JP2022107383A - Drum-type washing machine enabling jet flow-type washing, jet flow-type washing method using drum-type washing machine, and jet flow-type washing unit for drum-type washing machine - Google Patents

Abstract

To enable jet flow-type washing by using a specific drum-type washing machine.SOLUTION: A drum-type washing machine includes: a pulsator 4 which is provided at a bottom of a drum 3 and rotatable independently of the drum 3; and a jet flow-type washing unit 7 which is accommodated in the drum 3 and connected with the pulsator 4. A controller 6 includes a special washing processing section 6b for executing jet-flow type washing by using the jet flow-type washing unit 7. While the jet flow-type washing unit 7 is arranged on a lower side within the drum 3, the special washing processing section 6b executes water storage processing for storing water in a water storage tub 40 of the jet flow-type washing unit 7, and rotates the pulsator 4 to rotate a sub-pulsator 42 provided on a side face of the water storage tub 40 while rotation of the drum 3 is restricted.SELECTED DRAWING: Figure 11

Description

The technique to be disclosed relates to a technique for realizing jet-type washing using a drum-type washing machine.

A drum-type washing machine is a washing machine in which a drum for accommodating laundry rotates around a horizontal horizontal axis or an inclined axis. In a drum-type washing machine, the laundry is lifted and dropped by the rotation of the drum, and the impact is used to wash the laundry (so-called tap washing).

Therefore, the amount of water required for the drum-type washing machine is such that the clothes get wet, which is excellent in saving water. In addition, since the amount of water is small, detergent and the like can be brought into contact with clothes at a high concentration, and there is an advantage that the chemical action thereof can be effectively exerted.

Regarding the technology to be disclosed, although it is not a drum-type washing machine, Patent Document 1 states that a small water tank is attached on a pulsator so that a small amount of clothes can be washed with a small amount of water using the water tank. The vertical washing machine is disclosed.

Further, regarding the technique to be disclosed, the applicant has proposed a high-performance drum-type washing machine that can obtain a washing effect superior to that of the conventional drum-type washing machine (Patent Document 2). The drum-type washing machine includes a drum that can rotate in both forward and reverse directions, and a pulsator that can rotate in both forward and reverse directions independently of the drum. Then, in the washing and rinsing process, both the drum and the pulsator are independently rotationally driven so as to increase the fluidity of the clothes.

The jet type is a washing method using a washing machine in which the pulsator is arranged on the side surface of the water tank, unlike the vertical washing machine in which the pulsator is arranged on the bottom surface of the water tank. Jet-type washing machines have been used before vertical washing machines.

Japanese Unexamined Patent Publication No. 2019-84328 Japanese Unexamined Patent Publication No. 2020-110369

Children's clothing and sportswear can get very dirty with mud. In addition, work clothes and the like may be severely soiled with oil.

In the case of a vertical washing machine, clothes are agitated and washed in a large amount of water, so that even heavily soiled clothes can be effectively washed because the stains can be diffused in a large amount of water. In addition, as the clothes move around, the rubbing between the cloths and the friction with the pulsator and the housing increase, and the cleaning power increases. Furthermore, dirt is easily removed by twisting or expanding and contracting the cloth. However, in terms of water saving, it has the disadvantage of being inferior to drum-type washing machines. The same applies to the jet-type washing machine.

On the other hand, since the drum-type washing machine is mainly washed with a small amount of water by the impact of dropping clothes, the clothes are less likely to be rubbed or deformed, and the water is easily contaminated. Therefore, it is difficult for dirt to move from clothes to water, and it is difficult for dirt to be removed. Therefore, the drum-type washing machine has a problem that it is difficult to wash heavily soiled clothes.

You may also want to use a washing machine to wash pet supplies such as dogs and cats. In addition, you may want to wash the cloth diaper. There is a desire to wash such laundry separately from ordinary clothes. Conventionally, in order to meet the demand, a dedicated washing machine has been separately installed or a coin laundry has been used.

On the other hand, the applicant has proposed a high-performance drum-type washing machine equipped with a pulsator that rotates independently of the drum, as described above. The present inventors have found that by utilizing the function of this drum-type washing machine, jet-type washing becomes possible, and the above-mentioned problems can be solved and the demand can be realized.

That is, the main purpose of the disclosed technique is to realize jet-type washing in a drum-type washing machine.

The technique to be disclosed relates to a drum-type washing machine capable of jet-type washing.

The drum-type washing machine has a housing having an inlet on the front surface, a tab that can store water installed inside the housing, and a rotatable tab on the tab with an opening facing the inlet. A housed drum, a water supply device for supplying water to the tab, a drainage device for draining water from the tab, a pulsator installed at the bottom of the drum and rotatable independently of the drum, the water supply device, and the water supply device. A control device that controls the operation of the drainage device and the rotation of the drum and the pulsator, and a jet-type washing machine that can be accommodated in the drum through the inlet and can be connected to the pulsator. It is equipped with a unit.

The jet-type washing unit includes a water storage tank capable of storing water, a subpulsator rotatably installed on the side surface of the water storage tank, and a rotational force transmission mechanism for transmitting the rotational force of the pulsator to the subpulsator. is doing.

The control device has a special cleaning processing unit that executes jet-type washing using the jet-type washing unit, and the jet-type washing unit is located below the inside of the drum so as to be connected to the pulsator. In the arranged state, the special cleaning processing unit operates the water supply device to store water in the water storage tank, and the sub is rotated by rotating the pulsator in a state where the rotation of the drum is restricted. It is configured to perform a jet-type washing process that rotates the pulsator.

That is, unlike a general drum-type washing machine, this drum-type washing machine has a pulsator that can rotate independently of the drum at the bottom of the drum. Then, a jet-type washing unit that operates by utilizing the rotation of the pulsator is provided, and it is possible to perform jet-type washing that is different from the tap-washing performed by the drum-type washing machine.

Specifically, the special cleaning processing unit of the control device operates the water supply device to store water in the water tank of the jet-type washing unit, and regulates the rotation of the drum so that the jet-type washing unit does not move. Then, rotate the pulsator to rotate the sub-pulsator installed on the side of the water tank.

As a result, the laundry put into the water tank is agitated by the subpulsator together with the water. That is, unlike a vertical washing machine, the laundry is agitated and washed in a large amount of water, so that even heavily soiled clothes can diffuse the dirt in a large amount of water.

Therefore, it is possible to effectively wash heavily soiled laundry. Since the water tank has a smaller capacity than the drum, it also has the advantage of being able to save water. If the inside of the water tank is isolated from the inside of the drum, it is possible to handle laundry that you want to wash separately from ordinary clothes. According to this drum type washing machine, convenience is improved.

The drum-type washing machine is also provided with rotation regulating means capable of mechanically engaging the tab and the drum, and the rotation of the drum is regulated by the rotation regulating means. good.

Then, the rotation of the drum can be regulated stably.

When the drum-type washing machine further includes a motor for rotationally driving the drum, the rotation of the drum may be restricted by electrically controlling the motor.

In this case as well, the rotation of the drum can be regulated. Since it is electrically controlled, it has the advantage of not requiring a mechanical mechanism.

In the drum type washing machine, the special washing processing unit may rotate the subpulsator in both the forward rotation direction and the reverse rotation direction in the jet type washing process.

By reversing the rotation direction of the pulsator, the stirring action is promoted, so that the washing effect can be improved.

The drum-type washing machine also has a connecting portion in which the jet-type washing unit is detachably fitted to the surface of the pulsator to be connected to the pulsator, and the pulsator can be connected to the pulsator through the connecting portion. The rotational power may be transmitted to the jet type washing unit.

On the surface of the pulsator, protrusions for stirring that extend radially are provided. Therefore, if the pulsator is fitted to the unevenness of the surface of the pulsator via the connecting portion, the rotational power of the pulsator is transmitted to the jet-type washing unit without separately providing a connecting member or a connecting portion on the pulsator. be able to.

The drum-type washing machine also has the connecting portion fitted to the surface of the pulsator by pushing the jet-type washing unit arranged on the inner lower side of the drum by a door that closes the inlet. The state may be retained.

If you press the jet-type washing unit against the pulsator with the door, you can connect it to the pulsator by using the unevenness of the surface of the pulsator. The rotational power of the pulsator can be transmitted to the jet-type washing unit without separately providing a connecting member or a connecting portion on the pulsator.

In the drum type washing machine, the rotational force transmission mechanism is hooked on a drive pulley provided coaxially with the connecting portion, a driven pulley provided coaxially with the subpulsator, and the drive pulley and the driven pulley. You may have the belt passed.

Then, the rotational force transmission mechanism can be configured with the minimum necessary and simple members, and the structure of the jet type washing unit can be simplified. Manufacturing costs can also be suppressed.

The drum-type washing machine may also have the drive pulley and the driven pulley installed on the same side wall of the water tank, and the subpulsator may be arranged at a position lower than the connecting portion.

If the drive pulley and the driven pulley are installed on the same side wall of the water tank, the structure can be further simplified. By arranging the connecting portion relatively high, the rotation centers of the connecting portion and the pulsator can be aligned, and by arranging the sub pulsator relatively low, the sub pulsator can be stored even with a small amount of water. The subpulsator can be placed under the surface of the water even if the size of is increased. If the subpulsator is placed below the surface of the water, the stirring performance of water is improved, so that the washing effect is improved.

When the drum-type washing machine further includes a water circulation mechanism that circulates water stored in the tab by injecting it from a nozzle into the inside of the drum, the jet-type washing unit can pass water that can be connected to the nozzle. The special cleaning treatment unit may operate the water circulation mechanism to supply water to the water storage tank through the nozzle and the water passage means when the water storage treatment is executed.

Then, the water circulation mechanism can be used to supply water to the water tank. That is, water can be automatically supplied by control, omitting manual operation.

In the drum type washing machine, when the drainage device has a drainage pump for draining water stored in the tab, one end is connected to a portion of the drainage path on the upstream side of the drainage pump and the vicinity of the inlet. Further having a drainage bypass path in which the other end is arranged, the jet-type washing unit has a second water passage means that can be connected to the drainage bypass path, and the special cleaning treatment unit executes wastewater treatment. Occasionally, the drainage pump may be activated to drain water from the water storage tank through the second water passage means and the drainage bypass path.

Then, the drainage pump can be used to drain water from the water tank. That is, the water can be automatically drained by control, omitting the manual operation.

The technique disclosed also relates to a jet-type washing method using a drum-type washing machine equipped with a pulsator that can rotate independently of the drum.

In the washing method, a jet-type washing unit having a sub-pulsator configured to be rotatable in conjunction with the rotation of the pulsator on the side surface of the water tank is housed in the drum through the inlet and connected to the pulsator. The subpulsator is rotated by rotating the pulsator with the first step of fixing the inside of the drum to the lower side, the second step of storing water in the water tank, and the rotation of the drum being restricted. Includes a third step to make it.

As described for the drum-type washing machine described above, according to this washing method, a jet-type washing different from the original washing type can be performed using a specific drum-type washing machine. Therefore, even heavily soiled laundry can be effectively washed.

In the first step, the jet-type washing unit may be pressed against the pulsator by a door that closes the inlet, so that the jet-type washing unit is fixed to the inner lower side of the drum so as to be connected to the pulsator.

If you press the jet-type washing unit against the pulsator with the door, you can connect it to the pulsator by using the unevenness of the surface of the pulsator. The rotational power of the pulsator can be transmitted to the jet-type washing unit without separately providing a connecting member or a connecting portion on the pulsator.

In the third step, the pulsator may be rotated in both the forward rotation direction and the reverse rotation direction. Further, in the second step, water may be supplied to the water storage tank by using the water circulation mechanism provided in the drum type washing machine.

In either case, the same effect as described in the drum type washing machine described above can be obtained.

According to the disclosed technique, jet-type washing can be performed in a drum-type washing machine. Therefore, clothes and the like that are heavily soiled can be effectively washed, which improves convenience.

It is a figure for demonstrating washing of clothes by a vertical washing machine. It is a figure for demonstrating washing of clothes by a drum type washing machine. It is the schematic sectional drawing which shows the structure of the drum type washing machine of embodiment. It is the schematic which shows the structure of a water circulation mechanism and a drainage device. It is a block diagram which shows the relationship between a controller and its main related apparatus. It is a schematic perspective view which shows the jet type washing unit. It is a schematic view (left figure) seen from the side and the schematic view (right figure) seen from the rear of a jet type washing unit. FIG. 6 is a schematic cross-sectional view taken along the line XX of the arrow in FIG. It is schematic cross-sectional view which shows the state which installed the jet type washing unit in the drum type washing machine. It is the schematic which shows an example of the mechanical regulation means which regulates the rotation of a drum. It is a flowchart which exemplifies a series flow of a jet type washing process. It is the schematic which shows the main state in a jet type washing process.

<Washing machine type>
Washing machines for home use are roughly divided into vertical washing machines and drum-type washing machines. These washing machines are illustrated in FIGS. 1A and 1B.

As shown in FIG. 1A, in a vertical washing machine, generally, clothes and a sufficient amount of washing water are stored in a drum in a vertically placed water tank, and the stored washing water is stirred by a pulsator (stirring blade). Wash clothes with the water flow generated by doing so (so-called "fir-washing").

On the other hand, in the drum type washing machine, as shown in FIG. 1B, the drum is horizontally placed in the water tank. The drum contains clothes and a small amount of washing water, and the clothes are washed by the mechanical action of lifting and dropping the clothes by the rotation of the drum (so-called "tapping"). In particular, in Europe and the United States, it is generally performed with a smaller amount of water (appearingly wet clothes) than a Japanese drum-type washing machine. Therefore, the drum type washing machine has an advantage that water can be saved as compared with the vertical type washing machine.

However, in the case of a drum-type washing machine, since the amount of washing water is small, the washing water becomes dirty immediately. Therefore, there is a problem that it is difficult to wash heavily soiled laundry. It is conceivable to repeat water supply and drainage, but in that case, the washing process becomes complicated and the processing time becomes long.

Further, in the case of a drum-type washing machine, it is difficult to enhance the washing power because the magnitude of the mechanical action of tapping is almost determined by the head of clothes due to the size of the drum. It is conceivable to increase the number of rotations of the drum to increase the frequency of falling, but even in that case, there is a limit because the clothes stick to the drum and do not fall when the number of rotations increases.

Therefore, the applicant has proposed a drum-type washing machine equipped with a pulsator that rotates independently of the drum (hereinafter, also referred to as a "high-performance washing machine"; see Patent Document 2). According to this high-performance washing machine, in addition to the mechanical action of "tapping" obtained by a conventional drum-type washing machine, the action of rubbing clothes with each other, the pulsator, and the housing due to the flow of clothes and the clothes twisting. -It is also possible to obtain the action of rubbing the deforming action. Therefore, this high-performance washing machine is superior in detergency to the conventional drum-type washing machine.

The technology to be disclosed is an application of this high-performance washing machine. Therefore, the drum-type washing machine disclosed in the present embodiment is based on this high-performance washing machine.

<Drum type washing machine>
FIG. 2 shows the structure of the drum-type washing machine of the present embodiment (hereinafter, also referred to as washing machine 1). The washing machine 1 is composed of a housing 10, a tab 2, a drum 3, a pulsator 4, a motor 5, a controller 6 (control device), and the like. Further, the washing machine 1 is a unit that enables jet-type washing in order to effectively wash heavily soiled clothes and laundry that is desired to be washed separately from ordinary clothes (spout-type washing unit 7). Is also equipped (the jet-type washing unit 7 will be described later).

The washing machine 1 is configured so that each step of the washing step, the rinsing step, and the dehydration step can be automatically performed according to a set program (fully automatic type). The washing machine 1 of the present embodiment does not have a drying function. Therefore, although the drying step is not performed, the washing machine 1 may be provided with a drying device so that the drying step can also be performed automatically.

The housing 10 is composed of a frame and a panel, and is formed in a box shape. A circular input port 12 opened and closed by the door 11 is formed at substantially the center of the front surface of the housing 10. Clothes are taken in and out through the inlet 12. The jet-type washing unit 7 is also taken in and out through the inlet 12. An operation unit 13 on which a monitor, a switch, and the like are arranged is installed on the upper part of the front surface of the housing 10. A controller 6 is built in behind the operation unit 13.

The tab 2 is composed of a bottomed cylindrical container capable of storing water. The tab 2 is installed inside the housing 10 with its opening laid horizontally toward the slot 12. In the washing step and the rinsing step, the washing water and the rinsing water are stored in the lower part of the tab 2.

Above the tab 2, a water supply device 21 that supplies water to the tab 2 from an external water supply source via a pipe is installed. Although not shown, the water supply device 21 is provided with a chemical tray that stores detergent and the like and sends the detergent and the like to the tab 2 together with water at the time of water supply. Further, below the tab 2, a drainage device 22 for draining unnecessary water from the tab 2 is installed.

As shown briefly in FIG. 3, the drainage device 22 includes a drainage pump 22a, a drainage path 22b, and the like. In the case of the washing machine 1, the drainage device 22 further includes a drainage bypass path 22c. One end of the drainage path 22b is connected to the lower end of the tab 2. The other end of the drainage path 22b is led out to the outside of the washing machine 1. The drainage pump 22a is installed in the middle of the drainage path 22b. The drainage pump 22a forcibly drains the water stored in the tab 2 from the washing machine 1 through the drainage path 22b according to the control of the controller 6.

One end of the drainage bypass path 22c is connected to a portion of the drainage path 22b on the upstream side of the drainage pump 22a. The other end of the drainage bypass path 22c is connected to a connection port 9 arranged in the vicinity of the inlet 12. The connection port 9 is arranged at a location accessible through the input port 12.

Further, the washing machine 1 is also provided with a water circulation mechanism that circulates the water stored in the tab 2 by injecting it into the drum 3. The water circulation mechanism includes a circulation pump 23, a circulation path 23a composed of pipes and hoses, a watering nozzle 8, and the like. The watering nozzle 8 is installed above the opening of the tab 2 with its spout facing the inside of the drum 3.

The lower end of the circulation path 23a is connected to the bottom of the tab 2, and the upper end of the circulation path 23a is connected to the watering nozzle 8. The circulation pump 23 is installed on the lower end side of the circulation path 23a. The circulation pump 23 sends the water stored in the tab 2 toward the watering nozzle 8 through the circulation path 23a under the control of the controller 6.

The drum 3 is composed of a bottomed cylindrical container having an opening 31 at one end and a bottom 32 at the other end. Most of the drum 3 is made of stainless steel plate. The drum 3 is housed in the tab 2 with its opening 31 facing the slot 12 and the bottom 32 facing rearward. The drum 3 is rotatable about a rotation axis J extending in the front-rear direction (the rotation axis J is substantially horizontal or is inclined upward toward the front).

A large number of dehydration holes 33 penetrating inside and outside are formed on the peripheral surface of the drum 3. A plurality of lifters 35 are installed inside the drum 3. Each lifter 35 is composed of a substantially columnar member having a substantially triangular cross section. The lifter 35 is installed so as to project inward from the inner peripheral surface of the drum 3 and extend in a direction parallel to the rotation axis J (rotation axis direction). The lifters 35 are arranged at substantially equal intervals in the circumferential direction.

One pulsator 4 is installed on the bottom 32 of the drum 3. The pulsator 4 is composed of a disc-shaped member having a substantially conical shape with a low crown. The diameter of the pulsator 4 is formed to be slightly smaller than the diameter of the bottom 32 of the drum 3. The surface of the pulsator 4 is provided with a plurality of (three in this embodiment) projecting portions 4a that project and extend in the radial direction.

An inner shaft 2a and an outer shaft 2b that rotate independently of each other are installed on the bottom 32 of the tab 2 (double shaft structure). The drum 3 is connected to the upper end portion of the outer shaft 2b. The pulsator 4 is connected to the upper end portion of the inner shaft 2a penetrating the bottom portion 32 of the drum 3.

As a result, the pulsator 4 and the drum 3 rotate about the rotation axis J independently of each other. The outer shaft 2b and the inner shaft 2a are connected to a motor 5 arranged on the rear side of the tab 2.

(Motor 5)
The motor 5 is composed of one stator, an inner rotor, an outer rotor, and the like arranged inside and outside the stator. Each of the inner rotor and the outer rotor is provided with permanent magnets constituting different numbers of magnetic poles. The outer shaft 2b is connected to the inner rotor. The inner shaft 2a is connected to the outer rotor.

The stator is shared by both the outer rotor and the inner rotor. That is, by inverter control, a composite current in which a current corresponding to the number of magnetic poles of each rotor is superimposed is supplied to the stator. As a result, the two rotors are configured to rotate independently of each other. The motor 5 rotates each of the drum 3 and the pulsator 4 in a predetermined direction of forward rotation or reverse rotation at a predetermined speed via each of the outer shaft 2b and the inner shaft 2a (dual rotor motor).

This motor is an example. If each of the drum 3 and the pulsator 4 can be driven independently, the drive mechanism can be selected according to the specifications. For example, each of the drum 3 and the parameter may be driven individually by two motors, or one motor in which two rotors and two stators corresponding to each of the drum 3 and the pulsator 4 are integrally configured. It may be driven.

(Controller 6)
FIG. 4 shows the relationship between the controller 6 and its main related devices. The controller 6 is composed of hardware such as a CPU, memory, and interface, and software such as a control program and data mounted on the hardware. The controller 6 is electrically connected to the operation unit 13, the motor 5, the water supply device 21, the drainage device 22, the circulation pump 23, and the like.

The controller 6 outputs a control signal to the motor 5 and the like based on the signal input from the operation unit 13, and comprehensively controls the washing machine 1. As a functional configuration, the controller 6 is provided with a normal washing processing unit 6a and a special washing processing unit 6b that control the washing machine 1.

The normal washing processing unit 6a executes the original washing processing of the washing machine for clothes. That is, a series of steps including a washing step, a rinsing step, a dehydration step, and the like are automatically operated.

For example, the normal cleaning treatment unit 6a operates the water supply device 21 in the washing step and the rinsing step, and supplies a predetermined amount of washing water or rinsing water to the tab 2. Then, the normal cleaning processing unit 6a controls the motor 5 to rotate the pulsator 4 and the drum 3 synchronously or reciprocally while switching at a predetermined timing.

After that, the drainage device 22 (drainage pump 22a) is operated to drain the water stored in the tab 2 from the tab 2. In the dehydration step, the normal cleaning processing unit 6a operates the drainage device 22 and controls the motor 5 while discharging water from the tab 2 to synchronously rotate the pulsator 4 and the drum 3 in the same direction at high speed. .. By doing so, the centrifugal force is used to dehydrate the garment.

On the other hand, the special washing processing unit 6b executes a jet-type washing process (jet-type washing process) suitable for heavily soiled clothes by using the jet-type washing unit 7.

<Jet type washing unit 7>
5, FIG. 6 and FIG. 7 show an example of the jet-type washing unit 7. The jet-type washing unit 7 is housed in the drum 3 through the inlet 12. Therefore, the length of the jet-type washing unit 7 in each of the front-rear, up-down, and left-right directions is set to be shorter than the length of the inside of the drum 3 in the front-back, up-down, and left-right directions. For convenience of explanation, the directions of the jet-type washing unit 7, that is, the front-back, left-right, and up-down directions are used with reference to the state when the washing machine 1 is mounted.

The jet-type washing unit 7 includes a water storage tank 40, an upper lid 41, a subpulsator 42, a water supply adapter 50 (water flow means), a drainage adapter 60 (second water flow means), a connecting portion 70, and the like. The jet-type washing unit 7 is connected to the pulsator 4 via the connecting portion 70. By doing so, the sub-pulsator 42 is configured to rotate in conjunction with the rotation of the pulsator 4.

The water storage tank 40 has a rectangular cuboid-shaped appearance with an open upper surface, and is configured to be capable of storing water with a front side wall 40a, a rear side wall 40b, a pair of lateral side walls, a bottom portion 40c, and the like. As shown in FIG. 7, the bottom portion 40c has a bottom surface having a substantially arcuate cross section in the front-rear direction. Support legs 40d are provided at the four corners of the bottom portion 40c.

Each of these support legs 40d has a lower end surface formed of a curved surface. These lower end surfaces are configured to come into contact with the inner peripheral surface of the drum 3 when the water storage tank 40 is placed on the inner lower side of the drum. Therefore, when the water storage tank 40 is arranged below the inside of the drum 3, the water storage tank 40 can be stably placed inside the drum 3.

The upper lid 41 has a rectangular top plate 41a and an overhanging frame 41b that projects downward from the peripheral edge of the top plate 41a. By covering the water tank 40 with the upper lid 41, the overhanging frame 41b is fitted from the outside on the four sides of the upper end of the water tank 40, and the opening of the water tank 40 is covered with the top plate 41a. A sealing material (not shown) is provided between the upper lid 41 and the water tank 40 so that the water stored in the water tank 40 does not leak to the outside by attaching the upper lid 41 to the water tank 40. It is configured. Also, although not shown, a stopper (for example, a snap lock) that can lock the upper lid 41 to the water tank 40 with one touch is provided between the upper lid 41 and the water tank 40.

Therefore, even if the jet-type washing unit 7 is housed inside the drum 3, the inside of the water storage tank 40 can be isolated from the inside of the drum 3 by attaching the upper lid 41 to the water storage tank 40. The water stored in the water storage tank 40 does not go out to the inside of the drum 3. Therefore, even if the water is contaminated by the jet-type washing process, it is possible to prevent the drum 3 from being contaminated with the water.

The top plate 41a is provided with a water supply port 41c. A water supply adapter 50 is detachably attached to the water supply port 41c. The water supply adapter 50 includes an outlet 51, a water supply hose 52, a water supply connector 53, and the like. The outlet 51 is configured so that it can be attached to the water supply port 41c by inserting it into the water supply port 41c. The insertion port 51 is provided at one end of the water supply hose 52. The water supply connector 53 is provided at the other end of the water supply hose 52, and is configured so that it can be attached to and detached from the watering nozzle 8 with one touch.

As shown in FIG. 7, a drain port 40e is provided at the lower end of the bottom surface of the water storage tank 40. A drainage adapter 60 is attached to the drainage port 40e. The drainage adapter 60 includes a drainage pipe 61, a drainage hose 62, a drainage connector 63, and the like. One end of the drainage pipe 61 is connected to the drainage port 40e. The drainage pipe 61 is provided so as to extend upward along the side surface of the water storage tank 40. The other end of the drainage pipe 61 is arranged at the upper end of the water storage tank 40 and is connected to the drainage hose 62.

The drainage connector 63 is provided at the tip of the drainage hose 62, and is configured so that it can be attached to and detached from the connection port 9 with one touch. By connecting the drainage connector 63 to the connection port 9, the drainage adapter 60 is connected to the drainage bypass path 22c. As a result, the inside of the water storage tank 40 and the upstream portion of the drainage pump 22a in the drainage path 22b communicate with each other.

A stopper 43 made of an elastic material such as rubber is provided on the front surface of the front side wall 40a. The stopper 43 is installed at a position where the insertion port 12 is in contact with the closed door 11.

As shown in FIG. 7, a subpulsator 42 is installed on the lower front side of the rear side wall 40b. The sub-pulsator 42 is composed of a pulsator having a smaller diameter than the pulsator 4. That is, the subpulsator 42 is composed of a substantially conical disk-shaped member having a low crown, and a plurality of (three in the present embodiment) protruding portions extending in the radial direction are provided on the surface thereof. .. The subpulsator 42 is rotatably supported on the rear side wall 40b. The surface of the subpulsator 42 faces the inside of the water tank 40.

As shown in FIGS. 5 and 6, the connecting portion 70 is arranged on the upper rear side of the rear side wall 40b. The connecting portion 70 has a substantially disk-shaped boss fitting portion 71 and a pulley (drive pulley 72) provided coaxially with the boss fitting portion 71 on the front side of the boss fitting portion 71. The connecting portion 70 is pivotally supported by the rear side wall 40b in a rotatable state.

On the rear side of the boss fitting portion 71, a recess 71a corresponding to the uneven shape of the crown portion of the pulsator 4, that is, the central portion of the surface of the pulsator 4 is formed. Therefore, if the rear side of the boss fitting portion 71 is fitted to the crown portion of the pulsator 4, the connecting portion 70 is coaxially connected to the pulsator 4 and rotates integrally with the pulsator 4. That is, the rotational power of the pulsator 4 can be transmitted to the jet-type washing unit 7 via the connecting portion 70.

A driven pulley 73 is arranged on the lower rear side of the rear side wall 40b so that the center of rotation is linearly aligned with the drive pulley 72 in the vertical direction. The driven pulley 73 is attached to the end of the shaft of the subpulsator 42 that protrudes rearward from the rear side wall 40b. An annular belt 74 is hung on these pulleys 72 and 73.

As a result, these pulleys 72 and 73 rotate in conjunction with each other via the belt 74. That is, the rotational force of the pulsator 4 is transmitted to the sub pulsator 42 via the drive pulley 72, the driven pulley 73, and the belt 74 (rotational force transmission mechanism). As a result, the sub-pulsator 42 rotates in conjunction with the pulsator 4.

Since the rotational force transmission mechanism is configured with the minimum necessary and simple members as described above, the structure of the jet type washing unit 7 can be simplified. Manufacturing costs can also be suppressed. Moreover, since the drive pulley 72 and the driven pulley 73 are installed on the same rear side wall 40b of the water storage tank 40, the structure is further simplified.

Then, the drive pulley 72 and the driven pulley 73 are arranged so that the rotation centers are arranged in a straight line in the vertical direction, and the subpulsator 42 is located below the water tank 40 at a position lower than the connecting portion 70. A sub-pulsator 42 is arranged in. By arranging the connecting portion 70 above the water storage tank 40, the rotation centers of the connecting portion 70 and the pulsator 4 can be aligned.

By arranging the subpulsator 42 below the water storage tank 40, the subpulsator 42 can be arranged below the surface of the water even with a small amount of water stored. Even if the size of the subpulsator 42 is increased, the subpulsator 42 can be arranged under the water surface. If the subpulsator 42 is placed below the surface of the water, the stirring performance of the water is enhanced, so that the washing effect is improved.

The pulley ratios of the drive pulley 72 and the driven pulley 73 are different. For example, in the case of the washing machine 1, the driven pulley 73 has a smaller diameter than the drive pulley 72. As a result, the sub-pulsator 42 rotates at a higher rotation speed than the pulsator 4. As a result, the motor 5 can be driven efficiently.

The drive pulley 72 having a relatively large diameter is made of a synthetic resin material. The driven pulley 73 having a relatively small diameter is made of a metal material. If it is a synthetic resin material, it can be made lighter even if it is large. If it is a metal material, bending can be suppressed even if it is small.

As shown in FIG. 8, the jet-type washing unit 7 configured in this way is housed inside the drum 3 through the input port 12 when the special washing process is executed, and the drum 3 is connected to the pulsator 4. It is placed on the lower side inside. At this time, since the lower end surface of the support leg 40d of the water storage tank 40 is in close contact with the inner peripheral surface of the drum 3, it can be stably placed inside the drum 3.

The upper surface of the water storage tank 40 is covered with an upper lid 41. The outlet 51 of the water supply adapter 50 is attached to the water supply port 41c, and the water supply connector 53 is connected to the watering nozzle 8. The drainage connector 63 of the drainage adapter 60 is connected to the connection port 9. As a result, the inside of the water tank 40 is completely isolated from the inside of the drum 3.

Then, the jet-type washing unit 7 is pushed into the back of the drum 3. At that time, the recess 71a of the boss fitting portion 71 and the crown portion of the surface of the pulsator 4 are aligned with each other (specifically, the position of each protruding portion 4a) to fit them. By doing so, the connecting portion 70 is connected to the pulsator 4. When the door 11 is closed, the door 11 comes into contact with the stopper 43, the jet-type washing unit 7 is pushed in, and the connecting portion 70 is pressed against the pulsator 4.

Therefore, the connecting portion 70 can be connected to the pulsator 4 in a detachable state by simply accommodating the drum 3 and closing the door 11, and while maintaining these fittings, a jet type in the front-rear direction. The movement of the washing unit 7 can be regulated. Since the structure of the existing washing machine 1 is used as it is, it is not necessary to separately provide a mechanism for connecting or fixing the jet type washing unit 7 to the pulsator 4 or the drum 3.

<Jet-type washing process>
In the washing machine 1, the special washing processing unit 6b provided in the controller 6 is configured to execute the jet-type washing process by utilizing the jet-type washing unit 7.

(Drum 3 rotation regulation)
In the jet washing process, a washing step and / or a rinsing step is performed, and a dehydration step is not performed. Then, in the washing step or the like, in order to rotate the sub-pulsator 42 of the jet-type washing unit 7, only the pulsator 4 is rotationally driven, and the drum 3 is not rotationally driven. The rotation of the drum 3 is restricted at a predetermined position.

(Mechanical regulatory means)
In the case of the washing machine 1, the rotation regulation of the drum 3 is configured to be enforced by mechanical means. Specifically, a rotation regulating means capable of mechanically engaging the tab 2 and the drum 3 is provided. Then, by operating the rotation regulating means, the rotation of the drum 3 is regulated.

FIG. 9 shows an engaging pin 80 as an example of the rotation regulating means. The engagement pin 80 is provided between the flange portion 31a extending along the peripheral edge of the opening 31 of the drum 3 and the opposing flange portion 2a of the tab 2 facing the flange portion 31a. The engagement pin 80 is supported by a support member 81 attached to the flange portion 31a so as to project toward the corresponding flange portion 31a.

A recess 82 is formed at a predetermined position of the facing flange portion 2a. By pushing the engaging pin 80 in a state where the engaging pin 80 and the recess 82 are aligned, the engaging pin 80 protrudes from the support member 81 and its tip enters the recess 82. As a result, the rotation of the drum 3 is restricted at a predetermined position.

The recess 82 is not essential. By pushing the engaging pin 80, the tip of the engaging pin 80 may be brought into pressure contact with the facing flange portion 2a. An engaging hole into which the engaging pin 80 can be inserted is formed in the flange portion 31a, and the tip of the engaging pin 80 inserted into the engaging hole is inserted into the recess 82 in a state where the engaging hole and the recess 82 are aligned. You may do so. In short, the rotation regulating means only needs to be able to hold the drum 3 in a predetermined position during the jet washing process.

The engaging pin 80 may be pushed in and pulled out manually, or may be automatically controlled by the controller 6. In this washing machine 1, the case where the engaging pin 80 is pushed in and pulled out manually is illustrated.

(Electrical regulatory means)
If each rotor of the motor 5 is controlled by an individual inverter, or if the drum 3 is driven by a dedicated motor (drum motor) separately from the drive of the pulsator 4, the rotation of the drum 3 is restricted. May be configured to be performed by electrical means.

For example, in the former case, the inverter that supplies the current to the inner rotor that rotates the drum 3 is controlled, and the three-phase current is supplied so that the rotational force is not generated. That way, the inner rotor will not rotate. Therefore, the rotation of the drum 3 can be regulated.

Further, short-circuit brake control may be used. That is, so-called short-circuit brake control, in which the rotation of the motor is braked by controlling the switching circuit of the inverter to cut off the energization of the motor, is generally performed to shorten the dehydration time (short-circuit brake control is used). Since it is a known technique, its description is omitted).

Specifically, when the special cleaning process is executed, the short-circuit brake control is executed for the inverter that supplies the current to the inner rotor. By doing so, the energization of the inner rotor is cut off, and the inner rotor is in a state of being electrically disconnected. Therefore, the inner rotor does not rotate, and the rotation is suppressed by the action of the permanent magnets installed in the inner rotor. Therefore, the rotation of the drum 3 can be regulated.

In the latter case, the rotation of the drum 3 can be stopped by stopping the operation of the drum motor. The inverter of the drum motor may be controlled by a short-circuit brake to regulate the rotation of the drum 3.

(Jet-type washing method using jet-type washing unit 7)
Hereinafter, jet-type washing using the jet-type washing unit 7 will be described. The washing method mainly consists of three steps, and these three steps are executed in the washing step or the rinsing step in the jet type washing process.

That is, the washing method includes a first step of accommodating the jet-type washing unit 7 in the drum 3 through the inlet 12 and fixing it to the inner lower side of the drum 3 so as to be connected to the pulsator 4, and water in the water storage tank 40. It is configured to include a second step of storing the drum 3 and a third step of rotating the sub-pulsator 42 by rotating the pulsator 4 in a state where the rotation of the drum 3 is restricted.

The first step is mainly performed by the user. The second step and the third step are executed by the washing machine 1 (controller 6). FIG. 10 shows a flow of a series of processes including these steps. FIG. 11 shows the main state of the washing machine 1 in the process of these treatments.

A user who wants to wash heavily soiled clothes or laundry such as pet supplies and cloth diapers that he / she wants to wash separately from ordinary clothes (hereinafter, these are simply referred to as special laundry 100) operates the operation unit 13 to operate the operation unit 13. The operation mode (special washing mode) for executing the jet-type washing process is selected, and the operation of the washing machine 1 is started. As a result, in the washing machine 1, a signal instructing the operation of the special washing mode is input to the controller 6 from the operation unit 13. When washing with water, it may be left as it is, but when using detergent or the like, the detergent or the like is put into the chemical tray in advance.

The controller 6 determines whether or not the operation of the special cleaning mode has been started based on the signal input from the operation unit 13 (step S1). Then, when it is determined that the operation of the special cleaning mode has been started, the jet-type washing process is started by the special cleaning processing unit 6b of the controller 6.

When the jet-type washing process is started, the controller 6 first urges the user to restrict the rotation of the drum 3, that is, to push the engaging pin 80 through the monitor of the operation unit 13. At the same time, the controller 6 prompts the user to execute the first step, that is, to attach the jet-type washing unit 7 to the inner lower side of the drum 3 through the monitor of the operation unit 13 (step S2).

Accordingly, the user rotates the drum 3 to align the engaging pin 80 and the recess 82, and then pushes the engaging pin 80 into the recess 82. As a result, the drum 3 is fixed in a predetermined position.

The user also puts the special laundry 100 inside the water tank 40 outside the washing machine 1, covers the upper lid 41, and locks the laundry. In such a state, the jet-type washing unit 7 is installed on the inner lower side of the drum 3 as described above. Therefore, there is no possibility that the inside of the drum 3 will be contaminated with the special laundry 100.

Then, the user closes the door 11. As a result, as described above, the jet-type washing unit 7 is firmly connected to the pulsator 4, and the movement in the front-rear direction is restricted. Then, the user operates a button or the like displayed on the monitor of the operation unit 13 to input a processing completion command to the controller 6.

When the processing completion command is not input for a predetermined period (No in step S3) or the door 11 is not closed for a predetermined period (No in step S4), the controller 6 notifies the user of the abnormality by an alarm or the like. (Step S15). Then, the special washing mode is terminated without performing the jet-type washing process.

On the other hand, when the command to complete the process is input and it is determined that the door 11 is closed, the controller 6 starts the jet-type washing process. That is, the special cleaning treatment unit 6b starts the water storage treatment by operating the water supply device 21 and the circulation pump 23 (step S5).

As a result, first, water is supplied to the inside of the tab 2 by the water supply device 21. Then, the water stored in the lower part of the tab 2 is sent by the circulation pump 23, and is charged into the inside of the water storage tank 40 from the watering nozzle 8 through the water supply adapter 50 as shown in FIG. 11A.

The water supply amount is set in the controller 6 in advance. In the jet-type washing process, jet-type washing is performed using the water stored in the water storage tank 40. Therefore, the amount of water supplied in the jet-type washing process is usually larger than that in the normal washing process using the drum 3.

Although it depends on the amount of the special laundry 100, in order to effectively agitate the water, it is necessary to supply at least an amount of water that is flooded by most of the subpulsator 42. Considering the cleaning effect on the special laundry 100, as shown in FIG. 11B, it is preferable to supply the water storage tank 40 with the maximum amount of water that can be stored. Then, even if the special laundry 100 is heavily soiled, the stains can be easily transferred to water, so that the stains can be easily removed.

The controller 6 determines whether or not the water supply amount has reached the set water amount W0 (step S6), and if it determines that the water supply amount has reached (Yes in step S6), the controller 6 stops the water supply and drives the motor 5. Then, the rotation of the pulsator 4 is started (step S7).

The rotation of the drum 3 is restricted by the connection between the engaging pin 80 and the recess 82. As a result, the jet-type washing unit 7 is fixed to the inner lower side of the drum 3. In such a state, the sub-pulsator 42 rotates together with the pulsator 4, and the jet-type washing process is started.

As the subpulsator 42 rotates, the water stored in the water tank 40 and the special laundry 100 are agitated. Unlike the washing with a small amount of water, the washing is done in the same way as a vertical washing machine. Therefore, even if the special laundry 100 is heavily soiled, the amount of water is large, so that the stains can be effectively removed by a single treatment. Since the inside of the water storage tank 40 is isolated from the inside of the drum 3, there is no possibility that the inside of the drum 3 becomes dirty.

At this time, the rotation of the pulsator 4 and the sub pulsator 42 may be in a fixed direction, but as shown in FIG. 11 (c), it is preferable to invert them alternately. In particular, it is more preferable to rotate alternately in both the forward rotation direction and the reverse rotation direction at the same time. Specifically, the controller 6 controls the drive of the motor 5 so that the pulsator 4 and the sub pulsator 42 rotate alternately in both the forward rotation direction and the reverse rotation direction in a short time.

By reversing the rotation direction of the subpulsator 42, the stirring action is promoted and the cleaning effect can be improved.

When the controller 6 determines that the preset processing time T0 has been reached (Yes in step S8), the controller 6 stops the rotation of the pulsator 4 and stops the jet-type washing process (step S9).

Then, the controller 6 executes the wastewater treatment. That is, the drainage device 22, specifically, the drainage pump 22a is operated to start the process of draining water from the water storage tank 40 (step S10). By the operation of the drainage pump 22a, the upstream side of the drainage pump 22a in the drainage path 22b becomes a negative pressure, and the water accumulated in the lower part of the tab 2 is drained. At the same time, the water inside the water storage tank 40 is also drawn in and drained through the drainage adapter 60 and the drainage bypass path 22c.

Then, when the controller 6 determines that the predetermined time T1 for completing the drainage has elapsed (Yes in step S11), the controller 6 stops the drainage and notifies the user that the operation has been completed by an alarm or the like (step S12).

At the same time, the controller 6 urges the user to release the rotation restriction of the drum 3, that is, to pull out the engaging pin 80 through the monitor of the operation unit 13. At the same time, the controller 6 prompts the user to take out the jet-type washing unit 7 from the inside of the drum 3 through the monitor of the operation unit 13 (step S13).

Accordingly, the user pulls out the engaging pin 80 from the recess 82. As a result, the rotation restriction is released and the drum 3 becomes rotatable. The user also removes the jet-type washing unit 7 from the drum 3. At this time, the processed special laundry 100 may be taken out inside the drum 3, but the special laundry 100 may be taken out by opening the upper lid 41 after taking out from the drum 3. By doing so, it is possible to more reliably prevent the inside of the drum 3 from being soiled.

Finally, if the user operates a button or the like displayed on the monitor of the operation unit 13 and inputs a processing completion command to the controller 6, the series of jet-type washing processing is completed (Yes in step S14). ).

On the other hand, when the processing completion command is not input for a predetermined period (No in step S14), the controller 6 notifies the user of the abnormality by an alarm or the like (step S15).

The user may perform the jet-type washing process a plurality of times. Further, in the case of washing by adding a detergent, in order to further perform the rinsing treatment by washing with water, it is preferable to subsequently carry out the jet-type washing treatment with only water. The washing machine 1 may be provided with a chemical washing mode so that the special washing processing unit 6b continuously executes the washing step and the rinsing step.

The form of the jet type washing unit 7 can be appropriately changed according to the specifications. For example, the top lid 41 is not essential. Without the top lid 41, the inside of the drum 3 may become dirty, but the jet-type washing process can be performed.

The water supply adapter 50 (water flow means) and the drainage adapter 60 (second water flow means) are also not essential. For example, of the jet-type washing unit 7 described above, only basic parts such as a water storage tank 40 and a subpulsator 42 may be used. In this case, the user needs to supply and drain water to the water storage tank 40, but the jet-type washing process can be performed without the water circulation mechanism.

Instead of the drainage adapter 60 (second water passage means), a hose may simply be attached to the drainage port 40e of the water storage tank 40. In this case, water can be stored by the user holding the tip end side of the hose in the upper part of the water storage tank 40 before starting the jet-type washing process. Then, after the jet washing process is completed, the user can drain the hose by inserting the tip of the hose into the lower part of the tab 2.

1 Washing machine 2 Tab 3 Drum 4 Pulsator 4a Protruding part 5 Motor 6 Controller 6a Normal washing processing part 6b Special washing processing part 7 Spout type washing unit 8 Watering nozzle 9 Connection port 10 Housing 11 Door 12 Input port 13 Operation part 21 Water supply Device 22 Drainage device 23 Circulation pump 33 Dehydration hole 35 Lifter 40 Water storage tank 42 Subpulsator 50 Water supply adapter (water flow means)
60 Drainage adapter (second water flow means)
70 Connecting part 72 Drive pulley (rotational force transmission mechanism)
73 Driven pulley (rotational force transmission mechanism)
74 belt (rotational force transmission mechanism)
80 Engagement pin 100 Clothing (special laundry)
J rotation axis

Claims (15)

It is a drum-type washing machine that can perform jet-type washing.
A housing with a slot on the front and
A tab that can store water installed inside the housing and
With the opening facing the slot, the drum rotatably housed in the tab and
A water supply device that supplies water to the tab and
A drainage device that drains water from the tab and
A pulsator that is installed at the bottom of the drum and can rotate independently of the drum.
A control device that controls the operation of the water supply device and the drainage device, and also controls the rotation of the drum and the pulsator.
A jet-type washing unit configured to be accommodated in the drum through the inlet and to be connected to the pulsator.
With
The jet-type washing unit is
A water tank that can store water and
A subpulsator rotatably installed on the side of the water tank,
A rotational force transmission mechanism that transmits the rotational force of the pulsator to the subpulsator,
Have,
The control device has a special cleaning processing unit that executes jet-type washing using the jet-type washing unit.
With the jet-type washing unit arranged below the inside of the drum so as to be connected to the pulsator.
The special cleaning processing unit
Water storage treatment that operates the water supply device to store water in the water tank,
A jet-type washing process in which the sub-pulsator is rotated by rotating the pulsator while the rotation of the drum is restricted.
A drum-type washing machine that runs. In the drum-type washing machine according to claim 1,
A rotation regulating means is provided between the tab and the drum so that they can be mechanically engaged with each other.
A drum-type washing machine in which the rotation of the drum is regulated by the rotation regulating means. In the drum-type washing machine according to claim 1,
A motor for rotationally driving the drum is further provided.
A drum-type washing machine in which the rotation of the drum is regulated by electrically controlling the motor. In the drum-type washing machine according to claim 1,
A drum-type washing machine in which the special washing processing unit rotates the subpulsator in both the forward rotation direction and the reverse rotation direction in the jet-type washing process. In the drum-type washing machine according to claim 1,
The jet-type washing unit has a connecting portion that is connected to the pulsator by being detachably fitted to the surface of the pulsator.
A drum-type washing machine in which the rotational power of the pulsator is transmitted to the jet-type washing unit via the connecting portion. In the drum type washing machine according to claim 5.
The jet-type washing unit arranged on the lower side inside the drum is pushed by the door that closes the inlet, so that the state in which the connecting portion is fitted to the surface of the pulsator is maintained. Type washing machine. In the drum type washing machine according to claim 6.
The rotational force transmission mechanism has a drive pulley provided coaxially with the connecting portion, a driven pulley provided coaxially with the subpulsator, and a belt spanned with the drive pulley and the driven pulley. A drum-type washing machine. In the drum type washing machine according to claim 7.
A drum-type washing machine in which the drive pulley and the driven pulley are installed on the same side wall of the water storage tank, and the subpulsator is arranged at a position lower than the connecting portion. In the drum-type washing machine according to claim 1,
Further provided with a water circulation mechanism for circulating water stored in the tab by injecting it from a nozzle into the inside of the drum.
The jet-type washing unit has a water passage means that can be connected to the nozzle.
A drum-type washing machine in which the special cleaning treatment unit operates the water circulation mechanism to supply water to the water storage tank through the nozzle and the water passage means when the water storage treatment is executed. In the drum-type washing machine according to claim 9.
The drainage device includes a drainage pump that drains water stored in the tab, and a drainage bypass path in which one end is connected to a portion of the drainage path on the upstream side of the drainage pump and the other end is arranged in the vicinity of the inlet. Have and
The jet-type washing unit has a second water passage means that can be connected to the drainage bypass path.
A drum-type washing machine in which the special cleaning treatment unit operates the drainage pump to drain water from the water storage tank through the second water passage means and the drainage bypass path when the wastewater treatment is executed. A jet-type washing method using a drum-type washing machine equipped with a pulsator that can rotate independently of the drum.
A jet-type washing unit having a sub-pulsator configured to be rotatable in conjunction with the rotation of the pulsator on the side surface of the water tank is housed in the drum through the inlet, and the drum is connected to the pulsator. The first step of fixing to the lower side inside and
The second step of storing water in the water tank and
The third step of rotating the sub-pulsator by rotating the pulsator in a state where the rotation of the drum is restricted,
Jet-type washing methods, including. In the jet-type washing method according to claim 11,
In the first step, a jet-type washing unit is pressed against the pulsator by a door that closes the inlet, and is fixed to the inner lower side of the drum so as to be connected to the pulsator. .. In the jet-type washing method according to claim 11,
A jet-type washing method in which the pulsator is rotated in both the forward rotation direction and the reverse rotation direction in the third step. In the jet-type washing method according to claim 11,
A jet-type washing method in which water is supplied to the water storage tank by using the water circulation mechanism provided in the drum-type washing machine in the second step. A jet-type washing unit for drum-type washing machines that has a pulsator that can rotate independently of the drum at the bottom of the drum.
A jet-type washing unit that is arranged in a state of being connected to the pulsator on the inner lower side of the drum whose rotation is restricted during washing.

Images