TW201937036A - Washing machine and heated water generation device - Google Patents

Abstract

The present invention is provided with: a housing; a water tub disposed in the housing; a washing tub rotatably disposed in the water tub; a motor which rotatably drives the washing tub; and a heating device which is disposed in the water tub and which heats a washing liquid. The heating device is attached to a mounting unit formed in the water tub, and the mounting unit has a first side surface that is substantially orthogonal to the direction of rotation of the washing tub during spin-drying and that is inclined toward the direction of rotation of the washing tub.

Description

Washing machine and heating water generating device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine and a heated water generating device that wash clothes and the like using warm water.

BACKGROUND OF THE INVENTION Conventionally, as such a washing machine, as disclosed in Japanese Laid-Open Patent Publication No. Hei. No. 2006-43100, there has been proposed a washing machine in which dirt is easily removed by raising the temperature of the washing liquid.

Fig. 15 is a cross-sectional view showing a conventional washing machine. In FIG. 15, a water supply port 62 is provided to supply water to the water tank 63, and a switching valve 66 branches the water supply path from the water supply port 62 to the water tank 63 into a main water path 64 and a bypass path 65. A heater 67 is provided in the middle of the bypass path 65.

However, in this configuration, there is a problem that the flow path for supplying the heated washing liquid to the water tank 63 becomes complicated.

Therefore, in order to solve this problem, as shown in FIG. 16, it is thought that the heater 72 is disposed at the bottom of the water tank 71.

Fig. 16 is a perspective view of a conventional water tank. In the water tank 71, a concave portion 73 is formed at the bottom, and the heater 72 is disposed to be located in the concave portion 73. A fixing portion 74 for fixing the heater 72 in the recess 73 is formed on the outer peripheral side of the bottom of the water tank 71.

SUMMARY OF THE INVENTION However, in the conventional configuration, a washing tub (not shown) is rotatably disposed in the water tank 71, and during the spin-drying operation, the washing tub is rotated in the direction of the arrow in Fig. 16, and the washing tub is used. The rotation causes a flow of the washing liquid in the direction of the arrow in Fig. 16.

Since the support portion of the heater 72 of the fixing portion 74 is formed in a direction orthogonal to the flow of the washing liquid, the washing liquid collides with the support portion of the heater 72 to cause turbulent flow, and thus the washing tub cannot rotate well to generate vibration. The problem. Or, there is a problem that the rotation resistance is increased due to the abnormality of the foam, and the dehydration is poor.

The present invention provides a washing machine capable of suppressing vibration or foam abnormality during dehydration operation.

The washing machine of the present invention comprises: a casing; a water tank disposed in the casing; a washing tank rotatably disposed in the water tank; a driving device that rotationally drives the washing tub; and a heating device disposed in the water tank and heating the washing liquid . The heating device is installed in a mounting portion formed in the water tank, and the mounting portion is formed by inclining the first side surface substantially perpendicular to the rotation direction of the washing tub during dehydration toward the rotation direction side of the washing tub.

According to this configuration, it is possible to provide a washing machine capable of suppressing vibration or foam abnormality during dehydration operation.

Form for implementing the invention
(First embodiment)
Hereinafter, the first embodiment of the present invention will be described with reference to the drawings. Further, the present invention is not an invention defined by the embodiment.

Fig. 1 is an exploded perspective view of the washing machine in the embodiment. Fig. 2 is a longitudinal sectional view of the washing machine in the embodiment.

The casing 1 is formed in a square shape having a front surface, both side surfaces, and a back surface, and an opening 2 is formed on the back side, and the opening 2 is closably opened by the door body 3. By disassembling the door body 3, it is possible to face the inside of the casing 1 from the opening 2.

In the present embodiment, since the opening 2 is formed on the back side of the casing 1, when the maintenance is performed, the casing 1 is rotated to a position where the inside of the casing 1 can be transported through the opening 2 to perform the casing 1 Internal maintenance. The door body 3 is disposed on the back side, so that when the washing machine is installed, it does not enter the user's field of view without damaging the appearance.

In the present embodiment, the opening 2 is formed on the back side of the casing 1, but may be formed on the side surface. When formed on the side, the amount of movement of the casing 1 can be reduced during maintenance, and inspection workability can be improved.

An upper casing 4 is mounted above the casing 1. In the space surrounded by the casing 1 and the upper casing 4, a bottomed cylindrical water tank 5 formed of a flame retardant synthetic resin is supported, and a rotation is arranged on the central axis of the water tank 5. Axis 6. A washing tub 7 coupled to the rotating shaft 6 is housed in the water tank 5. A pulsator 8 coupled to the rotating shaft 6 is disposed at the bottom of the washing tub 7. A motor 9 as a drive device is disposed below the water tank 5. A rotating shaft 6 is coupled to the motor 9, and the washing tub 7 and the pulsator 8 are rotationally driven by the motor 9.

On the upper surface of the water tank 5, an input port 10 for introducing laundry into the washing tub 7 is formed. The inlet port 10 is closably opened and closed by the lid body 11. An external input port (not shown) for introducing the laundry into the washing tub 7 is formed in the upper casing 4, and the outer inlet port is closably opened and closed by the outer lid 12.

The washing tub 7 is made of a metal having corrosion resistance. In the present embodiment, the washing tank 7 includes a cylindrical side wall 7a made of stainless steel and a bottom wall 7b made of a flame retardant synthetic resin, and the side wall 7a is provided. It is configured to be fixed integrally with the bottom wall 7b. The washing tub 7 is provided with a plurality of dewatering holes 13 in the side wall 7a, and a fluid balancer 14 for reducing the dehydration vibration is attached to the upper portion.

In the washing tub 7, a circulating water passage cover 15 is provided at a position facing the side wall 7a, and a circulation water passage (not shown) is formed between the side surface of the washing tub 7 and the circulating water passage cover 15. In the washing tub 7, two circulating water passages are formed to face each other by installing a pair of circulating water passage covers 15. In order to suppress the occurrence of imbalance when the washing tub 7 is rotated, the circulating water passage cover 15 and the circulating water passage are preferably formed in the same shape, but may be different in shape as needed.

In the circulating water passage cover 15, a discharge port 16 is formed at a position corresponding to the upper portion and the intermediate portion of the washing tub 7. The discharge port 16 may be formed only at any position corresponding to the upper portion or the intermediate portion of the washing tub 7.

A vane 8a is integrally formed on the lower surface side of the pulsator 8, and when the pulsator 8 is rotated by the motor 9, the washing water is pushed out toward the outer peripheral side by the centrifugal force of the vane 8a, and circulates in the circulating water passage, and The discharge port 16 of the circulating water passage discharges the washing liquid and sprays it into the washing tub 7.

At the bottom of the water tank 5, a concave portion 17 is formed in a substantially arc shape around the rotating shaft 6, and the bottom portion of the water tank 5 is formed to be inclined so as to gradually become lower toward the concave portion 17. In the recessed portion 17, a drain port 18 is formed at one end portion of the recessed portion 17, and the bottom surface of the recessed portion 17 is formed to be inclined so as to gradually become lower toward the drain port 18. The drain port 18 is formed in the recessed portion 17 at a position on the front side in the rotation direction when the washing tub 7 is dehydrated. In the present embodiment, the rotation direction when the washing tub 7 is dehydrated is a clockwise direction in a state in which the washing tub 7 is viewed from above, and is an arrow A direction shown in FIG.

In the recess 17 formed in the bottom of the water tank 5, the mounting portion 20 on which the heating device 19 is mounted is integrally formed to bulge upward from the bottom of the recess portion 17. The heating device 19 is a device for heating the washing water supplied into the water tank 5, and is constituted by a heater.

The mounting portion 20 of the heating device 19 is formed to extend across the recess 17 from the side surface of the water tank 5, and is formed to bulge upward from the bottom surface of the recess portion 17. The top surface of the mounting portion 20 is formed to have substantially the same height as the bottom surface of the water tank 5 or a height slightly higher than the bottom surface of the water tank 5. The mounting portion 20 has a first side surface 20a and a second side surface 20b. The first side surface 20a is substantially orthogonal to the arrow A of the rotation direction of the washing tub 7, and the second side surface 20b is substantially orthogonal to the first side surface 20a. The first side surface 20 a is configured to be inclined toward the rotation direction side of the washing tub 7 as it goes upward from the bottom surface side of the recess portion 17 . The second side surface 20b is formed in a substantially vertical planar shape, and a mounting opening portion 21 into which the heating device 19 is inserted from the outside of the water tank 5 is formed on the second side surface 20b (see FIGS. 7 and 8).

The heating device 19 forms the heating wire in a meandering shape, and fixes both end portions to the mounting plate 22 having an insulating and heat insulating function. A temperature sensor 23 composed of a thermistor is mounted on the mounting board 22, and the temperature of the heating device 19 is detected by the temperature sensor 23. The temperature sensor 23 is disposed at a substantially central position of both end portions of the heating wire, and is capable of accurately detecting the temperature of the heating device 19. A sealing member (not shown) is provided on the outer peripheral portion of the mounting plate 22, and the mounting plate 22 is watertightly attached to the peripheral edge of the mounting opening portion 21 of the second side surface 20b of the mounting portion 20 by a sealing member.

The water tank 5 is attached to the casing 1 in such a manner that the mounting opening portion 21 of the mounting portion 20 is located at a position facing the door body 3, and the door body 3 is the housing 1 The opening 2 is closably openable and closable. When the door body 3 is opened, the mounting opening portion 21 of the mounting portion 20 faces the opening 2 of the casing 1, and maintenance of the heating device 19 mounted on the mounting opening portion 21 can be performed.

A heat insulating plate 24 is disposed at a position below the heating device 19. The heat insulating plate 24 is made of stainless steel in the present embodiment, and is fixed to be spaced apart from the bottom surface of the concave portion 17 by a gap. status. By disposing the heat insulating plate 24 between the heating device 19 and the bottom surface of the concave portion 17, it is possible to suppress the heat generated by the heating device 19 from being directly transmitted to the concave portion 17, and it is possible to suppress thermal deterioration of the bottom portion of the water tank 5 in which the concave portion 17 is formed.

In the present embodiment, the heat insulating plate 24 is formed of stainless steel in order to have corrosion resistance, but may be other metal materials as long as the heat of the heating device 19 can be suppressed from being conducted toward the water tank 5, and is flame retardant or For non-combustible materials, materials other than metals, such as ceramics, can also be used.

A heating plate 25 is disposed above the heating device 19. The heating plate 25 is made of stainless steel in the present embodiment, and is disposed between the bottom surface of the washing tub 7 and the heating device 19. In the heating plate 25, a through hole 25a is formed in the center side of the water tank 5. The through hole 25a is formed at a position shifted from the upper position of the heating device 19, and the heating device 19 is configured to be covered by the heating plate 25. Since the heating device 19 is covered by the heating plate 25 and the heating plate 25 is disposed between the bottom surface of the washing tub 7 and the heating device 19, heat generated from the heating device 19 can be suppressed from being directly transmitted to the washing tub 7, and the washing tub can be suppressed. Thermal degradation at the bottom of 7.

The heating plate 25 is fixed by a plurality of ribs 26 (see FIG. 8) which are erected upward from the bottom surface of the recessed portion 17, and are spaced apart from the heating device 19. The heating plate 25 is mounted at substantially the same height as the bottom surface of the water tank 5 and the top surface of the mounting portion 20 of the heating device 19. Further, the heating plate 25 is installed so as to be gradually inclined toward the through hole 25a, and the washing liquid heated by the heating device 19 is efficiently guided to the through hole 25a by the inclination of the heating plate 25.

In the present embodiment, the heating plate 25 is set to have an inclination angle of 3 degrees with respect to the horizontal. In the washing machine of the present embodiment, the inclination allowed at the time of installation is set to 2 degrees with respect to the horizontal level, and when the washing machine is inclined by 2 degrees, the heating plate 25 is also inclined with respect to the ground contact surface.

The heating plate 25 is formed in a substantially rectangular shape. The side 25b of the heating plate 25 located on the second side face 20b side of the mounting portion 20 is attached to or in contact with the second side face 20b of the mounting portion 20. The side 25c of the heating plate 25 located on the outer peripheral side of the recessed portion 17 is in a state of being attached to or close to the outer peripheral side surface of the recessed portion 17. The side 25d of the heating plate 25 located on the center side of the recess 17 is in a state of being attached to or close to the center side surface of the recess 17. The side 25e of the heating plate 25 located on the side of the rotation direction of the washing tub 7 has a space between the side surface of the recessed portion 17. The side 25f of the heating plate 25 located between the center side surface of the recessed portion 17 and the second side surface 20b of the mounting portion 20 is formed in an arc shape, and is formed on the side surface of the center side of the recessed portion 17 and the second side surface 20b of the mounting portion 20. There is a gap between them.

In the heating plate 25, a through hole 25g is formed at a position above the temperature sensor 23. Since the washing liquid heated by the heating device 19 passes through the through hole 25g, the heated washing liquid does not stagnate around the temperature sensor 23, and the temperature sensor 23 can correctly detect the washing liquid. temperature.

In the vicinity of the heating device 19 of the recess 17, a circulation nozzle 32 is formed between the heat shield 24 and the side wall of the recess 17 (see Figs. 3, 8, and 9). The circulation nozzle 32 is connected to the circulation pump 27, and the circulation pump 27 is connected to one end of the circulation path 28 (refer to Fig. 3). The circulation path 28 is disposed outside the water tank 5, and the other end of the circulation path 28 is connected to the water injection port 29 formed in the vicinity of the input port 10. The washing liquid in the water tank 5 sucked from the circulating water port 32 flows through the circulation path 28 by the circulation pump 27, and is supplied to the laundry in the washing tank 7 from above through the water injection port 29.

The water injection port 29 is disposed above the discharge port 16 of the circulating water passage, and the circulation water passage is formed by the side wall 7a of the washing tub 7 and the circulating water passage cover 15. The circulation amount of the washing liquid caused by the circulation pump 27 is set to be larger than the circulation amount of the washing liquid of the circulating water passage. Thereby, the amount of the washing liquid supplied from the water injection port 29 is large, and it is supplied from a high position, and the supplied washing liquid collides with the laundry or the washing liquid in the washing tank 7 to be foamed, and then Washing with a large amount of foam and acting with dirt can improve the cleaning performance.

An operation display device 30 is disposed at the rear of the upper surface of the upper casing 4, and the operation display device 30 is operated to set various operation strokes, and the set operation stroke and the like are displayed. The control device 33 (refer to FIG. 1) is disposed at a position facing the opening 2 formed in the casing 1, and the operation stroke selected by the operation of the display device 30 is performed by the control device 33.

In the present embodiment, in the operation stroke executed by the control device 33, a stroke for heating the washing liquid to perform washing and a stroke for performing washing in a non-heating state of the washing liquid are provided.

Hereinafter, the operation and the action of the washing machine configured as described above will be described.

The outer cover 12 and the lid body 11 are opened, and the laundry is put into the washing tub 7 from the input port 10, and then the outer lid 12 and the lid body 11 are closed, and then the power switch (not shown) of the operation display device 30 is operated to turn on the power. . The operation display device 30 is operated to select an operation stroke or the like, and an activation switch (not shown) is operated to start the operation.

Once the operation starts, after detecting the amount of the laundry to be put in, the water supply device (not shown) will act to start the water supply, and the washing liquid will be supplied to the washing agent (not shown) together with the washing agent. Inside the sink 5.

After a predetermined amount of the washing liquid is stored in the water tank 5, the circulation pump 27 is actuated to inject the washing liquid from the water filling port 29 (see Fig. 3). Since the washing liquid from the water injection port 29 is supplied from a high position, it will collide with the laundry in the washing tub 7 to be foamed, and the foam will penetrate into the fiber depth of the washing material and be covered with dirt to make it dirty. Wash it off after floating.

The amount of water supplied to the water tank 5 is set in accordance with the amount of laundry to be put into the washing tub 7, and the water supply is stopped when the water level sensor (not shown) detects a predetermined water level, and the motor 9 is driven to The pulsator 8 alternately rotates forward and backward. The laundry in the washing tub 7 is stirred with the washing liquid by the rotation of the pulsator 8, and the laundry is washed.

During the washing step, the action of the circulation pump 27 continues. The blistering washing liquid is circulated, and the foam and dirt are acted upon, and the dirt can be removed efficiently.

The washing step is continued for a predetermined period of time, and after the washing step is completed, a drain valve (not shown) is opened and drained. When the drainage is over, dehydration will occur. The dehydration is performed by moving the washing tub 7 in one direction. In the present embodiment, the washing tub 7 is rotated at a high speed in the clockwise direction (the direction of the arrow A in Fig. 11) as viewed from above.

After the dehydration, the water supply device is actuated to supply a predetermined amount of water to the washing tub 7, and then the washing step is performed, followed by the dehydrating step to terminate the respective steps of washing.

When the stroke for heating the washing liquid to perform the washing is selected as the running stroke, in the washing step, the heating step of heating the washing liquid is performed. After the start of the operation, the amount of the laundry to be charged is detected, and the water in the water tank 5 is supplied in accordance with the amount of the laundry to be input. The water is supplied and the heating device 19 is energized to heat the washing liquid in the water tank 5.

The washing liquid heated by the heating device 19 moves to the upper side. The heating plate 25 located above the heating device 19 is inclined so as to gradually increase toward the through hole 25a side, so that the heated washing liquid is guided to the through hole 25a along the inclination of the heating plate 25. And moving from the through hole 25a to the upper side of the heating plate 25.

Since the washing liquid below the heating plate 25 moves toward the upper side of the heating plate 25, the low-temperature washing liquid flows from the periphery of the heating plate 25 toward the lower side of the heating plate 25. Since the side 25e of the heating plate 25 and the side 25f are spaced apart from the side surface of the recessed portion 17, the washing liquid flows into the lower side of the heating plate 25 from the substantially opposite sides of the heating plate 25, and the aforementioned side 25e is located in the washing. The side 25f is located between the side surface of the center side of the recessed portion 17 and the second side surface 20b in the rotation direction side of the groove 7. Since the washing liquid flows into the lower side of the heating plate 25 from the substantially opposite sides of the heating plate 25, the washing liquid is efficiently convected, and the washing liquid can be efficiently heated. Further, since the heating device 19 also heats the heating plate 25, the washing liquid is also heated by the heating plate 25 to increase the heating efficiency of the washing liquid.

Since the through hole 25a is formed in the upper side of the inclined surface in the heating plate 25, the heated washing liquid can be efficiently guided upward. Since the through hole 25a is formed at a position shifted from the upper position of the heating device 19 in the lateral direction, and the upper portion of the heating device 19 is covered by the heating plate 25, the foreign matter can be prevented from contacting the heating device by the heating plate 25. 19.

In the heating step, the washing liquid is heated by the heating device 19 and heated to a predetermined temperature suitable for washing, and in the present embodiment, it is heated to about 15 °C.

When the washing liquid reaches a certain temperature slightly lower than the predetermined temperature, the circulation pump 27 is actuated to circulate the washing liquid and supply it to the laundry from the water filling port 29. Since the heated washing liquid is circulated, the powder washing agent can be efficiently dissolved, and the dissolved residue of the powder washing agent can be suppressed, and the washing efficiency can be improved.

Since the washing liquid supplied from the water injection port 29 is supplied to the laundry from a high position, it collides with the laundry to cause foaming, and the foam penetrates into the laundry to wash away the dirt adhering to the deep portion of the fiber. Since the washing liquid is warmed, the enzyme of the lotion is activated, and the detergency can be improved.

When the washing liquid reaches a prescribed temperature, the pulsator 8 is alternately rotated forward and backward. The laundry in the washing tub 7 is stirred with the washing water by the rotation of the pulsator 8, and the laundry is washed. Since the washing liquid is heated and stirred, the dissolution residue of the powder lotion can be suppressed. In this state, the operation of the circulation pump 27 is continued to improve the washing efficiency.

When the pulsator 8 is rotated, the washing liquid is pushed out toward the outer peripheral side by the centrifugal force generated by the rotation of the vane 8a formed on the lower surface of the pulsator 8, and is covered by the side wall 7a of the washing tub 7 and the circulating water passage cover. The 15 formed circulating water passages rise and are sprayed from the discharge port 16 toward the laundry in the washing tub 7.

Since the washing liquid sprayed from the discharge port 16 to the laundry is heated to a predetermined temperature, the enzyme in the lotion is activated, and the stain of the fiber contaminated with the laundry can be efficiently washed.

As described above, when the stroke for heating the washing liquid to be washed is selected as the operation stroke, the heating step of heating the washing liquid is performed in the washing step. At this time, the heating device 19, the circulation pump 27, and the pulsator 8 operate as follows according to various conditions.

The washing liquid heated by the heating device 19 moves to the upper side. Along with this, the washing liquid having a low temperature moves to the lower side of the washing tub 7. At this time, the heating device 19 and the circulation pump 27 are simultaneously actuated, and the circulation pump 27 circulates the washing liquid having a low temperature at the bottom of the washing tank 7, and is supplied from the water filling port 29 into the washing tank 7. Thereby, the washing liquid in the upper portion and the lower portion in the washing tub 7 is mixed, and the temperature can be increased evenly.

When the amount of the laundry in the washing tub 7 is larger than the predetermined amount, the temperature difference of the washing liquid contained in the upper portion and the lower portion of the laundry in the washing tub 7 becomes large. On the contrary, when the amount of the laundry in the washing tub 7 is smaller than the predetermined amount, the temperature difference of the washing liquid contained in the upper portion and the lower portion of the laundry in the washing tub 7 becomes relatively small.

Therefore, when the amount of the laundry in the washing tub 7 is larger than the predetermined amount, the heating device 19 and the circulation pump 27 are simultaneously actuated, whereby the temperature of the washing liquid contained in the upper and lower clothes in the washing tub 7 can be averaged. . On the other hand, when the amount of the laundry in the washing tub 7 is smaller than the predetermined amount, only the heating device 19 is operated, whereby the temperature of the washing liquid contained in the laundry can be uniformly raised without using unnecessary electric power.

In the present embodiment, as a result of various experiments, the predetermined amount of the laundry is about 1/5 of the weight of the laundry to be washed and dehydrated. More specifically, the experiment was carried out using a washing machine having a washing and dehydrating capacity of 10 kg and 12 kg, and as a result, the predetermined amount was set to 2 kg.

When the amount of the washing liquid in the washing tank 7 is larger than the predetermined amount, the temperature difference between the upper portion and the lower portion of the washing liquid in the washing tank 7 becomes larger. On the contrary, when the amount of the washing liquid in the washing tub 7 is smaller than the predetermined amount, the temperature difference between the upper portion and the lower portion of the washing liquid in the washing tub 7 becomes relatively small.

Therefore, when the amount of the washing liquid in the washing tank 7 is larger than the predetermined amount, the heating device 19 and the circulation pump 27 are simultaneously actuated. Thereby, the washing water in the upper portion and the lower portion of the washing tub 7 is mixed, and the temperature can be increased evenly. On the other hand, when the amount of the washing liquid in the washing tub 7 is smaller than the predetermined amount, only the heating device 19 is operated, whereby the average temperature can be raised without using unnecessary electric power.

In the present embodiment, as a result of various experiments, the predetermined amount of the washing liquid is about 1/4 of the washing liquid required for washing and washing the laundry with the dehydration capacity. More specifically, it was tested using a washing machine having a washing and dehydrating capacity of 10 kg and 12 kg, and as a result, the predetermined amount was set to 30 L.

When the amount of the laundry to be washed is small and the amount of the washing liquid required for washing is small, the height of the laundry in the washing liquid in the washing tank 7 is sufficiently lower than that of the discharge port 16 located at the intermediate portion of the washing tub 7. When the pulsator 8 is moved in height, the washing liquid is discharged from the discharge port 16 located at the intermediate portion of the washing tub 7 and sprayed into the washing tub 7.

On the contrary, when the amount of the laundry to be washed is large and the amount of the washing liquid required for washing is large, the laundry in the washing liquid in the washing tank 7 is sufficiently higher than the discharge port 16 located at the intermediate portion of the washing tub 7 The height and the circulation pump 27 are actuated, and the washing liquid is sprayed from the water injection port 29 into the washing tub 7.

Therefore, when the amount of the laundry in the washing tub 7 is small, only the pulsator 8 is operated after the heating device 19 is operated, whereby the average temperature can be raised without using unnecessary electric power. Further, when the amount of the laundry in the washing tub 7 is large, the heating device 19 and the circulation pump 27 are simultaneously actuated, whereby the washing liquid in the upper portion and the lower portion of the washing tub 7 is mixed, and the temperature can be increased evenly.

After the washing step in the warm water is completed, the drain valve (not shown) is opened and drained. When the drainage is over, dehydration will occur. The dehydration is performed by moving the washing tub 7 in one direction. In the present embodiment, the washing tub 7 is rotated at a high speed in the clockwise direction as viewed from above.

After the dehydration, the water supply device is actuated to supply a predetermined amount of water to the washing tub 7, and then the washing step is performed, followed by the dehydrating step to terminate the respective steps of washing.

In the dehydration step, viewing from the top is performed by rotating the washing tub 7 at a high speed in the clockwise direction. By the rotation of the washing tub 7, the inside of the water tank 5 generates an air flow in the direction of the arrow A shown in Fig. 11, and the dehydrated washing liquid flows together with the air flow.

Since the first side surface 20a of the attachment portion 20 is inclined toward the rotation direction side of the washing tub 7 as it goes upward, the flow accompanying the rotation of the washing tub 7 is guided along the inclination of the first side surface 20a. Therefore, the first side surface 20a which is inclined toward the rotation direction side of the washing tub 7 can suppress the flow accompanying the rotation of the washing tub 7, and can suppress the occurrence of turbulence and suppress the occurrence of vibration.

The second side surface 20b is formed to be substantially vertical in order to mount the heating device 19. However, since the first side surface 20a is located on the downstream side of the flow accompanying the rotation of the washing tub 7, the first side surface 20b does not interfere with the flow and does not occur. Turbulence.

The upper surface of the heating device 19 is covered by the heating plate 25, and since the heating plate 25 is disposed at substantially the same height as the bottom surface of the water tank 5 and the top surface of the mounting portion 20, the flow of the washing liquid flowing in the water tank 5 is not hindered. , can suppress the generation of turbulence.

The bottom surface of the water tank 5 is inclined toward the concave portion 17, and the bottom surface of the concave portion 17 is inclined toward the water discharge port 18. In the draining step, the washing liquid in the water tank 5 flows toward the drain port 18. Since the heating device 19 is disposed at a position separated from the drain port 18, the washing liquid at a position opposed to the heating device 19 with respect to the rotating shaft 6 in the water tank 5 flows out of the drain port 18 without passing through the heating device 19. . Since the amount of the washing liquid that has passed through the heating device 19 is reduced, it is possible to suppress the lint contained in the washing liquid from adhering to the heating device 19.

In the case where a malfunction occurs in the heating device 19 or the like, when the heating device 19 needs to be serviced, first, the washing machine is rotated to a position facing the door body 3, and the door body 3 is detached from the casing 1. Since the heating device 19 is disposed at a position facing the opening 2 after the door body 3 is removed, the heating device 19 can be visually confirmed by disassembling the door body 3.

The heating device 19 can be detached from the water tank 5 by detaching the wiring from the terminals at both ends of the heating device 19 and detaching the fixing screws (not shown). After the heating device 19 is pulled out from the water tank 5, maintenance can be performed. When the heating device 19 is replaced with a new heating device 19, the new heating device 19 is inserted into the mounting opening portion 21 of the mounting portion 20 of the water tank 5, and the fixing screw is screwed to fix the heating device 19 to the water tank 5. Thereafter, the wiring is attached to the terminal of the heating device 19. Finally, the maintenance is terminated by attaching the door body 3 to the casing 1 and returning the washing machine to its original position.

The bottom surface of the water tank 5 is inclined so as to gradually become lower toward the water discharge port 18. The bottom surface of the water tank 5 and the bottom surface of the concave portion 17 are also formed so that the outer peripheral side becomes the highest. In the bottom surface of the water tank 5, reinforcing ribs 31 are formed on the outer side and also on the outer side surface of the concave portion 17. By increasing the outer peripheral side of the outer side surface of the concave portion 17, the height of the reinforcing rib 31 located on the outer side surface of the concave portion 17 can be made high, and the strength of the concave portion 17 can be improved.

The heating device 19 is disposed so as to be substantially parallel to the bottom surface of the recessed portion 17, and is disposed such that the side of the drain port 18 is lowered with respect to the horizontal plane. Since the heating device 19 is disposed substantially parallel to the bottom surface of the recessed portion 17, it is less likely to become a resistance to the drainage flowing toward the drain port 18, and it is possible to suppress the lint contained in the drain from being entangled in the heating device 19.

In the present embodiment, the opening 2 is formed on the back side of the casing 1, but may be formed on the side surface of the casing 1, and the heating device 19 may face the opening 2 on the side of the casing 1, and may also be open. 2 is formed in front of the casing 1 with the heating device 19 facing the opening 2 in front of the casing 1.

By arranging the opening 2 on the side or front of the casing 1, the amount of movement of the washing machine during maintenance can be reduced, and workability can be improved.
(Second embodiment)

FIG. 13 is an enlarged plan view showing a main part of the washing tub of the washing machine in the second embodiment of the present invention as seen from above. Fig. 14 is a cross-sectional view showing the main part of a washing tub of the washing machine in the second embodiment of the present invention.

In the present embodiment, the heater plate 35 having a shape different from that of the heating plate 25 of the first embodiment is used, and the position of the drain port 18 is the same as that of the first embodiment. Therefore, the same components as those of the first embodiment are added. The same symbols are used and the description thereof is omitted.

A heating plate 35 is disposed at a position above the heating device 19. The heating plate 35 is made of a metal, and in the present embodiment, is formed of stainless steel, and the heating device 19 is configured to be covered by the heating plate 35. Since the heating device 19 is covered by the heating plate 35, it is possible to suppress the heat generation from the heating device 19 from being directly transmitted to the washing tub 7, and it is possible to suppress thermal deterioration of the bottom portion of the washing tub 7.

The heating plate 35 is formed in a substantially rectangular shape. The side 35b of the heating plate 35 located on the second side face 20b side of the mounting portion 20 is attached to or in contact with the second side face 20b of the mounting portion 20. The side 35c of the heating plate 35 located on the outer peripheral side of the recessed portion 17 is in a state of being attached to or close to the outer peripheral side surface of the recessed portion 17. The side 35d of the heating plate 35 located on the center side of the concave portion 17 is in a state of being attached to or close to the center side surface of the concave portion 17. An arcuate notch portion 35h is formed in the side 35c of the heating plate 35 and the side 35d, and the washing liquid is convected by the notch portion 35h. The side 35e of the heating plate 35 on the side of the rotation direction of the washing tub 7 is spaced apart from the side of the recessed portion 17.

The heating plate 35 is installed to be inclined so as to become gradually higher toward the side 35e, and the washing liquid heated by the heating device 19 is efficiently guided to the side 35e by the inclination of the heating plate 35.

In the present embodiment, the heating plate 35 has an inclination angle of 3 degrees with respect to the horizontal. In the washing machine of the present embodiment, the inclination allowed at the time of installation is set to 2 degrees with respect to the horizontal level, and when the washing machine is inclined by 2 degrees, the heating plate 35 is also inclined with respect to the ground contact surface.

In the heating plate 35, a through hole 35g is formed at a position above the temperature sensor 23. Since the washing liquid heated by the heating device 19 passes through the through hole 35g, the heated washing liquid does not stagnate around the temperature sensor 23, and the temperature sensor 23 can correctly detect the washing liquid. temperature.

When the stroke for heating the washing liquid to perform the washing is selected as the running stroke, water is supplied and the heating device 19 is energized to heat the washing liquid in the water tank 5.

The washing liquid heated by the heating device 19 moves to the upper side. The heating plate 35 located above the heating device 19 is disposed so as to be gradually inclined toward the side of the side 35e, so that the heated washing liquid is guided along the heating plate 35 to the side 35e, and from the side 35e The side moves to the upper side of the heating plate 35.

Since the washing liquid below the heating plate 35 moves toward the upper side of the heating plate 35, the low-temperature washing liquid flows from the periphery of the heating plate 35 toward the lower side of the heating plate 35. Since the heating plate 35 has the notch portion 35h formed in the side 35c and the side 35d, the washing liquid flows into the lower side of the heating plate 35 through the notch portion 35h from the two sides of the heating plate 35 which are substantially opposite sides, that is, the side 35c and the side 35d. Since the washing liquid flows from the substantially opposite sides of the heating plate 35, that is, the side 35c and the side 35d, into the lower side of the heating plate 35, the washing liquid is efficiently convected, and the washing liquid can be efficiently heated. Further, since the heating device 19 also heats the heating plate 35, the washing liquid is also heated by the heating plate 35 to increase the heating efficiency of the washing liquid.

Since the heating plate 35 is disposed obliquely, the washing liquid heated by the heating plate 35 can be efficiently guided to the upper side. Since the upper portion of the heating device 19 is covered by the heating plate 35, the foreign matter can be prevented from contacting the heating device 19 by the heating plate 35.

When the water tank 5 is viewed from above, since the water discharge port 18 is disposed at a position separated from the side 35e of the heating plate 35, the drain water is guided to the water discharge port 18 by the heating plate 35, and the lint contained in the drain can be suppressed from being entangled in the drain. Heating device 19.

As described above, the washing machine according to the first aspect of the invention includes: a casing; a water tank disposed in the casing; the washing tub being rotatably disposed in the water tank; the driving device rotating the washing tub; and the heating device being disposed The washing liquid is heated in the water tank. The heating device is installed in a mounting portion formed in the water tank, and the mounting portion is formed by inclining the first side surface substantially perpendicular to the rotation direction of the washing tub during dehydration toward the rotation direction side of the washing tub.

According to this configuration, in the spin-drying step, when the washing tub is rotated, the airflow is generated in the water tank due to the rotation of the washing tub, and the dehydrated washing liquid flows together with the airflow. Since the first side surface of the attachment portion of the heating device is inclined toward the rotation direction side of the washing tub, the flow accompanying the rotation of the washing tub is guided along the inclination of the first side surface, thereby suppressing the flow from being blocked and suppressing the disorder. The flow is generated and the generation of vibration is suppressed.

In the first aspect of the invention, in the washing machine according to the first aspect of the invention, the attachment opening portion into which the heating device can be inserted may be formed on the second side surface of the attachment portion that is substantially perpendicular to the first side surface.

According to this configuration, the second side surface is formed to be substantially vertical for the purpose of installing the heating device. However, since the first side surface is located on the downstream side of the flow accompanying the rotation of the washing tub, the flow does not hinder the flow and does not occur. Produce turbulent flow.

According to a third aspect of the invention, in the first aspect of the invention, the water supply port is formed in the water tank, and the bottom surface of the water tank is gradually lowered toward the water discharge port, and the heating device is disposed substantially in the bottom surface of the water tank. Parallel can also be.

According to this configuration, since the heating device is disposed substantially parallel to the bottom surface of the water tank, the heating device is less likely to be a resistance to the drainage flowing toward the drain port, and the lint contained in the drain can be prevented from being entangled in the heating device.

According to a fourth aspect of the invention, in the first aspect of the invention, the heat insulating panel may be disposed between the bottom surface of the water tank and the heating device, and the heat insulating panel may transmit the heating device to the bottom surface of the water tank. Heat is used to insulate.

According to this configuration, it is possible to suppress the heat generated by the heating device from being directly transmitted to the bottom surface of the water tank, and it is possible to suppress thermal deterioration of the bottom portion of the water tank.

In the washing machine according to the fifth aspect of the invention, the heating device may be disposed between the bottom surface of the washing tub and the heating device, and the heating plate may cover the upper portion of the heating device.

According to this configuration, it is possible to suppress the heat generation of the heating device from being directly transmitted to the bottom surface of the washing tub, and it is possible to suppress thermal deterioration of the bottom portion of the washing tub.

Further, since the upper portion of the heating device is covered by the heating plate, the flow of the washing liquid flowing in the water tank is not hindered by the heating device, and the occurrence of turbulent flow can be suppressed.

A washing machine according to a sixth aspect of the invention includes a casing, a water tank disposed in the casing, a washing tub rotatably disposed in the water tank, a driving device that rotationally drives the washing tub, and a drain port formed on the bottom surface of the water tank and in the water tank The washing liquid is drained; and the heating device is disposed at the bottom of the water tank and heats the washing liquid. The drain port and the heating mechanism are disposed at separate positions.

With this configuration, the washing liquid at the position separated from the heating device flows out from the drain port without passing through the heating device. Since the amount of the washing liquid that has passed through the heating device is reduced, it is possible to suppress the lint contained in the washing liquid from adhering to the heating device.

In the washing machine according to the seventh aspect of the invention, in particular, the heat insulating plate may be disposed between the bottom surface of the water tank and the heating device, and the heat insulating plate may insulate the heat generated by the heating device transmitted from the bottom surface of the water tank.

According to this configuration, it is possible to suppress the heat generated by the heating device from being directly transmitted to the bottom surface of the water tank, and it is possible to suppress thermal deterioration of the bottom portion of the water tank.

In the washing machine according to the eighth aspect of the invention, in the sixth aspect of the invention, the heating plate may be disposed between the bottom surface of the washing tub and the heating device, and the heating plate may cover the upper portion of the heating device.

According to this configuration, since the upper surface of the heating device is covered by the heating plate, the flow of the washing liquid flowing through the water tank is not hindered, and the occurrence of turbulent flow can be suppressed.

A washing machine according to a ninth aspect of the invention includes: a casing; a water tank disposed in the casing; the washing tub being rotatably disposed in the water tank; a driving device that rotationally drives the washing tub; and a heating device disposed in the water tank and heated to wash liquid. The casing has an opening that is closably opened and closed by the door body, and a mounting portion to which the heating device can be attached is provided in the water tank, and a mounting opening portion is formed at a position where the mounting portion faces the opening, and the mounting opening portion is for heating The device is inserted into the sink from the outside of the sink.

According to this configuration, when there is a problem in the heating device or the like, when the heating device needs to be serviced, the washing device is rotated to the position facing the door body, and the door body is detached from the casing, and the heating device is disposed on the surface. The position of the opening after the door body is removed, so that the maintenance of the heating device can be performed by disassembling the door body.

In the washing machine according to a tenth aspect of the invention, in the ninth aspect of the invention, the opening may be formed on the back surface of the casing.

According to this configuration, in the installed state of the washing machine, the door body is not visible, and the appearance is not impaired.

In the washing machine according to the eleventh aspect of the invention, in the ninth aspect of the invention, the opening may be formed on the side surface of the casing.

According to this configuration, the amount of movement of the washing machine during maintenance can be reduced, and workability can be improved.

In a washing machine according to a twelfth aspect of the invention, in the invention of any of the ninth to eleventh invention, the heat insulating plate may be disposed between the bottom surface of the water tank of the washing machine and the heating device, and the heat insulating plate may transmit the bottom surface of the water tank. The heat of the heating device is insulated.

According to this configuration, it is possible to suppress the heat generated by the heating device from being directly transmitted to the bottom surface of the water tank, and it is possible to suppress thermal deterioration of the bottom portion of the water tank.

In the washing machine according to the thirteenth aspect of the invention, the heating device may be disposed between the bottom surface of the washing tub and the heating device, and the heating plate may cover the upper portion of the heating device.

According to this configuration, since the upper surface of the heating device is covered by the heating plate, the flow of the washing liquid flowing through the water tank is not hindered, and the occurrence of turbulent flow can be suppressed.

A heated water generator according to a fourteenth aspect of the present invention includes: a water tank; a heating device disposed at a bottom portion of the water tank to heat the liquid in the water tank; a temperature sensor disposed in the heating device; and a heating plate disposed at a position above the heating device Cover the heating device. The heating plate forms a through hole at a substantially upper position of the temperature sensor.

According to this configuration, the warm water heated by the heating means transmits heat to the entire water tank through the heating plate, and heat deterioration due to direct thermal damage to other materials can be suppressed.

Further, the warm water heated by the heating means is not disturbed by the heating plate at the position above the temperature sensor, and can flow to the upper side through the through hole, so that stable temperature detection can be performed.

A washing machine according to a fifteenth aspect of the invention is the washing machine comprising the heated water generating device according to the fourteenth aspect of the invention.

According to this configuration, the warm water heated by the heating means transmits heat to the entire water tank through the heating plate, and heat deterioration due to direct thermal damage to other materials can be suppressed.

Further, the warm water heated by the heating means is not disturbed by the heating plate at the position above the temperature sensor, and can flow to the upper side through the through hole, so that stable temperature detection can be performed.

A washing machine according to a sixteenth aspect of the present invention includes: a casing; a water tank disposed in the casing; the washing tub being rotatably disposed in the water tank; the pulsator being rotatably disposed at an inner bottom of the water tank; and a driving device that rotationally drives the washing a tank and a pulsator; a circulation path connected to the washing tank to allow water in the washing tank to circulate; and a circulation pump to form a water flow in the circulation path. A heating device is disposed in the water tank and heats the washing liquid; and a control device controls the driving device, the circulation pump, and the heating device. The control device causes the circulation pump to operate simultaneously with the heating device.

According to this configuration, the washing liquid having a low temperature at the bottom of the washing tub is circulated by the circulation pump, and is supplied into the washing tub from the water filling port. By this action, the washing water in the upper portion and the lower portion of the washing tank are mixed, and the temperature can be increased evenly.

According to a sixteenth aspect of the invention, in the sixteenth aspect of the invention, when the amount of water in the washing tank is larger than a predetermined amount, the circulation pump and the heating device are simultaneously operated, and the amount of water in the washing tank is larger than a predetermined amount. When there is little time, only the heating device may be operated.

According to this configuration, when the amount of the washing liquid in the washing tank is larger than the predetermined amount, the heating device and the circulation pump are simultaneously actuated, whereby the washing water in the upper portion and the lower portion of the washing tank are mixed, and the temperature can be increased evenly. Moreover, when the amount of the washing liquid in the washing tank is smaller than the predetermined amount, only the heating device is operated, whereby the temperature of the washing water can be uniformly raised without using unnecessary electric power.

According to a still further aspect of the present invention, in the washing machine of the present invention, the control device is configured to simultaneously operate the circulation pump and the heating device when the amount of the laundry in the washing tub is larger than a predetermined amount, and in the washing tub When the amount of laundry inside is smaller than a predetermined amount, only the heating device may be operated.

According to this configuration, when the amount of the laundry in the washing tub is larger than the predetermined amount, the heating device and the circulation pump are simultaneously actuated, whereby the temperature of the washing liquid contained in the upper portion and the lower portion of the laundry can be averaged. Further, when the amount of the laundry in the washing tub is smaller than the predetermined amount, only the heating device is operated, whereby the temperature of the washing water contained in the laundry can be uniformly raised without using unnecessary electric power.

A washing machine according to a nineteenth aspect of the present invention, wherein the control device has a small amount of water in the washing tank, wherein the amount of water in the washing tank is smaller than a predetermined amount, When the pulsator is operated only after the heating device is energized, and the amount of water in the washing tub is larger than a predetermined amount, the circulation pump can be operated while energizing the heating device.

According to this configuration, when the amount of the washing liquid in the washing tub is smaller than the predetermined amount, only the pulsator is operated after the heating device is operated, whereby the average temperature can be raised without using unnecessary electric power. Further, when the amount of the washing liquid in the washing tank is larger than the predetermined amount, the heating device and the circulation pump are simultaneously actuated, whereby the washing water in the upper portion and the lower portion of the washing tank are mixed, and the temperature can be increased evenly.

According to a still further aspect of the present invention, in the sixth aspect of the invention, the control device, when the amount of the laundry in the washing tub is smaller than a predetermined amount, causes the pulsator to operate only after the heating device is energized, and When the amount of the laundry in the washing tub is larger than the predetermined amount, the circulation pump is operated while energizing the heating device.

According to this configuration, when the amount of the laundry in the washing tub is smaller than the predetermined amount, only the pulsator is operated after the heating device is operated, whereby the average temperature can be increased without using unnecessary electric power. Further, when the amount of the laundry in the washing tub is larger than the predetermined amount, the heating device and the circulation pump are simultaneously actuated, whereby the washing water in the upper portion and the lower portion of the washing tub are mixed, and the temperature can be increased evenly.

A washing machine according to a twenty-first aspect of the present invention includes: a casing; a water tank disposed in the casing; the washing tub being rotatably disposed in the water tank; a driving mechanism that rotationally drives the washing tub; and a heating device disposed in the water tank and heating the water tank The washing liquid; and the circulation path, the washing liquid in the water supply tank is circulated from above to the washing tank. A circulation nozzle leading to the circulation path is formed at the bottom of the sink.

According to this configuration, the washing liquid at the bottom of the water tank heated by the heating device can be circulated toward the upper portion of the water tank, so that the entire washing liquid in the water tank can be efficiently heated, and uneven washing can be reduced, and the dirt can be easily prevented. Remove.

In the washing machine according to the twenty-second aspect of the invention, in the twenty-first aspect of the invention, the circulation nozzle may be formed in the vicinity of the heating device.

According to this configuration, the washing liquid heated by the heating device can be efficiently guided to the circulation path.

According to a twenty-third aspect of the invention, the washing machine according to the twenty-first aspect of the invention, wherein the circulation nozzle is formed to protrude upward from the bottom surface of the water tank toward the heating device.

As the washing liquid heated by the heating device moves upward, the washing liquid having a relatively low temperature flows in from the surroundings. However, by this configuration, the circulating water nozzle is formed to protrude upward from the bottom surface of the water tank toward the heating device, so that it can be formed. The washing liquid heated by the heating device is efficiently guided to the circulation path.

As described above, since the washing machine of the present invention can suppress the occurrence of vibration during the dehydration operation, it can be applied to applications such as a laundry dryer or a business washing machine.

1‧‧‧shell

2‧‧‧ openings

3‧‧‧

4‧‧‧Upper casing

5‧‧‧Sink

6‧‧‧Rotary axis

7‧‧‧washing trough

7a‧‧‧ sidewall

7b‧‧‧ bottom wall

8‧‧‧ pulsator

8a‧‧‧ leaves

9‧‧‧Motor (drive unit)

10‧‧‧ Input

11‧‧‧ Cover

12‧‧‧ Cover

13‧‧‧Dehydration hole

14‧‧‧Fluid balancer

15‧‧‧Circulating waterway cover

16‧‧‧Exporting

17‧‧‧ recess

18‧‧‧Drainage

19‧‧‧ heating device

20‧‧‧Installation Department

20a‧‧‧1st side

20b‧‧‧2nd side

21‧‧‧Installation opening

22‧‧‧Installation board

23‧‧‧ Temperature Sensor

24‧‧‧ Thermal insulation board

25, 35‧‧‧ heating plate

25a‧‧‧through hole

25b, 25c, 25d, 25e, 25f, 35b, 35c, 35d, 35e‧‧

25g, 35g‧‧‧through hole

26‧‧‧ rib

27‧‧‧Circulating pump

28‧‧‧Circular Road

29‧‧‧Water inlet

30‧‧‧Operation display device

31‧‧‧ reinforcing ribs

32‧‧‧Circulation nozzle

33‧‧‧Control device

35h‧‧‧Gap section

62‧‧‧Water supply port

63, 71‧‧‧ sink

64‧‧‧Main waterway

65‧‧‧bypass path

66‧‧‧Switching valve

67‧‧‧heater

72‧‧‧heater

73‧‧‧ recess

74‧‧‧ Fixed Department

A‧‧‧ arrow

FIG. 1 is an exploded perspective view showing a state in which a door body of the washing machine according to the first embodiment of the present invention is detached as seen from the back side.

Fig. 2 is a cross-sectional view showing the washing machine in the first embodiment of the present invention.

3 is a cross-sectional view showing a circulating state of the washing liquid of the washing machine in the first embodiment of the present invention.

Fig. 4 is a plan view of the water tank of the washing machine in the first embodiment of the present invention as seen from above.

Fig. 5 is an enlarged view of a main part of a water tank of the washing machine in the first embodiment of the present invention.

FIG. 6 is a plan view of the water tank in a state in which the hot plate of the water tank of the washing machine according to the first embodiment of the present invention is removed, as seen from above.

Fig. 7 is a sectional view taken along line 7-7 of Fig. 6.

Fig. 8 is an enlarged plan view showing the main part of the water tank of the washing machine in the first embodiment of the present invention.

Fig. 9 is an enlarged cross-sectional view showing the main part of the water tank of the washing machine in the first embodiment of the present invention.

FIG. 10 is a perspective view of the water tank of the washing machine in the first embodiment of the present invention as seen from below.

FIG. 11 is a perspective view of the water tank of the washing machine in the first embodiment of the present invention as seen from above.

FIG. 12 is an enlarged plan view showing a main part of the water tank of the washing machine in the first embodiment of the present invention as seen from above.

FIG. 13 is an enlarged plan view showing a main part of the water tank of the washing machine in the second embodiment of the present invention as seen from above.

Fig. 14 is an enlarged cross-sectional view showing the main part of the water tank of the washing machine in the second embodiment of the present invention.

Fig. 15 is a cross-sectional view showing a conventional washing machine.

Fig. 16 is a perspective view of a conventional water tank of a washing machine.

Claims (23)

A washing machine characterized in that: have: case; a water tank disposed in the foregoing housing; The washing tub is rotatably disposed in the water tank; a driving device that rotationally drives the washing tub; and a heating device disposed in the water tank and heating the washing liquid, Further, the heating device is installed in a mounting portion formed in the water tank, and the mounting portion is formed by inclining a first side surface that is substantially perpendicular to a rotation direction of the washing tub during dehydration toward a rotation direction side of the washing tub. . The washing machine of claim 1, wherein the mounting portion forms a mounting opening of the heating device on a second side surface that is substantially perpendicular to the first side surface. The washing machine according to claim 1 or 2, wherein the water tank forms a drain port, and the bottom surface of the water tank is formed to gradually decrease toward the drain port, and the heating device is disposed substantially parallel to the bottom surface of the water tank. A washing machine according to claim 1 or 2, wherein a heat insulating plate is disposed between the bottom surface of the water tank and the heating device, and the heat insulating plate heats heat generated by the heating device transmitted from the bottom surface of the water tank. A washing machine according to claim 1 or 2, wherein a heating plate is disposed between the bottom surface of the washing tub and the heating device, and the heating plate covers the upper side of the heating device. A washing machine characterized in that: have: case; a water tank disposed in the foregoing housing; The washing tub is rotatably disposed in the water tank; a driving device that rotationally drives the aforementioned washing tub; a drain port formed on the bottom surface of the water tank and draining the washing liquid in the water tank; and a heating device is disposed at the bottom of the water tank and heats the washing liquid. Further, the drain port and the heating device are disposed at separate positions. The washing machine according to claim 6, wherein a heat insulating plate is disposed between the bottom surface of the water tank and the heating device, and the heat insulating plate heats heat generated by the heating device transmitted from the bottom surface of the water tank. A washing machine according to claim 6 or 7, wherein a heating plate is disposed between the bottom surface of the washing tub and the heating device, and the heating plate covers the upper portion of the heating device. A washing machine characterized in that: have: case; a water tank disposed in the foregoing housing; The washing tub is rotatably disposed in the water tank; a driving device that rotationally drives the washing tub; and a heating device disposed in the water tank and heating the washing liquid, Further, the casing has an opening that is closably opened and closed by a door body, and a mounting portion to which the heating device can be attached is provided in the water tank, and the mounting portion forms a mounting opening at a position facing the opening. The mounting opening is such that the heating device is inserted into the water tank from the outside of the water tank. A washing machine according to claim 9, which forms the aforementioned opening on the back surface of the aforementioned casing. A washing machine according to claim 9, which forms the aforementioned opening on a side surface of the aforementioned casing. The washing machine according to any one of claims 9 to 11, wherein a heat insulating plate is disposed between the bottom surface of the water tank and the heating device, and the heat insulating plate heats heat generated by the heating device transmitted from the bottom surface of the water tank. The washing machine according to any one of claims 9 to 11, wherein a heating plate is disposed between the bottom surface of the washing tub and the heating device, and the heating plate covers the upper side of the heating device. A heated water generating device having: sink; a heating device disposed at the bottom of the water tank and heating the liquid in the water tank; a temperature sensor disposed in the foregoing heating device; and The heating plate is disposed to cover the heating device at a position above the heating device, and the heating plate has a through hole formed at a substantially upper position of the temperature sensor. A washing machine having: case; a water tank disposed in the foregoing housing; The washing tub is rotatably disposed in the water tank; a driving device that rotationally drives the aforementioned washing tub; a water supply device that supplies a washing liquid to the water tank; a heating device disposed at the bottom of the water tank and heating the washing liquid; a temperature sensor disposed in the foregoing heating device; and The heating plate is disposed to cover the heating device at a position above the heating device, and the heating plate has a through hole formed at a substantially upper position of the temperature sensor. A washing machine characterized in that: have: case; a water tank disposed in the foregoing housing; The washing tub is rotatably disposed in the water tank; a pulsator that is rotatably disposed at an inner bottom of the washing tub; a motor that rotationally drives the washing tub and the pulsator; a circulation path for circulating the washing liquid in the washing tank; a circulation pump that forms a flow of the washing liquid in the aforementioned circulation path; a heating device disposed in the water tank and heating the washing liquid; The control device controls the motor, the circulation pump, and the heating device, and the control device causes the circulation pump to operate simultaneously with the heating device. The washing machine of claim 16, wherein the amount of water in the washing tank is higher than a predetermined amount, and the circulation pump and the heating device are simultaneously operated, and the amount of water in the washing tank is prescribed. When the amount is small, only the heating device is operated. The washing machine of claim 16 or 17, wherein when the amount of the laundry in the washing tank is larger than a predetermined amount, the circulation pump and the heating device are simultaneously operated, and the amount of laundry in the washing tank is relatively When the predetermined amount is small, only the heating device is operated. The washing machine of claim 16 or 17, which has a discharge port located at an intermediate portion of the washing tub, and wherein the amount of water in the washing tank is smaller than a predetermined amount, the control device is only energized after the heating device is energized When the pulsator is operated and the amount of water in the washing tank is larger than a predetermined amount, the circulation pump is operated while energizing the heating device. The washing machine of claim 16 or 17, wherein when the amount of the laundry in the washing tank is less than a predetermined amount, the control device operates the pulsator after energizing the heating device, and is in the washing tank. When the amount of the laundry is larger than the predetermined amount, the circulation pump is operated while energizing the heating device. A washing machine having: case; a water tank disposed in the foregoing housing; The washing tub is rotatably disposed in the water tank; a driving device that rotationally drives the aforementioned washing tub; a heating device disposed in the water tank and heating the washing liquid in the water tank; and a circulation path for circulating the washing liquid in the water tank from above to the washing tank, Further, a circulation nozzle leading to the circulation path is formed at the bottom of the water tank. A washing machine according to claim 21, wherein said circulation nozzle is formed in the vicinity of said heating means. The washing machine of claim 21 or 22, wherein the circulation nozzle is formed to protrude upward from the bottom surface of the water tank toward the heating device.