JP2011193967A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a liquid detergent from remaining and to keep the feed performance.SOLUTION: A washing machine includes: a water supply valve 70 mounted on a support member 71; a liquid detergent automatic feeder 64 provided to the support member 71 and constituted of a detergent tank 77, an air pump 40 and a detergent receiving part 32 or the like; an open port 98 provided on the upper part of the detergent receiving part 32 and communicating with the detergent receiving part 32, the water supply valve 70 and the atmosphere; a detergent pouring hose 72 connected between the detergent receiving part 32 and an outer tub cover 65; and a control means 87 for controlling a series of processes. The control means 87 operates the air pump 40, supplies the liquid detergent inside the detergent tank 77 through the detergent receiving part 32 and the detergent pouring hose 72 into an outer tub 43, then operates the water supply valve 70, supplies water through the open port 98, the detergent receiving part 32 and the detergent pouring hose 72 into the outer tub 43, and washes the inside of the detergent receiving part 32 and the inside of the detergent pouring hose 72. Thus, gelling of the liquid detergent is prevented and predetermined performance is demonstrated.

Description

  The present invention relates to a washing machine that detects the type of detergent and controls the introduction of liquid detergent.

  Conventionally, in this type of washing machine, a configuration has been proposed in which a liquid detergent is put into a washing and dewatering tank from a detergent tank in which the liquid detergent is stored in advance (see, for example, Patent Document 1).

  FIG. 6 is a longitudinal sectional view of a first embodiment of a conventional washing machine described in Patent Document 1, and FIG. 7 is a partially cutaway perspective view of a second embodiment of the washing machine. FIG.

  As shown in FIG. 6, the outer cover 19 covers the upper portion of the outer shell 6, and is provided with a control device 10, a water supply valve 11, a water supply path 12, and the like.

  In the outer cover 19, a detergent tank 21 containing a liquid detergent 20 in an amount that can be used for at least a plurality of washings is provided.

  The detergent tank 21 has a replenishing port 21a for replenishing the liquid detergent 20 hermetically closed by a detergent tank lid 22 so that the inside of the detergent tank 21 can be sealed, and has an air inlet 21b and a liquid outlet 21c. Yes.

  The air pump (pump device) 23 is used to feed the liquid detergent 20 in the detergent tank 21 into the washing and dewatering tank 1. The air pump 23 is composed of a piston type, a valve type, etc. The air pump 23 communicates with the air inlet 21a to increase the air pressure in the sealed detergent tank 21.

  Here, the sealing tube 24 forms an air reservoir 24 a that is higher than the liquid level of the liquid detergent 20 in the detergent tank 21, leaving air inside and preventing the liquid detergent from flowing back to the air pump 23. It is configured to do.

  The control device 10 has a cloth amount determining means for determining the amount of laundry (clothing) put into the washing and dewatering tub 1, and in accordance with the determination result determined by the cloth amount determining means, that is, The air pump 23 is operated in accordance with at least one of the amount of laundry or the amount of water according to the amount of laundry, and the liquid detergent 20 is introduced into the washing and dewatering tub 1 from the liquid outlet 21c. ing.

  In the example of FIG. 7, the detergent tank 25 has a replenishment port 25 a for replenishing the liquid detergent 20 so that the detergent tank 25 can be sealed with the detergent tank lid 22, and the air inlet 25 b, the liquid outlet 25 c and the air And a chamber 25d.

  By the operation of the air pump 23, air is communicated to the air inlet 25b of the detergent tank 25 directly connected by the sealed pipe 26, and the air pump 23 increases the air pressure in the sealed detergent tank 25 to thereby increase the liquid outlet 25c. It is configured to allow more liquid detergent to flow out.

  Here, even if the sealing tube 26 is routed along the substantially outer shape of the entire top surface of the detergent tank 25 and the washing machine body is tilted back and forth and left and right, at least part of the liquid surface of the liquid detergent 20 in the detergent tank 25. Is arranged to be higher.

JP 2001-259290 A

  However, in such a conventional configuration, since the liquid detergent stock solution passes through the liquid discharge port, it is inevitable that the liquid detergent remains slightly. This residual detergent reacts with moisture in the air with the passage of time and gels, which accumulates further, and the liquid outlet gradually becomes narrower, which makes it difficult to introduce the liquid detergent.

  In addition, when washing with hot water such as bath water in the washing machine, the steam generated from the hot water penetrates from the liquid outlet to the detergent tank, and the liquid detergent gels and changes in quality in the detergent tank. Therefore, there has been a problem that the performance as a liquid detergent is not sufficiently exhibited.

  An object of the present invention is to solve the above-described conventional problems and to prevent liquid detergent from remaining at or near the liquid discharge port and to maintain the loading performance of the liquid detergent.

  In order to achieve the above object, the present invention provides an outer tub elastically suspended in a housing, an inner tub rotatably supported in the outer tub, and a driving means for rotationally driving the inner tub. A water supply valve provided at the upper part of the housing and having a plurality of discharge ports; a detergent tank provided at the upper part of the housing for storing liquid detergent; a pump for pressurizing the detergent tank; and a liquid detergent sent from the detergent tank. Controls the operation of the liquid detergent automatic charging device composed of the detergent receiving part that receives the liquid, the detergent injection hose that is connected to the detergent receiving part and injects the liquid detergent into the tank, the drive means, the water supply valve, the pump, etc. Control means for sequentially controlling a series of steps of washing, rinsing and dehydration, and the control means operates the pump so that the liquid detergent in the detergent tank is supplied to the detergent receiving part and the detergent water injection. Through the hose After being put in, the water supply valve is operated, water is supplied into the tank through the detergent receiving part and the detergent water supply hose from the discharge port, and the detergent receiving part and the detergent water supply hose are washed. is there.

  Thereby, it can prevent that liquid detergent remains in a detergent receptacle part inside a detergent water injection hose, or gelatinizes, and can hold | maintain the injection | throwing-in performance of liquid detergent.

  The washing machine of the present invention can prevent the liquid detergent from remaining in the detergent water supply hose or the vicinity thereof, and can maintain the charging performance of the liquid detergent.

1 is a longitudinal sectional view of a washing machine according to Embodiment 1 of the present invention. Main part exploded perspective view of the washing machine Cross section of the main part of the washing machine Block diagram of the washing machine The figure which shows the sequence of the washing process of the same washing machine Longitudinal sectional view of a first embodiment of a conventional washing machine Partially cutaway perspective view of the second embodiment of the washing machine

  According to a first aspect of the present invention, an outer tub elastically suspended in a housing, an inner tub rotatably supported in the outer tub, driving means for rotationally driving the inner tub, and an upper portion of the casing are provided. A water supply valve having a plurality of discharge ports, a detergent tank that is provided in the upper part of the housing and stores liquid detergent, a pump that pressurizes the detergent tank, and a detergent receiver that temporarily receives the liquid detergent sent from the detergent tank Liquid detergent automatic charging device composed of the above, a detergent water supply hose that is connected to the detergent receiving part and injects liquid detergent into the tank, and controls the operation of the drive means, water supply valve, pump, etc., washing, rinsing Control means for sequentially controlling a series of steps of dehydration, and the control means operates the pump so that the liquid detergent in the detergent tank is stored in the tank via the detergent receiving portion and the detergent injection hose. Before being put in By operating the water supply valve, water is supplied into the tank through the detergent receiving part and the detergent pouring hose from the discharge port, and the detergent receiving part and the detergent pouring hose are washed so that the liquid detergent is received in the detergent receiving part. It can be prevented from remaining in the inside of the unit or the detergent water supply hose or gelation, and the charging performance of the liquid detergent can be maintained.

  According to a second aspect of the present invention, in particular, in the first aspect of the invention, the liquid detergent automatic charging device comprises a check valve in the detergent receiving part, and the liquid detergent from the detergent receiving part to the detergent tank has a reverse flow or discharge port. By blocking the inflow of the supplied water, moisture in the air and steam generated from hot water infiltrate into the detergent tank, and the liquid detergent gels in the detergent tank. It is possible to prevent the performance of the system from being fully exhibited. Further, it is possible to prevent water supplied from the discharge port from flowing into the detergent tank.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the thing of the same structure as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
1 is a longitudinal sectional view of a washing machine according to Embodiment 1 of the present invention, FIG. 2 is an exploded perspective view of a main part of the washing machine, and FIG. 3 is a cross-sectional view of a main part of the washing machine.

  In FIG. 1, a housing 41 is provided with an outer tub 43 that is elastically suspended by a plurality of suspensions 42 and absorbs vibration during dehydration by the suspensions 42. Inside the outer tub 43, an inner tub 44 for storing clothes and objects to be dried is disposed rotatably around a washing / dehydrating shaft 45 having a hollow and double structure. Further, a pulsator 46 that stirs the object to be dried is rotatably arranged.

  The inner peripheral wall of the inner tank 44 is provided with a number of drain holes for dehydration and a number of vent holes 44a for drying, and a fluid balancer 47 is provided above. A motor (driving means) 48 is attached to the outer bottom of the outer tub 43 and is connected to the inner tub 44 or the pulsator via the clutch 49 and the washing / dehydrating shaft 45 for switching the transmission of rotational force to the washing / dehydrating shaft 45 during washing or dehydrating. 46 is connected. The pulsator 46 has a substantially pan-like shape having an inclined surface 50 on the outer periphery, and forms a stirring protrusion 51. The clothes are stirred during the washing process, and the object to be dried is rotated by the pulsator 46 during the drying process. It is easy to soar upward along the inclined surface by centrifugal force. In other words, the clothes are configured to move left and right (in the rotational direction) and also move up and down by stirring.

  An inner tank cover 35 is attached to the inner peripheral wall of the inner tank 44, and the inner tank 44 constitutes a detergent charging path 36 for charging powder detergent. An inner tank cover opening 59 is formed at the lower end portion of the inner tank cover 35, and a detergent container lid 37 is attached to the upper end portion so as to be freely opened and closed. When powder detergent is put in with the detergent lid 37 opened, the detergent falls to the vicinity of the inner tank cover opening 59, and when the lid is closed and the washing operation is started, the powder detergent is generated by the water flow generated by the rotation of the pulsator 46. Is agitated and eluted into the wash water.

  The heat exchange duct 52 having a drying function dehumidifies the circulating hot air (circulating air), and one end of the heat exchange duct 52 is connected to a drainage passage port 54 provided at the lower portion of the outer tub 43 through the connection duct 53. The other end is connected to the inlet side of the hot air blowing means 61 constituting the hot air circulation path 57.

  The warm air blowing means 61 is provided with a heater 56, a drying fan 55, which will be described later with reference to FIG. 4, a filter (not shown) for collecting lint generated from clothes, and the like. The upper bellows-like hose 58 having the hot air jet hole 60 is connected. Further, a temperature detecting means 62 (described later in FIG. 4) for detecting the temperature of the circulating air entering the hot air blowing means 61 is provided on the inlet side of the hot air circulation path 57, and heated by a heater on the outlet side. A temperature detecting means 63 for detecting the temperature of the circulating air is provided to detect the circulating air temperature during the drying process.

  The outer tub 43 is provided with an outer tub cover 65 that hermetically covers the upper surface of the outer tub 43, and the outer tub cover 65 is provided with a hot air blowing hole 60 from the upper and lower bellows-like hose 58 that can be expanded and contracted. Yes. Further, an inner lid 66 is provided on the outer tank cover 65 so as to be freely opened and closed so that clothes can be taken in and out.

  An upper frame body 68 having a clothing insertion port 67 is attached to the upper portion of the housing 41 at a substantially central portion, and an outer lid 69 is provided so as to be able to open and close so as to cover the clothing insertion port 67.

  Further, a support member 71 equipped with the above-described hot air blowing means 61, the water supply valve 70, and the like is provided inside the rear portion of the upper frame 68.

  The water supply valve 70 has a multi-valve configuration in which water channels to two or more discharge ports can be switched open and closed, and water supplied from tap water or the like has a smaller valve opening area than one water channel and has a small flow rate of water. Is connected to a liquid detergent automatic charging device 64, which will be described later, through a washing hose 92 from a configuration for flowing water, and through a water supply hose 73 from a configuration for flowing a large flow of water with a larger valve open area than the other water channel, The water is supplied to the inner tub 44 as wash water through a water injection member 97 (described later in FIG. 2) provided on the support member 71.

  The support member 71 inside the upper frame 68 can store an amount of liquid detergent that can be used for a plurality of washings, and automatically puts the liquid detergent into the outer tub 43. 64 is configured. A flexible detergent water injection hose 72 is connected between the liquid detergent automatic injection device 64 and the outer tank cover 65, and the liquid detergent sent from the liquid detergent automatic injection device 64 passes through this detergent water injection hose 72. Then, it is dropped between the outer tank 43 and the inner tank 44. In addition, since the detergent water supply hose 72 is flexible, even when the entire outer tank 43 that is a vibration system is swung during dehydration, there is almost no influence on the vibration system and the detergent water supply hose 72 itself.

  A drain valve 74 for draining the water in the outer tub 43 is provided at the bottom of the outer tub 43, and is connected to the heat exchange duct 52 and the connection duct 53 via the drain duct 75, and the connection duct 53 and the heat exchange duct 52 are connected. The waste water from the water is guided to a drain duct 75 and a drain valve 74 and drained from the drain hose 76 to the outside of the machine.

  A conductivity detecting means 78 having a pair of electrodes 94 for detecting the conductivity of washing water and detecting the presence or absence of water and the type of detergent is provided inside the outer periphery of the outer tub 43. Since it is below the upper surface of the outer periphery of the pulsator 46 at the lower part of 43, it is difficult to be affected by the water flow caused by the rotation of the pulsator 46, and the conductivity can be detected stably.

  The cooling blower 79 is attached to the side surface of the housing 41 and is configured to blow air so as to cool the outer tub 43, the heat exchange duct 52, and the like inside the housing 41.

  The control device 80 is integrally formed, and is disposed substantially vertically on the back surface (back cover) 81 of the housing 41, and a cooling blower 79 is provided below the control device 80. The control device 80 is covered and protected by a cover 82.

  An operation display unit 85 including an input setting unit 83 and a display unit 84 described later with reference to FIG. 4 is provided on the front surface of the upper frame 68.

  In the exploded perspective view of the main part of FIG. 2, the support member 71 provided at the rear inner side of the upper frame 68 absorbs a water supply valve 70 for supplying tap water into the water tank, bath water and the like into the water tank. A water suction pump 91 to be supplied, a hot air blowing means 61 including a hot air circulation path 57 and the like, an automatic liquid detergent charging device 64 and the like are mounted.

  The liquid detergent automatic charging device 64 is provided with a detergent replenishing port 38 for replenishing liquid detergent in a detergent tank 77 that can store a quantity of liquid detergent that can be used for a plurality of washings. The detergent tank 77 can be sealed. Further, a detergent pouring hose 72 that communicates with the inside of the detergent tank 77 and is connected to the outer tank cover 65 is provided. The air pressure in the detergent tank 77 sealed by the air pump 40 is increased, and the liquid detergent is washed by the air pressure. The tank 77 is configured to be dripped between the outer tank 43 and the inner tank 44 via the detergent water supply hose 72.

  The support member 71 is attached from below the upper frame 68, screws 95 a and 95 b are screwed from the rear surface of the upper frame 68, and screws 95 c and 95 d are screwed from the upper surface of the upper frame 68, While fixing to the frame 68, the rear part of the support member 71 is fixed to the rear surface of the housing 41 with screws 96a and 96b. As a result, the upper frame 68 is attached in a substantially vertical direction so that the front surface of the upper frame 68 is upward by removing the screws 96a and 96b with the support member 71 attached and fixed with the screws 95a to 95d. The housing 41 can be removed.

  3, an air hose 31 is connected between the upper surface of the detergent tank 77 of the liquid detergent automatic charging device 64 and the air pump 40. A liquid discharge hose 33 is connected between the discharge cylinder 102 disposed at the bottom of the detergent tank 77 and the detergent receiver 32 integrally formed at the lower part of the support member 71, while the bottom of the detergent receiver 32. A detergent pouring hose 72 is connected between the liquid discharge port 100 formed in the above and the connection port 101 formed in the outer tank cover 65.

  Further, in the detergent receiving part 32, the reverse flow of the liquid detergent from the detergent receiving part 32 to the liquid discharge hose 33 on the detergent tank 77 side or the inflow of water supplied from the small capacity discharge port 104 is blocked. A check valve 34 is configured.

  An opening 98 having an upper end opened so that the portion of the liquid outlet 100 of the detergent receiver 32 is at atmospheric pressure is formed integrally with the support member 71 above the detergent receiver 32.

  Further, the water supply valve 70 is configured to be able to switch between a large-capacity discharge port 103 and a small-capacity discharge port 104 for supplying water to the inner tank 44, and the small-capacity discharge port 104 is formed at a substantially intermediate position of the open port 98. The cleaning hose connection port 99 is connected via a cleaning hose 92.

  FIG. 4 is a block circuit diagram of the washing machine according to Embodiment 1 of the present invention.

  In the block circuit diagram of FIG. 4, the control device 80 includes a motor (driving means) 48, a clutch 49, a drying fan 55 and a heater 56 constituting a warm air blowing means 61, and a drain valve via a load driving means 86. 74, a cooling fan (cooling means) 79, a water supply valve 70, an air pump 40, and the like are controlled, and a control means 87 for controlling each step of washing, rinsing, dehydration and drying is provided.

  The control means 87 is constituted by a microcomputer or the like, and starts operating when power is supplied from the commercial power supply 88 when the power switch 89 is turned on. The cloth amount detection means 93, the water level detection means 90, and the temperature detection means 62 and 63 Based on the contents set by the user's input in the input setting means 83, the setting contents are displayed on the display means 84, and through the load driving means 86 composed of a bidirectional thyristor, a relay and the like. The operation of the motor 48, the clutch 49, the drying fan 55, the heater 56, the drain valve 74, the cooling fan 79, the water supply valve 70, the water absorption pump 91, etc. is controlled, and the steps of washing, rinsing, dehydration and drying are controlled. Control. The input setting unit 83 and the display unit 84 constitute an operation display unit 85.

  The control means 87 detects the presence or absence of washing water and the type of detergent based on the conductivity of the washing liquid obtained from the conductivity detection means 78 and the rate of change thereof, and controls each stroke.

  Then, the control means 87 turns off the heater 56 when the temperature detected by the temperature detection means 63 reaches a first predetermined temperature (for example, 110 ° C.) during the drying process, and the temperature detection means 62 at that time. When the second predetermined temperature (for example, 2k) falls from the temperature due to the above, the heater 56 is operated to adjust the temperature of the circulating air.

  In the above configuration, the basic operation of the washing process will be described.

  FIG. 5 shows an example of a sequence table of the washing process of the washing machine in the first embodiment of the present invention.

  In the washing process, the user opens the outer lid 69, opens the inner lid 66, puts clothes into the inner tub 44, sets the operation course and automatic addition of liquid detergent with the input setting means 83, and starts operation. Then, the amount of cloth put in is detected by the cloth amount detecting and determining means 93, the water level and the detergent amount are determined according to the cloth amount by the control means 87, and displayed on the display means 84.

  Then, the control device 80 operates the air pump 40 for a predetermined time via the load driving means 86 in accordance with the determined detergent amount.

  When the air pump 40 is operated, the air pressure in the sealed detergent tank 77 is increased via the air hose 31, and the liquid detergent in the detergent tank 77 is pumped into the detergent receiver 32 through the liquid discharge hose 33. The The sent liquid detergent is dropped between the outer tub 43 and the inner tub 44 through the detergent water injection hose 72 from the liquid discharge port 100 formed at the bottom of the detergent receiver 32.

  Even after the air pump 40 has been operated for a predetermined time, even if the air pump 40 is stopped, the detergent receiver 32 is open to the atmosphere through the opening 98, and therefore remains in the detergent receiver 32 due to atmospheric pressure. All liquid detergent is discharged.

  Thereafter, in the process of water supply b, the small-capacity discharge port 104 of the water supply valve 70 is operated, and from the cleaning hose 92, the cleaning hose connection port 99, the open port 98, the detergent receiving portion 32, the liquid discharge port 100, and the detergent Water is supplied to the water level of rank 1 through the water injection hose 72 into the tank. By this water supply, the remaining liquid detergent from the detergent receiving part 32 where the check valve 34 is configured to the connection port 101 of the outer tub cover 65 is washed away with tap water.

  The water level is set so that the water level increases from rank 1 to rank 9 in order, rank 3 is a lower water level than the upper surface of the outer peripheral portion of pulsator 46, and rank 4 to rank 9 are cloths. It is a water level where washing and stirring b is performed according to the amount, and rank 9 is the highest water level. As described above, rank 1 is supplied from the small-capacity discharge port 104 side of the water supply valve 70, while ranks 2 to 9 are performed from the large-capacity discharge port 103 side. FIG. 4 shows a sequence example when the amount of cloth is large and a high water level (here, rank 9) is detected.

  Rank 1 is a level that is approximately 100 mm lower than the upper surface of the outer peripheral portion of the pulsator 46, and the conductivity detection means 78 is immersed in water. The conductivity detection means 78 detects the water level, and the water supply b stops.

  The water level detecting means 90 is an inexpensive method generally used in washing machines that detects the water pressure received by an air trap (not shown) provided in the outer tub 43. In this method, the pulsator It is difficult to accurately detect the water level of the lowest rank that is approximately 100 mm lower than the upper surface of the outer periphery of 46 because the water pressure is very small. However, by detecting with the conductivity detecting means 78, it is possible to accurately detect that the water level has reached the lowest rank when the water touches the pair of electrodes 94 of the conductivity detecting means 78.

  Next, with the drain valve 74 closed, the clutch 49 of the transmission mechanism is switched to the dehydrating side, and the power of the motor 48 is transmitted to the inner tank 44 through the dehydrating shaft and rotated, so that the inner tank 44 and the pulsator are rotated. 46 are rotated together at a low speed of about 100 r / min (tank rotation operation). As a result, the washing liquid in the tub slowly rotates between the inner tub 44 and the outer tub 43 by the action of centrifugal force, and the detergent is sufficiently dissolved without the washing liquid adhering to dirt on the clothes.

  Next, while supplying water from the large-capacity discharge port 103 side to rank 2 (water supply a), with the drain valve 74 closed, the clutch 49 of the transmission mechanism is switched to the dewatering side, and the power of the motor 48 is changed. The rotation is transmitted to the inner tank 44 via the dehydrating shaft and rotated, and the inner tank 44 and the pulsator 46 are rotated together at a lower speed around 35 r / min (tank rotation). Then, after stopping the tank rotation, water is supplied from the large-capacity discharge port 103 side to rank 3 (water supply a), and the power of the motor 48 is transmitted to the pulsator 46 through the washing shaft by the clutch 49 of the transmission mechanism. Then, the agitation that the pulsator 46 rotates is performed, and further, water is supplied from the large-volume discharge port 103 side to the rank 5 (water supply a), and the agitation that the pulsator 46 rotates is performed.

  That is, the water level in the normal washing according to the amount of cloth determined by the cloth amount detecting means 93 is gradually increased from the water level lower than the rated water level (in this example, it is determined to be high-capacity clothing and rank 9 is the high water level). Water is supplied to the water, and the detergent is washed at a high concentration each time the tank is rotated and stirred. Further, water is supplied to the water level of rank 9, and normal washing and stirring b is performed.

  As described above, in the present embodiment, the air pump is operated by the control means to increase the air pressure in the sealed detergent tank of the liquid detergent automatic charging device, and the liquid detergent stored by the air pressure is supplied to the detergent tank. From once, after pumping to the detergent receiving part maintained at atmospheric pressure, and then through the detergent water supply hose connected to the outer tank cover, the small water flow side of the water supply valve is operated, Water is supplied into the outer tub through the opening, the detergent receiving portion, and the detergent water supply hose, and the inside of the detergent receiving portion and the inside of the detergent water supply hose are washed.

  As a result, liquid detergent does not remain inside the detergent receiving part or inside the detergent watering hose even after dripping from the detergent watering hose due to its own weight, and it does not react with moisture in the air and gel. It can be correctly put into the tank and can exhibit predetermined performance. Furthermore, since the check valve portion configured in the detergent receiving portion is also washed, the check valve does not malfunction due to aging.

  Furthermore, the discharge of the water supply valve is switched to the large-capacity discharge port and the small-capacity discharge port, and the water supply from the small-capacity discharge port is washed inside the detergent receiving part and the detergent injection hose, and the water level rank is low. Since the supply to 1 is performed, the water supply does not leak upward or outward from an opening, a support member or the like for keeping the detergent receiving portion or the inside of the detergent receiver at atmospheric pressure.

  Further, the liquid detergent automatic charging device is configured such that a check valve is formed in the detergent receiving part to block the back flow of the liquid detergent from the detergent receiving part to the detergent tank.

  As a result, when washing with water in the air or hot water such as bath water in the washing machine, the steam generated from the hot water penetrates into the sealed detergent tank, and the liquid detergent in the detergent tank. Can be prevented from being gelled and denatured so that the performance as a liquid detergent is not sufficiently exhibited.

  As described above, since the washing machine according to the present invention can effectively exhibit the charging performance of the liquid detergent, it can be applied to various washing machines such as a drum type washing machine.

32 Detergent receiving part 34 Check valve 40 Air pump 41 Housing 43 Outer tank 44 Inner tank 46 Pulsator 48 Motor (drive means)
64 Liquid detergent automatic charging device 65 Outer tank cover 68 Upper frame 70 Water supply valve 71 Support member 72 Detergent water injection hose 77 Detergent tank 87 Control means 98 Open port 102 Discharge cylinder 103 Large capacity discharge port 104 Small capacity discharge port

Claims (2)

An outer tub elastically suspended in the housing, an inner tub rotatably supported in the outer tub, a driving means for rotationally driving the inner tub, and a plurality of discharge ports provided at the upper part of the housing. A liquid comprising a water supply valve, a detergent tank provided in the upper part of the housing, for storing a liquid detergent, a pump for pressurizing the detergent tank, and a detergent receiving part for temporarily receiving the liquid detergent sent from the detergent tank A series of processes of washing, rinsing and dewatering by controlling the operation of the detergent automatic charging device, the detergent water supply hose which is connected to the detergent receiving part and injects liquid detergent into the tank, the drive means, the water supply valve, the pump, etc. Control means for sequentially controlling, after the control means, by operating the pump, to put the liquid detergent in the detergent tank into the tank through the detergent receiving portion, the detergent water injection hose, Operates the water supply valve Allowed by the detergents receiving portion from the discharge port, through said detergent injection hose supplying water in the tank, the detergent receiving unit, a washing machine, characterized by washing the detergent water injection hose. In the liquid detergent automatic charging device, a check valve is configured in the detergent receiving part, and the reverse flow of the liquid detergent from the detergent receiving part to the detergent tank or the inflow of water supplied from the discharge port is blocked. The washing machine according to claim 1.

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