JP2009050453A - Drain pump for washing and drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drain pump for washing and drying machine with a good waterproofness of a motor. <P>SOLUTION: A washing and drying machine is provided with a heat pump unit for drying clothes. The heat pump unit is equipped with an evaporator and discharges water generated by dew condensation on the evaporator while clothes are being dried to outside the washing and drying machine by a drain pump 60. The drain pump 60 is provided with an impeller 76 that includes a driven magnet 82 and a pump motor 63 that rotates the impeller 76 by the magnetic attraction by rotating a driving magnet 65. A partitioning panel 75 is installed between an impeller housing 66 and a motor housing 77 to seclude the interior of the impeller housing 77 form the interior of the motor housing 66. Also, a seal packing 86 is inserted between the motor housing 66 and the partitioning panel 75 to liquid-tightly uniting the partitioning panel 75 and the motor housing 66. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drain pump for a washing and drying machine that is attached to a washing and drying machine having a heat pump for drying clothes and discharges moisture adhering to an evaporator constituting the heat pump to the outside.

  2. Description of the Related Art A washing / drying machine that stores wet clothes after washing in a drying room and supplies warm air to the drying room by a heat pump to dry the clothes has been put to practical use (see, for example, Patent Document 1). The heat pump is equipped with a compressor together with an evaporator and a condenser. The air containing moisture after drying the clothes is dried by the evaporator, and the refrigerant whose temperature has risen by passing through the evaporator is further reduced by the compressor. After heating, the air for drying is led to a condenser to heat the drying air. Thereby, the washing dryer using the heat pump can be reused without losing most of the energy, and can dry clothes with high heat efficiency.

  By the way, in a washing and drying machine using a heat pump, condensation occurs in the evaporator during the drying process, and drops as water drops due to an increase in the amount. These water droplets are temporarily stored in a drainage tank and then discharged to the outside of the washing and drying machine by a drain pump. Here, the heat pump unit itself is generally a heavy object and is usually attached so as to be positioned below the water tank. And the drain pump which discharges | emits the water droplet which fell from the evaporator needs to be provided in a lower position from a function top, and is often attached to the lowest part of a washing-drying machine.

  In general households, the outlet of the hose drawn out from the main body of the washing and drying machine to discharge the water in the aquarium is a sewage outlet formed on the floor of the house so that the drainage can be smoothly discharged outdoors. It is placed near. Therefore, in many cases, the waste water from the hose flows into the sewer as it is. However, when there is a large amount of drainage from the hose, the drainage is accumulated for a while at the place where the washing and drying machine is installed. In particular, if the installation location of the washing and drying machine is small due to housing conditions, the accumulated drainage may become quite high. In such a case, the drain pump attached to the lower part of the washing and drying machine It is thought enough to immerse in.

On the other hand, a drain pump used in a washing / drying machine generally uses an electric motor to drive an impeller that sucks waste water, and a waterproof measure for the electric motor is required. As a conventional technique related to a self-priming pump subjected to waterproof treatment, there is one in which a seal member is disposed between an upper portion of an impeller driven by an electric motor and a bearing portion (see, for example, Patent Document 2). . Since this conventional pump has a structure for sealing an impeller, which is a submerged rotating body, it is difficult to completely prevent water from entering the electric motor. Further, due to the deterioration of the seal member due to the sliding of the impeller and the seal member, it is very difficult to ensure the seal performance for a long time use.
JP 2006-345919 A JP 2001-90685 A

  This invention is made | formed in view of the said situation, The objective is to provide the drain pump for washing-drying machines excellent in the waterproofness of the motor.

  In order to achieve the above object, in the drain pump for a washing and drying machine according to the present invention, warm air is supplied to the drying chamber provided in the circulation path and containing wet clothes after washing through the circulation path. The clothes are dried by supplying the air, and after passing through the drying chamber, the moisture-containing air is dried and heated by the evaporator and the condenser provided in the circulation path, respectively, and then the drying is performed again. A washing / drying machine which is attached to a washing / drying machine having a hot air circulation device for supplying to a room and a drainage tank for storing moisture adhering to the evaporator when air passes, and which drains the moisture in the drainage tank to the outside A drain pump for rotating an impeller including a first magnet for sucking moisture in the drainage tank, an impeller housing for rotatably accommodating the impeller, and a drive shaft. A motor that drives the impeller by a magnetic force generated between the second magnet and the first magnet, a motor housing that houses the motor, the impeller housing, A partition plate interposed between the motor housing and blocking the interior of the impeller housing and the interior of the motor housing from each other; a first seal member inserted between the impeller housing and the partition plate; The second seal member inserted between the motor housing and the partition plate, and the impeller housing and the motor housing are fastened to each other, whereby the first seal member and the first seal member are interposed between the partition plate and the second seal member. 2 Press the seal member, between the partition plate and the impeller housing, and between the partition plate and the motor housing. Between ring, characterized in that it comprises a fastening means for each liquid-tight joined.

  According to the above means, the motor and the impeller have a non-connected structure, and the motor can be completely shielded from moisture in the impeller housing by the partition plate and the first seal member. By the second seal member inserted between them, the motor can be reliably isolated from the drainage outside the drain pump stored below the washing / drying machine, and the waterproof function at the junction between the motor housing and the partition plate can be improved. . In addition, since the first seal member and the second seal member are fixed seals, even when the drain pump is used for a long time, there is no deterioration of the seal member due to sliding, and the deterioration of the waterproofness of the motor is prevented. Can do.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 shows the overall configuration of a drum-type (horizontal axis) washing and drying machine 10 to which a drain pump 60 according to the present embodiment is attached. The washing / drying machine 10 includes a casing 11, a rotating tub 12, a motor 13, a case 20, a heat pump unit 40, a drain pump 60, and the like. The casing 11 forms an outline of the washing / drying machine. The casing 11 has a water tank 14 formed therein. Inside the water tank 14, a rotating tank 12 (corresponding to the drying chamber of the present invention) is accommodated. Both the water tank 14 and the rotating tank 12 are formed in a cylindrical shape whose front side is open. The end of the water tub 14 on the open side is connected by a bellows 16 to an opening 15 for taking in and out the laundry formed on the front end side of the housing 11. A door 17 is provided at the opening 15 for taking in and out the laundry formed in the housing 11 so as to be openable and closable. The rotating tub 12 accommodated in the water tub 14 becomes a washing room when washing, and becomes a drying room when drying.

  A water supply case 50 is provided on the inner side above the housing 11. A water supply valve 51 is built in the water supply case 50. The water supply valve 51 is connected to a water tap through a hose. Thereby, tap water is supplied to the water tank 14 at the time of washing. The rotating tub 12 has a hole 18 almost entirely in the cylindrical body portion. The hole 18 functions as a hole for passing water and also functions as a hole for ventilation. The water supplied from the water supply valve 51 is supplied into the rotary tank 12 through these holes 18. The water tank 14 has a drain port 19 at the end on the case 20 side. A drain hose is connected to the drain port 19. The drain hose has an end opposite to the drain port 19 taken out of the washing / drying machine 10.

  The rotating tank 12 is provided with a rotating shaft 57 at the center on the rear end side. The rotating shaft 57 protrudes further rearward from the rear end of the rotating tub 12. The motor 13 is attached to the end of the projecting rotating shaft 57. The motor 13 is a three-phase brushless DC motor. As a result, the motor 13 rotationally drives the rotating tub 12 around the rotating shaft 57. The water tank 14 is provided with a hot air outlet 52 above the opening on the front end side. Further, the water tank 14 is provided with a hot air inlet 53 on the upper side on the rear end side. The hot air outlet 52 and the hot air inlet 53 are connected by a ventilation path 54 (corresponding to the circulation path of the present invention).

  The washing / drying machine 10 has a case 20 at the bottom of the housing 11. The case 20 may be formed integrally with the housing 11 or may be formed separately from the housing 11. Further, the case 20 may be housed inside the housing 11 on the bottom side of the housing 11 constituted by an integral or separate member. The case 20 is equipped with a heat pump unit 40 (corresponding to the hot air circulation device of the present invention).

  A ventilation path 54 is formed between the water tank 14 and the heat pump unit 40. A blower fan 55 is provided in the middle of the ventilation path 54. The blower fan 55 blows air to the heat pump unit 40 provided in the case 20. Thereby, the air sucked from the water tank 14 is supplied again to the water tank 14 via the heat pump unit 40 by the blower fan 55.

  As shown in FIG. 2, the heat pump unit 40 includes a compressor 41, a condenser 42, an evaporator 43, a throttle 44, and a piping member 45. The piping member 45 forms a refrigerant passage from the compressor 41 to the compressor 41 through the condenser 42, the throttle 44 and the evaporator 43 in order. The refrigerant compressed by the compressor 41 is radiated by the condenser 42, then the pressure is released by the throttle 44, and then returns to the compressor 41 again via the evaporator 43. The compressor 41 compresses the refrigerant flowing through the piping member 45. The condenser 42 (corresponding to the condenser of the present invention) passes through the refrigerant that has been compressed by the compressor 41 and whose temperature has risen. As the refrigerant passes through the condenser 42, the refrigerant dissipates heat, while the air passing through the condenser 42 is heated. The restrictor 44 releases the pressure of the compressed refrigerant. Refrigerant whose pressure is released by the throttle 44 flows into the evaporator 43 (corresponding to the evaporator of the present invention). When the pressure is released and the refrigerant is vaporized, the evaporator 43 is cooled by the heat of evaporation during vaporization. As a result, the air passing through the evaporator 43 is cooled.

  The air supplied from the water tank 14 to the heat pump unit 40 by the blower fan 55 first passes through the evaporator 43. Since the air passing through the evaporator 43 is cooled, the water vapor contained in the air is condensed in the evaporator 43. Thereby, the water | moisture content in the air supplied to the heat pump unit 40 is removed, and the humidity of air falls. The air that has passed through the evaporator 43 subsequently passes through the condenser 42. In the condenser 42, the air from which moisture has been removed by the evaporator 43 is heated. As a result, in the heat pump unit 40, the air dried by the evaporator 43 is heated by the condenser 42. And the air (warm air) dried and heated by passing the heat pump unit 40 is supplied to the water tank 14 (rotary tank 12) through the ventilation path 54. The air supplied to the water tub 14 passes through the rotating tub 12 to absorb moisture contained in the laundry, and then circulates again to the heat pump unit 40 through the ventilation path 54 and is dried by the evaporator 43 and the condenser 42. After being heated, it is supplied again to the water tank 14 (rotating tank 12). Thereby, the wet clothes after washing accommodated in the rotating tub 12 are dried.

  The case 20 has a bottom plate 21 and a wall 22 rising from the bottom plate 21 to the water tank 14 side. The wall 22 is generally continuous along the outer edge of the case 20 and forms a space partitioned inside. The case 20 has a partition wall 23 that partitions the space inside the wall 22 inside the wall 22. The partition wall 23 divides the storage chamber 24 and the piping storage chamber 25 in the case 20.

  The case 20 is provided with a compressor 41, a throttle 44, and most piping members 45 outside the wall 22. That is, the compressor 41 is provided on one end side (the right side in FIG. 2) of the case 20 outside the wall 22. Further, on the same end side as the compressor 41, a throttle 44 and most of the piping members 45 are provided. The compressor 41 and the piping member 45 connecting the compressor 41 and the condenser 42 become high temperature because the refrigerant compressed by the compressor 41 flows. On the other hand, the piping member 45 connecting the throttle 44 and the evaporator 43 becomes low temperature because the refrigerant whose pressure is released by the throttle 44 flows. As described above, the members on the compressor 41 side of the case 20 form a large temperature difference therebetween.

  The condenser 42 and the evaporator 43 of the heat pump unit 40 are accommodated in the accommodation chamber 24. The condenser 42 and the evaporator 43 are arranged such that the longitudinal direction thereof extends from the wall 22 on the compressor 41 side toward the partition wall 23 on the opposite side of the compressor 41. The capacitor 42 and the evaporator 43 are provided substantially in parallel. The air circulated by the blower fan 55 flows substantially perpendicular to the longitudinal direction of the condenser 42 and the evaporator 43, that is, from the lower (front) side to the upper (rear) side in FIG.

  The piping member 45 has a folded portion 26 that is folded at the end of the condenser 42 opposite to the compressor 41. Further, the piping member 45 has a folded portion 27 that is folded at an end portion of the evaporator 43 opposite to the compressor 41. Each of the folded portion 26 and the folded portion 27 protrudes from the capacitor 42 or the evaporator 43 to the side opposite to the compressor 41. The folded portion 26 projecting from the capacitor 42 and the folded portion 27 projecting from the evaporator 43 are both housed in a pipe housing chamber 25 formed in the case 20. That is, the condenser 42 and the evaporator 43 are accommodated in the accommodation chamber 24, while the folded portion 26 and the folded portion 27 located on the opposite side of the compressor 41 in the piping member 45 are accommodated in the piping accommodation chamber 25. Yes.

  The case 20 further has a pump housing 30 as shown in FIGS. The pump housing portion 30 is formed to be recessed from the wall 22 on the opposite side to the compressor 41 to the partition wall 23 side. That is, the pump housing portion 30 is formed to be recessed from the end of the pipe housing chamber 25 on the side opposite to the compressor 41 to the housing chamber 24 side. The pump housing portion 30 is provided in the pipe housing chamber 25 between the capacitor 42 and the evaporator 43. Thereby, the pump housing part 30 and the pipe housing chamber 25 are partitioned by the forming wall 31. Furthermore, as shown in FIG. 3, the pump housing portion 30 is formed to be recessed from the bottom plate 21 side of the case 20 to the water tank 14 side.

  The temperature difference between the capacitor 42 and the evaporator 43 is large. Further, when air passes, condensed water adheres to the evaporator 43 as water droplets, and water for cooling may be sprayed on the condenser 42. At this time, if unnecessary water adheres to the evaporator 43, it causes a decrease in performance. Therefore, a predetermined distance is ensured between the capacitor 42 and the evaporator 43 in order to reduce the influence of heat and water between each other.

  A drain pump 60 is accommodated in the pump accommodating portion 30. The drain pump 60 has a mounting portion 61 and a water inlet 62. As shown in FIG. 3, the drain pump 60 is connected through a water inlet 62 to a drain tank 32 provided on the side of the bottom plate 21 of the case 20 opposite to the water tank 14. The water condensed by the evaporator 43 and the water sprayed on the condenser 42 flow into the drainage tank 32 as water that is no longer needed by the heat pump unit 40. The inflowing water is stored in the drain tank 32 and then discharged to the outside of the washing and drying machine 10 by the drain pump 60 through the discharge hose 58 at a predetermined time. In addition, the bottom plate 21 of the case 20 is provided with a drain port 33 that allows the storage chamber 24 formed inside the case 20 and the drain tank 32 to communicate with each other (shown in FIG. 2).

  The drain pump 60 has a mounting portion 61. In the case of this embodiment, the attachment portion 61 extends in the flow direction of the air circulated from the drain pump 60, that is, the vertical direction in FIG. The drain pump 60 is attached to the case 20 by the attachment portion 61. A gap is formed between the drain pump 60 and the case 20 except for the mounting portion 61. That is, the drain pump 60 forms a predetermined distance between the bottom plate 21 forming the case 20 and the wall 22 at a portion other than the attachment portion 61 and is not in direct contact with the case 20. As a result, the drain pump 60 has a so-called floating floor structure. In this way, by forming a gap between the drain pump 60 and the case 20, the formation wall 31 and the condenser 42, the evaporator 43, the folded portions 26 and 27 of the piping member 45, and the drain pump 60 are provided. An air layer is formed.

  Next, details of the drain pump 60 according to the present embodiment will be described with reference to FIGS. 4 and 5. In addition, the up-down direction of FIG. 5 corresponds with the attachment state (attachment direction) to the washing / drying machine 10 of the drain pump 60. The drain pump 60 according to the present embodiment has a non-connected structure between the pump motor 63 and the impeller 76, and is called a magnet coupling that transmits the rotational force of the pump motor 63 to the impeller 76 by the magnetic force generated between the two. The structure is applied. A pump motor 63 (corresponding to the motor of the present invention) of the drain pump 60 has a drive shaft 64 extending downward, and a multipolar drive magnet 65 (first of the present invention is provided at the lower end of the drive shaft 64). 2 (corresponding to two magnets) is fitted and fixed in a central through hole (no symbol).

  The motor housing 66 that houses the pump motor 63 is formed of a synthetic resin material and has a cylindrical shape with open upper and lower ends. On the outer peripheral surface of the motor housing 66, the above-described pair of mounting portions 61 are provided by integral molding. The motor housing 66 has a flange portion 67 projecting inward in the radial direction, and the pump motor 63 is fixed to the upper surface of the motor housing 66 by mounting bolts 68. Further, a power supply harness 69 (corresponding to the electrical harness of the present invention) is connected to the upper end surface of the pump motor 63, and the harness 69 is pulled out from the upper end portion of the motor housing 66, A connector 70 is attached to the end. As shown in FIG. 5, the harness 69 is above a junction between a motor housing 66 and a partition plate 75 described later, so that the harness 69 is immersed in the drainage stored below the washing / drying machine 10 without performing any special waterproofing treatment. There is nothing.

  A cup-shaped cap 71 is attached to the motor housing 66, whereby the opening at the upper end of the motor housing 66 is closed. The cap 71 is formed of a synthetic resin material, and is fixed by engaging a pair of snap portions 72 (shown in FIG. 4) provided on the outer peripheral surface with a hook 73 of the motor housing 66. A harness guide 74 protrudes from one place on the outer peripheral surface of the cap 71, and the harness guide 74 covers the harness 69 pulled out from the motor housing 66 by attaching the cap 71 to the motor housing 66. .

A partition plate 75 that is formed of a synthetic resin material in a flat plate shape is disposed on the lower end surface of the motor housing 66, and an impeller housing 77 that houses the impeller 76 is joined to the lower side of the partition plate 75. That is, the partition plate 75 is interposed between the motor housing 66 and the impeller housing 77, and blocks the interior of the motor housing 66 from the interior of the impeller housing 77. A pivot shaft 78 is press-fitted and fixed to the lower surface of the partition plate 75, and the pivot shaft 78 extends into the impeller housing 77.
The impeller housing 77 is made of a synthetic resin material, and includes the water inlet 62 described above and a water outlet 79 (shown in FIG. 4). The discharge hose 58 described above is connected to the water outlet 79 (shown in FIG. 3). The impeller housing 77 is formed in a cup shape so as to accommodate the impeller 76, and a support portion 80 projects upward from the floor surface inside the impeller housing 77.

  The impeller 76 housed in the impeller housing 77 has a plurality of blades 81 and a rotation formed of a synthetic resin material so as to include a multipolar driven magnet 82 (corresponding to the first magnet of the present invention). A part 83 and a shaft part 84 attached to the center of rotation are formed. The shaft portion 84 is formed of a hard resin material, and a long hole (not shown) that fits with the pivot shaft 78 of the partition plate 75 described above is opened above the shaft portion 84. In a state where the impeller housing 77 in which the impeller 76 is accommodated is joined to the motor housing 66 via the partition plate 75, a pivot shaft 78 protruding from the partition plate 75 is inserted into the elongated hole of the impeller 76 so as to be relatively rotatable. Has been. Further, the lower end of the shaft portion 84 is supported by the support portion 80 of the impeller housing 77, whereby the impeller 76 is accommodated in the impeller housing 77 so as to be rotatable without being vertically vibrated.

  A seal ring 85 (corresponding to the first seal member of the present invention) is inserted between the impeller housing 77 and the partition plate 75. A seal packing 86 (corresponding to the second seal member of the present invention) is inserted between the motor housing 66 and the partition plate 75. The seal ring 85 is formed of a synthetic rubber material so as to surround the upper opening of the impeller housing 77 and has a circular shape in cross section and is formed in an annular shape as a whole. Further, the seal packing 86 is formed of a synthetic rubber material so as to surround the lower end opening of the motor housing 66, and has a rectangular cross section and is formed in an annular shape as a whole. An annular groove 87 and an annular stepped portion 88 are respectively formed on the lower surface and the upper surface of the partition plate 75, and the seal ring 85 and the seal packing 86 are respectively installed therein. The depths of the annular groove 87 and the stepped portion 88 are formed to be smaller than the thicknesses of the seal ring 85 and the seal packing 86 by a predetermined amount, respectively.

  At the lower end of the motor housing 66, four fastening portions 89 (only three places are shown in FIG. 4) are formed. All of the tightening portions 89 are provided outward in the radial direction from the seal packing 86, and a female screw (not shown) is formed. On the other hand, at the upper end of the impeller housing 77, through holes (not shown) are formed at four locations that coincide with the tightening portion 89 of the motor housing 66. The through holes are formed so as to be positioned outward in the radial direction from the seal ring 85 in the same manner as the tightening portion 89.

  When assembling the drain pump 60, the pump motor 63 and the impeller 76 are accommodated in the motor housing 66 and the impeller housing 77, respectively, and then the impeller housing 77 is sandwiched between the seal ring 85 and the seal packing 86. It is arranged below the motor housing 66. After positioning the four through holes of the impeller housing 77 so as to coincide with the tightening portions 89 of the motor housing 66, the tightening bolts 90 are inserted into the through holes of the impeller housing 77 from below. Thereafter, each fastening bolt 90 is fastened to the female screw of the fastening portion 89 (the fastening portion 89, the through hole, and the fastening bolt 90 correspond to the fastening means of the present invention).

  When the impeller housing 77 and the motor housing 66 are fastened to each other, the impeller housing 77 and the motor housing 66 are positioned in contact with the lower surface and the upper surface of the partition plate 75. Thereby, the seal ring 85 and the seal packing 86 are pressed and compressed between the impeller housing 77 and the motor housing 66 and the partition plate 75 (in the annular groove 87 and the stepped portion 88), respectively, and the partition plate 75 and the impeller are compressed. The space between the housing 77 and the partition plate 75 and the motor housing 66 are joined in a liquid-tight manner.

  As a result, the inside of the impeller housing 77 is sealed from the outside of the drain pump 60 by the seal ring 85, negative pressure is generated in the impeller housing 77 by the rotation of the impeller 76, and water in the drain tank 32 can be sucked. . Further, the interior of the motor housing 66 is sealed from the inside of the impeller housing 77 by the partition plate 75 and the seal ring 85, and the inside of the motor housing 66 is sealed from the outside of the drain pump 60 by the seal packing 86. The pump motor 63 is prevented from being flooded by water in the water 77 or drainage outside the drain pump 60 stored below the washing / drying machine 10.

  Next, the operation of the drain pump 60 described above will be described. When electric power is supplied to the pump motor 63 via the harness 69, the pump motor 63 rotates the drive magnet 65 via the drive shaft 64. As a result, the impeller 76 is rotated by the magnetic force generated between the drive magnet 65 and the driven magnet 82, and the water in the drain tank 32 is sucked through the water inlet 62 connected to the drain tank 32. The water sucked by the impeller 76 is discharged from the water outlet 79 to the outside of the washing / drying machine 10 through the discharge hose 58.

  According to the present embodiment, the pump motor 63 and the impeller 76 are not connected, and the partition motor 75 and the seal ring 85 can completely block the pump motor 63 from moisture in the impeller housing 77. The seal packing 86 inserted between the motor housing 66 and the partition plate 75 reliably isolates the pump motor 63 from the drainage outside the drain pump 60 stored below the washer / dryer 10, and the motor housing 66 and the partition plate. The waterproof function at the joint with 75 can be improved. Further, since the seal ring 85 and the seal packing 86 are fixed seals, even when the drain pump 60 is used for a long time, the seal members 85 and 86 are not deteriorated due to sliding, and the waterproof property of the pump motor 63 is improved. Decline can be prevented.

In addition, the harness 69 of the pump motor 63 is pulled out from the upper portion of the motor housing 66, and the harness 69 is positioned above the joint between the partition plate 75 sealed by the seal packing 86 and the motor housing 66. Therefore, the harness 69 is not immersed in the drainage stored below the washing / drying machine 10, and the waterproofness of the pump motor 63 can be improved.
Further, since the seal ring 85 and the seal packing 86 are fixed seals and are not rotating parts such as a rotating shaft, a low cost drain pump does not require high product accuracy to ensure a sealing function. 60.

Further, a tightening portion 89 of the motor housing 66 is provided outward in the radial direction from the seal packing 86, and the through hole of the impeller housing 77 corresponding to the tightening portion 89 is also in the radial direction from the seal ring 85. Therefore, external water can be prevented from entering the drain pump 60 through the tightening portion 89 or the through hole.
Further, since the partition plate 75 that separates the inside of the motor housing 66 and the inside of the impeller housing 77 is sandwiched between the motor housing 66 and the impeller housing 77, the assembly is easy and the drain is low-cost. It can be a pump 60.

<Other embodiments>
The present invention is not limited to the above-described embodiments, and can be modified or expanded as follows.
The seal ring 85 and the seal packing 86 are not necessarily made of a synthetic rubber material, and natural rubber, a material that can satisfy the sealing function between the motor housing 66 and the impeller housing 77 and the partition plate 75, respectively. It can be formed of any material such as a resin material.
Further, the seal ring 85 and the seal packing 86 may be formed in any shape as long as the seal function can be satisfied.

A longitudinal sectional view of the entire washing and drying machine to which the drain pump according to this embodiment is attached Top view of the case of the washer-dryer shown in FIG. Perspective view seen from below the case External perspective view of the drain pump shown in FIG. Vertical section of drain pump

Explanation of symbols

  In the drawings, 10 is a washing / drying machine, 12 is a rotating tub (drying chamber), 32 is a drainage tank, 40 is a heat pump unit (hot air circulation device), 42 is a condenser (condenser), 43 is an evaporator (evaporator), 54 is a ventilation path (circulation path), 60 is a drain pump, 63 is a pump motor (motor), 64 is a drive shaft, 65 is a drive magnet (second magnet), 66 is a motor housing, 69 is a harness (electric harness), 75 is a partition plate, 76 is an impeller, 77 is an impeller housing, 82 is a driven magnet (first magnet), 85 is a seal ring (first seal member), 86 is a seal packing (second seal member), and 89 is tightened Reference numeral 90 denotes a fastening bolt (fastening means).

Claims (2)

A drying chamber provided in the circulation path and containing wet clothes after washing is supplied with warm air through the circulation path to dry the clothes and passes through the drying chamber to contain moisture. After the air is dried and heated by the evaporator and the condenser provided in the circulation path, the hot air circulation device that supplies the air to the drying chamber again and adheres to the evaporator when the air passes. A drain pump for a washing and drying machine that is attached to a washing and drying machine having a drainage tank for storing the moisture, and discharges the moisture in the drainage tank to the outside,
An impeller that includes a first magnet and rotates to suck moisture in the drainage tank;
An impeller housing that rotatably accommodates the impeller;
A motor for driving the impeller by a magnetic force generated between the second magnet and the first magnet by rotating a second magnet connected to the drive shaft;
A motor housing that houses the motor;
A partition plate interposed between the impeller housing and the motor housing and blocking the interior of the impeller housing and the interior of the motor housing from each other;
A first seal member inserted between the impeller housing and the partition plate;
A second seal member inserted between the motor housing and the partition plate;
By tightening the impeller housing and the motor housing together, the first seal member and the second seal member are pressed between the partition plate, the partition plate and the impeller housing, and the partition. A drain pump for a washing and drying machine, comprising fastening means for liquid-tightly joining the plate and the motor housing.   An electrical harness is connected to the motor, the electrical harness is pulled out from the upper part of the motor housing, and the electrical harness is positioned above the junction between the partition plate and the motor housing. The drain pump for a washing and drying machine according to claim 1,

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