JP2009233216A - Drum type washing/drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide: a fluid balancer capable of preventing the deterioration of a fluid balance performance; and a drum type washing/drying machine having the fluid balancer. <P>SOLUTION: Conventionally, materials used are conformed to a material for a high-temperature side of warm air, so that an upper component and a base component constituting the fluid balancer are manufactured conformed to one having a high glass fiber content rate and are spin-welded, however, the high glass fiber content rate deteriorates the welding property. For lowering the glass content rate of the upper component, the glass fiber content rate of the base component coming into direct contact with a high-temperature rotating drum is raised, while the glass fiber content of the low temperature side upper component is reduced compared with the base component. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a drum-type washing / drying machine, which is attached to the front surface of a rotating drum and produces a fluid balancer that corrects laundry imbalance by thermal welding. The present invention relates to a drum-type washer / dryer that is improved.

  For example, Japanese Patent No. 3183125 (Patent Document 1) describes a fully automatic washing machine in which glass fibers are contained in a fluid balancer.

  Japanese Patent Application Laid-Open No. 2005-95562 (Patent Document 2) discloses a fluid balancer attached to the front surface of a rotating drum.

Japanese Patent No. 3183125 JP-A-2005-95562

  In the drum type washing and drying machine, by rotating the rotating drum, the laundry in the rotating drum is floated, hot air is blown to efficiently evaporate the moisture, and the water-cooled dehumidifier dehumidifies and dries.

  At this time, the higher the temperature of the hot air, the better the drying efficiency. However, if the temperature is too high, the laundry is damaged, so the temperature is set to about 70 to 110 ° C. For this reason, in order to increase the heat distortion temperature of the upper part and the bottom part constituting the fluid balancer, the content of polypropylene glass fiber is increased to improve heat resistance. The fluid balancer is sealed by joining both parts by heat welding so that the fluid sealed in the upper part and the lower part does not leak. For example, there is spin welding as a thermal welding method. In spin welding, the bottom part is fixed, the top part is rotated, and the bottom part is brought into pressure contact to generate frictional heat and melt the resin to join the two parts. For this reason, the melted part of the upper part stays slightly on the inner and outer peripheral sides centering on the melted part, and when the glass fiber content increases, the glass fiber does not melt, so the resin is entrained and spreads on both sides in the form of cotton. The welded part between the top and bottom parts of the fluid balancer forms a fluid passage so that the resin is less likely to stay, but there are ribs on the outer peripheral side of the bottom part, so there is a cotton-like structure at the ribs. If there is much resin, it will stay and block the fluid passage. For this reason, there is a problem that the fluid is difficult to flow and the performance of the fluid balance is lowered. Then, an object of this invention is to provide the fluid balancer which can prevent the fall of the performance of fluid balance, and the drum type washing-drying machine provided with this fluid balancer.

  Therefore, in order to solve the problem, the present invention provides a rotating drum having an opening formed of a metal material, a fluid balancer provided in an outer peripheral portion of the opening of the rotating drum and enclosing a fluid, and the rotating drum. And a means for blowing warm air in the drum-type washing / drying machine in which the bottom part and the upper part are joined by heat welding. The glass fiber content of the upper part is less than that of the bottom part. It is characterized by that.

  In the upper part and the bottom part that make up the fluid balancer, since the materials used are conventionally used on the high temperature side of the hot air, both parts are manufactured according to the one with the higher glass fiber content, and spin welding is performed. However, if the glass fiber content is high, the weldability deteriorates, so the glass content of the upper part is reduced. Therefore, the glass fiber content of the bottom part that is in direct contact with the high-temperature rotating drum is increased. The glass fiber content of the lower part of the upper part was lower than that of the bottom part. This reduces the amount of friction energy absorbed by the glass fiber, shortens the spin welding time by using it for the melting energy of polypropylene, and reduces the amount of glass fiber mixed with the resin to become cottony. Prevents the fluid balancer from degrading by staying in multiple ribs in the circumferential direction to prevent the fluid passage area from becoming narrower and difficult to flow and the fluid balance performance from degrading. It was.

  According to the present invention, since the glass fiber content of the upper part is small, the amount of glass fiber of the upper part that is rotated during spin welding is small, so that the friction energy is often used for the melting energy of polypropylene, so the spin welding time The time and amount of the glass fiber that melts due to centrifugal force and takes the resin to move to the outer peripheral side is reduced, so the amount of resin that blocks the fluid passage is reduced, and the resin on the cotton that stays in the ribs is reduced. Therefore, the fluid passage can be prevented from being blocked, and the flow of fluid can be secured, so that the performance of the fluid balancer can be prevented from being deteriorated.

  Hereinafter, examples according to embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a drum type washing and drying machine according to an embodiment of the present invention. An outer frame 2 configured by combining a steel plate and a resin molded product is placed on the base 1. A door 3 for taking in and out the laundry is provided in front of the outer frame 2, and an opening / closing operation is performed by a push button switch 4. The door 3 is constituted by a resin molded part whose outside is a design part and a door part made of heat-resistant glass on the inside. A drain hose fixing hole 5 is provided on the side surface of the outer frame 2. A plurality of handles 6 are provided for carrying and moving the main body. A detergent tray 7 and a drying filter 8 are attached to the top and bottom of the outer frame 2 on the left and right. An operation unit 9 and a display unit 10 are provided between them. Further, a drain hose 11 is drawn out from the side surface of the base 1, and legs 12 into which rubber is inserted are arranged at the four corners at the bottom.

  FIG. 2 relates to an embodiment of the present invention, and shows a longitudinal sectional view of a drum type washing machine. An outer tub 20 is provided inside the outer frame 2. The outer tub 20 is supported by a plurality of suspensions 21 provided at the lower portion thereof, and the upper portion thereof is supported by two tension springs 22 and 23 disposed in the front-rear direction. The suspension 21 supports the entire weight of the outer tub 20 and has a strong structure. Further, a damping mechanism or the like is provided for absorbing the vertical vibration of the outer tub 20 generated during the dehydration operation and preventing abnormal vibration due to resonance of the outer tub 20 at the start of dehydration. Further, the tension springs 22 and 23 supported from the upper part of the outer tub 20 are provided to prevent the outer tub 20 from collapsing in the front-rear direction and to reduce vibrations before and after, up and down, left and right during dehydration. . When it is easy to wash, it is connected to the water supply electromagnetic valve 25 from the water supply hose 24 connected to the tap of the water supply, and it is necessary to make it easy to wash through the water supply hose 26 via the detergent charging case 27 by the operation of the water supply electromagnetic valve 25. Water is supplied. The supplied water is stored as washing water at the bottom of the outer tub 20 and as rinsing water at the time of rinsing. In the detergent charging case 27, a detergent necessary for washing is charged, and a softening finish for improving the finish is charged when rinsing. At the time of washing, the water supplied from the water injection hose 26 is introduced from the upper part of the outer tub 20 through the flexible hose 28 while dissolving the detergent in the detergent introduction case 27.

  A rotating drum 29 inside the outer tub 20 accommodates the laundry 30 that is put in by opening the door 3. A fluid balancer 31 is provided on the outer periphery of the opening of the rotary drum 29 to reduce vibration caused by the unbalancer due to the laundry 30 during dehydration. Since the fluid balancer 31 rotates at a high speed integrally with the rotary drum 29, in order to ensure the strength, generally, polypropylene is blended with 5 to 20% of glass fiber and the structure is designed. In addition, as the liquid filled therein, a fluid in which sodium chloride, potassium chloride, calcium chloride or the like is used as an aqueous solution is used as a material that has a high specific gravity and does not decay. These fluids are filled about 30 to 50% of the volume of the passage, and a saturated aqueous solution is used.

  Inside the rotating drum 29, a plurality of dewatering holes 32 for dewatering moisture contained in the laundry 30 at high speed during dehydration are provided on the entire circumference. A plurality of lifters 33 are provided inside the rotary drum 29 so that the laundry 30 can be lifted up during washing. The rotating drum 29 is directly connected to a drum driving motor 36 via a main shaft 35 connected to a rotating drum metal flange 34. The drum drive motor 36 is attached to a metal flange 37 fixed to the outer tub 20. In this embodiment, the drum drive motor 36 is a magnet-embedded inner rotor and the stator uses a DC brushless motor having concentrated windings.

  A rubber bellows 38 made of an elastic body is attached to the opening of the outer tub 20. The door 3 includes a transparent resin molded part 39 and a heat resistant glass part. The bellows 38 is provided so as to be in direct contact with the seal portion outer peripheral surface 40a of the heat-resistant glass component 40 among the transparent resin molded component 39 and the heat-resistant glass component 40 constituting the door 3. It plays the role of maintaining watertightness with the door 3. This prevents water leakage during washing, rinsing and dehydration. Since the door 3 is sandwiched and fixed between the heat-resistant glass component 40 and the transparent resin molded component 39, a collar portion 40b is provided on the entire circumference, and the inner end surface 40c thereof is arranged so as not to wrap around the fluid balancer 31 in the axial direction. ing. Thereby, the space for storing the laundry 30 can be secured as much as possible. Water that has become unnecessary after being rinsed easily or water that has been dehydrated from the laundry 30 during dehydration is drained from the drainage hose 11 by opening the drain valve 41.

  In drying, since the air blown by the blower fan 42 passes through the inside and the outer periphery of the rotary drum 29 containing the laundry 30, it contains a waste thread and must be passed through the drying filter 8. For this reason, although the path is not shown, the air is blown to the heater 43 via the drying filter 8, and the heated hot air is blown into the rotary drum 29 from the opening 44 provided in the upper part of the outer tub. . The warm air passes through the laundry 30 and is dehumidified by the dehumidifying device 45 through the ventilation port 46 of the dehumidifying device 45 provided in the bottom of the outer tub 20 from the rear part of the rotating drum 29, and is repeatedly circulated by the blower fan 42. 30 is dried.

  FIG. 3 relates to the embodiment of the present invention, and is a block diagram showing an operation process of the drum type washing machine. In this operation process, the dirt attached to the laundry 30 is removed, the detergent component by rinsing is rinsed, the water contained in the laundry 30 is dehydrated by centrifugal force due to the high-speed rotation of the rotary drum 29, A general automatic washing course that automatically performs a series of steps such as draining the water is shown in this block diagram. Each step will be described below based on the block diagram. Water supply 50 is performed by operating the water supply electromagnetic valve 25. In the washing step 51, when water necessary for washing is supplied into the outer tub 20, the drum driving motor 36 rotates and the rotating drum 29 rotates. The rotational speed of the rotating drum 29 at this time is 40 to 50 rotations per minute, and the laundry 30 is lifted up by the lifter 33 in the rotating drum 29 by performing a right rotation and a left rotation for several minutes with a pause. While washing by tapping. When the washing process 51 is completed, the dirt attached to the laundry 30 is removed by washing, and the process proceeds to a draining process 52 for discharging dirty washing water to the outside of the washing machine. After the drainage is completed, the process proceeds to a dehydration step 53 for dehydrating the detergent contained in the laundry 30. In the dewatering step 53, the rotating drum 29 is rotated at a high speed, and the laundry 30 is dewatered from the plurality of dewatering holes 32 provided on the inner wall of the rotating drum 29 by centrifugal force. The number of rotations at this time is 800 to 1500 rotations per minute. When the dehydration process 53 is completed, the detergent contained in the laundry 30 is rinsed and the process proceeds to the rinsing process 54. Before entering the rinsing step 54, fresh water necessary for supplying fresh water is supplied into the outer tub 20 in the water supply step 50 for supplying fresh water in the same manner as the washing step 51. In this embodiment, 25 to 30 liters of fresh water necessary for rinsing is supplied as in the case of washing. When a specified amount of fresh water is supplied, the process automatically proceeds to the rinsing process 54, and the detergent contained in the laundry 30 while the rotating drum 29 rotates at a low speed (around 45 rotations per minute) as in the washing process. Remove minutes. In this embodiment, the rinsing is performed twice, but the number of times of the rinsing step 54 is two to three. After the rinsing step 54 is completed, drainage is performed and the final dehydration step 55 is entered to sufficiently dehydrate the moisture contained in the laundry 30. The dewatering time of the final dewatering step 55 is generally 5 minutes or longer, and the rotating drum 29 is rotated at a high speed to remove the moisture of the laundry 30 by centrifugal force. The dehydration rate at this time is 60 to 65%. In the drum type washing and drying machine, warm air is circulated in the tank by the heater 43 as a heat source, and the process automatically proceeds from washing to drying. In this case, after the final dehydration process 55 is completed, the process automatically proceeds to the drying process 56. In the drying process 56, after the moisture of the laundry 30 is sufficiently removed, the heater 43 blows hot air of 70 to 110 ° C. directly into the rotating drum 29 and rotates while blowing it on the laundry 30 stored therein. The drum 29 is reversed or rotated in one direction at 40 to 55 revolutions per minute to remove moisture from the laundry 30 and dry it. For this reason, the rotating drum 29 made of stainless steel is heated by warm air, and the fluid balancer 31 disposed outside the entrance of the rotating drum 29 is also heated. As a result, the bottom part 81 that is in direct contact with the rotating drum 29 needs to increase heat resistance, and uses polypropylene with a glass fiber content of 20%. On the other hand, the upper part 80 that does not receive heat directly from the rotating drum 29 and does not require much heat resistance uses polypropylene having a glass fiber content of 10%.

  In order to shorten the drying time, it is necessary to increase the number of revolutions in the final dehydration step 55 to increase the dehydration rate, and the maximum is 1500 revolutions per minute. Thereby, although it depends on the diameter of the rotating drum 29, the dehydration rate is about 70%. In the drying process, there is a cooling process 57 after the completion of the process. Cooling is performed by circulating cooling air in the rotary drum 29. When the temperature is lowered to a predetermined temperature, the push button switch 4 is pressed to release the lock, and the door 3 is opened. The laundry 30 can be taken out by opening. Similarly, when it is desired to stop the drying in the middle of drying, the temperature in the rotating drum is about 80 to 100 ° C. Therefore, it is opened by the cooling step 57 after the temperature is lowered to 60 ° C. or less. Yes. The temperature in the rotating drum is determined by detecting the temperature of the air being blown by a temperature sensor provided in the blower duct.

  FIG. 4 relates to an embodiment of the present invention, and shows a circuit for driving a drum type washing machine. The AC 100V commercial power supply 60 enters the filter circuit 64 through the outlet 63 through the fuse 63 arranged in parallel with the power switch 62. From the back of the filter circuit 64, power is directly supplied to various electrical components and the rectifier circuit 65. The rectifier circuit 65 is connected to a switching power supply 66 and an inverter circuit 67 for supplying a low-voltage DC power supply. In addition, a voltage detection circuit 68 and a fuse 69 are connected between them. The inverter drive circuit 70 controls the inverter drive circuit 67 by the signal of the rotational position sensor 71 attached to the drum drive motor 36 to rotate the drum drive motor 36. The entire drum type washing machine is controlled by the microcomputer 72. Electric components directly driven by the commercial power source 60 include a water supply electromagnetic valve 25 and a drain valve 41, which are performed by controlling the current flowing through the relay winding 74 by the microcomputer 72 through the relay contacts 73 connected in series to each other. . Further, the blower fan 43 used in the drying process and the circulation pump motor 76 used at the time of washing and rinsing use the same inverter circuit 77 with the changeover switch 78 being used. For this reason, a circuit can be shared and cost can be reduced. The heater 43 is connected in parallel with a heater having the same capacity, and the power source is taken from the front of the filter circuit 64. This is because the heater 43 is a pure resistor, so that it is not necessary to pass through the filter circuit 64, and the heater 43 has a large current, so that it is used before the filter circuit 64 to reduce the inductance capacity.

  FIG. 5 shows a front view of the fluid balancer 31 according to the embodiment of the present invention. FIG. 6 is a longitudinal sectional view of the fluid balancer 31 according to the embodiment of the present invention. The fluid balancer 31 joins two parts, an upper part 80 and a bottom part 81, by spin welding, and fills it with a liquid (not shown). As the liquid, a fluid in which sodium chloride, potassium chloride and calcium chloride are made into an aqueous solution is used as a material which has a high specific gravity and does not rot. These fluids are filled with about 30 to 50% of the space volume and use a solution that becomes a saturated solution at room temperature. Moreover, the upper part 80 and the bottom part 81 use polypropylene as a base material, and glass fibers are mixed in order to improve the heat distortion temperature. In the embodiment of the present invention, the glass fiber content in the bottom part 81 is 20 wt%. The upper part 80 is made of glass fiber with a content of about 10 wt%. The upper part 80 includes a glass-containing material by reducing the number of surfaces parallel to the circumferential direction in order to reduce the stress of the fluid due to the centrifugal force as much as possible, and providing the partition wall 82 of the circumferential fluid passage 83 in the bottom part 81. Since it is provided on the bottom part 81 side where the rate is high, the mechanical strength against the centrifugal force can be ensured. Since the upper part 80 has a slanted outer periphery, the part parallel to the outer periphery receives 100% centrifugal force, but the slanted part reduces the centrifugal force by the angle and shortens the length of the parallel part accordingly. It is also possible to reduce the stress applied to. In the upper part 80, the partition wall 82 in the bottom part 81 is only the part of the partition wall 82a. However, since the length is about ½ compared to the partition wall 82, the stress due to centrifugal force is also proportionally reduced, so there is no problem. However, since the strength can be increased by providing the ribs 86 for reinforcement, the glass fiber content can be reduced. Moreover, since the stress by a centrifugal force can be reduced by providing the inclined part 91 in an outer peripheral part, the content rate of glass fiber can be reduced similarly.

  FIG. 7 is a partial cross-sectional view of the bottom part 81 of the fluid balancer 31 according to the embodiment of the present invention. In this embodiment, five fluid passages 83 are formed. A plurality of ribs 84 are provided inside the partition wall 82 at equal intervals outside the fluid passage 83. The ribs 84 are provided to prevent the fluid inside the fluid balancer 31 from moving and causing self-excited vibration when the fluid balancer 31 rotates at a high speed.

  FIG. 8 is a partial sectional view of the upper part 80 of the fluid balancer 31 according to the embodiment of the present invention. In this embodiment, there are six coupling portions 85 that are coupled at the time of spin welding with the bottom part 81. In order to increase the mechanical strength against the centrifugal force of the fluid in the fluid passage 83, the rib 86 is provided in a portion having a partition wall 87 having a large number of parallel portions in the circumferential direction.

  FIG. 9 shows a partial longitudinal section showing a state in which the melted portion blocks the fluid passage 83 during spin welding of the fluid balancer 31. The upper part 80 rotates in the direction of arrow A. At this time, the bottom part 82 is fixed and not rotating. For this reason, the melted resin 89 is formed on the inner and outer circumferences of the joint 88 and stays on both sides of the joint 88 of both parts. Since the ribs 84 are provided at positions where the glass fibers and the resin are kneaded to form a cotton-like resin 89 in the rotation direction on the inner side of the joint portion 88, the retention amount increases as the welding amount increases. The number of fluid passages 83 is increased. Further, since the glass fiber is not melted, the volume of the staying portion is increased with a smaller amount of the molten resin as the amount of the glass fiber is larger. Therefore, reducing the glass content is effective in reducing the staying amount. In addition, the specific heat of glass fiber is 0.16, the specific heat of polypropylene is 0.46, and the glass fiber is about 1/3. The friction energy is easily absorbed by the glass fiber, but the glass fiber itself is not melted and used. Frictional energy does not contribute to the melting of polypropylene. For this reason, friction energy can be effectively utilized by reducing the content rate of glass fiber. Thereby, since the energy at the time of friction acts effectively on the resin without being taken by the glass fiber, the time can be shortened if the melt amount is the same.

FIG. 10 shows the relationship between the heat distortion temperature of polypropylene and the glass fiber content. This heat distortion temperature shows a value when the test method is performed according to ASTM D648 (loading 4.6 kg / cm ² ). When the glass fiber content is 0%, it is about 80 ° C., but at 20%, it is 150 ° C. Moreover, since the temperature at the time of blowing warm air will be 70-110 degreeC, the content rate of glass fiber will be about 5% or more. At the time of spin welding, the upper part 80 is rotated and the joining surface is melted and joined by frictional heat, so that the amount of protrusion increases as the glass fiber content increases, and the fluid passage 83 is retained in the rib 84 portion. Make it easy to plug. The smaller the glass fiber content, the better to reduce the staying amount.

  FIG. 11 shows the relationship between the average value of both glass fiber contents and the amount of molten protrusion δ when the base material is broken. When the glass fiber content is 15% or less, the protrusion amount δ is small because it is not easily affected by the glass fiber, but when the glass fiber content rate is 15% or more, the protrusion amount δ increases. In this data, when the glass content is 0%, the amount of protrusion with respect to the glass content is measured by spin welding using a cylindrical test piece with a protrusion amount of 1 mm when the base material is broken. As can be seen from this, the amount of protrusion increases as the glass fiber content increases. Moreover, the test piece is a combination of the same glass content.

  The upper part 80 and the bottom part 81 which are constituent parts of the fluid balancer 1 are tightly joined by spin welding so that the fluid enclosing the upper part 80 and the lower part 81 does not leak. At the time of spin welding, the bottom part 81 is fixed, and the upper part 80 is rotated and melted to a certain penetration height to join both parts. For the bottom part 81, glass fiber is contained in polypropylene in order to increase the heat distortion temperature. In this embodiment, the glass fiber content is 20 wt%. In the case of spin welding using the upper part 80 having the same glass fiber content as this, the resin and the glass fiber are mixed, and the glass fiber part that does not melt is melted and protrudes to both sides. The amount of protrusion increases as the glass fiber content increases, and the variation increases. For this reason, the resin containing the protruding glass fiber is drawn by the rotation of the upper part 80 and passes through the portion of the fluid passage 83 when the amount is small, but does not stay, but when the amount is large, the resin is evenly spaced in the circumferential direction. A thing that stays in the rib 84 of the arranged bottom part 81 and closes the fluid passage 83 tends to come out. In order to reduce the amount of protrusion, it is necessary to reduce the glass fiber content. As for the amount of penetration of both parts, the lower the glass fiber content, the easier it is to melt, so the upper part 80 is melted first, and the bottom part 81 with the higher glass fiber content is later melted. Therefore, the fluid passage 83 can be secured and the stable fluid balancer 31 can be obtained. Moreover, in order to reduce the content rate of glass fiber, the bottom part with a high content rate of glass fiber is used for the part which directly contacts with the vicinity of the entrance of the rotating drum 29 into which hot air having a high temperature is poured, and the content rate of glass fiber. The upper part 80 having a low thermal deformation temperature is prevented from coming into contact with the rotating drum 29. As a result, the upper part 80 is prevented from being thermally deformed by the warm air even if the glass fiber content is low. Further, since the fluid balancer 31 receives the most load only during the dehydration process in which the rotary drum 29 rotates at a high speed, the upper part 80 inclines the part from the inner periphery to the outer periphery so that it is difficult to receive the centrifugal force of the fluid. Thus, the inclined portion 91 is provided to reduce the portion parallel to the outer periphery, that is, the portion where the force acts at a right angle, thereby reducing the stress due to the centrifugal force. The temperature becomes the highest during the drying step 56. At this time, the rotational speed of the rotary drum 29 is reversed or rotated in one direction at 40 to 55 revolutions per minute, and the rotational speed is small. Since the effect is almost no problem, only the heat distortion temperature should be considered. In the dehydration process 53, the rotational speed of the rotary drum 29 is set to 800 to 1700 revolutions per minute. Since the temperature at this time is almost normal temperature, only the mechanical strength due to centrifugal force needs to be considered. However, since the temperature of the hot air used in the drying step 56 is 70 to 110 ° C., considering the heat deformation temperature, the glass fiber content only needs to be taken into account for the heat deformation, so it may be 5 wt% or more. Further, the glass fiber content for reducing the amount of protrusion during spin welding is 15 wt% or less. That is, the content of the glass fiber having the lower glass fiber content is set to 5 to 15%. In this range, the spin balance of the fluid balancer 31 can be welded with a small amount of protrusion. Therefore, when the operating temperature and the centrifugal force are small, the content of one of the glass fibers is reduced to weld the fluid balancer 31. Workability can be improved. Further, since the amount of protrusion is reduced, it is suitable for welding the fluid balancer 31 in which the interval between the partition walls 82 is narrow at the multistage joint 88 having the fluid passages 83 having four or more stages. In the embodiment of the present invention, the present invention is applied to a drum type washing / drying machine, but the present invention can be similarly applied to a drum type washing machine or a vertical type washing machine and a fluid balancer used in the washing / drying machine.

1 is a perspective view of a drum type washing and drying machine according to an embodiment of the present invention. The longitudinal cross-sectional view of the drum type washing-drying machine which concerns on the Example of this invention is shown. It is a block diagram which concerns on the Example of this invention and shows the driving | operation process of a drum type washing machine. The circuit which drives a drum-type washing machine according to the embodiment of the present invention is shown. The front view of the fluid balancer 31 which concerns on the Example of this invention is shown. The longitudinal cross-sectional view of the fluid balancer 31 by the Example of this invention is shown. The fragmentary sectional view of the bottom part 81 of the fluid balancer 31 according to the embodiment of the present invention is shown. The fragmentary sectional view of the upper part 80 of the fluid balancer 31 according to the embodiment of the present invention is shown. The partial longitudinal cross-section which showed the state by which the fusion | melting part block | closes the fluid channel | path at the time of spin welding the fluid balancer 31 is shown. The relationship with the heat-deformation temperature of a polypropylene with respect to the glass fiber content rate which concerns on the Example of this invention is shown. This relates to the example of the present invention and shows the relationship between the average glass fiber content and the amount of protrusion δ.

Explanation of symbols

29 Rotating drum 30 Laundry 31 Fluid balancer 80 Upper part 81 Bottom part 91 Inclined part

Claims (2)

A rotary drum having an opening formed of a metal material, a fluid balancer provided in an outer peripheral portion of the opening of the rotary drum and enclosing a fluid, and means for blowing warm air into the rotary drum, The fluid balancer is a drum-type washing and drying machine in which the bottom part and the top part are joined by heat welding.
A drum-type washing and drying machine, wherein the glass fiber content of the upper part is less than that of the bottom part.   2. The drum type washing and drying machine according to claim 1, wherein the glass fiber content of the upper part is 5 to 15%.

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