KR960005804B1 - Washing machine - Google Patents

Abstract

No content.

Description

washer

1 is a cross-sectional view of a washing machine according to an embodiment of the present invention.

2a is a plan view of a rotating pulsator.

FIG. 2B is a cross-sectional view of the rotary vane shown in FIG. 2A.

Figure 3a is a plan view of the cap fitted to the central portion of the rotary vane.

FIG. 3B is a sectional view of the cap shown in FIG. 3A.

4 is a partially enlarged cross-sectional view near the nozzle mount.

FIG. 5 is an enlarged cross-sectional view of the vicinity of the protrusion of the nozzle in FIG. 4; FIG.

6 is a cross-sectional view showing an example of a nozzle shape.

7 is a partially enlarged cross-sectional view near the drainage path.

8 is a cross-sectional view showing an example of a washing machine having a variable discharge air pump.

9 is a block diagram for explaining the concept of controlling the rotational force and the amount of air supply of the rotary blades.

FIG. 10 is a graph showing the relationship between the capacity of laundry and the rotational force of the rotating vane and the amount of air supplied accordingly. FIG.

11 is an enlarged view of the nozzle and its peripheral portion.

12 is a block diagram showing a control unit of the washing machine.

FIG. 13 is a process diagram showing in stages the flow from the washing treatment step to the cleaning treatment step by introduction of air; FIG.

FIG. 14 is a graph showing the relationship between the rotational force of a rotary vane, the amount of air by an air pump, and the capacity of laundry in a conventional washing machine. FIG.

FIG. 15A is a cross-sectional schematic diagram showing a state in which a nozzle is interrupted and a foreign substance remains without being discharged from the outlet.

FIG. 15B is a schematic plan view of FIG. 15A. FIG.

16 is a sectional view of a washing machine of another embodiment.

17 is a partially enlarged cross-sectional view of the rotational transmission mechanism shown in FIG.

18 is a block diagram showing the dehydration operation control principle in another embodiment.

19 is a block diagram showing a control unit of a washing machine in another embodiment.

20 is a flowchart showing an example of dehydration operation in another embodiment.

21 is a graph showing the relationship between the rotational speed of the washing machine dehydration tank and the control time in another embodiment.

22 is a graph showing the relationship between the rotational speed of the washing machine dehydration tank and its control time in still another embodiment.

23 is a block diagram of a washing machine control unit in still another embodiment.

24 is a graph showing the relationship between the spin speed of the dehydration tank and the control time when the dehydration operation is actually performed by using a washing machine in another embodiment.

25 is a conceptual view for explaining a method of driving a dehydration tank in still another embodiment.

Fig. 26 is a block diagram for explaining control until the dehydration operation is stopped and the clutch switching mechanism is operated.

Fig. 27 is a block diagram showing dehydration operation control when the dewatering operation is resumed after the dewatering operation is stopped.

28 is a control block diagram for dehydration operation in still another embodiment.

29 is a circuit diagram of a rotation speed detecting means.

30 is a diagram showing voltage waveforms input from the reed switch to the rotation speed determination means.

FIG. 31 is a flowchart for explaining control when the dehydration operation is resumed after the dehydration operation is stopped.

32 is a plan view showing a schematic configuration of a clutch switching mechanism.

33 is a flowchart showing another form of dehydration operation control in still another embodiment.

34 is a cross-sectional view of a washing machine of another embodiment.

35 is an exploded perspective view of the washing machine shown in FIG.

36 is an exploded perspective view of the washing machine for explaining the shape of the reinforcing frame in FIG.

37 is a partially enlarged sectional view of the screw stop of the reinforcing frame shown in FIG. 36;

38 is an exploded perspective view of the washing machine showing another form of the reinforcing frame.

Fig. 39 is a partially enlarged cross sectional view showing a screw stop of a reinforcing frame and a top plate;

40 is a perspective view of the washing machine in the case of mounting the bubble generator.

41 is an enlarged cross-sectional view of the bubble generator mounting portion in FIG.

42 is a cross-sectional view showing a general configuration of a conventional washing machine.

43 is a cross-sectional view of a washing machine having a bubble cleaning function disclosed in Japanese Patent Publication No. 2-46233.

44 is a cross-sectional view showing another conventional example.

45 is a view showing an example of a conventional method for driving a dehydration tank.

FIG. 46 shows a state in which the rotational speed of the dehydration tank does not reach the maximum rotational speed due to the foam.

47 is a cross-sectional schematic view of another conventional example.

48 is a plan view showing an example of an operation panel.

49 is a sectional view of another conventional example.

50 is an exploded perspective view of the washing machine shown in FIG. 49;

51 is a schematic sectional view showing a method for manufacturing the upper portion of the outer housing;

52 is a schematic sectional view showing a method for manufacturing the lower portion of the outer housing;

* Explanation of symbols for main parts of the drawings

2: dehydration tank 3: water tank

4: rotary vane 10: discharge valve

12: nozzle 13,13a: air pump

14 outlet 15,36,37 through hole

21: outlet 30: air pipe

34: recess 104: motor

120: magnet 261: reinforcement frame

262: top plate 270: boss

278: rear panel 279: front panel

281: bubble generator 282: convex portion

283 buffer 284 dropping prevention means

The present invention relates to a washing machine, and more particularly, to a washing machine with a bubble cleaning function, a washing machine with a rotation control function of a dehydration tank, and an outer housing structure of the washing machine.

The general configuration and operation of the conventional washing machine will be described below with reference to FIG. 42 is a cross-sectional view showing a general configuration of a conventional washing machine. Referring to FIG. 42, a conventional washing machine includes a water tank 302 in an outer housing 301. The inner blade of the dewatering tank 303 is provided so that the rotating blade 305 can rotate. The dewatering shaft 309 is fixed to the dewatering tank 303, and the rotating blade shaft 307 is fixed to the rotating blade 305. The dehydration shaft 309 is provided on the outer circumference of the rotary blade shaft 307.

The rotary blade shaft 307 and the dehydration shaft 309 are provided with a switching mechanism part 306, and the rotation of the motor 304 installed in the outer bottom part of the water tank 302 by the role of the switching mechanism part 306 is carried out. It is selectively transmitted to the rotary blade shaft 307 and the dehydration shaft (309). The switching mechanism portion 306 operates by the roles of the clutch lever 317 and the solenoid 318. Rotation of the motor 304 is transmitted to the rotating blade shaft 307 and the dewatering shaft 309 by the belt transmission mechanism 314. The motor 304 is provided with the motor rotating shaft 304a. The belt transmission mechanism 314 stops the rotation of the drive side pulley 313 fixed to the motor rotation shaft 304a, the driven side pulley 308 fixed to the rotary blade shaft 307, and the drive side pulley 313. The belt 316 is transmitted to the ipsilateral pulley 318.

In the conventional washing machine having the above configuration, during washing, the rotation of the motor 304 is transmitted to the rotary blade shaft 307 by the action of the belt transmission mechanism 314 and the switching mechanism portion 306 to rotate the rotary blade shaft 307. Only rotates. Therefore, the washing process is performed. At the time of dehydration, rotation of the motor 304 is transmitted to the dehydration shaft 309 and the rotary blade shaft 307 so that the rotary blade shaft 307 and the dehydration shaft 309 are integrated to rotate at high speed. Thereby, dehydration process is performed.

In recent years, it has basically the above-described configuration, but bubbles are generated in the washing liquid during the washing process to promote the dissolution of the detergent into the washing water and the penetration of the washing liquid into the clothes, thereby improving the cleaning effect. Washing machine is attracting attention. The following describes with reference to the drawings of the invention disclosed in Japanese Patent Laid-Open No. 2-46233 as one conventional example of a washing machine having a bubble cleaning function.

43 is a sectional view of a washing machine having a bubble cleaning function disclosed in Japanese Patent Laid-Open No. 2-46233. The washing machine includes an outer housing 351, a water tank 352 embedded in the outer housing 351, a dehydration tank 353 installed in the water tank 352, and a rotation transmission mechanism unit provided at an outer bottom of the water tank 352. 359 and an air supply unit 360. The dehydrogenation 353 has a dehydration hole 354, and a rotary vane 355 is provided at an inner bottom thereof.

The rotation transmission mechanism part 359 is comprised by the motor 358, the belt 357, and the cut-off mechanism part 356. As shown in FIG. Thus, the rotary blade 355 and the dehydration tank 353 are rotated in the same manner as in the basic example. The air supply unit 360 is composed of an air pump unit 361, an air pipe 362, and an automatic time switch 363. The automatic time switch 363 is provided on the operation panel 365 provided in the upper part of the washing machine main body, and is connected to the air pump 361. The air pipe 362 is connected to the air discharge port 364 provided at the bottom of the air pump 361 and the water tank 352 to supply the air obtained from the air pump 361 into the water tank 352. A drain pipe 366 is provided at the bottom of the water tank 352.

In the washing machine having the above structure, by operating the automatic time switch 363 at the time of washing, the air pump 361 is operated only for a predetermined time to supply a certain amount of air. This air is supplied into the water tank 352 at the air discharge port 364 through the air pipe 362. The air supplied into the water tank 352 is supplied to the washing liquid in the water tank 352 and the dewatering tank 353 through a gap between the rotary vane 355 and the dewatering tank 353 or the dewatering hole 354. Thus, bubbles are generated in the washing liquid by the supplied air. Therefore, dissolution of the detergent into the washing water and penetration of the washing liquid into the clothes were promoted to improve the washing effect.

However, in the above conventional example, there is a problem described below. Since the air pipe 362 is connected to the bottom face of the water tank 352, it has a part provided in the position lower than the bottom face of the water tank 352. Thus, the washing liquid containing dirts such as fats, dusts, sands, seams, etc. remains in the portion even after washing, so that the dirt is easily deposited in the air pipe 362. Therefore, the supply of air into the water tank 352 is disturbed. In the above conventional example, air bubbles are generated in the washing liquid in a presoak step, and then, the normal washing treatment is performed. That is, in the washing process, the washing process is performed by the rotational force of the main rotary blade 355. Therefore, damage to cloth is particularly likely to occur in silk and wool garments.

Next, another conventional example will be described. Referring to FIG. 42, in a conventional washing machine, a driven side pulley 313 connected to a motor 304 and a driven side pulley 308 and a belt 316 which transmit rotation of the motor 304 to the dehydration tank 303. The rotation of the motor 304 is transmitted to the dehydration tank 303 by the belt transmission mechanism 314 which consists of). However, in the region where the power frequency is 50 Hz and the region where the frequency is 60 Hz, since the rotation speed of the motor 304 is different, when the washing machine having the same belt transmission mechanism 314 is used (hereinafter referred to as "same washing machine"), the dehydration tank 303 The number of revolutions will also depend on the power frequency.

Therefore, when the washing machine of the 60Hz specification is used in an area where the power frequency is 50 Hz, the rotation speed of the dehydration tank 303 becomes smaller than the rotation speed that should normally be obtained. Therefore, dehydration is not performed sufficiently. In addition, when a washing machine of 50 Hz specification is used in an area where the power source frequency is 60 Hz, the rotation speed of the dehydration tank 303 becomes larger than the rotation speed that should be normally obtained. Therefore, there is a problem that the vibration or noise increases and further shorten the life of the device.

Thus, in order to secure the number of revolutions of the dehydration tank 303, which is conventionally obtained for each power source frequency, the length is varied according to the diameters of the driving side pulley 313 and the driving side pulley 313 having different diameters. When the belt 316 was determined and prepared in the product, it was selected and assembled according to the power source frequency.

Therefore, when manufacturing a product used in an area having a different power frequency, the driving pulley 313 and the belt 316 had to be selected at the time of assembly. In addition, the display of nameplates and packaging materials displayed on the products differs depending on the power supply frequency, and there is a hassle to be divided according to the power supply frequency even at distribution stages.

Next, another conventional example will be described with reference to FIG. As shown in FIG. 44, this washing machine is provided with the water tank 402 in the outer housing 401, and the dehydration tank 403 is provided in the water tank 402. As shown in FIG. The rotary blade 405 is rotatably provided in the inner bottom of the dehydration tank 403. The water tank 402 is supported on the outer housing 401 by the support rod 404 in the suspended state, and the outer bottom part has the motor 407, the driven side pulley 408b, the drive side pulley 408a, and the switching mechanism part. 406 is provided.

A magnet 409a is provided on the lower surface of the driven pulley 408b, and a rotation speed sensor (lead switch) 409 is provided at a position spaced apart from the predetermined interval by the magnet 409a. The drain pipe 412 is connected to the bottom of the water tank 402. A top plate 410 is attached to the upper side of the outer housing 401, and a power switch, a start switch, and the like are attached to the top plate 410, and an electronic circuit for controlling processes such as washing, draining, and dehydration is incorporated. An operation panel 411 connected to one circuit board (not shown) is provided.

In the washing machine having the above configuration, when the dehydration process is performed, the rotation of the motor 407 is transmitted to the dehydration tank 403 by the action of the switching mechanism 406, and the dehydration tank 403 starts the rotation. 45 shows an example of rotation control of the conventional dehydration tank, in which the vertical axis represents the rotational speed (rpm) and the horizontal axis represents the time (seconds). Referring to FIG. 45, when the dehydration tank 403 which started the rotation is gradually accelerated and reaches the predetermined rotation speed S ₁ (for example, S ₁ = 300 rpm), the rotation speed sensor 409 detects the motor. The supply of electricity to 407 is stopped.

The dewatering tank 403 then rotates inertia. When the rotation speed sensor 409 detects that the rotation speed of the dehydration tank 403 is lower than the rotation speed S _{1 by a} predetermined rotation speed S ₂ (for example, S ₂ = 120 rpm), the electric power supply is started again to the motor 407. After the rotation / stop control of the dewatering tank 403 is repeated for a predetermined period (for example, 2-3 times), a driving method is immediately taken to raise the maximum rotation speed (for example, 800 rpm).

According to the dehydration driving method as described above, the following problems are remarkable when the washing machine has a large capacity (for example, when the capacity is 6 kg or more) during intermediate dehydration. The intermediate dehydration is a dehydration treatment performed after the washing treatment to the rinsing treatment, and whether or not the rinsing treatment can be effectively performed is determined by whether or not the intermediate dehydration is sufficiently performed. to be.

In the intermediate dehydration, in the case of a washing machine having a large capacity as described above, when the dewatering tank 403 is rotated at a rotational speed of, for example, about 300 rpm, the washing liquid in the laundry is dehydrated by the centrifugal force. ) Into the tank. At this time, when the water and bubbles are released at the same time and the volume of the laundry is large, or the rotation speed of the dehydration tank 403 is large, the amount of water and bubbles also increases.

Water is easily discharged through the drain pipe 412 but bubbles are likely to remain in the water tank 402. Thus, due to the bubbles, the rotation of the dehydration tank 403 may be constrained and the rotation speed of the dehydration tank 403 may not reach the maximum rotation speed. 46 shows the rotational speed (rpm) of the dewatering tank 403 and the control time (seconds) in the case where the capacity of the laundry to be washed and the amount of detergent are the same as those under normal use using a washing machine having a capacity of 7.5 kg Shows the relationship. As a result, as shown in FIG. 46, the dehydration tank 403 may rise only at a rotational speed of about 460 rpm with respect to the desired maximum rotational speed S (for example, 800 rpm) by the restriction of bubbles. Therefore, there arises a problem that rinsing performance is lowered without sufficient intermediate dehydration. In addition, the dehydration sound becomes relatively large when the rotation speed of S ₁ is increased from the rotation speed S ₁ to the maximum rotation speed S. Therefore, it was a cause of noise generation.

Next, another conventional example will be described with reference to FIG. 47 and FIG. 48. FIG. Referring to FIG. 47, the washing machine is provided with a water tank 451 in an outer housing (not shown), and a dewatering tank 452 is rotatably embedded in the water tank 451. At the bottom of the dewatering tank 452, a rotary vane 453 is rotatably provided. The dehydration shaft 454 is fixed to the lower surface of the dehydration tank 452, and a rotary blade shaft 455 fixed to the rotary blade 453 is provided inside the dehydration shaft 454. A driven side pulley 456 is fixed to a lower end of the rotary wing shaft 455, and a driven side pulley 456 is connected to a drive side pulley 459 attached to the motor 458 through a belt 457. have.

The dehydration shaft 454 and the rotary blade shaft 455 are provided with a switching mechanism 460 for selectively transmitting the driving force of the motor 458 to the rotary blade 453 or the rotary blade 453 and the dehydration tank 452. have. The washing step or the dehydration step is performed by the action of the switching mechanism 460. The switching mechanism 460 selectively transmits a brake for stopping rotation of the dehydration shaft 454 and a driving force of the motor 458 to the rotary blade shaft 455 or the rotary blade shaft 455 and the dehydration shaft 454. And a switching motor for driving the clutch. In another conventional example, a switching mechanism having a solenoid is used. However, when the switching mechanism unit 460 considers the noise at the time of switching, the use of the switching motor reduces the noise. On the premise that

A magnet 461 is attached to the upper surface of the driven pulley 456. The rotation speed sensor (lead switch) 462 is arrange | positioned by the attachment angle 463 in the position spaced apart from the magnet 461 at predetermined intervals. Therefore, the rotation speed of the driven pulley 456 is detected by the rotation speed sensor 462, and the rotation of the rotary vane 453 at the time of washing or the dehydration tank 452 at the time of dehydration is controlled.

The laundry is put into the dewatering tank 452 of the washing machine having the above structure, and the washing process is performed by rotating only the rotary vanes 453 under the action of the switching mechanism 460. In the dehydration process, the drain valve (not shown) installed at the bottom of the water tank is opened to drain the water, and the water level sensor (not shown) confirms the completion of the drainage. At this time, the drain valve and the clutch operate in conjunction. That is, when the drain valve is opened, the clutch operates in conjunction with the movement of the drain valve to be separated from the gear provided on the outer circumference of the dewatering shaft 454.

As a result, the motor 458 rotates, the rotary blade shaft 455 and the dewatering shaft 454 rotate integrally, and the dewatering tank 452 and the rotary blade 453 rotate. This causes the laundry to be centrifugally dehydrated. When the dehydration is stopped, the dehydration tank 452 is stopped by applying a brake after the power supply to the motor 458 is cut off. At this time, the clutch works in conjunction with the brake.

In the conventional washing machine as described above, when the dehydration operation is stopped by manual operation during the dehydration process by the automatic operation, or when the upper cover of the washing machine is opened for a predetermined angle or more, the safety device is operated to stop the dehydration operation. There is this. An upper surface plate (not shown) is provided on an upper portion of the outer housing of the washing machine, and an operation panel is provided on the upper surface plate as an operation unit of the washing machine. 48 shows an example of an operation panel in a conventional washing machine. As shown in Fig. 47, the operation panel is provided with start / pause buttons along with various operation buttons.

Therefore, when the start / pause button is accidentally pressed during the dehydration operation, the user may press the start / pause button again to resume operation immediately. In this case, since the brake is operated and the clutch enters, noise may be generated when the clutch enters in a state where the dehydration tank 452 is not completely stopped when the capacity of the laundry is large.

When the start / pause button is pressed again, power supply to the motor is resumed and at the same time, the clutch is operated by the operation of the switching motor, and the clutch is in a disconnected state. However, the switching motor has a mechanism in which one end of the wire is attached to the pulley attached to the switching motor and the other end is fixed to the clutch lever so that the pulley rotates to wind the wire around the pulley to swing the clutch lever. Therefore, some time is required when the clutch is shut off by moving the clutch lever. Therefore, when the timing at which the clutch is cut off and the timing at which power supply is resumed to the motor are simultaneously, there is a problem that the clutch is rubbing on the clutch gear and noise is generated because the movement of the clutch lever is slow. When the top cover is opened at a predetermined angle or more, the safety device operates to dehydrate the tank 452 in the same manner as when the start / pause button is pressed, and the dehydration operation is resumed by closing the top cover. Therefore, a problem occurs that noise is generated as mentioned above.

Next, another conventional example will be described with reference to FIGS. 49 to 52. FIG. In this washing machine, as shown in FIG. 49, the outer housing is composed of an upper portion 511 and a lower portion 512, and an upper plate 513 is attached to an upper portion of the upper portion of the outer housing 511. As shown in FIG. The water tank 507 is embedded in the outer housing in the state supported by the support rod 508, and the dewatering tank 501 is built in the water tank 507. In the dehydration tank 501, the rotary vane 502 is rotatably provided at the bottom.

The dehydration shaft 504 is fixed to the lower surface of the dehydration tank 501, and a rotary blade shaft (not shown) fixed to the rotary blade 502 is provided in the dehydration shaft 504. Therefore, only the rotor blade 502 rotates during washing by the action of the motor 503, the belt transmission mechanism 514, and the switching mechanism 506 installed on the outer bottom of the water tank 507, and the rotor blade 502 when dewatered. And the dehydration tank 501 is integrated and rotates.

In the above configuration, the outer housing is composed of an outer housing upper portion 511 and an outer housing lower portion 512. This is because the outer housing is molded of synthetic resin. In general, when the outer housing of the washing machine is molded with a synthetic resin, the height of the outer housing is 70 to 80 cm. Therefore, even if the synthetic resin is filled in a mold and molded integrally with the outer housing, the gloss of the molded product is uneven and the outer housing is not uniform. It was not possible to mold them integrally. Therefore, conventionally, the outer housing is divided up and down, molded separately, and assembled. In addition, in the above various conventional examples, the outer housing is not divided, but this is based on the outer housing made of metal.

In this case, it is necessary to provide a support portion 511b for supporting the water tank 507 at the upper end of the outer housing upper part 511 and a leg portion 512a at the lower end of the outer housing lower part 512. Therefore, as shown in FIG. 51, since the upper part 511 of the outer housing has the support part 511b, the mold M cannot be removed upwards but must be removed downwards. Therefore, the design of the molding die M is tapered to widen from the top to the bottom of the outer housing upper portion 511 by a gradient for demoulding.

Moreover, as shown in FIG. 52, since the lower part 512a is in the outer housing lower part 512, the metal mold | die M cannot be removed below but needs to be removed upward. Accordingly, the outer housing lower portion 512 has a taper that widens from the lower end to the upper end. The outer housing upper part 511 and the outer housing lower part 512 are attached via the coupling part 511a provided in the lower end of the outer housing upper part 511. In order to mold the coupling portion 511a, the coupling portion 511a should be formed to protrude outward from the wall surface of the upper portion of the outer housing 511 in consideration of the direction in which the mold M is pulled out.

In the above configuration, the lower end is wider than the upper end of the upper part of the outer housing 511, and the coupling part 511a is expanded, so that the installation space of the washing machine becomes larger. In this case, referring to FIG. 49, the water tank 507 is caught by the support rod 508 to the support part 511b of the outer housing 511. As shown in FIG. Therefore, the portion where the shaking of the water tank 507 is considered to be greatest at the time of dehydration is near the upper end of the upper part of the outer housing 511. This is because the water tank 507 oscillates around the support part by the support rod 508 provided in the vicinity of the water tank 507 bottom part.

That is, the space between the water tank 507 and the outer housing upper part 511 needs to be secured to some extent in the vicinity of the upper end of the upper part of the outer housing 511, but the vibration of the water tank 507 is prevented in the vicinity of the lower part of the water tank 507. The considered space may not be necessary as much as the upper end of the upper portion of the outer housing 511. However, in the above configuration, the space of this portion becomes the widest. In other words, it can be said that the installation space is increased by increasing the unnecessary space. For example, in the case of a washing machine with a large capacity of 6 kg or more, the water tank 507 should also use a large one. Therefore, the outer housing itself must also be large and the installation space problem becomes remarkable. For this reason, it is also considered that a commercially available pingsu pan cannot be used. Since the expansion of the coupling portion 511a looks like a band, the appearance is not very good.

Moreover, as shown in FIG. 50, the upper surface plate 513 in which the operation panel was provided is provided in the upper side of the outer housing 511. As shown in FIG. The top plate 513 is fixed to the side boss 514 and the rear boss 515 provided in the upper side of the outer housing 511 by screws 516 in the transverse direction and fixed. Therefore, the screw stop can be seen from the front, and the head of the screw 516 is not good appearance, so that a separate cap 517 is covered to improve the appearance. In this way, since a separate cap 517 is attached, the cost is high and much effort is required for quality control in production.

In addition, when the top plate 513 becomes larger than the outer housing due to dimensional error in production, when the top plate 513 is fastened to the side boss 514 with the screw 516, the front portion of the top plate 513 is removed from the front of the outer housing. Extrude Therefore, by tightening the screw 516 of the rear boss 515, the corner portion of the upper surface plate 513 protrudes outward, and the corner portion of the upper surface plate 513 and the upper side of the outer housing 511 becomes conspicuous. Therefore, the appearance may be remarkably damaged.

Moreover, when the bubble generator is provided, the problem that noise is generated can be considered as vibration of the bubble generator is transmitted to the washing machine. The bubble generator is assembled to the top plate 513 in advance and then assembled to the washing machine body together with the top plate 513. Therefore, when the position of the bubble generator is misaligned during the transfer between the assembly of the top plate 513 and the assembly of the washing machine main body, the noise may be generated when the top plate 513 and the bubble generator come into direct contact with each other. I can think of it. The position of this bubble generator is not found out until the vibration sound occurs in the energization test performed in the subsequent process. Therefore, in this inspection, it is understood that the position of the bubble generator is misaligned only when the vibration sound is generated in the upper plate 513. In this case, since the top plate 513 must be disassembled again and the position of the bubble generator is corrected, a problem that the inspection process becomes complicated is considered.

It is an object of the present invention to provide a washing machine which can perform bubble cleaning with little damage to fabric and without impairing cleaning power by supplying bubbles stably and effectively into a water tank.

Another object of the present invention is to provide a washing machine that can be used as the same belt transmission mechanism even in regions with different power frequencies.

Still another object of the present invention is to provide a washing machine that can effectively control intermediate dewatering and significantly reduce noise due to dehydration by controlling the rotation speed of the dewatering tank.

Still another object of the present invention is to provide a washing machine capable of resuming dehydration operation without generating noise even when the dehydration operation is stopped during the dehydration operation.

Still another object of the present invention is to provide a washing machine having a small installation space and a beautiful appearance.

Still another object of the present invention is to provide a washing machine that can effectively prevent noise generation by the bubble generator.

In order to achieve the above object, a washing machine based on the present invention provides a bubble generation in an area between a water tank, a dewatering tank disposed in the water tank and having a dewatering hole, a rotary vane installed at the bottom of the dewatering tank, and a bottom of the dewatering tank bottom and the bottom of the water tank. On the premise of a washing machine provided with an air supply means for supplying air for the rotary vane, a through hole for blowing air supplied from the air supply means into the dewatering tank is drilled.

According to the washing machine, since air is effectively supplied into the dehydration tank through the through hole installed in the rotary vane, effective bubble cleaning is possible.

In this invention, Preferably the through-hole of a rotary blade is provided in the center part of a rotary blade. The air supply means includes an air pump for supplying air, a nozzle disposed in an area between the dehydration tank bottom and the water tank bottom, and an air pie for supplying air from the air pump to the nozzle. And the nozzle is provided in the side wall of a tank, and is installed so that it may extend toward the center part of a tank along the bottom of a tank. Preferably, the air pump is a variable discharge amount air pump, and the discharge amount of the variable discharge amount air pump is changed in accordance with the capacity of the object to be washed.

Moreover, in order to achieve the said objective, the washing machine based on this invention is the rotation speed detection means for detecting the highest rotation speed of the dehydration tank obtained by the power source frequency of a use area, the actual rotation speed detected by the rotation speed detection means, A first comparing means for comparing the preset upper limit rotation speed, and a motor stopping means for stopping power supply to the motor according to the first comparing means if the rotation speed of the dehydration tank exceeds the upper limit set rotation speed; And second rotation means for comparing the actual rotation speed detected by the rotation speed detection means with the preset lower limit speed after the power supply to the motor is stopped, and the rotation speed of the dehydration tank by the second comparison means. And when it is determined that the speed is smaller than the set rotational speed of the motor, the motor starting means is provided to start electric power supply to the motor.

According to the washing machine, when the rotation speed of the dehydration tank exceeds the preset upper limit rotation speed, the power supply to the motor is stopped, and the dehydration tank then rotates inertia. Therefore, when the rotation speed of the dehydration tank rotating inertia becomes smaller than the rotation speed of a predetermined lower limit, electric power supply to a motor is started again. Therefore, when the washing machine of the same device configuration is used in a region where the power source frequency is different, it is possible to control the rotation speed of the dehydration tank within a desired storm.

In the present invention, preferably, the upper limit set rotational speed is 850 rpm, and the lower limit set rotational speed is 750 rpm. The motor is a condenser motor, and the motor actuating means includes: a minimum rotational speed discrimination means for discriminating that the rotational speed of the dewatering tank is less than a predetermined amount less than the lower limit, and the lowest rotational speed discrimination means discriminates the lowest rotational speed. It is further provided with a capacitor energizing means for starting the supply of electric power to the furnace. The minimum set rotational speed is preferably 700 rpm.

Further, in order to achieve the above object, the first rotation speed increasing means for raising the rotation speed of the dehydration tank from the stationary state to the first rotation speed region, and maintaining the rotation speed of the dehydration tank in the first rotation speed region for the first predetermined time. The first rotation speed holding means, the second rotation speed increasing means for raising the rotation speed of the dehydration tank to the second rotation speed region higher than the first rotation speed region as the first predetermined time elapses, and the rotation speed of the dehydration tank Second rotational speed holding means for holding in the second rotational speed region for two predetermined time periods, and third rotational speed for raising the rotational speed of the dewatering tank to a maximum rotational speed higher than the second rotational speed region as the second predetermined time elapses; A rising means.

According to the washing machine, the rotation speed of the dehydration tank is maintained for a first predetermined time in the first rotation speed region, which is a relatively low rotation speed. Therefore, water and bubbles released from the laundry by the centrifugal force by the rotation of the dehydration tank are also relatively small. Therefore, the amount of bubbles remaining in the water tank is also reduced, so that the rotational restraint of the dehydration tank due to the bubbles can be effectively prevented.

After the first predetermined time elapses, the rotation speed of the dehydration tank is increased to the second rotation speed region higher than the first rotation speed region. At this time, the amount of water and bubbles contained in the laundry is less than that of the initial stage of dehydration. Therefore, even if the dewatering tank is rotated in the second rotation speed region higher than the first rotation speed region, the amount of water and bubbles released from the laundry is not so large. Therefore, the amount of bubbles remaining in the water tank is also reduced, so that rotational restraint caused by bubbles in the dewatering tank can be effectively prevented. After maintaining the rotation speed of the second predetermined time dehydration tank in the second rotation speed range, the rotation speed of the dehydration tank is increased to the maximum rotation speed by the third rotation speed increasing means.

As described above, by increasing the rotational speed of the dewatering tank step by step from a relatively low rotational speed, it is possible to significantly reduce the amount of bubbles remaining in the water tank as compared with the prior art. Therefore, the rotation restraint of the dehydration tank by bubbles can be effectively prevented. In addition, by increasing the number of revolutions of the dehydration tank in stages, the time for dehydration tank acceleration is dispersed. Therefore, noise such as dehydration sound can be significantly reduced.

In the present invention, the first rotational speed region is preferably 1/5 to 1/4 the maximum rotational speed, and the second rotational speed region is the size of 2/5 to 1/2 the highest rotational speed. The difference between the first rotational speed region and the second rotational speed region is 1/7 to 1/6 of the highest rotational speed. The first predetermined time is 90 to 120 seconds, and the second predetermined time is 1/3 to 1/2 the size of the first predetermined time. Moreover, two or more rotation speed ranges may exist.

Further, in order to achieve the above object, a washing machine based on the present invention is connected to or released from a rotating blade driven by a motor, a dehydrating tank connected to a rotating blade by a clutch, and a rotating blade and a dewatering tank by operating a clutch. It is assumed that a clutch switching mechanism is set to a state. The washing machine includes a dehydration mode release command output means for giving off a dehydration mode release command, a motor energization control means for stopping electric power supply to the motor in response to the dehydration mode release command by the dehydration mode release command output means, and dehydration. Rotation speed determination means for detecting that the rotation speed of the tank is less than or equal to the predetermined value, and clutch switching mechanism operation means for operating the clutch switching mechanism when the rotation speed of the dehydration tank is determined to be less than or equal to the predetermined value according to the rotation speed determination state. do.

According to the washing machine, when the dehydration operation is interrupted, for example, by pressing the start / pause button during the dehydration operation, that is, when the release command of the dehydration mode is issued, power supply to the motor is first stopped by the motor energization control means. . Then, the rotation speed of a dehydration tank is gradually reduced and it is judged by the rotation speed determination means whether the rotation speed of a dehydration tank became below a predetermined value. The clutch switching mechanism is operated by the clutch switching mechanism operating means when it is determined by the rotation speed determining means that the rotation speed of the dewatering tank is equal to or less than the predetermined value. In this way, since the clutch switching mechanism does not operate until the rotation speed of the dewatering tank becomes less than or equal to a predetermined value, it is possible to effectively prevent noise that may occur due to the clutch entering the high speed rotation of the dewatering tank.

On the other hand, in order to prevent noise that may occur when the dehydration operation is resumed after the dehydration operation is stopped, the washing machine has the following configuration. The washing machine switches the clutch for moving the clutch and connecting the rotary blade and the dehydrating tank by moving the clutch according to the dehydration mode start command output means for generating the dehydration mode start command and the dehydration mode start command output by the dehydration mode start command output means. Mechanism control means and motor energization start means for supplying electric power to the motor after the rotary blade and the dehydration tank are connected.

According to the washing machine, after the dehydration mode command is output, the clutch is first moved by the clutch switching mechanism control means so that the rotary blade and the dehydration tank are connected. In this case, the clutch is in a blocked state, in contrast to the above case. And since the power supply to the motor is performed after the rotary blade and the dehydrating tank is in a connected state, it is possible to effectively prevent noise that may be caused by friction with the clutch gear when the clutch moves.

Moreover, in order to achieve the said objective, the washing machine based on this invention is equipped with the water tank, the reinforcement frame which supports a water tank, and the outer housing assembly made from synthetic resin as a whole. And the outer housing assembly of the washing machine is composed of the upper and lower outer housing divided up and down. In the outer housing upper part, the area of the upper end opening is set larger than the area of the lower end opening, and in the outer housing lower part, the area of the upper opening is set larger than the area of the lower end. And the engagement means for engaging and supporting the upper end of the outer housing is formed in the lower inner wall of the upper upper housing.

By taking the above configuration, the outer wall surface of the washing machine is inclined at a predetermined angle with respect to the vertical direction from the top to the bottom of the washing machine. That is, the area of the bottom of the washing machine can be reduced. Therefore, the installation space can be made small. Since the engagement means between the upper part of an outer housing and the lower part of an outer housing is provided in the inner wall of an upper part of an outer housing, the outer wall surface of an outer housing upper part and a lower part is almost one side in a fitting part. Thus, the appearance of the washing machine is also improved.

Moreover, when the bubble generating apparatus is provided in order to perform bubble washing | cleaning, the box-shaped top plate assembly which provided the operation panel in the upper side of the reinforcement frame is attached. The top plate assembly is composed of a top plate arranged on an upper surface of the reinforcing frame, a rear top cover, a front top cover, a rear panel and a front panel which are combined on the top plate. Thus, the bubble generator is built directly under the rear panel or the front panel. A bubble generator mounting portion of the top plate is formed with a convex portion for mounting the bubble generator spaced apart from the reinforcement frame, and a buffer for absorbing vibration and noise of the bubble generator is provided between the convex portion and the bubble generator. have.

According to the washing machine having the above configuration, a convex portion for mounting the bubble generating device spaced apart from the reinforcing frame is formed, and a buffer is installed between the convex portion and the bubble generating device, and the bubble generating device is transferred from the bubble generating device to the reinforcing frame. Vibration can be significantly reduced.

In the present invention, the outer wall surface of the outer housing assembly is preferably inclined within an angle range of 0.8 degrees to 3.0 degrees with respect to the vertical direction. On the upper inner wall of the rear panel or the front panel, dropping prevention means for preventing the falling off from the convex portion of the bubble generator is provided.

Embodiments of the present invention will be described below with reference to the drawings.

1 is a cross-sectional view showing an embodiment based on the present invention. As shown in FIG. 1, the water tank 3 is supported by the support rod 7 in the outer housing 1, and the dehydration tank 2 is built in the water tank 3. As shown in FIG. The rotary blade 4 is attached to the inner bottom part of the dehydration tank 2. The opening 36 is provided in the side wall of the recessed part provided in the center part of the rotary vane 4, and the cap 35 is fitted in this recessed part. The dehydration shaft 17 is fixed to the bottom of the dehydration tank 2 via the assembling flange 18.

And inside the dehydration shaft 17, the rotary blade shaft 19 is provided. The rotary blade 4 is fixed to the upper part of the rotary blade shaft 19 with a screw. The rotary blade shaft 19 and the dewatering shaft 17 are driven to rotate by the action of the rotation transmission mechanism 6 provided at the outer bottom of the water tank 3, whereby the rotary blade 4 and the dewatering tank 2 are driven. Rotate to drive. The drainage path 9 is provided in the bottom part of the water tank 3. The drain path 9 includes a drain port 20, a drain pipe 21, a drain valve 10, and a drain hose 22.

The air supply hole 11 is formed in the lower part of the side wall of the water tank 3. The nozzle 12 is attached to the air supply hole 11, and the air pump 13 is connected to the nozzle 12 via the air pipe 30. The air pump 13 is arranged in the top plate 8 provided on the upper side of the outer housing 1. The drive circuit 31 is provided in the upper surface plate 8, and this drive circuit 31 is connected to the air pump 13. And the drive circuit 31 operates the air pump 13 according to the rotation of the rotary vane 4.

Next, the rotary blade 4 will be described in more detail with reference to FIGS. 2A, 2B, 3A, and 3B. FIG. 2A is a plan view of the rotary vane 4, and FIG. 2B is a sectional view of the rotary vane 4. FIG. 3A is a plan view of the cap 35 fitted in the central portion of the rotary vane 4, and FIG. 3B is a sectional view of the cap 35. As shown in FIG. 2A, a concave portion 34 into which the cap 35 is fitted is provided at the center portion of the rotary vane 4. A plurality of openings 36 are provided on the side wall of the recess 34 at predetermined intervals. A plurality of through holes 37 are provided at positions spaced apart from the recesses 34 by a predetermined distance.

Next, referring to FIG. 2B, the annular rib 32a is provided on the rear surface of the rotary blade 4. The through hole 37 is provided in an area partitioned by the annular rib 32a. In the rotary blade 4, the center part in which the recessed part 34 is provided is the highest.

As shown in FIG. 3A, a bubble through hole 15 is provided on the surface of the cap 35 fitted in the recess 34. In this case, a plurality of bubble through holes 15 are provided on a concentric circle centered on the center of the cap 35 at predetermined intervals, but the arrangement state of the bubble through holes 15 is not limited to the above. Next, referring to FIG. 3B, a fixing portion 35a for fixing the cap 35 to the recessed portion 34 is provided at a predetermined position on the side of the cap 35.

Next, based on FIG. 4 and FIG. 5, the structure of the washing machine nozzle 12 mounting part vicinity in this embodiment is demonstrated in detail. 4 is a partially enlarged cross-sectional view of the vicinity of the nozzle 12, and FIG. 5 is an enlarged cross-sectional view of the vicinity of the discharge port 14 of the nozzle 12 in FIG. As shown in FIG. 4, the air gap hole 11 is formed in the position lower than the bottom face of the dehydration tank 2 in the side surface of the water tank 3. As shown in FIG. In the air supply hole 11, a cylindrical flange 25 protrudes from the outer surface of the water tank 3. In the air supply hole 11, a joint 26 is fitted with a zero ring so as to communicate the inside and the outside of the water tank 3.

The joint 26 is composed of a pipe portion 27 having a diameter smaller than the inner diameter of the air supply hole 11 and an assembly member 28 for fitting to the flange portion 25 of the air supply hole 11. The assembly member 28 is provided on the outer periphery of the pipe part 27. And the joint 26 is inserted into the air supply hole 11 from the outer side of the water tank 3, and is attached by the adhesive agent and the 0 ring. One end positioned outside the water tank 3 of the joint 26 is connected to the air pipe 30, and a nozzle 12 is provided at an end of the joint 26 that is placed inside the water tank 3. have. The nozzle 12 is a substantially straight pipe with the same inner diameter. The discharge port 14 of the nozzle 12 is arranged below the assembly flange 18 of the dewatering tank 2. The nozzle 12 is fixed to the bottom of the water tank 3 with a screw 29.

Next, referring to FIG. 5, the rotary blade 4 is comprised from the wing part 32 which has the annular rib 32a, and the right cylinder part 33 arrange | positioned in the center of the wing part 32. As shown in FIG. The cylindrical portion 33 is fixed to the rotary blade shaft 19 with a screw. The recessed part 34 is provided above the cylindrical part 33, and the recessed part 34 has the cap 35 covered. Therefore, the center part is the highest in the rotary blade 4. The cap 35 is provided with a plurality of bubble through holes 15. An opening 36 is formed between the wing portion 32 and the cylindrical portion 33, that is, on the side wall of the concave portion 34. The wing part 32 is provided with the some through hole 37 located in the annular rib 32a. The assembly flange 18 is provided with a plurality of large holes 38 for bubble penetration. The discharge port 14 of the nozzle 12 is arranged near the lower portion of the large hole 38.

In the washing machine having the above configuration, when washing is started, constant water is supplied according to the capacity of the laundry to be washed in the water tank 3. Thereafter, the rotor blade 4 is rotated for a predetermined time (about 30 seconds) to precipitate the laundry to float on the water surface. However, the strength of the water flow is not enough to cause damage to the fabric. And the air pump 13 is operated by the drive circuit 31, and the air discharged from the air pump 13 is supplied into the water tank 3 through the air pipe 30 and the nozzle 12. As shown in FIG. Air supplied in this way is annular rib 32a and wing part 32 through the big hole 38 for bubble passage provided near upper direction of the discharge port 14 of the nozzle 12 as shown by the arrow in FIG. ) And the area surrounded by the cylindrical portion 33. Thus, a part of the air is supplied into the dehydration tank 2 through the through hole 37 provided in the wing 32, and the rest 34 is provided in the central portion of the rotary wing 4 through the opening 36. Is sent). The recess 34 is then sent into the dewatering tank 2 through the bubble through hole 15 of the fitted cap 35.

Thus, since the bubble is supplied in the dehydration tank 2 in the center part of the rotary blade 4, ie, the center part of the bottom part of the dehydration tank 2, the supplied bubble becomes easy to adhere to a laundry object. In order to prevent the bubble from being folded only in the same place as the object to be washed, the rotating blade 4 is frequently rotated at regular intervals so that the object is moved to the bubble to every corner of the laundry. Therefore, bubbles can be efficiently adhered to the laundry to be washed in every corner, so as to promote the surfactant action of the detergent. In addition, since the air bubbles are effectively supplied to the laundry to be machined, the mechanical washing by the rotary knurl 4 greatly reduces the mechanical washing of laundry products such as silk products and wool products which are easily scratched, and the cleaning is efficiently performed. It becomes possible to do it. Therefore, washing can be performed effectively without damaging the fabric.

Next, another form of the nozzle 12 will be described with reference to FIG. 6. 6 is a cross-sectional view showing that the shape of the nozzle 12 is different. In this embodiment, the nozzle 12 is a substantially straight pipe having the same inner diameter. However, as shown in FIG. 6, the shape of the nozzle 12 may be a taper shape where the discharge aperture B of the nozzle 12 is smaller than the nozzle inner diameter A. In FIG.

Since the nozzle 12 has a tapered shape as described above, if the pressure of the air sent from the air pump 12 is constant, the flow rate of the air discharged from the discharge port 14 is faster than the flow rate of the nozzle 12. do. Therefore, compared with the nozzle 12 of the straight line shape as mentioned above, air can be discharged | emitted in the water tank 3 strongly. As a result, the bubble can be made smaller and bubbles can be attached to the laundry more effectively. Therefore, the action of the surfactant can be made more active, and more effective cleaning can be achieved.

Next, another form of the air supply means will be described with reference to FIG. 7 is a partial enlarged cross-sectional view of the vicinity of the drainage path 9 provided at the bottom of the water tank 3. As shown in FIG. 7, the air supply means in this case is comprised from the air pump 13, the supply hose 42, and the nozzle port 41. As shown in FIG. The nozzle port 41 is provided in an upstream layer rather than the drain valve in the drain path 9, and the air pump 13 is connected by fitting the supply hose 42 to the nozzle port 41. As shown in FIG. In this case, the nozzle port 41 opens upward at the L-shaped bent portion of the drain pipe 21 in the drain path 9.

On the other hand, the drainage path 9 is unsanitary because dirt, such as fat, dust, sand, seams, etc., from the laundry is adhered to the inner wall, and if such dirt adheres to the drain valve 10, it may cause drainage failure. do. However, as described above, the nozzle port 41 is provided in the drainage path 9, and the air sent from the air pump 13 is ejected from the nozzle port 41 to generate bubbles. The dirt or scale attached to the inner wall of the drainage path 9 can be eliminated. In this case, bubbles rise and are sent to the water tank 3 and supplied to the dewatering tank 2 via the same path as described above. And it is attached to the laundry to increase the cleaning effect of the detergent. On the other hand, dirt and the like settle in the drainage path and are discharged when the drain valve 10 is opened. Therefore, the contamination in the drainage path 9 is cleaned, and it is possible to prevent the harmful effects such as poor drainage.

Next, the case where a variable discharge amount air pump is provided as an air pump is demonstrated. First, the necessity of the variable discharge air pump will be described with reference to FIG. FIG. 14 shows the relationship between the arc power of the rotary vane 4, the air supply amount by the air pump 13, and the capacity of the laundry. Here, the rotational force of the rotary blade 4 is demonstrated. By changing the power supply time to the motor 5, the time that the rotary blade 4 rotates is changed. When the power supply time is long, the rotation of the rotary vanes 4 may cause a strong water flow in the washing liquid in the dehydration tank (2). In this case, the rotational force is expressed as large.

Conventionally, since the rotational force of the rotary blade 4 was changed according to the capacity of the laundry, the following description is made on the assumption of this. When the rotational force of the rotary blade 4 changes as shown in FIG. 14, but the air supply amount of the air pump 13 is constant, the following problem is considered. When the capacity of the laundry is small, the capacity of the laundry is small, so that the amount of bubbles remaining in the washing liquid by adhering to the laundry also becomes small. Therefore, the washing | cleaning effect by a bubble falls. In addition, since the residual amount of bubbles in the washing liquid is the washing mainly based on the rotational force of the rotary blade 4, the damage to the fabric is increased. If the capacity of the laundry is large, the capacity of the laundry is large, so that the amount of bubbles remaining in the washing liquid due to adhesion to it increases. However, it is also considered that the washing water level is also high and bubbles are overflowing from the dewatering tank 3.

In consideration of the above problems, the following description will be given in which the air supply amount by the air pump is relatively increased when the capacity of the laundry is small, and the air supply amount by the air pump is relatively low when the capacity of the laundry is large. A variable discharge amount air pump was used.

Hereinafter, a washing machine provided with a variable discharge amount air pump will be described with reference to FIG. 8 is a cross-sectional view showing an example of a washing machine equipped with a variable discharge air pump. As shown in FIG. 8, the configuration is almost the same as that of the washing machine shown in FIG. 1, but the variable discharge amount air pump 13a is provided on the upper plate 8, and the discharge amount of the variable discharge amount air pump 13a is adjusted. In order to control, the control circuit 31a is connected to the variable discharge amount air pump 13a. The motor 5 is provided on the outer bottom of the water tank 3, and the rotation transmission mechanism part 6 which cuts the rotation of the motor 5 to the rotary blade 4 and the dehydration tank 2 is provided. The rotation transmission mechanism part 6 includes a drive side pulley 6a fixed to the motor 5, a drive side pulley 6a fixed through a rotary blade 4 and a rotary blade shaft (not shown), and a drive side. It consists of the belt 6b for transmitting rotation of the pulley 6a to the driven side pulley 6c, and the drive switching part 6d.

The magnet 43 is attached to the lower surface of the driven pulley 6c. The reed switch 44 is provided in the position spaced apart from the magnet 43 at predetermined intervals. The reed switch 44 detects the number of revolutions of the rotary vanes 44, whereby the capacity of the laundry is detected. Next, with reference to FIG. 9 and FIG. 10, the air supply amount control method at the time of using the variable discharge amount air pump 13a is demonstrated in more detail. 9 is a block diagram for controlling the rotational force and the supply amount of the rotary blade 4. First, an example of the laundry capacity detection method using the reed switch 44 is demonstrated. For example, in order to detect the capacity of the laundry at the beginning of washing, a capacity detection means or the like is built in during the operation program in advance. Therefore, the rotation of the rotary blade 4 is controlled according to the capacity detection chart. The rotation speed of the rotary blade 4 changes with the capacity of the laundry, and the capacity of the laundry is detected by detecting the rotation speed of the rotary blade 4.

The rotary blade 4 is connected with the driven pulley 6c via the drive switching part 6d. Therefore, the rotation speed of the rotary blade 4 is detected by detecting the rotation speed of the driven side pulley 6c. The rotation speed of the driven pulley 6c is detected by the reed switch 44. The reed switch 44 corresponds to the sensor 44 in FIG. With reference to FIG. 9, the electric power supply time to the motor 5 is controlled by the motor control means 45 based on the detected rotation speed as described above, and at the same time the variable discharge amount air pump control means 46 controls the variable discharge amount air. The discharge amount of the pump 13a is controlled. Therefore, the bubble cleaning is effectively performed with the appropriate rotational force of the rotary vane 4 and the appropriate air supply amount in accordance with the detected capacity.

Next, an example of the control method will be described with reference to FIG. 10 shows the relationship between the capacity of the laundry and the rotational force of the rotary vane 4 and the air supply amount that change accordingly. As shown in FIG. 10, when the capacity of the laundry is small, the rotational force of the rotary vanes 4 is reduced and the air supply amount is increased. In this case, in order to reduce the rotational force of the rotary blade 4, the power supply time to the motor 5 is shortened. In order to increase the air supply amount, the variable discharge amount air pump 13a is controlled to increase the discharge amount per unit time of the variable discharge amount air pump 13a.

When the capacity of the laundry is large, the rotational force of the rotary vanes 4 is made large and the air supply amount is relatively small. Therefore, when the capacity of the laundry is large, the amount of air generated is made small by reducing the air supply amount, thereby preventing the bubble from overflowing in the water tank 3. When the capacity of the laundry is small, the amount of air generated in the laundry liquid increases because the amount of air supplied is increased. Therefore, the bubble adhesion amount to a to-be-washed object also increases, and the washing | cleaning effect by a bubble can also be heightened. That is, even when the capacity of the laundry is large or small, it is possible to adjust the rotational force and the air supply amount of the rotary blade 4 appropriately so that the bubble cleaning can be performed effectively without damaging the fabric and degrading the cleaning power.

In FIG. 10, the rotational force and the air supply amount of the rotary vanes 4 are continuously changed in accordance with the capacity of the laundry, but may be changed stepwise. The detected capacitance is transmitted to each of the motor control means 45 and the variable discharge amount air pump control means 46, but may be transmitted to one side and the other may be controlled accordingly. In addition, capacity determination may be made by providing a capacity setting switch or the like in advance and operating the user.

Next, the problem considered in the case of having the nozzle 12 in the water tank 3 as described above will be described using Figs. 15A and 15B. FIG. 15A is a cross-sectional view showing the shape in which the foreign material 47 remains without being discharged from the drain hole 20 because the nozzle 12 attached to the water tank 3 becomes an obstacle. In addition, in FIG. 15A, the nozzle 12 and the drain pipe 21 are shown on the same cross section for convenience. FIG. 15B is a schematic plan view showing a state in which the nozzle 12 becomes an obstacle and the foreign matter 47 remains without being discharged. Here, it refers to a solid substance present in the foreign matter or the washing liquid and penetrating the dehydration hole 29 installed in the dehydration tank 2 and exiting into the water tank 3.

Referring to these drawings, when the size of the foreign matter 47 penetrating through the dehydration hole 29 into the water tank 3 is greater than the distance between the outer peripheral bottom surface of the nozzle 12 and the bottom surface of the water tank 3, the foreign material 47 ) Remains in the water tank 3 in a state of being caught by the nozzle 12. Thus, such foreign matter 47 is deposited, the drainage capacity is reduced. In addition, when the deposition amount of the foreign matter 47 increases, it is possible that the foreign matter 47 and the bottom surface of the dehydration tank 2 come into contact with each other to generate noise or to restrict the rotation of the dehydration tank 2.

A method for avoiding the above problems will be described with reference to FIG. FIG. 11 is an enlarged cross-sectional view of the nozzle 12 and its peripheral portion, corresponding to FIG. 15A. As shown in FIG. 11, the distance H between the outer peripheral bottom face of the nozzle 12 and the bottom face of the water tank 3 is set larger than the hole diameter of the dehydration hole 29. As shown in FIG. Therefore, the foreign matter 47 coming out through the dehydration hole 29 is obstructed by the nozzle 12 and is discharged through the outlet 20 and the drain pipe 21 without being collected at the bottom of the water tank 13. In this case, the distance H represents the minimum distance between the outer peripheral bottom face of the nozzle 12 and the bottom face of the water tank 3.

In the ordinary washing machine, the hole diameter of the dewatering hole 2a is about 6 to 7 mm, so the distance may be a value larger than that, that is, a value larger than 7 mm in this case. In addition, in FIG. 11, the shape of the nozzle 12 may be a substantially straight line or a taper shape as mentioned above.

Next, another problem considered by the provision of the nozzle 12 and the air pipe 30 and the means for solving the problem will be described with reference to FIGS. 12 and 13. First, by providing the nozzle 12, dirt accumulation in the air pipe 36 which is a problem in the conventional example is remarkably reduced. However, even when the nozzle 12 is provided, the washing liquid penetrates into the air pipe 30 and the air nozzle 12 at the time of washing. Therefore, in the air pipe 30 and the nozzle 12, a scale, a detergent residue, etc. can attach gradually. In this case as well, there is a significant difference from the conventional example, but when it is used for a long time, the air pipe 30 or the nozzle 12 may be closed to generate power in a situation where no air is supplied into the water tank 3.

Therefore, in order to avoid the above problem, such a washing machine is provided with a washing process execution means by introducing air. Here, the air introduction path means a path for introducing air from the air pump 13 into the water tank 3. Therefore, the air introduction path in this case is composed of the air pipe 30 and the nozzle 12. The washing treatment step will be described by introducing air. This can be accomplished by carrying out the treatment in the same manner as in the normal rinsing process. When the rinsing step is executed, water is supplied into the dehydration tank 2. At this time, water enters the same level as the water level in the dehydration tank 2 in the air introduction furnace. Thus, by carrying out the same treatment as in the normal rinsing step, the water in the air introduction furnace is shaken up and down, thus cleaning the inside of the air introduction furnace. At this time, since the water entering the air introduction furnace is closer to the clear water, it is better to allow this process to be performed after the normal rinsing process.

Hereinafter, a washing machine provided with an air introduction passage cleaning means will be described in more detail with reference to FIGS. 12 and 13. Since the structure of the washing machine is almost the same as that shown in FIG. 8, the description of the structure is omitted. FIG. 12 is a block diagram showing a control unit of the washing machine, and FIG. 13 is a process diagram showing the flow from the washing process to the washing and rinsing process step by step with introduction of air.

First, the control part of the washing machine shown in FIG. 12 is demonstrated. The control unit is composed of a control circuit 31a, an external input unit 60, and an external output unit 61. Thus, the signal detected by the external input unit 60 is input to the control circuit 31a, and the control circuit 31a controls the operation of the external output unit 61 based on the signal.

The control circuit 31a includes an electronic timer 62, an arithmetic processing unit 63, a time control circuit 64, a memory 65 which stores control procedures of various washing processes, and an input buffer control circuit ( 66 and an output buffer control circuit 67.

The external input unit 60 includes a power switch 68 for supplying power to the entire apparatus, a cover switch 69 interlocking with the cover opening and closing, and a water level switch 70 for detecting the water level supplied to the dehydration tank 2. And a program switch 71 and a rotation speed detection switch 72 for selecting the combination contents of the washing step. Thus, the signal from each switch is input to the input buffer control circuit 66 of the control circuit 31a. The external output portion 61 includes a drain valve 73 which opens and closes when washing water is drained or drained in the dehydration tank 2, a water supply valve 74 which opens and closes when water is supplied, a motor 5, It consists of an alarm 75. In the external output unit 61, the power supply is controlled by the output buffer control circuit 67 of the control circuit 31a.

The control unit is provided in the upper surface plate 8 and controls the washing and rinsing process by introduction of air in the washing process. Next, the flow from the start of the washing process to the washing and rinsing process by the introduction of air will be described with reference to FIG. First, laundry and detergent are put in the dehydration tank 2, and then the washing process is started (step S ₁ ). Therefore, water is supplied from the water supply valve 74 into the dehydration tank 2 (step S ₂ ). Then, when the water level switch 70 detects that the water supplied in the dewatering tank 2 has reached a certain level, the water supply valve 74 is closed (step S ₃ ).

And an output buffer via the control circuit 67, power is supplied to the motor 5 is subjected to washing by rotation of the rotary blades (4) (step S _4). After the washing process starts, the end of the washing process time is detected by the operation of the time control circuit 64 and the electronic timer 62 (step S ₅ ). As the end of the washing process time is detected, the drain valve 73 is opened and drainage is performed (step S ₆ ). After that the water supply is carried out (step S ₇₎ again. Thus, the water level of the water supplied is detected by the water level switch 70 (step S ₈ ). Then, according to the detection result, the supply of water is stopped and rinsing is performed (step S ₉ ).

The end of the rinse time is detected by the operation of the time control circuit 64 and the electronic timer 62 (step S ₁₀ ). Thereafter, the drain valve 73 is opened and drained (step S ₁₁ ). After the drainage, the water level switch 70 detects whether there is water in the dewatering tank 2 (step S ₁₂ ). Thereafter, dehydration is performed (S ₁₃ ). The end of the dehydration time is detected by the operation of the time control circuit 64 and the electronic timer 62 (step S ₁₄ ). After that, power is again supplied to the water supply valve 74 to open the water supply valve 74 to perform water supply (step S ₁₅ ). And detects a predetermined water level in operation of the water level switch 70 (step S _16). Thereafter, the cleaning rinsing process is performed by introducing air for cleaning of the introduction furnace by air (step S ₁₇ ).

Therefore, it is possible to clean the inside of the air pipe 30 and the nozzle 12 with fairly clear water. In addition, when the cleaning rinsing process is incorporated by introducing air during the operation program, the air pipe 30 and the nozzle 12 can be cleaned at the time of the washing process. In the above example, the cleaning rinsing treatment is performed after dehydration by introducing air, but may be performed after the rinsing treatment.

Next, another embodiment will be described with reference to FIGS. 16 to 20. FIG. 16 shows a cross-sectional view of the washing machine in this embodiment. As shown in FIG. 16, this washing machine is composed of an outer housing 101, a water tank 102, a dehydration tank 103, and a rotation transmission mechanism portion 131. As shown in FIG. The outer housing 101 includes a water tank 102, a dehydration tank 103, and a rotation transmission mechanism unit 131 therein. The water tank 102 has a dehydration tank 103 therein, and serves to support the dehydration tank 103. The dehydration tank 103 is equipped with the rotary blade 105 in the inner bottom part, and the dehydration shaft 109 is being fixed to the bottom face. The rotation transmission mechanism part 131 is provided in the outer bottom part of the water tank 102.

Next, with reference to FIG. 17, the rotation transmission mechanism part 131 is demonstrated in more detail. As shown in FIG. 17, the rotation transmission mechanism part 131 is comprised by the motor 104, the belt transmission mechanism 114, and the clutch mechanism part 106. As shown in FIG. The motor 104 is provided in the outer bottom part of the water tank 102, and is provided with the motor rotating shaft 112. As shown in FIG. The belt transmission mechanism 114 is composed of a drive side pulley 113, a V belt 116, and a driven side pulley 108. The drive side pulley 113 is comprised by the pulley member 113a, the cooling fan 113b, and the screw 113c, and is being fixed to the motor rotating shaft 112. As shown in FIG. Therefore, the drive pulley 113 rotates integrally with the motor rotation shaft 112.

The driven side pulley 108 is connected to the drive side pulley 113 via the V belt 116, and the magnet 120 is attached to the lower surface. In addition, the driven pulley 108 is fixed to the rotary blade shaft 107. The reed switch 119 is fixed by the angle 119a at the position which opposes the magnet 120 attached to the lower surface of the driven side pulley 108 at predetermined intervals. Then, the rotation of the drive pulley 108 is detected by the reed switch 119.

The clutch mechanism 106 includes a rotary blade shaft 107, a dehydration shaft 109 provided on the outer circumference of the rotary blade 107, a spring clutch 110, a solenoid 118, and a clutch lever 117. Consists of. The spring clutch 110 is provided on the outer circumferential surface of the dehydration shaft 109, and selectively transmits the rotation of the driven pulley 108 to the rotary blade shaft 107 and the dehydration shaft 109. The solenoid 118 is attached to the outer bottom of the water tank 102 and is connected to the spring clutch 110 via the clutch lever 117. The washing machine is not shown for convenience in embedding a microcomputer as the center of control. In addition, the drive pulley 113 and the V belt 116 are used for the case where the power source frequency is 50 Hz.

Next, the operation during the dehydration operation of the washing machine having the above structure will be described. When the dehydration operation is started, the clutch lever 117 is actuated by the solenoid 118 to switch the spring clutch 110 into a form in which power is transmitted to the dehydration side 109. By supplying electric power to the motor 104 in this state, the drive side pulley 113 fixed to the motor rotating shaft 112 rotates. The rotation of this drive side pulley 113 is transmitted to the driven side pulley 108 via the V belt 116. As the driven pulley 108 rotates, the rotary blade shaft 107 and the dewatering shaft 109 fixed to the driven pulley 108 rotate. Therefore, the dehydration tank 103 fixed to the dehydration shaft 109 rotates.

Hereinafter, with reference to FIG. 18, the control principle of dehydration operation in a present Example is demonstrated. 18 is a block diagram showing the control principle of dehydration operation in this embodiment. First, when the dehydration operation is started, the spring clutch 110 is switched as described above, and then electric power is supplied to the motor 104. Therefore, the dehydration tank 103 rotates. And the rotation speed of the rotating dehydration tank 103 is detected by rotation speed detection means 119a. In this case, the rotation speed detection means 119a is the reed switch 119. Thereafter, the actual rotational speed of the dehydration tank 103 detected by the rotational speed detection means 119a by the first comparison means 121a is compared with the rotational speed set in advance during the operation program. Therefore, when the rotation speed of the dehydration tank 103 exceeds the rotation speed of an upper limit, the electric power supply to the motor 104 is stopped by the action of the motor stop means 121b.

After the power supply to the motor 104 is stopped, the dehydration tank 103 rotates inertia. Therefore, the rotation speed gradually decreases. Therefore, the rotation speed of the dehydration tank 103 which is gradually reduced in this way is detected by the rotation speed detection means 119a, and the detected rotation speed and the rotation speed of the lower limit predetermined in the operation program are compared with the second comparison means 121c. Compare with. Thus, when the detected rotational speed is smaller than the rotational speed of the lower limit, the power supply to the motor 104 is resumed by the action of the motor starting means 121d. The first comparing means 121a, the second comparing means 121c, the motor stopping means 121b, and the motor column means 121d are provided in the control unit of the microcomputer 121, which is the center of the present embodiment. .

Next, the microcomputer 121 will be described with reference to FIG. As shown in FIG. 19, the microcomputer 121 includes an operation switch 122 of an operation panel, a safety switch 123 linked to opening and closing of an upper cover, an input switch 124 as a water level detection means, an operation program, and the like. Information from the reset circuit 125 for setting the initial state to the initial state, the time control circuit 126 used for the timer, and the like, and the reed switch 119 used for the rotational speed detection. Thus, based on these information, various display circuits 128, which display time, process, error, and the like, motor rotation drive circuit 129 for supplying power to the motor 104 and a condenser (not shown), and a clutch or a drain valve are operated. To control the operation of the solenoid driving circuit 130.

Next, an example of the dehydration operation of the washing machine will be described according to the flowchart shown in FIG. 20 based on the present embodiment. After starting taring, electric power is supplied to the solenoid drive circuit 130 to operate the drain valve and the solenoid 118 for the clutch (step S ₁ ). Therefore, the dehydration tank 103 is supplied with electric power to the motor 104 and is in a rotatable state. Then, the water level in the dehydration tank 103 is detected by the pressure switch 124 (step S ₂ ). Then, when the water is lost in the dewatering tank 103 by the pressure switch 124 is detected, the power to the motor 104 and the condenser by means of a motor rotating the drive circuit 129 are supplied (step S _3). Therefore, the dehydration tank 103 rotates.

The reed switch 119 detects the rotation speed of the dehydration tank 103 and determines whether the rotation speed is 850 rpm or more (step S ₄ ). Therefore, when it is determined that the rotation speed of the dehydration tank 103 is 850 rpm or more, the power supply to the motor 104 and the condenser is stopped via the motor rotation driving circuit 129 (step S ₅ ). When it is determined that the rotation speed of the dehydration tank 103 is less than 850 rpm, power is continuously supplied to the motor 104 and the condenser.

After the power supply to the motor 104 and the condenser is stopped, the dehydration tank 103 rotates inertia. And by detecting the rotation speed of the dewatering tank 103 it is rotated by inertia with the reed switch 119 determines whether the speed is below 750 rpm (step S _6). So, if speed is 750 rpm or less in the dewatering tank 103, the power to the motor is fed again (step S _7). However, when the rotation speed of the dehydration tank 103 is judged to be 750 rpm or more, the dehydration tank 103 rotates as it is inertia.

Thereafter, the power of the dewatering tank 103 is increased by supplying electric power to the motor 104 through the motor rotation driving circuit 129. In this case, supplying power only to the motor 104 can be obtained by simply supplying power to the motor 104 without supplying power to the condenser. Because. So that the number of rotation by the rotational speed of the dewatering tank 103 is increased again to the detection by the reed switch 119, and the microcomputer 121 determines whether or not more than 850 rpm (step S _8). Therefore, when it is determined that the rotation speed of the dehydration tank 103 is 850 rpm or more, the power supply to the motor is stopped again (step S ₉ ).

However, when the power supply voltage is lowered when the battery is used with a device requiring a large current, or when the state of clothing or the amount of clothing during dehydration is large, power is supplied only to the motor to increase the rotation speed of the dehydration tank 103. You may not. In this case, the rotation speed of the dehydration tank 103 does not increase even when electric power to the motor 104 is supplied. In such a case, it is judged by the microcomputer 121 whether the rotation speed of the dehydration tank 103 became 700 rpm or less (step S ₁₁ ). Therefore, when it is determined that the rotation speed of the dehydration tank 103 is 700 rpm or less, the microcomputer 121 is supplied with power to the condenser (step S ₁₂ ). At this time, power to the motor 104 is being supplied. As the power is supplied to the condenser, the rotation speed of the dehydration tank 103 increases. The revolving speed of the dewatering tank 103 which has risen is detected by the reed switch 119, and it is judged by the microcomputer 121 whether the rotation speed is 850 rpm or more (step _S13 ). Therefore, when it is determined that the rotation speed of the dehydration tank 103 is 850 rpm or more, power supply to the motor 104 and the condenser is stopped (step S ₁₄ ). When the rotation speed of the dehydration tank 103 does not reach 850 rpm, electric power supply to the condenser and the motor 104 is continued. After the power supply to the motor 104 and the condenser is stopped, the dehydration tank 103 rotates inertia and it is determined whether the rotation speed is 750 rpm or more (step S ₆ ). If it is determined by the microcomputer 121 that the dehydration process time has elapsed after such rotation control of the dehydration tank 103 is repeated, the process proceeds to the next step (step S ₁₀ ).

The washing machine having the above-described configuration and function can control the rotation speed of the dehydration tank 103 during the dehydration operation and control within the range. Therefore, such a washing machine can be set within the range in which the number of revolutions of the dehydration tank 103 is set even when the same apparatus is used in different power source frequencies. Therefore, even when assembling, there is no need to select the driving pulley 113 or the V belt 116 for each power supply frequency. In addition, the name plate displayed on the product and the display in the package can be unified in the same way, thereby eliminating the trouble of sorting in the transportation step.

Next, another embodiment will be described with reference to FIGS. 21 to 25. Since the structure of the washing machine in the present embodiment is the same as the washing machine shown in FIG. 44 described in the conventional example, the description of the structure of the washing machine will be referred to the contents of the conventional example. Referring to FIG. 44, an operation panel 411 is provided on the top plate 410 installed on the upper part of the washing machine. The operation panel 411 is connected to a circuit board (not shown) in which an electronic circuit for controlling the operation of a washing machine is incorporated. A reed switch 409 for detecting the rotation speed of the dehydration tank 403 is provided at the outer bottom of the water tank 402.

Next, the dehydration operation control unit of the washing machine in the present embodiment will be described with reference to FIG. 23 is a block diagram showing a schematic configuration of a dehydration operation control unit of the washing machine. Referring to FIG. 23, the control unit includes a control circuit unit 161, an external input unit 162, and an external output unit 163. The signal detected by the external input unit 163 is input to the control circuit unit 161, and the control circuit unit 161 controls the operation of the external output unit 163 based on the signal. The control circuit unit 161 includes a memory unit 152 that stores a program related to control, a timer unit 153 that measures a predetermined time of ON and OFF to the motor relay 160, and a timer unit 153. It consists of the time control part 154 which controls, and the main control part 151 which controls the operation | movement of each part. The external input unit 162 has an input control unit 155, and information from the rotation speed sensor (lead switch) 409, the power switch 157, and the start switch 158 is input to the input control unit 155. The external output unit 163 includes an output control unit 156, and controls the operation of the motor relay 160 and the water supply solenoid valve relay 159 by the output control unit 156.

Next, the present embodiment will be described with reference to FIGS. 21 and 44 with reference to one embodiment of the dehydration tank driving method. First, the power switch 157 is inserted and then the start switch 158 is operated. Therefore, the washing process is executed by the operation program and draining is performed after the washing process is finished. Then intermediate dehydration is performed. Here, power is supplied to the motor 407 by the output control unit 156 and the motor relay 160 to rotate the motor 407. Thus, rotation of the motor 407 is transmitted to the dehydration tank 403 through the driving side pulley 408a and the driven side pulley 408b. Therefore, the dehydration tank 403 starts to rotate.

In this way, dehydration operation is started, and the rotation speed of the driven pulley 408b is detected by the reed switch 409, and the rotation speed of the driven pulley 408b is the rotation speed of the dehydration tank 403 as the input control unit 155. It is input to the main control unit 151 through. The rotation of the dehydration tank 403 is controlled based on the information previously stored in the memory unit 152.

Here, an example of the rotation drive method of the dehydration tank 403 is demonstrated with reference to FIG. 21 shows the relationship between the rotational speed rpm of the dewatering tank 403 and the control time (seconds), and the control time is taken for the rotational speed and the horizontal axis of the dehydrating tank 403 on the vertical axis. As shown in FIG. 21, the rotation speed of the dewatering tank 403 which is rotationally driven as described above gradually rises, and the preset rotational speed N ₁ (for example, N) stored in the memory unit 152 in advance. ₁ = 180 rpm), the power supply to the motor 407 is stopped. The dewatering tank 403 then rotates inertia and gradually reduces its rotation speed. Then, when the predetermined amount m (for example, m = 120 rpm) decreases from the set rotation speed N _{1 in the} first stage, power is supplied to the motor 407 again. In the intermittent control of the same number between N ₁ and rotation (N -m ₁₎ is repeated a predetermined period of time T ₁ (for example, T ₁ = 120 s).

Then it is raised to the number of revolutions by increasing the (for example, N ₂ = 480 rpm) of the rotational speed setting step of setting the number of revolutions higher than the two-step N _1, N ₂ of the back dewatering tank 403. Therefore, when it is determined by the main control unit 151 that the rotation speed of the dehydration tank 403 reaches the set rotation speed N ₂ , the power supply to the motor 407 is stopped by the motor relay 160. Therefore, the dehydration tank 403 rotates inertia, and as the rotation speed of the dehydration tank 403 decreases by a predetermined rotation speed m from the set rotation speed N ₂ of the two stages, the dehydration tank 403 is returned to the motor 407 by the motor relay 160. Power supply is performed. Such rotational speed control of the dehydration tank 403 is repeated for a predetermined time T ₂ (for example, T ₂ = 40 seconds). Thereafter, power is supplied to the motor 407 to increase the rotation speed of the dehydration tank 403. Therefore, the rotation speed N (for example, N = 800 to 900 rpm) of the dehydration tank 403 is reached.

As described above, by performing the dehydration operation for a relatively long time (T ₁ ) at a relatively low set rotational speed N ₁ , it is possible to effectively prevent a large amount of bubbles released from the laundry remaining in the water tank 402. This is because the amount of water and bubbles released from the laundry to be washed by the dehydration tank 403 and the rotation is small because the rotation speed is low. Therefore, while the water and bubbles discharged in the water tank 403 are effectively discharged from the drain pipe 412, dehydration operation is performed. As a result, the amount of bubbles remaining in the water tank 402 can be significantly reduced as compared with the related art. Thereafter the number of revolutions of the revolution speed set in the step 1, the number of revolutions of the larger second phase than N _1, N ₂ to dehydration tank (403) is raised. So, the rotation speed of the dehydration tank 403 goes up to maximum rotation speed N after that. Therefore, by increasing the rotation speed of the dehydration tank 403 step by step, the dehydration sound due to dehydration is also smaller than in the prior art.

In the above example, N ₁ = 180 rpm, but the value of N ₁ may be a value in the range of N / 5 to N / 4 (N is the maximum rotational speed). Further N, but in ₂ = 480 rpm value of N ₂ is a value in the 2N / 5 to N / 2 range. In addition, although m = 120 rpm, the value of m should just be a value within the range of N / 7-N / 6. Although T ₁ = 120 seconds, a value within the range of T ₁ = 90 to 120 seconds may be used. In T ₂ = 40 seconds, but T ₂ = T _1/2 to be a value in the range of T _1/3.

Next, with reference to FIG. 22, the case where the rotation speed control of the dehydration tank 403 which is much more multilevel than the above-mentioned example is demonstrated. FIG. 22 is a diagram showing the relationship between the rotational speed rpm of the dewatering tank 403 and the control time (seconds) in the case of performing multi-step control. Referring to FIG. 22, first, the set rotation speed N ₁ of one step and the control time T ₁ of one step are the same as the above values. Then N ' ₂ , N' ₃ ... The rotation speed of N'n is T ' ₂ , T' ₃ ,... The rotation speed control of the dehydration tank 403 similar to the above is performed by T'n time. Therefore, as in the above example, it is possible to effectively prevent the rotation failure due to the bubble restraint of the dehydration tank (403). In addition, it is possible to effectively prevent the rotation failure due to the bubble restraint of the dehydration tank 403 in a multi-step than the above example. In addition, since the rotation speed of the dehydration tank 403 is controlled in multiple stages than the above example, the time during which the dehydration tank 403 is accelerated is dispersed. Therefore, it is thought that dehydration sound becomes smaller than the above example. Here, an example of the setting rotation speed and control time in this case is demonstrated.

N'n = N ₁ + N × 0.15 × (n-1) ①

(n = 2,3,4…)

T'n = T ₁ / n (n = 2,3,4…) ②

The above ① expression shows the relationship between the set rotational speed N'n in the n stage, the set rotational speed N _{1 in the} first stage, and the highest rotational speed N. (2) is a formula showing the relationship between the control time T'n of n steps and the control time T ₁ of one step. These equations are obtained by the inventors by experiment. In the above relational expression, when multi-stage control is required up to six stages or more, the rotation control may be performed by seven or more stages by modifying the above formula to some extent.

The case where the present embodiment is performed under the same conditions described with reference to FIG. 6 for comparison with the conventional example will be described based on FIG. FIG. 24 shows the relationship between the rotational speed of the dewatering tank 403 and the control time when the experiment is carried out using the same conditions as those shown in FIG. As shown in FIG. 24, it can be seen that the rotation speed of the dehydration tank 403 reaches the maximum rotation speed N (800 rpm in this case) by executing the rotation control of the dehydration tank 403 based on this embodiment. have. Accordingly, it can be seen that the rotational restraint caused by the bubbles of the dewatering tank 403 is effectively prevented by the present embodiment.

Next, the rotation control method of the dehydration tank 403 will be briefly described. 25 is a conceptual diagram for explaining the rotation control of the dehydration tank 403 based on this embodiment. With reference to FIG. 25, the rotation speed of the dehydration tank 403 is first raised from a stationary state to a 1st rotation speed area by a 1st rotation speed raising means. Thereafter, the rotation speed of the dehydration tank 403 is maintained in the first rotation speed region for the first predetermined time by the first rotation speed maintenance means. Then, after the first predetermined time elapses, the rotation speed of the dewatering tank 403 is increased to the second rotation speed region higher than the first rotation speed range by the second rotation speed increasing means. Thereafter, the rotation speed of the dehydration tank 403 is maintained in the second rotation speed region for the second predetermined time by the second rotation speed maintenance means. Then, by the third rotation speed increasing means, the rotation speed of the dehydration tank 403 is increased to the highest rotation speed higher than the second rotation speed region after the second predetermined time elapses.

Next, another embodiment will be described with reference to FIGS. 26 to 32. FIG. Since the structure of the washing machine in this embodiment is the same as that shown in FIG. 46, the structure of the washing machine in this embodiment will be described with reference to FIG. In this embodiment, the washing machine includes a water tank 451 embedded in an outer housing (not shown), a dehydration tank 452 embedded in the water tank 451, and a dehydration tank 452. A rotary vane 453 rotatably provided at the bottom, a dehydration shaft 454 fixed to the bottom of the dehydration tank 452, a rotary vane shaft 455 at which one of the rotary vanes 453 is fixed, and a rotation Rotation of the driven side pulley 456 fixed to the other end of the blade shaft 455, the motor 458, the drive side pulley 459 fixed to the motor shaft of the motor 458, and the drive side pulley 459. Belt 457 for transmitting the gears to the driven pulley 456, the magnet 461 attached to the upper surface of the driven pulley 456, and the assembly angles at positions spaced apart from each other by the magnet 461. Washing step by selectively transmitting the driving force of the reed switch 462 and the motor 458 to the rotary blade 453 or the rotary blade 453 and the dehydration tank 452 by inserting the 463. It is provided with a switching mechanism (referred to as 460, the "appropriate clutch mechanism") for switching the process.

In addition, the washing machine based on this embodiment is considered, for example, when the start / pause button (not shown) is pressed during the dehydration operation, or when the dehydration operation is interrupted or when the dewatering operation once stopped is resumed. It is a constitution. 26 is a block diagram showing control until the dehydration operation is stopped and the clutch switching mechanism 460 is operated. As shown in FIG. 26, the washing machine based on the present embodiment is a motor energization control means for stopping the power supply to the motor 458 according to the release command of the dehydration mode for the case where the dehydration operation is stopped as described above. 202 and the rotation speed determination means 203 for determining whether the rotation speed of the dehydration tank 452 is smaller than a predetermined value after the power supply to the motor 458 is stopped, and the rotation speed determination means 203. The clutch switching mechanism operating means 205 which operates the clutch switching mechanism 460 as it is judged that the rotation speed of the dehydration tank 452 becomes smaller than a predetermined value by this is provided.

In addition, the washing machine based on the present embodiment includes a dehydration mode start command output means 206 which issues a dehydration mode start command for resuming the dehydration operation after the dehydration operation is stopped as shown in FIG. 27, and the dehydration mode. Starts the power supply to the clutch switching mechanism control means 207 for operating the clutch switching mechanism 460 and the power supply to the motor 458 after the clutch is disconnected as the clutch switching mechanism 460 operates. Means 208 are provided.

Here, with reference to FIG. 32, the structure of the clutch switching mechanism 460 is demonstrated in detail. 32 is a plan view showing a schematic configuration of the clutch switching mechanism 460. As shown in FIG. 32, the clutch switching mechanism 460 includes a clutch gear 216 fitted outwardly to the dehydration shaft 454, and a dehydration shaft 454 and a rotating blade shaft when engaged with the clutch gear 216. Tighten the clutch lever 217, the brake wheel 218 provided on the dewatering shaft 454, the brake wheel 218 wound around the brake wheel 218, and the brake band 219. Brake lever 220 for reducing or reducing the pressure, driving means 222 for swinging the clutch lever 217 and the brake lever 220 around the shaft 221, and the rotation blade by slowing down the rotation of the rotary blade shaft 4555. It consists of a deceleration mechanism (not shown) which transmits the driving force of the motor 458 to 453. Moreover, the clutch lever 217 is provided in the brake lever 220, and operates integrally with the brake lever 220. As shown in FIG.

The drive means 222 is provided with a switching motor 223, a connecting member 224 installed on the brake lever 220 to swing the brake lever 220, and connecting the connecting member 224 and the switching motor 223 to each other. It consists of a cable 235 and a wire 227. Moreover, the pulley of the switching motor 223 is shown in figure as the switching motor 223, and one end of the wire 227 is provided in the pulley. The other end of the wire 227 is fixed to the cable 235. Thus, as the switching motor 223 rotates, the wire 227 is wound around the pulley of the switching motor 223 so that the cable 225 and the connecting member 224 move. The other end of the connecting member 224 is provided with a drain valve 226 and the drain valve 226 is opened and closed as the connecting member 224 operates. A return spring is installed in the drain valve 226 and the connection member 224 so that the power supply to the switching motor 223 is stopped, so that the connection member 224 and the drain valve 226 are originally caused by the elastic force of the return spring. Return to the state of.

In the dehydration, the wire 227 is wound around the pulley of the switching motor 223 as the switching motor 223 rotates. Thus, the cable 225 and the connecting member 224 move in the direction of the switching motor 223. Therefore, the brake lever 220 and the clutch lever 217 move to the position indicated by the dashed line in the figure. At this time, the brake band 219 is in a relaxed state. As the clutch lever 217 is spaced apart from the clutch gear 216 in this way, the dehydration shaft 454 and the rotary blade shaft 455 are in a connected state. Therefore, the driving force of the motor 458 is transmitted from the rotary blade shaft 455 to the dehydration shaft 454.

Next, the control circuit in this embodiment will be described with reference to FIG. 28 shows a control circuit diagram of this embodiment. As shown in FIG. 28, the rotation speed determination means 203 is connected to the rotation speed detection means 204. As shown in FIG. Therefore, the rotation speed of the dehydration tank 452 detected by the rotation speed detection means 204 is input to the input terminal a of the rotation speed determination means 203. The output terminal b of the rotation speed determination means 203 is connected to the motor 458 via the rotation drive block 210 of the motor 458. Therefore, the motor 458 rotates in the dehydration direction. Further, an advanced phase condenser 458a is provided in the motor 458, so that the motor 458 rotates in the dehydration direction or in the reverse direction of the dehydration direction. The motor 458 is also connected to the rotary vane rotation control means 209 via the rotation drive block 211 of the motor 458. Therefore, the motor 458 rotates in the reverse direction of the dehydration direction. The switching motor 223 is connected to the output terminal c of the rotation speed determination means 203 via the drive block 212 for dehydration switching.

29 shows a circuit diagram of the rotation speed detection means 204. The rotation speed detecting means is composed of a magnet 461 and a reed switch 462. And as shown in FIG. 29, the rotation speed control means 203 in which the reed switch 462 consists of a microcomputer with the resistance 214, and the rotation speed control means 203 consists of a microcomputer with the resistance 214 is shown. Is connected to the input terminal a of. Therefore, the rotation speed of the dehydration tank 452 detected by the reed switch 462 is input to the input terminal a of the rotation speed determination means 202. 30 shows the voltage waveform input from the reed switch 462 to the rotation speed determination means 203. As shown in FIG. 30, it can be seen that the brake operates when the interval between pulses is widened. Thus, by measuring the interval (time) T between the pulses and the pulses, it is determined whether the dehydration tank 452 is rotating at a high speed or at a slow speed.

The reference time T ₁ is input to the circuit number determination circuit 203 in advance. Therefore, when the time T between the reference time T ₁ and the pulse is compared and T> T _1, it is determined that the dehydration tank 452 is stopped or slowly rotates. Moreover, when T≥T _1, it is determined that the dehydration tank 452 is rotating at a high speed. Therefore, since the rotation speed determination means 203 does not operate the clutch cut mechanism 460 when it determines that the dehydration tank 452 is rotating rapidly, the rotation speed determination means 203 does not operate | move the noise produced by the clutch lever 217 rubbing against the clutch gear 216. It can be prevented.

Here, the dehydration operation control when the dehydration operation is stopped during the dehydration operation of the washing machine having the above configuration will be described in more detail with reference to FIG. 31. 31 is a flowchart showing control in the case where the dewatering operation is stopped and then the dewatering operation is started again. In FIG. 31, assume that in FIG. 31, main routine processing (dehydration processing) is being performed (step S ₁ ). Then, when the user presses the start / pause button by mistake or the safety device is operated by opening the top cover by a predetermined angle or more, the dehydration operation is stopped (step S ₂ ). After that, by detecting the rotational pulse by the rotational speed determination means 203, the time T from the detection of the next rotational pulse (step S ₃ ) is measured, and the reference time T ₁ inputted in advance and the measured pulse are measured. Time T is compared (step S ₄ ). For example, if the reference time T ₁ is 2.0 seconds, for example, when T? 2.0 seconds, the dehydration tank 452 determines that the dewatering tank 452 is rotating at a high speed. And if the detection of the rotation pulse in between has the run timer as T = 0 (step S _8). When no rotation pulse is detected, T is timed up (step S ₉ ). Then, power is supplied to the switching motor 223 (step S ₁₀ ). The dehydration process is then continued (step S ₁₄ ).

When the reference time T ₁ is 2.0 seconds, when T> 2.0 seconds, the rotation speed determination means 203 considers that the dehydration tank 452 is stopped or is rotating at low speed. Thus, the power supply to the switching motor is stopped and at the same time the brake is applied to stop the rotation of the dehydration tank 452 (step S ₅ ). In this case, since the dehydration tank 452 rotates at a low speed, it is possible to prevent the clutch or brake from generating friction noise. Then, when the start / pause button is pressed again or when the top cover is closed, the dehydration operation is started again (step S ₁₁ ). In this case, first, power is supplied to the switching motor 223, and the clutch lever 217 falls from the clutch gear 216 (step S ₁₂ ). Thereafter, power is supplied to the motor 458 (step S ₁₃ ). Therefore, the dehydration process is resumed (step S ₁₄ ). Even when the dehydration operation is resumed as described above, since the power is not supplied to the motor 458 unless the clutch lever 217 is separated from the clutch gear 216, the clutch lever 217 and the clutch gear 216 are rubbed. The noise generated can be prevented.

Next, another aspect of control will be described with reference to FIG. This is equipped with the dehydration mode determination means which judges whether it is a dehydration mode again in the said control method. If the case where it is determined in the dehydration mode by the mode determining means, the dehydration and in the flowchart shown in FIG. 3 with M = 1, not a dehydration mode is to determine the M = 0 (step S _15). In addition, since control is the same as the above, description is abbreviate | omitted. By providing the dehydration mode determination means, once the dehydration operation is started, the dehydration operation is continued until the end of the dehydration mode irrespective of the interval of the rotation pulse. Thus, when the dehydration mode ends, the power supply to the switching motor 223 is stopped and M = 0 and the process proceeds to the next step. In this way, when the dehydration mode determination means is provided, the time required for detecting the interval of the rotation pulse is not required once the dehydration mode is set, so that the processing time on the software can be shortened and the control can be simplified.

Next, another embodiment will be described with reference to FIGS. 31 to 41. FIG. 34 is a sectional view of the washing machine in this embodiment. 35 is an exploded perspective view of the washing machine in the present embodiment.

As shown in FIG. 34, the washing machine in this embodiment has a water tank 256 embedded in the outer housing assembly 258 in a suspended state by the support rod 257. As shown in FIG. The dehydration tank 250 is rotatably embedded in the water tank 256. The rotary blade 251 is rotatably installed at the inner bottom of the dehydration tank 250. The dehydration tank 250 is connected to the rotation transmission mechanism part 255 provided in the bottom of the water tank 256 through the dehydration shaft 253. Moreover, the motor 252 is provided in the bottom part of the water tank 256, and the rotation transmission mechanism part 255 transmits the rotation of the motor 252 to the dehydration tank 250. Moreover, as shown in FIG. Moreover, the inside of the dehydration shaft 253 is provided with the rotary blade shaft (not shown) for connecting to the rotary blade 251 and rotating the rotary blade 251. The rotation of the motor 252 is also transmitted to the rotary blade shaft through the rotation transmission mechanism 255. The rotation transmission mechanism part 255 is provided with the switching mechanism part 255a, and rotation of the motor 252 is selectively transmitted to the rotary blade 251 or the dehydration tank 250 by the switching mechanism part 255a. The drain pipe 254 is provided in the bottom of the water tank 256, and the drain valve 254a is provided in the drain pipe 254.

The synthetic resin outer housing assembly 258 of the washing machine having the internal structure as described above includes an outer housing upper part 259 and an outer housing lower part 260 divided up and down in FIGS. 34 and 35 and an outer housing upper part ( It is attached to the upper end of 259, and consists of a reinforcement frame 261 supporting the water tank 256. Thus, an upper plate 262 having an operation panel for washing control is mounted on the reinforcing material 261. The four corner parts of the reinforcing frame 261 are provided with a spherical accommodating part 261a for supporting the supporting rod 257. The reinforcing frame 261 is formed to fit on the upper end of the outer housing upper part 259 and is screwed.

As shown in FIG. 34, the outer housing upper portion 259 has an area of the upper end opening larger than that of the lower end opening, and its inner wall is one surface. Accordingly, the outer housing upper portion 259 has a tapered shape in which the lower end thereof is narrower than the upper end thereof. This is achieved by molding the reinforcing frame 261 separately from the upper portion of the outer housing 259. Conventionally, since the outer housing upper part 259 and the reinforcing frame 261 are integrally molded, the molding die could not be removed in the upper direction of the outer housing upper part 259. However, by forming the reinforcing frame 261 and the outer housing upper portion 259 separately, the molding die can be pulled out in the upper direction of the outer housing upper portion 259. Therefore, the upper end portion of the upper portion of the outer housing can be made narrower than the lower end portion. In addition, since the molding die can be pulled out upward, the engaging portion 259a of the outer housing upper portion 259 and the lower portion 260 can protrude to the inner wall of the outer housing upper portion 259 on the lower inner wall of the outer housing upper portion 259. It becomes possible. Therefore, when the outer housing upper part 259 and the lower part 260 are combined, the outer wall of the outer housing upper part 259 and the outer wall of the outer housing lower part 260 may be almost one surface at the coupling part 259a.

In the outer housing lower part 260, the area of the upper end opening is set larger than the area of the lower end, and the inner wall thereof is one surface. Thus, the upper end of the outer housing lower part 260 is fitted to the lower engaging portion 259a of the outer housing upper part 259 and is coupled with a screw or the like. At this time, as described above, the outer surface of the outer housing upper portion 259 and the outer housing lower portion 260 is almost one surface at the engaging portion 259a, so that the outer housing as a whole has a substantially uniform tapered shape. In this embodiment, the outer wall surface of the outer housing is inclined by about 0.8 degrees to 3.0 degrees with respect to the vertical direction. Therefore, the lower area of the washing machine can be made small and the installation space can be made smaller. In addition, as described in the conventional example, when the vibration of the water tank 256 is considered in washing, a portion considered to be an unnecessary space can be made small. In other words, unnecessary space in the washing machine can be reduced.

In addition, the outer housing upper part 511 of the conventional synthetic resin washing machine has a tapered shape that widens from the upper end to the lower end as shown in FIG. 48, and the outer housing upper part 511 and the lower part 512 are coupled to each other. The wealth is expanding. Therefore, the user's knee is likely to touch the joint, and in order to avoid this, the user must bend the posture forward. Therefore, workability was not necessarily good. Even in this case, according to the shape of the outer housing of the washing machine in the present embodiment, the above problem is solved. In addition, the expansion of the coupling portion as in the prior art is also eliminated, the appearance is also improved.

Next, the shape of the reinforcing frame 261 in the present embodiment will be described in more detail with reference to FIGS. 36 and 37. 36 is an exploded perspective view of the washing machine in the present embodiment. FIG. 37 is an enlarged cross-sectional view of the screw stop of the reinforcing frame 261 in FIG.

Referring to FIG. 36, the reinforcing frame 261 of the washing machine is fitted to the upper end of the outer frame upper part 259, and the upper plate 262 is attached to the upper part of the reinforcing frame 261. The top plate 262 is fixed to the assembly bosses 253 (two places) provided in front of the reinforcement flame 261 and the assembly bosses 264, two places provided at the rear side with screws 265 in the transverse direction, respectively. The lower portion of the assembling bosses 263 and 264 is provided with a synthetic resin cap 266 formed integrally with the reinforcing frame 261. The cap 266 is integrally formed with the reinforcing frame 261 so as to be bendable by sandwiching a thin hinge portion 266a in the reinforcing frame 261 with reference to FIG. 37. Moreover, the stop member 266b is provided in the front-end | tip of the cap 266, and the stop member 266b is fitted in the hole 269a provided in the attachment sheet 262 of the top plate 262. As shown in FIG. Therefore, after fixing the reinforcing frame 261 and the top plate 262 with the screw 265, the head of the screw 265 is concealed.

As mentioned above, the head of the screw 265 is hidden by shape | molding the cap 266b integrally with the reinforcement frame 261 so that appearance can be improved. In addition, the cost can be reduced and the installation work becomes easier as compared with the case where the cap 266 is set separately. In addition, parts management can be simplified.

Next, referring to FIG. 38 and FIG. 39 as compared with other aspects of the reinforcing frame 261. 38 is an exploded perspective view of the washing machine in the present embodiment when a reinforcing frame of another embodiment is used. FIG. 39 is a partially enlarged cross-sectional view showing a screw stop between the reinforcing frame 261b and the top plate 262.

As shown in FIG. 38, the top plate 262 is provided with the top cover 267 for injecting laundry, and the operation panel 268 with a switch or display part for washing control. The reinforcement frame 261b has a cylindrical assembly boss 270 (two places) in front. Assembling bosses 271 and two places are provided at the rear. Therefore, the assembly boss 270 provided in the front is provided so that the end opening may face substantially perpendicular to the upper surface of the reinforcing frame 261b, that is, the opening faces upward. The boss accommodating part 272 is provided in the lower part of the upper surface plate 262. As shown in FIG. And the boss accommodating part 272 is provided with the cylindrical recessed part 272a. Therefore, when the screw is fixed, the head of the screw 265 is buried. A cylindrical guide portion 273 is provided below the boss accommodating portion 272, and the upper projecting portion 270a of the assembling boss 270 provided with the guide portion 273 in front of the reinforcing frame 261b. Is fitted on.

In the above configuration, when attaching the top plate 262 to the reinforcing frame 261b, the assembly boss 270 of the reinforcing frame 261b is first assembled with the guide portion 273 of the boss accommodating portion 272 provided on the top plate 262. To the protrusion 270a. Thereby, the position of the upper surface plate 262 and the reinforcement frame 261b can be determined. Then, after fixing the screw 265 and the reinforcing frame (261b) to fit the cap 274 on the upper end of the boss receiving portion (272). Therefore, even if the size of the top plate 262 is larger than the outer housing top 259 due to uneven production, the amount of the front portion of the top plate 262 protruding from the front surface of the outer housing top 259 is reduced compared to the prior art. Therefore, it is possible to maintain a good appearance even if the shape is slightly different due to production problems.

Next, a case in which the bubble generator for bubble cleaning is mounted in the washing machine in the present embodiment will be described with reference to FIGS. 40 and 41. 40 is a perspective view of the washing machine in the case where the bubble generator is mounted in this embodiment. 41 is an enlarged cross-sectional view of the bubble generator mounting portion.

As shown in FIG. 40, the washing machine is equipped with a box-shaped top plate assembly 275 provided with an operation panel on an upper portion of the outer housing assembly 258, and therein, a bubble generator 281 is incorporated therein. For example, the bubble generator 281 is attached to a portion corresponding to A in FIG.

The top plate assembly 275 consists of a top cover rear portion 276, a top cover front portion 277, a back panel 278, a front panel 279 and a top plate 280. As shown in FIG. 41, the bubble generator mounting portion of the top plate 280 is provided with a convex portion 282 for mounting the bubble generator 281 spaced apart from the reinforcing frame 261. Therefore, the protrusion 285 is provided in the convex part 282, and the buffer 283 which consists of rubber | gum etc. is provided in the bolo part 285, for example. The bubble generating device 281 is disposed on the convex portion 282 through the buffer 283. By providing the buffer 283, it is possible to effectively prevent the vibration of the bubble generator 281 from being transmitted to the reinforcing frame 261.

On the other hand, a projection 284 is provided on the upper inner wall of the rear panel 278 in which the bubble generating device 281 is directly disposed below to prevent the bubble generating device 281 from falling off from the convex portion 282. . There is a predetermined interval H 'between the protrusion 284 and the bubble generator 281. Therefore, the vibration of the bubble generator 281 can be prevented from being transmitted to the back panel 278. The spacing H 'is set smaller than the projecting dimension H of the projecting portion 285 on the ball curved portion 282. Therefore, the bubble generator 281 can be prevented from falling off from the convex portion 282. As a result, the bubble generator can be prevented from dropping even when the bubble generator is installed in the top plate assembly 275 in advance, and transported while the bubble generator is mounted in the top plate assembly 275. As a result, the problem of having to correct the position of the bubble generator in the energization inspection process is eliminated.

Claims (4)

A washing machine comprising a rotary vane driven to rotate by a motor, a dehydration tank connected to the rotary vane by a clutch, and a clutch switching mechanism for connecting the rotary vane and the dehydrating tank to a connected or disconnected state by operating the clutch. WHEREIN: Dehydration mode release command output means which issues the release command of a dehydration mode, motor electricity supply control means for stopping electric power supply to the said motor based on the release command by the said dehydration mode release command output means, and said dehydration Rotation speed determination means for detecting that the rotation speed of the tank is equal to or lower than the adjustment value; Number of clutch changer operations to disconnect the rotor blades Washing machine, characterized in that it includes a. 2. The rotation apparatus according to claim 1, wherein the cetic is provided with rotation speed detecting means for detecting the rotation speed of the dewatering tank, and the rotation speed determining means is connected to the rotation speed detecting means and detected by the rotation speed detecting means. A washing machine characterized in that a number is inputted to said rotation speed determining means. The washing machine according to claim 2, wherein the rotation speed detecting means includes a magnet attached to a rotating member that rotates together with the dehydration tank, and a reed switch attached to the fixing member at a predetermined distance from the magnet. A washing machine having a rotary blade driven by rotation with a motor, a dehydration tank connected to the rotary blade by a clutch, and a clutch switching mechanism for connecting the rotary blade and the dehydration tank to a connected state or a disconnected state by operating the clutch. A dehydration mode start command output means for outputting a dehydration mode start command and a dehydration mode start command output means for moving the clutch as the dehydration mode is started to bring the rotary vane and the dehydration tank into a connected state. And a clutch switching mechanism control means and a motor energization start means for supplying electric power to the motor after the rotary blade and the dehydration tank are connected to each other.