JP5050177B2 - Drum washing machine - Google Patents

Description

  The present invention relates to a drum-type washing machine, and more particularly to a technique for suppressing vibrations when a laundry stored in the drum is centrifugally dehydrated by rotating the drum at a high speed.

  In general, a drum-type washing machine has a configuration in which a cylindrical drum with a circumferential surface is rotatably arranged around a horizontal or inclined axis inside an outer tub disposed in a substantially box-shaped housing. The laundry is stored in this drum and the laundry is washed by rotating the drum at a low speed while water is stored in the outer tub, and the drum is operated at high speed after draining the water in the outer tub. The laundry is centrifuged and dewatered.

  One of the major problems in such a drum-type washing machine is suppression of vibrations that occur during dehydration and associated noise reduction. When rotating a drum at a high speed in a conventional drum-type washing machine, an annular fluid balancer is provided on the end surface of the drum in order to suppress vibration caused by the misalignment of the laundry around the rotation axis. Yes. A fluid balancer is one in which a liquid is sealed inside an annular hollow body, and utilizes a phenomenon in which the liquid forms a concentric free surface with respect to the center of rotation due to centrifugal force during rotation.

  In general, the amplitude of vibration of a rotating body such as a drum increases as the rotational speed increases up to a predetermined resonance rotational speed (referred to as a critical speed) determined by the natural frequency. In the rotational speed range exceeding the speed, it converges to a constant amplitude. When a fluid balancer is provided on this rotating body, the center of the free surface circle of the fluid is located on the opposite side of the eccentric load (position at a rotation angle of 180 °) across the center of rotation at a rotational speed higher than the critical speed. Thus, the vibration amplitude is reduced by acting to cancel the vibration due to the eccentric load. However, in the rotational speed region below the critical speed, the center of the free surface circle of the fluid is located on the same side as the eccentric load with respect to the rotational center, so that the vibration amplitude increases. That is, in the conventional fluid balancer, it is possible to correct the imbalance in the rotational speed region higher than the critical speed, but over the entire rotational speed range including the rotational speed range below the critical speed, There is a fundamental problem that the imbalance cannot be corrected.

  In a drum-type washing machine, the rotational speed of the drum during centrifugal dehydration is usually about 800 to 1000 rpm, and the critical speed is about 200 to 300 rpm although it varies depending on the drum diameter and the like. Therefore, when gradually increasing the drum rotation speed at the start of centrifugal dehydration, there is no effect of the fluid balancer until the critical speed is passed, and the outer tank vibrates greatly and generates loud noise. Depending on the case, the swinging outer tub may come into contact with components mounted inside the housing.

  On the other hand, as a drum-type washing machine for the purpose of suppressing vibration in a relatively low rotational speed region, for example, the one described in Patent Document 1 is known. In this drum type washing machine, a plurality of water storage chambers communicating radially on the inner peripheral side are provided radially at equal intervals inside a hollow hermetic annular body filled with liquid. Then, in a state where the drum is rotated at such a rotational speed that the centrifugal force acting on the laundry accommodated in the drum is larger than the gravity, the position of the eccentric load caused by the deviation of the laundry is determined as the drum circle. When the water storage chamber that is detected on the circumference and close to the detected eccentric position comes above the drum rotation, the drum is temporarily braked, and the liquid held in the water storage chamber is dropped by gravity to cause another water storage chamber Move to. Thereby, the liquid held in the water storage chamber is shifted to the side opposite to the eccentric load caused by the uneven distribution of the laundry with the rotation shaft interposed therebetween, and the eccentricity of the entire drum can be reduced by the balance between the two.

  However, when the rotational speed of the drum is increased beyond the critical speed and water is drained from the laundry as the dehydration proceeds, the magnitude and position of the eccentric load due to the deviation of the laundry may change. Even in this case, since the weight balance of the balancer itself using the water storage chamber as described above does not change, the eccentricity of the entire drum may be increased in some cases. In other words, at a rotational speed that is higher than the critical speed, the vibration may not be effective, but the vibration may be increased.

  For this reason, in order to more reliably suppress vibration and noise that occur during centrifugal dehydration, the imbalance around the rotation axis is effectively corrected over the entire rotation speed range below and beyond the critical speed. There is a strong demand for a drum-type washing machine that can be used.

  Further, in order to perform the balance adjustment as described above, it is necessary to grasp the position of the eccentric load on the rotating drum circumference and decelerate the drum at an appropriate rotation position corresponding to the position. Conventionally, as a reference for the rotational position for performing such eccentric position detection and balance adjustment operation, one pulse signal is generated for each rotation of the drum by a combination of a magnet and a Hall element attached to the rotor of the motor. ing. However, providing such parts increases the cost, and there is a demand for accurately detecting the eccentric position and adjusting the balance without using such parts.

  Further, it is effective to increase the weight of the casing itself in order to suppress the vibration of the casing during centrifugal dehydration. However, if a weight is installed in the housing, the weight of the washing machine itself increases, making it difficult to transport and install. For this reason, there is a demand for a configuration that suppresses vibration of the casing by increasing the weight of the casing as much as possible at the time of centrifugal dehydration without increasing the weight of the washing machine.

  Furthermore, conventionally, a drum-type washing machine having a garment input port on the front face has a problem that the position of the garment input port is low, making it difficult to put laundry in and out of the drum. In order to solve this, a configuration in which the overall height of the casing is increased to increase the position of the outer tub in which the drum is housed can be considered. However, in this case, if the length of the damper that elastically supports the bottom of the outer tub is absorbed in order to absorb the vibration of the outer tub, the effect of suppressing the vibration is reduced.

JP 2003-93790 A

  The present invention has been made to solve the above-mentioned problems, and a first object of the present invention is to simplify the configuration for detecting an eccentric load and adjusting the balance, thereby reducing the cost. It is to provide a drum-type washing machine that can be used.

  The second object of the present invention is to provide a drum type washing machine that can increase the dewatering efficiency while suppressing the vibration of the housing during centrifugal dewatering without increasing the basic weight of the washing machine. There is to do.

  The third object of the present invention is to ensure the strength of the housing structure while maintaining a high vibration suppression effect by the damper in the drum type washing machine having a higher position of the outer tub in order to improve usability. An object of the present invention is to provide a drum-type washing machine that can be used.

The first invention made to achieve the first object is a casing, an outer tub disposed in the casing, and an axis that is horizontally or inclined inside the outer tub. A laundry disposed in the drum by rotating the drum at a low speed in a state where water is stored in the outer tub. A drum-type washing machine for centrifugally dehydrating laundry by discharging water in the outer tub out of the tub and rotating the drum at a high speed, and is disposed at the bottom of the casing, A water storage tank capable of storing water discharged from the tank , a detection means for detecting the presence or amount of water stored in the water storage tank , and a detection result by the detection means during dehydration operation, Larger drums than if none And dewatering control means for allowing the eccentric to run a dehydration startup, or set high drum rotational speed during dewatering operation as water of the reservoir water is large,
It is characterized by having.

The second invention, which is also made to achieve the first object, rotates around a casing, an outer tank disposed in the casing, and a horizontal or inclined axis inside the outer tank. A washing machine accommodated in the drum by rotating the drum at a low speed in a state where water is stored in the outer tub. In a drum-type washing machine for centrifugally dehydrating laundry by discharging the water in the outer tub out of the tub and rotating the drum at a high speed, the laundry is disposed at the bottom of the housing, A water storage tank capable of storing water discharged from the outer tub, a detection means for detecting the presence or amount of water stored in the water storage tank , and a detection result of the drum based on a detection result by the detection means during dehydration operation. Allow the rotational speed to rise to the dehydration speed To, or is characterized dehydration control means for changing the determination threshold eccentricity of the drum to determine the dewatering rotation speed, further comprising a.

In the drum-type washing machine according to the first and second inventions, for example, relatively little dirty water used during the final rinsing process of the washing operation is stored in a water storage tank without being discharged outside the machine, Save water by reusing it in the washing process of washing operation. Therefore, for example, water is stored in the water storage tank at the start of the final dehydration process after the final rinse process, but other intermediate dehydration processes such as after the wash process or after the first rinse process are performed. At the start, the water tank is empty. In addition, for example, when the user selects a course that does not reuse water as described above, there may be a situation where water is not stored in the water storage tank even at the start of the final dehydration process.

Therefore, the detection means detects whether there is water in the water storage tank , for example, at the start of the dehydration process. For example, if the capacity of the water storage tank is 30 L, the weight is about 30 kg in a state where water is fully stored, which is the same as adding a weight of this weight to the housing. Therefore, compared with the case where there is no water in the water storage tank , the vibration is reduced even if the drum has the same eccentricity. Therefore, in the drum type washing machine according to the third aspect of the invention, the dehydration control means allows the dehydration operation to start even if there is a greater eccentricity than when there is no stored water in the water storage tank , for example. To do. As a result, in the state where there is water in the water storage tank , even if there is a deviation of the laundry on the circumference of the drum during the dewatering operation, the vibration does not increase so much, and the time required for dehydration startup is shortened. it can. Even when the same degree of eccentricity occurs, vibration and noise can be suppressed when there is water in the water storage tank , and quietness can be ensured. Further, the dewatering control means increases the drum rotation speed for the dewatering operation as the amount of water stored in the water storage tank increases, for example. Therefore, when there is stored water in the water storage tank , the dewatering efficiency is improved, and for example, the drying operation time can be shortened when the drying is continued.

In the drum type washing machine according to the second aspect of the invention, more specifically, the dehydration control means is based on the detection result of the detection means, and the amount of eccentricity of the drum is greater than when there is water in the water storage tank . The determination threshold value for determining is increased. For example, when the drum rotation speed is increased to the dehydration operation speed under the condition that the eccentric amount is equal to or greater than the determination threshold value, the allowable value of the eccentric amount for starting the dehydration operation is increased by increasing the determination threshold value. In other words, the dehydration operation is easily performed even if the laundry is slightly offset. Further, the dewatering rotation speed for the same eccentric amount may be increased as compared with the case where there is water in the water storage tank . According to this, the dewatering efficiency is improved.

Although the water storage tank itself is provided for the purpose of saving water as described above, for example, even when a course that does not recycle water is selected, for the purpose of suppressing vibration during the dehydration operation. The water discharged from the outer tub may be introduced into the water storage tank , and the stored water may be discharged outside the machine when the dehydration operation is completed.

The third aspect of the present invention made in order to achieve the second object, the center and the substantially box-shaped housing, an outer tub disposed within the housing, a shaft which is horizontal or inclined inside the outer tank A drum-type washing machine comprising: a drum rotatably disposed on the housing ; and two dampers having a generally C-shaped front view that elastically supports the bottom of the outer tub with respect to the bottom of the housing. A water storage tank disposed at the bottom of the body and capable of storing water discharged from the outer tub, and a resin leg with support legs attached to the four corners of the bottom as constituent members of the bottom of the housing and the base portion, so as to sandwich the pair of left and right raised part projecting upward on both right and left sides of the upper surface of the leg base part, each of said pair of right and left raised portions from the upper and lower, extending in the longitudinal direction and fixed thereon metal damper mounting member and fixed to the lower portion extends in the longitudinal direction Includes a pair of right and metal reinforcing member, and a plurality of metallic tank mounting plate mounted to pass insert apart around and extending in the lateral direction with respect to the reinforcing members of the right and left, the damper mounting The lower end of the damper is fixed to the member.

  In the drum type washing machine according to the third aspect of the invention, since the resin raised portion is reinforced by being sandwiched from above and below by the metal damper mounting member and the reinforcing member, the drum type washing machine has sufficient strength to support and support the damper. Can be secured. Thereby, even if the position of the outer tub is made higher than before in order to improve usability, there is no need to change the length of the damper itself, and a sufficient vibration suppressing effect can be obtained.

In the drum type washing machine according to the third aspect of the present invention, the water storage tank can be placed and fixed on the tank mounting plate.

According to this configuration, as described above, the water storage tank having a considerable weight in a state where water is stored can be stably held by the plurality of tank mounting plates. Further, since the metal rectangular frame is formed by the plurality of tank mounting plates and the reinforcing members on both sides, the leg base itself can be reinforced to prevent deformation during transportation and installation.

According to the drum type washing machine according to the first and second aspects of the present invention, when water is stored in the water storage tank , it is possible to suppress the vibration of the housing during the dehydration operation using this. In addition, the weight of the housing itself can be reduced to some extent in anticipation that when water is stored in the water storage tank , it functions as a weight for suppressing vibrations. The burden of transporting and installing the washing machine can be reduced.

  According to the drum type washing machine according to the third aspect of the invention, even when the height of the casing is increased and the position of the outer tub in which the drum is housed is also increased in order to enhance the usability, the length of the damper is made the same as the conventional one. It is possible to avoid a reduction in the vibration suppression effect of the damper.

1 is an external perspective view of a drum type washing and drying machine according to an embodiment of the present invention. The schematic side surface longitudinal cross-sectional view of the drum type washing-drying machine of a present Example. The perspective view of the state which mounted | wore the leg stand part with the damper and the water storage tank in the drum type washing-drying machine of a present Example. The perspective view when the state of FIG. 3 is seen from the bottom side. FIG. 4 is a front longitudinal sectional view at the position of the damper in FIG. 3. The enlarged view of the A section in FIG. The figure which shows a part of cross section in the surface orthogonal to the center axis line P of the balancer in the drum type washing-drying machine of a present Example. Sectional drawing in the B-B 'arrow line | wire and C-C' arrow line in FIG. The electric system block block diagram of the drum type washing-drying machine of a present Example. Schematic which shows the state of the change of the rotational speed of the drum at the time of the spin-drying | dehydration process in the drum type washing-drying machine of a present Example. The control flowchart at the time of the dehydration process in the drum type washing-drying machine of a present Example. The schematic diagram for demonstrating the principle of the balance adjustment in the drum type washing-drying machine of a present Example. The block diagram of the circuit for rotation positioning in the control part of the drum type washing-drying machine by a present Example. FIG. 14 is an operation timing chart of the circuit shown in FIG. 13.

  A drum type washing and drying machine according to an embodiment of the first to third inventions will be described below with reference to the drawings. FIG. 1 is an external perspective view of a drum-type washing / drying machine according to this embodiment, and FIG. 2 is a schematic side longitudinal sectional view of the drum-type washing / drying machine according to this embodiment.

  The casing 1 forming the outer shape of the drum type washing and drying machine has a substantially box shape as a whole. The front surface 1a of the housing 1 is slightly curved from the upper part to the center part, and is slightly inclined upward. A substantially circular clothing input port 1b is formed there, and the clothing input port 1b extends inside. It can be opened and closed with a laterally openable door 2 that can be seen through. In addition, an operation panel 5 that is elongated in the left and right directions and has various operation keys and indicators arranged thereon is provided on the upper portion of the front surface 1a, that is, on the clothes insertion opening 1b. The drawer type dry filter container 7 is also installed on the right side.

  A water supply hose connection port 3 to which the other end of a water supply hose whose one end is connected to a water tap is connected is arranged on the upper surface 1c of the housing 1, and one end is immersed in the bath water in the bathtub on the right side thereof. A bath water hose connection port 4 to which the other end of the bath water hose is connected is arranged. The water supply hose connection port 3 is formed by exposing a water inlet of a water supply valve 21 described later directly to the upper surface, and the bath water hose connection port 4 is formed by exposing the water inlet of the bath water pump 22 directly to the upper surface. Has been.

  As shown in FIG. 2, an outer tub 10 having a substantially cylindrical peripheral surface is moderately rocked inside the housing 1 by a damper 11 that supports the left and right sides and a spring (not shown) that pulls the upper part. It is held freely. A front surface of the outer tub 10 is formed with an outer tub front surface opening 10a that is open in a circular shape relative to the clothing input port 1b of the housing 1, and a peripheral edge portion of the outer tub front surface opening 10a and a peripheral edge portion of the clothing input port 1b. Are connected by a flat cylindrical packing 12 made of an elastic material such as rubber.

  Inside the outer tub 10, a drum 13 having a substantially cylindrical shape for accommodating laundry is supported by a main shaft 14 that extends in the front-rear direction and is inclined forward. The front end surface of the drum 13 is formed with a drum front opening 13a that is widely opened. When the door 2 is opened, the interior of the drum 13 is passed through the outer tank front opening 10a and the drum front opening 13a from the upper front side. You can peek into it. Here, the inclination angle θ of the central axis C of the drum 13, that is, the central axis of the main shaft 14 is set to about 15 ° with respect to the horizontal line, but this is an example, and the inclination angle θ is about 10 to 30 °, for example. Is set at an appropriate angle.

  The front end of the main shaft 14 is firmly fixed to the rear surface of the drum 13 and is rotatably supported by a bearing 16 held by a bearing fixing member 15 mounted on the rear surface portion of the outer tub 10. A rotor 172 of an outer rotor type motor (drum motor) 17 as a direct drive motor is attached to the end of the main shaft 14 protruding rearward of the outer tub 10, while the bearing fixing member 15 has a motor 17. The stator 171 is fixed. The rotor 172 including the permanent magnet is disposed so as to surround the outer peripheral side of the stator 171 including the winding. When a drive current is supplied to the stator 171, the rotor 172 rotates and is identical to the rotor 172 via the main shaft 14. The drum 13 is rotationally driven at a rotational speed of.

  In the upper space in the housing 1, a water supply unit 20 including a water supply valve 21, a bath water pump 22, and a water inlet 23 is disposed. The water inlet directed to the upper side of the water supply valve 21 is the water supply hose connection port 3, and the water inlet directed to the upper side of the bath water pump 22 is the bath water hose connection port 4. A water injection port 23 that allows the detergent container 6 to be pulled out is disposed in front of the water supply valve 21, and water supplied to the water injection port 23 via the water supply valve 21 and the bath water pump 22 mainly passes through the interior of the detergent container 6. As a result, the water is supplied into the outer tub 10 from the water throat 25 provided at the rear portion of the outer tub 10 through the irrigation pipe 24 connected to the bottom of the water throat 23.

  As described above, the water that has been supplied and stored in the outer tub 10 flows into the drum 13 through the water passage holes 13 b that are perforated in the peripheral wall surface of the drum 13. Further, the water discharged from the laundry in the drum 13 during centrifugal dehydration due to the high-speed rotation of the drum 13 scatters to the outer tub 10 side through the water passage hole 13b. A drain outlet 26 is provided behind the bottom of the outer tub 10, and the drain outlet 26 is connected to an inlet of a drain valve 27. When the drain valve 27 is opened, water stored in the outer tub 10 is stored. Is discharged through a drainage hose (not shown) drawn out from the left or right discharge ports 29a, 29b formed at the lower side of the casing 1 to the outside of the machine.

  On the other hand, the drain outlet 26 is also connected to the inlet of the water storage valve 31, and when the drain valve 27 is closed and the water storage valve 31 is opened, the water stored in the outer tub 10 is drained from the drain pipe. Instead of 28, it flows into a water storage tank 30 having a capacity of about 30 liters, which is installed in the housing 1 below the outer tub 10. Thereby, the water once used for washing can be stored in the water storage tank 30 without discarding. The water storage tank 30 and the water inlet 23 are connected by a circulating water channel 33, and a middle water pump 32 is provided in the middle thereof.

  In this drum type washing and drying machine, after the final rinse with tap water is executed, the water used for the rinse is stored in the water storage tank 30 without being discarded. The water storage tank 30 is provided with a purification device (not shown) for purifying stored water (so-called middle water), and propagation of various germs is suppressed by the action of this purification device. When the intermediate water supply is designated at the time of the next washing, the intermediate water pump 32 is activated at the time of water supply execution, the intermediate water stored in the water storage tank 30 is sucked and sent to the water inlet 23 through the circulating water channel 33. Then, it is supplied into the outer tub 10 through the detergent container 6 instead of tap water or bath water. Thereby, the amount of water used for washing can be significantly reduced as compared with the prior art. The intermediate water can also be used for dehumidification during the drying operation.

  Although not shown in FIG. 2 in order to avoid complexity, the drum type laundry dryer of the present embodiment also has a function of drying the dehydrated laundry. That is, a ventilation path having an inlet end at the lower rear surface of the outer tub 10 and an outlet end at the upper front surface of the outer tub 10 is connected. In the ventilation path, along the air flow, the dehumidifying section and the drying filter container 7 A drying filter, a fan, and a heater housed in the housing are provided. Thus, during the drying operation, the air flow generated by the fan is heated by the heater and then supplied into the outer tub 10. When the heated air passes through the inside of the drum 13, it exchanges heat with the laundry to take away moisture, and water vapor in the air is removed in the dehumidifying section. The dried air after dehumidification passes through the drying filter, circulates through the fan and returns to the heater.

  As described above, the drum type washing and drying machine of the present embodiment includes the water storage tank 30 below the outer tub 10, and the total height of the casing 1 is high by that amount (about 100 to 200 mm). The position of the outer tub 10 is also higher. Since the length of the damper 11 whose upper end is fixed to the outer tub 10 by the upper end mounting bracket 11a in order to ensure the vibration absorbing performance cannot be increased, here the mounting structure of the lower end of the damper 11 is as follows. Yes. The bottom structure of the housing 1 including the damper lower end mounting structure will be described with reference to FIGS.

  3 is a perspective view of a state in which the damper 11 and the water storage tank 30 are mounted on a leg base 80 that is a member constituting the bottom of the housing 1, and FIG. 4 is a perspective view of the state of FIG. 3 viewed from the bottom side. FIG. 5 is a front longitudinal sectional view at the position of the damper 11 of FIG.

  The leg base 80 is a resin molded product, and disk-like rubber support legs 85 are attached to the four corners of the bottom surface (note that the support leg 85 is attached to only one place in the figure). On the upper surface of the leg base 80, a raised portion 80a is formed projecting upwardly on the inner sides of the left and right side walls on the slightly rear side from the center, and a large opening is formed between the raised portions 80a on both sides. A damper mounting member 81 made of metal and having a substantially U-shaped cross section is mounted on each of the left and right raised portions 80a so as to extend in the front-rear direction, and is fixed to the leg base portion 80 with four screws. Further, a reinforcing member 82 which is made of metal and has a U-shaped cross section and is longer than the damper mounting member 81 is attached below the raised portion 80a so as to extend in the same direction as the damper mounting member 81, that is, the front-rear direction. It is done. The reinforcing member 82 extends to the vicinity of the front and rear support legs 85.

  Further, two tank mounting plates 83 made of metal extending in the left-right direction are attached so as to pass between the left and right reinforcing members 82. Specifically, a positioning pin 80b protrudes downward at a predetermined position on the lower surface of the leg base 80 where the reinforcing member 82 is in close contact. Then, the mounting positions in the front-rear direction of the tank mounting plates 83 are determined so that the positioning holes drilled at both ends of the tank mounting plate 83 are inserted into the positioning pins 80b. It is attached. Then, at the place where the reinforcing member 82 and the tank mounting plate 83 overlap each other, the both members 82 and 83 are fastened to the leg base portion 80 with bolts 84 from below. Since the two reinforcing members 82 and the two tank mounting plates 83 are assembled in a rectangular shape, the strength of the leg base 80 itself is improved, and deformation such as twisting is less likely to occur.

  The water storage tank 30 has a positioning pin 30a projecting downward on its lower surface, and its position is determined such that the positioning pin 30a is inserted into a positioning hole 83b formed in the tank mounting plate 83. In such a positioned state, since the boss of the water storage tank 30 is positioned on the screw hole 83a formed in the tank mounting plate 83, the screw inserted into the screw hole 83a is screwed into the boss. The water storage tank 30 is fixed to the tank mounting plate 83.

When the water storage tank 30 is filled with water, it becomes a considerable weight (about 30 kg in this case), but the two tank mounting plates 83 for holding the water storage tank 30 are sandwiched between the reinforcing member 82 and the leg base 80. Therefore, the water tank 30 can be held stably with sufficient strength. Further, the raised portion 80a integrated with the leg base portion 80 is made of resin and has lower strength than metal, but is sandwiched from above and below by a high strength damper mounting member 81 and a reinforcing member 82. The strength of the raised portion 80a is increased, and no damage occurs even if a force from a damper 11 described later is applied.

  The lower ends of the left and right dampers 11 are fixed to the above-described damper mounting member 81 by the lower end mounting bracket 11b. Therefore, even if the length of the damper 11 is the same as the conventional one, the damper 11 can be mounted at a higher position by the raised portion 80a, and the damper 11 exhibits the same vibration suppression (absorption) effect as the conventional one.

  Next, the structure of the annular balancer 40 mounted around the drum front opening 13a of the drum 13 in the drum type washing and drying machine of the present embodiment will be described with reference to FIGS. 6 is an enlarged view of a portion A in FIG. 2, FIG. 7 is a view showing a part of a cross section in a plane orthogonal to the central axis C (rotation axis) of the balancer 40, and FIG. It is sectional drawing in an arrow line of sight and CC 'arrow line of sight.

  The balancer 40 is a unit in which two members made of synthetic resin are butted and integrated by vibration welding. In order to ensure the area of butting at the time of welding on the inner and outer wall surfaces of both members, An expanding flange is formed, and the flanges of both members are integrated by welding to form ribs 40e and 40f. As shown in FIG. 6, the drum 13 includes a barrel member 131 in which a stainless steel plate is formed in a cylindrical shape, and an annular front end surface member 132 that forms a front end surface. It has a letter shape, and an edge portion on the inner peripheral side is a curled portion 133 that is wound in a substantially semicircular shape in the outer peripheral direction. The outer peripheral side edge portion of the front end surface member 132 and the front edge end portion of the body member 131 are joined by caulking and fixed by screws 135 screwed from the outside of the body member 131.

  A recess having a substantially U-shaped cross section of the front end surface member 132 is configured such that the balancer 40 can be accommodated by about half. Thus, when the balancer 40 is accommodated in the recess, the outer rib 40f abuts against the caulking portion 134. The inner circumferential side rib 40e contacts the curled portion 133. The balancer 40 thus housed in the recess is fixed to both the members 131 and 132, that is, to the drum 13 by screws 135 that join the front end face member 132 and the body member 131. .

  The balancer 40 is a concentric annular shape and has four annular flow paths with different diameters, which are sequentially denoted by reference numerals 40a, 40b, 40c, and 40d from the inner circumferential side, and each of the annular flow paths 40a, 40b, 40c, and 40d includes Each of them is filled with a predetermined amount of liquid (for example, calcium chloride solution). A partition wall 41 is provided inside each of the annular channels 40a, 40b, 40c, and 40d so as to extend inward from the outer peripheral side wall surface at every predetermined angle (about 15 ° in this example). An inner peripheral side communication opening 42 that is elongated in the rotation axis direction is formed between the inner peripheral side edge of each partition wall 41 and the inner peripheral side wall surface of the annular flow path, and the outer peripheral side that is the base of each partition wall 41 A short outer peripheral side communication opening 43 that extends in the same direction along the wall surface in the direction of the rotation axis is formed. Thereby, the adjacent compartments partitioned by the partition wall 41 communicate with each other through the inner peripheral side communication opening 42 and the outer peripheral side communication opening 43.

  Here, the following points are important in order to effectively suppress the vibration of the drum 13 in the dehydrating operation described later. That is, basically, the interval between the partition walls 41 is narrowed in order to limit the sudden movement of the liquid sealed inside. The angle interval between adjacent partition walls 41 is preferably about 30 ° or less, and in the present embodiment, this is set to 15 °.

  Further, in order to move the liquid using gravity during balance adjustment described later, the communication openings 42 are provided on the inner peripheral side of the partition wall 41, but each compartment has a centrifugal force greater than gravity. Therefore, it is necessary to ensure that the liquid held in the partition wall 41 does not get over the partition wall 41 and the capacity of the liquid that can be held in each compartment is sufficiently secured. Therefore, each partition wall 41 has a high height h. The height h of the partition wall 41 and the height s of the inner peripheral side communication opening 42 are preferably in a relationship of 0.2 ≦ s / (h + s) ≦ 0.3. Here, this value is 0.26. Is set.

  Further, in order for this balancer 40 to function as a so-called fluid balancer, it is necessary for the liquid to be able to move in the circumferential direction during high-speed rotation. However, the balancer 40 is held in one or more compartments by the balance adjustment described above. There is also a need to avoid the liquid moving easily to other compartments. Therefore, the area of the outer peripheral side communication opening 43 is reduced. The area D of the outer peripheral side communication opening 43 and the area E of the partition wall 41 are preferably in a relationship of D / E ≦ 0.1. Here, this value is set to 0.045. The vibration suppressing action of the balancer 40 having such a structure will be described later.

  FIG. 9 is a block diagram of the electric system of the drum type washer / dryer of this embodiment. The control unit 50 is mainly composed of a microcomputer including a CPU, ROM, RAM, timer, and the like. Based on a control program stored in the ROM, each process of washing, rinsing, dehydration and drying is performed. Various controls are performed to perform driving operations. The control unit 50 receives a key input signal from an operation unit 53 provided on the operation panel 5 in order for a user to give various settings and instructions, and detects the water level stored in the outer tub 10. Detection signals are input from the water level detection unit 55 in the outer tub, the water level detection unit 56 in the water tank that detects the water level of the water stored in the water tank 30, and the like.

  An inverter drive unit 52 is connected to the control unit 50, and receives a signal from a rotation sensor 59 that generates a pulse signal as the drum motor 17 rotates, and the drum motor 17 is connected via the inverter drive unit 52. Control the rotation. The rotation sensor 59 is a position sensor using a Hall element, and here, 72 pulse signals are generated at an equal rotation (5 °) angular interval per rotation of the drum motor 17 (that is, per rotation of the drum 13). Therefore, when the drum motor 17 rotates accurately at a constant speed, pulse signals are generated at equal time intervals, and the control unit 50 detects the rotation speed of the drum motor 17 based on the time intervals of adjacent pulse signals. Can do.

  In addition, a load driving unit 51 is connected to the control unit 50, and the water supply valve 21, the bath water pump 22, the drain valve 27, the water storage valve 31, the middle water pump 32, and the like described above are connected via the load driving unit 51. The operations of the drying fan motor 57 and the PTC heater 58 are controlled. Furthermore, the control unit 50 sends a display signal to the display unit 54 so as to perform a display corresponding to the operation of the operation unit 53 and a display for notifying the progress of driving.

  Next, the characteristic control during the dehydration operation in the drum type washing and drying machine of the present embodiment will be described. FIG. 10 is a diagram showing a schematic change state of the rotation speed of the drum 13 during the dehydration stroke, and FIG. 11 is a control flowchart during the dehydration stroke. In this drum-type washing and drying machine, intermediate dehydration is performed after the washing operation and the rinsing operation excluding the final rinse, and final dehydration is performed after the final rinse. The dehydration process here refers to intermediate dehydration and final dehydration. Includes both.

  When the dehydration process is started, the control unit 50 first determines whether or not there is water in the water storage tank 30 based on the detection signal from the water level detection unit 56 in the water storage tank (step S10). Here, it is determined that there is water when water above a certain level is stored. When it is determined that there is water, the four determination thresholds Ta, Tb, Tc, and Td, which are criteria for determining the eccentricity, are determined as Ta1, Tb1, Tc1, and Td1, respectively. Tb, Tc, and Td are determined as Ta2, Tb2, Tc2, and Td2, respectively (steps S12 and S14). When there is water in the water storage tank 30, the weight of the water storage tank 30 is considerably larger than when there is no water, and since this functions as a weight, there is an effect of suppressing vibration of the housing 1. Therefore, by setting Ta1> Ta2, Tb1> Tb2, Tc1> Tc2, and Td1> Td2, when there is water in the water storage tank 30, the determination threshold value is increased, and a larger amount of eccentricity is allowed.

  When each determination threshold is determined, the drum motor 17 is operated via the inverter drive unit 52, and control is performed to increase the rotational speed of the drum 13 to 100 rpm (step S16). When the drum 13 is rotated at 100 rpm, the centrifugal force acting on the laundry in the drum 13 becomes larger than gravity, and the laundry is completely attached to the drum 13 in a state where it is stuck to the inner peripheral surface of the drum 13. Rotate. When it is detected that the rotation speed has reached 100 rpm based on the pulse signal obtained by the rotation sensor 59, the control unit 50 performs speed control so as to maintain the rotation speed at 100 rpm, and in that state, the first eccentricity is performed. Quantity detection is executed (step S18).

  The amount of eccentricity is obtained on the basis of fluctuations in actual rotational speed when constant speed control is performed so as to maintain the rotational speed of the drum 13 at 100 rpm. That is, when an eccentric load is present on the drum 13, when the eccentric load moves downward from above the drum 13 as the drum 13 rotates, the eccentric load acts to accelerate the drum 13. Acts to decelerate the drum 13 from the bottom to the top of the drum 13. Since the rotation speed fluctuates during one rotation of the drum 13 by the acceleration action and the deceleration action, the control unit 50 obtains the speed fluctuation by measuring the time interval of the pulse signal obtained from the rotation sensor 59, and this fluctuation amount. The amount of eccentricity is estimated according to Let X be the amount of eccentricity detected at this time. The details of the eccentricity calculation method will be described later.

  The controller 50 determines whether or not the detected eccentric amount X is equal to or less than the determination threshold Ta (step S20). If the amount of eccentricity X exceeds the determination threshold value Ta, the eccentricity cannot be corrected even by balance adjustment described later. Therefore, the rotational speed of the drum 13 is reduced or temporarily stopped and the loosening operation is executed (step S22). ) Return to step S16. Since the determination threshold Ta is Ta1 or Ta2 and Ta1> Ta2 as described above, if there is water in the water storage tank 30, the probability of shifting to the loosening operation is reduced even if a larger amount of eccentricity exists.

  If the eccentricity amount X is less than or equal to the determination threshold value Ta in step S20, it is next determined whether or not the eccentricity amount X is less than or equal to the determination threshold value Td (step S26). Since Td <Ta, the eccentricity amount X may exceed the determination threshold value Td even if it is equal to or less than the determination threshold value Ta. The determination threshold value Td at this time is a maximum value that falls within a range in which vibration is allowed when the drum 13 rotates at a high speed. Therefore, if it is determined in step S26 that the eccentricity amount X exceeds the determination threshold value Td, if the rotation speed of the drum 13 is increased without performing balance adjustment, abnormal vibration is likely to occur, which will be described later. The balance adjustment operation is executed (step S28), and then the process returns to step S18 to check the eccentricity after the balance adjustment is executed.

  If it is determined in step S26 that the eccentric amount X is equal to or less than the determination threshold value Td, the control unit 50 controls the drum motor 17 via the inverter driving unit 52 so as to increase the rotation speed of the drum 13 from 100 rpm (step S26). S30). Until the rotation speed reaches 300 rpm, the amount and position of the eccentric load are continuously detected. The resonance rotational speed of the swinging mechanism unit including the drum 13 and the outer tub 10 in this drum-type washing / drying machine is about 250 rpm on average although it depends on the amount of laundry accommodated in the drum 13. . Therefore, the vibration tends to increase as the rotational speed approaches 250 rpm. However, particularly when the rotational speed of the drum 13 exceeds 140 to 160 rpm, the positions are separated from each other in the axial direction and opposite to each other with the rotational axes therebetween. The effect of two eccentric loads (hereinafter referred to as opposed eccentricity) that begins to appear significantly begins to appear, and even when the amount of eccentricity when viewed in the circumferential direction of the drum 13 is small, vibration due to opposed eccentricity is large. Begin to become.

  Although not described in detail here, the degree of opposing eccentricity can be estimated by using the change in acceleration during one rotation when the speed increase of the drum 13 is controlled to be kept constant. Therefore, during the period when the rotational speed is increased as described above, the eccentricity amount Y due to the opposing eccentricity is repeatedly detected (step S32), and it is determined whether or not the eccentricity amount Y is equal to or less than the determination threshold value Tb (step S32). Step S34). When the eccentric amount Y exceeds the determination threshold value Tb, the rotational speed of the drum 13 is decreased and the laundry loosening operation is executed (step S22). If the rotation speed passes through the resonance rotation speed without any problem and becomes 300 rpm or more, the rotation speed is further increased to 500 rpm, and if the rotation speed reaches 500 rpm, control is performed to maintain it (step S36).

  Although the rotation speed at this time is lower than 1000 rpm which is the maximum rotation speed of the dehydration operation, the rotation speed is such that a considerable amount of water contained in the laundry can be squeezed out. At this time, a large centrifugal force acts on the liquid in the balancer 40, and the liquid sticks to the outer peripheral side wall surface in each of the annular flow paths 40a, 40b, 40c, and 40d. Therefore, it can be considered that the inner peripheral side communication opening 42 does not exist, and the liquid moves through the outer peripheral side communication opening 43 so that the eccentricity of the entire drum 13 is reduced. That is, the balancer 40 functions as an original fluid balancer and suppresses vibration.

  However, since the laundry in the drum 13 is lightly squeezed from the time when the balance adjustment is performed to this time, the weight of the laundry greatly changes particularly in clothes such as chemical fibers that easily drain water. There is a possibility. If this change exceeds the eccentricity suppression possible range of the balancer 40 functioning as a fluid balancer, there is a possibility that the balance of weight is lost by lightly squeezing the laundry, and the amount of eccentricity is greatly increased. . Although it is desirable to further increase the rotational speed from the viewpoint of dewatering efficiency, if the rotational speed is increased while the amount of eccentricity is greatly increased as described above, abnormal vibration may be caused. Therefore, in the state where the rotation speed is 500 rpm, the eccentricity amount Z is detected by the same processing as that of the opposed eccentric load detection (step S38).

  Then, it is determined whether or not the eccentricity amount Z is equal to or less than the determination threshold value Tc (step S40). If the eccentricity amount Z exceeds the determination threshold value Tc, an increase in the eccentricity amount is large, and therefore, if the dehydration operation is continued, abnormal vibration occurs. The drum 13 is temporarily stopped or decelerated to a speed close to that, and the loosening operation is executed (step S22), and the process returns to step S16 to restart dehydration. On the other hand, if the amount of eccentricity Z is equal to or less than the determination threshold value Tc, the rotational speed is further increased to 1000 rpm and the dehydration operation is performed (step S42). Note that the determination threshold value for determining the eccentric amount Z may be set in a plurality of stages, and the maximum rotation speed of the dehydrating operation may be divided into three stages of 800 rpm, 900 rpm, and 1000 rpm depending on which range the eccentric amount Z falls within. Thus, during the period when the drum 13 is rotated at high speed to perform dehydration, vibration is suppressed by the movement of the liquid in the balancer 40, that is, by the function of the fluid balancer.

  Next, the balance adjustment executed in step S28 will be described in detail. FIG. 12 is a schematic diagram for explaining the principle of balance adjustment. In this figure, only one annular flow path in the balancer 40 is enlarged, and the interval between adjacent partition walls 41 is also wider than in the above embodiment. Further, the outer peripheral side communication opening provided in the partition wall 41 is also omitted.

  The interior of the balancer 40 is divided into a plurality of compartments 44 by radially dividing walls 41. The compartments 44 communicate with each other through the inner peripheral side communication opening 42, but free movement of the liquid sealed inside is prevented by the partition wall 41. Therefore, when the drum 13 is rotated at such a rotational speed that the centrifugal force acting on the liquid sealed in the balancer 40 is superior to the weight, the liquid is held in each of the compartments 44 by shifting to the outer peripheral side in each of the compartments 44. Is done. Therefore, if the movement of the liquid by the outer peripheral side communication opening 43 is ignored (actually, it can be ignored in a short time range), each compartment 44 is placed at its position by the weight of the liquid held therein. It can be considered that a weight is added.

  When the same amount of liquid is held in all the compartments 44, the amount of eccentricity by the balancer 40 can be regarded as almost zero. On the other hand, when the liquid is held in the specific compartment 44 by being offset, an unbalance occurs around the rotation axis by the balancer 40, and an eccentric load exists. In the case where an eccentric load is generated due to the offset of the laundry that is rotating while being stuck to the inner peripheral surface of the drum 13, the eccentric load of the balancer 40 is intended to be balanced with the eccentric load caused by the laundry. If the weight balance is changed so as to be generated automatically, the eccentric amount of the entire drum 13 is reduced.

  As shown in FIG. 12A, the drum 13 is rotating at, for example, 100 rpm, and the amount of liquid held in each compartment 44 is substantially equal, that is, the balancer 40 itself has no eccentric load. think of. At this time, it is assumed that an eccentric load W exists due to the deviation of the laundry in the circumferential direction of the drum 13. In this case, the amount and position of the eccentric load of the entire drum 13 is detected based on fluctuations in the rotational speed of the drum 13 in the state of constant speed control, and the drum 13 is detected at a predetermined timing according to the detected eccentric position. Reduce the rotational speed for a short time. Then, the centrifugal force acting on the liquid during the deceleration period decreases, and as shown in FIG. 12 (b), the liquid passes through the inner circumferential side communication opening 42 from the compartment 44a that is rotating upward at that time. Flows out and moves to another compartment 44.

  That is, since the distribution of the amount of liquid stored in each compartment 44 changes and eccentricity occurs in the balancer 40 itself, the eccentric load caused by the deviation of the laundry by appropriately determining the timing of deceleration of the drum 13 The amount of liquid in the compartment near the position where W is present can be reduced, and the amount of liquid in the compartment near the position facing it can be increased. By repeating such a deceleration operation one or more times, finally, as shown in FIG. 12 (c), the liquid in the compartment 44a in the vicinity of the position where the eccentric load W caused by the deviation of the laundry exists is removed. The amount of liquid in the compartment 44b facing the rotation shaft is increased. Thereby, the eccentric load caused by the balancer 40 and the eccentric load caused by the deviation of the laundry are well balanced, and the unbalance of the entire drum 13 can be corrected.

  When performing the balance adjustment described above, it is necessary to detect the position of the eccentric load. However, in this drum type washing and drying machine, the drum motor 17 and the drum 13 are not provided with an absolute rotational position reference. In other words, a detection mechanism (usually a combination of a magnet and a hall element) that generates a pulse signal by detecting this when the drum motor 17 or drum 13 reaches a certain position during one rotation period. Not provided. Therefore, the eccentric load detection in step S18 is performed as follows. FIG. 13 is a configuration diagram of a rotation positioning circuit in the control unit 50, and FIG. 14 is an operation timing chart of the circuit of FIG.

  The first counter 70 counts up 72 pulse signals P1 generated during one rotation of the drum 13 obtained by the rotation sensor 59 as a clock signal, and when the count value reaches “72”, the predetermined value detection unit 71 generates a pulse. The signal P2 is generated and the first counter 70 is reset. Therefore, the first counter 70 outputs a count value α of 0 to 71 during a period corresponding to one rotation of the drum 13, and repeats this as long as the drum 13 is rotating. Since the second counter 72 counts up using the pulse signal P2 generated by the predetermined value detector 71 as a clock signal, the count value β increases by one every time the drum 13 rotates exactly once. Although the generation position of the pulse signal P2 is not an absolute position during one rotation of the drum 13 or the drum motor 17, the pulse signal P2 is always generated every rotation of the drum. The position of the eccentric load can be expressed by the value of.

  Specifically, the control unit 50 detects the amount and position of the eccentric load as follows. That is, if the rotational speed is within the range of 100 ± 2 rpm, the speed data obtained every time the pulse signal P1 from the rotation sensor 59 is input (data indicating the time interval between two continuous pulse signals P1). 120 pieces are acquired. The 120 pieces of speed data are information reflecting a speed change during a period in which the drum 13 rotates about 1.7 times. For the 120 pieces of speed data, a moving average of 15 pieces of speed data adjacent in time is calculated in order. As a result, 106 moving average values are obtained, and 15 moving averages are calculated again in order. As a result, 92 second moving average values are obtained.

  Then, the difference between the 92 moving average data that are temporally adjacent to each other is calculated to obtain 91 difference data. When there is an eccentricity due to the deviation of the laundry in the circumferential direction of the drum 13, since one acceleration action and a deceleration action occur during one revolution of the drum 13 as described above, the one rotation period One maximum point and one minimum point of the difference data are generated. Therefore, the local maximum point and the local minimum point are found in the 91 differential data described above, the magnitude of the eccentric load is obtained from the difference between the local maximum value and the local minimum value, and the position where the local maximum point (or local minimum point) exists ( The position of the eccentric load is detected by the count value α).

  However, since the influence of disturbance or the like cannot be eliminated by only one procedure as described above, 120 times of the speed data is acquired at the same time (that is, 120 of the same 1.7 rotation period). The amount and position of the eccentric load are obtained by the same procedure four times, and the average is taken so that individual velocity data can be obtained. The amount of eccentricity thus obtained is the amount of eccentricity X in step S18.

When the amount of eccentricity X exceeds the determination threshold Td, the drum 13 is temporarily decelerated at a predetermined timing as described above to move and balance the liquid held in each compartment in the balancer 40. Various parameters necessary for the control, that is, deceleration timing, deceleration time, deceleration speed, acceleration time, acceleration speed, etc. are determined in consideration of the position information of the eccentric load detected immediately before. . The timing at which the brake is applied to actually decelerate is determined based on the generation position of the pulse signal P2. Therefore, the second counter 72 is not reset during the period from the detection of the magnitude and position of the eccentric load to the end of the balance adjustment for correcting it.

  As described above, in the drum type washer / dryer of the present embodiment, the actual position of the drum 13 on the circumference every time the power is turned on without providing an absolute reference indicating the rotational position of the drum 13 or the drum motor 17. It is possible to reduce the eccentric load by performing an eccentric position detection, a balance adjustment operation, and the like by using a relative reference whose correspondence relationship changes. As a result, it is possible to prevent abnormal vibrations from occurring even in the vicinity of the resonance rotational speed at which vibrations are greatest.

  In the drum type washer / dryer of the above embodiment, only the presence or absence of water in the water storage tank 30 is determined by the water level detection unit 56 in the water storage tank. For example, a sensor that can measure the amount of water (or water level) more finely. Is used, the higher the amount of water, that is, the greater the weight of the water storage tank 30, the higher the maximum rotation speed of the drum 13 during the dehydration operation can be set to increase the dewatering efficiency.

  The drum-type washing machine according to the present invention is not limited to the configuration shown in the above-described embodiment, and can be applied to various forms, and includes various forms within the technical scope of the present invention. .

DESCRIPTION OF SYMBOLS 1 ... Housing | casing 10 ... Outer tank 11 ... Damper 11a ... Upper end mounting bracket 11b ... Lower end mounting bracket 12 ... Packing 13 ... Drum 14 ... Main shaft 15 ... Bearing fixing member 16 ... Bearing 17 ... Drum motor 30 ... Water storage tank 30a ... Positioning pin DESCRIPTION OF SYMBOLS 31 ... Water storage valve 32 ... Middle water pump 33 ... Circulating water channel 40 ... Balancer 40a, 40b, 40c, 40d ... Annular channel 41 ... Partition wall 42 ... Inner peripheral side communication opening 43 ... Outer peripheral side communication opening 44 ... Compartment room DESCRIPTION OF SYMBOLS 50 ... Control part 51 ... Load drive part 52 ... Inverter drive part 56 ... Water level detection part 59 in a storage tank ... Rotation sensor 70 ... 1st counter 71 ... Predetermined value detection part 72 ... 2nd counter 80 ... Leg base part 80a ... Raising Portion 80b Positioning pin 81 Damper mounting member 82 Reinforcing member 83 Tank mounting plate 83a Screw hole 83b Positioning hole 84 Bolt 85 Support leg

Claims (3)

A housing, an outer tub disposed in the housing, a drum rotatably disposed around a horizontal or inclined shaft inside the outer tub, and a motor that rotationally drives the drum. Equipped,
The laundry stored in the drum is washed by rotating the drum at a low speed while water is stored in the outer tub, and the water in the outer tub is discharged out of the tub to drive the drum at high speed. In a drum-type washing machine that spins and dewaters laundry by rotating with
A water storage tank disposed at the bottom of the housing and capable of storing water discharged from the outer tub;
Detecting means for detecting the presence or amount of water stored in the water storage tank ; and
Based on the detection result of the detection means during the dehydration operation, a dehydration start-up that allows a larger eccentricity of the entire drum than when there is no stored water is performed, or the amount of the stored water is larger Dehydration control means for setting a high drum rotation speed during dehydration operation;
A drum-type washing machine comprising: A housing, an outer tub disposed in the housing, a drum rotatably disposed around a horizontal or inclined shaft inside the outer tub, and a motor that rotationally drives the drum. And washing the laundry stored in the drum by rotating the drum at a low speed while water is stored in the outer tub, and discharging the water in the outer tub to the outside of the tub. In a drum-type washing machine for centrifugally dewatering laundry by rotating the drum at high speed,
A water storage tank disposed at the bottom of the housing and capable of storing water discharged from the outer tub;
Detecting means for detecting the presence or amount of water stored in the water storage tank ; and
Based on the detection result of the detection means during the dehydration operation, it is allowed to increase the drum rotation speed to the dehydration operation speed, or the dehydration is performed to change the determination threshold for determining the eccentric amount of the drum in order to determine the dehydration rotation speed. Control means;
A drum-type washing machine comprising: A substantially box-shaped housing, an outer tub disposed in the housing, a drum disposed to be rotatable around a horizontal or inclined shaft inside the outer tub , and the bottom of the housing In a drum-type washing machine comprising two dampers having a generally C-shaped front view that elastically supports the bottom of the outer tub,
A water storage tank disposed at the bottom of the housing and capable of storing water discharged from the outer tub;
As a constituent member of the bottom of the housing,
Resin footrests with support legs attached to the four corners of the bottom ,
A pair of left and right raised portions protruding upward on the left and right sides of the upper surface of the leg base ,
Wherein each of the pair of left and right raised part so as to sandwich from above and below, right and left pair metal which extends in the longitudinal direction and fixed to the damper mounting member and the lower its metal to be stretched in the longitudinal direction and fixed thereon A reinforcing member;
A plurality of metal tank mounting plates that are attached to the left and right reinforcing members so as to extend in the left-right direction and to be spaced apart in the front-rear direction;
With
Fixing the lower end of the damper to the damper mounting member ;
A drum type washing machine , wherein the water storage tank is mounted and fixed on the tank mounting plate .