JP2009232921A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum type washing machine can improve dehydrating performance by high-speed spin dry, and reducing wear of bellows in the high-speed spin dry. <P>SOLUTION: The mobile amount of a water tub in the high-speed spin dry is reduced by suppressing air to escape from the outer peripheral side of the water tub toward outer air in the high-speed spin dry of water, taking in the outer air to the inner peripheral side of the drum, arranging a circulation air flow passage for connecting the outer peripheral side of the water tub with high pressure to the inner peripheral side of the water tub with low pressure, and rotating a blow fan for drying so as to forcibly supply air to the inner peripheral side with low pressure. Besides, the mobile amount of the water tub in the high-speed spin dry is reduced by arranging a spring to be changed in the constant of a spring by a displacement amount or a spring arranged at interval with the water tub, in the front and rear direction of the water tub. Consequently, the dehydrating performance is improved by the high-speed spin dry, and reliability is improved by reducing the wear of the bellows in the high-speed spin dry. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a drum type washing machine, and more particularly to an improvement in dewatering performance and high reliability of a drum type washing machine.

  A conventional drum type washing machine is disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-159494. The drum type washing machine described in this prior art has a large number of water passage holes on the outer peripheral side, a drum that rotates to wash and dehydrate laundry, a water tank that contains the drum, and vibration of the water tank. A weight provided in the aquarium, a washing machine outer frame that houses the aquarium, a vibration-proof spring that is installed between the aquarium and the washing machine outer frame and receives the load of the aquarium, and a tank and a washing machine outer frame. It is equipped with an anti-vibration damper that is installed in between and suppresses vibrations of the water tank, a motor that drives the drum, and a rotating shaft that has one end fixed to the rotation center of the drum.

  Further, during the washing / rinsing process, the drum is driven to rotate at a low speed by a motor, and the laundry in the drum is lifted and dropped on the water surface for washing / rinsing. At the time of the dehydration process, the drum is rotated at a high speed and the water in the laundry is drained by centrifugal force to perform dehydration. In this dehydration process, the drum is rotated as fast as possible in order to increase the centrifugal force applied to the laundry during dehydration with the aim of improving dewatering performance (reducing moisture content) in order to improve rinsing performance and shorten the drying time. Dehydration is performed. In order to prevent wear of the bellows and the like during this high-speed rotation dehydration, each part of the bellows has a shape with a sufficient gap.

JP 2003-159494 A

  As described above, in order to improve the dewatering performance, we want to rotate the drum as fast as possible, but the centrifugal force generated by the rotation of the drum causes the air in the drum to move to the outer peripheral side, and inside the water tank. A phenomenon occurs in which the pressure on the outer peripheral side is high and the pressure on the inner peripheral side is low. At this time, the space formed by the charging port lid, bellows, and drum opening provided in the outer frame is also connected to the inner peripheral side of the water tank (drum), and thus has a negative pressure. The force to become is generated. When the space becomes smaller, the charging port lid is fixed, so that the most movable water tank moves forward while compressing and deforming the bellows so as to be sucked by the charging port lid. In this phenomenon, the pressure difference between the inner and outer circumferences increases as the drum rotates at a higher speed. Therefore, the amount of movement of the water tank increases as the number of rotations increases. In this way, when the amount of movement of the water tank increases, the gap provided for preventing the wear of the bellows decreases, the bellows come into contact with each other, the water tank and the bellows come into contact, and the bellows is damaged. There was a problem that. In addition, when the washing machine main body is downsized and the drum diameter is increased, the space for placing the bellows is reduced to less than before, and the gap between each part, which is the purpose of preventing the wear of the bellows, cannot be taken sufficiently. There was also a problem that it was difficult to perform dehydration at the above rotational speed.

  An object of the present invention is to provide a drum-type washing machine having a high dewatering performance and high reliability by reducing the amount of water tank movement when dewatering at high speed rotation in order to improve the dewatering performance.

  In order to solve the above-described problems, a drum-type washing machine of the present invention includes a water tub disposed in an outer frame of the washing machine, a drum that is rotatably provided in the water tub and that stores laundry, and the drum. An anti-vibration spring that is installed between the outer frame of the washing machine and the aquarium and receives the load of the aquarium, and an anti-vibration damper that is installed between the aquarium and the outer frame to suppress vibration of the aquarium And a drum-type washing machine comprising a slot for feeding clothes on the front surface of the outer frame of the washing machine and a bellows connecting the slot to the water tank, wherein the drain valve is closed during dehydration.

  In other words, the air that escapes from the outer periphery of the water tank to the outside air is suppressed, the outside air is taken into the drum inner periphery, a circulation air passage that connects the high pressure water tank outer periphery side and the low pressure water tank inner periphery side, etc. By rotating the blower fan and forcibly sending air to the inner peripheral side where the pressure is low, the amount of movement of the water tank during high-speed rotation dehydration can be reduced. Moreover, the movement amount of the water tank at the time of high-speed rotation dehydration can also be reduced by providing a spring whose spring constant changes depending on the amount of displacement in the front-rear direction of the water tank, or a spring disposed with a clearance from the water tank. As described above, it is possible to improve the dewatering performance by high-speed rotation dewatering and the reliability by reducing the wear of the bellows during high-speed rotation dewatering.

  Examples 1 to 6 of the present invention will be described below with reference to the drawings.

  The configuration of the first embodiment of the present invention will be described below with reference to FIGS.

  FIG. 1 is a cross-sectional view of a drum type washing machine. In FIG. 1, 1 is an outer frame of the washing machine, 2 is a top plate attached to the upper portion of the outer frame 1, 3 is a water tank that encloses the drum 4 and stores washing water, and 5 is a water passage provided on the outer periphery of the drum 4. A hole 6 is provided on the inner periphery of the drum 4 and lifts the laundry when the drum 4 rotates, 7 is a base for mounting a motor 10 for driving the drum 4, and the motor 10 includes a stator 8 and a rotor 9. , 11 is a rotating shaft that transmits the rotation of the rotor 9 to the drum 4, 12 is a weight that reduces vibration of the water tank 3, 13 is a bellows that elastically connects the water tank 3 and the inlet of the outer frame 1, and 14 is the outer frame 1. An inlet lid for preventing water leakage from the inlet and jumping out of the laundry, 15 is an operation control unit for operating and controlling various settings of the drum type washing machine, and 16 is an anti-vibration for hanging the water tank 3 on the outer frame 1 A spring 17 is used to attenuate the vibration of the water tank 3. Vibration isolation damper 20 is a liquid balancer to reduce unbalance generated by such offset of the laundry during dewatering. The laundry is put into the drum 4 through the drum opening 21 through the bellows 13 from the slot of the outer frame 1 by opening the slot 14. In order to perform washing and dehydration, the water absorption valve 18 is opened to supply washing water during washing, and the drainage valve 19 is opened to drain the washing water during dehydration, and the drum 4 is rotated at high speed to rotate the drum 4 at high speed. Perform centrifugal dehydration to remove moisture. FIG. 2 is a graph showing the relationship between the horizontal axis of the dehydration rotation speed and the vertical axis of the amount of movement of the water tank 3 to the front side. It can be seen that the water tank gradually moves to the front side as the rotation speed of the drum 4 increases. . As described above, the cause of the movement of the water tank 3 during the high-speed rotation dehydration is considered as follows. The centrifugal force generated by the rotation of the drum 4 causes the air in the drum 4 to move to the outer peripheral side, causing a phenomenon in which the pressure on the outer peripheral side is high and the pressure on the inner peripheral side is low inside the water tank 3. At this time, the space formed by the insertion opening lid 14, the bellows 13, and the drum opening 21 provided in the outer frame 1 is also connected to the inner peripheral side of the water tank 3 (drum 4), and thus has a negative pressure. Therefore, a force for reducing the space is generated. When the space becomes smaller, since the charging port lid 14 is fixed, the water tank 3 that is most movable moves forward while compressing and deforming the bellows 13 so as to be sucked by the charging port lid 14. In this phenomenon, the pressure difference between the inner and outer circumferences increases as the drum 4 rotates at a higher speed. Therefore, the amount of movement of the water tank 3 increases as the rotational speed increases. Thus, when the amount by which the water tank 3 moves forward increases, the gap provided for preventing the wear of the bellows 13 decreases, the bellows 13 come into contact with each other, or the water tank 3 and the bellows 13 come into contact with each other. The bellows 13 will be damaged.

  Here, the following can be considered as a method of reducing the amount of movement of the water tank 3.

(1) Block the flow path connecting the outer peripheral side of the water tank 3 and the outside air (2) Take the outside air into the inner peripheral side of the water tank 3 (drum 4) and reduce the negative pressure (3) The outer periphery of the high pressure water tank 3 (4) A fan is installed in the intake air passage (2) and the circulation air passage (3) to forcibly send air. (5) A spring is provided in the front-rear direction of the water tank 3 and the displacement is suppressed by the spring force. Therefore, the first embodiment of the present invention is the outer peripheral side of the water tank 3 with respect to the method (1) for reducing the amount of movement of the water tank 3 described above. It is the Example using the flow path of the waste_water | drain system connected to the outside air. A general washing machine is provided with a drain valve 19 in the drain passage, and by opening and closing the drain valve 19, water is stored in the water tub 3 during washing, and water discharged from the laundry or laundry stored in the water tub 3 during dehydration. Is draining. Here, the dehydration speed and the amount of movement of the water tank 3 when the drain valve 19 is opened and closed will be described. The dotted line in FIG. 2 represents the relationship between the dehydration speed and the movement of the water tank 3 when the drain valve 19 is opened, and the solid line represents the relationship when the drain valve 19 is closed. ing. As shown in the figure, when the drain valve 19 is opened, the air on the outer peripheral side of the water tank 3 having a high pressure passes through the drain valve 19 and escapes to the outside air from the drain flow path, and the air on the inner peripheral side of the water tank 3 is more on the outer peripheral side. Since the air on the inner peripheral side decreases and the negative pressure increases, the amount of movement of the water tank 3 increases compared to when the drain valve 19 is closed. However, as described above, since drainage must be performed during dehydration, it is impossible to close the drain valve 19 during the entire dehydration process. Therefore, for example, as shown in FIGS. 3 and 4, the drain valve 19 is closed and the dewatering performance is improved only when the rotational speed is equal to or higher than the set rotational speed (the rotational speed N1 of the displacement x1 at which the wear of the bellows 13 does not occur as usual). In order to improve, the dehydration speed is increased to N2 (where the displacement is x1). However, if the rotation is continued as it is, water accumulates in the water tank 3, and when the time T1 elapses, the drain valve 19 is opened and the dehydration speed is reduced to N1. Here, the waiting drainage operation is performed for the drainage time T2, and after that, when the dewatering set time T0 has not elapsed, the drainage valve 19 is closed again, and the dewatering speed is increased to N2. This operation is repeated, and when the set time T0 has elapsed, the dehydration is finished. By performing the operation as shown in the flowchart of FIG. 4, as shown in FIG. 3, it is possible to maintain the displacement without causing the conventional wear and maintain the reliability, and also to improve the dewatering performance. Here, since the rotation time T1 at the dehydration rotation speed N2 varies depending on the product, it is necessary to examine in advance before commercialization with the maximum washing capacity. The same applies to the drainage time T2.

  Next, regarding the method (2) for reducing the amount of movement of the aquarium 3 described above (taking outside air into the inner peripheral side of the aquarium 3 to reduce the negative pressure), the configuration of one embodiment of the present invention will be described with reference to FIGS. Will be described. The overall structure of the drum type washing machine is substantially the same as that shown in FIG. 1, but will be described with reference to FIG. 5 in which the weight 12 for reducing vibration of the water tank 3 is omitted. In this embodiment, as shown in FIG. 5, an outside air inlet 25 is provided in the vicinity of the connection portion of the water tank 3 with the bellows 13 in order to introduce the outside air to the inner peripheral side of the water tank 3. As shown in FIG. 5, by providing an outside air introduction port 25 that communicates with the space formed by the charging port lid 14, the bellows 13, and the drum opening 21, the inside of the water tank 3, that is, the inside of the drum 4. The outside air can be introduced into the air, and the negative pressure is relieved by supplementing the air to the inner peripheral side of the drum 4 that has been moved to the outer peripheral side by centrifugal force and has become negative pressure, and the moving amount of the water tank 3 is reduced. Can do. And the pressure distribution in the water tank 3 at the time of dehydration is such that the pressure increases as it goes to the outer periphery of the water tank 3 and becomes negative as it approaches the center. Even if the space formed by the charging port lid 14, the bellows 13 and the drum opening 21 is communicated with the outside air, the drum opening 21 is located at the center of the drum 4, so that a high reduction effect can be obtained. Then, as shown in FIG. 11, by setting the rotary shaft 28 as the hollow 29 to serve as the outside air introduction port, the outside air communicates with the center of the drum 4 having the most negative pressure, and a high reduction effect is obtained. be able to. However, if the outside air inlet 25 is in an open state, the inside of the water tank 3 may become a positive pressure when the water tank 3 moves to the front side due to vibration during drying or the like. Leakage occurs in the outer frame 1 in the frame 1 or moisture is released to the room where the washing machine is placed. Therefore, as shown in FIG. 6, a check valve 26 that performs only intake is provided at the outside air introduction port 25, and a structure that does not exhaust air is provided, so that moisture is not discharged from the water tank 3 into the water tank 3. It is possible to perform only intake.

  Normally, if the negative pressure part is communicated with the outside air, only the intake is performed without exhausting, but if the negative pressure is small, the suction input is reduced and the effect of reducing the amount of movement is reduced. When the outside air inlet 25 is provided only in a small part, or when the effect of reducing the amount of movement of the water tank 3 is required, an intake fan 27 is provided in the outside air inlet 25 as shown in FIG. By rotating and sucking more air into the water tank 3, a higher effect can be obtained. Then, it may be rotated from the initial stage of the dehydration process as shown in FIG. 8, and as shown in FIGS. 9 and 10, the set rotational speed (the rotational speed N1 of the displacement x1 at which the wear of the bellows 13 as usual does not occur). Only in the above case, even if the intake fan 27 is rotated, the conventional displacement is maintained and the reliability is maintained and the dewatering performance can be improved.

  Next, the configuration of an embodiment of the present invention will be described below with respect to the above-described method for reducing the amount of movement of the water tank 3 (3) (connecting the periphery of the high pressure tank 3 and the inner periphery of the low pressure tank 3). This will be described with reference to FIGS. The overall configuration of the drum type washing machine is substantially the same as that shown in FIG. In this embodiment, as shown in FIG. 12, circulating air that connects the vicinity of the connection portion between the outer peripheral side of the high-pressure water tank 3 and the bellows 13 of the water tank 3 that forms the same space as the low-pressure drum opening 21. By providing the path 30, the high pressure portion in the water tank 3 is connected to the low portion, so that the pressure difference in the water tank 3 can be relaxed, and the amount of movement of the water tank 3 can be reduced. A higher effect can be obtained by providing the circulation fan 31 in the circulation air passage 30 and rotating the circulation fan 31 to circulate more air. Then, as shown in FIG. 13, it may be rotated from the initial stage of the dehydration process. As shown in FIGS. 14 and 15, the set number of revolutions (the number of revolutions N1 of the displacement x1 at which the wear of the bellows 13 as usual does not occur) Only in the above case, even if the circulation fan 31 is rotated, the displacement that does not cause the conventional wear is maintained, the reliability is maintained, and the improvement of the dewatering performance can be achieved.

  Next, in the above-described method for reducing the amount of movement of the water tank 3 (3) (connecting the periphery of the outer periphery of the high-pressure tank 3 and the inner periphery of the low-pressure water tank 3) The configuration of one embodiment of the present invention will be described with reference to FIGS. The overall configuration of the drum type washing machine is substantially the same as that shown in FIG. In the present embodiment, as shown in FIG. 16, the drying duct 22 that connects the vicinity of the connecting portion between the rear surface of the water tank 3 and the bellows 13 of the water tank 3 as a drying component, and the air in the duct 22 are circulated. A blower fan 23 and a heater 24 for raising the temperature of the circulating air for drying are provided. The drying duct 22 of this embodiment connects the vicinity of the outer peripheral side of the rear surface of the water tank 3 having a relatively high pressure and the connection portion between the bellows 13 of the water tank 3 that forms the same space as the drum opening 21 having a low pressure. Therefore, the pressure difference in the water tank 3 can be relaxed, and the movement of the water tank 3 can be reduced. And by rotating the ventilation fan 23, more air can circulate through the duct 22, and a higher effect can be acquired. At this time, it is not necessary to turn on the heater 24 because the circulating air does not need to be warm. However, since the dehydrating performance is also improved by making the circulating air warm, the heater 24 may be turned on and warmed. Then, as shown in FIG. 17, the rotation may be performed from the initial stage of the dehydration process. As shown in FIG. 18 and FIG. Only in the above case, even if the blower fan 23 is rotated, the conventional displacement is maintained so that the wear does not occur, the reliability is maintained, and the dewatering performance can be improved.

  Next, with regard to the method (5) for reducing the amount of movement of the aquarium 3 described above (a spring is provided in the front-rear direction of the aquarium 3 and the displacement is suppressed by the spring force), the configuration of one embodiment of the present invention will be described below with reference to FIGS. Will be described. The overall configuration of the drum type washing machine is substantially the same as that shown in FIG. In this embodiment, as shown in FIG. 20, a front-rear direction spring 32 is arranged between the water tank 3 and the outer frame 1, and when the spring 32 reaches a certain displacement or more as shown in FIG. By using an increasing non-linear spring or a multistage spring, the water tank 3 and the outer frame 1 are connected with a soft spring constant in a normal use state, and the vibration of the water tank 3 is not easily transmitted to the outer frame 1. Is suppressed. However, during high-speed rotation dehydration of dehydration, the vibration transmitted to the outer frame 1 increases, but in order to reduce the amount of movement of the water tank 3 and reduce wear of the bellows 13, by increasing the spring constant, Low vibration and high reliability during high speed rotation dehydration can be achieved.

  Next, with regard to the method (5) for reducing the amount of movement of the aquarium 3 described above (a spring is provided in the front-rear direction of the aquarium 3 and the displacement is suppressed by the spring force), the configuration of one embodiment of the present invention is described below with reference to FIGS. Will be described. The overall configuration of the drum type washing machine is substantially the same as that shown in FIG. In this embodiment, as shown in FIG. 22, the front-rear direction spring 33 provided on the outer frame 1 has a gap x between the water tanks 3. The structure is such that the longitudinal spring 33 acts. Therefore, in the normal use state, the front-rear direction spring 33 and the water tank 3 are not in contact with each other, so that the vibration of the water tank 3 is not transmitted to the outer frame 1. However, when the movement amount of the water tank 3 becomes large and exceeds the gap x at the time of high-speed rotation dehydration, the front-rear direction spring 33 acts and the vibration transmitted to the outer frame 1 increases, but the displacement is reduced in order to reduce the wear of the bellows 13. By suppressing, it is possible to achieve low vibration during normal operation and high reliability during high-speed rotation.

  Moreover, the reduction effect of the higher water tank 3 movement amount can be acquired by combining the technique of Example 1 to Example 6. FIG.

  As described above, according to each of the above-described embodiments, the air escaping from the outer peripheral side of the water tank to the outside air is suppressed, the outside air is taken into the drum inner peripheral side, or the high pressure water tank outer peripheral side and the low pressure water tank inside The amount of movement of the water tank during high-speed rotation dehydration can be reduced by providing a circulation air passage that connects the peripheral sides, or forcibly sending air to the inner peripheral side where the pressure is low by rotating the drying fan. Moreover, the movement amount of the water tank at the time of high-speed rotation dehydration can also be reduced by providing a spring whose spring constant changes depending on the amount of displacement in the front-rear direction of the water tank, or a spring disposed with a clearance from the water tank. As described above, it is possible to improve the dewatering performance by high-speed rotation dewatering and the reliability by reducing the wear of the bellows during high-speed rotation dewatering.

1 is a side sectional view of a drum type washing machine that is Embodiment 1 of the present invention. The schematic diagram which shows the relationship between the spin-drying | dehydration rotation speed at the time of drain valve opening and closing of Example 1 of this invention, and a water tank movement amount. The schematic diagram which shows the relationship between the spin-drying | dehydration rotation speed at the time of controlling the drain valve of Example 1 of this invention, and a tank movement amount. The flowchart which shows one procedure of Example 1 of this invention. Side surface sectional drawing of the drum type washing machine which is Example 2 of this invention. Sectional drawing which shows the non-return valve provided in the external air inlet of Example 2 of this invention. Sectional drawing which shows the intake fan provided in the external air inlet of Example 2 of this invention. The schematic diagram which shows the relationship between the spin-drying | dehydration rotation speed at the time of rotation / stop of the intake fan of Example 2 of this invention, and the amount of water tank movement. The schematic diagram which shows the relationship between the spin-drying | dehydration rotation speed at the time of controlling the intake fan of Example 2 of this invention, and a water tank movement amount. The flowchart which shows one procedure of Example 2 of this invention. Side surface sectional drawing of the drum type washing machine which is Example 2 of this invention. Side surface sectional drawing of the drum type washing machine which is Example 3 of this invention. The schematic diagram which shows the relationship between the spin-drying | dehydration rotation speed at the time of rotation of the circulation fan of Example 3 of this invention, and a water tank movement amount. The schematic diagram which shows the relationship between the spin-drying | dehydration rotation speed at the time of controlling the circulation fan of Example 3 of this invention, and a water tank movement amount. The flowchart which shows one procedure of Example 3 of this invention. Side surface sectional drawing of the drum type washing machine which is Example 4 of this invention. The schematic diagram which shows the relationship between the spin-drying | dehydration rotation speed at the time of rotation and stop of the ventilation fan of Example 4 of this invention, and a water tank movement amount. The schematic diagram which shows the relationship between the spin-drying | dehydration rotation speed at the time of controlling the ventilation fan for Example 4 of this invention, and a water tank movement amount. The flowchart which shows one procedure of Example 4 of this invention. Side surface sectional drawing of the drum-type washing machine which is Example 5 of this invention. The schematic diagram which shows the relationship between the displacement of the front-rear spring of Example 5 of this invention, and a spring force. Side surface sectional drawing of the drum type washing machine which is Example 6 of this invention. The schematic diagram which shows the relationship between the displacement of the front-rear spring of Example 6 of this invention, and a spring force.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer frame 2 Top plate 3 Water tank 4 Drum 5 Water flow hole 6 Baffle 7 Base 8 Stator 9 Rotor 10 Motor 11 Rotating shaft 12 Weight 13 Bellows 14 Loading port cover 15 Operation control part 16 Anti-vibration spring 17 Anti-vibration damper 18 Water absorption valve 19 Drain valve 20 Liquid balancer 21 Drum opening 22 Drying duct 23 Drying blower fan 24 Drying heater 25 Outside air inlet 26 Check valve 27 Intake fan 28 Hollow rotary shaft 29 Hollow rotary shaft hollow 30 Circulating air passage 31 Circulation Fans 32 and 33 Front and rear springs

Claims (11)

  A water tub disposed in the outer frame of the washing machine, a drum that is rotatably provided in the water tub and that accommodates laundry, a motor that rotationally drives the drum, and the outer frame of the washing machine and the water tub An anti-vibration spring that receives the load of the water tank, and an anti-vibration damper that is provided between the water tank and the outer frame to suppress vibration of the water tank; In a drum type washing machine comprising a bellows connecting the charging port and the water tank, a drain valve provided in a drain channel, and a dehydration step performed by rotating the drum, the drain valve is closed during the dehydration. A drum-type washing machine characterized by that. In claim 1,
The drum type washing machine, wherein the drain valve is closed when the drum has a predetermined number of revolutions or more.   A water tub disposed in the outer frame of the washing machine, a drum that is rotatably provided in the water tub and that accommodates laundry, a motor that rotationally drives the drum, and the outer frame of the washing machine and the water tub A vibration-proof spring that is mounted on the tank and receives the load of the water tank, a vibration-proof damper that is mounted between the water tank and the outer frame of the washing machine and suppresses vibration of the water tank, and clothes are put on the front surface of the outer frame of the washing machine A drum type washing machine provided with an input port and a bellows connecting the input port and the water tub, wherein an outside air introduction port communicating with the opening of the drum is provided.   4. The drum type washing machine according to claim 3, wherein a valve capable of intake only is provided at the outside air introduction port.   4. A drum type washing machine according to claim 3, wherein a fan for sending air into the water tank is provided at the outside air inlet.   6. The drum type washing machine according to claim 3, wherein an outside air introduction port communicating with the inside of the drum is provided with a shaft of the drum as a hollow shaft.   A water tub disposed in the outer frame of the washing machine, a drum that is rotatably provided in the water tub and that accommodates laundry, a motor that rotationally drives the drum, and the outer frame of the washing machine and the water tub A vibration-proof spring that is mounted on the tank and receives the load of the water tank, a vibration-proof damper that is mounted between the water tank and the outer frame of the washing machine and suppresses vibration of the water tank, and clothes are put on the front surface of the outer frame of the washing machine A drum type washing machine provided with an inlet and a bellows connecting the inlet and the water tank, wherein a circulating air passage connecting the outer peripheral side and the inner peripheral side of the water tank is provided.   8. The drum type washing machine according to claim 7, wherein a circulation fan is provided in the circulation air passage connecting the outer peripheral side and the inner peripheral side of the water tank.   A water tub disposed in the outer frame of the washing machine, a drum that is rotatably provided in the water tub and that accommodates laundry, a motor that rotationally drives the drum, and the outer frame of the washing machine and the water tub A vibration-proof spring that is mounted on the tank and receives the load of the water tank, a vibration-proof damper that is mounted between the water tank and the outer frame of the washing machine and suppresses vibration of the water tank, and clothes are put on the front surface of the outer frame of the washing machine An inlet, a bellows connecting the inlet and the water tank, a duct through which circulating air flows during drying, a blower fan that generates circulating air, a heater for raising the temperature of the circulating air, and a drum that rotates. A drum-type washing machine comprising: a dehydrating step, wherein the blower fan is rotated while electricity is not supplied to the heater during the dehydration.   A water tub disposed in the outer frame of the washing machine, a drum that is rotatably provided in the water tub and that accommodates laundry, a motor that rotationally drives the drum, and the outer frame of the washing machine and the water tub A vibration-proof spring that is mounted on the tank and receives the load of the water tank, a vibration-proof damper that is mounted between the water tank and the outer frame of the washing machine and suppresses vibration of the water tank, and clothes are put on the front surface of the outer frame of the washing machine A drum-type washing machine having a charging port and a bellows connecting the charging port and the water tub, comprising a spring that supports the front and rear of the water tub, wherein at least one of the spring constants varies depending on the amount of displacement. Drum-type washing machine.   A water tub disposed in the outer frame of the washing machine, a drum that is rotatably provided in the water tub and that accommodates laundry, a motor that rotationally drives the drum, and the outer frame of the washing machine and the water tub A vibration-proof spring that is mounted on the tank and receives the load of the water tank, a vibration-proof damper that is mounted between the water tank and the outer frame of the washing machine and suppresses vibration of the water tank, and clothes are put on the front surface of the outer frame of the washing machine A drum-type washing machine comprising a charging port and a bellows connecting the charging port and the water tub, wherein the drum type has at least one spring arranged with a gap between the water tub and before and after the water tub. Washing machine.

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