JPH0866578A - Drum type washer - Google Patents

Abstract

PURPOSE: To strengthen a cleaning force by penetrating a washing uniformly into washing water. CONSTITUTION: The washing water in which the air is mixed is injected linearly from an injection nozzle 5 on the washing S in a drum 2. Simultaneously, the drum 2 is rotated as changing the rotating speed of the drum 2, and cleaning by tumbling is performed. The impact force of the washing water on the washing S can be increased, and the washing can be penetrated into the washing S from which stiffness is removed uniformly, which enables the cleaning without cleaning nonuniformity to be performed.

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.

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.

Therefore, in order to solve the above-mentioned problems, the applicant of the present invention has disclosed in Japanese Patent Application No. 6-26730 a jet nozzle provided on both the left and right sides of the drum so that the washing liquid is jetted to the laundry. The drum type washing machine has been proposed in which the spray nozzles are switched according to the rotation direction of the drum and the rotation speed of the drum is set to a low speed of 20 rpm or more and 45 rpm or less due to the effect of cleaning by the high pressure jet.

[0005]

However, in the washing machine of the above application, since the injection nozzles are attached to the left and right,
The number of injection nozzles required is twice the number of nozzles that are operated at one time, and the structure for composing the switching mechanism and its piping becomes complicated, resulting in a large volume. Further, in order to obtain a certain cleaning effect in a short time in a drum type washing machine, it is desirable that the rotation speed of the drum is high, but if the rotation speed is low, uneven cleaning may occur in a short-time operation. It was

In view of the above, the present invention has an object to provide a drum type washing machine which has a simple structure and can efficiently inject a cleaning liquid to uniformly wash laundry.

[0007]

As shown in FIGS. 1 and 2, a means for solving the problems according to the present invention is a drum type washing machine in which a washing liquid is sprayed on a laundry S in a drum 2 to be washed by tumbling the drum 2. In the water tub 3 (or in the drum), an injection nozzle 5 that injects the washing liquid from the peripheral surface of the drum 2 onto the laundry S and a mixing unit that mixes air with the washing liquid ejected from the injection nozzle 5 are provided. The injection nozzle 5 has a structure for linearly injecting the washing liquid. The injection nozzle 5 is mounted on a baffle 21 formed on the inner peripheral wall of the water tank 3 or the drum 2.

A tank 32 for collecting the washing liquid from the water tank 3 and supplying it to the jet nozzle 5 is provided, and the capacity of the laundry S is detected from the amount of water supplied and the amount of water accumulated in the tank 32. The rotation speed of the drum 2 is changed.

[0009]

In the above means for solving the problem, the laundry S is put in the drum 2 and the water supply is started. Here, since the laundry S absorbs water, there is a difference between the amount of water supplied and the amount of water accumulated in the tank 32. Therefore, the amount of laundry is calculated from this. Then, the operating conditions of washing, rinsing, and dehydration are set according to the amount of the laundry S.

Then, a set amount of detergent is poured into the tank 32 until the set amount of water is obtained, and the washing operation is performed.
Simultaneously with the rotation of the drum, the spraying device 6 is driven to linearly spray the cleaning liquid from the spraying nozzle 5. Since the cleaning liquid is mixed with air in the middle of the cleaning liquid, the cleaning liquid containing air bubbles uniformly hits the laundry S. The drum 2 is first rotated at a low speed to allow the washing liquid to penetrate into the laundry S. When the washing liquid has penetrated into the laundry S to some extent, the rotation speed of the drum 2 is increased to perform washing by tumbling. After that, the low speed operation and the high speed operation are alternately repeated at regular intervals to promote the distribution of the cleaning liquid to the laundry S and improve the cleaning power. When the washing step is completed, the rinsing step is performed by rotating the drum 2 while jetting the rinsing liquid from the jet nozzle 5 in the same manner.

[0011]

【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 are provided with an injection device 6 for operating the injection nozzles 5.

The water tub 3 is in the form of a horizontal cylinder having a laundry inlet / outlet 7 formed on its front surface. The upper surface of the water tub 3 is suspended 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. Furthermore, 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. The laundry doorway 7 is provided on the front of the washing machine body 8.
Has an opening 10 communicating with the laundry entrance / exit 7
A lid 11 for sealing the is attached so as to be openable and closable.

The drum 2 is formed in a cylindrical shape having an opening 20 on the front surface, and the hole 1 formed in the peripheral wall thereof is elongated in the circumferential direction, and both ends in the circumferential direction are arcuate. 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. It is a non-perforated part that 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 a rotation receiving portion 22 formed on the rear surface of the drum 2. The horizontal shaft 23 penetrates the rear wall of the water tank 3 and is rotatably supported by a bearing 24. A drive pulley 25 is attached to the tip.
A motor 26 capable of rotating in the forward and reverse directions is attached to the lower surface of the water tank 3, and an output shaft 27 of the motor 26 has a motor pulley 28.
Is installed. 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 transmitted to the horizontal shaft 23 via the output shaft 27 of the motor 26, the motor pulley 28, the drive belt 29, and the drive pulley 25, and these constitute the drive device 4.

The jet nozzles 5 are attached to the left or right of the water tank 3 at an obliquely upper position so as to penetrate the water tank 3, and four injection nozzles 5 are arranged in a line in the axial direction. As shown in FIG. 3, the injection nozzle 5 has a tip formed with an injection port 5b thinner than the inlet 5a. With such a shape, when the washing liquid reaches the injection port 5b from the inlet 5a, the flow velocity becomes faster, and
When flowing out from b, the flow becomes constricted, the cross-sectional area becomes small, and it is possible to make a linear injection, the injection direction is toward the center of the drum 2, and the water spray angle is 10 degrees or less.

The injection device 6 has a circulation pipe 31 connected to each injection nozzle 5 and a tank 32 for storing a washing liquid.
And pressurize the washing liquid from the tank 32 and the circulation pipe 31.
And a liquid pump 33 for sending the liquid. The liquid pump 33 is driven by a motor different from the motor 26 of the drive device 4,
A water shutoff valve 35 is interposed in a connection pipe 34 that connects the tank 32 and the pump 33. The circulation pipe 31 is branched before the water tank 3 and communicates with each of the injection nozzles 5.

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 configure a circulation means for circulating the washing liquid together with the injection device 6. A drain hose 44 having a drain valve 43 interposed is connected to the tank 32, and a connection pipe 34 is branched from the drain hose 44 upstream of the drain valve 43. 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 a water supply, and a water supply sensor 47 including a differential pressure type, electromagnetic type, positive displacement type, ultrasonic type flow rate sensor or the like. Is attached.

Then, as a mixing means for mixing air into the washing liquid and injecting it from the injection nozzle 5 (this is referred to as a bubble jet in this embodiment), it is located before branching to each injection nozzle 5 of the circulation pipe 31. An air suction pipe 48 is connected to which an air pump 49 is interposed.

A water amount sensor 50 including a water level sensor and a weight sensor for detecting the amount of accumulated water is attached to the tank 32, and a defoaming device 51 for suppressing foaming of the washing liquid is provided. The defoaming device 51 is attached to the side surface, the bottom surface or the upper surface of the tank 32, and is a device that heats and breaks the bubbles, a device that irradiates ultrasonic waves with a frequency of 20 kHz to break the bubbles, and a defoaming device such as silicone. It consists of any one of the ones that drop the agent to defoam. The defoaming device 51 causes the bubbles in the tank 32 to disappear, and the suction of bubbles into the pump 33 is suppressed.
It is possible to prevent the deterioration of the ability of 3. This enables efficient circulation of the cleaning liquid.

The tank 32 may be equipped with a heater which is a heater for heating the washing liquid, especially the washing liquid. 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 effect can be enhanced by heating the cleaning liquid.

A thread waste filter 52 for removing thread waste from the washing liquid is detachably provided in the middle of the drain pipe 41, and the thread waste filter 52 is provided on the front surface of the washing machine body 8.
A take-out port 53 for removing is formed. The lint filter 52 is a fine fiber bag and is inserted so as to close the drain pipe 41. As a result, thread wastes and large dusts are removed from the liquid drained from the water tank 3, and these are not entangled or clogged with the pump 33, so that the performance of the pump 33 can be prevented from lowering. Then, if the thread waste filter 52 is periodically removed and cleaning is performed, the high-pressure injection of the cleaning liquid can be maintained, and the deterioration of the cleaning power can be prevented.

In the washing machine constructed as described above, washing,
The drive unit 4, the injection unit 6, the air pump 49 and the respective valves are drive-controlled by a control unit 60 composed of a microcomputer according to each process of rinsing and dehydration, and operation keys on 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 water supply sensor 47, the water amount sensor 50, the temperature sensor, the dirt sensor, and the like. The control device 60, as shown in FIG.
A water supply amount detection circuit 61 for detecting the water supply amount by the detection signal from 7, a tank water amount detection circuit 62 for detecting the tank water amount by the detection signal from the water amount sensor 50, and both circuits 6
A control circuit 63 that calculates the amount of laundry by the signals from 1, 62 and sets operating conditions, and a water supply valve drive circuit 64 that drives the water supply valve 45 by the drive signal from the control circuit 63.
And a drum rotation drive circuit 65 for driving the motor 26 so as to change the rotation speed of the drum 2 from high speed to low speed or from low speed to high speed during washing. Although not shown, the control device 60 also includes a drive circuit for driving each valve, a drive circuit for the injection device 6 and the air pump 49, and the like. By the way, in the method of calculating the laundry amount, the difference between the water supply amount at the start of washing and the water amount in the tank 32 is
Therefore, the difference is first obtained, and the amount of water absorption varies depending on the material of the laundry S, so the amount of laundry is calculated by multiplying it by a coefficient according to the material. The material of the laundry S is input before the operation is started.

In the above construction, when the laundry S is put into the drum 2 and the operation is started, the drain valve 43 and the water shutoff valve 35
Is closed and the water shutoff valve 42 is opened, and the water supply valve 45 is opened to start water supply. When the water supply amount detection circuit 61 detects that the water supply amount has reached a certain amount by the signal from the water supply sensor 47, the control circuit 63 sends a stop signal to the water supply valve drive circuit 64, and the water supply valve 45 is closed. Next, a drive signal is sent to the drum drive circuit 65, and the drum 2 is rotated at 50 rpm or less for about 15 seconds. After that, the tank water amount detection circuit 62 detects the water amount based on the signal from the water amount sensor 50. Here, since the laundry S absorbs water, the water supply amount and the tank 3 are increased.
Since there is a difference from the amount of water accumulated in 2, the amount of water in the tank 32 is subtracted from the amount of water supply to obtain the amount of water absorption, and the amount of laundry is calculated by multiplying it by a coefficient according to the material of the laundry S. Then, the operating conditions of washing, rinsing, and dehydration are set according to the amount of the laundry S. In this way, the amount of laundry can be accurately detected in a short time, easily and without damaging the laundry, and washing is performed with an appropriate amount of water and detergent, resulting in water saving and detergent cleaning.
High cleaning power can be achieved regardless of the amount of laundry and damage can be prevented.

Then, the above operation is repeated while the set amount of the detergent is added until the set amount of water is obtained in the tank 32. Although the required amount of detergent may be displayed and the detergent may be directly injected from the opening 20 of the drum 2, a detergent injection device is provided in the washing machine main body 8 so that the required amount of detergent is supplied and the cleaning liquid is automatically supplied by water supply. May be supplied as. When the cleaning liquid in which the detergent is dissolved is accumulated in the tank 32 in a constant amount of water, the washing operation is performed. The motor 26 is driven to rotate the drum 2. Also, at the same time as the drum rotation,
The water shutoff valve 35 is opened, the pump 33 is driven, and the tank 32
The cleaning liquid accumulated in the water flows through the circulation pipe 31 into the water tank 3.
Is guided to the upper part of. Here, the air sent by the air pump 49 is mixed with the cleaning liquid, and is linearly jetted from the jet nozzle 5 obliquely above the drum 2 toward the center at high pressure. The bubble jet in which bubbles are mixed in the cleaning liquid passes through the hole 1 of the drum 2 and enters 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, which hinders the invasion of the cleaning liquid. However, the cleaning liquid is effectively used.
Further, the cleaning liquid is completely distributed to the laundry S by the high-pressure injection from the obliquely upper part of the drum 2, and the cleaning power is improved accordingly. That is, if sprayed from directly above the drum 2, the laundry S may not be washed and may be discharged from the lower drainage port 40 as it is, and if sprayed from directly beside the drum 2, the spray pressure is weakened because it opposes gravity. Therefore, the impact force on the laundry S and the complete distribution of the cleaning liquid may be hindered. Therefore, the high pressure injection from the obliquely upper part of the drum 2 can maximize the injection performance.

At the start of washing, the drum 2 is at a normal 50 rpm.
It is rotated below to promote the penetration of the washing liquid into the laundry S. Approximately 2 minutes after the cleaning liquid has penetrated into the laundry S to some extent, the rotation speed of the drum 2 is increased to about 70 rpm to 30
Perform cleaning by tumbling for about 1 second to 1 minute. After that, the operation at 70 rpm and the operation at 50 rpm or less are alternately repeated at regular intervals to promote the distribution of the cleaning liquid to the laundry S and improve the cleaning power. Immediately before the end of the washing operation, the rotation speed of the drum 2 is increased to about 70 rpm and washing is performed for about 1 minute to 1 minute and a half. In this way, by changing the number of rotations of the drum 2, the number of times the baffle 21 is scraped up and dropped to increase the stirring of the laundry S,
The cloth entanglement is reduced, the penetration of the cleaning liquid into the laundry S is promoted, and the impact force due to tumbling after the penetration is increased, so that the cleaning liquid is evenly and evenly distributed, and cleaning unevenness is eliminated and efficient cleaning is achieved. Becomes Therefore, the cleaning power is improved and the cleaning time can be shortened.

By injecting the cleaning liquid linearly, a high impact force can be applied to the laundry S,
Since the laundry S is rubbed and loosened, the distribution of the cleaning liquid becomes uniform, and the cleaning power can be improved. Further, by using a bubble jet, the impact force on the laundry S is increased, and the washing power can be further enhanced. here,
Table 1 shows an example in which the effect of the bubble jet was experimentally confirmed. As an experimental condition, the amount of laundry is 2 kg and the amount of water is 13.4.
The cleaning rate was examined when the flow rate and the pressure of the bubble jet were changed at 1 / min and a water pressure of 0.9 kgf / cm ² .

[0028]

[Table 1]

The jet means a jet of only the cleaning liquid. According to this, it can be seen that, by using the bubble jet, the cleaning rate is increased and the cleaning power is improved as compared with the jet in which air is not mixed.
The reason for this is that if it is a normal jet, the impact on the laundry S becomes chronic by continuous jetting, but when air is mixed, pulsed jetting occurs and pressure fluctuations occur, causing bubbles mixed in the washing liquid. It is considered that the impact when the laundry expands and bursts is also taken into account and the laundry S is impacted, the impact force increases, and the cleaning effect becomes remarkable.

The cleaning liquid sprayed toward the drum 2 is drained from the hole 1 of the drum 2 into the water tank 3, flows from the drainage port 40 to the drainage pipe 41, and passes through the yarn waste filter 52 on the way to remove yarn waste. Dust and the like is removed and flows into the tank 32. Here, since the cleaning liquid in the tank 32 is bubbling, the defoaming device 51 causes the bubbles to disappear. Then, it is guided from the tank 32 to the pump 33 through the connection pipe 34,
As a result, the inside of the circulation pipe 31 is pressure-fed, reaches the injection nozzle 5 again, and is repeatedly circulated. Therefore, the laundry S can be efficiently washed with a small amount of washing liquid, and water is not drained to the outside of the machine during this period, which leads to water saving.

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 that of the washing step. However, the rotation speed of the drum 2 may or may not be changed. At this time, rinsing may be carried out by adding additives such as a softening agent and a finishing agent to the rinsing liquid as in the case where the detergent is automatically added. After that, when the rinsing process is completed, the drain valve 43 is opened to drain the rinsing liquid, and the drum 2 is rotated at a high speed to perform a normal dehydration process. In centrifugal dehydration by high speed rotation,
Noise and vibration increase. Therefore, paragraph number “0018” of the specification of Japanese Patent Application No. 6-26730, which is the earlier application,
Further, suction suction and dehydration may be performed by providing a suction body and a suction device as described in “0019”, and dehydration can be performed without rotating at high speed, and noise and vibration can be reduced.

(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 has the same shape as that of the first embodiment, communicates with the space 72 formed between the baffle 21 and the peripheral wall of the drum 2, and the space 72 of each baffle 21 and the circulation pipe of the injection device 6. A tank 73 for storing a cleaning liquid and a rinsing liquid is provided between the tank 73 and the unit 31.

The tank 73 is attached by a support 75 to a fan-shaped opening 74 formed obliquely above the water tank 3, and is formed in a fan shape having a size of a quarter of the circumference with respect to the water tank 3. Has been done. The width of this opening 74 is the baffle 21.
Is the same as the height of the mechanical seal 76 around it
Is installed. On the other hand, a ring-shaped mechanical seal 77 is attached to the drum 2 as well, and the drum 2 and the tank 73 are watertightly and rotatably connected by the seals 76 and 77. Further, a circular communication hole 78 is formed at a position where the baffle 21 of the drum side mechanical seal 77 is located, and the rotation of the drum 2 allows each communication hole 78 to communicate with the opening 74 in order. Further, the tank 73 has an air pump 4
The air suction pipe 48 in which 9 is interposed and the water supply pipe 46 in which the water supply valve 45 is interposed are connected, and the defoaming device 51 is mounted. A pipe is arranged in the space 72 of the baffle 21 so that the tank 73 and the injection nozzle 70
And may be communicated. The other structure is the same as that of the first embodiment.

As a result, when the washing process is executed, the washing liquid pumped from the pump 33 is supplied from the circulation pipe 31 to the tank 73, and when the communication hole 78 of the baffle 21 reaches the opening 74 by the rotation of the drum 2, the baffle 21 is opened. Two
The cleaning liquid is filled in the space 72 of No. 1 and the cleaning liquid is bubble jetted from the injection nozzle 70 toward the center of the drum 2 by the pressure thereof. Then, the washing and rinsing steps are performed as 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 which 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 impact force is increased and the washing power can be further enhanced.
Alternatively, even if the capacity of the pump is reduced, the cleaning power can be maintained, so that the cost can be reduced. Also, the degree of freedom in the shape of the drum hole is increased.

(Third Embodiment) In the first embodiment, the air pump is used to mix the air, but as in the third embodiment shown in FIG. 7, a constricted portion 80 is formed in the middle of the circulation pipe 31. However, one hole 81 can be formed in the constricted portion 80. As a result, the flow velocity becomes faster and the pressure drops in the constricted portion 80, so that air can be sucked from the holes 81 by the ejector effect and the air bubbles can be mixed into the washing liquid without using a device such as a pump. Even at low cost air mixing can be achieved.

Although the number of baffles is three in each of the above-mentioned embodiments, it is sufficient that the number of baffles is two or more, and an injection nozzle may be arranged in each baffle, or if there are many baffles, some of them may be arranged.

Also, 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 injection pressure when the amount is small, the washing liquid can be used efficiently and the load on the pump can be reduced. By the way, as a means for changing the injection pressure, instead of controlling the drive of the pump, the diameter of the injection nozzle can be changed,
The supply flow rate to the injection nozzle may be changed by a flow rate control valve, and more delicate cleaning can be performed.

(Fourth Embodiment) FIG. 8 is a vertical sectional view showing the overall construction of a washing machine according to the fourth embodiment of the present invention. In the figure, reference numeral 101 denotes a main body of a washing machine, and a large number of holes are formed in a part of a drum 102 that accommodates and rotates laundry to centrifuge and dehydrate water in the laundry. A water tank 103 is provided around the drum 102. A horizontal shaft 104, which penetrates the center of the water tank 103 and has one end fixed to the rotation center of the drum 102, is provided, and a drum pulley 105 is fixed to the end thereof.
Further, below the water tank 103, the drum rotation motor 1 is provided.
06 is provided, and the rotating shaft of the motor 106 is connected to the drum pulley 105 by a belt 107. The water tub 103 is suspended from the washing machine main body 101 by a spring 108 to absorb vibrations, and a damper 109 is provided between the lower portion of the water tub 103 and the bottom surface of the washing machine main body 101. Further, since the weight 110 is provided on the upper portion and the front portion of the water tank 103, the vibration during the rotation of the drum is reduced.

111 is an installation foot provided on the bottom of the washing machine main body 101, 112 is a drain valve, 113 is a drain pipe, 1
Reference numeral 14 is a lint filter provided on the front side of the main body of the washing machine to easily remove lint, 115 is a control device for a motor, a valve, a pump, etc., 116 is a water supply valve, 117 is a bearing, 11
8 is a balancer, 119 is a washing liquid pump, 120 is a washing water tank, 121 is an oil seal, and 122 is a detergent inlet.

The main part of this embodiment will be described below.
23 is a washing liquid supply pipe fixed to the drum 102, which is a baffle 131 fixed to the inner peripheral surface of the drum 102.
a, 131b, 131c, and three supply pipe injection units 123A having a plurality of injection nozzles 132a, 132b, 132c having a diameter of 2 to 5 mm, and the pipe nipple 12 at one end.
4, a single supply pipe shaft portion 123C that is coaxial with the horizontal shaft 104 that is the drum rotation shaft, and three supply pipe connection portions 123B that branch from the shaft portion 123C in three directions and communicate with the injection unit 123A. It consists of 125 is the supply pipe shaft portion 1
23C and an oil seal for sealing the fixed support 126,
127 is attached to the fixed support 126 and the water supply pipe 1
28 and a pipe nipple connected to the circulation pipe 129,
130 is a water supply pipe 128 for supplying water to the drum 102.
And a circulation pipe 129 for selecting water to be supplied.

Numeral 133 is an air intake for introducing air into the washing liquid, and numeral 134 is an air pump. Reference numeral 137 denotes a control valve that works in conjunction with the air flow rate sensor 135 to adjust the air flow rate based on the amount of water detected by the water amount sensor 136.
The volume mixing ratio is adjusted to about 1: 1.

Reference numerals 138 and 139 are first and second foam sensors for detecting the foam height of the washing water, and when either of them detects foam, the defoaming agent addition port 140 is opened and, for example, a defoaming agent such as silicone oil. The mechanism is such that an antifoaming agent is added to the washing liquid from the agent supply device 141. The installation portion of the defoaming agent supply device 141 is attached to the front portion of the main body of the washing machine to facilitate maintenance.

The first bubble sensor 138 in the tank 120
Are 3 pairs (high, medium,
(Low) optical sensor that detects the presence of bubbles by irradiating light at regular intervals after the start of washing. The second bubble sensor 139 in the circulation pipe is a flow meter, constantly measures the flow rate in the circulation pipe after the start of washing, and detects the presence of bubbles when a sharp decrease in the flow rate is observed.

FIG. 9 is a developed view of the drum 102 of FIG. 8, showing the mutual positions of a plurality of nozzles. Three baffles 131a, 131b arranged at 120 degree intervals,
Nozzles 132a, 132b, 132 on 131c
c is arranged such that the positions of the baffles are slightly shifted in the drum depth direction (horizontal axis direction). As a result, the number of jets of washing water in the drum 102 is increased, and the ability to wash the laundry thoroughly is enhanced.

The silicone oil as the defoaming agent has the effect of reducing the surface tension of the cleaning liquid and breaking the bubbles, and for example, it is assembled based on dimethyl silicone oil. Silicone oil defoamers are used extensively, including in the food and pharmaceutical sector, and have proven safety. Moreover, since the amount of addition is 100 to 150 ppm and defoaming is possible, there is no effect on the human body or the laundry. Since the addition amount is small, one time is sufficient for one washing, and the addition is performed once when any of the bubble sensors 138 and 139 detects bubbles.

The operation of the washing machine having the above structure is shown in FIGS.
It will be described below with reference to 0 and 11. First, after the laundry S is put into the drum 102, a detergent amount corresponding to the laundry S is put into the detergent inlet 122, and when the washing start button is pressed, the control device 115 operates and the water supply valve 116 is opened to supply water. . The supplied water melts the detergent as it passes through the detergent inlet 122, passes through the water supply pipe 128, passes through the selection valve 130 opened to the water supply side, branches from the shaft portion 123C of the supply pipe 123 into three directions, and is divided into three. From the injection unit 123A of the plurality of injection nozzles 1
It is sprayed on the laundry S through 32a to 132c. The sprayed cleaning liquid is stored in the tank 120 after removing the lint and dust by the filter 114 after cleaning, and sent to the circulation pipe 129 by the washing liquid pump 119. at the same time,
The control valve 137 is opened, the air pump 134 is operated to take in air from the air intake port 133, the air flow rate sensor 135 detects the flow rate, and the flow rate of the washing liquid delivered from the washing liquid pump 119 is detected by the water amount sensor 136. Compared with the controller 115, the volume ratio of washing water to air is about 1:
The air flow rate is adjusted by the control valve 137 so as to be 1, and the air flow rate sensor 135 confirms. The bubble jet cleaning liquid produced here is supplied to the drum 102 again through the circulation pipe 129, the selection valve 130 opened to the circulation side. This cycle is repeated several times to perform washing.

During cleaning, when the first foam sensor 138 detects foam at a high, medium, or low level, or when the second foam sensor 139 detects foam, the controller 115 operates and the defoaming agent is added. Open mouth 140 and add antifoam agent to the wash liquor.

When the washing process is finished, the drain valve 112 is opened to the drain pipe 113 side, and the drum 102 is rotated to drain the washing liquid while draining. After that, the drain valve 112 is closed, the water supply valve 116 is opened, and after the jet rinsing or the circulating jet rinsing with tap water is performed by the same process as the previous washing process, the drain valve 112 is opened to the drain pipe 113 side and the drum 102 is opened. Drain and dehydrate while rotating.

[0050]

[Table 2]

Table 2 shows the relationship between the cleaning liquid / air mixing ratio and the cleaning rate. The washing rate is a percentage of the washing degree calculated in the washing performance test defined in JISC9606.

[0052] detergency ratio E = D × 100 = (R W -R 1) /
_{(R 0 -R 1) × 100} E: detergency ratio (%) D: cleanliness R _W: reflectance after stained clothes washing (%) R _1: reflectance before stained clothes washing (%) R _0: Hara Cloth reflectance (%) From this table, the cleaning effect is maximized when the mixing ratio of the cleaning liquid and air is 1: 1, and highly efficient cleaning of the cloth can be achieved.

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

[0054]

As is apparent from the above description, claim 1
According to the invention of claim 1, since the jet nozzle for jetting the washing liquid from the peripheral surface of the drum to the laundry is provided in the water tank, and the jet nozzle has a structure for jetting the washing liquid linearly, a high impact on the laundry is achieved. The force can be applied, the uniform distribution of the washing liquid, particularly the washing liquid, to the laundry is promoted, and the washing power can be improved in combination with the washing by tumbling.

According to the second aspect of the invention, since the washing liquid jetted from the jet nozzle is mixed with air, the impact force on the laundry can be further increased by changing the pressure of the jet liquid. Penetration of the washing liquid into the laundry is promoted and the detergency is improved.

According to the third aspect of the present invention, since the injection nozzle is attached to the baffle formed on the inner peripheral wall of the drum, the washing liquid is injected into the laundry from a very short distance, which results in a high impact force. Penetration power is obtained and cleaning power is improved.

According to the fourth aspect of the present invention, by changing the rotation speed of the drum at the time of washing, stirring of the laundry is promoted, the laundry is massaged and loosened, and the washing liquid permeates well. Further, the impact force due to the tumbling after the permeation is increased, so that it is possible to eliminate uneven cleaning and shorten the cleaning time.

According to the invention of claim 5, the capacity of the laundry can be detected from the amount of water collected in the tank for collecting the washing liquid from the water tank and supplying it to the jet nozzle, and the amount of water supplied.
The amount of laundry can be easily detected in a short time, and it is possible to wash with the appropriate amount of water and detergent according to the amount of laundry, which can save water and detergent, and achieve high detergency regardless of the amount of laundry. It can also prevent damage.

According to the sixth aspect of the present invention, since the plurality of injection nozzles are arranged at the positions of different depths of the drum, the injection path of the washing liquid is increased, the washing liquid is evenly and effectively applied to the laundry, and the cleaning effect is obtained. Goes up.

According to the invention of claim 7, since the volumetric mixing ratio of the washing liquid and the air is set to about 1: 1, the impact of the washing liquid on the laundry is increased and the washing effect is enhanced.

According to the eighth aspect of the present invention, since the volumetric mixing ratio of the washing liquid and the air is constantly adjusted to about 1: 1 by the control valve, the cleaning effect can be always kept at the best level.

According to the ninth aspect of the present invention, the foam height of the washing liquid is detected, and when a highly foaming detergent is used by mistake, an appropriate amount of antifoaming agent is added, so that the cleaning effect is obtained regardless of the detergent used. It is possible to prevent bubbles from leaking. As a defoaming means, if a heater or a fan is incorporated in the washing liquid circulation path, a large space is required, and there is a possibility that electric leakage may occur. In addition, the detergent used in drum-type washing machines is limited to low-foaming detergents, so if you accidentally add high-foaming detergent, bubbles may leak from the sealing part of the window on the front of the washing machine, or bubbles may be generated. Although the cushion functions to reduce the cleaning effect, the present invention can solve these problems.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional view 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 is a detailed view of the injection nozzle as well.

FIG. 4 is a block diagram of the control device.

FIG. 5 is a schematic view of a main part of a drum type washing machine according to a second embodiment.

FIG. 6 is a side view of the drum as seen from the tank side as well.

FIG. 7 is a configuration diagram of a mixing unit of a washing liquid and air in a third embodiment.

FIG. 8 is an overall vertical sectional view of a drum type washing machine according to a fourth embodiment.

FIG. 9 is a development view of the peripheral surface of the drum showing the arrangement of the injection nozzles.

FIG. 10 is a block diagram of the control device.

FIG. 11 is a flowchart of the same control operation.

[Explanation of symbols]

 1 Hole 2 Drum 3 Water Tank 5 Injection Nozzle 6 Injection Device 47 Water Supply Sensor 49 Air Pump 50 Water Volume Sensor S Laundry 101 Washing Machine Main Body 102 Drum 103 Water Tank 104 Horizontal Axis 123 Washing Liquid Supply Pipe 132a to 132c Injection Nozzle 134 Air Pump 137 Control Valve 138 1st foam sensor 139 2nd foam sensor 140 Defoaming agent addition port 141 Defoaming agent supply device

Claims (9)

[Claims] 1. A washing machine main body equipped with a water tub and a drum having a plurality of holes rotatably supported around a horizontal axis in the water tub. The washing liquid is sprayed onto the laundry in the drum. In a drum type washing machine for washing by tumbling a drum, a plurality of injection nozzles for injecting a washing liquid from the peripheral surface of the drum onto the laundry are provided in the water tub, and the injection nozzles inject the washing liquid linearly. A drum type washing machine characterized by its structure. 2. A washing machine main body equipped with a water tub, and a drum having a plurality of holes rotatably supported around a horizontal axis in the water tub, and the washing liquid is sprayed onto the laundry in the drum. In a drum type washing machine for washing by tumbling a drum, a plurality of injection nozzles for injecting washing liquid from the peripheral surface of the drum onto the laundry and a mixing means for mixing air with the washing liquid injected from the injection nozzles. A drum-type washing machine characterized by being provided with. 3. The drum type washing machine according to claim 1, wherein a plurality of injection nozzles are mounted on a baffle formed on an inner peripheral wall of the drum. 4. The drum type washing machine according to claim 1 or 2, further comprising a rotation driving means for changing a rotation speed of the drum at the time of washing. 5. A tank for collecting the washing liquid from the water tank and supplying it to a plurality of jet nozzles is provided, and a capacity detecting means for detecting the capacity of the laundry from the amount of water supplied and the amount of water accumulated in the tank is provided. The drum type washing machine according to claim 1 or 2, characterized in that. 6. The drum type washing machine according to claim 1, wherein the plurality of injection nozzles are arranged at positions having different depths of the drum. 7. The drum type washing machine according to claim 1, wherein the volume mixing ratio of the mixing means for mixing the washing liquid with air is set to about 1: 1. 8. The drum type washing machine according to claim 7, further comprising a control valve for adjusting the volume mixing ratio of the mixing means to about 1: 1. 9. A foam sensor for detecting the foam height of the washing liquid is provided, and a controller for adding the defoaming agent to the washing liquid from the defoaming agent supply device according to a detection signal of the foam sensor is provided. The drum type washing machine according to claim 1 or 2, which is characterized in that.