JP6518636B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine for washing clothes and the like.

  In a washing machine, dirt adheres to the inner tank and the outer tank. In particular, dirt accumulated over a long period of time is hard to stick to the inner and outer tanks and to fall off. In Unexamined-Japanese-Patent No. 2015-29812 (patent document 1), the wash liquid is heated up with the sheathed heater with which the outer tank was equipped, the detergent component is activated, and the cleaning power is improved.

JP, 2015-29812, A

  However, in the configuration of Patent Document 1, since the sheathed heater needs to be provided at a position to be in contact with the washing liquid, there is a possibility that the connection portion between the sheathed heater and the outer tub may leak water. Further, when the sheathed heater is heated, scales are deposited on the heat transfer surface of the sheathed heater. Since the thermal conductivity of the scale is very small and heat is less likely to be transmitted to the washing liquid, the amount of heat required to raise the temperature of the washing liquid increases and the efficiency is degraded.

  An object of the present invention is to provide a washing machine which ensures safety against water leakage and efficiently carries out bath cleaning.

In order to solve such problems, for example, a washing machine according to the present invention includes an outer tub for storing water inside, an inner tub rotatably supported in the outer tub, and in which clothes are accommodated, A blower unit having a motor for rotationally driving the inner tank, a water supply unit for supplying water into the outer tank, a water level detection unit for detecting the water level in the outer tank, a fan impeller and a driving fan motor; An outlet for blowing out the wind generated by the blowing unit into the inner tank, a heating means for making the wind generated by the blowing unit a warm air, and the tank cleaning by controlling the motor, the blowing unit and the heating means The operation control means capable of executing an operation and a temperature detection means for detecting the temperature of the washing liquid in the outer tank are provided, and the tank washing operation is performed by rotating the washing liquid in the outer tank by the inner tank. Take up the outer tank and the inner tank A high speed stirring step of washing has a heating step of heating the washing liquid in the outer tank, the generated hot air by the heating means to heat the washing liquid in the outer tank, at least the temperature sensing The high speed stirring step and the heating step are alternately repeated until the means reaches a predetermined temperature .

  According to the present invention, it is possible to provide a washing machine that ensures safety against water leakage and efficiently carries out bath cleaning.

It is an appearance perspective view showing a washing machine concerning the present invention. It is a side view showing roughly the internal structure of the case of the washing machine concerning the present invention. It is a rear view which shows roughly the internal structure of the housing of the washing machine which concerns on this invention. It is a perspective view which shows the 1st circulation pump and peripheral flow path of a washing machine. It is a top view when the 1st circulation pump and the 2nd circulation pump are seen from the upper part. It is a perspective view when the circulation flow path of a washing machine is seen from the back side of an outer tub cover. It is a top view which shows the internal structure of the housing | casing of the washing machine of this invention. It is a front view which shows the connection state of an outer tank cover and a ventilation unit. A hot-air duct is shown, (a) is a perspective view, (b) is a side view, (c) is a bottom view, (d) is a cross-sectional view taken along the line B-B in (c). It is the sectional view on the AA line of FIG. It is a block diagram of a control device of a washing machine concerning the present invention. It is process drawing which shows operation | movement of the washing machine which concerns on this invention.

  Next, the washing machine of the embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the following description, front, rear, upper, lower, left, and right directions are based on front, rear, upper, lower, left, or right directions shown in FIG.

  FIG. 1 is an external perspective view showing a washing and drying machine according to the present invention.

  As shown in FIG. 1, the washing machine S is provided with a casing 1 that constitutes an outer shell. The housing 1 includes left and right side plates 1a and 1b, a front cover 1c, a back cover 1d (see FIG. 2), an upper cover 1e, a front lower cover 1f, and a base 1h. Also, in the housing 1, the left and right side plates 1a and 1b are joined by a U-shaped upper reinforcement (not shown), a front reinforcement (not shown) and a rear reinforcement (not shown). , Has a box shape including the base 1h.

  At substantially the center of the front cover 1c, a door 9 is provided for closing an insertion opening for taking in and out the laundry. Further, at the upper center of the front cover 1c, an operation panel 6 provided with a power switch 39, operation switches 13, 15, an indicator 14 and the like is provided. The operation panel 6 is electrically connected to a control device 60 (see FIG. 2) provided at the lower part of the housing 1.

  FIG. 2 is a side view schematically showing the internal structure of the case of the washing machine of the present invention.

  As shown in FIG. 2, the washing machine S includes a housing 1, an outer tub 2 supported with vibration isolation in the housing 1, a rotary drum 3 rotatably supported in the outer tub 2, and a rotation A drum motor 4 (see FIG. 3) for driving the drum 3 to rotate, a blower unit 51, a blower outlet 52 serving as an inlet for blowing out the wind generated by the blower unit 51 into the rotary drum 3, A heater 51b for making warm air warm, a first washing liquid supply means 53 for supplying washing liquid into the rotary drum 3, and a second washing liquid supply means 54 for supplying washing liquid to the upstream side of the outlet 52; , And a tap water supply means 55 (see FIG. 7) for feeding tap water to the upstream side of the blowout port 52, and a control device 60.

  The outer tank 2 has a cylindrical shape, includes the rotary drum 3 coaxially, and has an open front surface. An outer tank cover 2 d is provided at the opening on the front surface to enable water storage in the outer tank 2. In addition, the cylindrical surface of the outer tank 2 is provided with an overflow 2h for abnormal overflow. Further, the lower side of the outer tank 2 is supported in a vibration-proof manner by the damper 5 fixed to the base 1 h. Further, a bellows 10 made of rubber is provided at the opening of the outer tank 2 (the outer tank cover 2d), and the outer tank 2 is water-sealed by closing the door 9.

  The rotary drum 3 is a rotatably supported cylindrical washing and dewatering tank, and the outer peripheral wall and the bottom wall have a large number of through holes (not shown) for water flow and ventilation, and on the front end face Is provided with an opening 3a for taking in and out the laundry. A fluid balancer 3c that rotates integrally with the rotary drum 3 is provided on the outer peripheral side of the opening 3a. Further, a lifter 3 b for lifting the laundry is provided on the inner peripheral wall of the rotary drum 3. Further, the central axis of rotation of the rotary drum 3 is inclined so that the horizontal or the opening 3a side becomes higher.

  The blower unit 51 includes a blower 51 a and a heater 51 b, and is fixed to a reinforcing material (not shown) in the housing 1. The blower 51a includes a driving fan motor 24a, a fan impeller 24b (see FIG. 10), and a fan case 24c. The fan case 24c incorporates a heater 51b as a heating means, and heats the air sent from the fan impeller 24b. The heater 51 b is configured by a PTC (Positive Temperature Coefficient) heater or the like. The heating means is not limited to the heater, and for example, a heat pump may be used.

  The discharge port 51 c of the blower unit 51 is connected to the hot air duct 26. The hot air duct 26 is connected to a bellows pipe 27 made of rubber, and the bellows pipe 27 is connected to an air outlet 52 provided in the outer tank cover 2 d via a bellows pipe joint 28. The air outlet 52 is disposed above the outer tank 2 to shorten the distance from the air blowing unit 51, and to suppress the temperature of the warm air emitted from the air outlet 52 from being lower than the temperature generated by the air blowing unit 51. ing.

  The first washing liquid supply means 53 includes a first circulation pump 53a, a bellows hose 53b1 for supplying the washing liquid pumped up by the first circulation pump 53a into the rotary drum 3 in a shower shape, and a supply flow path 53b2 ) And is configured.

  The second washing liquid supply means 54 includes a second circulation pump 54a, and a supply pipe 54b for supplying the washing liquid pumped up by the second circulation pump 54a to the upstream side of the outlet 52. . The second circulation pump 54a pumps up the washing liquid at a flow rate lower than that of the first circulation pump 53a. The supply pipe 54b is formed of a flow passage having a diameter smaller than that of the supply pipe 53b.

  A drying duct 29 is disposed inside the back of the housing 1. The drying duct 29 is connected to an air inlet 2 b provided at the rear of the outer tank 2 via a rubber bellows hose 29 a. In the drying duct 29, a known water-cooling dehumidifying mechanism (not shown) is incorporated. A heat pump may be used instead of the heater and the water cooling dehumidifying mechanism.

  One end of the drainage hose 19 is connected to the water outlet port of the first circulation pump 53a, and the other end extends out of the machine. Further, the drainage hose 19 is provided with a drainage valve 25 in the middle of extension in the machine.

  FIG. 3 is a rear view schematically showing the internal structure of the case of the washing machine of the present invention.

  As shown in FIG. 3, a water supply port 2 a for supplying water and detergents into the outer tank 2 is provided at the rear of the side of the outer tank 2. The water supply port 2a is connected to the detergent tray 7 (see FIG. 1) by a rubber bellows hose 17.

  The drum motor 4 is attached to the outer center of the rear end surface of the outer tank 2. The rotary shaft of the drum motor 4 penetrates the outer tank 2 and is coupled to the rotary drum 3.

  Water supply related parts such as a water supply solenoid valve 11, a bath water absorption pump 12, a water level sensor 34 (see FIG. 7) and the like are provided at the upper rear of the outer tank 2. The upper surface cover 1e is provided with a water supply hose connection port 11a from a water tap and a water absorption hose connection port 12a for the remaining hot water of the bath. The water level sensor 34 (see FIG. 7) detects the water level in the outer tank 2 and is provided at the lowermost portion of the rear end surface of the outer tank 2 and is a known air trap (not shown) or tube (not shown) Is made up of

  The feed water solenoid valve 11 includes a detergent feed solenoid valve 11b, a softener feed solenoid valve 11c, a cooling water feed solenoid valve 11d, a mist feed solenoid valve 11e, and the like.

  The detergent water supply solenoid valve 11b supplies tap water from the water supply hose connection port 11a to the outer tub 2 by passing it through the detergent input chamber (not shown) of the detergent tray 7 (see FIG. 1). The tap water supplied to the detergent feeding room is injected into the outer tank 2 through the bellows hose 17 together with the detergent being fed.

  The softener water supply solenoid valve 11c supplies the tap water from the water supply hose connection port 11a to a softener insertion chamber (not shown) of the detergent tray 7 (see FIG. 1) through a water supply path (not shown). The tap water injected into the softener charging chamber is injected into the outer tank 2 through the bellows hose 17 together with the injected softener.

  The cooling water supply solenoid valve 11d supplies the tap water from the water supply hose connection port 11a to the water cooling dehumidifying mechanism (not shown) of the drying duct 29 through a water supply path (not shown).

  The mist feed solenoid valve 11e supplies the tap water from the feed hose connection port 11a to the upstream side of the outlet 52 (see FIG. 2) through the feed pipe 55a (see FIG. 7).

  FIG. 4 is a perspective view showing a first circulation pump and peripheral flow paths of the washing machine, FIG. 5 is a plan view of the first circulation pump and the second circulation pump as viewed from above, and FIG. It is a perspective view when the circulation flow path is seen from the back side of an outer tank cover. In FIGS. 4 and 6, the second circulation pump 54a and the supply pipe 54b are not shown.

  As shown in FIG. 4, the first circulation pump 53 a is configured to include a casing 42 integrally formed with the filter case 23 and a circulation pump motor 47. In the casing 42, discharge ports 44, 45, a water inlet port 23a (see FIG. 5) and a water outlet port 23b (see FIG. 5) are formed.

  The discharge port 45 is connected to the joint 18 a via a bellows hose 40. The joint 18 a is provided at the inlet 18 formed to face the recess 2 f at the bottom of the outer tank 2.

  As shown in FIG. 5, the first circulation pump 53 a includes a substantially circular suction port 43 connecting the filter case 23 and the casing 42. The suction port 43 is formed coaxially with the impeller 46 of the first circulation pump 53a.

  The second circulation pump 54 a is connected to the side opposite to the suction port 43 of the filter case 23 via a substantially circular suction port 54 c. Further, a supply pipe 54b is connected to the second circulation pump 54a, and an end of the supply pipe 54b is connected to the warm air duct 26 (see FIG. 7).

  As shown in FIG. 6, the discharge port 44 is connected to a circulation flow path 53b2 (53b) provided on the inner peripheral wall of the outer tank cover 2d via a bellows hose 53b1 (53b). The bellows hose 53 b 1 and the circulation passage 53 b 2 constitute a circulation passage extending from the bottom of the outer tank 2 to the upper part of the outer tank 2. The circulation flow path 53b2 is connected to a nozzle 53c provided at the edge of the opening 2d1 of the outer tank cover 2d. The nozzles 53 c are formed in a slit shape along the circumferential direction, and supply the washing liquid into the rotary drum 3 in a thin film shape.

  When the circulation pump motor 47 of the first circulation pump 53a rotates forward with the drainage valve 25 (see FIG. 2) closed, the washing liquid in the outer tank 2 passes from the drainage port 21 through the bellows hose 22 (see FIG. 4) The foreign matter is removed by a filter (not shown) in the filter case 23 (see FIG. 4). Thereafter, the washing liquid enters the first circulation pump 53a, is discharged from the discharge port 44, is fed into the circulation flow path 53b2, and is then sprayed from the nozzle 53c into the rotary drum 3 (see FIG. 1). Moreover, the temperature sensor 21a is connected to the drainage port 21, and the temperature of the washing liquid can be detected.

  In addition, when the circulation pump motor 47 of the first circulation pump 53a is reversely rotated, the washing liquid in the outer tank 2 passes from the drainage port 21 (see FIG. 2) through the bellows hose 22 and the filter (not shown) in the filter case 23 Foreign matter is removed. Thereafter, the washing liquid enters the first circulation pump 53a, is discharged from the discharge port 45, and returns to the inside of the outer tank 2 through the bellows hose 40 and the joint 18a. In the present embodiment, the first circulation pump 53a and the bellows hoses 22 and 40 constitute a washing liquid generating means.

  FIG. 7 is a top view showing the internal structure of the housing of the washing machine of the present invention. In FIG. 7, the internal structure is illustrated on the right side half, and the left side half is illustrated as viewed from above.

  As shown in FIG. 7, the tap water supply means 55 supplies tap water upstream of the outlet 52 (see FIG. 2), and includes a water supply pipe 55a. One end on the upstream side of the water supply pipe 55 a is connected to the mist water supply electromagnetic valve 11 e (see FIG. 3) of the water supply electromagnetic valve 11, and the other end is connected to the warm air duct 26 on the downstream side of the blower unit 51.

  Further, the supply pipe 54 b of the second washing liquid supply means 54 extends upward from the lower part of the outer tub cover 2 d from the lower part, and is connected to the warm air duct 26 on the downstream side of the blower unit 51.

  FIG. 8 is a front view showing a connected state of the outer tank cover and the blower unit. In addition, FIG. 8 has shown the state in which the outer tank cover 2d and the ventilation unit 51 were connected.

  As shown in FIG. 8, a bellows pipe joint 28 is integrally formed on the outer tank cover 2 d. The bellows pipe joint 28 is formed with a connection port 28a to which the bellows pipe 27 is connected on the front surface side of the outer tank cover 2d. The connection port 28 a faces the radially outer side (upper right diagonal side) of the outer tank cover 2 d.

  The air outlet 52 is formed at the edge of the opening 2d1 of the outer tank cover 2d, and is directed to the radial center of the outer tank cover 2d.

  The bellows tube 27 extends in the vertical direction, the lower end is connected to the connection port 28 a, and the upper end is connected to the warm air duct 26.

  The hot air duct 26 turns from the upper end of the bellows tube 27 to the rear and extends, and is connected to the blower unit 51.

  FIG. 9 shows a hot air duct, (a) is a perspective view, (b) is a side view, (c) is a bottom view, and (d) is a cross-sectional view taken along line B-B of (c). FIG. 8 illustrates the single unit of the hot air duct 26 from which the upstream blowing unit 51 and the downstream bellows tube 27 have been removed.

  As shown in FIGS. 9A and 9B, the hot air duct 26 has a duct portion 26a having an air passage inside, and a connection opening 26b to which the outlet of the blower unit 51 (see FIG. 1) is connected; And a connection opening 26c to which the bellows tube 27 is connected. The connection opening 26 b has a substantially elliptical (flat) opening, and the connection opening 26 c has a circular opening.

  Further, in the hot air duct 26, a connection portion 26d to which the supply pipe 54b of the second washing liquid supply means 54 is connected and a connection portion 26e to which the water supply pipe 55a of the tap water supply means 55 is connected protrude in the vicinity of each other. It is formed. The connection portion 26 d and the connection portion 26 e have a tubular shape protruding laterally, and are arranged in parallel to each other. As such, by causing the connection portions 26d and 26e to protrude sideward (leftward), it is possible to prevent the upper air path from being blocked.

  As shown in FIG. 9C, nozzles 26d1 and 26e1 protruding into the flow path Q in the duct portion 26a are formed at the ends of the connection portions 26d and 26e. Further, a supply port 26d2 for discharging the washing liquid is formed on the peripheral surface (side surface) of the tip of the nozzle 26d1. A supply port 26e2 for discharging tap water is formed on the peripheral surface (side surface) of the tip of the nozzle 26e1. The opening area of the supply port 26d2 is formed larger than the opening area of the supply port 26e2, in other words, the supply amount of the washing liquid is larger than the supply amount of tap water.

  As shown in FIG. 9D, the nozzle 26e1 is located upstream of the nozzle 26d1 in the flow of the wind. That is, the tap water supply port 26e2 is located upstream of the washing liquid supply port 26d2. The supply ports 26d2 and 26e2 face the downstream side of the flow of wind. That is, the supply ports 26d1 and 26e1 are directed substantially opposite to the side to which the air (air) from the blower unit 51 is supplied. Thereby, the pressure of the wind can prevent the supply of the washing liquid from the supply port 26d2 from being blocked, and similarly, the pressure of the wind can prevent the blockage of the tap water from the supply port 26e2 .

  FIG. 10 is a cross-sectional view taken along the line AA of FIG.

  As shown in FIG. 10, when the blower unit 51 is driven, the fan impeller 24b is rotated by the motor 24a, and high-speed wind is generated. High-speed wind blows from the air outlet 52 through the hot air duct 26, the bellows tube 27 and the bellows tube joint 28. When the second circulation pump 54a (see FIG. 2) is driven simultaneously with the blower unit 51, the washing liquid generated at the bottom of the outer tank 2 is pumped up through the supply pipe 54b (see FIGS. 2 and 5). It is supplied to the flow path Q in the warm air duct 26. The washing liquid supplied from the supply port 26d2 comes into contact with the high-speed wind supplied from the air blowing unit 51 to form a mist of the washing liquid. The mist-formed washing liquid is blown out from the outlet 52 into the rotary drum 3 through the hot air duct 26, the bellows tube 27 and the bellows tube joint 28.

And it spread | diffuses in the rotating drum 3 with a high-speed wind, and can disperse | distribute a washing liquid substantially uniformly. It is preferable to set the amount of the washing liquid according to the air volume and the wind speed in order to efficiently make mist and spread uniformly in the rotating drum 3. For example, in the case where the air volume is 1.5 m < ³ > / min and the air velocity is 100 m / s, about 0.05 to 0.2 L / min is preferable.

  When the supply from the washing liquid supply port 26d2 is completed, the second circulation pump 54a is presented. Then, the mist water supply solenoid valve 11e is opened, and tap water flows through the water supply pipe 55a (see FIG. 7) and is supplied from the supply port 26e2. When the tap water supplied from the supply port 26e2 contacts the high-speed wind supplied from the blower unit 51, the tap water is misted. The misted tap water passes through the warm air duct 26, the bellows tube 27, and the bellows tube joint 28, and cleans the washing liquid adhering to the wall surface of the flow path Q up to the outlet 52. At this time, since the tap water supply port 26e2 is located on the upstream side of the washing liquid supply port 26d2, it becomes possible to wash the entire flow path to which the washing liquid adheres.

  Further, the supply pipes 54b and 55a are connected by connecting the supply pipe 54b of the second washing liquid supply means 54 and the supply pipe 55a of the tap water supply means 55 to the hot air duct fixed on the side of the housing 1. As compared with providing the movable portion, the assemblability can be improved, and the wear at the time of operation can be reduced, which is advantageous in terms of quality.

  Next, the control device 60 (see FIG. 11) will be described. The control device 60 includes a microcomputer, a drive circuit, and the like, and also includes an on / off signal of the operation buttons 13 and 15 shown in FIG. 11 and an input circuit of an output signal from various sensors. Further, the microcomputer receives various information signals in the user's operation, the washing process and the drying process. The microcomputer is connected to the motor 4, the feed water solenoid valve 11, the drain valve 25, the blower unit 51 and the like via a drive circuit, and controls the opening / closing, rotation and energization of these. In addition, in order to inform the user of information on the washing machine S, the display 14 and the buzzer 67 are also controlled.

<< driving process of this embodiment >>
Next, the operation process of the washing machine S according to the present embodiment will be described using FIG. FIG. 12: is process drawing explaining the driving | operation process of tank washing operation (washing-rinse-dewatering) in washing machine S which concerns on this embodiment.

  In step S1, the control device 60 receives an input of course selection of the operation process of the washing machine S (course selection). Here, the user opens the door 9, confirms that no clothes remain inside the drum 3, and closes the door 9. Then, the user operates the operation switches 13 and 15 to select and input the course of the driving process. By operating the operation switches 13 and 15, the course of the selected driving process is input to the control device 60. The control device 60 reads the corresponding driving pattern from the driving pattern database based on the input driving process course, and proceeds to step S2. In addition, in the following description, it demonstrates as what the tank washing | cleaning course (washing-rinse 2 times-dehydration-drying) was selected.

  In step S2, the control device 60 executes a water supply process. Specifically, the control device 60 controls the water supply solenoid valve 11 (for example, opens the detergent water supply solenoid valve) to directly supply water to the water supply port 2 a of the outer tank 2. In addition, the sensor detects the temperature of the water supplied. When the water level sensor detects a predetermined water level, the control device 60 controls the water supply solenoid valve 11 (for example, closes the detergent water supply solenoid valve) and ends the water supply to the outer tank 2. As described above, by supplying water before the later-described detergent charging process, the undiluted solution of the tank cleaner is prevented from directly touching the metal parts, thereby preventing corrosion.

  The controller 60 determines the operating time by map search based on the detected water temperature. Then, the control device 60 displays the determined driving time on the display 14. In addition, although it demonstrated as what supplies water to the outer tank 2 and detects a water temperature, it is not restricted to this. For example, the water temperature at the time of the previous operation may be stored in a storage unit (not shown) of a microcomputer and used.

  In step S3, the control device 60 executes a detergent input waiting step (detergent input waiting step). For example, the control device 60 waits for a predetermined time, and proceeds to step S4. The user opens the door 9 while waiting and puts in bath cleaners. When the door 9 is opened and then closed by means (not shown) for detecting the opening and closing of the door 9, the control device 60 proceeds to step S4, assuming that the bath cleaner is charged. It may be

  In step S4, the control device 60 executes a detergent dissolving process. For example, the control device 60 controls the water supply solenoid valve 11 (for example, opens the detergent water supply solenoid valve) to supply water to the outer tank 2. When the water level sensor detects a predetermined water level (for example, the water level lower than the lower end of the intake port 2b), the control means 60 controls the water supply solenoid valve 11 (for example, closes the detergent supply water solenoid valve) to supply water. Stop. By setting the water level of the washing liquid to a level lower than that of the air inlet 2b, it is possible to secure a circulation path for supplying the air in the outer tank 2 to the blower unit 51 in the heating and stirring process described later. Then, the control device 60 executes the detergent dissolving operation (detergent dissolving operation). Specifically, the control device 60 controls the first circulation pump 53 a to flow the water and the bath cleaner sucked through the drainage port 21 via the bellows hose 22, through the bellows hose 40 and flowing the recess 2 f. It discharges from the inlet 18. The water and the bath cleaner discharged from the inflow port 18 flow through the recess 2f, are directed to the drainage port 21, and are circulated. Thereby, the water and the bath cleaner are stirred, and the tank cleaner is dissolved in water to produce a washing liquid. When a predetermined time (for example, 10 seconds) has elapsed, the control device 60 stops the first circulation pump 53a, and proceeds to step S5.

  In step S5, the control device 60 executes a high speed stirring process. Here, the high-speed stirring step is a step of winding up the washing liquid produced in step 4 by the rotation of the drum 3 to wash the outer tub 2 and the drum 3. Specifically, the control device 60 controls the motor 4 to rotate the drum 3 at a predetermined rotation speed (for example, 100 rpm) (see FIG. 12) and controls the first circulation pump 53a to perform the first detergent solution. The supply means is set to a predetermined circulation flow rate (for example, a circulation flow rate at which the washing liquid passes through the nozzle 53c), and the washing liquid sucked from the drainage port 21 is dispersed in the drum 3. As a result, the washing liquid is uniformly applied to the inner wall surface of the outer tank 2 so that the stain can be decomposed, and at the same time the stain is removed by the water flow of the washing liquid. At this time, the rotation speed of the drum 3 is the rotation speed at which the washing liquid is wound up to the upper side of the inner surface of the outer tank 2 and at least the rotation speed of the drum 3 is the rotation speed at which the washing liquid is wound to a position higher than the rotation center of the drum 3 It is desirable to have. In addition, the first circulation pump 53a is controlled to spray the washing liquid into the drum 3, whereby the washing liquid is applied in the bellows hose 53b1 and the supply flow path 53b2 (partially not shown) to supply the first washing liquid. Clean the inner surface of the flow path of the means. Moreover, when the bottom of the outer tank 2 or the cylindrical surface (for example, the cylindrical surface on the right side of the outer tank 2) is provided with the overflow 2h for abnormal overflow, the rotation direction of the drum 3 is the overflow 2h side (for example, reverse direction) If the rotation speed of the drum 3 is limited to the rotation speed (e.g. 35 rpm) at which the drum 3 is not flooded from the overflow port 2h, the washing liquid can be prevented from flowing out from the overflow port 2h. In the present embodiment, the number of rotations is limited only when the drum 3 rotates in the reverse direction, but may be rotated in the normal direction. Further, the rotational speed of the drum 3 may not be limited by the rotational direction, and the rotational direction of the drum 3 may be set only in the reverse direction of the overflow 2h. When a predetermined time (for example, 20 seconds) has elapsed, the control device 60 ends the high-speed stirring process, and proceeds to step S6.

  In step S6, the control device 60 executes the heating and stirring process. Here, the heating and stirring step is a step of warming the washing liquid generated in step 4 with the warm air generated by the blower unit 51. Specifically, the control device 60 generates a warm air by controlling the driving fan motor 24 a and the heater 51 b, and blows the warm air into the drum 3 from the blowout port 52 via the warm air duct 26. By controlling the second circulation pump 54a and spraying the washing liquid through the warm air duct 26 and the air outlet 52 into the drum 3, the washing liquid joined with the warm air in the warm air duct 26 is heated and the cleaning power is improves. Further, since there is a large difference in speed between the warm air blown out from the outlet 52 and the washing liquid and the air in the drum 3, the washing liquid is strongly stirred and misted due to this speed difference. The mist-formed washing liquid is sprayed into the drum 3 together with the warm air blown out from the blowout port 52. As a result, the washing liquid can be applied also to a portion where the application of the washing liquid is insufficient (for example, near the rotation center of the drum 3) only by the rotation of the drum 3. Further, the warm air hits the water surface of the washing liquid accumulated in the outer tub 2 and raises the temperature of the washing liquid also in the outer tub 2. Since the washing liquid is circulated by the second circulation pump 54a, a temperature difference does not occur between the water surface and the water, and nonuniformity of the washing power of the washing liquid can be eliminated. When the second detergent liquid supply means is not provided, the control device 60 controls the first circulation pump 53a to rotate the impeller 46 of the first circulation pump 53a, so that the washing liquid is called into the filter case 23 The difference in temperature between the water surface and the water is reduced, and uneven washing power can be eliminated. At this time, if the circulation flow rate of the first detergent supply means is large (for example, the same circulation amount as the high-speed stirring process), the water surface of the washing liquid drops significantly, and the air blowing unit 51 circulates the air in the outer tub 2, The air pressure in the outer tank 2 is reduced to a negative pressure. When the pressure in the outer tank 2 is negative, the washing liquid and the air in the outer tank 2 are mixed to generate air bubbles. When the air bubbles reach the surface of the water, they burst and make noise, further foaming the washing liquid and reducing the detergency. Therefore, it is better that the circulation flow rate of the first detergent solution supply means be smaller than the circulation flow rate of the first detergent solution supply means at least in the high-speed stirring step. Further, when the first detergent solution supply means and the second detergent solution supply means are not provided, the control device 60 controls the motor 4 to rotate the drum 3 at a predetermined rotation number (for example, 35 rpm) (see FIG. 12). Thus, it is possible to stir the washing liquid, to reduce the temperature difference between the water surface and the water, and to solve the uneven washing power of the washing liquid. When the bottom of the outer tank 2 or the cylindrical surface (for example, the bottom of the right side of the outer tank 2) is provided with the air inlet 2b for supplying air to the blower unit 51, the washing liquid is rotated by rotating the drum 3 forward. Parts made of metal in the circulation path of the warm air generated by the blower unit 51 (for example, a fan motor for driving, a heater, etc.) drawn into the air inlet 2 b for supplying air to the blower unit 51 and scattered. It is desirable that the washing liquid adheres to 51 b) and the occurrence of corrosion and insulation deterioration can be prevented. In addition, when the temperature of the washing liquid (for example, the temperature detected by the temperature sensor 21a) reaches a predetermined temperature (for example, 35 ° C.), the control device 60 stops the energization of the heater 51b, whereby the temperature of the washing liquid is excessive. Prevent rising. When a predetermined time (for example, 3 minutes) has elapsed, the control device 60 ends the heating and stirring process.

  When step S6 is completed, the controller 60 determines whether the temperature of the washing liquid has reached a predetermined temperature in step S6. If the temperature of the washing liquid has not reached the predetermined temperature, the control device 60 executes step S5 to repeat step S5 and step S6 alternately until the temperature of the washing liquid reaches the predetermined temperature. Do. In other words, the outer tub 2 and the drum 3 are cleaned by stirring the drum 3 at high speed while heating the washing liquid. When the temperature of the washing liquid reaches a predetermined temperature, the control device 60 executes step S5 to repeat step S5 and step S6 alternately until a predetermined time (for example, 30 minutes) elapses. . In other words, the outer tub 2 and the drum 3 are cleaned by stirring the drum 3 at high speed while keeping the washing liquid warm. When a predetermined time (for example, 30 minutes) elapses, control device 60 ends the high-speed stirring process or the heating and stirring process, and proceeds to step S7. In this embodiment, steps S5 and S6 are repeatedly executed until a predetermined time elapses even after the washing liquid reaches a predetermined temperature, but the process may proceed to step 7 as soon as the washing liquid reaches a predetermined temperature. good. In addition, step S5 and step S6 are alternately repeated until the operating time determined in step S2 elapses, and when the operating time determined in step S2 elapses, the high speed stirring process or the heating and stirring process ends, and step S7 You may proceed to Accordingly, it is possible to cope with the case where the temperature of the washing liquid does not reach a predetermined temperature because the heater 51b is not heated due to a failure or the like.

  In step S7, the control device 60 executes the water supply 2 process. The control device 60 controls the water supply solenoid valve 11 (for example, opens the detergent water supply solenoid valve) (FIG. 12) to supply the rinse water into the outer tank 2. When the detection value of the water level sensor rises to a predetermined water level, the water supply is stopped (for example, the detergent water supply solenoid valve is closed), the control device 60 ends the water supply 2 process, and the process proceeds to step S8.

  In step S8, the control device 60 executes the washing process. Here, the washing step is a step of rolling up the washing liquid produced in step 7 by the rotation of the drum 3 to wash the outer tub 2 and the drum 3.

  Specifically, the control device 60 controls the first circulation pump 53 a to discharge the washing water sucked from the drainage port 21 into the inside of the drum 3 from the nozzle 53 c provided at the opening of the outer tank 2. The washing liquid is uniformly applied to the inner wall surface of the outer tank 2 by controlling the motor 4 and rotating the drum 3 at a predetermined rotation speed (for example, 100 rpm) (see FIG. 12). Remove stains. At this time, the rotation speed of the drum 3 is the rotation speed at which the washing liquid is wound up to the upper side of the inner surface of the outer tank 2 and at least the rotation speed of the drum 3 is the rotation speed at which the washing liquid is wound to a position higher than the rotation center of the drum 3 It is desirable to have. In step S5, in the high speed stirring step, when the outer tub 2 is provided with the overflow 2h, when rotating to the overflow 2h side, the rotation speed of the drum 3 is set to a rotation speed (for example 35 rpm) not overflowing from the overflow 2h. Although the washing liquid is prevented from flowing out from the overflow port 2h by the restriction, the number of rotations of the drum 3 may not be limited in step S8. Thereby, the washing liquid can be made to flow out from the overflow 2h, and the inner wall surface of the overflow 2h can be cleaned. When a predetermined time (for example, 6 minutes) has elapsed, the control device 60 ends the washing process, and proceeds to step S9.

  In step S9, the control device 60 executes a drainage process. The controller 60 stops the motor 4 and the first circulation pump 53a, opens the drain valve 25 and drains the washing liquid in the outer tub 2. The water level sensor continues to monitor the water level of the washing liquid in the outer tub 2 during drainage. When the detection value of the water level sensor falls below the predetermined water level, the control device 60 ends the drainage process, and proceeds to step S10.

  In step S10, the control device 60 executes a dewatering process. The control device 60 rotates the drum 3 in the reverse direction at high speed (for example, 1250 rpm) (FIG. 12) to dewater the washing liquid contained in the clothes while maintaining the opening of the drainage valve 25 (FIG. 12). When the predetermined time has elapsed, the control device 60 ends the dehydration step 1 and proceeds to step 11.

  In step S11, the control device 60 executes a water supply process. The controller 60 closes the drainage valve 25 and controls the water supply solenoid valve 11 (for example, opens the detergent water supply solenoid valve) (FIG. 12) to supply rinse water into the outer tank 2. When the detection value of the water level sensor rises to a predetermined water level, the water supply is stopped (for example, the detergent water supply solenoid valve is closed), the control device 60 ends the water supply process, and the process proceeds to step S12.

  In step S12, the control device 60 executes a rinse and stirring process. The controller 60 controls the water supply solenoid valve 11 (for example, opens the detergent water supply solenoid valve) (FIG. 12) to supply rinse water to the outer tank 2 and controls the motor 4 to control the drum 3. The first circulation pump 53a is controlled to rotate, and the rinse water sucked from the drainage port 21 is discharged from the nozzle 53c provided at the opening of the outer tank 2 into the inside of the drum 3 to rinse the drum 3. Further, the control device 60 controls the second circulation pump 54 a to discharge the inside of the drum 3 via the warm air duct 26 and controls the water supply solenoid valve 11 (for example, opens the mist feed water solenoid valve). Valve) (FIG. 12), rinse water is supplied to the inside of the drum 3 via the hot air duct 26 and the drum 3 is rinsed. When the detection value of the water level sensor rises to a predetermined water level, the water supply is stopped (for example, the detergent water supply solenoid valve and the mist supply water solenoid valve are closed), the drainage valve 25 is opened and the washing in the outer tank 2 is performed. Drain the solution. The water level sensor continues to monitor the water level of the washing liquid in the outer tub 2 during drainage. When the detection value of the water level sensor falls below the predetermined water level, the controller 60 closes the drainage valve 25 and controls the water supply solenoid valve 11 (for example, the detergent water supply solenoid valve and the mist supply water solenoid valve are opened. (FIG. 12), the rinse water is supplied to the outer tank 2. These drainage and water supply are repeated, and when a predetermined time (for example, 2 minutes) (see FIG. 12) elapses, the controller 60 stops the water supply (for example, closes the detergent water supply solenoid valve and the mist supply water solenoid valve). ), Finish the rinse and agitation process, and proceed to step S13.

  In step S13, the control device 60 executes a drainage process. The controller 60 stops the motor 4 and the first circulation pump 53a, opens the drain valve 25 and drains the washing liquid in the outer tub 2. The water level sensor continues to monitor the water level of the washing liquid in the outer tub 2 during drainage. When the detection value of the water level sensor falls below the predetermined water level, the control device 60 ends the drainage process, and proceeds to step S14.

  In step S14, the control device 60 executes a dewatering process. The control device 60 rotates the drum 3 in the reverse direction at high speed (for example, 1250 rpm) (FIG. 12) to dewater the washing liquid contained in the clothes while maintaining the opening of the drainage valve 25 (FIG. 12). When the predetermined time has elapsed, the control device 60 ends the dehydration step 1 and proceeds to step 15.

  In step S15, the control device 60 executes a water supply process. The controller 60 closes the drainage valve 25 and controls the water supply solenoid valve 11 (for example, opens the detergent water supply solenoid valve) (FIG. 12) to supply rinse water into the outer tank 2. When the detection value of the water level sensor rises to a predetermined water level, the water supply is stopped (for example, the detergent water supply solenoid valve is closed), the control device 60 ends the water supply process, and the process proceeds to step S16.

  In step S16, the control device 60 executes a rinse and stirring process. The controller 60 controls the water supply solenoid valve 11 (for example, opens the detergent water supply solenoid valve) (FIG. 12) to supply rinse water to the outer tank 2 and controls the motor 4 to control the drum 3. The first circulation pump 53a is controlled to rotate, and the rinse water sucked from the drainage port 21 is discharged from the nozzle 53c provided at the opening of the outer tank 2 into the inside of the drum 3 to rinse the drum 3. Further, the control device 60 controls the second circulation pump 54 a to discharge the inside of the drum 3 via the warm air duct 26 and controls the water supply solenoid valve 11 (for example, opens the mist feed water solenoid valve). Valve) (FIG. 12), rinse water is supplied to the inside of the drum 3 via the hot air duct 26 and the drum 3 is rinsed. When the detection value of the water level sensor rises to a predetermined water level, the water supply is stopped (for example, the detergent water supply solenoid valve and the mist supply water solenoid valve are closed), the drainage valve 25 is opened and the washing in the outer tank 2 is performed. Drain the solution. The water level sensor continues to monitor the water level of the washing liquid in the outer tub 2 during drainage. When the detection value of the water level sensor falls below the predetermined water level, the controller 60 closes the drainage valve 25 and controls the water supply solenoid valve 11 (for example, the detergent water supply solenoid valve and the mist supply water solenoid valve are opened. (FIG. 12), the rinse water is supplied to the outer tank 2. These drainage and water supply are repeated, and when a predetermined time (for example, 2 minutes) (see FIG. 12) elapses, the controller 60 stops the water supply (for example, closes the detergent water supply solenoid valve and the mist supply water solenoid valve). ), Finish the rinse and agitation process, and proceed to step S17.

  In step S17, the controller 60 executes a softener water supply process. The control device 60 controls the water supply solenoid valve 11 (for example, opens the softener water supply solenoid valve) to pass through the softener insertion chamber (not shown) of the detergent tray 7 (see FIG. 1), and the outer tank 2. Supply rinse water into 2 to wash the softener room (not shown). When a predetermined time (for example, one minute) (see FIG. 12) elapses, control device 60 stops the water supply (for example, closes the softener water supply solenoid valve), ends the softener water supply process, and proceeds to step S18. move on.

  In step S18, the control device 60 executes the rinse and agitation 2 step. The control device 60 controls the motor 4 to rotate the drum 3 and rinse the drum 3. In addition, by controlling the first circulation pump 53 a and discharging the rinse water sucked from the drain 21 from the nozzle 53 c provided at the opening of the outer tank 2 into the inside of the drum 3, Rinse the piping. Further, the control device 60 controls the second circulation pump 54 a and discharges the washing liquid to the inside of the drum 3 via the hot air duct 26 to rinse the piping of the second detergent liquid supply means. When a predetermined time (for example, one minute) (see FIG. 12) has elapsed, the control device 60 proceeds to step S19.

  In step S19, the control device 60 executes a drainage process. The control device 60 stops the motor 4, the first circulation pump 53 a and the second circulation pump 54 a, opens the drainage valve 25, and drains the rinse water in the outer tub 2. The water level sensor continues to monitor the water level of the washing liquid in the outer tub 2 during drainage. When the detection value of the water level sensor falls below the predetermined water level, the control device 60 ends the drainage process, and proceeds to step S20.

  In step S20, the control device 60 executes a dewatering process. Specifically, the controller 60 opens the drain valve 25 and controls the motor 4 to rotate the drum 3 at a high speed, thereby centrifugally dewatering the water attached to the outer tank 2 and the drum 3. Then, when a predetermined time (for example, 4 minutes) (see FIG. 12) elapses, the control device 60 stops the motor 4 and closes the drainage valve 25 to perform the tank cleaning operation (washing to rinsing to dewatering). finish.

  As described above, according to the present embodiment, the means for raising the temperature of the washing liquid is the air blowing unit 51 including the heating means heater 51 b and the circulation path of the warm air generated by the air blowing unit 51. The means for raising the temperature of the washing liquid is connected to the outer tank 2 with the outlet 52 and the suction port 2b, and since both are connected to a position higher than the water surface of the washing liquid, water does not leak.

  Further, since it is warm air that heats the washing liquid directly and the heater 51b does not touch the washing liquid, the deposition of the scale does not deteriorate the heating efficiency. Furthermore, in the heating and stirring process, since the drum 3 is rotated in the direction away from the air inlet 2b, the washing liquid is sucked from the air inlet 2b and prevented from reaching the heater 51b as droplets.

  Further, by providing the high-speed stirring step and the heating and stirring step, it is possible to carry out the washing by the water flow and the washing by the extra effect, respectively. The outer tank 2 can be efficiently cleaned by repeating the heating and stirring process of decomposing the dirt stuck to the outer tank 2 and the high-speed stirring process of separating and peeling the dirt from the outer tank 2.

  As mentioned above, according to the driving | running process of drum type washing-drying machine S which concerns on this embodiment, the safety | security with respect to a water leak is ensured, and the washing machine which implements tank washing efficiently can be provided.

  Although the above embodiments have been described using a drum-type washing machine, the present invention can be applied to a so-called vertical-type washing machine.

2 outer tank 3 drum 4 motor 11 water supply unit (water supply means)
34 Water level sensor (water level detection means)
51 Blower unit 51b heater (heating means)
52 outlet (outlet)
60 Control device (operation control means)
S drum type washer dryer

Claims (7)

An outer tank that holds water inside;
An inner tub rotatably supported in the outer tub and containing a garment;
A motor that rotationally drives the inner tank;
Water supplying means for supplying water into the outer tank;
A water level detection means for detecting the water level in the outer tank;
A blower unit having a fan impeller and a fan motor for driving;
A blowout port for blowing out the wind generated by the blowing unit into the inner tank;
A heater configured to make the wind generated by the blower unit warm;
Operation control means capable of executing a tank cleaning operation by controlling the motor, the blower unit and the heating means;
Temperature detection means for detecting the temperature of the washing liquid in the outer tank ;
The tank cleaning operation is
A high speed stirring step of winding up the washing liquid in the outer tub by rotation of the inner tub to wash the outer tub and the inner tub;
And heating the washing liquid in the outer tank.
The warm air generated by the heating means heats the washing liquid in the outer tank,
A washing machine characterized in that the high speed stirring step and the heating step are alternately repeated at least until the temperature detection means reaches a predetermined temperature. The outer tank is further connected to the air blowing unit, and further includes a suction port for taking the air in the outer tank into the air blowing unit.
Washing machine according to claim 1 wherein in the heating step, the inner tub, characterized in that the rotating in inlet direction opposite. In the heating step,
The washing machine according to claim 2 , wherein a water level of the washing liquid in the outer tub is lower than a lower end of the suction port. It further comprises a washing liquid supply means for circulating and supplying the washing liquid in the outer tank to the inner tank,
The washing machine according to any one of claims 1 to 3 , wherein a flow rate of the washing liquid supply means in the heating step is smaller than a flow rate of the washing liquid supply means in the high speed stirring step. The first washing liquid supply means for circulating and supplying the washing liquid in the outer tub to the inner tub, and the washing liquid in the outer tub for circulating and supplying the inner tub to the inner tub, the flow rate is smaller than that of the first washing liquid supplier It further comprises a second washing liquid supply means,
The high-speed stirring step is circulated and supplied the washing liquid by the first washing water supply means, the heating step is either claim 1 to 3, characterized in that is circulated and supplied the washing liquid by the second washing liquid supply means The washing machine described in 1 or 2. The washing machine according to any one of claims 1 to 3 , wherein in the high speed stirring step, the inner tub is stirred at a rotation speed for winding up the washing liquid to a position higher than a rotation center of the inner tub. . The outer tank is further equipped with an overflow for abnormal overflow,
In the high speed stirring step, when the inner tank is rotated in the direction of the overflow, the number of rotation of the inner tank is a number of rotation at which the washing liquid in the outer tank does not overflow from the overflow port. The washing machine according to claim 6 .

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