JP6667221B2 - Drum type washing machine - Google Patents

Description

  Embodiments of the present invention relate to a drum type washing machine.

  Conventionally, there is a drum type washing machine provided with a hot water heater for heating washing water to make it hot water. The hot water heater is provided, for example, inserted inside the rotary tank so as to penetrate the cylindrical bottom portion of the water tank, that is, the back of the water tank at right angles. In this case, if the central axis of the water tank is horizontal, the hot water heater is also horizontal. That is, in this case, the hot water heater is parallel to the surface of the water stored in the water tank. Therefore, even if the water surface position in the water tub changes due to vibration of the rotary tub during the washing operation in which the hot water heater is operated, for example, the problem that a part of the hot water heater is exposed from the water surface hardly occurs.

  However, in the case of a so-called oblique drum type washing machine in which the central axis of the water tank is inclined with respect to the horizontal, the hot water heater is parallel to the central axis of the inclined water tank. That is, in this case, the hot water heater is inclined with respect to the surface of the water stored in the water tank. For this reason, the depth position of the hot water heater with respect to the water surface is not uniform over the entire hot water heater. Therefore, in this case, for example, during the washing operation in which the hot water heater is operated, if the water surface position in the water bath fluctuates due to the vibration of the rotary bath, only a part of the hot water heater may always be exposed from the water surface. In such a case, there is a possibility that a part of the hot water heater is exposed from the water surface without being immersed in water, and the exposed part is in an empty-fired state.

JP 2012-170682 A

  Therefore, there is provided a drum-type washing machine capable of immersing the entire hot water heater as uniformly as possible in water stored in the water tub when the center axes of the water tub and the rotary tub are inclined.

The drum type washing machine is a bottomed cylindrical tank having a front side opened and a rear side closed, and has a central axis inclined downward so as to descend rearward, and a rotary tub rotatably housed inside the water tub. And provided on a peripheral wall of the water tank inside the water tank and vertically below the rotary tank, for heating water stored in the water tank, and in a front-rear direction of the water tank. A hot water heater that is formed to be long and bent at an intermediate portion in the front-rear direction, and a safety device that detects an abnormality of the hot water heater by detecting a temperature of a front portion that is horizontal in a longitudinal direction of the hot water heater. And a separating member provided inside the water tank and formed along a peripheral wall of the water tank to separate the hot water heater from the water tank . In the hot water heater, at least in a state where water is stored in the water tank, a front side is horizontal and a rear side is lowered rearward. The safety device is provided outside the peripheral wall of the water tank at a position corresponding to a horizontal front portion in a longitudinal direction of the hot water heater. The isolation member has a protrusion corresponding to the safety device and has a protrusion protruding toward the water tank, and is fixed to the water tank by a fastening member such that the protrusion contacts the water tank.

1 is a perspective view showing an example of the appearance of a drum type washing machine according to an embodiment. FIG. 2 is a perspective view showing the drum type washing machine according to the embodiment, with an outer box removed. A perspective view showing a configuration around a water tank according to one embodiment. Front view showing a configuration around a water tank according to one embodiment. FIG. 2 is a plan view illustrating an example of a hot water heater according to one embodiment. FIG. 4 is a cross-sectional view taken along line X6-X6 in FIG. FIG. 4 is a cross-sectional view taken along line X7-X7 of FIG. Perspective view showing an example of an isolation member according to one embodiment. Sectional drawing which expands and shows the vicinity of the protrusion part of an isolation member about one Embodiment. 1 is a cross-sectional plan view illustrating a configuration around an isolation member and a holding member according to an embodiment. Sectional view showing an attached state of an isolation member according to one embodiment. Perspective view showing installation of a hot water heater for one embodiment. Cross-sectional plan view showing installation of a hot water heater for one embodiment. Bottom view showing the positional relationship between the safety device and the hot water heater for one embodiment FIG. 2 is a perspective view of a water tank viewed from the rear, showing the installation of a hot water heater according to one embodiment. Sectional drawing which expands and shows the vicinity of the communication part of FIG. 6 about one Embodiment. FIG. 3 is a perspective view showing a protective cover and showing an aquarium from the rear, according to one embodiment.

Hereinafter, an embodiment will be described with reference to the drawings.
The drum-type washing machine 10 shown in FIGS. 1 and 2 includes an outer box 11, a door 12, a water tub 20, and a rotating tub 30. In the present embodiment, the door 12 side with respect to the outer box 11 is the front side of the washing machine 10. The horizontal direction perpendicular to the front-back direction is defined as the left-right direction. The washing machine 10 is a so-called oblique drum type washing machine in which the center axis of the water tub 20 and the center axis of rotation of the rotary tub 30 are inclined with respect to the ground. The center axis of the water tank 20 and the center axis of rotation of the rotary tank 30 coincide with each other. In the following description, the center axis of the water tank 20 and the center axis of rotation of the rotating tank 30 are commonly referred to as a center axis J. The washing machine 10 may or may not have a heat pump type or heater type drying function, for example.

  The outer box 11 is formed in a substantially rectangular box shape using a steel plate or the like. The water tank 20 is housed inside the outer box 11, and is elastically supported by the damper 18 as shown in FIGS. The rotating tank 30 is housed inside the water tank 20. Each of the water tank 20 and the rotary tank 30 is formed in a so-called bottomed cylindrical shape in which one side in the axial direction of the cylindrical shape is open and the other side is closed. In the present embodiment, in the water tank 20 and the rotary tank 30, the closed cylindrical bottom part on the opposite side to the opening side is referred to as a back part. The lower part in the gravity direction inside the water tank 20 and the rotary tank 30 is referred to as a bottom.

  The water tank 20 has a water tank opening 21 shown in FIG. 2 and a water tank back 22 shown in FIG. The water tank opening 21 is formed at one end of the cylindrical shape of the water tank 20, as shown in FIG. As shown in FIG. 3, the water tank back 22 is provided at the other end of the cylindrical shape of the water tank 20, and closes the other end of the cylindrical shape of the water tank 20. The water tank back 22 is the bottom of the water tank 20 having a bottomed cylindrical shape.

  The water tank 20 has a drain port 23 and a depression 24 as shown in FIG. The drain port 23 is formed at a lower part, that is, a bottom part of the water tank 20 in the direction of gravity, and penetrates a water tank peripheral wall 25 forming a cylindrical shape. The depression 24 is provided at the bottom of the water tank 20 at a position shifted in the left-right direction from the center axis of the water tank 20. The depression 24 is formed integrally with the water tank 20 by depressing the bottom left portion of the water tank peripheral wall 25 outward. The bottom surface of the depression 24 is substantially horizontal or inclined backward by about 1 ° to 5 °.

  In the case of the present embodiment, as shown in FIG. 6, the bottom of the recess 24 is inclined so as to descend rearward at an inclination angle β smaller than the inclination angle α of the rotation center axis J with respect to the horizontal direction. That is, the inclination angle β of the bottom of the recess 24 is smaller than the inclination angle α of the rotation center axis J. In other words, the angle β between the horizontal direction and the inclination direction of the bottom of the recess 24 is smaller than the angle α between the horizontal direction and the rotation center axis J.

  As shown in FIG. 2, the rotary tank 30 has a rotary tank opening 31 and a rotary tank back 32. The rotating tank opening 31 is formed at one end of the cylindrical shape of the rotating tank 30. The rotating tank back 32 is provided at the other end of the rotating tank 30 having a cylindrical shape, and closes the other end of the rotating tank 30 having the cylindrical shape. The rotating tank back 32 is the bottom of the rotating tank 30 having a bottomed cylindrical shape.

  Further, as shown in FIG. 2, the washing machine 10 includes a water supply device 13, a drain valve 14, and a circulation pump 15. The water supply device 13 is provided in the outer box 11 and at an upper part of the water tank 20 on one side of the left and right sides. The water supply device 13 has a water supply valve 131 and a water injection case 132. The water supply valve 131 is connected to an external water source such as a water supply (not shown), and is opened and closed by a control device (not shown). When the water supply valve 131 is opened, water from an external water source is injected into the water tank 20 through the water supply valve 131 and the water injection case 132.

  The drain valve 14 and the circulation pump 15 are provided below the water tank 20. The drain valve 14 is, for example, an electromagnetic valve, and is opened and closed by a control device (not shown). The circulation pump 15 is configured to be able to adjust the discharge amount of water under the control of a control device (not shown). The drain valve 14 is connected via a drain hose 16 to a drain port 23 provided at the bottom of the water tank 20. The inlet side of the circulation pump 15 branches off from a water channel connecting the drain port 23 and the drain valve 14 and is connected to the drain port 23. The outlet side of the circulation pump 15 is connected to a nozzle (not shown) via a circulation hose 17.

  When the drain valve 14 is opened, the water in the water tub 20 is discharged from the drain port 23 to the outside of the washing machine 10 through the drain valve 14. Further, when the circulation pump 15 is operated with the drain valve 14 closed, the water in the water tank 20 is supplied from a nozzle (not shown) into the water tank 20 and the rotating tank 30, whereby the water tank 20 and the rotating tank 30 are rotated. Circulates inside.

  The washing machine 10 includes a hot water heater 40 as shown in FIG. The hot water heater 40 heats water stored in the water tank 20 to generate hot water. For example, by operating the hot water heater 40 and the circulation pump 15 during the washing operation, the washing water can be heated and circulated. The hot water heater 40 is provided inside the water tank 20, below the rotary tank 30 and inside the water tank 20. In this case, the hot water heater 40 is provided in the depression 24 formed in the water tank peripheral wall 25. In the case of the present embodiment, the hot water heater 40 is provided below the rotary tank 30 at a position eccentric to the left with respect to the center axis J.

  Here, the rotating tub 30 rotates at a low speed in the clockwise and counterclockwise directions during the washing operation. In addition, the rotating tub 30 rotates at a higher speed in the dehydrating operation in either the clockwise direction or the counterclockwise direction than in the washing operation. In this case, the hot water heater 40 is provided at a position eccentric to the rotation direction side of the rotary tub 30 during the spin-drying operation. That is, for example, the washing machine 10 of the present embodiment rotates at a high speed in the clockwise direction during the spin-drying operation, as indicated by an arrow A in FIG. In this case, the hot water heater 40 is provided at a position on the rotation direction side, that is, on the left side when viewed from the front with respect to the center axis J.

  The hot water heater 40 is, for example, a sheath heater or the like, and is formed so as to be generally longer in the front-rear direction of the water tank 20, and is bent at an intermediate portion in the front-rear direction. Specifically, the hot water heater 40 has a heater main body 41, a connection part 42, and a fitting part 43, as shown in FIGS. The heater main body 41 is a heating element that generates heat when supplied with electric power. The heater main body 41 has a heating line inside a long and thin metal tube, and is formed so as to spread on the same surface while bending the metal tube a plurality of times.

  The fitting portion 43 is made of, for example, rubber or synthetic resin having heat resistance. As shown in FIG. 12, the fitting portion 43 is formed in an oval block shape that is long in the left-right direction as a whole. As shown in FIG. 5, the fitting portion 43 has, for example, a metal flange 431 around the periphery thereof. The heater body 41 extends from one surface of the fitting portion 43. The connecting portion 42 protrudes from the other surface of the fitting portion 43. The connection portion 42 has one side connected to the heater main body 41 and the other side connected to a power supply device. The periphery of the connection portion 42 is covered with a flame-retardant and elastic material such as a silicon tube.

  As shown in FIG. 6, the heater main body 41 is configured to be bent at an intermediate portion in the longitudinal direction so that at least a front portion is horizontal and a rear portion is lowered rearward at least in a state where water is stored in the water tank 20. Have been. In the present embodiment, the rear portion of the heater main body 41 is configured to be parallel to the central axis J.

  That is, the heater main body 41 has the inclined portion 411 and the horizontal portion 412. In this case, the boundary between the inclined portion 411 and the horizontal portion 412 is a bent portion 413. The inclined portion 411 forms a rear portion of the heater main body 41 with respect to the bent portion 413, and the horizontal portion 412 forms a front portion of the heater main body 41 with respect to the bent portion 413. In other words, the inclined portion 411 forms the base end side of the heater main body 41, and the horizontal portion 412 forms the distal end side of the heater main body 41. The axis P shown in FIG. 6 is an axis parallel to the central axis J.

  Then, the inclined portion 411 is lowered rearward along the axis P. In this case, the inclined portion 411 is inclined so as to extend toward the central axis J. The horizontal portion 412 is inclined with respect to the direction of the central axis J, that is, the direction of the axis P, and extends horizontally with respect to the ground, that is, parallel to the surface of the water stored in the water tank 20. In this case, as shown in FIG. 5, the dimension L2 of the horizontal portion 412 in the front-rear direction is larger than the dimension L1 of the inclined portion 411 in the front-rear direction. The angle α between the inclined portion 411 and the horizontal portion 412 is substantially equal to the angle of inclination of the central axis J with respect to the horizontal direction. In the case of the present embodiment, the angle α is, for example, about 5 ° to 10 °.

  Incidentally, since the water tank 20 is elastically supported by the damper 18, when water is stored in the water tank 20, the inclination of the water tank 20 slightly changes. On the other hand, the horizontal portion 412 only needs to be horizontal with at least water stored in the water tank 20. That is, when no water is stored in the water tank 20, the horizontal portion 412 does not necessarily have to be horizontal.

  As shown in FIG. 7, the tip of the heater main body 41, that is, the height position of the horizontal portion 412, is lower than the lowest water level W1 of the water stored in the water tank 20 during the washing operation, and the lowest position of the rotary tank 30. It is below the position W2. That is, the entire heater body 41 of the hot water heater 40 is located below the minimum water level W1 of the water stored in the water tank 20 and below the lowest position W2 of the rotary tank 30 during the washing operation. .

  Further, the washing machine 10 includes a drain port cover 51, an isolation member 52, and a holding member 53, as shown in FIGS. The drain port cover 51 is provided on the water tank peripheral wall 25 at the bottom of the water tank 20, as shown in FIGS. The drain port cover 51 is made of, for example, a synthetic resin, and covers a portion above the drain port 23 while being separated from the water tank peripheral wall 25, as shown in FIG. As shown in FIG. 4, the drain port cover 51 is provided substantially below the center axis J of the water tank 20 and the rotary tank 30, and is provided on the right side of the recess 24 to which the hot water heater 40 is attached. In other words, the drain port cover 51 is provided on the rotation direction side of the rotary tub 30 with respect to the hot water heater 40 during dehydration.

  Here, when the rotary tub 30 rotates at a high speed during spin-drying, if foreign matter or the like exists between the water tub 20 and the rotary tub 30, the foreign matter or the like moves at a high speed with the rotation of the rotary tub 30. Therefore, when the foreign matter or the like moving at high speed collides with the hot water heater 40, the hot water heater 40 may be damaged. On the other hand, in the present embodiment, the drain port cover 51 is provided in front of the hot water heater 40 in the rotation direction of the rotary tub 30, that is, the traveling direction of foreign matter or the like. Therefore, for example, foreign matter or the like that moves with the high-speed rotation of the rotary tub 30 during the spin-drying operation hits the drain port cover 51 before hitting the hot water heater 40. Therefore, according to this configuration, it is possible to prevent foreign matter and the like from colliding with the hot water heater 40 at a high speed and damaging the hot water heater 40 as much as possible.

  The separating member 52 and the holding member 53 are for fixing the hot water heater 40 to the depression 24 of the water tank 20. The separating member 52 and the holding member 53 are made of a material having rust prevention and heat resistance, for example, a metal material such as stainless steel. As shown in FIG. 3, the isolation member 52 is provided so as to fit inside the recess 24.

  The separating member 52 is provided between the hot water heater 40 and the water tank 20, and thermally isolates the hot water heater 40 from the water tank 20. That is, the isolation member 52 prevents heat from the hot water heater 40 from directly hitting the water tank 20. As shown in FIG. 8, the isolation member 52 has a shape in which one substantially rectangular plate is bent in a substantially right-angle direction at an intermediate portion in the left-right direction. That is, as shown in FIG. 8, the isolation member 52 has a bottom surface portion 521 and a side surface portion 522. The bottom part 521 is configured substantially horizontally, and the side part 522 is configured substantially vertical.

  The separating member 52 has a protruding portion 523, a through hole 524, and a mounting portion 525. The protruding portion 523 is provided near the front side of the bottom portion 521, and is formed by slightly protruding the bottom portion 521 downward in a rectangular shape, that is, toward the water tank peripheral wall 25 side. In this case, as shown in FIG. 9, the protrusion amount H of the protrusion 523 with respect to the bottom surface 521 is, for example, about 0.5 to 1 mm.

  As shown in FIG. 8, the through holes 524 are formed to penetrate the bottom portion 521 in a circular shape, and a plurality of, in this case, four, are provided around the protruding portion 523. Also, one attachment part 525 is provided on each of the bottom part 521 and the side part 522. As shown in FIG. 10, a fastening member 61 such as a screw is passed through the through hole 524. Then, the fastening member 61 passed through the through hole 524 is screwed into the water tank peripheral wall 25. As shown in FIG. 3, a fastening member 62 such as a screw is passed through the mounting portion 525. Then, the fastening member 62 passed through the mounting portion 525 is screwed into the front end of the water tank 20. Thus, the separating member 52 is fixed to the water tank peripheral wall 25.

  Here, the protruding portion 523 protrudes downward from the bottom surface portion 521. For this reason, when the fastening member 61 is screwed into the water tank peripheral wall 25 through the through hole 524 around the protrusion 523, as shown in FIG. 11, the bottom 521 around the protrusion 523 with the protrusion 523 as a fulcrum. It elastically deforms into a bow shape. As a result, the protrusion 523 is strongly pressed against the water tank peripheral wall 25.

  As shown in FIGS. 6, 10, and 12, the holding member 53 is provided inside the protrusion 523 on the bottom surface 521 of the isolation member 52. In this case, the holding member 53 is fixed to the separating member 52 by, for example, spot welding. The holding member 53 is configured to protrude upward from the bottom surface 521 of the isolation member 52, as shown in FIGS. The tip of the hot water heater 40 is inserted into the holding member 53. Thereby, the holding member 53 holds the hot water heater 40 in a state where it is separated from the water tank peripheral wall 25.

  Specifically, as shown in FIGS. 6 and 12, the holding member 53 has an insertion portion 531, a lower guide portion 532, an upper guide portion 533, and a lateral guide portion 534. As shown in FIG. 12, the insertion portion 531 is formed in a rectangular ring shape penetrating in the front-rear direction. The distal end of the hot water heater 40 is inserted into the insertion portion 531 so as to penetrate the insertion portion 531 as shown in FIG.

  The lower guide portion 532 is provided below the insertion portion 531, that is, on the bottom portion 521 side of the isolation member 52. The lower guide portion 532 is formed in a plate shape that is inclined so as to rise from the bottom portion 521 side of the isolation member 52 toward the insertion portion 531 side. When the tip of the hot water heater 40 is inserted into the insertion portion 531, if the tip of the hot water heater 40 hits the lower guide 532, the tip of the hot water heater 40 moves upward along the lower guide 532. Thus, the distal end portion of the hot water heater 40 is guided by the lower guide portion 532 to the insertion portion 531 side. The lower guide 532 is fixed to the protrusion 523 of the separating member 52. Therefore, the lower guide portion 532 also functions as a support portion that supports the entire holding member 53.

  The upper guide portion 533 is provided above the insertion portion 531, that is, on the side opposite to the bottom surface portion 521 of the isolation member 52. The upper guide portion 533 is formed in a plate shape that is inclined so as to descend from the rotary tank 30 side toward the insertion portion 531 side. When inserting the tip of the hot water heater 40 into the insertion portion 531, if the tip of the hot water heater 40 hits the upper guide 533, the tip of the hot water heater 40 moves downward along the upper guide 533. . As a result, the distal end portion of the hot water heater 40 is guided by the upper guide portion 533 to the insertion portion 531 side.

  The lateral guide portion 534 is provided on the side of the insertion portion 531, in this case, on the side surface 522 side of the isolation member 52. In the present embodiment, the lateral guide portion is not provided on the side opposite to the side surface portion 522 of the isolation member 52, but may be provided. The lateral guide portion 534 is formed in a plate shape inclined from the side surface portion 522 side of the separating member 52 toward the insertion portion 531 side. As shown in FIGS. 10 and 13, the size of the gap S between the side surface portion 522 of the isolation member 52 and the lateral guide portion 534 is set to such a size that the tip of the hot water heater 40 cannot be inserted. .

  When the distal end of the hot water heater 40 is inserted into the insertion portion 531 and the distal end of the hot water heater 40 is moved from the rear side to the front side along the side surface 522 of the isolation member 52, as shown in FIG. The side surface portion 522 of the distal end portion of the hot water heater 40 corresponds to the lateral guide portion 534. Then, the distal end of the hot water heater 40 moves to the insertion section 531 along the lateral guide section 534. As a result, the distal end portion of the hot water heater 40 is guided by the lateral guide portion 534 to the insertion portion 531 side. In this case, the size of the gap S between the side surface portion 522 of the isolation member 52 and the lateral guide portion 534 is set to a size that does not allow the front end portion of the heater main body 41 to be inserted. The part does not accidentally enter the gap between the side surface part 522 and the lateral guide part 534.

  As shown in FIGS. 6 and 13 to 15, the hot water heater 40 is passed through the water tank back 22 from behind the water tank 20 and inserted into the water tank 20. Specifically, the water tank back part 22 has a communication part 221 as shown in FIGS. 10 and 13 to 15. The communication part 221 is formed by penetrating the water tank back part 22 toward the center axis J direction of the water tank 20 and the rotary tank 30.

  The communication portion 221 spatially connects the outside and the inside of the water tank 20 and is formed in an oval shape along the outer diameter of the fitting portion 43 of the hot water heater 40. In this case, the wall surface forming the periphery of the communication portion 221 is parallel to the center axis J direction as shown in FIG. The dashed line P in FIG. 15 indicates the axis of the communication portion 221. In this case, the axis P of the communication portion 221 is parallel to the central axis J, and passes through a substantially central portion of the heater body 41 of the hot water heater 40 in the thickness direction.

  When the hot water heater 40 is attached to the water tank 20, the fitting portion 43 is fitted inside the communication portion 221 in a watertight manner. Further, since the flange portion 431 is locked around the communication portion 221, the insertion of the hot water heater 40 is restricted at a predetermined position. Further, the flange 431 is in close contact with the periphery of the communication portion 221, that is, the outer surface of the water tank back portion 22, so that water leakage from the communication portion 221 can be more effectively prevented.

  The washing machine 10 is provided with two safety devices 54 and 55 as shown in FIG. The safety devices 54 and 55 detect an overheating abnormality or an overcurrent abnormality of the hot water heater 40, and cut off the current supply to the hot water heater 40 when the abnormality is detected. In the following description, the safety device 54 is referred to as a first safety device 54, and the safety device 55 is referred to as a second safety device 55. The first safety device 54 is, for example, a thermal fuse. The second safety device 55 is, for example, a combination of a temperature fuse and a current fuse.

  The safety devices 54 and 55 are provided at positions corresponding to the horizontal portion 421 of the heater main body 41 on the outer surface of the water tank 20, that is, the surface opposite to the hot water heater 40, as shown in FIGS. I have. In this case, the first safety device 54 is provided in a straight portion near the front end of the horizontal portion 421 of the heater main body 41. The second safety device 55 is provided at a bent portion near the front end of the horizontal portion 421 of the heater main body 41. Thereby, the safety devices 54 and 55 detect an abnormality of the hot water heater 40 by detecting the temperature of the front portion, that is, the horizontal portion 412 in the longitudinal direction of the hot water heater 40. In addition, a metal stay 56 is provided between the safety devices 54 and 55 and the outer surface of the water tank 20. The safety devices 54 and 55 are covered with a container 57 made of, for example, a synthetic resin.

  The washing machine 10 includes a protective cover 58, as shown in FIG. The protective cover 58 is provided on the outer surface of the water tank 20 and surrounds the periphery of the hot water heater 40. The protective cover 58 is made of, for example, a flame-retardant material such as ABS resin. Specifically, the protective cover 58 has a mounting surface portion 581 and a peripheral side surface portion 582. The mounting surface 581 is attached to the water tank 20 in contact with the outer surface of the water tank 20.

  A drawing hole 563 is formed in the mounting surface 581. The extraction hole 563 is an oval through hole slightly smaller than the communication portion 221, and is formed at a position facing the communication portion 221. After the hot water heater 40 is attached to the water tank 20, the protection cover 58 is attached to the water tank 20 by passing the connecting portion 42 of the hot water heater 40 through the drawing hole 563. In this case, the boundary between the fitting part 43 of the hot water heater 40 and the communication part 221 of the water tank 20 is covered by the mounting surface 581 of the protective cover 58.

  The peripheral side surface portion 582 is provided so as to extend around the mounting surface portion 581 in a direction perpendicular to the mounting surface portion 581. The peripheral side surface portion 582 surrounds the periphery of the connection portion 42 of the hot water heater 40. In this case, the peripheral side surface portion 582 surrounds at least the upper side and the left and right sides. In the present embodiment, the peripheral side surface portion 582 is not configured to surround the lower part and the rear part of the connecting part 42, but may be configured to surround the lower part and the rear part of the connecting part 42. According to this, even if an abnormality occurs in the hot water heater 40 and a spark or the like is generated from the connecting portion 42, the diffusion of the spark is prevented by the flame-retardant protective cover 58 covering the periphery of the connecting portion 42. be able to. Accordingly, even if a spark or the like is generated from the connecting portion 42, the effect of the spark or the like on other members such as the water tank 20 is reduced as much as possible by preventing the spread of the spark or the like. As a result, safety is improved.

  According to this, the heater main body 41 of the hot water heater 40 has the inclined portion 411 parallel to the central axis J and inclined with respect to the horizontal direction, and the horizontal portion inclined with respect to the central axis J and parallel to the horizontal direction. 412. That is, the hot water heater 40 is configured to be bent at an intermediate portion in the longitudinal direction so that the front side is long in the front-rear direction of the water tank and the front side is horizontal and the rear side is parallel to the center axis J. According to this, the front end of the heater main body 41 can be located deeper with respect to the water surface as compared with the case where the heater main body 41 is linearly formed as a whole as shown by a two-dot chain line in FIG. it can. That is, the entire heater main body 41 of the hot water heater 40 can be soaked as uniformly as possible in the water stored in the water tank 20. Thus, it is possible to prevent only the tip of the hot water heater 40 from being exposed from the water surface without being immersed in water. Therefore, it is possible to suppress abnormalities caused by partial heating of the hot water heater 40, and as a result, safety is improved.

  As shown in FIG. 4, the hot water heater 40 is provided at a position eccentric to a position directly below the center axis J of the rotary tank 30. According to this, the distance between the hot water heater 40 and the rotary tub 30 can be made larger than when the hot water heater 40 is provided directly below the central axis J of the rotary tub 30. Thus, even when the water tank 20 and the rotary tank 30 relatively move due to, for example, vibration during the spin-drying operation, the hot water heater 40 comes into contact with the high-speed rotating rotary tank 30 and breaks. That can be avoided. In addition, by securing a greater distance between the hot water heater 40 and the rotary tub 30, it is possible to prevent foreign matter and the like from being caught between the hot water heater 40 and the rotary tub 30.

  The hot water heater 40 is provided at a position eccentric with respect to the center axis J of the rotary tub 30 in the direction of rotation of the rotary tub 30 during the spin-drying operation. According to this, for example, during the dehydration operation, even if foreign matter or the like enters between the water tank 20 and the rotating tank 30 and moves with the high-speed rotation of the rotating tank 30, the foreign matter is not hit by the hot water heater 40. The drain cover 51. Therefore, according to this configuration, it is possible to prevent foreign matter and the like from colliding with the hot water heater 40 at a high speed and damaging the hot water heater 40 as much as possible. As a result, safety can be further improved.

  The safety devices 54 and 55 are provided in the front portion of the heater main body 41, that is, at positions corresponding to the horizontal portion 412 in the hot water heater 40, and detect an abnormality of the hot water heater 40 by detecting the temperature of the horizontal portion 412. I do. Normally, when the hot water heater 40 is energized, the temperature of the heater main body 41 increases from the front end side of the horizontal portion 412. Therefore, according to this configuration, the abnormality of the hot water heater 40 can be detected as soon as possible by detecting the temperature of the tip of the horizontal portion 412, which tends to become hot relatively quickly among the safety devices 54 and 55 and the heater body 41. Can be. As described above, according to the present embodiment, the safety can be further improved by increasing the responsiveness of the safety devices 54 and 55.

  The separating member 52 has a protrusion 523. The protruding portion 523 has a portion corresponding to the safety devices 54 and 55 protruding toward the water tank, and comes into contact with the water tank 20. According to this, for example, as shown in FIG. 11, when the isolation member 52 is attached to the inside of the water tank 20 by a fastening member 61 such as a screw, the bottom portion 521 around the protrusion 523 with the protrusion 523 as a fulcrum. Is elastically deformed into a bow shape. Then, the protruding portion 523 is strongly pressed against the water tank peripheral wall 25. Thereby, the heat transfer from the protrusion 523 to the safety devices 54 and 55 can be improved, and the responsiveness of the safety devices 54 and 55 can be improved. Therefore, abnormality of the hot water heater 40 can be detected quickly, and as a result, safety can be further improved.

  The water tank back part 22 has a communication part 221. The communication part 221 penetrates in the direction of the central axis J and communicates the outside and the inside of the water tank 20. Further, the hot water heater 40 has a fitting portion 43. The fitting portion 43 is provided at a portion of the hot water heater 40 that is parallel to the central axis J of the water tank 20. Then, the hot water heater 40 is passed through the communication portion 221 from the outside to the inside of the water tank 20, and is attached by fitting the fitting portion 43 to the communication portion 221.

  In this case, the wall surface forming the periphery of the communication portion 221 and the surface around the fitting portion 43 are both parallel to the center axis J direction as shown in FIG. Then, the hot water heater 40 is inserted into the communication portion 221 along the central axis J direction. According to this, when the hot water heater 40 is attached, the wall surface that forms the periphery of the communication portion 221 and the surface around the fitting portion 43 make contact not with a point but with a surface.

  That is, for example, when a conventional hot water heater configured linearly in the front-rear direction is to be mounted horizontally, it is necessary to insert the hot water heater in a state of being inclined with respect to a wall forming the periphery of the communication portion 221. . In this case, the hot water heater 40 is attached in a state where the periphery of the communication part 221 and the periphery of the fitting part 43 are in point contact with each other. Then, the fitting between the communication part 221 and the fitting part 43 is weakened, and the risk of water leakage or the like increases.

  On the other hand, for example, if the communication portion 221 is formed so that the wall surface forming the periphery of the communication portion 221 is horizontal, the wall surface around the communication portion 221 and the surface around the fitting portion 43 can be brought into contact with each other. it can. Therefore, the fitting between the communication part 221 and the fitting part 43 can be strengthened, and as a result, the occurrence of water leakage or the like can be suppressed. However, in this case, the operation of forming the communication portion 221 is complicated. That is, a mold and the like for molding the water tank 20 are complicated, and the parts cost is high.

  On the other hand, in the present embodiment, the fitting portion 43 is provided on the inclined portion 411 that is inclined in the central axis J direction with respect to the horizontal direction. According to this, the wall surface around the communication portion 221 and the surface around the fitting portion 43 can be brought into surface contact without forming the wall surface around the communication portion 221 horizontally. Thereby, the fitting between the communication portion 221 and the fitting portion 43 can be strengthened with a relatively simple configuration. As a result, it is possible to effectively suppress the occurrence of water leakage and the like, and it is possible to suppress a complicated mold for molding the water tank 20 and an increase in parts cost.

  The holding member 53 has a plurality of guide portions 532, 533, 534. When the hot water heater 40 is inserted into the water tank 20 through the communication portion 221, the guide portions 532, 533, and 534 contact the front end portion of the hot water heater 40 to hold the front end portion of the hot water heater 40 to the holding member 53. Of the insertion portion 531. That is, the worker attaches the hot water heater 40 to a predetermined position in the water tank 20 from the outside of the water tank 20 through the communication portion 221 formed in the water tank back 22. Therefore, when attaching the hot water heater 40 to the water tub 20, it becomes difficult for the operator to visually recognize the mounting position of the hot water heater 40 in the water tub 20, and as a result, the workability is reduced.

  On the other hand, according to the present embodiment, the hot water heater 40 is guided to a predetermined mounting position by each of the guide portions 532, 533, and 534. Therefore, the hot water heater 40 can be easily mounted at a predetermined position without directly observing the mounting position of the hot water heater 40. Therefore, the hot water heater 40 can be easily attached to a predetermined position, and as a result, workability can be improved.

  The gap S between the lateral guide portion 534 of the holding member 53 and the side surface portion 522 of the isolation member 52 is set to a size such that the tip of the heater main body 41 cannot be inserted. According to this, when attaching the hot water heater 40 to the water tank 20, the tip of the heater main body 41 does not accidentally enter the gap between the side surface portion 522 and the lateral guide portion 534. That is, as shown in FIG. 13, for example, by inserting the distal end portion of the heater main body 41 along the side surface portion 522 of the isolation member 52, the distal end portion of the heater main body 41 hits the lateral guide portion 534, and the insertion portion is inserted. Guided inside 531. Thereby, the hot water heater 40 can be more easily attached, and as a result, the workability can be further improved.

  The bottom part of the water tank 20 in which the hot water heater 40 is installed is inclined so as to descend rearward at an angle β smaller than the inclination angle α of the rotation center axis J with respect to the horizontal direction. That is, the inclination angle β of the bottom of the concave portion 24 is larger than 0 ° and smaller than the inclination angle α of the rotation center axis J. According to this, the tip of the heater main body 41 can be brought as close as possible to the bottom of the water tank 20 while keeping the horizontal portion 412 of the heater main body 41 parallel to the water surface. That is, the tip of the heater main body 41 can be brought as close as possible to the safety devices 54 and 55. As a result, the responsiveness of the safety devices 54 and 55 can be further increased.

  In the present embodiment, the drain outlet 23 is provided on the rear side of the water tank 20. And the bottom part of the water tank 20 in which the hot water heater 40 is installed, that is, the bottom part of the concave part 24 is inclined rearward. For this reason, the water around the hot water heater 40 flows toward the drain port 23 along the slope of the bottom of the recess 24. Therefore, the water around the hot water heater 40 can be appropriately drained.

Note that terms such as “horizontal”, “right angle”, and “vertical” used in the description of the above embodiments are not necessarily strict, and manufacturing errors can be allowed.
Further, in the heater main body 41 of the hot water heater 40, a part of the tip portion of the horizontal portion 412 may be bent downward or upward so as not to contact the bottom portion 521 of the isolation member 52. Also in this case, the length dimension in the front-rear direction of the horizontal portion of the horizontal portion 412, that is, the length dimension in the front-rear direction of the horizontal portion 412 excluding the leading end portion of the horizontal portion 412 bent downward or upward is the inclined portion. It is desirable that the length 411 be larger than the length dimension in the front-rear direction.

  As described above, one embodiment of the present invention has been described, but this embodiment is presented as an example and is not intended to limit the scope of the invention. The new embodiment can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

  In the drawing, 10 is a drum-type washing machine, 20 is a water tub, 22 is a back part, 221 is a communication part, 25 is a water tank peripheral wall (peripheral wall), 30 is a rotating tub, 40 is a hot water heater, 43 is a fitting part, and 52 is a fitting part. An isolation member, 523 is a projection, 53 is a holding member, 532 is a lower guide (guide), 533 is an upper guide (guide), 534 is a lateral guide (guide), and 54 and 55 are safety devices. Show.

Claims (7)

A water tank that is formed in a bottomed cylindrical shape in which the front side is open and the rear side is closed, and whose central axis is inclined downward toward the rear,
A rotating tank rotatably housed inside the water tank,
It is provided on the peripheral wall of the water tank inside the water tank and vertically below the rotary tank, and heats the water stored in the water tank, and is formed long in the front-rear direction of the water tank. A hot water heater bent at an intermediate portion in the front-rear direction,
A safety device that detects an abnormality of the hot water heater by detecting a temperature of a front portion that is horizontal in a longitudinal direction of the hot water heater,
An isolating member provided inside the water tank and formed along a peripheral wall of the water tank to separate the hot water heater and the water tank ,
The hot water heater, at least in a state where water is stored in the water tank, the front side is horizontal and the rear side is lowered rearward ,
The safety device is provided at a position corresponding to a horizontal front portion of the longitudinal direction of the hot water heater outside the peripheral wall of the water tank,
The isolation member has a protrusion corresponding to the safety device and has a protrusion protruding toward the water tank, and the protrusion is fixed to the water tank in a state where the protrusion contacts the water tank by a fastening member.
Drum type washing machine. The hot water heater is provided at a position eccentric to immediately below a rotation center axis of the rotary tank,
The drum type washing machine according to claim 1. The hot water heater is provided at a position eccentric to a position directly below a rotation center axis of the rotary tub in a direction in which rotation of the rotary tub rotates in a dehydrating operation.
The drum type washing machine according to claim 2. A back portion, which is a cylindrical bottom portion of the water tank, has a communication portion that penetrates toward the central axis direction and communicates the outside and the inside of the water tank,
The hot water heater has a fitting portion provided on a portion of the water tank parallel to the central axis and fitted with the communication portion, and the hot water heater is passed through the communication portion from the outside to the inside of the water tank. The fitting portion is attached by fitting with the communication portion,
The drum type washing machine according to any one of claims 1 to 3. The water heater further includes a holding member provided on a peripheral wall of the water tank, wherein a tip portion of the hot water heater is inserted to hold the hot water heater,
A guide portion for guiding the distal end portion of the hot water heater toward a center portion side of the holding member by hitting a distal end portion of the hot water heater when the hot water heater is inserted into the water tank through the communication portion; Having,
The drum type washing machine according to claim 4. The gap between the guide portion of the holding member and the separating member is set to a dimension that the hot water heater cannot be inserted,
The drum type washing machine according to claim 5 . The bottom portion of the water tank in which the hot water heater is installed is inclined so as to descend rearward at an inclination angle smaller than the inclination angle of the rotation center axis of the rotating tank with respect to the horizontal direction.
The drum type washing machine according to any one of claims 1 to 6 .

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