JPH07231994A - Drum type washing machine - Google Patents

Abstract

(57) [Summary] [Purpose] To effectively use the cleaning liquid to enhance the cleaning power. [Constitution] The baffle 21 is rotated by rotating the drum 2 at a low speed.
The laundry S is scraped up and dropped. The cleaning liquid is sprayed toward the laundry S from one spray nozzle 5 of the spray nozzles 5 arranged in two rows according to the rotation direction of the drum 2.
The cleaning liquid passes through the hole 1 on the peripheral wall of the drum and hits the laundry S. The laundry S is not entangled and is uniformly washed by tumbling and spraying the washing liquid. The cleaning liquid accumulated in the tank 32 from the drum 2 through the drainage pipe 41 is guided to the injection nozzle 5 by the supply pump 33 and is injected again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type washing machine in which laundry is housed in a rotationally driven drum for washing, rinsing and dehydrating (sometimes further drying).

[0002]

2. Description of the Related Art In a conventional drum type washing machine, a drum is rotated around a horizontal axis in a water tub to wash and rinse laundry by tumbling to dehydrate the laundry. A washing machine of this type, which enables efficient washing with a small amount of water, is disclosed in Japanese Patent Laid-Open No. 58-13089. According to this, in order to spray the concentrated aqueous liquid cleaning liquid and the aqueous liquid rinsing liquid onto the laundry, a spray nozzle is provided at the inlet opening of the fixed drum, and the cleaning liquid and the rinse liquid are introduced from the spray nozzle to the laundry in the movable drum. Is to be sprayed.

[0003]

When the spray nozzle is provided at the inlet opening of the fixed drum as described above, there is a drawback that the laundry is caught by the spray nozzle when the laundry is taken in and out. Therefore, if the spray nozzle is provided so as not to project, the laundry is prevented from being caught, but the direction in which the cleaning liquid is sprayed is restricted, and the area that hits the laundry is narrowed. As a result, there is a problem that sufficient cleaning power cannot be obtained and uneven cleaning occurs. Further, in the above-mentioned conventional technique, the cleaning liquid used at the time of washing is discharged from the lowest part of the fixed drum and is made to flow into the sewage, so it cannot be said that water saving is effectively performed.

In view of the above, an object of the present invention is to provide a drum type washing machine which efficiently injects a cleaning liquid to uniformly wash laundry, and effectively uses the cleaning liquid.

[0005]

As shown in FIGS. 1 and 2, a means for solving the problems according to the present invention is to spray a washing liquid on a laundry S in a drum 2 and wash it with a baffle 21 in the drum 2 by tumbling. In the drum type washing machine, a plurality of injection nozzles 5 for injecting a washing liquid from the outer circumference of the drum 2 toward the center are provided in the water tub 3, and only the injection nozzles 5 in a predetermined area are selectively operated. The injection device 6 is provided. That is, the injection nozzle 5 is connected to the drum 2
On the other hand, they are arranged on the right side and the left side, and when the drum 2 rotates to the right, the right injection nozzle 5 injects, and when it rotates to the left, the left injection nozzle 5 injects.

A plurality of holes 1 elongated in the circumferential direction are arranged in parallel on the peripheral wall of the drum 2, and the holes S are sucked and dehydrated from the laundry S in the drum 2 through the holes 1 so as to be in close contact with the outer surface of the drum 2. A suction body 50 for performing the above is provided. Further, a circulation means for collecting the washing liquid from the water tank 3 and guiding it to the jet nozzle 5 again is provided, and the circulation means is provided with a defoaming device 63 for suppressing foaming of the washing liquid.

As another means for solving the problems, FIGS.
As described above, the spray nozzles 70 are respectively disposed on the plurality of baffles 21 formed on the inner peripheral wall of the drum 2, and the rotation of the drum 2 causes the spray nozzles 70 disposed in the predetermined baffles 21 to wash from the spray nozzles 70. The injection switching control is performed so as to eject the liquid. Then, the flow path 75 to the injection nozzle 70 of the washing liquid is provided with the horizontal shaft 23 of the drum 2.
It is formed in a concentric cylindrical shape and is water-tightly and rotatably connected to an external flow path 74 communicating with the flow path 75 via a sliding member 78.

Further, the motor for driving the drum 2 to rotate and the motor for driving the pump 33 of the circulation means are shared by one motor, and when the drum 2 rotates in one direction, the injection device 6 is actuated in the other direction. During the rotation, the injection control is performed so that the injection device 6 is not operated, and the rotation of the drum 2 in one direction is made larger than the rotation in the other direction.

[0009]

In the above means for solving the problems, when the laundry S is scraped up and dropped by the rotation of the drum 2, the washing liquid is intensively directed from the predetermined injection nozzle 5 corresponding to the rotation direction toward the center of the drum 2. Is jetted. For example, when the drum 2 is rotating to the right, the washing liquid is jetted from the jet nozzle 5 on the right side, the jet pressure is increased, and a strong washing power is obtained. Then, when the laundry S is scraped up by the drum 2 and falls, the washing liquid jetted from the jet nozzle 5 hits, and when the drum 2 rotates counterclockwise, the washing liquid jets from the left jet nozzle 5. To be done. In this way, the laundry S
Is agitated to reduce the entanglement of the cloth, the washing liquid permeates into the laundry S uniformly, and uneven washing is eliminated. In particular,
When the injection nozzle 70 is provided on the baffle 21 of the drum 2,
It will surely hit the laundry, resulting in efficient jetting. Further, when the washing liquid is sprayed from the outside of the drum 2, since the hole 1 of the drum 2 is elongated in the circumferential direction, the washing liquid passes through the hole 1 of the drum 2 regardless of the rotation of the drum 2. The washing liquid can be effectively used.

Then, the washing liquid accumulated in the drum 2 is recovered from the drum 2 by the circulation means, guided to the injection nozzle 5, and injected again. Bubbles existing in the liquid during this circulation are eliminated by the defoaming device 63, and the pump of the circulation means can be efficiently circulated while preventing a decrease in efficiency.

When the washing and rinsing are completed, the suction member 50 which is in close contact with the drum 2 sucks the air in the drum 2 through the hole 1. At this time, the water contained in the laundry S is sucked into the suction body 50 together with the air, and the laundry S is dehydrated.

[0012]

【Example】

(First Embodiment) As shown in FIG. 1, the drum type washing machine of the first embodiment rotatably supports a drum 2 having a plurality of holes 1 in a peripheral wall for accommodating the laundry S and the drum 2. Aquarium 3
And a driving device 4 for rotating the drum 2 in the forward and reverse directions, and the drum 2
A plurality of injection nozzles 5 for injecting a washing liquid (cleaning liquid or rinsing liquid) in the direction from the outer periphery to the center of the same and an injection device 6 for operating the injection nozzles 5 are provided.

The water tub 3 is in the form of a horizontal cylinder having a laundry inlet / outlet 7 formed on the front surface thereof. The upper surface of the water tub 3 is suspended from a washing machine body 8 by a spring and the lower surface thereof is supported by a damper. With these, the water tank 3 is held and the vibration of the water tank 3 is damped. Further, a weight is attached to the water tank 3 to reduce vibration when the drum rotates. Further, legs 9 are attached to the four corners of the bottom surface of the washing machine body 8 to block the conduction of vibration to the floor and the like. An opening 10 communicating with the laundry entrance / exit 7 is formed on the front surface of the washing machine body 8, and a lid 11 for sealing the laundry entrance / exit 7 is openably / closably attached.

The drum 2 is formed in a cylindrical shape having an opening 20 on the front surface, and as shown in FIG. 3, the hole 1 formed in the peripheral wall thereof has a ratio of the short side to the long side of 1: 8. The shape is elongated in a certain circumferential direction, and both ends in the circumferential direction are arcuate, and the holes 1 prevent the fingers and the laundry from being damaged. The holes 1 are regularly arranged in the circumferential direction and the axial direction, but the holes 1 are not formed in the peripheral edge of the peripheral wall. Further, as shown in FIG. 2, three baffles 21 are formed on the inner peripheral wall of the drum 2 at equal intervals in parallel to the axial direction, and holes 1 are formed in the peripheral wall corresponding to the back surface of the baffle 21 and its periphery. The non-perforated portion 22 is not formed. In this embodiment, the holes 1 are not formed on the front surface and the rear surface of the drum, but they may be formed on these surfaces.

A horizontal shaft 23 is fixed to the rear surface of the drum 2. The horizontal shaft 23 penetrates through the rear wall of the water tank 3 and is rotatably supported by bearings 24. It is installed. A motor 26 capable of rotating in the forward and reverse directions is attached to the lower surface of the water tank 3, and a motor pulley 28 is attached to an output shaft 27 of the motor 26. The motor pulley 28 and the drive pulley 25 are connected by a drive belt 29. That is, the power for rotating the drum 2 is generated by the output shaft 27 of the motor 26, the motor pulley 28,
It is transmitted to the horizontal shaft 23 via the drive belt 29 and the drive pulley 25, and these constitute the drive device 4.

The jet nozzles 5 are mounted in two symmetrical positions on the upper portion of the water tank 3 so as to penetrate the water tank 3, and four jet nozzles 5 are arranged in a line in the axial direction. The ejection direction of the ejection nozzle 5 is directed toward the center of the drum 2. The injection device 6 is provided with each injection nozzle 5
It is composed of a liquid supply pipe 31 connected to, a tank 32 for storing the washing liquid, and a supply pump 33 which pressurizes the washing liquid from the tank 32 and sends it to the liquid supply pipe 31. The supply pump 33 is driven by a motor different from the motor 26 of the drive device 4, and a water shutoff valve 35 is provided in a connection pipe 34 that connects the tank 32 and the supply pump 33. The liquid supply pipe 31 is branched into two in front of the injection nozzle 5, the branch pipe 36 communicates with each row of the injection nozzle 5, and the branch pipes 36 are respectively provided with electromagnetic valves 37a and 37b. ing.

A drain port 4 formed on the lower surface of the water tank 3
0 and the tank 32 are provided with a drainage pipe 41, and a water shutoff valve 42 is provided in the drainage pipe 41 to constitute a circulation means for circulating the washing liquid together with the injection device 6. The tank 32 is connected to a drain hose 44 in which a drain valve 43 is interposed, and the drain valve 4 of the drain hose 44 is connected.
The connection pipe 34 is branched from the upstream side of 3.
A water supply pipe 46 in which a water supply valve 45 is interposed is connected to the upper part of the water tank 3 and is connected to the water supply.

The drum type washing machine of this embodiment is designed to perform dehydration without rotating the drum 2 at a high speed, and the suction body 50 which covers the outer peripheral wall of the drum 2 and communicates with the hole 1 of the drum 2. And the laundry S in the drum 2 from the suction body 50
And a suction device 51 for sucking and dehydrating the water. The suction body 50 is arranged between the drum 2 and the water tank 3 and is made of an elastic and airtight material, for example, rubber or plastic, and has a size enough to cover a third of the peripheral wall of the drum 2. It has a plate-like shape, and a sealing material 52 that is in close contact with the drum 2 is attached to the periphery thereof. Also, the suction body 5
0 is provided with a suction port 53 and a suction pipe 54 is connected thereto. The suction pipe 54 penetrates the water tank 3 and is connected to the drain pipe 41 downstream of the water shutoff valve 42. Here, the holes 1 of the drum 2 are not formed in a mesh shape, and a large number of holes are regularly arranged so that the strength of the drum 2 is maintained and the airtightness with the suction body 50 is not impaired. This is because

The suction device 51 is separated from the suction pump 55 which sucks air from the inside of the drum 2 via the suction body 50, and the tank 32 which separates the moisture and air of the laundry S from the sucked air. And a circulation pipe 56 that re-directs air to the water tank 3. The circulation pipe 56 is connected to the exhaust side of the suction pump 55, and is formed in the upper portion of the water tank 3 to form the outlet port 5.
It communicates with 7. As a result, the air containing water sucked from the drum 2 by the suction pump 55 is separated into water and air in the tank 32 through the suction body 50, the suction pipe 54, and the drainage pipe 41, and the separated air is sucked. The pump 55 is cooled to become warm air, which is circulated from the outlet 57 through the circulation pipe 56 into the water tank 3. An air hole 58 is provided above the water tank 3 so that the inside of the water tank 3 does not become a negative pressure. When a drying function is added, a heater is provided in the middle of the circulation pipe 56 to heat the passing air and blow out warm air, so that the drying can be performed faster.

A heater 60, which is a heater for heating the washing liquid, particularly the washing liquid, is attached to the branch pipe 36. When the cleaning liquid is heated to about 40 degrees, the cleaning power is effectively exerted. Therefore, when the laundry is heavily soiled, the cleaning liquid is heated to enhance its cleaning effect.
Since it is arranged near the spray nozzle 5, only the cleaning liquid to be sprayed can be heated, and the heating efficiency can be improved.

In the middle of the drain pipe 41, a thread waste filter 61 for removing thread waste from the washing liquid is detachably provided, and the thread waste filter 6 is provided on the front surface of the washing machine body 8.
An outlet 62 for removing 1 is formed. The lint filter 61 is a bag made of fine fibers and is inserted so as to close the inside of the drainage pipe 41.
As a result, thread wastes and large dusts are removed from the liquid drained from the water tank 3, and these do not get entangled or clogged with the supply pump 33, and it is possible to prevent the performance of the supply pump 33 from deteriorating. If the thread waste filter 61 is regularly removed and cleaning is performed, high-pressure jetting of the cleaning liquid can be maintained, and a decrease in cleaning power can be prevented.

Further, the tank 32 is provided with a defoaming device 63 for suppressing foaming of the washing liquid. Defoaming device 63
As for, as attached to the side surface, bottom surface or top surface of the tank 33, those that heat and break the bubbles, those that irradiate ultrasonic waves with a frequency of 20 kHz to break the bubbles, and the defoaming agent such as silicone are dripped. It consists of one of those that can be defoamed. The defoaming device 63 eliminates bubbles in the tank 32, suppresses suction of bubbles into the supply pump 33, and prevents the supply pump 33 from deteriorating its performance. This enables efficient circulation of the cleaning liquid.

In the washing machine constructed as described above, washing,
The drive unit 4, the injection unit 6, the suction unit 51 and the respective valves are drive-controlled by a control unit composed of a microcomputer in accordance with each process of rinsing and dehydration, and operation keys of an operation panel provided on the outer surface of the washing machine body 8. Each process is executed based on the input from the sensor and the output signals of the temperature sensor, the dirt sensor, and the like. The control device has a function of rotating the motor 26 in the forward and reverse directions to rotate the drum 2 in the forward and reverse directions during washing and rinsing, and from the injection nozzle 5 on the left side when the drum 2 rotates to the left (normal rotation) and to the right side when rotating to the right (reverse rotation). Each of the solenoid valves 37a, 37 so that the cleaning liquid is jetted from the jet nozzle 5
It has a function of operating b and a function of injecting a cleaning liquid or a rinsing liquid at a high pressure while rotating the drum 2 at a rotation speed of 20 rpm or more and 45 rpm or less, which is lower than a normal drum rotation speed.

In the above construction, the laundry S is put in the drum 2 and the detergent corresponding to the amount of the laundry S is put therein. At this time, the drain valve 43 is closed and the water shutoff valves 35 and 42 are opened, and the water supply valve 45 is opened to start water supply. The detergent may be directly supplied from the opening of the drum 2, but a detergent supplying device is provided in the washing machine body 8 so that the detergent is automatically supplied as a cleaning liquid when the water supply is started. May be.

When water is accumulated in the drum 2, the motor 26 rotates the drum 2 at a low speed and at regular intervals while repeating forward and reverse rotations. At the same time, supply pump 33
Is driven, and the cleaning liquid accumulated in the tank 32 is guided to the upper portion of the water tank 3 through the liquid supply pipe 31. At this time, when the drum 2 is rotating counterclockwise, the solenoid valve 37a on the left side is
Is opened, the electromagnetic valve 37b on the right side is closed, the cleaning liquid flows into the branch pipe 36 on the left side, and is injected at high pressure from the injection nozzle 5 on the left side toward the center of the drum 2. The sprayed cleaning liquid is
It penetrates into the drum 2 through the hole 1 of the drum 2 and hits the laundry S uniformly. If the hole 1 of the drum 2 is elongated in the circumferential direction, the rotation of the drum 2 makes it look like a single hole continuous in the circumferential direction, and does not disturb the invasion of the cleaning liquid. The cleaning liquid is effectively used.

Next, when the drum 2 is rotated to the right, the cleaning liquid is jetted from the jet nozzle 5 on the right side, and the jet nozzle 5 which operates according to the rotating direction of the drum 2 is switched. In this way, the ejection nozzle 5 to be used among the plurality of ejection nozzles 5
By limiting the above, it is possible to increase the injection pressure of the cleaning liquid as compared with the case where all are used, and it is possible to enhance the cleaning effect. Further, when the injection direction of the cleaning liquid is switched according to the rotation direction of the drum 2, the laundry S will be scraped up along the right peripheral wall of the drum 2 and fall, for example, when the drum 2 rotates counterclockwise. Injection nozzle 5
When the washing liquid sprayed from hits the falling laundry S, the washing liquid permeates into the laundry S and its water pressure can remove dirt, thereby improving the washing efficiency with the washing liquid.

By the forward and reverse rotation of the drum 2, the laundry S is
The tumbling washing is repeated by repeatedly scraping up and falling by the baffle 21.
The agitation of the laundry S is promoted, the entanglement of the cloth is reduced, the uneven cleaning is eliminated, and the cleaning is performed efficiently. Here, in the conventional tumbling cleaning by rotating the drum, the maximum number of revolutions, that is, 46 rpm or more and 55 rpm or less, is set so that the laundry can be tumbled without sticking to the peripheral wall of the drum and the tumbling frequency is increased. Although it is set, in the present embodiment, since the cleaning power can be maintained and improved by the synergistic effect of the tumbling cleaning and the cleaning by the high-pressure injection, it is not necessary to increase the number of times of tumbling as in the conventional case. Therefore, by rotating the drum 2 at a low speed, the load on the motor 26 that rotates the drum 2 can be reduced.

The cleaning liquid sprayed toward the drum 2 is drained from the hole 1 of the drum 2 into the water tank 3 or the suction body 50, flows from the drainage port 40 or the suction pipe 54 to the drainage pipe 41, and on the way to the lint filter. After passing through 61, thread waste, dust, etc. are removed and flow into the tank 32. Then, the supply pump 3 is connected from the tank 32 to the connection pipe 34.
3, the liquid supply pipe 31 is pressure-fed by this, reaches the injection nozzle 5 again, and is circulated many times. Therefore, the laundry S can be efficiently washed with a small amount of washing liquid,
During this time, water is not drained to the outside of the machine, which leads to water conservation.

When such a washing process is completed, a rinsing process is started. First, the drain valve 43 is opened to drain the cleaning liquid, and then the water supply valve 45 is opened to supply water. The subsequent operation is the same as the washing step. Here, as in the case of automatically adding the detergent, additives such as a softening agent and a finishing agent may be mixed with the rinsing liquid to perform rinsing.

When the rinsing process is completed, the drain valve 43 is opened to drain the rinsing liquid and the dehydration process is started. First, the water shutoff valves 35 and 42, the drainage valve 43, the water supply valve 45, and the electromagnetic valves 37a and 37b are closed to keep the water tank 3 in a sealed state, and the suction pump 55 is operated. Then, a negative pressure force is applied to the suction body 50 through the drain pipe 41 and the suction pipe 54, and the sealing material 52 at the peripheral edge of the suction body 50 is in close contact with the outer peripheral wall of the drum 2, so that the drum covered by the suction body 50. 2 tries to take in the air in the drum 2 from the hole 1 in the peripheral wall. However, the laundry S is attached to the inner peripheral wall of the drum 2 in a spread state, the degree of vacuum in the suction body 50 is increased, and a pressure difference is generated between the laundry S and the inside of the drum 2. Then, the film of moisture that has penetrated into the laundry S loses the pressure and is sucked into the suction body 50 together with the air.

The moisture-containing air is used for drainage pipe 41.
To reach the tank 32. Here, the water and the air are separated by the difference in weight, the water is stored in the tank 32, and the air is sucked into the suction pump 55. Suction pump 5
The air taken into 5 turns into hot air by cooling the heat-generating suction pump 55, passes through the circulation pipe 56, and is blown into the water tank 3 from the outlet 57. Then, when the warm air passes through the laundry S, the evaporation of moisture is promoted and the drying of the laundry S is promoted. In addition, since the temperature of the inside of the tank 32 is lower than the ambient temperature due to the water separated from the laundry S, the hot and humid air sent to the tank 32 is condensed in the tank 32 to remove moisture, and is dried. It becomes air and is circulated again. Therefore, since suction and dehydration are performed from the hole of the drum without rotating the drum at a high speed, it is possible to suppress the generation of vibration and noise, and even if the drum is rotated at a low speed due to the synergistic effect of tumbling cleaning and cleaning by jetting. Since sufficient detergency can be obtained,
Also here, it is possible to provide a washing machine that can suppress noise and can be used with peace of mind even in a quiet environment such as at night.

Although the drum 2 was stopped during this dehydration, this may cause dehydration only from the same spot on the laundry S, so the drum 2 should be periodically rotated slowly to wash the laundry. Change the position of S. As a result, the dehydration time can be shortened and balanced dehydration can be performed. At this time, since the holes 1 of the drum 2 are arranged in parallel in the vertical and horizontal directions, it is possible to secure a constant suction area regardless of which portion of the outer peripheral wall the sealing material 52 of the suction body 50 adheres to, and thus the suction efficiency is reduced. Will not be invited.

When the portion of the suction body 50 that is in close contact with the outer peripheral wall of the drum 2 during dewatering is limited to the non-perforated portion 22 on the back surface of the baffle 21 and its periphery, the non-perforated portion 22 of the drum 2 and the suction member 50. Position control is performed to rotate the drum 2 before dehydration so that the drum 2 stops at a predetermined position that matches the peripheral edge of the. In this case, it is not necessary to regularly arrange the holes 1 of the drum 2 as described above, and therefore the holes 1 may be arranged so as to be displaced as shown in FIG. As a result, when the holes are regularly arranged, the washing liquid is blocked by the drum at the boundary between the holes, but the inside and outside of the drum are continuously communicated with each other by the jet from the jet nozzle. It is possible to improve the utilization rate of the washing liquid.

As described above, since the cleaning liquid and the rinsing liquid are strongly ejected at high pressure from the outer peripheral direction of the drum containing the laundry, the cleaning power is strong and uniform cleaning is achieved. Furthermore, by operating only the spray nozzles in a predetermined area of the plurality of spray nozzles, it is possible to eliminate wasteful spray of the washing liquid,
Since the washing liquid is jetted to the required place as much as necessary, the jet nozzle can be efficiently operated, and efficient washing can be performed.

Further, since the cleaning liquid and the rinsing liquid are circulated and used, a small amount can be used and the water saving effect can be enhanced. Moreover, due to the presence of the lint filter and the defoaming device, it is possible to prevent the performance of the supply pump from being deteriorated, and to maintain the injection pressure of the washing liquid. Therefore, the washing liquid can be effectively used and the washing power can be improved.

(Second Embodiment) In this embodiment, as shown in FIGS. 5 and 6, the injection nozzles 70 are provided in a line at the highest portion of each baffle 21 of the drum 2. The injection nozzle 70 communicates with the space formed between the baffle 21 and the peripheral wall of the drum 2, and the supply flow of the cleaning liquid and the rinse liquid is provided between the space of each baffle 21 and the liquid supply pipe 31 of the injection device 6. Three paths 71 are formed. And around the horizontal axis 23,
An inner cover 72 fixed to the drum 2 and an outer cover 73 fixed to the water tank 3 are provided.

The supply flow passage 71 extends from the rear surface of the water tank 3 to the space from the rear surface of the drum 2 through the space between the inner cover 72 and the outer cover 73, and is connected to the liquid supply pipe 31 of the water tank 3. First water channel 7 which is an external flow channel that penetrates the rear wall
4, the horizontal shaft 23 communicating with the first water channel 74 and the inner cover 72
Alternatively, the second water channel 75 surrounded by the inner cover 72 and the outer cover 73 and the third water channel 77 communicating with the second water channel 75 through the water outlet 76 and passing through the rear wall of the drum 2 to reach the space of the baffle 21. And the injection nozzles 70 in each row.
A supply flow channel 71 is provided for each of them. In particular, the second water channel 75 has a three-layer structure formed in a cylindrical shape concentric with the horizontal shaft 23, and an oil seal 78 is provided between the horizontal shaft 23 and the outer cover 73 and between the inner cover 72 and the outer cover 73. Alternatively, an O-ring is interposed, and the horizontal shaft 23 and the inner cover 72 are rotatably and watertightly held with respect to the outer cover 73. In addition, a solenoid valve 79 is provided in the first water channel 74.
Is inserted, and the operation of switching the supply of the washing liquid to the injection nozzles 70 in each row is performed. A pipe may be arranged in the space of the baffle 21 so that the third water passage 77 and the injection nozzle 70 may communicate with each other. In the figure, 80 is an angle for reinforcing the rear surface of the drum 2.

Then, the control device controls the operation of two of the three electromagnetic valves 79 in accordance with the rotating direction of the drum 2. That is, as shown in FIG. 5, when the drum 2 rotates counterclockwise, the solenoid valves 79 corresponding to the respective rows are operated so as to operate the ejection nozzles 70 of the rows in the area A.
Only the solenoid valves 79 corresponding to the respective rows are opened so that the jet nozzles 70 of the rows in the region B are operated during the clockwise rotation. At this time, since the drum 2 is rotating, the injection nozzle 70 in each region is constantly changing, but since the drum 2 is rotated at a low speed as in the first embodiment, the rotation of the drum 2 is followed. It is possible to switch the operation of the injection nozzle 70.

The other structure is the same as that of the first embodiment, but since the cleaning liquid is sprayed from the inner surface of the drum 2 by providing the spray nozzle 70 on the inner surface of the drum 2, the shape of the hole 1 in the peripheral wall of the drum is formed. Does not have to be as particular as in the first embodiment.

As a result, when the washing process is executed, the washing liquid pressure-fed from the feed pump 33 is opened from the liquid feed pipe 31 in correspondence with the rotating direction of the drum 2 and the electromagnetic valve 79 is opened.
Through the first channel 74 to the second channel 75 and the third channel 77
Through the baffle 21 and the injection nozzle 7
It is jetted from 0 toward the center of the drum 2. The same is done in the rinsing process. Other operations are the same as those in the first embodiment.

Therefore, since the injection nozzle is provided on the baffle inside the drum, there is a cleaning liquid or a rinsing liquid that collides with the peripheral wall of the drum as when the liquid is ejected from outside the drum, so that the entire amount cannot be effectively utilized. Can be sprayed uniformly and efficiently on the laundry, and the cleaning efficiency can be improved. Moreover, since the distance between the spray nozzle and the laundry is short, the cleaning effect can be further enhanced, or the cleaning power can be maintained even if the capacity of the supply pump is reduced, so that the cost can be reduced. Further, by arranging the pipes that connect the supply pump and the injection nozzle along the water tank, it is possible to save space in the main body of the washing machine and downsize the washing machine.

(Third Embodiment) In the present embodiment, one motor 26 shares the drum rotation motor and the supply pump motor for cost reduction. That is, a pulley is separately attached to the output shaft 27 of the motor 26 of the drive unit 4, and the supply pump 33 is connected to this pulley via a belt. In this case, when the motor 26 is rotated in the normal or reverse direction, the supply pump 33 is rotated in the reverse direction, so that the cleaning liquid cannot be injected. Therefore, in order to reduce the injection stop time as much as possible, when the drum 2 is normally rotated (counterclockwise), the solenoid valves 37a, 3 are operated so that the injection nozzle 5 on the left side is operated.
7b is switched, and the drive is controlled so that the reverse rotation (right rotation) is performed several times during the left rotation of the drum 2, preferably 3 to 5 times.

As a result, the drum rotates in the forward and reverse directions, so that the laundry can be easily replaced and the cleaning unevenness can be eliminated. Further, the spraying from the spray nozzle improves the cleaning power, and uniform cleaning can be performed. Further, since the drum is rotated and the washing liquid is circulated by one motor, the cost can be reduced and the space can be saved as compared with the case where the motors are operated by different motors. Moreover, since there is a synergistic effect of tumbling and cleaning by jetting, it is possible to rotate the drum at a low speed, the load on the motor is reduced, and the electric bill is saved.

The present invention is not limited to the above embodiment, and it goes without saying that many modifications and changes can be made to the above embodiment within the scope of the present invention.

In this embodiment, the number of baffles was three, but two.
There may be more than one, and each baffle may be provided with an injection nozzle or, if there are many baffles, some of them. On the other hand, the arrangement of the injection nozzles in the water tank is not limited to one row on the left and right, but may be a plurality of rows on the left and right. By doing so, it is possible to prevent the spray from being intensively sprayed, and to increase the area of contact with the laundry, so that uniform washing can be performed. When the operation of the injection nozzle is switched according to the rotation direction of the drum, one injection is not completely stopped, but the injection pressure is lowered so that the laundry is hit from both sides of the laundry, which allows uniform cleaning. . Here, when considering cost and downsizing, it is not necessary to switch and operate the injection nozzles, and it is possible to perform injection without switching from the injection nozzles provided in the three baffles, or from the injection nozzles provided in one baffle. There is also a method of jetting.

Further, by making the injection pressure from the injection nozzle high for cotton and low for silk depending on the material of the laundry, gentle washing can be performed without damaging the laundry. Moreover, by increasing the injection pressure when the amount is large and decreasing the pressure when the amount is small, the washing liquid can be used efficiently and the load on the supply pump can be reduced. By the way, as a means for changing the injection pressure, instead of controlling the drive of the supply pump, the diameter of the injection nozzle may be changed, or the flow rate of the supply to the injection nozzle may be changed by a flow control valve. It can be performed.

[0047]

As is apparent from the above description, according to the first aspect of the present invention, since the washing liquid is sprayed from the predetermined area toward the center of the drum in which the laundry is stored, the laundry is washed. Only the jet nozzles in the optimum region for jetting the liquid are utilized, the individual jet nozzles can operate efficiently, the jetting can be performed at a high pressure for uniform washing, and the washing power can be improved.

According to the second and third aspects of the present invention, the drum is rotated forward and backward, and the spray nozzles that operate in accordance with the rotation are switched. Therefore, the replacement of the laundry is promoted, the entanglement is reduced, and the laundry is scraped up. The washing liquid is evenly applied to the falling laundry, so that there is no uneven washing and efficient washing can be performed.

According to the fourth aspect, since the plurality of holes formed in the peripheral wall of the drum are elongated in the circumferential direction, when the washing liquid is sprayed while rotating the drum, the washing liquid can be efficiently passed. The washing liquid can be used effectively. Therefore, the washing liquid can be efficiently ejected from the outside of the drum.

According to the present invention, a plurality of holes are provided in parallel on the peripheral wall of the drum, and the suction member for adsorbing and dehydrating the laundry in the drum through the holes is provided in close contact with the outer surface of the drum. Dewatering is possible without rotating at high speed, and the synergistic effect of tumbling cleaning and cleaning by spraying together with this makes it possible to rotate the drum at low speed during washing and rinsing, which reduces noise and is safe even at night. It is possible to provide a washing machine that can be used with care.

According to the sixth aspect, the injection nozzles are arranged on the plurality of baffles formed on the inner peripheral wall of the drum, respectively.
As the drum is rotated, it is switched so that the washing liquid is jetted from the jet nozzle arranged in the baffle that has entered into the predetermined area, so all the jetted washing liquid goes to the laundry, and the washing liquid Can be effectively used, and the cleaning effect can be further enhanced.

According to the seventh aspect, when the washing liquid is circulated, the defoaming device can suppress the foaming of the washing liquid, so that it is possible to prevent the deterioration of the capacity of the circulation pump due to the foam. Therefore, the injection pressure from the injection nozzle does not decrease, and the washing liquid can be effectively used and the cleaning power can be improved.

According to the eighth aspect, the motor for driving the drum to rotate and the motor for driving the circulation means are shared by one motor, and when the drum rotates in one direction, the injection device is operated to rotate in the other direction. Sometimes the injection device is not operated, and the rotation of the drum in one direction is larger than the rotation in the other direction, so that the time for stopping the injection when the drum rotates in the other direction can be shortened, and the injection nozzle The washing power is improved by spraying from the washing machine, the replacement of the laundry is improved, and the uneven washing is eliminated, so that uniform washing can be performed. Further, since one motor is used, the cost can be reduced and the space can be saved as compared with the case where the motors are operated by separate motors.

According to the ninth aspect, when the jet nozzle is provided in the baffle in the drum, the flow passage for the washing liquid is formed so as to be watertight and rotatable along the horizontal axis.
It is possible to reliably supply the washing liquid without hindering the rotation of the drum, and it is possible to save space.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a drum type washing machine according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the water tank showing the arrangement of the injection nozzles.

[Fig. 3] Side view of the drum

FIG. 4 is a side view of a drum according to another embodiment.

FIG. 5 is a sectional view of the water tank showing the arrangement of the injection nozzles of the second embodiment.

FIG. 6 is a cross-sectional view showing a supply passage of an injection nozzle.

[Explanation of symbols]

 1 hole 2 drum 3 water tank 5 injection nozzle 6 injection device 21 baffle 26 motor 32 tank 33 supply pump 50 suction body 51 suction device S laundry

Claims (9)

[Claims] 1. A washing machine body equipped with a water tub, and a drum rotatably supported around a horizontal axis and having a plurality of holes in the water tub. The washing liquid is sprayed onto the laundry in the drum. Then, in a drum type washing machine for washing by tumbling the drum, a plurality of jet nozzles for jetting the washing liquid in the direction from the outer periphery of the drum toward the center are provided in the water tub, and only the jet nozzles in a predetermined area are provided. A drum-type washing machine provided with a spraying device for selectively operating. 2. The drum type washing machine according to claim 1, further comprising a spraying device that switches spraying nozzles to be operated according to a rotation direction of the drum. 3. The injection nozzles are arranged on the right side and the left side with respect to the drum, and when the drum rotates right, the right injection nozzle ejects, and when the drum rotates left, the left ejection nozzle ejects. The drum type washing machine according to claim 2. 4. The drum type washing machine according to claim 1, wherein a plurality of holes are formed in the peripheral wall of the drum, and the holes are elongated in the circumferential direction. 5. A drum is provided with a plurality of holes arranged side by side, and a suction member is provided which is in close contact with the outer surface of the drum and sucks and dehydrates the laundry in the drum through the holes. 4. The drum type washing machine described in 4. 6. The jet nozzles are respectively arranged on a plurality of baffles formed on the inner peripheral wall of the drum, and the washing liquid is jetted from the jet nozzles arranged on the baffles that come into a predetermined area by the rotation of the drum. The drum type washing machine according to claim 1, further comprising: an injection switching unit. 7. A circulating means for collecting the washing liquid from the water tank and guiding it to the jet nozzle again is provided, and the circulating means is provided with a defoaming device for suppressing foaming of the washing liquid. The described drum-type washing machine. 8. A motor for rotating a drum and a motor for driving a circulating means are shared by one motor, and the injection device is activated when the drum rotates in one direction and the injection device operates when rotated in the other direction. 2. The drum type washing machine according to claim 1, further comprising a jetting control means which is not operated, wherein the rotation of the drum in one direction is larger than the rotation in the other direction. 9. A plurality of baffles formed on the inner peripheral wall of the drum is provided with at least one jet nozzle, and a flow passage for the washing liquid to the jet nozzle is formed in a cylindrical shape concentric with the horizontal axis of the drum. 2. The drum type washing machine according to claim 1, wherein the drum type washing machine is formed and is water-tightly and rotatably coupled to an external flow path communicating with the flow path via a sliding member.