JP5493884B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine that includes a laundry tub that is rotatable and accommodates laundry in an elastically supported receiving cylinder, and performs washing, rinsing, and dehydration of the laundry in the laundry tub.

  Conventionally, in such a washing machine, the circulation mechanism that circulates the water in the receiving cylinder with a circulation pump, and the angle at which the circulating water is injected little by little from the front of the washing tub toward the back in front of the washing tub are changed. Equipped with spray nozzles with multiple spray ports, quickly wets the entire garment while controlling the number of revolutions of the washing tub, and biases in clothing caused by wet and non-wet clothing, and in clothing between wet items In order to improve the tumbling effect due to rotation in the washing tub and to prevent the cleaning time and improve the cleaning and rinsing performance, there has been proposed (for example, see Patent Document 1).

  FIG. 5 is a schematic side sectional view showing a circulating water injection method of the conventional drum type washing machine described in Patent Document 1. As shown in FIG. 5, the housing 1, the washing tub 2, the receiving cylinder 3, the motor 4, the circulation pump 5, the water stop valve 6, the drain valve 7, the circulation water channel 8, the water supply valve 9, the through hole 14, the drain pipe 15, a door 16, a motor pulley 20, a drive belt 21, a drive pulley 22, a tank 23, an injection nozzle 24, and a drain port 15. In FIG. 5, the broken line arrow indicates the circulating water to be injected.

  FIG. 6 is a perspective view of the circulating water injection nozzle 24. In FIG. 6, 26 is an inlet of circulating water to be injected, and 27 is an outlet. After an appropriate amount of water is supplied through the water supply valve 9 with respect to the amount of laundry put into the washing tub 2, the motor 4 is driven, and the washing tub 2 rotates at a rotation speed at which the laundry can be tumbled.

  At this time, the motor pulley 20 mechanically connected to the drive shaft of the motor 4 rotates with the rotation of the drive shaft, and power is transmitted to the drive pulley 22 mechanically connected to the washing tub 2 through the drive belt 21. As a result, the driving pulley 22 and the washing tub 2 are rotated. After the washing tub 2 starts rotating and the drain valve 7 is closed and the water stop valve 6 is opened after a certain period of time, the circulation pump 5 is driven to feed the cleaning solution in which the detergent is dissolved into the circulation channel 8. The washing liquid is jetted into the washing tub 2 from the jet nozzle 24.

  As shown in FIG. 6, the opening positions of the plurality of ejection ports 27 are shifted, so that the laundry 16 is ejected from the door 16 of the washing tub 2 in the depth direction, and the laundry is quickly and widely spread over a wide range. It can be wetted, shortening the cleaning time and improving the cleaning and rinsing performance.

JP-A-10-127978

However, in the conventional configuration, the washing water is sprayed onto the laundry from the door side of the washing tub toward the depth direction using the spray nozzle having a plurality of spray ports, and the laundry is washed while wet. When the capacity is small, a part of the sprayed washing water hits the washing tub directly without hitting the clothes and does not contribute to the washing effectively, or when washing high capacity clothes, Only a part of the clothes located in the vicinity of the injection port gets wet, and it is difficult to wet the clothes uniformly over a wide range, and it is difficult to improve the washing performance of the entire laundry.

  In addition, it is difficult to increase the size of the spray nozzle in order to increase the spray area of the washing water or to provide a plurality of spray nozzles because clothes that rotate in the washing tub are entangled with the spray nozzle. Furthermore, by having a large number of injection ports in one nozzle, the pressure loss at the time of water supply from the circulation channel to the individual injection ports also increases, and as a result, less wash water is injected from one injection port. Therefore, it was difficult to wet the laundry quickly and uniformly.

  An object of the present invention is to provide a washing machine having excellent washing performance and rinsing performance by quickly and evenly wetting clothes in a washing tub with washing water.

In order to achieve the above object, a washing machine according to the present invention includes a laundry tub that accommodates and rotates laundry, a receiving cylinder that accommodates the laundry tub, a motor that drives the laundry tub, and the laundry tub or Water supply means for supplying water to the receiving cylinder, a circulation pump for sucking the washing water or rinsing water supplied to the washing tub or the receiving cylinder and feeding it into the washing tub, and the circulation pump from the receiving cylinder and a water circulation passage for discharging the washing water or rinsing water into the washing tub through the front of the receiving cylinder discharge port for discharging the washing water or rinsing water to the washing tub from the water circulation passage a plurality around, the jetting angle of all of said discharge ports is characterized by being configured differently with respect to the rotational axis of the front Symbol tub.

  By having such a configuration, the washing water or the rinsing water discharged from the discharge port is poured into the washing tub over a wide area with a wide angle, and even when the amount of clothing is small, the entire clothing can be uniformly wetted, Cleaning performance and rinsing performance can be improved. Furthermore, even when there is a large amount of clothing, the washing water is poured almost simultaneously and evenly from the entire circumference of the washing tub, so that the clothing gradually moves in the depth direction from the clothing near the front outlet where the discharge port is provided. Thus, it becomes possible to quickly get wet with washing water or rinsing water, thereby suppressing unevenness in washing and rinsing performance of clothes and improving washing performance and rinsing performance.

  The washing machine of the present invention has a wide range of clothes by changing the discharge angle of the washing water or the rinsing water with respect to the rotation axis of the washing tub so that the area where the discharge water overlaps with each other is reduced. It can be quickly and evenly wet, improve the wettability of the entire garment, and improve the cleaning performance and rinsing performance.

1 is a schematic side sectional view of a washing machine according to Embodiment 1 of the present invention. Schematic front view showing the position of the discharge port and the discharge method in Embodiment 1 of the present invention Explanatory drawing of the washing water discharge in Embodiment 1 of the present invention Comparison of cleaning performance between the first embodiment of the present invention and the conventional method Side cross-sectional schematic diagram of a conventional drum-type washing machine The perspective view which shows the circulating water injection nozzle of the conventional drum type washing machine

A first aspect of the present invention is a washing tub that stores and rotates laundry, a receiving cylinder that stores the washing tub, a motor that drives the washing tub, and water supply for supplying water to the washing tub or the receiving cylinder. Means, a circulation pump for sucking the washing water or rinsing water supplied to the washing tub or the receiving cylinder and feeding it into the washing tub, and from the receiving cylinder into the washing tub via the circulation pump and a water circulation passage for discharging the washing water or rinsing water, a plurality of discharge ports for discharging the washing water or rinsing water to the washing tub from the water circulation passage in front around the bush, before SL washing tub the jetting angle of all of said discharge port with respect to the axis of rotation of are those configured differently.

  As a result, washing water or rinsing water discharged from the discharge port is poured into the washing tub over a wide area with a wide angle, and even when the amount of clothing is small, the entire clothing can be evenly wetted, and the washing performance is too easy The performance can be improved. In addition, even when there is a large amount of clothing, washing water is poured from the entire circumference of the washing tub almost simultaneously and evenly, so that the area where the washing water or rinsing water hits not only at the “point” but also at the “face”. Even if it is clothing that is behind the outlet of the washing tub, or clothing that is near the front outlet where the outlet is provided, it is wet in the washing tub by increasing wettability. The space where unoccupied clothing spreads can be made smaller, and if the laundry tub is rotated, the position of the clothing will shift, so it can be quickly wetted in the depth direction with washing water or rinsing water. It is possible to suppress unevenness in washing and rinsing performance of clothes and improve the washing performance and rinsing performance.

  Furthermore, by setting the discharge angle of all outlets with respect to the rotation axis of the washing tub so that the washing water or rinsing water discharged in a fan shape does not overlap, the discharged washing water or rinsing water collides with each other. Therefore, the kinetic energy at the time of discharge is less likely to decline, and it is possible to improve the washing performance and rinsing performance of clothing by acting as energy to strip dirt from clothing or to penetrate deep into clothing fibers. .

  According to a second invention, in the first invention, a plurality of discharge ports are disposed at equal intervals in the upper or lower front periphery of the cylinder.

  Accordingly, the washing water or the rinsing water is evenly discharged to the clothes at substantially the same timing, and the unevenness of the cleaning performance and the rinsing performance can be suppressed regardless of the position of the clothes in the washing tub. In addition, the washing water or the rinsing water is discharged into the washing tub so that it does not overlap in a fan shape, so that the circular cross section of the tub can be covered evenly in the depth direction, regardless of the position of the clothes in the washing tub. Therefore, it is possible to wet almost uniformly, and it is possible to improve cleaning performance and rinsing performance.

  According to a third invention, in the first invention, a plurality of discharge ports are arranged at equal intervals around the entire front circumference of the cylinder.

  As a result, the amount of the washing water or the rinsing water is discharged almost uniformly to the garment, and is discharged in a fan shape from the entire circumference of the washing tub at almost the same timing. It can be uniformly covered with a water film of washing water or rinsing water, so that it can be evenly and quickly wet regardless of the position of the clothes in the washing tub, and the washing performance and rinsing performance can be improved.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the flow rate of washing water or rinsing water discharged from all the discharge ports is set to be substantially the same.

  As a result, the detergent concentration and amount of rinsing water discharged are approximately equal, so that the area that is exposed to the irrigation water has almost the same conditions in the washing and rinsing process, and the variation in washing and rinsing performance of clothing is reduced. The cleaning performance and the rinsing performance can be improved uniformly.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the opening area of the discharge port provided at the upper front periphery of the receiving tube is greater than the opening area of the discharge port provided at the lower front periphery of the receiving tube. The washing machine was wide.

  As a result, the discharge amount of washing water or rinsing water can be made substantially equal regardless of whether the discharge port is at the upper part or the lower part of the receiving cylinder, and the portion where the discharge water hits is almost the same in the washing and rinsing process. Accordingly, it is possible to reduce the variation in the washing and rinsing performance and to improve the washing performance and the rinsing performance uniformly.

  A washing machine according to an embodiment of the present invention will be described below with reference to the drawings to provide an understanding of the present invention. The following description is a specific example of the present invention and does not limit the content of the claims.

(Embodiment 1)
A washing machine according to an embodiment of the present invention is shown in FIG. In FIG. 1, a receiving cylinder 3 that houses a laundry tub 2 that accommodates and rotates laundry is provided inside the washing machine casing 1, and the laundry tub 2 can be rotated by driving a motor 4. It is configured as follows.

  The water supply valve 9 is constituted by an electromagnetic valve. When the water supply valve 9 is opened, water supply is started, and water is supplied into the receiving cylinder 3 through the water supply pipe 11 while dissolving the detergent through the detergent case 10. Washing water is supplied to the laundry in the washing tub 2 provided with the through holes 15.

  Further, the washing water is circulated by driving the circulation pump 5 provided below the receiving cylinder 3 for circulating the washing water supplied into the receiving cylinder 3.

  The circulation water channel 8 communicates with a plurality of discharge ports 13 provided between the tube 3 and the washing tub 2 for receiving the washing water sucked from the receiving tube 3 by the circulation pump 5, and the washing water from the front of the washing tub 2. It is comprised so that can be injected.

  Further, a water stop valve 6 is provided at an upstream position of the circulation pump 5, and a drain valve 7 and a drain pipe for draining the washing water branched from the upstream position of the water stop valve 6 and flowing from the receiving cylinder 3. 15 is provided and the water stop valve 6 is closed, the washing water flowing from the receiving cylinder 3 flows to the drain valve 7 side, and when the water stop valve 6 is opened, it flows from the receiving cylinder 3. The washing water is configured to flow to the circulation pump 5 side.

  In addition, the user can put the laundry in and out of the laundry tub by opening and closing the door 16.

  In the washing machine configured as described above, washing mainly includes three steps of washing, rinsing, and dehydration. The operation in the washing and rinsing steps will be described below.

Dirty clothing is put into the washing tub 2 through a door 17 provided on the front surface of the washing machine. The control means (not shown) rotates the washing tub 2 for a short time, automatically determines the amount of clothes put in based on the amount of torque, etc., and determines the amount of water supply and the washing time. When the water supply amount is determined, the water supply valve 9 is opened to supply water, and the washing water is guided into the receiving tube 3 through the water supply pipe 11 while dissolving the detergent supplied in the designated amount in the detergent case 10. . When the amount of water in the receiving cylinder 3 reaches a predetermined water level, the circulation pump 5 is activated. At this time, the drain valve 7 is closed and the water stop valve 6 is opened so that the washing water can be drawn from the circulation pump 5 and the receiving cylinder 3.

  Washing water collected at the bottom of the receiving cylinder 3 is pumped by the circulation pump 5 and sprayed from the plurality of discharge ports 13 toward the clothes in the washing tub 2 in the direction of the arrow through the circulation water channel 8. If the shape of the plurality of discharge ports 13 is such that the washing water can be discharged at a wide angle (so that water is discharged in a fan shape), the entire clothing can be wetted with the washing water in a short time.

  Moreover, even if it is a form directly discharged from the front surface of the washing tub 2 as a discharge method from the plurality of discharge ports 13, the shape of the front surface of the receiving tube 3 is changed to the shape of the washing tub 2 after being discharged into the receiving tube 3 once. There is no particular problem even if the structure is directed inward and flows into the washing tub 2 while flowing along the wall surface of the receiving tube 3.

  At this time, it is preferable to rotate the washing tub 2 by driving the motor 4 in order to promote the movement of the laundry in the washing tub 2.

  FIG. 2 is a schematic front view of the position of the discharge port 13 and the discharge method in the present invention. In FIG. 2, the washing water or the rinsing water sent out from the circulation water channel 8 by the circulation pump 5 is supplied to a substantially annular discharge water channel 12 continuing from the front to a plurality of discharge ports 13 arranged in the right half and the left half. The water diversion mechanism 17 which divides water is shown.

  Here, the discharge water channel 12 once branched by the water diversion mechanism 17 loses momentum at the time of discharge due to the washing water or the rinse water sent from the circulation pump 5 colliding again inside the discharge water channel 12. It is preferable that the counterclockwise water channel and the clockwise water channel are separately separated so that the washing water or the rinse water does not collide again inside the discharge water channel 12. Moreover, it is preferable that the discharge port 13 is arrange | positioned along the outer periphery of the washing tub 2 at equal intervals.

  FIG. 3 is an explanatory diagram showing a state in which washing water or rinsing water is discharged from the plurality of discharge ports 13.

  The plurality of discharge ports 13 are arranged on symmetrical positions with the center point 19 of the washing tub 2 as the center of the take-out port when viewed from the front on the rotation shaft 18 that is the rotation center of the laundry tub 2 as a symmetric center. In this case, the discharge angle from the upper discharge port 13a with respect to the rotation axis 18 of the washing tub is α, and the discharge angle from the lower discharge port 13b is β. Here, α and β are preferably at different angles. That is, when set at different angles, the area where the discharged washing water or rinsing water intersects and collides decreases, thereby reducing the chance that the kinetic energy possessed by the washing water or rinsing water discharge is lost due to the collision, It is possible to act as a force that removes dirt from the clothing or penetrates deep into the fibers of the clothing.

  In addition, by setting α and β at different angles, the arrival position of the washing water or the rinsing water in the depth direction of the washing tub 2 is changed, so that the washing water or the rinsing water can be uniformly applied to the laundry existing in a wide range. It can be applied and can be wet quickly.

In addition, the washing water or the rinsing water sent from the circulation pump 5 is partially converted into potential energy when being sent to the upper part, or the flow velocity is slowed by the flow path resistance due to passing through a long discharge water channel. Therefore, the circulating flow rate decreases. Therefore, it is preferable to change the area of the discharge port according to the position of the discharge port, and when the water diversion mechanism 17 is below the washing tub 2 or the receiving tube 3, it is provided at the upper half of the front of the receiving tube 3. If the discharge area of the discharge port 13a is larger than the area of the discharge port provided in a place close to the water diversion mechanism 17 (the position in the lower half of the front of the receiving tube 3), washing water or rinsing water due to a decrease in water pressure The discharge amount from the discharge port 13a provided in the upper half position of the receiving cylinder 3 can be prevented, and the discharge amount from the discharge port 13a and the discharge port 13b can be made substantially equal.

  In addition, when the water diversion mechanism 17 is in the upper position of the washing tub 2 or the receiving cylinder 3, since the loss by a positional energy does not generate | occur | produce, it is not necessary to change especially the discharge area of the discharge outlet 13a and the discharge outlet 13b. .

  As shown in FIG. 2 or FIG. 3, the washing water or the rinsing water discharged from the discharge ports 13 arranged at substantially equal intervals on the front peripheral edge of the washing tub 2 spreads in a fan shape and extends in the depth direction of the washing tub 2. The entire circular cross section is projected and the garment can be quickly wetted almost simultaneously regardless of the position, and there is little variation in the washing performance and rinsing performance between the garments, and the washing performance and rinsing. It becomes possible to perform washing with excellent performance.

  In addition, by rotating the washing tub 2 at the time of discharge from the discharge port 13, it is possible to contact the clothes existing under the overlapped clothes, and it is possible to wet more uniformly and quickly, and washing between clothes There is little variation in performance and rinsing performance, and washing with excellent washing performance and rinsing performance can be performed.

  Next, in the rinsing process, water is collected in the receiving cylinder 3 and rinsed, rinsed and rinsed while water is supplied to the receiving cylinder 3, and shower rinsing is performed. This is the process.

  The shower rinsing is a method in which the washing water is sprinkled on the clothing while rotating the washing tub 2 and the moisture containing the detergent is removed from the clothing by centrifugal force. By using the discharge port 13 for discharging the rinsing water, the rinsing water can be bathed in a wide range of clothes, so that rinsing can be performed in a short time and without unevenness, and the rinsing performance can be improved.

  In FIG. 1, a discharge port 13 that discharges the washing water in a fan shape is adopted at the front peripheral edge of the washing tub 2, and a washing machine with a rated capacity of 9 kg is prepared for the experiment. A washing machine of the same rated capacity was prepared for comparison, provided with a discharge port for discharging washing water or rinsing water from the lower two locations while changing the discharge angle.

A cleaning test was conducted using 9.0 kg of simulated laundry specified by JEMA (Japan Electrical Manufacturers' Association), and the cleaning performance was evaluated according to JIS standard contaminated cloth 15 sold by the Laundry Science Association. A sheet is affixed to the test garment, and the reflectance of light before and after washing is measured using a color difference meter ZE-2000 (Nippon Denshoku Industries Co., Ltd.), and the degree of cleaning defined by the following formula 1 is calculated. The comparison was made for each test.
(Formula 1) D = (Rw−R1) / (R0−R1)
In Equation 1, D is the degree of cleaning, Rw is the reflectance after washing the contaminated cloth, R1 is the reflectance before washing the contaminated cloth, and R0 is the reflectance of the raw cloth.

  The test was carried out using eight outlets arranged at the front peripheral edge of the washing tub 2 so that the distance between them was uniform, and the outlets being substantially circular. In addition, the discharge angle was adjusted with respect to the rotation axis of the washing tub, and the overlapping portion of the discharged wash water or rinse water was set to be small. The water temperature was 20 ° C., and the washing time for washing was 14 minutes. Here, the washing time in the conventional method was increased to 17 minutes. Moreover, the discharge water amount was 21 L / min as a total amount in both cases.

  The results are shown in FIG. As a measurement result of the degree of cleaning, the degree of cleaning in the conventional method was 0.364 compared to 0.364 in the present invention. Further, in the 25 measurement results of the cleaning degree, the dispersion (σ) in the conventional method was 0.07, whereas in the present invention, the dispersion (σ) was 0.04, and the result was small.

  As described above, in spite of shortening the washing time, not only the result of the washing degree and the dispersion of the washing degree result (σ) are excellent, the wetting speed of the clothes is increased and the washing performance is improved. It was confirmed that washing with less unevenness in washing becomes possible. That is, according to the present invention, it was confirmed that the improvement in washing performance was achieved in a shorter time.

  As described above, since the washing machine according to the present invention can wet clothes quickly and without unevenness, it is useful in the field of washing machines that require high washing performance and rinsing performance.

2 Washing tub 3 Receptacle 4 Motor 5 Circulating pump 6 Water stop valve 7 Drain valve 8 Circulating water channel 9 Water supply valve (water supply means)
12 Discharge water channel 13, 13a, 13b Discharge port 17 Water diversion mechanism

Claims (4)

A washing tub for storing and rotating laundry, a receiving cylinder for storing the washing tub, a motor for driving the washing tub, water supply means for supplying water to the washing tub or the receiving cylinder, and the washing tub Alternatively, a circulation pump that sucks the washing water or rinsing water supplied to the receiving cylinder and feeds it into the washing tub, and the washing water or rinsing water from the receiving cylinder through the circulation pump into the washing tub. A plurality of outlets for discharging washing water or rinsing water from the circulation water channel into the washing tub in the front periphery of the receiving cylinder, all with respect to the rotation axis of the washing tub The discharge angle of the discharge port is different, and the opening area of the discharge port provided at the upper front periphery of the receiving tube is wider than the opening area of the discharge port provided at the lower front periphery of the receiving tube. Washing machine. The washing machine according to claim 1, wherein the plurality of discharge ports are disposed at substantially equal intervals in a front upper portion or a lower portion of the receiving cylinder. The washing machine according to claim 1, wherein a plurality of the discharge ports are arranged at substantially equal intervals around the entire front circumference of the receiving tube. The washing machine according to any one of claims 1 to 3, wherein flow rates of washing water or rinsing water discharged from all of the discharge ports are substantially the same.