JP2020080948A - Washing machine - Google Patents

Abstract

To provide a highly reliable washing machine with improved attachability of an impeller and reduced residual unbalance of the machine including the impeller, causing low noise and less vibration.SOLUTION: A washing machine comprises a rotary tub for accommodating clothing, a casing for supporting the rotary tub, an impeller having a plurality of vanes for sending dry air into the rotary tub, and a motor for driving the impeller. The axis of rotation of the motor has an installation surface on which the impeller is installed. The surface area of the installation surface is larger than the cross sectional area of the axis of rotation of the motor in the radial direction.SELECTED DRAWING: Figure 5

Description

The present invention relates to a washing machine for washing clothes and the like.

Drying clothes with a washer/dryer that can be performed continuously from washing to drying creates high-temperature, low-humidity air with an impeller and a heat source, and blows this into the washing tub to raise the temperature of the clothes and remove moisture from the clothes. This is done by evaporating and discharging the evaporated water to the outside of the machine.

A blower unit for circulating the dry air is built in the casing of the washer/dryer. The blower unit includes an impeller and a heating means using, for example, a PCT thermistor, and various technical proposals have been made to efficiently heat the air.

For example, there is a blower unit described in Patent Document 1 as a blower unit for a washer/dryer that can continuously perform from washing to drying. According to this, the air-blowing unit is provided with the central anti-vibration rubber and the outer anti-vibration rubber, and the central part of the fan case and the central part of the drive motor are elastic with the central anti-vibration rubber having high rubber hardness. It is joined. As a result, even if the strong suction action of the impeller during dry operation acts on the axis of the rotating shaft, it is elastically supported by the central anti-vibration rubber with high rubber strength, so it can move greatly in the axial direction. Is preventing. Also, the drive motor is vibrated by the residual unbalanced centrifugal force including the impeller, but the radial movement of the outer peripheral anti-vibration rubbers arranged on the outer peripheral side part is restricted, so that the residual Since the vibration due to the balanced centrifugal force changes to butterfly vibration with the central vibration isolating rubber as a fulcrum, the outer circumference has a large amplitude, and vibration is suppressed by being supported by the outer vibration isolating rubber with low rubber strength. For vibrations caused by residual unbalanced centrifugal force, including the impeller mounted on the rotary shaft of the drive motor for driving the impeller, install a rubber anti-vibration rubber between the drive motor and fan case. It is used to suppress the transmission of vibrations to the blower unit to reduce vibrations.

JP, 2012-70946, A

However, in the washer/dryer provided with the blower unit of Patent Document 1, a blower unit for vibrating by residual unbalanced centrifugal force, which includes an impeller attached to the rotary shaft of a drive motor for driving the impeller. However, no consideration is given to reducing the residual imbalance including the impeller.

SUMMARY OF THE INVENTION An object of the present invention is to provide a washing machine having improved impeller mountability, reduced residual imbalance including the impeller, high reliability, low noise and low vibration.

In order to solve the above problems, the washing machine of the present invention includes a rotary tub for storing clothes, a housing for supporting the rotary tub, and an impeller having a plurality of blades for sending dry air into the rotary tub. And a motor for driving the impeller, the rotation shaft of the motor has an installation surface on which the impeller is installed, and the surface area of the installation surface is wider than the cross-sectional area of the diameter of the rotation shaft of the motor. To do.

In addition, a rotary tank that stores clothes, a housing that supports the rotary tank, an impeller having a plurality of blades for sending dry air into the rotary tank, and a motor that drives the impeller, The installation member is provided between the rotation shaft of the motor and the impeller, and the surface area of the installation member is larger than the cross-sectional area of the diameter of the rotation shaft of the motor.

ADVANTAGE OF THE INVENTION According to this invention, the attachability of an impeller is improved, the residual imbalance containing an impeller is reduced, a highly reliable, low noise and low vibration washing machine can be provided.

It is a figure showing one section of a vertical type washing and drying machine concerning the present invention. It is an external appearance perspective view of the ventilation unit shown in FIG. It is a perspective view which showed the inside of the ventilation unit shown in FIG. It is the perspective view which showed the inside of the impeller in the ventilation unit shown in FIG. It is the sectional view on the AA line of the ventilation unit shown in FIG. It is a figure which shows a part detail of the ventilation unit shown in FIG. It is a figure which shows one external appearance of the motor for ventilation of FIG. It is a figure which shows the other external appearance of the motor for ventilation of FIG. It is a figure which shows one external appearance when the cooling fan is provided in the motor for blowers of FIG. FIG. 10 is a sectional view taken along line BB of the blower motor shown in FIG. 9. It is a figure which shows the other cross section of the cooling fan of FIG. It is a figure which shows the other cross section of the ventilation unit shown in FIG. It is a figure which shows a part detail of the ventilation unit shown in FIG. It is a figure which shows one external appearance of the air blower motor of FIG. It is a figure which shows the other external appearance of the motor for ventilation of FIG. It is a figure which shows the other external appearance of the motor for ventilation of FIG. It is a figure which shows one external appearance at the time of providing a cooling fan in the air blow motor of FIG. It is a figure which shows one cross section of the cooling fan of FIG. It is a figure which shows the other cross section of the cooling fan of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 19, but the present invention is not limited to the following embodiments, and various modifications are made within the technical concept of the present invention. Examples and application examples are also included in the scope.

(First embodiment)
First, the configuration of the vertical washer/dryer will be briefly described with reference to FIG. The outer frame 1 which is the casing of the washer/dryer contains an outer tub 2 for storing washing water, and the outer tub 2 is vibration-supported by the outer frame 1. Inside the outer tub 2, there is provided a rotary tub 3 which is a washing/dehydrating tub for containing laundry such as clothes to be washed and dried. The rotary tub 3 rotates in the outer tub 2. Freely supported.

The stirring blade 4 for stirring and washing the laundry is rotatably provided in the rotary tub 3, and the stirring blade 4 is repeatedly rotated normally/reversely during the washing operation and the drying operation. Further, during the dehydration operation, the stirring blade 4 rotates at high speed together with the rotary tub 3, so that the water contained in the laundry in the rotary tub 3 is dehydrated.

The drive motor 10 drives the stirring blade 4 and the rotary tank 3 to rotate. A DC brushless motor is used as the drive motor 10, and the DC brushless motor is vector-controlled.

The outer lid 5 is openably and closably provided on the top cover 6 provided on the upper portion of the outer frame 1, and the inner lid 34 is openably and closably provided on the upper portion of the outer tank 2. By opening the outer lid 5 and the inner lid 34, laundry can be put in and taken out from the rotary tub 3.

The water supply unit 7 is provided on the back side of the top cover 6. The water supply unit 7 has a water supply box (not shown) having a plurality of water channels inside, and supplies tap water or bath water from the water supply hose connection port 8 to the outer tub 2. Further, the detergent/finishing agent charging device 35 is provided on the front side of the top cover 6, and the finishing agent is charged by a charging hose 36 between the outer tank 2 and the rotary tank 3.

The drying mechanism 9 circulates and dehumidifies the drying air for drying the laundry in the rotary tub 3, and the drying mechanism 9 is mostly occupied by the drying air circulation path. The drying air circulation path is connected so as to communicate with the bottom circulation path 20 connected to the bottom of the outer tub 2, the dehumidification vertical passage 21 rising from the bottom circulation path 20, and the upper side of the dehumidification vertical passage 21. The blower unit 22 is provided.

The blower unit 22 has an impeller 52 and an electric heater 24, which will be described in detail later. The suction side of the blower unit 22 is connected to the upper side of the dehumidification vertical passage 21, and the discharge side is connected so as to communicate with the return connection circulation passage 25.

The connection circulation path 25 has an upper bellows hose 23, and is connected so as to communicate with the upper part of the outer tub 2 via the upper bellows hose 23. The bottom circulation passage 20 also has a lower bellows hose 26, and is connected so as to communicate with the bottom of the outer tub 2 via the lower bellows hose 26.

The impeller 52 of the blower unit 22 causes the drying air to flow through the rotary tub 3 to dry the laundry in the rotary tub 3. Further, the electric heater 24 of the blower unit 22 reheats the drying air whose moisture is condensed in the dehumidifying region and flows through the rotary tub 3, so that the moisture of the laundry is further evaporated. By repeating this removal of water by circulating the drying air, the laundry can be well dried.

The lower bellows hose 26 is connected to the bottom drop part 31 of the outer tub 2, and the bottom drop part 31 communicates with the wash water drainage channel 42 and the wash water circulating water channel 43 via the lower communication pipe 41. A lower communication pipe 41 communicates with the washing water drainage channel 42 via a drain valve 44, and the washing water circulation water channel 43 communicates with the lower communication pipe 41 via a foreign matter removal trap 32.

The drain valve 44 is closed during the washing operation and the drying operation, and the drain valve 44 is opened to drain the washing water and during the drying operation, the washing water and the rinse water accumulated in the outer tub 2 are washed and dried. Drain to the outside.

The washing water circulating water vertical passage 46 connected to the end of the washing water circulating water passage 43 rises along the outer surface of the outer tub 2, extends to the upper side of the rotating tub 3, and is provided on the upper side of the rotating tub 3 to serve as a washing thread waste removing device. Connected to communicate.

The wash water and rinse water collected in the outer tub 2 flow through the wash water circulating water vertical channel 46 and are poured from the washing thread waste removing device to be sprayed on the rotary tub 3. Since washing and rinsing are performed while the sprayed water continues, washing and rinsing are performed with a small amount of water.

The water level sensor 47 detects the water levels of washing water and rinse water accumulated in the outer tub 2. The outer tank 2 is provided with an air trap near the bottom and an air tube 49 connected so as to communicate with the air trap. The water level sensor 47 is connected to the upper end of the air tube 49 so as to communicate therewith. The water level sensor 47 detects the water level fluctuation in the outer tub 2 to detect the water level.

Next, the blower unit 22 will be described with reference to FIGS. 2, 3, 4, and 5. The blower unit 22 has a front side unit case 50, a back side unit case 51, an impeller 52, and an electric heater 24 for heating. The front side unit case 50 and the back side unit case 51 are combined to form a unit case. An impeller 52 and an electric heater 24 for heating are arranged inside the unit case. A PTC thermistor is used as the electric heater 24, and the heater of the PTC thermistor having a long rod shape uniformly generates heat throughout the whole and heats the air from the impeller 52 flowing by touching a large number of fins.

The front side unit case 50 and the back side unit case 51 have a casing portion 54 in which the impeller 52 is arranged and a heater chamber 55 in which the electric heater 24 is arranged. The impeller 52 is a centrifugal fan that is rotated at high speed to send out air. The plurality of blades 56 of the impeller 52 have an arc shape, and the 12 blades 56 are arranged at an equal pitch. The impeller 52 is driven by a motor, specifically, a blower motor 100.

The front unit case 50 has a suction port 57 and a discharge port 58. The suction port 57 is located in the center of the casing 54 so as to face the center of the impeller 52 on the suction side. The discharge port 58 is arranged at the position of the heater chamber 55 on the downstream side of the electric heater 24. The suction port 57 communicates with the dehumidification vertical passage 21 via a drying filter (drying filter device), and the discharge port 58 communicates with the connection circulation passage 25 of the drying air circulation passage.

The casing portion 54 has a discharge port 59, and a scroll surface 60 is formed. The scroll surface 60 has a final end portion 61 on the rear end side and a tongue end portion 62 on the front end side in the rotational direction of the impeller 52. The tongue end portion 62 is formed so as to be close to the outer peripheral surface of the impeller 52, and the final end portion 61 is formed so as to be separated from the outer periphery of the impeller 52. The scroll surface 60 facing the outer peripheral surface of the impeller 52 is formed in an involute shape that gradually expands from the tongue end portion 62 to the final end portion 61.

FIG. 5 is a cross-sectional view of the blower unit 22 of the present embodiment taken along the line AA, showing the impeller 52, the blower motor 100, and the rotating shaft 101 thereof, and FIG. 6 is a detailed view thereof. FIG. 7 shows the external appearance of the blower motor 100. As shown in FIGS. 5, 6, and 7, the blower motor 100 has an installation surface 102 on which the impeller 52 is installed. Although the rotating shaft 101 and the installation surface 102 are integrated in this embodiment, they may be separated. The installation surface 102 of the rotary shaft 101 of the blower motor 100 with the impeller 52 is made wider than the diameter of the rotary shaft 101, that is, the surface area of the installation surface 102 is larger than the cross-sectional area of the diameter of the rotary shaft 101 of the blower motor 100. By also increasing the width, the contact area between the impeller 52 and the rotating shaft 101 is expanded, the inclination of the impeller 52 is reduced, and the attachment of the impeller 52 is stabilized. Therefore, by reducing the residual imbalance of the rotating portion including the impeller 52, it is possible to reduce the vibration due to the centrifugal force of the residual imbalance of the rotating portion, and to reduce noise and vibration.

Further, FIG. 7 is an external view in which the blower motor 100 of FIG. 5 is turned upside down. Although the installation surface 102 of the rotary shaft 101 of the blower motor 100 is circular in FIG. 7, it may be polygonal like the installation surface 112 shown in FIG. Further, if the installation surface 112 is wider than the diameter of the rotating shaft 111 of the blower motor 110, it may have any other shape.

Next, FIG. 9 shows a cooling fan 123 (fan) on the opposite side (lower side in FIG. 9) of the installation surface 122 of the rotating shaft 121 of the blower motor 120, that is, between the installation surface 122 and the blower motor 100. It is an external view which provided the fan 123.

By providing the cooling fan 123 on the opposite side (the lower side in FIG. 9) of the installation surface 122 of the rotation shaft 121 of the blower motor 120, the rotation of the rotation shaft 121 of the blower motor 120 causes the cooling fan 123 to also rotate. However, wind is generated. By applying the generated wind to the blower motor 120, cooling of the blower motor 120 can be promoted. Further, by sucking out the air inside the blower motor 120 from the gap between the bearings 125, the moisture inside the blower motor 120 can be discharged and the rust of the internal parts can be suppressed. Therefore, the temperature rise of the blower motor 120 can be suppressed and the rust inside the blower motor 120 can be suppressed, resulting in higher reliability.

Further, FIG. 10 shows a sectional view taken along line BB of FIG. As shown in FIG. 10, the blades of the cooling fan 123 provided on the opposite side of the installation surface 122 have a straight shape (linear shape). Next, FIG. 11 shows the shape of the cooling fan 133 provided on the opposite side of the installation surface 132. As shown in FIG. 11, the shape of the blades of the cooling fan 133 may be an arc shape, and may be any other shape as long as the same effect can be obtained.

Further, in FIGS. 10 and 11, the rotating shaft 121 and the cooling fans 123 and 133 provided on the rotating shaft 131 have a total of 12 sheets at an equal pitch, but other numbers may be used as long as the same effect can be obtained, They may be arranged at unequal pitches.

(Second embodiment)
Next, a second embodiment will be described. Since the structure of the washer/dryer is similar to that of the first embodiment, the blower fan unit 205 will be described.

FIG. 12 is a cross-sectional view of the blower unit 205 of this embodiment, and FIG. 13 is its detailed view. FIG. 14 shows the external appearance of the blower motor 200. The blower unit 205 includes a front side unit case 206 and a back side unit case 207.

As shown in FIGS. 12, 13, and 14, an installation member 203 is provided between the rotary shaft 201 of the blower motor 200 and the impeller 208. Specifically, an installation member 203 having a cylindrical portion 204 is arranged between the installation surface 202 of the rotary shaft 201 of the blower motor 200 and the impeller 208, and the surface area of the installation member 203 is set to the rotary shaft 201. That is, the surface area of the installation member 203 is made larger than the cross-sectional area of the diameter of the rotating shaft 201 of the blower motor 200. As a result, the contact area between the impeller 208 and the rotating shaft 201 is expanded. The installation member 203 comes into contact with the rotating shaft 201 and the cylindrical portion 204 is installed, so that the rotating member 201 of the blowing motor 200 comes into contact with the cylindrical portion 204 of the installation member 203, and the impeller 208 is tilted. The number of blades is reduced, and the installation of the impeller 208 is stabilized. Therefore, noise and vibration can be reduced by reducing the residual unbalance of the rotating portion including the impeller 208 and reducing the vibration due to the centrifugal force of the residual unbalance of the rotating portion.

Further, FIG. 14 is an external view in which the blower motor 200 of FIG. 12 is turned upside down. Although the cylindrical portion 204 of FIG. 14 has a gap with the bearing 209 of the blower motor 200, it may be a cylindrical portion 214 that contacts the bearing 215 of the blower motor 210 as shown in FIG. That is, the cylindrical portion 214 and the bearing 209 provided between the installation member 203 and the blower motor 200 may be in contact as shown in FIG. 14 or may be non-contact as shown in FIG.

By contacting the bearing 215 of the blower motor 210 with the cylindrical portion 214, the inclination of the impeller 208 is further reduced and the attachment of the impeller 208 is stabilized. Therefore, noise and vibration can be reduced by reducing the residual imbalance of the rotating portion including the impeller 208 and reducing the vibration due to the excitation of the centrifugal force of the residual imbalance of the rotating portion including the impeller 208. it can. Further, since the cylindrical portion 214 of the installation member 213 contacts the bearing 215 of the blower motor 210, the installation of the impeller 208 is stabilized, so the installation member 213 has a gap with the installation surface 202 of the blower motor 210. It may be. When installing the installation member 203, the installation member 203 may be fitted with a gap with the rotation shaft 201 of the blower motor 200, or may be press-fitted.

Further, the shape of the installation member 203 may be polygonal like the installation member 223 shown in FIG. 16 as long as the diameter of the rotating shaft 201 of the blower motor 200 is made wider. If the installation surface 223 is wider than the diameter of the rotary shaft 221 of the blower motor 220, it may have any other shape.

Next, FIG. 17 is an external view in which a cooling fan 235 is provided on the bearing 236 side of the installation member 233 of the blower motor 230.

A fan, specifically, a cooling fan 235 is provided on the bearing 236 side of the installation member 233, that is, by providing the cooling fan 235 between the installation member 233 and the air blowing motor 200, the rotation shaft 231 of the air blowing motor 231 rotates. By doing so, the cooling fan 235 also rotates and wind is generated. By applying the generated wind to the blower motor 200, cooling of the blower motor 200 can be promoted. Further, by sucking out the air inside the blower motor 200 from the gap of the bearing 236, it is possible to suppress moisture and suppress rust of internal parts. Therefore, the temperature rise of the blower motor 200 can be suppressed and the rust inside the blower motor 200 can be suppressed, resulting in higher reliability.

Next, FIG. 18 shows the shape of the cooling fan 235 provided on the installation member 233. As shown in FIG. 18, the blades of the cooling fan 235 provided on the installation member 233 have a straight shape (linear shape).

Next, FIG. 19 shows the shape of the cooling fan 245 provided on the installation member 243. As shown in FIG. 19, the blades of the cooling fan 245 provided on the installation member 243 may have an arc shape, or may have another shape as long as the same effect can be obtained.

18 and 19, the cooling fan 235 and the cooling fan 245 have a total of 12 sheets at equal pitches, but if the same effect is obtained, other numbers may be used, and they may be arranged at unequal pitches. good.

It should be noted that the present invention is not limited to the above-described embodiments, but includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment. Further, with respect to a part of the configuration of each embodiment, other configurations can be added/deleted/replaced.

1 Outer Frame 2 Outer Tank 3 Rotating Tank 22 Blower Unit 50 Front Unit Case 51 Back Unit Case 52 Impeller,
54 Casing Part 55 Heater Chamber 56 Blade 100 Blower Motor 101 Rotating Shaft 102 Installation Surface 123 Cooling Fan 125 Bearing 213 Installation Member 214 Cylindrical Shaped Part

Claims (8)

A rotating tank to store clothes,
A housing that supports the rotary tank,
An impeller having a plurality of blades for sending dry air into the rotary tank,
A motor for driving the impeller,
The rotating shaft of the motor has an installation surface on which the impeller is installed,
The surface area of the installation surface is larger than the cross-sectional area of the diameter of the rotating shaft of the motor. A rotating tank to store clothes,
A housing that supports the rotary tank,
An impeller having a plurality of blades for sending dry air into the rotary tank,
A motor for driving the impeller,
An installation member provided between the rotary shaft of the motor and the impeller,
The surface area of the installation member is larger than the cross-sectional area of the diameter of the rotating shaft of the motor. The washing machine according to claim 1 or 2, wherein
The washing machine, wherein the installation surface or the installation member is circular or polygonal. The washing machine according to claim 1,
A washing machine having a fan between the installation surface and the motor. The washing machine according to claim 2,
A washing machine having a fan between the installation member and the motor. The washing machine according to claim 4 or 5, wherein:
The vane of the fan has a linear shape or an arc shape. The washing machine according to claim 2,
The installation member has a cylindrical portion installed in contact with the rotating shaft. The washing machine according to claim 7,
A bearing between the installation member and the motor,
A washing machine in which the cylindrical portion and the bearing are installed in contact or non-contact with each other.

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