JPH0838782A - Drum type washing machine - Google Patents

Abstract

PURPOSE:To improve the sealing property during the feeding process of a cleaning solvent to a baffle when the cleaning solvent is fed from the baffle to the laundry. CONSTITUTION:A water feed section 26 outside a water tub 4 and an injection nozzle 25 provided on the baffle 2 of a drum 3 are connected by a feed pipe 27, and the feed pipe 27 penetrates a horizontal shaft 13. A nipple 50 is fitted at the end section of the feed pipe 27, and the nipple 50 is rotatably coupled with a fixed base 52 via an oil seal 51. Since the fixed base 52 and the confluence pipe 53 of the water feed section 26 are connected by a hose nipple 54, the water feed section 26 and feed pipe 27 are watertightly and rotatably connected.

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 for washing laundry by tumbling while spraying washing water and rinsing water.

[0002]

2. Description of the Related Art Generally, water is supplied to a stationary water tank in a washing machine, so that a water supply hose is simply fastened to a water supply port of the washing machine. However, in this case, since washing water and rinsing water are supplied from the outside of the aquarium to wash and rinse, effective washing and rinsing are not performed, and a large amount of water is consumed.

Therefore, there is a drum-type washing machine that can efficiently wash with a small amount of water. The present applicant has previously proposed Japanese Patent Application Nos. 5-318291 and 6-26730 with a drum type washing machine capable of efficiently injecting a washing liquid to uniformly wash laundry. That is, by providing an injection nozzle on the baffle in the drum and spraying a washing liquid such as washing water or rinse water from the injection nozzle to the laundry, the liquid is evenly applied to the laundry to eliminate uneven cleaning,
You can wash efficiently. Moreover, by circulating the water in the water tank, useless water is not used and water is saved.

[0004]

In the former proposed example, a tank is attached to the rear surface of the drum via a mechanical seal as a water supply mechanism for supplying the washing liquid from the outside to the injection nozzle in the rotating drum. The drum is rotatable with respect to the tank fixed to the water tank, and the tank and the injection nozzle are in communication with each other. Also, in the latter proposal example,
A cylindrical flow passage is formed concentric with the horizontal axis of the drum, which is water-tightly and rotatably coupled to the external flow passage through an oil seal.

As described above, since the water supply mechanism is provided on the outer circumference of the drum and the horizontal shaft, the drum is eccentric due to the vibration of the drum, the seal is broken, a gap is generated, water leakage occurs, and a contact noise is generated. There was a problem that it occurred.

In view of the above, it is an object of the present invention to provide a drum type washing machine having improved sealing performance in the process of supplying the washing liquid to the baffle when the washing liquid is supplied from the baffle to the laundry. .

[0007]

As shown in FIGS. 1 and 2, a means for solving the problems according to the present invention includes a water tub 4 incorporated in a washing machine main body 6 and a rotatably supported inside the water tub 4 via a horizontal shaft 13. And a drum 3 having a plurality of holes 1, and a water supply means for supplying a washing liquid from a baffle 2 formed on the inner peripheral wall of the drum 3 is provided. The water supply means supplies water to the baffle 2 through a horizontal shaft 13. The baffle 2 includes a jet nozzle 25, a water supply unit 26 for sending the washing liquid to the jet nozzle 25, and a supply pipe 27 that connects the water supply unit 26 and the jet nozzle 25 to each other. 27 penetrates the horizontal shaft 13.

The water supply unit 26 is attached to the main body 6 of the washing machine, and the nipple 50 attached to the end of the supply pipe 27 is rotatably supported by the water supply unit 26 via a seal member 51.

Further, the water supply means is provided with a circulation device for circulating the washing liquid discharged from the water tank 4 to the drum 3 again.
The supply of tap water or circulating fluid can be switched.

[0010]

In the above means for solving the problem, when the laundry S is put in the drum 3 and then tap water is supplied, the washing water in which the detergent is put in passes through the supply pipe 27 and the baffle 2
Is sprayed from the injection nozzle 25 toward the laundry S and directly penetrates into the laundry S. Then, the drum 3 is rotated and the washing operation is performed. At this time, the water supply from the tap water is stopped, the washing water supplied to the aquarium 4 is circulated, and the washing water is sprayed again from the injection nozzle 25 toward the laundry S. As it goes up, it also saves water. The same rinsing operation can improve the rinsing effect and save water.

Further, since the horizontal shaft 13 rotates while the drum 3 rotates, the supply pipe 27 also rotates, but the nipple 50 at the end of the supply pipe 27 is sealed by the seal member 51. , Never leak. Moreover,
Even if the rotation of the drum 3 becomes unbalanced and eccentrically rotates, since the supply pipe 27 penetrates the horizontal shaft 13, the supply pipe 27 does not vibrate significantly, and the supply pipe 27 vibrates to the sealing portion. It is possible to prevent the influence of the above, and it is possible to prevent damage to the seal member 51 and water leakage.

[0012]

EXAMPLE A drum type washing machine of this example is as shown in FIG.
A drum 3 having a plurality of holes 1 and a plurality of baffles 2 on its peripheral wall, and a water tank 4 for rotatably supporting the drum 3.
And a water supply means for spraying a washing liquid (washing water or rinsing water) in a direction from the baffle 2 toward the center of the drum 3.

The water tub 4 has a horizontal cylindrical shape with a laundry inlet / outlet 5 formed on the front surface thereof. The upper part of the water tub 4 is suspended by a spring 7 and the lower part thereof is supported by a damper 8. There is. By these, it has the structure which holds the water tank 4 and damps the vibration of the water tank 4.
Further, weights 9 are attached to the front surface and the upper portion of the water tank 4 to reduce vibration when the drum rotates. Also, legs 10 are attached to the four corners of the bottom surface of the washing machine body 6 to block the conduction of vibration to the floor and the like. And the washing machine body 6
An opening 11 communicating with the laundry entrance / exit 5 is formed on the front surface of the, and a lid 12 for sealing the opening 11 is attached so as to be openable / closable.

The drum 3 is formed in a cylindrical shape having an opening 3a on the front surface, and the holes 1 formed in the peripheral wall thereof are regularly arranged in the circumferential direction and the axial direction. Not formed. Further, on the inner peripheral wall of the drum 3, three baffles 2 are formed at equal intervals in parallel with the axial direction, and the peripheral wall corresponding to the back surface of the baffle 2 and its periphery is a hole-free hole. It is a part.

The horizontal axis 1 is provided at the center of the rear surface of the drum 3.
3 is fixed, the horizontal shaft 13 penetrates the rear wall of the water tank 4 and the receiving plate 14 and is freely rotatable by a bearing 15 and is watertightly supported by an oil seal 16, and a drum pulley 17 is attached to the tip thereof. . A motor 18 capable of rotating in the forward and reverse directions is attached to the lower surface of the water tank 4, and a motor pulley 20 is attached to an output shaft 19 of the motor 18. The motor pulley 20 and the drum pulley 17 are the drive belt 2
They are connected by 1. That is, the power for rotating the drum 3 is transmitted to the horizontal shaft 13 via the output shaft 19 of the motor 18, the motor pulley 20, the drive belt 21, and the drum pulley 17.

The water supply means comprises an injection nozzle 25 provided in the baffle 2, a water supply section 26 for sending the washing liquid to the injection nozzle 25, and a supply pipe 27 for connecting the water supply section 26 and the injection nozzle 25. Has been done. Injection nozzle 25
Is a hole of φ2 to 5 mm opened on the top of the hollow baffle 2 and is lined up in a line in the axial direction.

The water supply section 26 is a tank 2 for storing a washing liquid.
8, a pump 30 for pressurizing the washing liquid from the tank 28 and sending it to the circulation pipe 29, and a water supply pipe 32 having a water supply valve 31 connected to the water supply. The pump 30 is driven by a motor different from the drum driving motor 18, and an air intake pipe 3 for mixing air into the washing liquid by the ejector effect between the tank 28 and the pump 30.
3 is interposed. In addition, a detergent dispenser 34 is interposed in the water supply pipe 32, and a water supply sensor including a differential pressure type, electromagnetic type, positive displacement type, ultrasonic type, or other flow rate sensor is attached.

A drainage pipe 36 is provided on the lower surface of the water tank 4 for communicating the drainage port 35 with the tank 28, and a drainage hose 37 is connected to an intermediate portion of the drainage pipe 36 to switch the flow path there. A drain valve 38 is provided so that the washing liquid discharged from the water tank 4 can be guided to the tank 28 and circulated by the pump 30. A lint filter (lint filter) 39 for removing lint from the washing liquid is detachably provided in the middle of the drain pipe 36, and the lint filter 39 for removing the lint filter 39 is provided on the front surface of the washing machine body 6. An outlet 40 is formed. The lint filter 39 is a fine fiber bag-like member, and is inserted so as to close the inside of the drainage pipe 36 to prevent the lint and dust from getting entangled or clogged in the pump 30.

The supply pipe 27 connects the merging portion 41 of the circulation pipe 29 and the water supply pipe 32 to the baffle 2, and penetrates the horizontal shaft 13 to reach the inside of the drum 3.
It branches in three directions toward each baffle 2 and is integrally connected to the baffle 2. The end of the supply pipe 27 on the water supply side is connected to the confluence portion 41 by connecting means.

As shown in FIG. 2, the connecting means is a nipple 50 attached to the end of the supply pipe 27, and a fixed support 52 for rotatably supporting the nipple 50 via an oil seal 51.
And a hose nipple 54 that connects the fixed support body 52 and the merging pipe 53 of the merging portion 41. Fixed support 52
Is fixed to the washing machine body 6 so as to cover the merging pipe 53,
A circular recess 55 is formed on the end face on the water tank side, and a ring-shaped oil seal 51 is fitted into the opening on the water tank side of the recess 55,
The nipple 50 is rotatably fitted in the oil seal 51. Further, the hose nipple 54 is fitted into the opening of the recess 55 on the hose side, and the hose nipple 54 is connected to the confluence pipe 53.
It is screwed to.

A switching valve 56 for supplying either the tap water or the washing liquid circulated from the pump 30 to the jet nozzle 25 is interposed in the merging portion 41. The switching valve 56 includes the water supply pipe 32 and the merging pipe 5.
The type of water supply is switched by rotating between a position that communicates with 3 and a position that communicates the circulation pipe 29 and the merging pipe 53.

In the washing machine constructed as described above, washing,
Motor 18, pump 30 according to each process of rinsing and dehydration
And a control device 5 in which each valve is a microcomputer
7 is driven and controlled, and the condition set based on the input from the operation keys of the operation panel provided on the outer surface of the washing machine body 6 and the output signals of the water supply sensor, the water amount sensor, the temperature sensor, the dirt sensor, etc. Perform each step accordingly. By the way, by driving the pump 30, the injection nozzle 25
Although the washing liquid is jetted from the jet nozzle 25, the jet nozzle 25
Since the laundry S is blocked when it comes to the lower side as it rotates, it cannot be jetted. Therefore, the pump 30 is intermittently driven according to the rotational position of the drum 3 or an opening / closing valve is provided in each of the supply pipes 27 corresponding to each baffle 2 so that the injection nozzle 25 can perform the injection only when it comes to the upper side. Alternatively, the control may be performed so that the on-off valve is opened only when the injection nozzle 25 comes to the upper side. In this way, efficient water supply can be performed without applying a load to the pump 30.

In the above structure, after the laundry S is put in the drum 3, the detergent dispenser 3 is filled with an amount of detergent corresponding to the laundry S.
Put in 4 and start operation. When the water supply valve 31 is opened to start the water supply, the supplied water passes through the water supply pipe 32 while dissolving the detergent, passes through the switching valve 56, and then flows from the confluence pipe 53 to the supply pipe 27 through the recess 55 of the fixed support body 52. Then, the washing water is jetted from the jet nozzle 25 of the baffle 2 toward the laundry S. While the washing water permeates the laundry S, a part of the washing water passes through the hole 1 of the drum 3, the drainage pipe 35 from the drainage port 35 of the aquarium 4, and the lint filter 39 on the way to remove lint. Dust and the like is removed and flows into the tank 28 for storage. At this time, if the motor 18 is driven and the drum 3 is rotated at a low speed for a short time, the water absorption amount of the laundry S is obtained from the difference between the water supply amount and the water amount accumulated in the tank 28, and the material of the laundry S is determined. The amount of laundry can be calculated by multiplying by a coefficient. Then, the operating conditions of washing, rinsing, and dehydration depending on the amount of the laundry S may be automatically set.

When it is detected by the signal from the water supply sensor that the predetermined water supply amount, that is, the water supply amount set according to the amount of the laundry S or the arbitrarily set water supply amount is reached, the water supply valve 31 Is closed and the switching valve 56
Rotates to connect the circulation pipe 29 and the merging pipe 53 to each other. When the washing water in which the detergent is dissolved accumulates in a predetermined amount in the tank 28, the washing operation is performed. The motor 18 is driven to rotate the drum 3, and at the same time, the pump 30 is driven so that the washing water accumulated in the tank 28 is circulated in the circulation pipe 29.
It is led to the injection nozzle 25 through the. Here, when the washing water is sent from the tank 28, the air is mixed into the washing water by the air intake pipe 33, and the washing water (bubble jet) mixed with bubbles is jetted from the jet nozzle 25 at a high pressure.
The laundry S is hit evenly, and the laundry S is impacted to improve the cleaning power. The injected washing water returns to the tank 28 again, and this cycle is repeated several times during the washing operation time.

During the washing operation, since the horizontal shaft 13 is rotating, the supply pipe 27 is also rotating. However, since the nipple 50 at the end of the supply pipe 27 is sealed by the oil seal 51, water leaks. There is no. Moreover, even if the rotation of the drum 3 becomes unbalanced and eccentrically rotates, the supply pipe 27
When the penetrating through the horizontal shaft 13, the supply pipe 27 does not vibrate significantly due to the vibration of the drum 3, and the supply pipe 27 vibrates only a little with the vibration of the water tank 4, and the seal of the supply pipe 27. It is possible to prevent the influence of vibration on the portion, reduce the load on the seal member, and prevent damage to the seal member and water leakage. Therefore, the sealability is improved and the life of the seal member can be extended. With respect to the vibration in the axial direction, the nipple 50 slides along the oil seal 51, so that the sealing performance is maintained.

When such a washing operation is completed, a rinsing operation is started. First, the drain valve 38 is opened to the drain hose side, and the drum 3 is rotated to drain the washing water while dehydrating. After that, the drain valve 38 is closed and the water supply valve 31 is opened to supply water. The subsequent operation is the same as the washing operation. At this time, rinsing may be performed by mixing additives such as a softening agent and a finishing agent with rinsing water as in the case where the detergent is automatically added. After that, when the rinse operation with tap water or the rinse water with circulation is completed,
The drain valve 38 is opened to the drain hose side to drain the rinse water, and the drum 3 is rotated at a high speed to perform a normal dehydration operation.

When the laundry is washed by such a method, the laundry is directly contacted with the washing water or the rinsing water, so that the washing effect and the rinsing effect are enhanced, and the water saving effect can be enhanced since the required amount of water is supplied.

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. For example, even if an O-ring, a mechanical seal, felt, or packing made of leather is used as the seal member, the same effect can be achieved. Further, as a connection between the supply pipe and the merging pipe, the supply pipe is rotatably supported by a fixed support through a bearing, and sealing is performed by a seal member such as an oil seal. You may fit through a ring.

[0029]

As is apparent from the above description, according to the present invention, the water supply means for supplying the washing liquid from the baffle formed on the inner peripheral wall of the drum supplies water to the baffle through the supply pipe penetrating the horizontal shaft. Therefore, even if the rotation of the drum becomes unbalanced and eccentrically rotates, the supply pipe does not vibrate significantly due to the vibration of the drum. Therefore, it is possible to prevent the influence of vibration on the seal portion of the supply pipe, reduce the load on the seal member, and prevent damage to the seal member and water leakage. Therefore, the sealing property is improved, and the life of the sealing member can be extended. Moreover, since the inside of the horizontal axis is piped,
The piping space can be omitted, the space can be saved, and the washing machine can be downsized or the capacity of the drum can be increased.

Further, since the laundry liquid can be directly supplied to the laundry from the baffle, the laundry liquid can be evenly applied to the laundry, the washing effect and the rinsing effect can be enhanced, and moreover, it is necessary. Since only the amount needs to be supplied, the water saving effect can be enhanced.

[Brief description of drawings]

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

FIG. 2 is an enlarged cross-sectional view of a connection portion between a supply pipe and a water supply unit.

[Explanation of symbols]

 2 Baffle 3 Drum 4 Water tank 13 Horizontal shaft 25 Injection nozzle 26 Water supply section 27 Supply pipe 50 Nipple 51 Oil seal 52 Fixed support 53 Confluence pipe 54 Hose nipple

Claims (4)

[Claims] 1. A washing machine main body equipped with a water tub and a drum having a plurality of holes rotatably supported by a horizontal shaft in the water tub, and comprising a baffle formed on an inner peripheral wall of the drum. A drum type washing machine provided with a water supply means for supplying washing liquid, wherein the water supply means supplies water to a baffle through the horizontal shaft. 2. The water supply means comprises a nozzle provided in the baffle, a water supply section for sending a washing liquid to the nozzle, and a supply pipe connecting the water supply section and the nozzle, the supply tube being horizontal. The drum type washing machine according to claim 1, wherein the drum type washing machine penetrates the shaft. 3. The water supply unit is attached to a main body of a washing machine, and a nipple attached to an end of a supply pipe is rotatably supported to the water supply unit via a seal member. 2. The drum type washing machine described in 2. 4. The water supply means is provided with a circulation device for circulating the washing liquid discharged from the water tank to the drum again, and the supply of tap water or the circulating liquid can be switched. The drum type washing machine according to 2 or 3.