JP2019084092A - Drum type washing machine - Google Patents

Abstract

To provide a drum type washing machine which promotes infiltration of washing water sprayed in a drum into clothing, which increases a mechanical force imparted to the surface of the clothing by the washing water and which provides high washing performance.SOLUTION: The drum type washing machine comprises: an outer tub capable of storing liquid inside; a substantially cylindrical drum which is rotatably supported in the outer tub and in which clothing is stored; a motor rotationally driving the drum; water supply means supplying water to the inside of the outer tub; a circulation pump sucking washing water from the outer tub and delivering the washing water to a water spray nozzle in the drum; and operation control means controlling the motor, the water supply means and the circulation pump. The operation control means executes an operation in which, at least in a part of a washing step, a flow rate of the washing water discharged from the water spray nozzle becomes higher than a circumferential speed of the drum.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a drum-type washing machine.

  In the drum-type washing machine, clothes are placed in a drum which is inclined substantially horizontally or upward, and the washing process, the rinsing process and the dewatering process are performed.

  As a technique relating to washing water and rinsing water scattering during washing, in the following Patent Document 1, "A washing machine is provided with a detergent storage portion and a water supply pump in the middle of a water supply path for supplying the washing water into the washing tank. Water supplied from the water supply source connected to the water supply valve is supplied from the water supply head to the detergent storage unit through the water supply valve and the first water supply pipe to become washing water containing the detergent B, and flows into the water supply pump through the second water supply pipe. The pump stirs and pressurizes the washing water flowing into the third water supply pipe, and supplies the water into the washing tub 2 through the water supply holes and the shower head.

  Further, in Patent Document 2 below, “a drum provided rotatably in a water tank, a motor for driving the drum to rotate, a water supply means for supplying wash water to the water tank, and a water level of the washing water in the water tank are detected. It comprises a water level detection means, a circulation means for circulating washing water in the water tank in the drum, and a control means for controlling processes such as washing, rinsing and dewatering. The control means is a high concentration detergent water before the washing process. Into the water tank, the drum is rotated at a rotational speed at which the centrifugal force is greater than gravity, and the high concentration detergent water in the drum is discharged into the water tank through the laundry, and the high concentration detergent discharged into the water tank Water is sprayed to the laundry in the drum by circulation means. "

JP, 2011-217919, A Unexamined-Japanese-Patent No. 2013-052056

  In the washing machine described in Patent Document 1, the circulation pump is driven at the initial stage of the washing process to disperse the washing water to the clothes in the drum, and in the drum type washing machine described in Patent Document 2, the clothes are in the drum. Washing water is sprayed in a state where it is stuck on the wall. However, while these operations have the effect of making the washing water penetrate the clothes, the mechanical force (mechanical force) that the washing water itself gives to the clothes is small, and the main method to obtain the washing effect is by drum rotation. It was the application of mechanical power to the clothes. That is, the effect of the washing water dispersion itself on soiling of the clothes is small, and there is a possibility that the washing performance per time required for washing may be lowered.

  The present invention has been made to solve the above-described problems, and aims to promote the penetration of washing water into clothes and to increase the mechanical force exerted by the washing water on the clothes surface to obtain high cleaning performance. I assume.

  In order to solve the above problems, the drum-type washing machine according to the present invention includes an outer tub capable of storing liquid therein, and a substantially cylindrical drum supported rotatably in the outer tub and accommodating clothes. A motor for rotationally driving the drum, a water supply means for supplying water into the outer tank, a circulation pump for sucking in the washing water from the outer tank and supplying the washing water to the water spray nozzle into the drum, the drum In the drum type washing machine provided with a motor, the water supply means, and the operation control means for controlling the circulation pump, the operation control means is for at least a part of the washing process of the washing water discharged from the water spray nozzle. It is characterized in that an operation is performed such that the flow velocity is higher than the circumferential velocity of the drum.

  According to the present invention, it is possible to promote the penetration of wash water into clothes, increase the mechanical force exerted by the wash water on the clothes surface, and obtain high cleaning performance.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external appearance perspective view which shows the drum type washing-drying machine in connection with the example of a 1st embodiment. It is the schematic diagram which looked at the housing inside of the drum type washing-drying machine shown in FIG. 1 from the right side. It is a perspective view partially transparent view which shows the basic structure in connection with the washing water circulation in the washing process of the drum type washing-drying machine shown in FIG. It is a flowchart which shows control of a part of washing process in the drum-type washing-drying machine as described in FIG. It is the model which looked at the inside of the drum-type washing-drying machine shown in FIG. 1 from the front, and it has extracted and shown the basic element regarding the clothes washing at the time of a washing water spraying process. It is a figure which shows typically the collision of the wash water at the time of a washing water spraying process, and clothing in the drum type washing-drying machine of FIG. It is a time chart which shows control of a washing water spraying process in the drum type washing and drying machine shown in FIG. It is a time chart which shows control of a washing water spraying process in the drum type washing and drying machine shown in FIG. In the drum type washing and drying machine in connection with the example of a 2nd embodiment, it is a time chart which shows control of a washing water spraying process. The drum type washing-drying machine in connection with the example of a 2nd embodiment WHEREIN: It is the model which looked at the inside of the drum-type washing-drying machine at the time of a washing water spraying process from the front, and extracts and shows the basic element regarding clothing washing. In the drum type washing and drying machine in connection with the example of a 2nd embodiment, it is a time chart which shows control of a washing water spraying process. In the drum type washing and drying machine in connection with the example of a 3rd embodiment, it is a time chart which shows control of a washing water spraying process. It is the model which looked at the inside of the drum type washing-drying machine in connection with the example of a 3rd embodiment from the front, and extracts and shows the basic element about clothes washing at the time of a swing washing process. In the drum type washing and drying machine in connection with the example of a 3rd embodiment, it is a flow chart which shows control of a part of washing process. It is the perspective view which extracted a part of basic structure of the drum type washing-drying machine in connection with the modification of 3rd Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, although it demonstrates using a drum-type dryer below, the same may be said of the drum-type washing machine which does not have a drying function. Moreover, although coordinate axes pointing up and down, front and back, and left and right are attached to each drawing, this is a direction set for convenience for the sake of explanation, and in all the embodiments described below, these axial directions It is not limited to Furthermore, although the objects of washing, rinsing, dewatering and drying are not limited to clothes, in the following description, the objects of washing, rinsing, dewatering and drying will be referred to as clothes.

First Embodiment
A first embodiment of the present invention will be described using FIGS. 1 to 3. FIG. 1 is an external perspective view showing a drum-type washing and drying machine according to a first embodiment. FIG. 2 is a schematic view of the casing of the drum-type washer / dryer shown in FIG. 1 as viewed from the right side. FIG. 3 is a perspective partially transparent view showing a basic structure involved in washing water circulation in the washing step of the drum-type washing and drying machine shown in FIG.

  First, the appearance of the drum-type washer / dryer 100 that performs washing, rinsing, dewatering, and drying will be described. As shown in FIG. 1, a frame is formed by combining a side plate 1a mainly made of a steel plate and a resin molded product and a reinforcing material (not shown) on the top of a base 1h, and a front cover 1c, The housing 1 is configured by attaching the lower front cover 1 f and the upper surface cover 1 e. The front cover 1c is provided with a slot 1g for taking in and out clothes and a door 9, and a back cover 1d is attached to the back. The door 9 is obtained by fixing a door glass 9a to a door frame 9b, and is attached to the housing 1 by a hinge 9c. By pushing the door opening button 9d, the lock mechanism (not shown) is released, the door 9 is opened, and the door 9 is locked by pressing the door 9 against the front cover 1c.

  The operation panel 12 at the upper center of the housing 1 is electrically connected to a control device (not shown) for sequentially controlling the operation, and performs setting of the operation course and display of the operation state. The upper left side of the housing 1 is provided with a extractable detergent container 14. Moreover, the water supply hose connection port 40 from a water tap is provided in the upper surface cover 1e.

  As shown in FIG. 2, an outer tank 2 for storing water is supported in a vibration-proof manner via a damper 5 and an auxiliary spring 6 inside the housing 1, and includes a drum 3 for storing clothes. The drum 3 is formed in a substantially cylindrical shape having a back surface, and has a large number of small holes (not shown) for centrifugal dehydration and ventilation in a cylindrical portion which is a side wall. The drum 3 is rotatably attached via a shaft 211. A motor 215 attached to the back of the outer tub 2 is connected to the shaft 211, and the drum 3 is rotated forward by the motor 215 (the drum type washing / drying machine 100 is It is rotationally driven in both directions, that is, clockwise when viewed from the front, and reverse (counterclockwise when the drum-type washer / dryer 100 is viewed from the front). A plurality of lifters 209 are provided on the inner peripheral wall of the drum 3. In addition, a cylindrical fluid balancer 208 is provided on the outer periphery of the opening of the drum 3 in order to reduce the vibration due to the unbalance of the clothes at the time of dewatering.

  The outer tank 2 is formed in a substantially cylindrical shape having a front surface and a rear surface, and is provided with an outer tank opening 23 for taking in and out clothes on the front surface. The outer tank opening 23 and the inlet 1g of the housing 1 are connected by a bellows 10 which is an annular packing, and are sealed by water when the door 9 is closed. Further, the inlet 1g of the housing 1, the opening 23 of the outer tank 2 and the opening 15 of the drum 3 communicate with each other, and opening and closing the door 9 enables the clothes to be taken in and out of the drum 3. .

  One end of a water supply hose 17 is connected to the outer tank 2 via a water supply valve 16 and a detergent container 14 which are water supply means, and the water supply valve 16 is opened to supply wash water to the inside of the outer tank 2. Further, a drainage port 21 is provided at the bottom of the water receiving portion 54 of the outer tank 2, and a drainage hose 26 is connected to the drainage port 21. The drainage hose 26 has a drainage valve 27 in the drainage path, and the washing water in the outer tank 2 can be drained by opening the drainage valve 27. The drainage hose 26 is also connected upstream to the drainage valve 27 and is also connected to a circulation pump 18 for drawing up the washing water to the upper portion of the outer tank 2 and scattering it to the clothes in the drum 3.

  Further, an air chamber 47 communicating with the water receiving portion 54 of the outer tank 2 is provided, and a water level sensor (pressure detection means) 45 is connected to the air chamber 47 via a tube 48. For example, when the pressure is applied to the diaphragm and the inductance changes, the water level sensor 45 changes the oscillation frequency, and the pressure in the outer tank 2 may be detected by detecting the oscillation frequency. The water level sensor 45 detects the water level of the washing water in the outer tub 2 at the washing step and the rinsing step, and detects the pressure in the outer tub 2 at the drying step.

  As shown in FIG. 3, the circulation pump 18 is fixed to the lower side of the housing base 1 h side than the outer tank 2. The washing water 95 enters the suction port side of the circulation pump 18 through a lint filter (not shown) from the drainage port 21 (see FIG. 2) of the water receiving portion 54 provided at the lower part of the outer tank 2. After the pressure is increased, the water is sprayed from the water spray nozzle 231 into the drum 3. In the present embodiment, the water spray nozzle 231 is located on the outer tank 2 above the left side of the central axis of the drum 3 as viewed from the front of the drum-type washer / dryer 100 and on the left side of the drum washer / dryer 100. It is formed in the position of. The sprayed washing water 95 collides with the inner wall surface of the drum 3 or the clothes 50.

  The circulation pump 18 discharge port (not shown) is connected by a shower duct (not shown) inlet whose end is a water spray nozzle 231 and a bellows hose (not shown). Here, instead of the bellows hose, a pressure-resistant hose may be used, and in this case, hose deformation (bulge) due to an increase in the internal pressure of the hose when the circulation pump 18 is driven at a high rotation speed (for example, 4000 r / min) is reliably prevented. And can increase the safety of the device.

  Next, components related to air circulation in the drum-type washer / dryer 100 will be described. As shown in FIG. 2, a blower duct 29 is installed in the up and down direction inside the back of the housing 1. Further, a filter unit 36 and a blower unit 35 are provided in the upper part in the housing 1. The filter unit 36 and the blower unit 35 are fixed to the housing 1 apart from the outer tank 2. The air inlet (not shown) of the filter unit 36 is connected to the upper portion of the air duct 29, and the outlet (not shown) of the filter unit 36 is connected to the air inlet (not shown) of the air unit 35. ing. The filter unit 36 includes a mesh filter (not shown) for removing lint when circulating air, and the blower unit 35 includes a blower fan (not shown) and a heater as a heating means of circulating air. 28 is included. The discharge port (not shown) of the blower unit 35 is connected to the blower path 31 into the drum 3.

  An air inlet 30 is provided on the back of the outer tank 2. The lower end portion of the air flow duct 29 is connected to the air inlet 30 by a rubber bellows tube 32 and is in communication with the outer tank 2. By connecting the air inlet 30 and the air duct 29 with the bellows pipe 32, it is possible to absorb the displacement due to the rocking of the outer tank 2.

  An overflow hose 205, which is a drainage means, is attached to the air duct 29, and the overflow hose 205 merges with the drainage hose 26 on the downstream side of the drainage valve 27.

  In the drying step, the air in the drum 3 and the outer tank 2 flows from the air inlet 30 to the air flow duct 29, the filter unit 36, the air flow unit 35, and the air flow path 31 in this order by operating the air flow unit 35. And, the air is circulated by repeatedly blowing out into the outer tank 2 and flowing again to the intake port 30.

  The air duct 29 has a role as a water cooling dehumidifying mechanism, which will be described in detail below. A water injection port 80 is provided at the upper portion of the air duct 29, and the water injection port 80 is connected to a water cooling dehumidifying water supply valve (not shown) by a tube (not shown). Water is poured from the water injection port 80 into the air duct 29 so that the poured water exchanges heat with the air passing through the inside of the air duct 29, thereby condensing moisture in the air and dehumidifying it.

  Temperature sensors (not shown) are provided at the air inlet and the air outlet of the blower unit 35. If necessary, the temperature of the circulating air can be monitored by the temperature sensor and the output of the heater 28 can be changed to adjust the blowing temperature. Although the heater 28 is used as the heating means in the present embodiment, a heat pump may be used as the heating means, and in this case, it is not necessary to provide a water cooling dehumidifying mechanism in the air duct 29.

  In the above configuration, control and operation from the washing process to the dewatering process of the drum-type washing and drying machine 100 will be described in detail with reference to FIGS. 1 to 8. FIG. 4 is a flowchart showing control of part of the washing process in the drum-type washer / dryer shown in FIG. FIG. 5 is a schematic view of the inside of the drum-type washer / dryer shown in FIG. 1 as viewed from the front, and shows basic elements relating to washing of clothes in the washing water spraying step. FIG. 6 is a view schematically showing a collision between wash water and clothes in the washing water spraying step in the drum-type washing and drying machine shown in FIG. FIGS. 7 and 8 are time charts showing control of a washing water spraying process in the drum-type washer / dryer shown in FIG.

  The door 9 is opened, the clothes 50 are put into the drum 3, and after a predetermined amount of detergent is put into the detergent container 14, the operation is started (step S101). Thereafter, the water supply valve 16 is opened with the drain valve 27 closed, and the supplied water enters the outer tub 2 together with the detergent via the detergent container 14 and the water supply hose 17 (step S102). In step S103, it is determined whether water has been supplied to a prescribed amount, water supply is stopped (step S104), and the process proceeds to the washing water infiltration step (step S105). In the washing water penetration step, the circulation pump 18 is appropriately driven at a predetermined number of rotations, and the washing water 95 is dispersed to the clothes 50 in the drum 3. An average value of discharge flow velocity of the washing water 95 (hereinafter referred to as "average discharge flow velocity") in the washing water penetration step is set to V0. Here, the discharge flow velocity of the washing water 95 refers to a value obtained by dividing the washing water amount Q (m 3 / s) discharged from the water sprinkling nozzle 231 per unit time by the area A (m 2) of the water sprinkling nozzle 231 .

  Here, the drum 3 may be controlled to repeat forward rotation, stop, reverse rotation, and stop during the clothes wetting process, in which case washing to the clothes 50 is performed by spraying the washing water 95 while stirring the clothes 50. Water penetration is promoted and higher cleaning performance can be obtained.

  After the washing water infiltration process, the water supply valve 16 is opened again to supply water to a specified amount (steps S106 to S108), and the process proceeds to the washing water spraying process (step S109). At this time, the prescribed amount in step S107 may be set equal to the prescribed amount in step S103, or may be set larger than the prescribed amount in step S103.

  In the washing water spraying process, the circulation pump 18 is appropriately driven at a predetermined rotational speed while the normal rotation, the stop, the reverse rotation, and the stop of the drum 3 are repeated, and the washing water 95 is dispersed to the clothes 50 in the drum 3. At this time, the circulation pump 18 is controlled so that the maximum value of the discharge flow velocity of the washing water 95 (hereinafter, “maximum discharge flow velocity”) Vout (70) becomes larger than the peripheral velocity Vd (75) of the drum 3. Here, the area where the washing water 95 collides with the clothes 50, for example, the vicinity of the point where the extension line of the discharge direction of the washing water 95 intersects the surface of the clothes 50, is referred to as a "collision area". When the washing water 95 has the maximum discharge flow velocity Vout (70), the flow velocity at the moment when the washing water 95 collides with the clothes 50 (hereinafter "collision flow velocity") is Vcol (74), and the collision flow velocity Vcol (74) is the maximum. It is assumed that it is approximately the same as the discharge flow velocity Vout (70). The circumferential velocity Vc (76) of the clothing 50 surface in the collision area is different depending on the distance between the drum 3 rotation center 61 and the clothing 50 surface, that is, the overlapping condition of the clothing 50, but the circumferential velocity Vd (75) of the drum 3 It will never grow. The following description will be made on the assumption that the peripheral velocity Vc (76) on the surface of the clothes 50 is maximum, that is, the peripheral velocity Vd (75) of the drum 3 is equal.

  FIG. 6 is a view schematically showing a collision between the wash water 95 and the clothes 50 at the washing water spraying step in the embodiment, and shows the wash water 95 as an aggregate of discrete water droplets 130. As shown in FIG. Here, a position where one of the water droplets 130 constituting the water flow 95 collides with the surface of the clothing 50 at a certain moment is called a “collision point” 131, and the water droplet 130 moves with the clothing 50 in contact with the collision point 131. Do.

  6A to 6C are cases where the maximum discharge flow velocity Vout (70) is smaller than the circumferential velocity Vd (75) of the drum 3, and the traveling velocity of the water droplet 130 is smaller than the traveling velocity of the collision point 131. Sequentially move in the rotational direction of the drum 3 without overlapping.

  6D to 6F, the maximum discharge flow velocity Vout (70) is larger than the drum 3 circumferential velocity Vd (75), and the advancing speed of the water droplet 130 is higher than the advancing speed of the collision point 131. The water droplet 130 acts in an overlapping manner in the vicinity of 131. That is, it is possible to increase the water droplets 130 colliding per unit time per unit area, to obtain a high cleaning effect, and to reduce uneven washing.

  In the above description, the collision phenomenon between the washing water 95 and the clothes 50 is described focusing on the magnitude of the maximum discharge flow velocity Vout (70) and the circumferential velocity Vd (75) of the drum 3. The cleaning effect is described while explaining the behavior of A part of the collided washing water 95 becomes a flow in the direction of penetrating the clothes 50 (hereinafter referred to as “penetration flow”) and a part becomes a flow in the direction along the surface of the clothes 50 (hereinafter referred to as “surface flow”). The penetration flow has the effect of permeating the washing water 95 into the clothing 50 and making the soil on the clothing 50 easy to be detached, and the surface flow provides mechanical force to rub the surface of the clothing 50 and has the effect of removing the soiling is there.

  When the maximum discharge flow velocity Vout (70) is larger than the peripheral velocity Vd (75) of the drum 3, the water droplets 130 of the washing water 95 per unit area per unit time increase as described above and the penetration of the washing water 95 increases. Since the flow increases, in addition to the effects of gravity and centrifugal force, the collision of the washing water 95 itself promotes the penetration of the washing water into the clothes 50. In addition, since the surface flow is also increased, the mechanical force that the wash water 95 itself exerts on the surface of the clothes 50 can be increased, and the removal of stains from the clothes 50 can be promoted.

  The component parallel to the circumferential velocity Vd (75) direction of the collision region may be configured to be larger than the circumferential velocity Vd (75) of the collision region with respect to the maximum discharge flow velocity Vout (70) of the washing water 95. Specifically, the discharge direction of the washing water 95 may be changed, or the driving rotational speed of the circulation pump 18 may be changed. Under this configuration, the collision velocity Vcol (74) has a positive relative velocity in the circumferential velocity direction of the collision region, regardless of whether the drum 3 is forward or reverse. Therefore, the mechanical force exerted by the surface flow on the surface of the garment 50 can be further increased to achieve high cleaning performance.

  In the washing water spraying step, for example, the operation may be controlled as in the time chart shown in FIG. The circulation pump 18 is driven while repeating the normal rotation (40 r / min), the stop, the reverse rotation (40 r / min) and the stop of the drum 3. The drum 3 is rotated to repeat the scraping and dropping of the clothes 50, so that the effect of tap washing can be obtained, and furthermore, the washing effect by the spraying of the washing water 95 can be obtained as described above.

  Also, the operation may be controlled as shown in the time chart shown in FIG. Here, the circulation pump 18 is stopped in synchronization with the stop of the drum 3. By this control, it is possible to suppress the foaming due to the collision of the washing water 95 against the stationary clothes 50, and to prevent the foam cushion from reducing the effect of tapping and washing, so that higher washing performance can be obtained. Furthermore, since a decrease in the amount of washing water supplied to the circulation pump 18 can be prevented and stable washing water 95 spraying can be performed, a large mechanical power can be continuously applied to the clothes 50 to obtain high washing performance. . The time charts shown in FIGS. 7 and 8 are merely examples of the control of the washing water spraying process, and for example, the control of both may be appropriately combined and executed.

  Here, the maximum discharge flow velocity Vout (70) of the washing water 95 in the washing water spraying process may be controlled to be larger than the average discharge flow velocity V0 of the washing water 95 in the clothing wetting process. For example, it may be operated such that the average number of rotations of the circulation pump 18 in the washing water spraying process is smaller than the maximum number of rotations of the circulation pump 18 in the washing water spraying process. In this case, the washing water spraying step can be carried out after the washing water 95 is sufficiently permeated into the clothes 50 while suppressing the power consumption associated with the driving of the circulation pump 18 in the clothes wetting step. Therefore, a large mechanical force is applied to the surface of the garment 50 including the dirt that has become easily detached through the garment wetting step, and both suppression of power consumption and high cleaning performance can be achieved.

  After the washing water spraying process is performed for a predetermined time, the process proceeds to the subsequent processes (step S110). Here, as a process after the washing water spraying process, a washing process may be executed by appropriately combining the rotation of the drum 3 and the driving of the circulation pump 18, or the rinsing process may be performed.

  After the washing step, a rinsing step and a dewatering step are performed. In this step, the drainage valve 27 is first opened, and the washing water in the outer tub 2 and the air duct 29 is drained to the outside of the machine through the drainage hose 26. Next, the drum 3 is rotated in one direction, and after reaching a predetermined number of rotations, the water contained in the clothes 50 is dewatered by rotating for a predetermined time. After the dewatering process is performed for a predetermined time, the water supply valve 16 is opened and the water is supplied through the detergent container 14 and the water supply hose 17 to be injected into the outer tank 2 and the rinsing process is performed. In this rinse step, similar to the washing step described above, the operation of normal rotation, pause, reverse, pause of the drum 3 is repeated, and the circulation pump is appropriately driven to spray the rinse water to the clothes 50 Run for hours Thereafter, the above-described dewatering step and rinsing step are repeated a predetermined number of times, and the final dewatering step is started. Also in the final dewatering step, the water contained in the clothes 50 is dewatered by rotating the drum 3 in one direction.

  As is clear from the above description, in the present embodiment, the penetration of the wash water 95 into the clothes 50 is promoted, and the mechanical force that the wash water 95 gives to the clothes 50 surface is increased to achieve high cleaning performance. You can get it.

Second Embodiment
FIGS. 9 and 11 are time charts showing control of the washing water spraying process in the drum type washing and drying machine according to the second embodiment. FIG. 10 is a schematic view of the inside of a drum-type washer / dryer at the time of a washing water spraying step in the drum-type washer / dryer according to the second embodiment, viewed from the front, and basic elements relating to washing of clothes are extracted. It shows. Substantially the same parts as those of the first embodiment are indicated by the same reference numerals and their explanation is omitted, and only different points will be explained.

  Operation control of the washing water spraying process in the present embodiment will be described with reference to FIG. First, the drum 3 is normally rotated at about 40 r / min, and the rotation number is gradually increased to reach about 80 r / min, and the rotation number is maintained for a fixed time. Thereafter, after the drum 3 is temporarily stopped, the drum 3 is similarly reversed. Thereafter, forward rotation, stop, reverse rotation and stop of the drum 3 are repeated in the same manner. While the rotation speed of the drum 3 is increased, stirring is performed by scraping and dropping the clothes 50, and while the drum 3 is rotated at 80 r / min, the clothes 50 have an inner wall surface as shown in FIG. It will be attached to Thus, while controlling the rotation of the drum 3, the circulation pump 18 is driven to perform control such that the relationship between the maximum discharge flow velocity Vout (70) of the washing water 95 and the circumferential velocity Vd (75) of the drum 3 described above is established. Do.

  As described above, when the operation is controlled, it is possible to sequentially replace the surface of the clothes 50 to which the washing water 95 applies mechanical power by stirring the clothes 50 one after another, and high washing with reduced washing unevenness of the entire clothes 50 An effect is obtained. In addition, when the total time of the washing process is set equal to that of the first embodiment, the time for tapping and washing can be shortened by the amount of time that the clothes 50 are attached to the inner wall surface of the drum 3, It is possible to reduce the stiffness of the clothing 50 that results.

  Here, as in the first embodiment, the washing water spraying process may be controlled as shown in FIG. By stopping the circulation pump 18 in synchronization with the stop of the drum 3, it is possible to suppress foaming due to the collision of the washing water 95 on the stationary clothes 50 and to prevent the foam cushion from reducing the tapping effect. , Higher cleaning performance can be obtained. Furthermore, since a decrease in the amount of washing water supplied to the circulation pump 18 can be prevented and stable washing water 95 spraying can be performed, a large mechanical power can be continuously applied to the clothes 50 to obtain high washing performance. .

Third Embodiment
FIG. 12 is a time chart showing control of the washing water spraying process in the drum type washing and drying machine according to the third embodiment. FIG. 13 is a schematic view of the inside of a drum-type washer / dryer according to the third embodiment as viewed from the front, and shows basic elements related to washing of clothes during a swing washing process. FIG. 14 is a flowchart showing a control of part of the washing process in the drum-type washer / dryer according to the third embodiment. Substantially the same parts as those of the first embodiment are indicated by the same reference numerals and their explanation is omitted, and only different points will be explained.

  In the present embodiment, first, the drum 3 is forwardly rotated at about 30 r / min and then immediately reversely rotated at about 30 r / min. At this time, the normal rotation and the reverse rotation of the drum 3 are performed at an angle in a range in which the clothes 50 in the drum 3 do not roll. The circulation pump 18 is driven while controlling the rotation of the drum 3 as described above, and the relationship between the washing water 95 maximum discharge flow velocity Vout (70) and the circumferential velocity Vd (75) of the drum 3 is controlled. As a result, as shown in FIG. 13, the clothes 50 are located at the lower part of the drum 3 and swing while maintaining a state in which a certain surface is exposed to the center side of the drum 3, and the washing water 95 collides . Therefore, it is possible to obtain particularly high cleaning performance by continuously applying the mechanical force due to the collision of the washing water 95 to a specific area of the clothes 50.

  Further, since the clothes 50 are collectively located at the lower part of the drum 3, the washing water penetration to the entire clothes 50 is promoted along with the spraying of the washing water 95. Therefore, even in the portion of the clothes 50 which is not exposed to the center side of the drum 3, the dirt is easily detached from the clothes 50 by the penetration of the washing water 95, and a high cleaning effect can be obtained.

  The washing process in this embodiment will be described in detail with reference to FIG. As described above, the washing method of blowing the washing water 95 while swinging the drum 3 together with the clothes 50 is called “swing washing”.

  The door 9 is opened, the clothes 50 are put into the drum 3, and after a predetermined amount of detergent is put into the detergent container 14, the washing is started (step S111). At this time, it is assumed that the laundry is started in a state in which the laundry which is particularly dirty and which has a high cleaning effect as compared to the other laundry is disposed at the top. Next, 0 is substituted in the swing washing counter in step S112. Thereafter, water supply of a prescribed amount is performed in steps S113 to S115. In step S116, the swing washing is performed, and after a predetermined time (step S117), the swing washing is stopped and 1 is added to the swing washing counter (step S118). In step S119, it is determined whether the value of the swing washing counter has reached a predetermined value, and if less than the predetermined value, the process returns to step S113, and if it has reached the predetermined value, the process proceeds to the subsequent steps (step S120).

  The number of swing washings may be one, or may be multiple, with gradual water supply. In the case of carrying out swing washing multiple times, high concentration washing water 95 is sprayed to the clothes 50 in the first swing washing to make the stains of the clothes 50 easy to be detached, and the washing water 95 of the subsequent swing washing is sprayed. Can be used to scrape dirt, resulting in high cleaning performance. This is because when the circulation pump 18 is driven at a certain rotation speed, the discharge amount increases as the amount of water supplied increases, that is, the discharge flow rate of the washing water 95 increases and the mechanical force applied to the surface of the clothing 50 increases. is there.

  In step S120, if the washing process combining the rotation of the drum 3 and the driving of the circulation pump 18 is appropriately performed, the washing water 95 penetrates and exerts a mechanical force on the entire clothes 50 where soiling has become easy to be detached. High washing effect can be obtained.

  As described above, in the present embodiment, by driving the circulation pump 18 continuously while swinging the drum 3, while maintaining the cleaning performance of the entire clothes 50, it is possible to It is possible to bring about a high cleaning effect.

<Modification>
FIG. 15 is a perspective view of a part of the basic structure of a drum-type washing and drying machine according to a modification of the third embodiment. Hereinafter, substantially the same parts as those of the third embodiment are denoted by the same reference numerals, and the description thereof is omitted, and only different points will be described. In the present embodiment, the laser irradiation device 84 is provided on the outer tank 2 and the laser light 85 visually indicates an area where the washing water 95 collides with the clothes 50 during the swing washing process. By marking the collision area of the washing water 95, particularly when the clothes 50 are put into the drum 3, the soiled portion can be surely disposed in the collision area of the washing water 95, and the desired washing result is obtained. be able to.

  The present invention is not limited to the embodiment described above, but includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to one having all the described configurations. In addition, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and to add the configuration of another embodiment to the configuration of one embodiment. Is also possible. Further, with respect to a part of the configuration of each embodiment, it is possible to add / delete / replace the configuration of another embodiment.

  In addition, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably. For example, although the above embodiment has been described using a drum-type washer / dryer, the same applies to a drum-type washing machine having no drying function.

Reference Signs List 1 housing 2 outer tank 3 drum 18 circulation pump 50 clothes 70 maximum discharge flow velocity Vout
74 Impact speed of washing water and clothing Vcol
75 drum circumferential speed Vd
76 Circumferential velocity Vc of collision area between washing water and clothes
84 laser beam irradiation device 85 laser beam 95 washing water 100 drum type washing and drying machine 130 water droplets 131 forming washing water collision point

Claims (3)

An outer tank capable of storing liquid inside;
A substantially cylindrical drum rotatably supported in the outer tank and containing the clothes;
A motor that rotationally drives the drum;
Water supplying means for supplying water into the outer tank;
A circulation pump which sucks in washing water from the outer tank and feeds the washing water to a water spray nozzle into the drum;
Operation control means for controlling the motor, the water supply means, and the circulation pump;
The drum type laundry according to claim 1, wherein the operation control means executes an operation such that the flow velocity of the washing water discharged from the water sprinkling nozzle is larger than the circumferential velocity of the drum at least in part of the washing step. Machine. In the drum type washing machine according to claim 1,
The operation control means is a component of the wash water discharged from the water sprinkling nozzle, at least in part of the washing process, a component parallel to a circumferential velocity direction of a region where the wash water collides with the clothes, What is claimed is: 1. A drum-type washing machine characterized by performing an operation that is greater than the circumferential speed of the area that collides with clothing. The drum-type washing machine according to claim 1 or 2,
A clothing wetting step; and a washing water spraying step performed after the clothing wetting step;
The drum type washing machine characterized in that the maximum value of the discharge flow velocity of the washing water in the washing water spraying step is larger than the average value of the discharge flow velocity of the washing water in the clothing wetting step.

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