TWI753226B - washing machine - Google Patents

Abstract

The present invention includes: a casing; a water tank arranged in the casing; a washing tank rotatably arranged in the water tank; a motor for rotationally driving the washing tank; 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 substantially orthogonal to the rotation direction of the washing tank during dehydration toward the rotation direction side of the washing tank.

Description

washing machine

Field of Invention

The present invention relates to a washing machine and a heated water generating device for washing clothes and the like using warm water.

Background of the Invention

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

Fig. 15 is a cross-sectional view of a conventional washing machine. 15 includes a water supply port 62 for supplying water to the water tank 63 and a switching valve 66 for branching 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.

Then, in order to solve this problem, as shown in FIG. 16, it is thought to arrange|position the heater 72 in the bottom part of the water tank 71.

Fig. 16 is a perspective view of a conventional water tank. In the water tank 71, the recessed part 73 is formed in the bottom part, and the heater 72 is arrange|positioned so that it may be located in the recessed part 73. On the outer peripheral side of the bottom of the water tank 71 , a fixing portion 74 for fixing the heater 72 in the recessed portion 73 is formed.

Summary of Invention

However, in the conventional configuration, a washing tub (not shown) is rotatably arranged in the water tub 71, and during the spin-drying operation, the washing tub rotates in the direction of the arrow in FIG. 16, and the rotation of the washing tub On the other hand, the flow of the washing liquid occurs in the direction of the arrow in FIG. 16 .

Since the support part of the heater 72 of the fixing part 74 is formed in a direction perpendicular to the flow of the washing liquid, the washing liquid will collide with the support part of the heater 72 and generate turbulent flow, so that the washing tank cannot rotate well and vibrates. The problem. Or, there is a problem that the rotation resistance is enlarged due to abnormal generation of foam, resulting in poor dehydration.

The present invention provides a washing machine capable of suppressing abnormal generation of vibration and foam during spin-drying operation.

The washing machine of the present invention comprises: a casing; a water tank arranged in the casing; a washing tub rotatably arranged in the water tub; a driving device for rotationally driving the washing tub; and a heating device arranged in the water tub 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 a first side surface substantially orthogonal to the rotation direction of the washing tank during dehydration toward the rotation direction side of the washing tank.

With this configuration, it is possible to provide a washing machine that can suppress vibration during spin-drying operation or abnormal generation of foam.

1: Shell

2: Opening

3: door body

4: Upper shell

5: Sink

6: Rotary axis

7: Sink

7a: Sidewall

7b: Bottom wall

8: Pulsator

8a: Blades

9: Motor (drive device)

10: Input port

11: Cover

12: Outer cover

13: Dehydration hole

14: Fluid Balancer

15: Circulating water channel cover

16: Spit out

17: Recess

18: drain

19: Heating device

20: Installation Department

20a: 1st side

20b: Side 2

21: Mounting the opening

22: Mounting plate

23: Temperature sensor

24: Insulation board

25, 35: heating plate

25a: Through hole

25b, 25c, 25d, 25e, 25f, 35b, 35c, 35d, 35e: Edge

25g, 35g: through hole

26: Ribs

27: Circulation pump

28: Circular Road

29: water injection port

30: Operation display device

31: Reinforcing ribs

32: Circulating water port

33: Controls

35h: Gap

62: Water supply port

63, 71: Sink

64: Main Waterway

65: Bypass Path

66: Switching valve

67: Heater

72: Heater

73: Recess

74: Fixed part

A: Arrow

Fig. 1 is an exploded perspective view of a state in which the door of the washing machine in the first embodiment of the present invention has been removed as seen from the back side.

Fig. 2 is a cross-sectional view of 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 in the washing machine according to 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 viewed from above.

Fig. 5 is an enlarged view of a main part of the 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 where the heating plate of the water tank of the washing machine in the first embodiment of the present invention is viewed from above.

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

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

9 is an enlarged cross-sectional view of a 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 viewed 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 viewed from above.

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

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

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

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

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

Form for carrying out the invention

(first embodiment)

Hereinafter, the first embodiment of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

Fig. 1 is an exploded perspective view of the washing machine in the present embodiment as viewed from the back. Fig. 2 is a longitudinal sectional view of the washing machine in the present embodiment.

The casing 1 is formed in a mouth shape having a front surface, two side surfaces, and a back surface, an opening 2 is formed on the back surface side, and the opening 2 is closed by a door body 3 so as to be openable and closable. By disassembling the door body 3 , the inside of the housing 1 can be faced from the opening 2 .

In the present embodiment, since the opening 2 is formed on the back side of the casing 1, when maintenance is performed, the casing 1 is rotated to a position where the interior of the casing 1 can be maintained through the opening 2, so that the casing 1 can be maintained. Internal maintenance. The door body 3 is disposed on the back side, so that when the washing machine is installed, it will not enter the user's field of vision, and the appearance will not be damaged.

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

An upper casing 4 is installed 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. Inside the water tub 5, a washing tub 7 connected to the rotating shaft 6 is housed. A pulsator 8 connected to the rotating shaft 6 is disposed at the bottom of the washing tub 7 . Below the water tank 5, a motor 9, which is a driving device, is arranged. The rotary shaft 6 is connected 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 tub 5, there is formed an inlet 10 for introducing the laundry into the washing tub 7. As shown in FIG. The input port 10 is openably and closably closed by the cover body 11 . The upper casing 4 is formed with an outer inlet (not shown) for throwing the laundry into the washing tub 7 , and the outer inlet is closed by the outer cover 12 so as to be freely openable and closable.

The washing tub 7 is made of a metal having corrosion resistance, and in this embodiment, is provided with a cylindrical side wall 7a formed of stainless steel and a bottom wall 7b formed of a flame-retardant synthetic resin, and the side wall 7a It is integrally fixed with the bottom wall 7b. The washing tank 7 is provided with a plurality of dewatering holes 13 in the side wall 7a, and an annular fluid balancer 14 for reducing dewatering 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 circulating 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 channels are formed to face each other by installing a pair of circulating water channel covers 15. In order to suppress the unbalance occurring when the washing tub 7 rotates, the circulating water passage is covered. 15 and the circulating water channel are preferably formed in the same shape, but the shape may be different according to needs.

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

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

In the bottom of the water tank 5 , a recessed portion 17 is formed in a substantially circular arc shape with the rotating shaft 6 as the center, and the bottom of the water tank 5 is formed to be inclined so as to gradually decrease toward the recessed portion 17 . In the concave portion 17 , a drain port 18 is formed at one end portion of the concave portion 17 , and the bottom surface of the concave portion 17 is formed to be inclined so as to become gradually 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 of the washing tub 7 during dehydration. In the present embodiment, the rotation direction of the washing tub 7 during dehydration is the clockwise direction when the washing tub 7 is viewed from above, and is the direction of the arrow A shown in FIG. 11 .

In the recessed part 17 formed in the bottom of the water tank 5, the mounting part 20 on which the heating device 19 is mounted is integrally formed by bulging upward from the bottom of the recessed part 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 part 20 of the heating device 19 is formed so as to straddle the concave part 17 from the side surface of the water tank 5 , and is formed to bulge upward from the bottom surface of the concave part 17 . The top surface of the mounting portion 20 is formed to be approximately the same height as the bottom surface of the water tank 5 . degrees, or a height slightly higher than the bottom surface of sink 5. The attachment part 20 has the 1st side 20a and the 2nd side 20b which are substantially orthogonal to the rotation direction of the washing tub 7, ie, the arrow A, and the 2nd side 20b which are substantially orthogonal to the 1st side 20a. The 1st side surface 20a is comprised so that it may incline toward the rotation direction side of the washing tub 7 as it goes upward from the bottom surface side of the recessed part 17. As shown in FIG. The second side surface 20b is formed in a substantially vertical plane, and an installation opening 21 (refer to FIGS. 7 and 8 ) into which the heating device 19 is inserted from the outside of the water tank 5 is formed in the second side surface 20b.

In the heating device 19, the heating wire is formed in a meandering shape, and both end portions are fixed 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 arranged at approximately the center of both end portions of the heating wire, and is designed to accurately detect the temperature of the heating device 19 . A sealing material (not shown) is provided on the outer peripheral portion of the mounting plate 22, and the mounting plate 22 is watertightly attached to the periphery of the mounting opening 21 of the second side surface 20b of the mounting portion 20 through the sealing material.

The water tank 5 is installed on the casing 1 in the following manner: in the outer side of the water tank 5, the installation opening 21 of the installation part 20 will be located at a position opposite to the door body 3, and the aforesaid door body 3 is the outer side of the casing 1. The opening 2 is closed so as to be openable and closable. When the door body 3 is opened, the installation opening 21 of the installation part 20 faces the opening 2 of the housing 1 , so that maintenance of the heating device 19 installed in the installation opening 21 becomes possible.

A heat insulating plate 24 is disposed below the heating device 19, and the heat insulating plate 24 is made of metal, and in this embodiment, made of stainless steel is formed and fixed in a state with a gap from the bottom surface of the recessed portion 17 . By disposing the heat insulating plate 24 between the heating device 19 and the bottom surface of the recessed portion 17, the heat generated by the heating device 19 can be suppressed from being directly transmitted to the recessed portion 17, and thermal degradation of the bottom of the water tank 5 in which the recessed portion 17 is formed can be suppressed.

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

A heating plate 25 is disposed above the heating device 19 . The heating plate 25 is formed of metal, in this embodiment, stainless steel, 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 on the center side of the water tank 5. As shown in FIG. The through hole 25 a 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 arranged between the bottom surface of the washing tub 7 and the heating device 19, the direct conduction of the heat generated from the heating device 19 to the washing tub 7 can be suppressed, and the washing tub can be prevented from being directly conducted. Thermal degradation of the bottom of 7.

The heating plate 25 is fixed at a distance from the heating device 19 by a plurality of ribs 26 (see FIG. 8 ) erected upward from the bottom surface of the recessed portion 17 . The heating plate 25 is installed 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 . In addition, the heating plate 25 is installed so as to be inclined gradually toward the through hole 25a, and the washing liquid heated by the heating device 19 is efficiently guided to the through hole 25a due to the inclination of the heating plate 25.

In this embodiment, the inclination angle of the heating plate 25 with respect to the horizontal is set to 3 degrees. In the washing machine of the present embodiment, the allowable inclination at the time of installation is set to 2 degrees with respect to the horizontal, and when the washing machine is installed at an inclination of 2 degrees, the heating plate 25 is also set to incline with respect to the ground plane.

The heating plate 25 is formed in a substantially rectangular shape. The side 25b of the heating plate 25 located on the side of the second side surface 20b of the mounting portion 20 is mounted in a state of contacting or approaching the second side surface 20b of the mounting portion 20 . The side 25 c of the heating plate 25 located on the outer peripheral side of the recessed portion 17 is attached so as to be in contact with or close to the side surface of the outer peripheral side of the recessed portion 17 . The side 25d of the heating plate 25 located on the center side of the recessed portion 17 is attached so as to be in contact with or close to the side surface of the center side of the recessed portion 17 . The side 25e of the heating plate 25 located on the rotation direction side of the washing tub 7 has a space|interval with the side surface of the recessed part 17. As shown in FIG. The side 25f of the heating plate 25 located between the side surface of the center side of the recessed portion 17 and the second side surface 20b of the mounting portion 20 is formed in an arc shape, and is located between the side surface of the center side of the recessed portion 17 and the second side surface 20b of the mounting portion 20. There are intervals between.

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

In the vicinity of the heating device 19 of the recessed portion 17 , a circulating water port 32 is formed between the heat insulating plate 24 and the side wall of the recessed portion 17 (see FIGS. 3 , 8 , and 9 ). The circulation water port 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 arranged outside the water tank 5, and circulates The other end of the loop 28 is connected to a water injection port 29 formed near the input port 10 . The washing liquid in the water tank 5 sucked from the circulating water port 32 flows in the circulation path 28 by the circulating pump 27 and is supplied to the laundry in the washing tank 7 from the top of the water injection port 29 .

The water injection port 29 is disposed above the discharge port 16 of the circulating water channel, which is formed by the side wall 7a of the washing tub 7 and the circulating water channel cover 15 . The circulation amount of the washing liquid by the circulating pump 27 is set to be larger than the circulation amount of the washing liquid in the circulating water channel. As a result, the amount of the washing liquid supplied from the water injection port 29 is increased, and the washing liquid is supplied from a high position, and the supplied washing liquid collides with the washing or washing liquid in the washing tank 7 to foam, and then It coats the laundry with a large amount of foam and works with dirt to improve 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 driving strokes, and the set driving strokes and the like are displayed. A control device 33 (refer to FIG. 1 ) is disposed at a position facing the opening 2 formed in the casing 1 , and the control device 33 executes the operation course selected by the operation display device 30 .

In the present embodiment, among the operation courses performed by the control device 33, a course for washing by heating the washing liquid and a course for washing in a non-heated state of the washing liquid are provided.

Hereinafter, in the washing machine configured as above, the operation and the effect thereof will be described.

Open the outer cover 12 and the cover body 11, put the laundry into the washing tank 7 from the input port 10, close the outer cover 12 and the cover body 11, and then operate the operation A power switch (not shown) of the display device 30 turns on the power. By operating the display device 30, an operation course or the like is selected, and a start switch (not shown) is operated to start the operation.

Once the operation starts, after detecting the amount of the loaded laundry, the water supply device (not shown) will be activated to start water supply, and the washing liquid will be supplied with the lotion put into the detergent box (not shown) to the in tank 5.

When a predetermined amount of the washing liquid is stored in the water tank 5, the circulation pump 27 is activated to inject the washing liquid from the water injection 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 tank 7 and foam, and the foam will penetrate deep into the fibers of the laundry and cover the dirt, making the dirt dirty. Wash it off after it floats.

The water supply amount to the water tank 5 is set according to the amount of laundry put into the washing tank 7, and the water supply will be stopped when a predetermined water level is detected by the water level sensor (not shown), and the motor 9 will be driven. The pulsator 8 rotates forward and reverse alternately. The laundry in the washing tank 7 is stirred together with the washing liquid by the rotation of the pulsator 8 to wash the laundry.

During the washing step, the operation of the circulation pump 27 continues. Circulates the foamed washing liquid and makes the foam and dirt work, so that the dirt can be removed efficiently.

The washing step is continued for a predetermined time, and after the washing step is completed, a drain valve (not shown) is opened to drain the water. When draining is complete, dehydration takes place. Dehydration is performed by rotating the washing tub 7 in one direction, and in this embodiment, by rotating the washing tub 7 clockwise (direction of arrow A in FIG. 11 ) at a high speed when viewed from above.

After the dehydration, the water supply device is activated to supply a predetermined amount of water to the washing tub 7, and then the washing step is performed, followed by the dehydration step, and each step of the washing is completed.

When a course for heating the washing liquid to perform washing is selected as the operation course, in the washing step, a heating step for heating the washing liquid is performed. After the operation is started, the amount of the put-in laundry will be detected, and water will be supplied to the water tank 5 according to the amount of the put-in laundry. 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 upward. Since the heating plate 25 located above the heating device 19 is inclined and arranged to gradually increase toward the through-hole 25a side, the heated washing liquid is guided to the through-hole 25a along the inclination of the heating plate 25. And it moves to the upper direction of the heating plate 25 from the through-hole 25a.

Since the cleaning liquid below the heating plate 25 moves toward the upper side of the heating plate 25 , the low-temperature cleaning liquid flows into the lower side of the heating plate 25 from the periphery of the heating plate 25 . Since the side 25e and the side 25f of the heating plate 25 are spaced apart from the side surfaces of the concave portion 17, the washing liquid flows into the underside of the heating plate 25 from the two sides of the heating plate 25 which are substantially opposite to each other. On the rotational direction side of the groove 7, the side 25f is located between the side surface on the center side of the recessed portion 17 and the second side surface 20b. Since the washing liquid flows into the underside 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 heated efficiently. In addition, since the heating device 19 also heats the heating plate 25, the washing liquid is also heated by the heating plate 25, thereby improving the heating efficiency of the washing liquid.

Since the through-hole 25a is formed on the inclined upper side of the heating plate 25, the heated washing liquid can be efficiently guided upward. Since the through-hole 25a is formed at a position shifted in the lateral direction from the upper position of the heating device 19, and the upper part of the heating device 19 is covered by the heating plate 25, the heating plate 25 can prevent foreign matter from contacting the heating device 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 this 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 the washing liquid from the water injection port 29 to the laundry. Since the heated washing liquid is circulated, the powder lotion can be dissolved efficiently, and the dissolved residue of the powder lotion can be suppressed, so that 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 and foams, and the foam penetrates into the laundry to wash away the dirt adhering to the deep part of the fibers. Since the washing liquid is heated, the enzymes of the lotion will be activated, which can improve the cleaning power.

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

When the pulsator 8 rotates, the washing liquid is pushed out to the outer peripheral side by the centrifugal force generated by the rotation of the vanes 8a formed on the lower surface of the pulsator 8, and passes through the side wall 7a of the washing tank 7 and the circulating water passage cover. The circulating water path formed by 15 rises, and is sprayed toward the laundry in the washing tank 7 from the discharge port 16 .

Since the washing liquid sprayed onto the laundry from the discharge port 16 is heated to a predetermined temperature, the enzymes in the washing liquid are activated, and the stains on the fibers of the laundry can be efficiently cleaned.

As described above, when a course in which the washing liquid is heated and washed is selected as the operation course, in the washing step, the heating step of heating the washing liquid is performed. At this time, the heating device 19, the circulation pump 27, and the pulsator 8 operate as follows in accordance with various conditions.

The washing liquid heated by the heating device 19 moves upward. Along with this, the low-temperature washing liquid moves below 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 tub 7 and supplies it into the washing tub 7 from the water injection port 29 . Thereby, the washing liquid in the upper part and the lower part in the washing tub 7 is mixed, and the temperature can be raised evenly.

When the amount of the laundry in the washing tub 7 is larger than a predetermined amount, the temperature difference of the washing liquid contained in the upper part and the lower part of the washing tub 7 becomes large. Conversely, 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 part and the lower part of the washing tub 7 becomes relatively small.

Therefore, the amount of laundry in the washing tub 7 is larger than the predetermined amount At the same time, the heating device 19 and the circulation pump 27 are actuated at the same time, so that the temperature of the washing liquid contained in the upper part and the lower part of the washing tub 7 can be averaged. On the other hand, when the amount of laundry in the washing tub 7 is less than the predetermined amount, only the heating device 19 is activated, whereby the temperature of the washing liquid contained in the laundry can be raised evenly without using excess power.

In the present embodiment, as a result of various experiments, the predetermined amount of laundry is about 1/5 of the weight of the laundry in the washing and dehydrating capacity. More specifically, an experiment was conducted using washing machines having a washing and dehydration 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 part and the lower part of the washing tank 7 becomes larger. Conversely, when the amount of the washing liquid in the washing tub 7 is smaller than the predetermined amount, the temperature difference between the upper part and the lower part of the washing tub 7 becomes relatively small.

Therefore, when the amount of the washing liquid in the washing tank 7 is larger than a predetermined amount, the heating device 19 and the circulation pump 27 are simultaneously actuated. Thereby, the washing water in the upper part and the lower part in the washing tub 7 is mixed, and the temperature can be raised 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 temperature can be raised evenly without using excess electric power.

In the present embodiment, as a result of various experiments, the predetermined amount of the washing liquid is set to be about 1/4 of the washing liquid required for washing the laundry of the washing and dehydrating capacity. More specifically, experiments were conducted using washing machines with washing and dehydration capacities of 10 Kg and 12 Kg in weight, and as a result, the predetermined amount was set to 30 L.

When the amount of laundry to be washed is small and the amount of 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 the height of the discharge port 16 located in the middle of the washing tank 7 When the height is increased and the pulsator 8 is actuated, the washing liquid is discharged and sprayed into the washing tub 7 from the discharge port 16 located in the middle part of the washing tub 7 .

Conversely, when the amount of laundry to be washed is large and the amount of 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 in the middle of the washing tank 7 The height of the pump 27 is activated, and the washing liquid is sprayed into the washing tank 7 from the water injection port 29 .

Therefore, when the amount of laundry in the washing tub 7 is small, only the pulsator 8 is activated after the heating device 19 is activated, whereby the temperature can be raised evenly without using excess electric power. Also, when the amount of laundry in the washing tub 7 is large, the heating device 19 and the circulating pump 27 are actuated at the same time, whereby the washing liquid in the upper part and the lower part of the washing tub 7 is mixed and the temperature can be raised evenly.

After the washing process with warm water is completed, the drain valve (not shown) is opened and drained. When draining is complete, dehydration takes place. The spin-drying|dehydration is performed by making the washing tub 7 orientate in one direction, and by rotating the washing tub 7 at a high speed in the clockwise direction when viewed from above in this embodiment.

After the dehydration, the water supply device is activated to supply a predetermined amount of water to the washing tub 7, and then the washing step is performed, followed by the dehydration step, and each step of the washing is completed.

In the spin-drying step, the washing tub 7 is rotated at a high speed in the clockwise direction when viewed from above. By the rotation of the washing tank 7, an airflow is generated in the water tank 5 in the direction of the arrow A shown in FIG. 11, and the washing after dehydration The liquid will flow with the airflow.

Since the 1st side surface 20a of the attachment part 20 inclines toward the rotation direction side of the washing tub 7 as it goes up, the flow accompanying the rotation of the washing tub 7 is guided along the inclination of the 1st side surface 20a. Therefore, the first side surface 20a inclined toward the rotation direction side of the washing tub 7 can prevent the flow accompanying the rotation of the washing tub 7 from being blocked, thereby suppressing the generation of turbulent flow and suppressing the generation of vibration.

Although the second side surface 20b is formed to be substantially vertical in order to install the heating device 19, since the second side surface 20b is located on the downstream side of the flow accompanying the rotation of the washing tub 7 compared with the first side surface 20a, it does not hinder the flow and does not generate Turbulence.

The upper part of the heating device 19 is covered by the heating plate 25, and since the heating plate 25 is arranged 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. , which 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 drain port 18 . In the draining step, the washing liquid in the water tank 5 will flow toward the drain port 18 . Since the heating device 19 is arranged at a position separated from the drain port 18 , the washing liquid at a position facing 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 passing through the heating device 19 is reduced, the lint contained in the washing liquid can be suppressed from adhering to the heating device 19 .

Maintenance is required when a malfunction occurs in the heating device 19, etc. In the case of the heating device 19 , first, the washing machine is rotated to a position facing the door body 3 , and the door body 3 is removed 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 removing the door body 3 .

The heating device 19 can be removed from the water tank 5 by removing the wiring from the terminals at both ends of the heating device 19 and removing fixing screws (not shown). After the heating device 19 is pulled out of the water tank 5, maintenance can be performed. When replacing the heating device 19 with a new heating device 19, the new heating device 19 is inserted into the mounting opening 21 of the mounting portion 20 of the water tank 5, and the fixing screws are screwed to fix the heating device 19 to the water tank 5. After that, wirings are attached to the terminals of the heating device 19 . Finally, the maintenance is completed 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 become gradually lower toward the drain port 18 , and the bottom surface of the water tank 5 including the bottom surface of the concave portion 17 is formed so that the outer peripheral side becomes the highest. Reinforcing ribs 31 are formed on the bottom surface of the water tank 5 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 recessed portion 17 , the height of the reinforcing ribs 31 on the outer side surface of the recessed portion 17 can be made high, and the strength of the recessed portion 17 can be improved.

The heating device 19 is installed so as to be substantially parallel to the bottom surface of the concave portion 17, and is disposed so as to be inclined so that the side of the water outlet 18 becomes lower with respect to the horizontal plane. Since the heating device 19 is arranged substantially parallel to the bottom surface of the concave portion 17 , it is less likely to become a resistance to the drainage flowing toward the drainage port 18 , and lint contained in the drainage can be prevented from being entangled in the heating device 19 .

In this embodiment, although the opening 2 is formed in the casing 1 However, it can also be formed on the side of the casing 1, and the heating device 19 faces the opening 2 on the side of the casing 1, and the opening 2 can also be formed on the front of the casing 1, and the heating device 19 faces To the opening 2 on the front of the housing 1.

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

(Second Embodiment)

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

The present embodiment is the same as the first embodiment except that a heating plate 35 having a different shape from the heating plate 25 of the first embodiment is used and the position of the drain port 18 is different, so the same parts as those of the first embodiment are added. The same symbols are used and their descriptions are omitted.

A heating plate 35 is disposed above the heating device 19 . The heating plate 35 is formed of metal, in this embodiment, stainless steel, and the heating device 19 is configured to be covered by the heating plate 35 . Since the heating device 19 is covered with the heating plate 35, the direct conduction of the heat generated from the heating device 19 to the washing tub 7 can be suppressed, and thermal degradation of the bottom of the washing tub 7 can be suppressed.

The heating plate 35 is formed in a substantially rectangular shape. The side 35b of the heating plate 35 located on the side of the second side surface 20b of the mounting portion 20 is mounted in a state of contacting or approaching the second side surface 20b of the mounting portion 20 . The side 35 c of the heating plate 35 located on the outer peripheral side of the recessed portion 17 is attached so as to be in contact with or close to the side surface of the outer peripheral side of the recessed portion 17 . The side of the heating plate 35 on the center side of the recess 17 35d is a state in which it is attached so as to be in contact with or close to the side surface on the center side of the recessed portion 17 . An arc-shaped cutout 35h is formed on the side 35c and the side 35d of the heating plate 35 , and the washing liquid is configured to pass through the cutout 35h and convection. The side 35e of the heating plate 35 on the rotational direction side of the washing tub 7 is spaced from the side surface of the recessed portion 17 at its position.

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

In this embodiment, the inclination angle of the heating plate 35 with respect to the horizontal is set to 3 degrees. In the washing machine of the present embodiment, the allowable inclination at installation is set to 2 degrees with respect to the horizontal, and when the washing machine is installed at an inclination of 2 degrees, the heating plate 35 is also set to incline with respect to the ground plane.

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

When a course of heating the washing liquid for washing is selected as the operation course, 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 upward. Since the heating plate 35 located above the heating device 19 is inclined and arranged so as to become gradually higher toward the side 35e, the heated washing liquid is guided along the heating plate 35 to the side 35e, and then flows from the side 35e. Move side to plus above the hot plate 35 .

Since the cleaning liquid below the heating plate 35 moves toward the upper side of the heating plate 35 , the low-temperature cleaning liquid flows from the periphery of the heating plate 35 toward the lower side of the heating plate 35 . Since the side 35c and the side 35d of the heating plate 35 are formed with notches 35h, the washing liquid flows from the sides 35c and 35d, which are substantially opposite sides of the heating plate 35, to the lower side of the heating plate 35 through the notches 35h. Since the washing liquid flows into the underside of the heating plate 35 from the sides 35c and 35d, which are substantially opposite sides of the heating plate 35, the washing liquid is efficiently convected and the washing liquid can be heated efficiently. In addition, since the heating device 19 also heats the heating plate 35, the washing liquid is also heated by the heating plate 35, thereby improving 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 upward. Since the upper part of the heating device 19 is covered by the heating plate 35 , the heating plate 35 can prevent foreign matter from contacting the heating device 19 .

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

As described above, the washing machine of the first invention includes: a casing; a water tub disposed in the casing; a washing tub rotatably disposed in the water tub; a drive device for rotationally driving the washing tub; and a heating device disposed in in the sink and heat the washing liquid. The heating device is installed in the installation part formed in the water tank, and the installation part is substantially perpendicular to the rotation direction of the washing tank during dehydration The 1st side surface is formed by inclining toward the rotation direction side of the washing tank.

With this configuration, in the spin-drying step, when the washing tank is rotated, an airflow is generated in the water tank due to the rotation of the washing tank, and the washing liquid after the spin-drying flows together with the airflow. Since the first side surface of the mounting 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, preventing the flow from being blocked, and suppressing the disorder. flow and suppress vibration.

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

With this configuration, although the second side surface is formed to be substantially vertical for the purpose of installing the heating device, since it is located on the downstream side of the flow accompanying the rotation of the washing tank compared to the first side surface, the flow is not hindered and the flow is not blocked. generate turbulence.

In the washing machine of the third invention, in any one of the first invention or the second invention, a drain port is formed in the water tank, the bottom surface of the water tank is formed to gradually decrease toward the drain port, and the heating device is arranged so as to be approximately the same as the bottom surface of the water tank. Can be parallel.

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

In the washing machine of the fourth invention, in any one of the first invention or the second invention, heat insulation may be provided between the bottom surface of the water tank and the heating device. The above-mentioned heat insulation board will insulate the heat generated by the heating device transmitted to the bottom surface of the water tank.

With this configuration, it is possible to suppress the direct transfer of the heat generated by the heating device to the bottom surface of the water tank, thereby suppressing thermal degradation of the bottom surface of the water tank.

In the washing machine of the fifth invention, in any one of the first invention or the second invention, a 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 part of the heating device.

With this configuration, it is possible to suppress the direct transfer of the heat generated by the heating device to the bottom surface of the washing tub, thereby suppressing thermal degradation of the bottom of the washing tub.

In addition, since the upper part 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.

The washing machine of the sixth invention comprises: a casing; a water tank disposed in the casing; a washing tub rotatably disposed in the water tub; a driving device for rotationally driving the washing tub; The washing liquid is drained; and a heating device is arranged at the bottom of the water tank and heats the washing liquid. Arrange the drain port and the heating mechanism in separate locations.

With this configuration, the washing liquid at a position separated from the heating device flows out of the drain port without passing through the heating device. Since the amount of the washing liquid passing through the heating device is reduced, the lint contained in the washing liquid can be suppressed from adhering to the heating device.

Especially in the washing machine of the seventh invention, in the sixth invention, a heat insulating plate may be provided 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 to the bottom surface of the water tank.

With this configuration, it is possible to suppress the direct transfer of the heat generated by the heating device to the bottom surface of the water tank, thereby suppressing thermal degradation of the bottom surface of the water tank.

In the washing machine of the eighth invention, especially in any one of the sixth invention or the seventh invention, a heating plate may be provided between the bottom surface of the washing tub and the heating device, and the heating plate may cover the upper part of the heating device.

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

The washing machine of the ninth invention includes: a casing; a water tank arranged in the casing; a washing tub rotatably arranged in the water tub; a driving device for rotationally driving the washing tub; liquid. The casing has an opening that can be opened and closed by a door body, and a mounting portion to which the heating device can be mounted is provided in the water tank, and a mounting opening is formed on the mounting portion at a position facing the opening, and the mounting opening is for heating The device is inserted into the sink from the outside of the sink.

With this configuration, when maintenance of the heating device is required, such as when a malfunction occurs in the heating device, after rotating the washing machine to a position facing the door body and removing the door body from the casing, the heating device is disposed on the surface. For the position of the opening after dismantling the door, the maintenance of the heating device can be carried out by dismantling the door.

Especially in the washing machine of the tenth invention, in the ninth invention, the opening may be formed on the back surface of the casing.

With this configuration, in the installed state of the washing machine, the door body is invisible, and the appearance is not impaired.

Especially in the washing machine of the eleventh invention, in the ninth invention, the opening may be formed on the side surface of the casing.

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

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

With this configuration, it is possible to suppress the direct transfer of the heat generated by the heating device to the bottom surface of the water tank, thereby suppressing thermal degradation of the bottom surface of the water tank.

In the washing machine of the thirteenth invention, especially in any one of the ninth to eleventh inventions, a heating plate may be provided between the bottom surface of the washing tub and the heating device, and the heating plate may cover the upper part of the heating device.

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

The heated water generating device of the fourteenth invention includes: a water tank; a heating device arranged on the bottom of the water tank to heat the liquid in the water tank; a temperature sensor provided on the heating device; and a heating plate arranged above the heating device to cover the heating device. The heating plate forms a through hole substantially above the temperature sensor.

With this configuration, the warm water heated by the heating device transmits heat to the entire water tank through the heating plate, so that thermal deterioration due to direct thermal damage to other materials can be suppressed.

In addition, the warm water heated by the heating device will not be disturbed by the heating plate at the position above the temperature sensor, and can flow to the top through the through hole, so that stable temperature detection can be performed.

The washing machine of a fifteenth invention is a washing machine provided with the heated water generating device of the fourteenth invention.

With this configuration, the warm water heated by the heating device transmits heat to the entire water tank through the heating plate, so that thermal deterioration due to direct thermal damage to other materials can be suppressed.

In addition, the warm water heated by the heating device will not be disturbed by the heating plate at the position above the temperature sensor, and can flow to the top through the through hole, so that stable temperature detection can be performed.

The washing machine of the sixteenth invention comprises: a casing; a water tank arranged in the casing; a washing tank rotatably arranged in the water tank; a pulsator rotatably arranged on the inner bottom of the water tank; a driving device for rotationally driving washing a tank and a pulsator; a circulation circuit, which is connected to the washing tank so that the water in the washing tank can be circulated; and a circulation pump, which forms a water flow in the circulation circuit. Equipped with: a heating device, which is arranged in a water tank and heats the washing liquid; and a control device, which controls a driving device, a circulation pump, and a heating device. The control device causes the circulation pump to operate simultaneously with the heating device.

With this configuration, the low-temperature washing liquid at the bottom of the washing tank is circulated by the circulation pump, and is supplied into the washing tank from the water injection port. By this operation, the washing water in the upper part and the lower part in the washing tub is mixed, and the temperature can be raised evenly.

In the washing machine of the seventeenth invention, in the sixteenth invention, the control device When the amount of water in the washing tank is larger than the specified amount, the circulating pump and the heating device will be activated at the same time, and when the amount of water in the washing tank is less than the specified amount, only the heating device may be activated.

With this configuration, when the amount of the washing liquid in the washing tank is larger than a predetermined amount, the heating device and the circulation pump are simultaneously activated, whereby the washing water in the upper part and the lower part in the washing tank is mixed, and the temperature can be raised evenly. In addition, when the amount of the washing liquid in the washing tub is smaller than a predetermined amount, only the heating device is activated, whereby the temperature of the washing water can be raised evenly without using excess electric power.

In the washing machine of the eighteenth invention, in any one of the sixteenth invention or the seventeenth invention, when the amount of laundry in the washing tub is larger than a predetermined amount, the control device causes the circulation pump and the heating device to operate simultaneously, and the control device operates the washing tub at the same time. When the amount of clothes inside is smaller than the predetermined amount, only the heating device may be activated.

With this configuration, when the amount of laundry in the washing tub is larger than a predetermined amount, the heating device and the circulation pump are simultaneously activated, whereby the temperature of the washing liquid contained in the upper and lower laundry in the washing tub can be averaged. Furthermore, when the amount of laundry in the washing tub is less than a predetermined amount, only the heating device is activated, whereby the temperature of the washing water contained in the laundry can be raised evenly without using excess electric power.

The washing machine of the nineteenth invention has a discharge port located in the middle part of the washing tub, and in any one of the sixteenth invention or the seventeenth invention, when the amount of water in the washing tub by the control device is less than a predetermined amount, the After the heating device is energized, only the pulsator is activated, and when the amount of water in the washing tank is larger than a predetermined amount, the circulating pump is activated while the heating device is energized You can also.

With this configuration, when the amount of the washing liquid in the washing tank is smaller than the predetermined amount, only the pulsator is activated after the heating device is activated, whereby the temperature can be raised evenly without using excess electric power. Furthermore, when the amount of the washing liquid in the washing tank is larger than a predetermined amount, the heating device and the circulation pump are simultaneously activated, whereby the washing water in the upper part and the lower part of the washing tank is mixed, and the temperature can be raised evenly.

In the washing machine of the twentieth invention, in any one of the sixteenth invention or the seventeenth invention, when the amount of laundry in the washing tub is less than a predetermined amount, the control device operates only the pulsator after energizing the heating device, and When the amount of laundry in the washing tub is larger than a predetermined amount, the circulating pump is activated while energizing the heating device.

With this configuration, when the amount of laundry in the washing tub is smaller than a predetermined amount, only the pulsator is activated after the heating device is activated, whereby the temperature can be raised evenly without using excess electric power. Also, when the amount of laundry in the washing tub is larger than a predetermined amount, the heating device and the circulation pump are simultaneously actuated, whereby the washing water in the upper and lower parts of the washing tub is mixed and the temperature can be raised evenly.

The washing machine of the 21st invention comprises: a casing; a water tub disposed in the casing; a washing tub rotatably disposed in the water tub; a drive mechanism for rotationally driving the washing tub; and a heating device disposed in the water tub and heating the water tub The washing liquid; and the circulation path, the washing liquid in the water supply tank circulates from the top to the washing tank. The circulating water port leading to the circulating path is formed at the bottom of the water tank.

With this configuration, the water heated by the heating device can be The washing liquid at the bottom of the tank circulates toward the upper part of the tank, so the whole washing liquid in the tank can be heated up efficiently, and the uneven washing can be reduced, so that the dirt can be easily removed.

In particular, in the washing machine of the 22nd invention, in the 21st invention, the circulating water port may be formed in the vicinity of the heating device.

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

In the washing machine of the 23rd invention, in any one of the 21st invention or the 22nd invention, the circulating water port may be formed by protruding upward toward the heating device from the bottom surface of the water tank.

As the washing liquid heated by the heating device moves upward, the washing liquid with a relatively low temperature flows in from the surroundings. However, with this configuration, the circulating water port is formed by protruding upward from the bottom surface of the water tank toward the heating device. 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 generation of vibration during the spin-drying operation, it can also be applied to applications such as a washing-drying machine, a business washing machine, and the like.

5: Sink

17: Recess

19: Heating device

20: Installation Department

20a: 1st side

A: Arrow

Claims (5)

A washing machine is characterized by comprising: a casing; a water tank disposed in the casing; a washing tub rotatably disposed in the water tub; a driving device for rotationally driving the washing tub; and a heating device disposed in the In the water tank, the washing liquid is heated, and the heating device is installed in a mounting portion formed in the water tank, and the mounting portion is directed toward the washing tank from a first side surface orthogonal to the rotation direction of the washing tank during dehydration. The rotation direction side is inclined and formed. The washing machine of claim 1, wherein the mounting portion forms an opening for mounting the heating device on a second side surface orthogonal to the first side surface. The washing machine of claim 1 or 2, wherein a drain port is formed in the water tank, the bottom surface of the water tank is formed to gradually decrease toward the drain port, and the heating device is disposed parallel to the bottom surface of the water tank. The washing machine of 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 insulates heat generated by the heating device transmitted from the bottom surface of the water tank. The washing machine of claim 1 or 2, wherein a heating plate is arranged between the bottom surface of the washing tub and the heating device, and the heating plate covers the upper part of the heating device.

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