the water storage tank 40 can be drained and maintenance of the water storage tank 40 can be performed.

  The electric washing machine 10 is further provided with a water supply hose 98 that connects the water supply valve 44 and the outer tub 21. By controlling the switching and opening / closing of the water supply valve 44, tap water supplied from the faucet 43 can be directly supplied to the washing tub 20 via the water supply hose 98. The tap water supplied to the washing tub 20 is given to the clothes accommodated in the rotating drum 24 in the form of a shower. That is, tap water is supplied to the washing tub 20 through the water supply hose 98 so that so-called shower rinsing can be performed.

  FIG. 6 is a perspective view of the drying air passage 28, as viewed from the same direction as FIG. FIG. 7 is a rear view of the drying air passage 28, and FIG. 8 is an exploded view of the drying air passage 28.

  With reference to FIGS. 6 to 8, the drying air passage 28 communicates with a first air passage 31 extending in the up-down direction from the bottom to the top and the upper end of the first air passage 31. And a second air passage 32 extending in a substantially orthogonal direction from the upper end. Both the first air passage 31 and the second air passage 32 are formed of resin. The aforementioned connection hose 60 communicates with the tip of the second air passage 32.

  As shown in FIG. 8, the first air passage 31 is formed by combining two resin members. More specifically, the first part 33 shown in FIG. 8A is reversed from the state shown in FIG. 8B to the first part 33, and the first part 33 is combined with the first part 33. An air passage 31 is formed.

  An air intake port 331 that communicates with an air outlet (not shown) formed below the back surface of the outer tub 21 is formed below the first part 33. A communication port 332 to which the second air passage 32 is connected is formed on the upper end side of the first part 33. Further, a chevron 333 is formed at a position below the vertical center of the first part 33 so as to protrude toward the front side of the page. The Yamagata 333 includes a ridge 334 that is inclined upward with respect to the vertical direction, which is the length direction of the first part 33.

  The first part 33 is provided with a water storage section 335 formed near the edge so as not to hinder the flow of wind in the first air passage 31 above the mountain shape 333.

  As shown in FIG. 8 (B), the second part 34 combined with the first part 33 is closer to the lower side in the vertical direction, which is the length direction, at a position facing the chevron 333 of the first part 33. A chevron 343 protruding to the inner surface side is formed. The chevron 343 also has a ridge 344 extending in the direction intersecting the length direction of the second part 34. When the first part 33 and the second part 34 are combined, the ridge 334 and the ridge 344 extend in the crossing direction (see FIG. 11). Thereby, the 1st air path 31 is designed so that an air path cross section may become narrow in the middle part.

  In the second part 34, a water storage section 345 is formed at a position facing the water storage section 335 of the first part 33. Furthermore, electrode attachment holes 346 and 347 for attaching electrodes to be described later are formed in the second part 34. As is apparent from the drawing, one electrode mounting hole 346 is provided in a region near the lower end of the second part 34 and facing the air intake port 331 formed in the first part 33. The other electrode mounting hole 347 is formed above the water storage section 345.

  As shown in FIGS. 6 and 7, the ground side electrode 35 and the detection side electrode 36 are attached to the electrode attachment holes 346 and 347 formed in the second part 34 from the outer surface side of the second part 34, respectively. ing. On the outer surface of the second part 34, a boss 37 for attaching the ground side electrode 35 is formed. Similarly, a boss 38 for attaching the detection side electrode 36 is formed.

  9A is a cross-sectional view taken along the line AA in FIG. 7, and FIG. 9B is a cross-sectional view taken along the line BB in FIG. FIG. 10 is a perspective view of the ground side electrode 35 and the detection side electrode 36 (the ground side electrode 35 and the detection side electrode 36 have the same shape).

  Referring to FIG. 10, electrode 35 includes a cylindrical body 103 having a cylindrical circumferential surface 101 and a hemispherical surface 102 formed at the tip thereof, and a mounting plate 104 that holds the lower portion of cylindrical body 103. Yes. In this embodiment, the cylindrical body 103 is formed of a columnar metal having a diameter of 8 mm, and the tip is rounded into a spherical shape.

  The tip shape of the electrode 35 is not limited to a spherical shape (semispherical surface). The electrode 35 may be any curved surface that has no corners on its surface, particularly the tip surface, and to which lint and lint are difficult to adhere.

  As shown in FIGS. 9A and 9B, the electrodes 35, 36 use attachment bosses 37, 38 formed on the second part 34, and their tips are in the first air passage 31. It is attached to protrude.

  Here, the protrusion amount of the electrode 35 (36) into the air passage 31 will be described. When the area of the hemispherical surface 102 of the cylindrical body 103 is S2, the cylindrical body 103 has a relationship of S1 <S2, where S1 is the area of the cylindrical peripheral surface 101 that protrudes into the air passage 31. The amount of protrusion is set.

  Generally, the area of the electrode exposed in the air passage 31 needs to be exposed to a predetermined area or more in order to ensure detection accuracy. Therefore, in this embodiment, the diameter of the electrode (cylindrical body 103) is increased to widen the area of the cylindrical peripheral surface, the tip is rounded to a hemispherical surface, and the hemispherical surface area S2> the exposed cylindrical peripheral surface area S1. It was configured as follows. As a result, the electrode 35 (36) secures an area necessary for detection, the projection amount into the air passage 31 is reduced, and the tip of the cylindrical body 103 projecting into the air passage 31 is Because of the hemispherical surface 102, even if lint or lint passes through the air passage 31, the lint or lint is less likely to adhere to the tip of the cylindrical body 103 exposed in the air passage 31, and the electrode 35 ( 36) It is difficult for lint and lint to accumulate on 36).

  In comparison with the conventional electrode, the conventional electrode has a diameter of 3 mm and a protruding amount into the air passage 31 of about 20 mm. In this embodiment, as described above, the diameter of the electrode is as follows. Is set to 8 mm, and the projecting dimension is set to be equal to or smaller than the diameter (about 8 mm). Thereby, the accumulation of lint and lint on the electrode 35 (36) is reduced, and the occurrence of bubble detection malfunction can be reduced.

  In this embodiment, the ground-side electrode 35 is attached to the dry air passage 28 near the lower end, and the detection-side electrode 36 is attached above the center of the dry air passage 28 in the vertical direction. That is, the ground-side electrode 35 and the detection-side electrode 36 are disposed at a distance instead of being disposed close to each other as in the prior art.

  And the earth side electrode 35 was provided in the position where it submerged when water was stored in the outer tub 21 (when washing water and rinsing water were stored).

  By providing the ground-side electrode 35 at a position where water is submerged when the water is stored in the outer tub 21, the ground-side electrode 35 is washed with a water flow in a washing and rinsing process, and lint, lint, etc. Accumulation can be prevented.

  The ground side electrode 35 is originally an electrode for detecting the ground potential, and there is no problem even if it is provided at a position where it is submerged.

  11 is a cross-sectional view taken along the line CC in FIG. As described with reference to FIG. 8, chevron 333, 343 and ridges 334, 344 are formed in first part 33 and second part 34 constituting dry air passage 28. FIG. 11 shows a state in which the width of the air passage channel in the first air passage 31 is narrowed by the opposing chevron 333 and chevron 343. The chevron 333 and the chevron 343 respectively have ridges 334 and 344 extending in the intersecting direction, and the air passage 31 is narrowed by the ridges 334 and 344 in the intersecting direction.

  The reason for narrowing the air passage 31 is that water for heat exchange is dripped into the air passage 31 from above, and this water collides with the inner wall narrowed by the mountain shape 333 and the mountain shape 343, and splashed water or This is because fog is generated so that heat exchange can be performed satisfactorily.

  In particular, by making the ridges 334 and 344 face each other in the crossing direction, the inside of the air passage 31 is not too narrow, and the dripping water that hits the mountain shapes 333 and 343 is scattered well and becomes splashed water, Increase heat exchange efficiency.

  As described above, the heat exchange water is supplied to the connection port 336 through the connection hose 81 (see FIG. 5), enters the water supply sections 335 and 345 formed in the air passage 28, and enters the water supply section 335. , 345 is dropped into the first air passage 31. Further, the water overflowing from the water supply sections 335 and 345 is returned to the water storage tank 40 from the connection port 337 through the connection hose 63 (see FIG. 5).

  When water for heat exchange is supplied into the dry air passage 28 using tap water, water for heat exchange is supplied from the water supply hose 62 into the second air passage 32, and the water is the first water. The inside of the air path 31 is dripped.

  As an example, when supplying tap water as water for heat exchange, for example, water of 0.4 liter / min or less is supplied, and the water in the water storage tank 40 is pumped out and supplied as water for heat exchange. In some cases, 2-4 liters / min of water is supplied.

  FIG. 12 is a longitudinal sectional end view of the washing tub 20 and the door 12.

  The rotary drum 24 is provided with a balance ring 111 on the front side (left side in FIG. 12) periphery. The balance ring 111 acts to reduce vibration when the rotary drum 24 is rotated by the DD motor 22. The rotary drum 24 is formed with an inlet ring 112 that protrudes forward from the inner peripheral surface side of the balance ring 111. The tip 113 of the inlet ring 112 forms the inlet of the rotary drum 24.

  A packing 115 is attached to the tip (left side in FIG. 12) 114 of the outer tub 21. The packing 115 is disposed along the tip 114 of the outer tub 21 and has a ring shape when viewed from the front.

  As described above, the main surface of the door 12 is composed of the tempered glass 116, and the entrance / exit of the outer tub 21 and the entrance / exit of the rotary drum 24 are closed inside the tempered glass 116 (the entrance is plugged). ) A molded door glass 117 is attached as a plug.

  In this embodiment, the case where the plug is a transparent molded door glass 117 will be described as an example. However, the plug may be a transparent material other than glass or a non-transparent member. For example, a metal plate (stainless steel) Plate).

  In FIG. 13, the perspective view (The perspective view which looked at the shaping | molding door glass 117 from the back side (inner side of the rotating drum 24)) of the shaping | molding door glass 117 is shown.

  The molded door glass 117 has a substantially disk shape whose circumferential length gradually decreases from the front to the rear. When the door 12 is closed, as shown in FIG. 12, the front peripheral surface portion 118 of the molded door glass 117 is pressed against the packing 115 and closes the entrance / exit of the outer tub 21. The molded door glass 117 has a trunk portion 119 formed so that the circumferential length gradually decreases from the front peripheral portion toward the rear, and the rear end of the trunk portion forms the rear peripheral portion 120. Yes. The rear peripheral surface portion 120 of the molded door glass 117 enters the inside of the entrance / exit 121 formed by the tip 113 of the inlet ring 112 of the rotating drum 24 (inward of the rotating drum 24). Inside the rear peripheral surface portion 120, a surface that covers an area surrounded by the rear peripheral surface portion 120, that is, a rear end surface 122 of the molded door glass 117 is provided.

  Here, the rear peripheral surface portion 120 of the molded door glass 117 enters the inside of the entrance / exit 121 of the rotating drum 24, but the rear end surface 122 is at least centered on the front side of the entrance / exit 121 of the rotating drum 24. Thus, it is a surface curved toward the front so that the center is depressed when viewed from the inside of the rotary drum 24.

  In this embodiment, the volume of the entry space V1 generated by the rear peripheral surface portion 120 entering rearward from the entrance / exit 21 of the rotary drum 24 and the rear end surface 122 of the molded door glass 117 are curved forward. The curved shapes of the rear peripheral surface portion 120 and the rear end surface 122 of the molded door glass 117 are set so that the space V2 that swells ahead of the entrance / exit 121 of the rotating drum 24 has a relationship of V1 ≦ V2.

  With this configuration, the laundry accommodated in the rotary drum 24 can be prevented from coming forward from between the front end 113 of the rotary drum 24 and the rear peripheral surface portion 120 of the molded door glass 117, and the volume in the rotary drum 24 can be increased. It is possible to ensure that the laundry is well stirred in the rotating drum 24.

  The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the claims.

10 Electric Washing Machine 12 Door 20 Washing Tank (Treatment Tank)
21 Outer tank 24 Rotating drum 28 Drying air passage 31 First air passage 33 First part 34 Second part 35 Earth side electrode 36 Detection side electrode 101 Cylindrical circumferential surface 102 Hemispherical surface (curved surface)
103 Cylinder body 112 Entrance ring 117 Molded door glass (plug body)
118 Front peripheral surface portion 119 Body portion 120 Rear peripheral surface portion 121 Entrance / exit 122 (of the rotating drum) Rear end surface

Claims (2)

An outer tub having a substantially cylindrical inner peripheral surface, one end surface of which is a doorway for laundry,
A rotating drum for accommodating the laundry, which is rotatably provided in the outer tub and has one end surface serving as a doorway for the laundry,
A washing tub including an outer tub and a rotating drum;
An openable / closable door provided to close the doorway of the outer tub and the doorway of the rotating drum;
In a drum-type washing machine having
The door has a plug, and the plug is
A front peripheral surface portion facing the entrance and exit of the outer tub, and closing the entrance and exit of the outer tub when the door is closed,
A rear peripheral surface portion that extends rearward from the front peripheral surface portion, and a rear end that has entered the inside of the entrance / exit of the rotating drum;
A rear end surface that closes a region surrounded by the rear peripheral surface portion,
The rear end surface is curved toward the front so that at least the central portion thereof is located in front of the entrance / exit of the rotary drum, and is a surface having a concave at least in the center when viewed from the inside of the rotary drum ,
A drum type washing machine comprising a drain valve for discharging water in a washing tub by opening and closing control, and a filter unit for capturing lint or foreign matter contained in water discharged from the outer tub connected to the drain valve . The plug body is curved forward of the rotating drum from the entrance of the rotating drum rather than the volume of the rear peripheral surface portion entering the entrance of the rotating drum from the entrance of the rotating drum. The drum-type washing machine according to claim 1, wherein an entrance dimension of the rear peripheral surface portion and a curved dimension of the rear end surface are set so that a volume of a space formed in front is larger. .