TW202300751A - washing machine - 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

field of invention The present invention relates to a washing machine and a heating water generator for washing clothes with warm water.

Background of the invention Conventionally, as such a washing machine, as disclosed in Japanese Patent Application Laid-Open No. 2006-43100, a washing machine in which dirt is easily removed by heating a washing liquid has been proposed.

Fig. 15 is a sectional view of a conventional washing machine. In FIG. 15 , there are: a water supply port 62 for supplying water to a water tank 63 ; and a switch valve 66 for dividing 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 in that the flow path for supplying the heated washing liquid to the water tank 63 becomes complicated.

Then, in order to solve this problem, it is conceivable to dispose a heater 72 at the bottom of the water tank 71 as shown in FIG. 16 .

Fig. 16 is a perspective view of a conventional water tank. In the water tank 71 , a recessed portion 73 is formed at the bottom, and the heater 72 is disposed in the recessed portion 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 concave portion 73 is formed.

Summary of the invention However, in the conventional structure, a washing tank (not shown) is rotatably arranged in the water tank 71, and during the dehydration operation, the washing tank rotates in the direction of the arrow in FIG. 16 , and the rotation of the washing tank However, the flow of the washing liquid is generated 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 the direction perpendicular to the flow of the washing liquid, the washing liquid will collide with the support part of the heater 72 to generate turbulent flow, so the washing tank cannot rotate well and vibrates The problem. Or, there is a problem that spin resistance increases due to abnormal generation of foam, resulting in poor dehydration.

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

The washing machine of the present invention comprises: a casing; a water tank arranged in the casing; a washing tank rotatably arranged in the water tank; a driving device rotating and driving the washing tank; and a heating device arranged in the water tank and heating the washing liquid . The heating device is mounted on a mounting portion formed on the water tank, and the mounting portion is formed by inclining the first side surface substantially perpendicular to the rotating direction of the washing tank during dehydration toward the rotating direction side of the washing tank.

With this configuration, it is possible to provide a washing machine capable of suppressing vibration and abnormal generation of bubbles during spin-drying operation.

form for carrying out the invention (first embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In addition, this invention is not an invention limited by this embodiment.

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

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

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

In this embodiment, although the opening 2 is formed on the back side of the housing 1, it 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 housing 4 is arranged above the housing 1 . In the space surrounded by the casing 1 and the upper casing 4, a bottomed cylindrical water tank 5 formed of flame retardant synthetic resin is supported, and a rotating shaft is arranged on the central axis of the water tank 5. Axis 6. In the water tank 5, the washing tank 7 connected with the rotating shaft 6 is built in. A pulsator (pulsator) 8 connected to the rotating shaft 6 is arranged at the bottom of the washing tank 7 . Below the water tank 5, a motor 9 which is a driving device is disposed. 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, an inlet 10 for inserting laundry into the washing tub 7 is formed. The inlet 10 is closed by the lid body 11 so that it can be opened and closed freely. An external inlet (not shown) for injecting laundry into the washing tub 7 is formed in the upper housing 4 , and the external inlet is closed by the outer cover 12 so that it can be freely opened and closed.

The washing tank 7 is made of corrosion-resistant metal, 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 is It is integrally fixed with the bottom wall 7b. The washing tank 7 is provided with a plurality of dehydration holes 13 on the side wall 7a, and an annular fluid balancer 14 for reducing dehydration vibration is installed on the upper part.

In the washing tank 7 , a circulating water channel cover 15 is provided at a position facing the side wall 7 a, and a circulating water channel (not shown) is formed between the side of the washing tank 7 and the circulating water channel cover 15 . In the washing tank 7, by installing a pair of circulating water channel covers 15, two circulating water channels are formed facing each other. In order to suppress unbalance when the washing tub 7 rotates, it is preferable that the circulating water channel cover 15 and the circulating water channel be formed in the same shape, but the shapes may be different as required.

In the circulating water channel cover 15 , discharge ports 16 are formed at positions corresponding to the upper part and the middle part of the washing tub 7 . The discharge port 16 may be formed only in 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 toward the outer peripheral side by the centrifugal force of the vane 8a, circulates in the circulating water channel, and flows from the The discharge port 16 of the circulating water channel discharges and sprays the washing liquid into the washing tank 7 .

At the bottom of the water tank 5 , a concave portion 17 is formed in a substantially arc shape centering on the rotating shaft 6 , and the bottom 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 of the recessed portion 17 , and the bottom surface of the recessed 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 concave portion 17 at a position on the front side in the rotation direction of the washing tub 7 during dehydration. In this embodiment, the rotation direction of washing tub 7 during dehydration is clockwise when viewing washing tub 7 from above, and is in the direction of arrow A shown in FIG. 11 .

In the recess 17 formed on the bottom of the water tank 5, the installation part 20 on which the heating device 19 is installed is integrally formed by bulging upward from the bottom of the recess 17. As shown in FIG. 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 across the recessed part 17 from the side surface of the water tank 5, and is formed to bulge upward from the bottom surface of the recessed part 17. As shown in FIG. The top surface of the mounting part 20 is formed to be substantially the same height as the bottom surface of the water tank 5 or slightly higher than the bottom surface of the water tank 5 . The mounting part 20 has a first side 20a substantially perpendicular to the rotation direction of the washing tub 7, ie arrow A, and a second side 20b substantially perpendicular to the first side 20a. 1st side surface 20a is comprised so that it may incline toward the rotation direction side of washing tub 7 as it goes upward from the bottom surface side of recessed part 17. As shown in FIG. The second side surface 20b is formed in a substantially vertical planar shape, and an attachment opening 21 through 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 a heating wire in a meandering shape, and fixes both end parts to a mounting plate 22 having an insulating and heat insulating function. A temperature sensor 23 constituted by a thermistor is installed 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 approximately at the center of both ends of the heating wire, and is configured 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 mounted to the periphery of the mounting opening 21 of the second side surface 20b of the mounting portion 20 by the sealing material.

The water tank 5 is mounted on the housing 1 in the following manner: on the outside 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 . The opening 2 is closed openably and closably. When the door body 3 is opened, the installation opening 21 of the installation part 20 will face the opening 2 of the casing 1, and maintenance of the heating device 19 installed in the installation opening 21 becomes possible.

A heat shield 24 is disposed below the heating device 19. The heat shield 24 is formed of metal, in this embodiment, stainless steel, and is fixed with a gap between it and the bottom surface of the recess 17. state. By arranging the heat insulating plate 24 between the heating device 19 and the bottom surface of the recess 17, the heat generated by the heating device 19 can be prevented from being directly transmitted to the recess 17, thereby suppressing thermal deterioration of the bottom of the water tank 5 where the recess 17 is formed.

In this embodiment, the heat shield 24 is formed by stainless steel in order to have corrosion resistance, but it can also be other metal materials, as long as it can prevent the heat of the heating device 19 from being conducted to the water tank 5, and has flame retardancy or As the incombustible material, materials other than metal, 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 metal, in this embodiment, stainless steel, and is disposed between the bottom surface of the washing tank 7 and the heating device 19 . In the heating plate 25 , a through-hole 25 a is formed on the center side of the water tank 5 . 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 tank 7 and the heating device 19, it is possible to prevent the heat from the heating device 19 from being directly transmitted to the washing tank 7, thereby preventing the heating of the washing tank. 7 Thermal deterioration of the bottom.

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 concave 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 part 20 of the heating device 19 . In addition, the heating plate 25 is installed with an inclination gradually increasing 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 this embodiment, the allowable inclination at the time of installation is set to 2 degrees relative 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 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 surface 20b side of the attachment portion 20 is attached so as to be in contact with or close to the second side surface 20b of the attachment portion 20 . The side 25c of the heating plate 25 located on the outer peripheral side of the recessed portion 17 is mounted in a state of being in contact with or close to the outer peripheral side of the recessed portion 17 . The side 25d of the heating plate 25 located at the center side of the recessed portion 17 is mounted in a state of being in contact with or close to the central side of the recessed portion 17 . A side 25 e of the heating plate 25 located on the rotation direction side of the washing tub 7 has a space from the side surface of the recess 17 . The edge 25f of the heating plate 25 located between the central side of the recess 17 and the second side 20b of the mounting part 20 is formed in an arc shape, and is between the central side of the recess 17 and the second side 20b of the mounting part 20. There is an interval 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 through the through hole 25g, the heated washing liquid will 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 concave portion 17, a circulating water port 32 is formed between the heat insulating plate 24 and the side wall of the concave portion 17 (see FIG. 3 , FIG. 8 , and FIG. 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 (see FIG. 3 ). The circulation path 28 is arranged outside the water tank 5 , and the other end of the circulation path 28 is connected to a water injection port 29 formed near the inlet 10 . The washing liquid in the water tank 5 sucked from the circulating water port 32 flows through the circulation path 28 by the circulating 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 channel formed by the side wall 7 a of the washing tank 7 and the circulating water channel 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 in the circulating waterway. Thereby, the amount of washing liquid supplied from the water injection port 29 will be large, and it will be supplied from a high position, and the supplied washing liquid will collide with the laundry or washing liquid in the washing tank 7 to cause foaming, and then Covers the laundry with a large amount of foam and works against dirt to improve cleaning performance.

An operation display device 30 is arranged on the upper rear portion of the upper housing 4 , and the operation display device 30 is operated to set various operation strokes, and displays the set operation strokes and the like. A control device 33 (refer to FIG. 1 ) is arranged at a position facing the opening 2 formed in the housing 1 , and the operation stroke selected by the operation display device 30 is executed by the control device 33 .

In the present embodiment, the operation course executed by the control device 33 includes a course of washing by heating the washing liquid and a course of washing in a non-heated state of the washing liquid.

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

Open the outer cover 12 and the cover body 11, put the laundry into the washing tank 7 from the inlet 10, close the outer cover 12 and the cover body 11, and then operate the power switch (not shown) of the operation display device 30 to turn on the power. . The operation course etc. are selected by operating the display device 30, and a start switch (not shown) is operated to start operation.

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

After a predetermined amount of 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 (refer to 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 Wash it off after it floats.

The amount of water supplied to the water tank 5 is set in response to the amount of laundry put into the washing tank 7, and the water supply will be stopped when the specified water level is detected by the water level sensor (not shown), and the motor 9 will be driven to 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 will continue. Circulate the foamed washing liquid, and make 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 finished, a drain valve (not shown) is opened to drain water. When the drainage is finished, dehydration will be carried out. Dehydration is carried out by rotating the washing tank 7 in one direction, and in this embodiment, the washing tank 7 is rotated clockwise (direction of arrow A in FIG. 11 ) at 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 tank 7, and then the washing step is performed, followed by the dehydration step, and the washing steps are completed.

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

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 from the periphery of the heating plate 25 toward the lower side of the heating plate 25 . Since the side 25e and the side 25f of the heating plate 25 have a space between the side surfaces of the recess 17, the washing liquid will flow into the bottom of the heating plate 25 from the roughly opposite sides of the heating plate 25. On the rotational direction side of the groove 7, the side 25f is located between the side surface on the central side of the recessed portion 17 and the second side surface 20b. Since the washing liquid flows into the bottom of the heating plate 25 from two substantially opposite sides of the heating plate 25, the washing liquid is efficiently convected, and the washing liquid can be efficiently heated. 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 laterally 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 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 specified temperature, the circulating pump 27 is activated to circulate the washing liquid and supply it to the laundry from the water injection port 29 . Since the heated washing liquid is circulated, the powder detergent can be efficiently dissolved, and the dissolved residue of the powder detergent 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 will collide with the laundry and foam, and the foam will penetrate into the laundry to wash away the dirt attached to the deep part of the fiber. Since the washing liquid is heated, the enzymes in the lotion will be activated, which can improve the cleaning power.

When the washing liquid reaches the specified temperature, the pulsator 8 is alternately rotated forward and reverse. The laundry in the washing tub 7 is stirred with the washing water by the rotation of the pulsator 8 to wash the laundry. Since the washing liquid is heated and then stirred, it is possible to suppress the dissolved residue of the powder detergent. In this state, the operation of the circulation pump 27 will continue to improve the cleaning efficiency.

When the pulsator 8 rotates, the washing liquid will be pushed out towards the outer peripheral side by the centrifugal force generated by the rotation of the blades 8a formed on the lower surface of the pulsator 8, and will flow through the side wall 7a of the washing tank 7 and the circulating waterway cover. 15 rises in the circulating water channel formed, and sprays towards the laundry in the washing tank 7 from the discharge port 16.

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

It has been described above that when the course of heating the washing liquid for washing is selected as the operation course, 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 will move upward. Along with this, the low-temperature washing liquid moves to the lower part of the washing tank 7 . At this time, the heating device 19 and the circulating pump 27 are operated simultaneously to circulate the low-temperature washing liquid at the bottom of the washing tank 7 by the circulating pump 27 and supply it into the washing tank 7 from the water injection port 29 . Thereby, the washing liquid in the upper part and the lower part in the washing tank 7 is mixed, and the temperature can be raised evenly.

When the amount of laundry in the washing tub 7 is larger than a predetermined amount, the temperature difference between the washing liquid contained in the upper and lower laundry in the washing tub 7 becomes larger. Conversely, when the amount of laundry in the washing tub 7 is less than the predetermined amount, the temperature difference between the washing liquid contained in the upper and lower laundry in the washing tub 7 becomes smaller.

Therefore, when the amount of clothes in the washing tank 7 is more than the specified amount, the heating device 19 and the circulation pump 27 will be activated simultaneously, thereby making the temperature of the washing liquid contained in the upper and lower clothes in the washing tank 7 average. . On the other hand, when the amount of clothes in the washing tub 7 is less than a predetermined amount, only the heating device 19 is activated, thereby increasing the temperature of the washing liquid contained in the clothes evenly without using extra power.

In the present embodiment, as a result of various experiments, the predetermined amount of clothes is about 1/5 of the weight of the laundry as the washing and dehydrating capacity. More specifically, experiments were performed using washing machines with washing and dehydrating capacities of 10Kg and 12Kg, and as a result, the predetermined amount was set to 2Kg.

When the amount of the washing liquid in the washing tank 7 is larger than a predetermined amount, the temperature difference between the upper and lower parts of the washing tank 7 becomes larger. Conversely, when the amount of the washing liquid in the washing tank 7 is less than the predetermined amount, the temperature difference between the upper and lower washing liquids in the washing tank 7 becomes smaller.

Therefore, when the amount of washing liquid in the washing tank 7 is larger than a predetermined amount, the heating device 19 and the circulation pump 27 are simultaneously activated. Thereby, the wash water in the upper part and the lower part in the washing tub 7 can be mixed, and the temperature can be raised evenly. On the other hand, when the amount of washing liquid in the washing tub 7 is less than a predetermined amount, only the heating device 19 is operated, thereby making it possible to raise the temperature evenly without using excess power.

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

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 clothes in the washing liquid in the washing tank 7 is sufficiently lower than the height of the outlet 16 at the middle of the washing tank 7. height, and the pulsator 8 is activated, and the washing liquid will be spouted and sprayed into the washing tank 7 from the discharge port 16 in the middle of the washing tank 7 .

Conversely, when the amount of laundry to be washed is large and the amount of washing liquid required for washing is large, the clothes in the washing liquid in the washing tank 7 are sufficiently higher than the discharge port 16 in the middle of the washing tank 7 height, and the circulating pump 27 is activated, and the washing liquid will be 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 power. Again, when the amount of clothing in the washing tank 7 is large, the heating device 19 and the circulation pump 27 will be activated simultaneously, whereby the washing liquid on the upper and lower parts in the washing tank 7 will be mixed, and the temperature can be raised evenly.

After the washing steps in the warm water are finished, the drain valve (not shown) will be opened and the water will be drained. When the drainage is finished, dehydration will be carried out. The dehydration is performed by turning the washing tank 7 in one direction, and in this embodiment, the washing tank 7 is rotated at a high speed clockwise when viewed from above.

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

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

Since the first side surface 20a of the mounting part 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 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, suppress the generation of turbulent flow, and suppress the generation of vibration.

Although the second side 20b is formed approximately vertically for the installation of the heating device 19, since it is located on the downstream side of the flow accompanying the rotation of the washing tub 7 compared to the first side 20a, it does not hinder the flow and does not cause Turbulence.

The top of the heating device 19 is covered by the heating plate 25. In addition, since the heating plate 25 is arranged at approximately the same height as the bottom surface of the water tank 5 and the top surface of the installation part 20, the flow of the washing liquid flowing in the water tank 5 will not be 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 . During 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 the position facing the heating device 19 with respect to the rotating shaft 6 in the water tank 5 will flow out from the drain port 18 without passing through the heating device 19. . Since the amount of 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 .

When maintenance of the heating device 19 is required, such as when a failure occurs in the heating device 19 , first, the washing machine is rotated to a position facing the door 3 , and the door 3 is detached from the casing 1 . Since the heating device 19 is arranged at a position facing the opening 2 after the door body 3 is disassembled, the heating device 19 can be confirmed visually by disassembling the door body 3 .

The heating device 19 can be detached from the water tank 5 by detaching the wires 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 from the water tank 5, maintenance can be carried out. In the case of replacing the heating device 19 with a new heating device 19, the new heating device 19 is inserted into the installation opening 21 of the installation part 20 of the water tank 5, and the fixing screws are screwed together to fix the heating device 19 to the water tank 5. Thereafter, wiring is attached to the terminals of the heating device 19 . Finally, the maintenance is completed by installing the door body 3 on the casing 1 and restoring 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 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 outer side of the bottom surface of the water tank 5 , including the outer side surface of the concave portion 17 . By increasing the height of the outer peripheral side of the outer surface of the concave portion 17 , the height of the reinforcing rib 31 located on the outer 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 installed substantially parallel to the bottom surface of the recessed portion 17, and is arranged at an inclination so that the water outlet 18 side becomes lower with respect to the horizontal plane. Since the heating device 19 is disposed substantially parallel to the bottom surface of the recess 17, it is less likely to be a resistance to the drainage flowing toward the drain port 18, and lint contained in the drainage can be prevented from being entangled with the heating device 19.

In this embodiment, although the opening 2 is formed on the back side of the casing 1, it may also be formed on the side of the casing 1, and the heating device 19 is made to face the opening 2 on the side of the casing 1, and the opening may also be 2 is formed on the front of the casing 1, and makes the heating device 19 face the opening 2 at the front of the casing 1.

By arranging the opening 2 on the side or front of the housing 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 of main parts viewed from above of the washing tub of the washing machine according to the second embodiment of the present invention. Fig. 14 is a sectional view of main parts of a washing tub of a washing machine according to a second embodiment of the present invention.

This embodiment is all the same as the first embodiment except that the heating plate 35 with 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 the first embodiment will be added. The same symbols are used and their explanations are omitted.

A heating plate 35 is disposed above the heating device 19 . The heating plate 35 is made of metal, in this embodiment, stainless steel. The heating device 19 is covered by the heating plate 35 . Since the heating device 19 is covered by the heating plate 35 , heat from the heating device 19 can be suppressed from being directly transmitted to the washing tub 7 , thereby suppressing thermal deterioration of the bottom 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 surface 20b side of the mounting part 20 is mounted so as to be in contact with or close to the second side surface 20b of the mounting part 20 . The side 35c of the heating plate 35 located on the outer peripheral side of the recessed portion 17 is mounted in a state of being in contact with or close to the outer peripheral side of the recessed portion 17 . The side 35d of the heating plate 35 positioned at the center side of the recess 17 is mounted in a state of being in contact with or close to the side surface of the center of the recess 17 . The side 35c and the side 35d of the heating plate 35 are formed with an arc-shaped notch 35h, and the washing liquid is configured to convect through the notch 35h. The edge 35e of the heating plate 35 on the rotation direction side of the washing tub 7 is spaced from the side surface of the recessed portion 17 .

The heating plate 35 is installed with an inclination gradually increasing 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 the present embodiment, the inclination angle of the heating plate 35 with respect to the horizontal is set to 3 degrees. In the washing machine of this embodiment, the allowable inclination at the time of installation is set to 2 degrees relative 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 surface.

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 through 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 the stroke of heating the washing liquid for 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 will move upward. The heating plate 35 located above the heating device 19 is arranged so as to be gradually higher towards the side 35e, so the heated washing liquid will be guided to the side 35e along the heating plate 35, and from the side 35e to the side 35e. The side moves to above the heating 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 heating plate 35 has a notch 35h formed on the side 35c and the side 35d, the washing liquid flows into the bottom of the heating plate 35 through the notch 35h from the substantially opposite sides of the heating plate 35, that is, the side 35c and the side 35d. Since the washing liquid flows into the bottom of the heating plate 35 from two substantially opposite sides of the heating plate 35, that is, the side 35c and the side 35d, 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 arranged obliquely, the washing liquid heated by the heating plate 35 can be efficiently guided upward. Since the upper side of the heating device 19 is covered by the heating plate 35 , it is possible to suppress foreign matter from contacting the heating device 19 by the heating plate 35 .

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 will be guided to the drain port 18 by the heating plate 35, and the lint contained in the drain water can be prevented from being entangled in the water tank 5. Heating device 19.

As explained above, the washing machine according to the first invention includes: a housing; a water tank disposed in the housing; a washing tank rotatably disposed in the water tank; a driving device for rotating and driving the washing tank; and a heating device disposed in the water tank. in the sink and warm up the washing liquid. The heating device is mounted on a mounting portion formed on the water tank, and the mounting portion is formed by inclining the first side surface substantially perpendicular to the rotating direction of the washing tank during dehydration toward the rotating direction side of the washing tank.

With this configuration, when the washing tank is rotated in the dehydration step, an airflow is generated in the water tank due to the rotation of the washing tank, and the dehydrated washing liquid flows together with the airflow. Since the first side surface of the installation part of the heating device is inclined toward the rotation direction side of the washing tank, the flow accompanying the rotation of the washing tank will be guided along the inclination of the first side surface, which can prevent the flow from being blocked and prevent chaos. The generation of flow, and suppress the generation of 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 a second side surface of the attachment portion substantially perpendicular to the first side surface.

With this structure, although the second side is formed approximately vertically for the installation of the heating device, since it is located on the downstream side of the flow accompanying the rotation of the washing tub compared to the first side, the flow will not be hindered and the flow will not be disturbed. Create turbulence.

In the washing machine of the third invention, in any one of the first invention or the second invention, a drain is formed in the water tank, and the bottom of the water tank is formed so as to gradually become lower toward the drain, and the heating device is arranged so as to be approximately equal to the bottom of the water tank. Parallel is also possible.

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 be a resistance to the drainage flowing toward the drain port, and 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, a heat insulating board may be arranged between the bottom surface of the water tank and the heating device, and the heat insulating board will transmit the heat of the heating device to the bottom surface of the water tank. Insulate from heat.

With this configuration, it is possible to prevent the heat generated by the heating device from being directly transmitted to the bottom surface of the water tank, thereby suppressing thermal deterioration 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 arranged between the bottom surface of the washing tank and the heating device, and the heating plate may cover the upper part of the heating device.

With this configuration, it is possible to prevent the heat generated by the heating device from being directly transmitted to the bottom of the washing tub, thereby suppressing thermal deterioration of the bottom of the washing tub.

Moreover, since the heating plate covers the heating device, the flow of the washing liquid flowing in the water tank will not be hindered by the heating device, and the generation of turbulent flow can be suppressed.

The washing machine according to the sixth invention includes: a housing; a water tank disposed in the housing; a washing tank rotatably disposed in the water tank; a driving device for rotating and driving the washing tank; a drain formed on the bottom of the water tank The washing liquid is drained; and the heating device is arranged at the bottom of the water tank and heats the washing liquid. Arrange the drain port and the heating mechanism at separate locations.

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 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.

In the washing machine of the seventh invention, especially in the sixth invention, a heat insulating board may be provided between the bottom of the water tank and the heating device, and the heat insulating board insulates heat from the heating device transmitted to the bottom of the water tank.

With this configuration, it is possible to prevent the heat generated by the heating device from being directly transmitted to the bottom surface of the water tank, thereby suppressing thermal deterioration 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 arranged between the bottom surface of the washing tank 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 generation of turbulent flow can be suppressed.

The washing machine according to the ninth invention includes: a casing; a water tank arranged in the casing; a washing tank rotatably arranged in the water tank; a driving device for rotating and driving the washing tank; and a heating device arranged in the water tank for heating and washing. liquid. The housing has an opening that can be freely opened and closed by the door body, and an installation portion that can be installed with a heating device is provided in the water tank, and an installation opening is formed on the installation portion at a position facing the opening. The above-mentioned installation opening is for heating. The unit 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 the heating device fails, after the washing machine is rotated to a position facing the door and the door is detached from the casing, the heating device is arranged on the surface. For the position of the opening after the door is disassembled, the maintenance of the heating device can be performed by disassembling the door.

In the washing machine of the tenth invention, especially 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 cannot be seen, and the appearance will not be spoiled.

In the washing machine of the eleventh invention, especially 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 board may be arranged between the bottom surface of the water tank of the washing machine and the heating device. The heat generated by the heating device is insulated.

With this configuration, it is possible to prevent the heat generated by the heating device from being directly transmitted to the bottom surface of the water tank, thereby suppressing thermal deterioration of the bottom surface of the water tank.

In the washing machine of the thirteenth invention, especially in any one of the ninth invention to the eleventh invention, a heating plate may be arranged between the bottom surface of the washing tank 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 generation of turbulent flow can be suppressed.

The heated water generating device of the fourteenth invention includes: a water tank; a heating device disposed at the bottom of the water tank to heat the liquid in the water tank; a temperature sensor disposed on the heating device; and a heating plate disposed above the heating device into a covered heating unit. 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 caused by 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 upward through the through hole, so stable temperature detection can be performed.

A washing machine according to a fifteenth invention is a washing machine provided with the heated water generating device according to 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 caused by 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 upward through the through hole, so stable temperature detection can be performed.

The washing machine according to the sixteenth invention includes: a casing; a water tank arranged in the casing; a washing tank rotatably arranged in the water tank; a pulsator rotatably arranged in the inner bottom of the water tank; a driving device for rotating and driving washing. A tank and a pulsator; a circulation path, connected to the washing tank so that the water in the washing tank can circulate; and a circulation pump, forming a water flow in the circulation path. Equipped with: a heating device, which is arranged in the water tank and heats the washing liquid; and a control device, which controls the driving device, the circulation pump, and the heating device. The control device will make the circulation pump and the heating device act simultaneously.

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

In the washing machine of the seventeenth invention, in the sixteenth invention, when the amount of water in the washing tub is larger than the specified amount, the control device will cause the circulation pump and the heating device to operate simultaneously, and the amount of water in the washing tub will exceed the specified amount. When it is small, only the heating device may be operated.

With this configuration, when the amount of washing liquid in the washing tank is larger than the specified amount, the heating device and the circulation pump are simultaneously operated, whereby the washing water in the upper and lower parts of the washing tank can be mixed and the temperature can be raised evenly. In addition, when the amount of washing liquid in the washing tub is less than a predetermined amount, only the heating device is operated, so that the temperature of the washing water can be raised evenly without using extra power.

In the washing machine of the eighteenth invention, in either invention of the sixteenth invention or the seventeenth invention, when the amount of clothes in the washing tub by the control device is more than a predetermined amount, the circulation pump and the heating device are operated simultaneously, and the clothes in the washing tub When the amount of clothes inside is less than the prescribed amount, only the heating device may be activated.

With this configuration, when the amount of clothes in the washing tub is larger than a predetermined amount, the heating device and the circulation pump are simultaneously operated, thereby making it possible to average the temperature of the washing liquid contained in the clothes in the upper and lower parts of the washing tub. In addition, when the amount of clothes in the washing tub is less than a predetermined amount, only the heating device is activated, so that the temperature of the washing water contained in the clothes can be raised evenly without using extra power.

The washing machine of the nineteenth invention has a discharge port located in the middle 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 is less than a predetermined amount, the control device will Only the pulsator is operated after energizing the heating device, and when the amount of water in the washing tub is larger than the specified amount, the circulation pump may be operated while energizing the heating device.

With this configuration, when the amount of washing liquid in the washing tub is less 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 power. Also, when the amount of washing liquid in the washing tank is larger than the predetermined amount, the heating device and the circulation pump will be operated at the same time, so that the washing water in the upper and lower parts of the washing tank will mix, and the temperature can be raised evenly.

In the washing machine of the 20th invention, in any one of the 16th invention or the 17th 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 clothes in the washing tub is more than the predetermined amount, the circulation pump is activated while the heating device is energized.

With this configuration, when the amount of laundry in the washing tub is less 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 power. Also, when the amount of clothes in the washing tank is more than the specified amount, the heating device and the circulation pump will be operated at the same time, so that the washing water in the upper and lower parts of the washing tank will mix, and the temperature can be raised evenly.

The washing machine of the twenty-first invention includes: a housing; a water tank arranged in the housing; a washing tank rotatably arranged in the water tank; a driving mechanism for rotating and driving the washing tank; a heating device arranged 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 the top to the washing tank. The circulation water port leading to the circulation path is formed at the bottom of the tank.

With this structure, the washing solution at the bottom of the tank heated by the heating device can be circulated to the upper part of the tank, so the overall temperature of the washing solution in the tank can be efficiently raised, and uneven washing can be reduced, making it easier for dirt to be absorbed. remove.

In the washing machine of the 22nd invention, especially in the 21st invention, the circulating nozzle 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 according to the twenty-third invention, in any one of the twenty-first invention or the twenty-second invention, the circulating nozzle may be formed by protruding upward from the bottom surface of the water tank toward the heating device.

As the washing liquid warmed up by the heating device moves upward, the washing liquid with a relatively low temperature will flow in from the surroundings. However, with this configuration, the circulating water port is formed by protruding upward from the bottom of the tank toward the heating device. Therefore, it is possible to The washing liquid warmed by the heating device is efficiently guided to the circulation path.

As mentioned above, since the washing machine of the present invention can suppress the generation of vibration during spin-drying operation, it is also applicable to applications such as washing machines and washing machines for business use.

1: Shell 2: opening 3: door body 4: Upper shell 5: Sink 6: Rotation axis 7: Sink 7a: side wall 7b: bottom wall 8: Pulsator 8a: blade 9: Motor (drive device) 10: input port 11: cover body 12: Outer cover 13: Dehydration hole 14: Fluid balancer 15: Circulating waterway cover 16: spit out 17: Concave 18: Outlet 19: Heating device 20: Installation department 20a: 1st side 20b: 2nd side 21: Install the opening 22: Mounting plate 23: Temperature sensor 24: heat shield 25,35: heating plate 25a: Through hole 25b, 25c, 25d, 25e, 25f, 35b, 35c, 35d, 35e: side 25g, 35g: through hole 26: Rib 27:Circulation pump 28: Loop Road 29: water injection port 30: Operation display device 31: Reinforcing rib 32: Circulation nozzle 33: Control device 35h: Notch 62: water supply port 63,71: sink 64: Main waterway 65: Bypass path 66: switch valve 67: heater 72: Heater 73: Concave 74: fixed part A: arrow

Fig. 1 is an exploded perspective view of a state in which a door body of a washing machine according to a first embodiment of the present invention is removed, viewed from the back side.

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

Fig. 3 is a cross-sectional view showing the circulation 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 according to the first embodiment of the present invention viewed from above.

Fig. 5 is an enlarged view of main parts of the water tank of the washing machine according to the first embodiment of the present invention.

Fig. 6 is a plan view of the water tank of the washing machine according to the first embodiment of the present invention, when the heating plate of the water tank is removed, viewed from above.

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

Fig. 8 is an enlarged plan view of main parts of the water tank of the washing machine according to the first embodiment of the present invention.

Fig. 9 is an enlarged sectional view of main parts of the water tank of the washing machine according to the first embodiment of the present invention.

Fig. 10 is a perspective view of the water tank of the washing machine according to the first embodiment of the present invention viewed from below.

Fig. 11 is a perspective view of the water tank of the washing machine according to the first embodiment of the present invention viewed from above.

Fig. 12 is an enlarged plan view of main parts viewed from above of the water tank of the washing machine according to the first embodiment of the present invention.

Fig. 13 is an enlarged plan view of main parts viewed from above of the water tank of the washing machine according to the second embodiment of the present invention.

Fig. 14 is an enlarged sectional view of main parts of a water tank of a washing machine according to a second embodiment of the present invention.

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

Fig. 16 is a perspective view of a sink of a conventional washing machine.

5: Sink

17: Concave

19: Heating device

20: Installation department

20a: 1st side

A: arrow

Claims (6)

A washing machine is characterized in that: case; a water tank arranged in the aforementioned housing; The washing tank is freely rotatably arranged in the aforementioned water tank; a driving mechanism, which rotates and drives the aforementioned washing tank through a rotating shaft extending in a slightly vertical direction; and The heating device is arranged in the aforementioned water tank to heat the washing liquid, There is an opening that can be freely opened and closed by the door body on the front, back or side of the aforementioned casing, and an installation portion that can be installed with the aforementioned heating device is provided at the bottom of the aforementioned water tank, and the side of the aforementioned installation portion faces the aforementioned The position of the opening forms an opening, and the opening is for inserting the heating device into the water tank from the outside of the water tank, and the side of the installation part on which the installation opening is formed is provided in the installation part for dehydration When it is the downstream side of the rotation direction of the aforementioned washing tank. The washing machine according to claim 1, wherein the side surface of the installation portion on which the installation opening is formed is formed along a substantially vertical direction. The washing machine according to claim 1, wherein the side surface of the mounting portion on which the opening is formed is formed to be approximately perpendicular to the rotation direction of the washing tub. The washing machine according to any one of claims 1 to 3, wherein a heat insulating board is arranged between the bottom surface of the water tank and the heating device, and the heat insulating board insulates heat transmitted from the heating device to the bottom surface of the water tank. The washing machine according to any one of claims 1 to 3, wherein a heating plate is arranged between the bottom surface of the washing tank and the heating device, and the heating plate covers the upper part of the heating device. The washing machine according to claim 4, wherein a heating plate is arranged between the bottom surface of the washing tank and the heating device, and the heating plate covers the upper part of the heating device.

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