JP2006262969A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum type washing machine which achieves laundry of an excellent finished state by preventing the adhesion of lint or the like to the laundry. <P>SOLUTION: Washing water between a water tank 2 and a drum 3 flows in a drain duct 28, a filter case 29, a circulating pump 34, and a circulating hose 7 sequentially and returns to the water tank 2 after being discharged from a drain outlet 69 of the water tank 2 to the outside of the water tank 2 by operating the circulating pump 34 during the washing operation and the rinsing operation. A lint filter is disposed in the filter case 29. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drum type washing machine.

  The drum type washing machine has advantages in that the pain of the laundry after washing can be reduced and the amount of water used for washing can be reduced as compared with a fully automatic washing machine (so-called vertical washing machine).

  Conventional drum-type washing machines include those disclosed in Japanese Patent Application Laid-Open No. 2001-113079 (Patent Document 1). In this drum type washing machine, a predetermined amount of water is stored in a water tank, and the drum in the water tank is rotated to wash the laundry in the drum.

  By the way, as the above-mentioned fully automatic washing machine, there is an automatic washing machine in which a lint filter is disposed in a water tank and lint etc. are removed from the washing water in the water tank by a lint filter during washing operation and rinsing operation. The drum type washing machine does not have such a lint filter. This is because in the conventional drum-type washing machine, even if the lint filter is arranged in the water tank, the amount of water stored in the water tank is small, so that the filter cannot remove lint etc. from the water in the water tank. .

Therefore, in the conventional drum-type washing machine, yarn waste and the like cannot be removed from the water in the water tank during the washing operation and the rinsing operation. As a result, there is a problem that after the washing operation and the rinsing operation, lint etc. are adhered to the laundry.
JP 2001-113079 A

  Then, the subject of this invention is providing the drum type washing machine which can prevent the adhesion of the lint etc. to a laundry, and can make the finishing state of a laundry favorable.

In order to solve the above problems, the drum-type washing machine of the present invention is
An outer box,
A water tank disposed in the outer box;
A drum rotatably disposed in the aquarium and containing laundry;
A communication hole provided in the drum for communicating a space between the water tank and the drum and a space in the drum;
A circulation path for circulating the water between the water tank and the drum back into the drum;
A circulation pump provided in the circulation path for circulating water;
And a first filter provided in the circulation path.

  According to the drum type washing machine having the above configuration, the water between the water tank and the drum is circulated through the circulation path. At this time, since the first filter is provided in the circulation path, contaminants (for example, yarn waste) can be removed from the water flowing through the circulation path by the first filter. Therefore, it is possible to prevent the foreign matter from adhering to the laundry and improve the finished state of the laundry.

  Moreover, since impurities can be removed from the circulating water, it is possible to prevent impurities from accumulating at, for example, the drain of the water tank.

  The drum type washing machine of one embodiment includes a metal ion generation unit provided in the circulation path and provided downstream of the first filter.

  According to the drum type washing machine of the above embodiment, since the metal ion generating unit is provided in the circulation path, metal ions can be added to the water flowing in the circulation path. Therefore, by operating the metal ion generating unit while circulating the water between the water tank and the drum through the circulation path, the metal ions can be efficiently and uniformly attached to the laundry.

  Moreover, since the said metal ion generation unit is provided in the downstream of the 1st filter, it can prevent that a foreign material penetrate | invades in a metal ion generation unit. Therefore, failure of the metal ion generation unit due to the above-described contaminants can be prevented.

  The drum type washing machine according to an embodiment includes a drainage path branched from the circulation path on the downstream side of the first filter.

  According to the drum type washing machine of the above-described embodiment, the drainage path branched from the circulation path is provided on the downstream side of the first filter. It can be removed with one filter. That is, the first filter also serves as a circulation filter and a drainage filter.

  In addition, since the first filter also serves as a circulation filter and a drainage filter, it is not necessary to provide a drainage filter separately from the first filter. Accordingly, the number of parts can be reduced and the manufacturing cost can be reduced by the amount of the drainage filter and, for example, the mounting screw related to the drainage filter.

  In addition, the number of maintenance points can be reduced by the amount of the drainage filter, and space can be saved. That is, the effect of improving maintainability by collecting parts can be obtained.

  Moreover, since there is no process of installing the said drainage filter, assembly workability | operativity can be improved.

  In one embodiment, the drum type washing machine includes a filter case that houses the first filter, and the filter case is integrated with the metal ion generation unit.

  According to the drum type washing machine of the said embodiment, since the said filter case is integrated with the metal ion generation unit, assembly workability | operativity can be improved.

  Further, since the filter case is integrated with the metal ion generation unit, for example, a connection hose for connecting the filter case and the metal ion generation unit is unnecessary, and the manufacturing cost can be reduced by the amount of the connection hose.

In the drum type washing machine of one embodiment,
A filter case that houses the first filter;
A maintenance cover rotatably attached to the filter case and having a rotation shaft substantially parallel to the horizontal direction.

  According to the drum type washing machine of the above embodiment, since the maintenance cover has a rotation shaft substantially parallel to the horizontal direction, the maintenance cover is rotated so as to extend from the lower part of the filter case to the outside of the outer box. The maintenance cover can be positioned on the Therefore, when the filter case is opened, the water overflowing from the filter case can be guided out of the outer box by the maintenance cover. That is, the maintenance cover can be used as a water receiver when the first filter is cleaned and replaced.

  The drum type washing machine according to an embodiment includes a second filter provided in the circulation path and detachably supporting the first filter.

  According to the drum type washing machine of the above embodiment, since the first filter can be attached to and detached from the second filter, the first filter can be removed from the second filter and cleaned. Therefore, the cleanability of the first filter can be improved.

  Moreover, even if the first filter is forgotten to be returned to the circulation path after cleaning the first filter, impurities can be removed from the water flowing through the circulation path by the second filter.

In the drum type washing machine of one embodiment,
A filter case that houses the first filter;
An air trap provided integrally with the filter case so as to be separated from the water tank;
A pressure guiding pipe having one end connected to the air trap;
A water level sensor connected to the other end of the pressure guiding pipe and detecting the water level in the water tank.

  According to the drum type washing machine of the said embodiment, since the distance of the said air trap and a water tank is separated, the water level in a water tank can be detected correctly with a water level sensor. That is, the detection error of the water level in the water tank can be reduced.

  Further, since the air trap is provided integrally with the filter case, assembly workability can be improved.

In the drum type washing machine of one embodiment,
On the upper surface of the air trap, a connection port for connecting one end of the pressure guiding pipe is provided,
The connection port protrudes substantially perpendicular to the upper surface of the air trap.

  According to the drum type washing machine of the above embodiment, since the connection port protrudes substantially perpendicular to the upper surface of the air trap, the connection port is brought into contact with the air reservoir in the air trap even if the air trap is inclined. Can do. Therefore, the water level sensor can receive the air pressure in the air trap through the pressure guiding pipe even when the air trap is inclined.

  The drum type washing machine of the present invention circulates the water between the water tank and the drum through the circulation path, and the first filter is provided in the circulation path. It can be removed with this filter. Therefore, it is possible to prevent the foreign matter from adhering to the laundry and improve the finished state of the laundry.

  Moreover, since impurities can be removed from the circulating water, it is possible to prevent impurities from accumulating at, for example, the drain of the water tank.

  Hereinafter, the drum type washing machine of the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1 is a schematic cross-sectional view of a drum type washing and drying machine according to an embodiment of the present invention.

  The drum-type washing / drying machine includes an outer box 1, a bottomed cylindrical water tank 2 disposed in the outer box 1, and a bottomed cylinder that is rotatably disposed in the water tank 2 and stores laundry. A drum 3 having a shape, a drum motor 4 which is attached to the rear part of the water tank 2 and rotationally drives the drum 3, a drying system 5 for drying the laundry, and two dampers 6 which elastically support the rear part of the water tank 2 And has.

  An outer box opening 12 is provided on the front surface of the outer box 1. The outer box opening 12 is opened and closed by a door 13 rotatably attached to the outer box 1. And most of the front part of the said outer case 1 consists of the front panel 14, and the lower part of the outer case 1 is comprised by the base 15. In addition, a detergent case 16 for storing detergent, bleach and softener, and an operation part 17 having operation keys and a display part are provided on the upper part of the outer box 1. A control device 18 for controlling the operation of the drum type washing and drying machine is disposed on the back side of the operation unit 17 (inside the outer box 1).

  In the front panel 14, a maintenance opening 77 is provided in a portion located in front of the filter case 29. A maintenance panel 78 is detachably attached to the maintenance opening 77.

  In the detergent case 16, tap water supplied to the tap water supply port 19 flows in via the tap water supply channel 20, or bath water supplied to the bath water supply port 21 is supplied to the bath water supply water. Or flows in through the path 22. The tap water supply channel 20 is provided with a water supply valve 23. The bath water supply path 22 is provided with a bath water pump 24.

  A water tank opening 25 is provided on the front surface of the water tank 2. A packing 26 made of an elastic material such as rubber or soft resin is fixed to the opening edge of the water tank opening 25. As a result, when the door 13 is closed, the door 13 comes into close contact with the packing 26, so that the liquid in the water tank 2 can be prevented from leaking out of the water tank 2. Further, the water tank 2 is disposed sideways so that the water tank opening 25 faces the outer box opening 12. More specifically, the central axis of the water tank 2 is inclined so as to form an angle of 5 ° to 30 ° with respect to the horizontal direction. A water supply duct 27 is connected to the upper part of the water tank 2, and washing water (tap water containing detergent or the like or simple tap water) is supplied from the water supply duct 27 into the water tank 2. On the other hand, a drain port 69 for draining the washing liquid in the water tank 2 to the outside is provided in the lower part of the water tank 2. The drain port 69 is connected to the upper end of the drain duct 28.

  The liquid that has flowed through the drainage duct 28 passes through the filter case 29 and then flows through a drainage hose 30 as an example of a drainage path and goes out of the outer box 1 or flows through the circulation hose 7 into the water tank 2. Return.

  A circulation nozzle 8 for injecting water into the drum 3 is connected to the upper end portion of the circulation hose 7, while a lower end portion of the circulation hose 7 is connected to a circulation pump 34 located behind the filter case 29. Has been. The circulation hose 7 and the drainage duct 28 constitute an example of a circulation path.

  A drain valve 33 is attached to the end of the drain hose 30 near the filter case 29. The drain valve 33 is opened and closed by a drain motor 32.

  The rotation axis of the drum 3 is inclined so as to form an angle of 5 ° to 30 ° with respect to the horizontal direction. A drum opening 36 facing the outer box opening 12 and the water tank opening 25 is provided on the front surface of the drum 3. The drum opening 36 has a larger diameter than the water tank opening 25. A plurality of small holes 37 are provided in the entire peripheral wall of the drum 3. The small holes 37 are for circulating wash water, dry air, and the like between the space between the water tank 2 and the drum 3 and the space in the drum 3. Further, a baffle 38 that protrudes inward in the radial direction is provided on the inner wall surface of the drum 3. The baffles 38 are arranged at three locations in the circumferential direction, for example, at intervals of 120 °, and repeat the lifting and dropping of the laundry as the drum 3 rotates. Further, a liquid balancer 39 is provided to surround the drum opening 36 of the drum 3 from the outside, and an imbalance that is likely to occur due to bias of laundry, washing liquid, etc. when the drum 3 rotates is caused inside the liquid balancer 39. The movement is canceled by the movement of the sealed liquid. The small hole 37 is an example of a communication hole.

  The drying system 5 includes a fan unit 40 and a hot air unit 42. Although not shown, the drying system 5 also has a heat exchange plate for dehumidification.

  The dehumidifying heat exchange plate is disposed between the lower part of the water tank 2 and the lower part of the drum 3. The dehumidifying heat exchange plate is cooled with cooling water during operation of the drying system 5, that is, during a drying operation. The air containing moisture evaporated from the laundry is brought into contact with the cooled dehumidifying heat exchange plate to condense the moisture of the air, thereby dehumidifying the air.

  The fan unit 40 is attached to the lower part of the rear surface of the water tank 2. The fan unit 40 includes a fan case 43 into which air dehumidified by the heat exchange plate for dehumidification enters, a blower fan 44 accommodated in the fan case 43, and a fan motor that rotationally drives the blower fan 44. 45. The fan motor 45 is directly connected to the blower fan 44, and rotates the blower fan 44 by a direct drive structure.

  The warm air unit 42 includes a drying heater 47, a drying heater case 48 that accommodates most of the drying heater 47, and a blower case 49 that guides the air heated by the drying heater 47 into the drum 3. It consists of.

  The drying heater 47 is installed between the lower part of the water tank 2 and the lower part of the drum 3 so as to be located on the side of the heat exchange plate for dehumidification, and heats the blown air from the fan unit 40. That is, the air dehumidified by the heat exchange plate for dehumidification is sent to the drying heater 47 by the fan unit 40 and is heated by the drying heater 47.

  The air outlet (not shown) of the air blowing case 49 is located between the lower edge of the water tank opening 25 and the lower edge of the drum opening 36. As a result, the air guided by the blower case 49 is blown out from the blowout port into the drum 3.

  FIG. 2A shows a schematic view of the filter case 29 and its peripheral portion as viewed from above. 2A, the drainage duct 28, a maintenance cover 62, a pressure guide pipe 68, and a water level sensor 71, which will be described later, are not shown.

  The filter case 29 is integrally provided with an air trap 61 and a circulation pump 34. The space in the filter case 29 communicates with the space in the air trap 61 so that part of the water that has entered the filter case 29 enters the air trap 61.

  The circulation pump 34 has a pump chamber 72 located behind the filter case 29 and a pump motor 73 that sends the liquid in the pump chamber 72 to the circulation hose 7. The space in the pump chamber 72 communicates with the space in the filter case 29 via the connection hose 63.

  FIG. 2B shows a schematic view of the filter case 29 and its peripheral portion as viewed from the side. The connection hose 63 is shown in cross section.

  A maintenance cover 62 is rotatably attached to the front portion (portion on the front panel 14 side) of the filter case 29. The rotation axis of the maintenance cover 62 is substantially parallel to the horizontal direction, and the maintenance cover 62 rotates in the vertical direction around the lower portion of the filter case 29.

  The pump chamber 72 is provided with a suction port 74 and a discharge port 75. The suction port 74 is connected to the upper end portion of the connection hose 63 and the connection hose 63. The discharge port 74 is connected to the lower end portion of the circulation hose 7. Has been.

  FIG. 2C shows a schematic view of the filter case 29 and its peripheral portion as viewed from the front. Note that the filter case 29 and a part of the periphery thereof are shown in cross section.

  The filter case 29 has an inlet 64, a first outlet 65, and a second outlet 66. The inflow port 64 is connected to the lower end portion of the drainage duct 28. Further, the lower end portion of the connection hose 63 is connected to the first outlet 65 so that the liquid discharged from the first outlet 65 flows through the connection hose 63, the pump chamber 72 and the circulation hose 7 sequentially. (See FIG. 2B). Further, one end of the drainage hose 30 is connected to the second outlet 66 so that the liquid discharged from the first outlet 65 flows out of the outer box 1 through the drainage hose 30. It has become.

  The air trap 61 is separated by a distance approximately equal to the height difference between the upper end of the first outlet 65 and the lower end of the water tank 2. That is, the distance between the upper surface of the air trap 61 and the lower end of the water tank 2 is substantially equal to the distance between the upper end of the first outlet 65 and the lower end of the water tank 2. More specifically, the upper surface of the air trap 61 is located below the lower end of the water tank 2, while the lower surface of the air trap 61 is located above the upper ends of the first and second outlets 65 and 66. ing. Further, a cylindrical connection port 70 substantially perpendicular to the upper surface is provided on the upper surface of the air trap 61. A water level sensor 71 is connected to the connection port 70 via a pressure guiding pipe 68.

  The water level sensor 23 has a coil and a magnetic body therein, and the magnetic body moves in the coil in accordance with a change in air pressure in the air trap 61. The water level sensor 23 detects the coil inductance generated by the position of the magnetic body in the coil as an oscillation frequency, and detects the water level in the water tank 4 based on the oscillation frequency.

  FIG. 3 is a schematic cross-sectional view of the filter case 29 and its peripheral part.

  As shown in FIGS. 2C and 3, a resin or metal lint filter 31 and a resin support frame 76 that removably supports the lint filter 31 are accommodated in the filter case 29. Yes. The eyes of the support frame 76 are rougher than the eyes of the lint filter 31. The support frame 76 can be taken out from the filter case 29 together with the lint filter 31, as shown in FIG. The lint filter 31 is an example of a first filter, and the support frame 76 is an example of a second filter.

  According to the drum type washing / drying machine having the above-described configuration, the circulation pump 34 is operated with the drain valve 33 being closed during the washing operation and the rinsing operation. Thereby, as shown in FIG. 1, the washing water between the water tank 2 and the drum 3 comes out of the water tank 2 from the drain port 69 of the water tank 2, and then the drain duct 28, the filter case 29, and the circulation pump 34. And it flows through the circulation hose 7 sequentially. Then, washing water is ejected from the circulation nozzle 8 connected to the upper end of the circulation hose 7 into the drum 3. Thereby, since the said wash water falls on the laundry in the drum 4, even if there is little quantity of the wash water stored in the water tank 2, while being able to improve a washing effect, the rinse effect can be heightened.

  Further, since the washing water between the water tank 2 and the drum 3 circulates through the filter case 29, foreign matters such as yarn waste mixed with the washing water are captured by the lint filter 31. Therefore, it is possible to prevent the foreign matter from adhering to the laundry and improve the finished state of the laundry.

  Moreover, since foreign substances can be removed from the washing water, it is possible to prevent foreign substances from accumulating in the drainage port 69 of the water tank 2.

  Also, when the washing water is drained outside the outer box 1, the washing water passes through the lint filter 31 in the filter case 29. That is, the lint filter 31 serves as a circulation filter and a drainage filter. Therefore, it is not necessary to provide a drainage filter separately from the lint filter 31, and the number of parts can be reduced and the manufacturing cost can be reduced by not using the drainage filter and, for example, mounting screws related thereto.

  In addition, the number of maintenance points can be reduced by the amount of the drainage filter, and space can be saved. That is, the effect of improving maintainability by collecting parts can be obtained.

  Moreover, since the process of installing the said drainage filter is not required, assembly workability | operativity can be improved.

  For example, when cleaning the lint filter 31, the maintenance panel 78 is removed from the maintenance opening 77, and the maintenance cover 62 is rotated to a position indicated by a two-dot chain line. Then, as shown in FIG. 4, the support frame 76 is taken out from the filter case 29 together with the lint filter 31, and the lint filter 31 is separated from the support frame 76 and cleaned. Therefore, the support frame 76 can be easily cleaned.

  Further, when the support frame 76 is taken out from the filter case 29 together with the lint filter 31, the maintenance cover 62 is located at a position indicated by a two-dot chain line in FIG. 1, so that water overflowing from the filter case 29 is 1 Guided outside. Therefore. If, for example, a wash basin is placed under the end of the maintenance cover 62 protruding from the outer box 1, the floor in front of the outer box 1 can be prevented from being flooded.

  Even if the lint filter 31 is forgotten to be mounted on the support frame 76 after the lint filter 31 is cleaned and only the support frame 76 is returned to the filter case 29, for example, coins and keys can be captured by the support frame 76. Accordingly, since the coins and keys can be prevented from entering the drain valve 33, the drain valve 33 can be prevented from being broken.

  Further, since the support frame 76 is made of resin, it is less likely to be damaged than the lint filter 31.

  During the washing operation and the rinsing operation, the water level sensor 71 detects the water level in the water tank 2 based on the air pressure in the air trap 61. Since the air trap 61 is separated from the water tank 2, the water level sensor 71 can accurately detect the water level in the water tank 2 with the water level sensor. That is, the detection error of the water level in the water tank 2 can be reduced.

  Further, since the air trap 61 is provided integrally with the filter case 29, assembly workability can be improved.

  Further, since the connection port 70 of the air trap 61 protrudes substantially perpendicular to the upper surface of the air trap 61, the connection port 70 can be brought into contact with the air reservoir in the air trap 61 even if the air trap 61 is inclined. it can. Therefore, the water level sensor 71 can accurately detect the air pressure in the air trap 61 via the pressure guiding pipe 68 even if the air trap 61 is inclined.

  In the above embodiment, the air trap 61 and the circulation pump 34 are integrally provided in the filter case 29. However, as shown in FIGS. 5 to 8, as an example of the air trap 61, the circulation pump 34, and the metal ion generation unit. The silver ion generation unit 79 may be provided integrally with the filter case 29.

  As shown in FIGS. 6 and 7, the silver ion generation unit 79 has a silver metal plate 82 inside and generates silver ions to be attached to the laundry. The inlet 80 of the silver ion generation unit 79 is connected to the first outlet 65 of the filter case 29, and the outlet 81 of the silver ion generation unit 79 is connected to the pump chamber 72 of the circulation pump 34. As a result, the silver ion generation unit 79 can add silver ions to the wash water from the first outlet 65 toward the pump chamber 72. That is, the silver ion generation unit 79 can add silver ions to the circulating washing water. As a result, the silver ions can be efficiently and uniformly attached to the laundry.

  Further, since the silver ion generation unit 79 is provided on the downstream side of the lint filter 31, it is possible to prevent impurities from entering the silver ion generation unit 79. Therefore, failure of the silver ion generation unit 79 due to the impurities can be prevented.

  Further, since the silver ion generation unit 79 is integrated with the filter case 29, the assembling workability can be improved and, for example, a connecting hose for connecting the filter case 29 and the silver ion generation unit 79 is required. Therefore, the manufacturing cost can be reduced by the amount of the connecting hose.

  5 to 8, the same reference numerals as those in FIGS. 2A to 2C are assigned to the same components as those illustrated in FIGS. 2A to 2C. 7 and 8 show a part of the components in cross section.

  In the above embodiment, the air trap 61 and the circulation pump 34 are integrally provided in the filter case 29. However, the copper ion generation unit as an example of the air trap 61, the circulation pump 34, and the metal ion generation unit is used as the filter case. 29 may be provided integrally. This copper ion generation unit has the same configuration as the silver ion generation unit 79 except that it has a copper metal plate 82.

  In the above embodiment, the air trap 61 and the circulation pump 34 are integrally provided in the filter case 29. However, a silver / copper ion generation unit as an example of the air trap 61, the circulation pump 34, and the metal ion generation unit is provided. The filter case 29 may be integrally provided. This copper ion generation unit has the same configuration as the silver ion generation unit 79 except that it has a copper metal plate and a silver metal plate.

  In the above embodiment, the support frame 76 having a coarser mesh than the lint filter 31 is used, but a resin mesh filter having a finer mesh than the lint filter 31 is used as an example of the second filter. Also good. That is, instead of installing the support frame 76 in the filter case 29 as an example of the second filter, a resin mesh filter having a finer mesh than the lint filter 31 is used in the filter case 29 as an example of the second filter. You may install in.

  Moreover, in the said embodiment, although the bath water pump 24 was provided in the water supply path 22 for bath water, you may provide a water supply valve instead of the bath water pump 24. FIG.

  The present invention can be applied not only to a drum type washing machine having a drying function but also to a drum type washing machine having no drying function.

FIG. 1 is a schematic cross-sectional view of a drum type laundry dryer according to an embodiment of the present invention. FIG. 2A is a schematic view of the filter case of the drum type washing and drying machine and its peripheral portion as viewed from above. FIG. 2B is a schematic view of the filter case and the periphery thereof as seen from the side. FIG. 2C is a schematic view of the filter case and its peripheral portion as viewed from the front. FIG. 3 is a schematic cross-sectional view of the filter case and the periphery thereof. FIG. 4 is a schematic view for explaining the removal of the support frame and the lint filter from the filter case. FIG. 5 is a schematic view of a modified example of the filter case and the periphery thereof as seen from the side. FIG. 6 is a schematic view of a modified example of the filter case and its peripheral portion as viewed from above. FIG. 7 is a schematic view of a modified example of the filter case and its peripheral portion as viewed from the side. FIG. 8 is a schematic view of a modified example of the filter case and its peripheral portion as viewed from above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer box 2 Water tank 3 Drum 7 Circulation hose 28 Drain duct 31 Lint filter 34 Circulation pump 37 Small hole 62 Maintenance cover 29 Filter case 30 Drain hose 62 Maintenance cover 76 Support frame 79 Silver ion generation unit

Claims (8)

An outer box,
A water tank disposed in the outer box;
A drum rotatably disposed in the aquarium and containing laundry;
A communication hole provided in the drum for communicating a space between the water tank and the drum and a space in the drum;
A circulation path for circulating the water between the water tank and the drum back into the drum;
A circulation pump provided in the circulation path for circulating water;
A drum-type washing machine comprising a first filter provided in the circulation path. In the drum type washing machine according to claim 1,
A drum-type washing machine comprising a metal ion generating unit provided in the circulation path and provided downstream of the first filter. In the drum type washing machine according to claim 1,
A drum-type washing machine comprising a drainage path branched from the circulation path on the downstream side of the first filter. In the drum type washing machine according to claim 2,
A filter case for housing the first filter;
The drum type washing machine, wherein the filter case is integrated with the metal ion generating unit. In the drum type washing machine according to claim 1,
A filter case that houses the first filter;
A drum type washing machine comprising: a maintenance cover rotatably attached to the filter case and having a rotation shaft substantially parallel to a horizontal direction. In the drum type washing machine according to claim 1,
A drum-type washing machine comprising a second filter provided in the circulation path and detachably supporting the first filter. In the drum type washing machine according to claim 1,
A filter case that houses the first filter;
An air trap provided integrally with the filter case so as to be separated from the water tank;
A pressure guiding pipe having one end connected to the air trap;
A drum type washing machine comprising: a water level sensor connected to the other end of the pressure guiding pipe and detecting a water level in the water tank. In the drum type washing machine according to claim 7,
On the upper surface of the air trap, a connection port for connecting one end of the pressure guiding pipe is provided,
The drum-type washing machine, wherein the connection port protrudes substantially perpendicular to the upper surface of the air trap.

Images