JP5799199B2 - Drum washing machine - Google Patents

Description

  The present invention relates to a detergent supply device for a drum-type washing machine.

  Conventionally, in this type of washing machine for drum type washing machines, it has been proposed to keep the pressure of the supplied wash water constant in order to prevent the generation of detergent foam due to the high and low water supply pressure. (For example, refer to Patent Document 1).

  FIG. 6 is an exploded perspective view showing a configuration of a conventional drum type washing machine described in Patent Document 1, and FIG. 7 is a plan view showing a flow path configuration of a detergent supply device of the drum type washing machine. It is.

  As shown in FIG. 6, a cylindrical water tank 11 installed inside the main body 10 for containing washing water, and a water tank 11 is rotatably installed inside the water tank 11, and a plurality of dewatering holes are formed on the wall surface. And a cylindrical washing tub (rotary drum) 12. A drive motor 13 that rotates the washing tub (rotating drum) 12 in the forward direction or the reverse direction is installed below the water tub 11 in order to perform washing, rinsing, and dewatering operations.

  A water supply device 20 and a detergent supply device 15 are installed on the upper portion of the water tank 11 as washing water is supplied into the water tank 11 and detergent is supplied in the water supply process.

  The water supply device 20 is connected to an external water supply hose (not shown) to control water supply, and a plurality of water supply pipes connecting the water supply valve 21 and the detergent supply device 15. And a connecting pipe 24 that guides the water that has passed through the detergent supply device 15 into the water tank 11.

  The detergent supply device 15 includes a box-shaped housing 30 having an opening 34 opened on the front surface, and a detergent case 35 detachably coupled to the inside of the housing 30 through the opening 34 of the housing 30. Including. The detergent supply device 15 is installed on the upper front portion of the main body 10 in order to attach and detach the detergent case 35 like a drawer outside the main body 10.

  In the plan view showing the flow path configuration of the detergent supply device of FIG. 7, since the pressure adjusting hole 45 a is formed in the rinse agent charging section water supply flow path 45, high-pressure washing water is passed through the rinse agent charging section water supply path 45. When flowing, a large amount of washing water flows out to the bleach charging portion 35d through the pressure adjusting hole 45a, and when a low pressure washing water flows, a relatively small amount of washing water flows through the pressure adjusting hole 45a. It comes out to 35d.

  Accordingly, the pressure of the washing water reaching the rinsing agent charging unit water supply unit 43 is adjusted within a predetermined range while passing through the rinsing agent charging unit water supply channel 45, and therefore the washing water sprayed to the rinsing agent charging unit 35c. The pressure of the water is also adjusted within a predetermined range. Foam is generated in the detergent by supplying high-pressure washing water, the foam is filled in the detergent container, water supply is not smooth, and water is supplied from other than the predetermined passage. It is designed to prevent leakage and the like.

JP 2006-626 A

  However, in the conventional configuration, for example, tap water supplied from the outside of the washing machine is at a pressure higher than a predetermined pressure, and is effective when supplied at a large flow rate. When the detergent foam is filled (for example, the foam generated in the water tank flows back into the detergent container), the water supply passage is blocked, and it is impossible to prevent the water supply from flowing out of the predetermined passage. .

  In particular, in addition to the rotating agitation of the rotating drum, in recent years, in order to improve the washing effect and to effectively use the washing water, a circulating water flow system in which the washing water is circulated by a pump and sprinkled on the clothes is often used. This method is characterized by generating a large amount of detergent foam, and there is a problem that the pressure in the water tank increases due to the generation of foam and flows into the detergent container.

  The present invention solves the above-mentioned conventional problems, and provides a configuration in which, when detergent bubbles generated in a water tank flow back into a detergent supply device, the detergent bubbles are diluted to prevent occurrence of problems. It is an object.

In order to solve the conventional problems, a water tank that rotatably supports a rotating drum having a plurality of dewatering holes, a detergent supply device that supplies washing water containing detergent to the water tank, the water tank, and the water tank A water supply connecting pipe that is connected to the detergent supply device and includes a backflow prevention means, a first water supply valve that supplies water to the detergent supply device, and a first water supply passage that guides water supplied from the first water supply valve A water tank air vent pipe connecting and connecting the water tank air vent connecting portion and the water tank configured in the detergent supply device, and a control device for controlling a series of processes such as washing, rinsing and dehydration, the first water supply passage Is configured to supply washing water to the left passage and the right passage, and the left passage and the right passage have a plurality of water inlets, and the washing water falls through the plurality of water inlets and Supplied in the water tank through the water supply pipe Is a part of the washing water flowing into the left passageway, reach the water tub air vent connecting portion, it is intended to be supplied flows into the water tub air vent pipe into the water tank.

  Thereby, even if a detergent bubble generate | occur | produces in the inside of a water tank by controlling a 1st water supply valve and preventing defoaming and accumulation | storage of a detergent foam inside a water tank air vent pipe, the pressure in a water tank increases. It becomes difficult to prevent the occurrence of a problem that the water supplied at the time of water supply or detergent supply flows out of a predetermined passage or overflows from the detergent supply device.

  The drum type washing machine of the present invention can dilute the detergent bubbles that have flowed back from the water tank into the detergent supply device, and prevent the occurrence of problems such as water leakage.

The longitudinal cross-sectional view of the drum type washing machine in embodiment of this invention The exploded perspective view of the detergent supply device of the drum type washing machine Exploded plan view of detergent supply device of the drum type washing machine Control circuit block diagram of the drum type washing machine Stroke operation diagram of the drum type washing machine The exploded perspective view which showed the structure of the conventional drum type washing machine The top view which showed the flow-path structure of the detergent supply apparatus of the drum type washing machine

A first aspect of the invention is a water tank that rotatably supports a rotating drum having a plurality of dewatering holes, a detergent supply device that supplies wash water containing detergent to the water tank, the water tank, and the detergent supply device. And a water supply connecting pipe having backflow prevention means, a first water supply valve for supplying water to the detergent supply device, a first water supply passage for guiding water supplied from the first water supply valve, and the detergent A water tank air vent connection portion configured in a supply device and a water tank air vent pipe connecting and connecting the water tank; and a control device for controlling a series of processes such as washing, rinsing, and dehydration, the first water supply passage being a left passage A plurality of water inlets are formed in the left passage and the right passage, and the washing water falls through the plurality of water inlets to connect the water supply connecting pipe. Is supplied into the water tank To some of the washing water flowing, reach the water tub air vent connecting portion, wherein are those water tank flows into the vent line is supplied to the water tank, and controls the first water supply valve, water tank By preventing defoaming and accumulation of detergent bubbles inside the air vent pipe at all times, even when detergent bubbles are generated inside the water tank, the pressure inside the water tank is less likely to increase, and the water supplied when supplying water or supplying detergent is predetermined. Occurrence of problems such as flowing out of other passages or overflowing from the detergent supply device can be prevented.

In the second invention, in particular, the washing process of the first invention has a pre-washing process and a main washing process, and the control device operates the first water supply valve during the pre-washing process, and the first water supply after the detergent for have prewashing than the passage supplied to the tub, the water supply from the first water supply valve, which has a configuration in which defoaming penetrated detergent foam water tank vent line, washing with prewash had stroke Even when the water circulation pump is driven, the detergent foam is constantly defoamed inside the water tank air vent pipe. It is possible to prevent the problem of overflowing from the detergent supply device.

The third aspect of the invention includes a second water supply valve that supplies washing water to the detergent supply device of the first or second invention, and a second water supply passage that guides water supplied from the second water supply valve. The washing process includes a pre-washing process and a main-washing process, and the control device operates the second water supply valve in the main-washing process, so that the main washing detergent is supplied from the second water supply passage to the water tank. after feeding, the operating the first water supply valve, which detergent bubbles having entered the water tank vent line was configured to defoaming, even when driving a wash water circulation pump in the washing step, the internal water tank vent line Detergent bubbles are always removed and accumulation of bubbles is prevented, so that water at the beginning of the rinsing process, which is the next process of the main washing process, flows out of the specified passage or overflows from the detergent supply device. The occurrence of defects can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a drum type washing machine according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a detergent supply device for the drum type washing machine, and FIG. 3 is a detergent for the drum type washing machine. FIG. 4 is a control circuit block diagram of the drum type washing machine, and FIG. 5 is a stroke operation table of the drum type washing machine.

  In FIG. 1, a drum-type washing machine main body 50 having a lid 62 configured to be openable and closable on the front surface includes a cylindrical water tank 51 installed to store washing water, and the water tank 51. A cylindrical rotating drum 53 that is rotatably installed and has a plurality of dewatering holes 52 formed on the wall surface is provided.

  In the upper part of the water tank 51, washing water is supplied to the inside of the water tank 51, and a detergent is supplied. A water supply valve for pre-washing (first water supply valve) 54, a water supply valve for main washing (second water supply valve) The water supply valve) 55 and the detergent supply device 56 are respectively installed.

  A motor 57 that rotationally drives the rotating drum 53 in the water tank 51 in the forward direction or the reverse direction is installed below the water tank 51 in order to perform washing, rinsing, and dewatering operations.

  The pre-wash water supply valve 54 and the main-wash water supply valve 55 are connected to an external water supply hose 58 on the outside of the machine and a plurality of water supply pipes 59a and 59b connecting the detergent supply device 56 to the inside of the machine. It is plumbed. The detergent supply device 56 includes a water supply connecting pipe 60 that guides the passed water to the inside of the water tank 51, and a detergent case 61 that can be pulled out in front of the main body in order to store detergent, softener, finishing material, and the like. The

The water supply connection pipe 60 is provided with a check valve (not shown), and is configured with backflow prevention means so that bubbles, air, and washing water from the water tank 51 flow backward and do not enter the detergent supply device 56 side. Has been. Moreover, even if it is not a check valve, it is composed of a general U-shaped trap, and water is always accumulated in the U-shaped part, so that bubbles, air, and washing water from the water tank 51 flow backward and enter the detergent supply device 56 side. You may comprise the backflow prevention means which does not.

  A heater 63 for warm water washing is formed at the bottom of the water tank 51, and a drain pipe 64 for draining the washing water is formed below the heater 63. The drain cylinder 64 is connected to a drain pipe 65, passes through a filter 66 for removing lint and foreign matter, and communicates with a drain discharge hose 68 from a drain pump (DP) 67. If this drain pump (DP) 67 is driven, the washing water in the water tank is discharged out of the machine.

  A suction pipe 69 is piped from the filter 66 to communicate with a washing water circulation pump (WP) 70, and further inside the vicinity of the lid 62 via a circulation water discharge hose 71 on the discharge side of the washing water circulation pump (WP) 70. From the discharge port 72 toward the inside of the rotary drum 53.

  When the washing water circulation pump (WP) 70 is driven, the washing water inside the rotary drum 53 is sucked from the drain pipe 64 and constitutes the circulating water 73 that collides with the clothes inside the rotary drum 53 from the discharge port 72 to be washed. The effect is improved. However, since detergent bubbles are generated in the water tank 51 at the same time, the internal pressure in the water tank 51 is increased.

  The control device 49 attached to the inside of the main body 50 includes the motor 57, the pre-washing water supply valve (first water supply valve) 54, the main washing water supply valve (second water supply valve) 55, and the drainage pump (DP). 67, a washing water circulation pump (WP) 70 and the like are controlled to control a series of steps such as washing, rinsing and dehydration, and input setting means and display means (not shown) are provided.

  In the drum type washing machine of the present application, the washing process is controlled in two steps, the pre-washing process and the main washing process, in order to improve the washing performance. In both processes, the washing water circulation pump (WP) 70 is always or It has a control for driving for a predetermined time (details will be described later).

  In the upper part of the water tank 51, a water tank air vent pipe 74 constituted by a flexible hose is arranged and connected to the upper part of the detergent supply device 56. This is to prevent the detergent and water supply from being smoothly supplied from the detergent supply device 56 to the water tank in the main washing process when the internal pressure of the foam generated in the water tank 51 by the detergent or the like increases in the pre-washing process or the like. In addition, it is configured for the purpose of reducing the pressure inside the water tank.

  In the exploded perspective view of the detergent supply device of FIG. 2, the detergent supply device 56 is an upper portion in which a water passage 89 having a large number of water injection ports 78 is formed on the upper surface of a lower case 77 that houses the detergent case 61 so that it can be pulled out forward. In order to supply the washing water before flowing into the water passage 89 to the water tank 51, the water filling space portion 79 is formed by water-tightly heat-welding the water injection lid body 75 made of polypropylene resin or the like to the case 76. A water supply path 92 is provided at the bottom.

  The detergent case 61 includes a main-washing detergent storage unit 80 and a pre-washing detergent storage unit 81, and the detergent introduced into each storage unit by the user is washed away while being dissolved by the water supplied from the upper case 76. Then, the water is supplied to the water tank 51 from the lower case 77 and the water supply connection pipe 60 through the rear discharge port 82.

  The lower case 77 is connected to a water supply connecting pipe 60 for supplying washing water to the water tank 51, and the water tank air vent pipe 74 is connected to the rear upper part of the upper case 76.

  When the prewash water supply valve (first water supply valve) 54 or the main wash water supply valve (second water supply valve) 55 is operated, water is supplied from a plurality of water supply pipes 59 provided in the upper case 76. A part of the washing water is supplied from the water supply path 92 to the water tank, and the other washing water is supplied from the water supply space 79 to the detergent case 61 below from the water inlet 78 of the water supply path 89. The detergent that has been supplied is supplied to the water tank 51.

  As described above, in the drum type washing machine of the present application, the washing process is controlled by the two processes of the pre-washing process and the main washing process to improve the cleaning performance. Therefore, in order to supply dedicated detergents for the pre-washing process and the main-washing process, the pre-washing water supply valve 54 and the main-washing water supply valve 55 are used to store the pre-washing detergent container 81 and the main-washing detergent. Each unit 80 is supplied with water, and a dedicated detergent is supplied from each.

  In the exploded plan view of the detergent supply device of FIG. 3, the water passage configuration of the upper case 76 will be described.

  In FIG. 3, a prewash detergent water supply passage (first water supply) communicated with a prewash water supply valve (first water supply valve) 54 and a prewash water supply discharge cylinder 93 connected to a water supply pipe 59a. A main wash detergent water supply passage (second water supply passage) 84 communicating with the main wash water supply discharge tube 94 connected to the main wash water supply valve (second water supply valve) 55 and the water supply pipe 59b; A water supply path 92 that is an opening for supplying water to the water tank is configured.

  At the start of the pre-washing process, the pre-wash water supply valve (first water supply valve) 54 is operated, discharged from the pre-wash water supply discharge tube 93, and supplied from the pre-wash detergent water supply passage (first water supply passage) 83. The washed water flows forward through the passage as indicated by an arrow A, and is divided into a left turn 86 and a right passage 87, each of which has a large number of water inlets 78, separated into left and right by a left bypass 85 in the figure. While flowing in, it falls widely downward from the water injection port 78, and the prewash detergent previously introduced from the prewash detergent storage part 81 of the detergent case 61 described in FIG. 2 is washed away and supplied to the water tank.

  When the main washing water supply valve (second water supply valve) 55 is operated at the start of the main washing process after the prewashing process, the main washing detergent water supply passage (second water supply) is discharged from the main washing water supply discharge cylinder 94. The washing water supplied from the passageway) flows forward through the passage as indicated by a dotted arrow B, and is divided into U-turns to the left and right by a detour bar 88 on the left side in the figure, and a left passage 90 having a plurality of water injection ports 78 formed respectively. Then, while flowing into the right passage 89, it falls widely downward from the water inlet 78, and the main washing detergent previously introduced from the main washing detergent storage portion 80 of the detergent case 61 described in FIG. 2 is washed away and supplied to the water tank. .

  Part of the washing water flow A for the pre-washing process flows in the left passage 86 and reaches the water tank air vent connection portion 91 of the water tank air vent pipe 74 connected to the right end in the figure of the upper case 76 in the state of arrow C. The portion is configured such that the left passage 86 of the prewash detergent water supply passage and the water tank air vent connection portion 91 communicate with each other so as to flow into the water tank air vent pipe 74.

  In the control circuit diagram of FIG. 4, the control device 49 uses the control means 47 configured by a microprocessor or the like to control the contents set by the input setting means 48, and the motor 57, the pre-wash water supply valve (first water supply valve). ) 54, the load such as the washing water circulation pump (WP) 70 is controlled through the power switch means 46, and a series of processes such as washing, rinsing and dehydration are controlled.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated according to the stroke operation | movement figure of FIG.

  When the operation of the drum type washing machine is started, the pre-washing process (101) is first started, and the pre-washing detergent is supplied into the water tank together with the water by the operation of the pre-washing water supply valve (first water supply valve) 54. (103) The washing operation proceeds by stirring (104) rotating the rotating drum 53 in the forward or reverse direction. At this time, the washing water circulation pump (WP) 70 is also driven (105), and the washing circulation water flow Sprinkle the washing liquid on the clothes with circulating water 73 to enhance the washing effect.

  At this time, a large amount of foam may be generated in the water tank 51 due to the washing circulation water flow. At that time, when the pressure in the water tank 51 is increased, the main washing water supply valve (second water supply valve) 55 is operated (107) at the start of the main washing process (102) of the next process. The washing water supplied from the water supply passage (second water supply passage) 84 and the main washing detergent do not flow smoothly into the lower case 77 and the water supply connection pipe 60 to the water tank 51, and will overflow from the front of the detergent case 61. And

In order to prevent this, the water tank is depressurized by the water tank air vent pipe 74 to relieve the pressure in the water tank. If a large amount of detergent bubbles are generated, the water supply connection pipe 60 and the water tank air vent pipe 74 are Bubbles may invade into .

Therefore, during the pre-washing process (101), even after the pre-washing detergent has been supplied, the pre-washing water supply valve (first water supply valve) 54 is operated continuously or for a predetermined time (106). In the water flow arrow C shown, the detergent bubbles in the aquarium air vent connection part 91 and the aquarium air vent pipe 74 are diluted and defoamed to prevent the penetration and generation of detergent bubbles in the detergent supply device 56, and the inside of the aquarium 51. To prevent pressure rise.

  Therefore, in the water supply operation (107) of the main washing process (102) of the next process, the supplied washing water and the main washing detergent liquid do not overflow outside the detergent case.

  Further, in the main washing step (102), the main washing detergent is supplied by the main washing water supply valve (second water supply valve) 55 (107), the rotating drum 53 is agitated (112) and the washing water circulation pump (WP). Even during the operation of the washing circulation water flow by driving 70 (109), the pre-wash water supply valve (first water supply valve) 54 is operated continuously or for a predetermined time (108), so that the detergent bubbles in the water tank air vent pipe 74 are removed. Is diluted and defoamed to prevent detergent foam from accumulating in the water tank bleed tube 74.

  Therefore, when the rinse water supply operation (110) is performed in the rinse process (111) of the next process, the supplied rinse water does not overflow outside the detergent case.

  As mentioned above, even if detergent bubbles are generated inside the aquarium by preventing the defoaming and accumulation of detergent bubbles at all times by utilizing the water valve for pre-washing, It is difficult to increase the pressure of the water, and it is possible to prevent a problem that water supplied at the time of water supply or detergent supply flows out of a predetermined passage or overflows from the detergent case.

  As described above, the drum-type washing machine according to the present invention can prevent defoaming and accumulation of detergent bubbles at all times inside the aquarium air vent pipe by utilizing a pre-feed water supply valve. The present invention can also be applied to uses such as equipment having a plurality of water supply valves and washing machines other than drum type washing machines.

49 Control Device 51 Water Tank 52 Dewatering Hole 53 Rotating Drum 54 Prewash Water Supply Valve (First Water Supply Valve)
55 Water supply valve for main washing (second water supply valve)
56 Detergent supply device 60 Water supply connection pipe 61 Detergent case 70 Washing water circulation pump 74 Water tank air vent pipe 80 Detergent storage section for main washing 81 Prewash detergent storage section 83 Prewash detergent water supply path (first water supply path)
84 Water supply passage for main washing detergent (second water supply passage)
91 Aquarium air vent connection

Claims (3)

A water tank that rotatably supports a rotating drum having a plurality of dewatering holes, a detergent supply device that supplies washing water containing detergent to the water tank, a pipe connecting the water tank and the detergent supply device, and backflow A water supply connecting pipe provided with a preventing means, a first water supply valve for supplying water to the detergent supply device, a first water supply passage for guiding water supplied from the first water supply valve, and a water tank configured in the detergent supply device A water tank air vent pipe connecting and connecting the air vent connection portion and the water tank; and a control device for controlling a series of processes such as washing, rinsing, and dehydration. The first water supply passage is provided with washing water to the left passage and the right passage. In the left passage and the right passage, a plurality of water injection ports are formed, and the washing water falls through the plurality of water injection ports and is supplied into the water tank through the water supply connection pipe. And flowed into the left passage Serial part of the washing water reaches the water tub air vent connecting portion, the drum-type washing machine to be supplied to the water tank flows into the water tank vent line. The washing process includes a pre-washing process and a main washing process, and the control device operates the first water supply valve during the pre-washing process, and supplies the pre-washing detergent to the water tank from the first water supply passage. after, the water from the first water supply valve, a drum type washing machine according to claim 1 which has a structure for defoaming detergent bubbles having entered the tank vent line. A second water supply valve for supplying washing water to the detergent supply device and a second water supply passage for guiding water supplied from the second water supply valve are provided. The washing process has a pre-washing process and a main washing process. In the main washing process, the control device operates the second water supply valve, supplies the main washing detergent to the water tank from the second water supply passage, and then operates the first water supply valve to operate the water tank. drum-type washing machine according to claim 1 or 2 has a structure for defoaming penetrated detergent foam vent line.

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