JP2015089473A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce vibrations and noise in a washing machine including a drying function for circulating and supplying drying air into a water tub.SOLUTION: A washing machine includes: an outer case; a water tub elastically supported in the outer case; a rotary tub which is arranged inside the water tub and in which laundry is accommodated; an agitator disposed at an inner bottom part of the rotary tub; a heat exchanger provided in the outer case and generating drying air for drying the laundry; an exhaust duct for sucking the air in the water tub to the heat exchanger; and an air supply duct for circulating and supplying the drying air generated by the heat exchanger to the water tub. The heat exchanger has a form in which dehumidification means for performing dehumidification of the sucked air, a blower fan for circulating the air and heating means for heating the dehumidification air are assembled to make a unit in a case configuring an air passage, and it is provided by being mounted in the outer case. The exhaust duct and the air supply duct for connecting the heat exchanger and the water tub are connected to the upper part of the water tub.

Description

  Embodiments described herein relate generally to a washing machine.

  2. Description of the Related Art Conventionally, in a so-called vertical type washing machine provided with a rotating tub in which a garment is accommodated in a water tank, a drying function is added to circulate and supply drying air into the water tank to dry the clothes. As this drying function, a circulation air passage is connected to the upper and lower portions of the water tank at both ends, a heat exchanger is provided in the middle of the circulation air passage, and the air in the water tank is sucked and dried by the heat exchanger. Is generated, and the dry air is continuously supplied into the water tank without being discharged outside the machine through the circulation air passage (see, for example, Patent Documents 1 and 2).

  As a first conventional example, Patent Document 1 discloses an air-cooled heat exchanger in which a drying passage connected to an outer bottom portion of a water tank is provided so as to extend upward or outward from an outer box via a switching valve. In addition, it is configured to be connected to the upper lid of the water tank via an extendable hose through a heater and a circulation fan. Moreover, as a second conventional example, in Patent Document 2, a duct-shaped dehumidifying air passage that opens at the bottom of the water tank and extends upward is provided on the outer peripheral surface of the water tank, and the upper portion of the water tank is provided at the upper portion of the dehumidifying air path. The connected air supply air passage is connected, and a water-cooled heat exchanger, a blower fan, and a heater are provided in the dehumidification air passage.

JP 2000-225287 A JP 2008-54948 A

  By the way, in this type of vertical washing machine, the water tank is configured to be elastically supported (suspended) in the outer box by, for example, four hanging rods. The vibration of the water tank during rotation of the rotating tank and the noise accompanying the vibration become a problem. In the first conventional example, since a bellows-like duct (drying passage) is connected to the bottom of the water tank, this duct may affect the vibration system, and vibration and noise may increase. In the second conventional example, since the heat exchanger is attached to the outer peripheral surface of the water tank, the weight balance of the water tank is lost, the design of the vibration system is complicated, and vibration and noise may be increased depending on the load.

  Accordingly, a washing machine having a drying function that circulates and supplies drying air into a water tank and that can reduce vibration and noise is provided.

  The washing machine of the present embodiment is provided in an outer box, a water tank elastically supported in the outer box, a rotating tank disposed in the water tank and storing laundry, and an inner bottom portion of the rotating tank. An agitator, a heat exchanger provided in the outer box for generating drying air for drying the laundry, an exhaust duct for sucking air in the water tank into the heat exchanger, and the heat An air supply duct for circulating and supplying the dry air generated by the exchanger into the water tank, and the heat exchanger has a dehumidifying means for dehumidifying the intake air in a case constituting the air path, air A fan unit that circulates the air and a heating unit that heats the dehumidified air, and is attached to the outer box and provided, and is connected to the heat exchanger and the water tank. Both air ducts are connected to the top of the tank Characterized by the Rutokoro.

1 shows an embodiment and is a schematic longitudinal front view of a washing machine. The figure which shows the structure of the air path of a drying unit typically The exploded perspective view of the principal part showing the appearance of the dry operation part Block diagram schematically showing the electrical configuration of the washing machine

  Hereinafter, an embodiment will be described with reference to the drawings. FIG. 1 schematically shows the overall configuration of a vertical washing machine (fully automatic washing machine) 1 with a drying function according to the present embodiment. Here, in the outer box 2 having a substantially rectangular shape, a water tub 3 for storing washing water is elastically supported (suspended) by an elastic suspension mechanism 4. As shown only partially, the elastic suspension mechanism 4 has, for example, four suspension rods 4a provided at the four corners of the outer box 2, and springs 4b disposed at the lower end portions of the suspension rods 4a. The known configuration is provided.

  In the water tank 3, there is rotatably provided a vertical tank 5 having a cylindrical shape with a bottom. For example, a liquid-filled rotary balancer 6 is attached to the upper end of the rotary tank 5. In addition, a large number of dewatering holes 7 that also serve as ventilation holes are formed in the peripheral wall portion of the rotating tank 5. A laundry (not shown) is accommodated in the rotating tub 5, and the laundry is washed, rinsed, dehydrated, and dried.

  A stirring body 8 is disposed on the inner bottom of the rotating tank 5. Although not shown in detail, a drive mechanism unit 10 including a drive motor 9 (shown only in FIG. 4) is disposed on the outer bottom of the water tank 3. As is well known, the drive mechanism unit 10 has a clutch for selectively transmitting the rotation of the drive motor 9. That is, the rotating tub 5 is stopped at the time of washing and rinsing, and the stirrer 8 is alternately rotated at a low speed in both forward and reverse directions by a motor. At the time of dehydration, the rotating tub 5 is rotated together with the stirrer 8 at a high speed in one direction. Moreover, the rotating tank 5 and the stirring body 8 are rotated also at the time of the drying operation mentioned later.

  As shown in FIG. 2, a drain port 11 is formed at the bottom of the water tank 3, and a drain pipe 13 that forms a drain channel is connected to the drain port 11 via an electronically controlled drain valve 12. ing. Although not shown in detail, the drain pipe 13 is led out of the outer box 2 and connected to a household drainage facility. The drain valve 12 is configured to operate in conjunction with the clutch of the drive mechanism unit 10.

  As shown in FIG. 1, a water tank cover 14 is attached to the upper part of the water tank 3. As shown in FIG. 3, the water tank cover 14 is provided with an opening 14 a for entering and leaving the laundry located substantially at the center excluding the rear side, and an inner lid 15 for opening and closing the opening 14 a. Is installed. Further, the water tank cover 14 is provided with three connection ports 16, 17, and 18 that are located on the rear side of the opening 14 a and are arranged in the left-right direction. These connection ports 16, 17, and 18 are configured in a cylindrical shape that protrudes upward. As will be described later, a water supply duct 19 is connected to the left connection port 16, an air supply duct 20 is connected to the central connection port 17, and an exhaust duct 21 is connected to the right connection port 18. It has become.

  As shown in FIG. 1, a synthetic resin top cover 22 having a thin hollow box shape is mounted on the outer box 2. Although not shown, a substantially circular laundry entrance is formed at the center of the top surface of the top cover 22 above the opening 14a of the water tank cover 14, and the laundry entrance is opened and closed. A bi-fold type lid is provided. Although not shown in detail, an operation panel 23 (shown only in FIG. 4) is provided at the front portion of the top cover 22.

  Although not shown in detail, the operation panel 23 includes various operation switches including a start switch and a course selection key, and a display unit that performs necessary display such as course display and remaining time. The user can instruct selection of a course for washing operation or start of operation by operating the operation switch of the operation panel 23. A control device 24 (shown only in FIG. 4) is provided on the back side of the operation panel 23. The control device 24 is configured mainly with a computer and controls the washing machine 1 as a whole.

  As shown in FIG. 1, a machine room is provided at the rear side of the top cover 22, and a water supply unit 25 is provided in the machine room on the left side in the figure. In position, a drying unit 26 as a heat exchanger is provided. Among them, the water supply unit 25 is for supplying water from a water supply source (for example, water supply) into the water tank 3, and as shown in FIG. 3, an electronically controlled water supply valve 27, a connecting pipe 28, a water injection case 29, the water supply duct 19 and the like.

  Connected to the connection pipe 28 is a tip end of a connection hose connected to a water tap (not shown). Although not shown, a storage case for storing a detergent and a washing aid is provided in the water injection case 29 so as to be able to be taken in and out. The water supply duct 19 is provided so as to extend downward from the water injection case 29. The water supply duct 19 is configured in a bellows shape from a flexible material such as rubber, for example, and the distal end portion is connected to the connection port 16.

  At this time, although not shown in detail, the water supply valve 27 has two outlets and can be switched to three positions: a closed state, a state where the first outlet is opened, and a state where the second outlet is opened. It consists of a simple switching valve. An inlet portion of the water supply valve 27 is connected to the connection pipe 28, and the first outlet is connected to the water injection case 29. Further, the second outlet is connected to a water-cooled dehumidifier described later via a water injection hose 30.

  Thus, when the water supply valve 27 of the water supply unit 25 is switched to the open state of the first outlet, water from the water supply source is supplied to the water injection case 29. The water supplied to the water injection case 29 is supplied into the water tank 3 through the water supply duct 19 after dissolving the detergent or the like in the housing case. Further, when the water supply valve 27 is switched to the open state of the second outlet, water from the water supply source is supplied to the water-cooled dehumidifier.

  Now, the drying unit 26 will be described with reference to FIGS. The drying unit 26 functions as a heat exchanger that circulates and supplies the hot air dehumidified into the water tank 3 during the drying operation. In the present embodiment, the drying unit 26 integrally includes a heater unit 31 that extends in the left-right direction in the machine room and a water-cooled dehumidifier 32 that is a dehumidifying means that extends downward from the right end of the heater unit 31. And fixedly attached to the inner surface of the outer box 2 (and the top cover 22).

  As will be described in detail below, in the drying unit 26, the air in the water tank 3 passes through the exhaust duct 21 as shown by arrows A to F by driving a blower fan 33 that circulates air. It is sucked into the dehumidifier 32 and is water-cooled and dehumidified in the water-cooled dehumidifier 32. The dehumidified air is heated by passing through the heater unit 31 and then circulated back from the air supply duct 20 into the water tank 3.

  The heater unit 31 is configured by incorporating the blower fan 33 and a heater 35 as heating means in a heater case 34 that forms an air passage extending in the left-right direction in the drawing. The heater 35 is formed of, for example, a PTC heater, and is disposed at a substantially central portion in the heater case 34. A discharge port 34a for discharging warm air is provided on the lower surface side of the left end portion in the figure of the heater case 34, and the upper end portion of the air supply duct 20 is connected to the discharge port 34a.

  The air supply duct 20 is formed in a bellows shape from a material having flexibility (softness) such as rubber, and the tip (lower end) thereof is connected to the connection port 17. Thus, the air supply duct 20 is provided so as to connect the drying unit 26 (heater case 34) and the water tank 3 in the vertical direction. As shown in FIG. 2, a temperature sensor 36 for detecting the temperature of the hot air supplied into the water tank 3 is provided in the vicinity of the discharge port 34 a in the heater case 34.

  And the right end side of the said heater case 34 becomes a fan casing which has the ventilation hole 37 in the lower surface side, and the said ventilation fan 33 is provided in this fan casing part. The blower fan 33 includes a fan motor 33a attached to the upper surface portion of the heater case 34 downward, and a blower blade 34b including a centrifugal fan disposed in the fan casing. Thus, when the blower fan 33 is driven, air is sucked from the vent 37 and blown in the outer peripheral direction (left heater 35 side in the figure).

  The water-cooled dehumidifier 32 has a dehumidifying case 38 connected to the lower surface of the right end portion of the heater case 34. The dehumidifying case 38 has a base portion 38a disposed on the lower side of the heater case 34 and a hanging portion 38b extending long downward from the right side of the base portion 38a. The upper surface of the base 38 a is continuous with the vent 37. As shown in FIGS. 1 and 2, in the dehumidifying case 38, there is a partition wall 39 for partitioning the base portion 38a up and down and partitioning the hanging portion 38b to the left and right except for the lower end portion. Is provided.

  Thereby, as shown in FIG. 2, the inside of the base portion 38 a is partitioned into an upper space and a lower space by the partition wall 39. In the hanging part 38 b, a partition wall 39 folds the first air path 40 extending downward on the left side in the drawing of the hanging part 38 b and the lower end part of the first air path 40. A second air passage 41 extending upward on the right side in the figure in 38b is formed. A lower space of the base portion 38a communicates with the first air passage 40, a lower end of the first air passage 40 communicates with a lower end of the second air passage 41, and an upper end portion of the second air passage 41 has an upper end of the base portion 38a. It communicates with the upper space and the vent 37. Although not shown, a plurality of ribs extending in the left-right direction are provided in the second air passage 41, and the inside has a so-called labyrinth structure.

  As shown in FIG. 1, a suction port 38c for sucking air is provided on the lower surface of the base 38a of the dehumidifying case 38, and the upper end of the exhaust duct 19 is connected to the suction port 38c. ing. The exhaust air supply duct 19 is also formed in a bellows shape from a material having flexibility (softness) such as rubber, and the tip (lower end) thereof is connected to the connection port 18. Thus, the exhaust duct 19 is provided so as to connect the drying unit 26 (dehumidification case 38) and the water tank 3 in the vertical direction. Further, as shown in FIG. 2, a lint filter 42 for capturing lint is provided in the lower space of the base 38a.

  The dehumidifying case 38 is provided with a water injection port 43 located at the upper end of the second air passage 41, and the water injection hose 30 is connected to the tip of the water injection hose 30. Thereby, in the drying operation, the water supply valve 27 is switched to the open state of the second outlet, and water from the water supply source is sprayed from the water injection port 43 into the second air passage 41 through the water injection hose 30. ing. By this watering, the intake air flowing through the second air passage 41, that is, high-temperature and high-humidity air is cooled (heat exchange), and the air is dehumidified and cooled.

  On the other hand, a dehumidifying drain 44 for discharging water (dehumidified water) is provided at the lower end of the hanging portion 38b of the dehumidifying case 38. As shown in FIG. 2, the dehumidifying drain 44 is connected to a proximal end portion of a dehumidifying drain 45 serving as a dehumidifying drain. The distal end portion of the dehumidifying drain pipe 45 is connected to the downstream side of the drain valve 12 of the drain pipe 13. Thus, the water in the hanging portion 38 b of the dehumidifying case 38 flows from the dehumidifying drain port 44 to the dehumidifying drain pipe 45 and is discharged through the drain pipe 13.

  A midway portion of the dehumidifying drain pipe 45 and the upper portion of the water tank 3 are connected by a flexible connection hose 46. Although not shown in detail, the inner surface of the outer box 2 is provided with a plurality of attachment portions 2a for fixing the drying unit 26 (only one is shown in FIG. 2). 34 and the dehumidifying case 38 are fixedly attached to these attachment portions 2a by, for example, screwing or the like. In this case, a part of the heater case 34 and the dehumidifying case 38 is supported (attached) to the top cover 22.

  FIG. 4 schematically shows an electrical configuration of the washing machine 1 configured as described above. The control device 24 that controls the entire washing machine 1 receives an operation signal from the operation panel 23, a water level sensor 47 that detects the water level in the water tank 3, and a rotation that detects the rotation speed of the drive motor 9. Signals from the sensor 48 and the temperature sensor 36 are input. Then, the control device 24 controls the water supply valve 27, the drain valve 12, the drive motor 9 and the like through the drive circuit 49 based on those input signals and the control program, and from the process of washing, rinsing and dehydration. Perform a washing operation. Further, the control device 24 controls the blower fan 334, the heater 35, the drive motor 9 and the like via the drive circuit 49, and executes a drying operation.

  Next, the operation and effect of the washing machine 1 having the above configuration will be described. In the washing machine 1, a washing operation and a subsequent drying operation are executed based on a user operation. When the drying operation is started, the blower fan 33 and the heater 35 are driven, and the water supply valve 27 is switched to the open state of the second outlet. Also in this drying operation, the drive motor 9 is driven for a short time, the rotating tub 5 or the stirring body 8 is rotated, and the loosening operation of the laundry is performed.

  As shown in FIG. 2, in the drying operation, the air in the water tank 3 is first driven through the exhaust duct 21 by the drive of the blower fan 33 of the drying unit 26, as shown by the arrow A, and the suction port of the water-cooled dehumidifier 32. From 38c, it is sucked into the lower space of the base 38a. As this air passes through the lint filter 42, lint and the like are captured. The air that has passed through the lint filter 42 flows downward through the first air passage 40 as indicated by an arrow B, and further turns upward as the second air passage 41 is turned up as indicated by an arrow C. Flowing.

  The air flowing upward in the second air passage 41 is cooled (heat exchanged) by water injected from above, and dehumidified and cooled. As shown by an arrow D, the dehumidified air passes through the vent 37 from the upper space of the base portion 38a and is sucked into the blower fan 33 portion of the heater unit 31. The air passing through the blower fan 33 flows through the heater case 34 as indicated by the arrow E and is heated by the heater 35. As shown by the arrow F, the heated air passes through the air supply duct 20 from the discharge port 24 a and is supplied into the water tank 3. At this time, the temperature sensor 36 detects the temperature of the heated air.

  Due to the circulation of the drying air, the laundry stored in the rotary tub 5 is effectively dried. The water supplied to the second air passage 41 and the water generated by heat exchange (condensation) with the air are drained from the dehumidifying drain 44 through the dehumidifying drain 45 to the outside through the drain 13. The Thereby, drainage from the water-cooled dehumidifier 32 can be reliably performed by natural drainage, and a simple and inexpensive configuration can be achieved.

  Here, in this type of vertical washing machine 1, since the water tub 3 is elastically supported (suspended) in the outer case 2 by the elastic suspension mechanism 4, the agitator 8 is provided. There is a problem of the vibration of the water tank 3 at the time of rotating the rotating tank 5 and the noise accompanying the vibration. In particular, in a case where a heat exchanger for drying operation is provided, the duct connected to the water tank 3 may affect the vibration system, and vibration and noise may increase. In addition, by providing the heat exchanger, the weight balance of the water tank 3 may be lost, and vibration and noise may increase due to the load.

  However, in this embodiment, since the exhaust duct 21 and the air supply duct 20 provided in the drying unit 26 are both connected to the upper part of the water tank 3 (water tank cover 14), the ducts 21 and 20 are vibrations of the water tank 3. It is possible to suppress adverse effects on the system and make it difficult to cause abnormal vibration of the water tank 3 and noise accompanying it. In this case, particularly in the present embodiment, the exhaust duct 21 and the air supply duct 20 are configured in a bellows shape, and the drying unit 26 and the water tank 3 are connected in the vertical direction. The vibration can be absorbed by the bellows-like portions of the ducts 21 and 20, and the vibration of the water tank 3 can be prevented from being transmitted to the drying unit 26 and thus to the outer box 2.

  Moreover, in this embodiment, unlike what provided the heat exchanger in the outer wall part of the water tank, the said drying unit 26 is attached to the outer box 2 (and top cover 22) instead of the water tank 3 with the united form. Therefore, the weight balance of the water tank 3 is not lost, and it is possible to prevent the vibration and noise from increasing due to the uneven weight balance of the water tank 3. Of course, the dehumidifying drain pipe 45 and the like do not adversely affect the vibration system of the water tank 3. Furthermore, since the heat exchanger is unitized as the drying unit 26 and the connection structure of the air passages such as the ducts 20 and 21 is concentrated on the upper part of the water tank 3, the assemblability is also improved.

  As described above, according to the present embodiment, the drying unit 26 having the drying function of circulating and supplying the drying air into the water tank 3 is configured by unitizing the heater unit 31 and the water-cooled dehumidifier 32. Since the exhaust duct 21 and the air supply duct 20 that are fixedly attached to the outer box 2 and connect the drying unit 26 and the water tank 3 are both connected to the upper part of the water tank 3, the abnormal vibration of the water tank 3 is prevented. Generation | occurrence | production etc. can be suppressed and the outstanding effect that a motion and noise can be reduced can be acquired.

  In the above-described embodiment, the water-cooled dehumidifier 32 is adopted as the dehumidifying means constituting the heat exchanger. However, other than that, a heat pump (refrigeration cycle) type dehumidifier or heat is generated by blowing air. You may make it employ | adopt the air-cooling dehumidification apparatus which cools an exchanger, the Peltier cooling dehumidification apparatus which cools a heat exchanger with a Peltier unit, etc. Moreover, you may make it attach a heat exchanger to a top cover. That is, the “outer box” of the washing machine constitutes an outer shell (housing) of the washing machine, and is a concept that includes not only the outer box 2 of the embodiment but also the top cover 22. In addition, the detailed structure of the entire washing machine and the heater unit can be variously modified, and the present invention is not limited to the above-described embodiment, and can be implemented with appropriate modifications within the scope not departing from the gist.

  In the drawings, 1 is a washing machine, 2 is an outer box, 3 is a water tank, 4 is an elastic suspension mechanism, 5 is a rotating tank, 8 is a stirring body, 12 is a drain valve, 13 is a drain pipe (drainage channel), 14 is Water tank cover, 17 and 18 are connection ports, 20 is an air supply duct, 21 is an exhaust duct, 24 is a control device, 26 is a drying unit (heat exchanger), 31 is a heater unit, 32 is a water-cooled dehumidifier, and 33 is Blower fan, 34 is a heater case, 35 is a heater, 38 is a dehumidifying case, 40 is a first air path, 41 is a second air path, 43 is a water inlet, 44 is a dehumidifying drain, and 45 is a dehumidifying drain ( Dehumidification drainage channel).

Claims (3)

An outer box,
A water tank elastically supported in the outer box;
A rotating tub placed in this water tub and containing laundry;
An agitator disposed on the inner bottom of the rotating tank;
A heat exchanger that is provided in the outer box and generates drying air for drying the laundry;
An exhaust duct for sucking air in the water tank into the heat exchanger;
An air supply duct for circulatingly supplying dry air generated by the heat exchanger into the water tank,
In the case where the heat exchanger is unitized in a case constituting a wind path, a dehumidifying means for dehumidifying the sucked air, a blower fan for circulating the air, and a heating means for heating the dehumidified air are assembled. Attached to the outer box and provided
The exhaust duct and the air supply duct connecting the heat exchanger and the water tank are both connected to the upper part of the water tank.   The heat exchanger is connected to a base end portion of a dehumidifying drain hose for draining from the dehumidifying means, and a leading end portion of the dehumidifying drain hose is drained from the water tank in the outer box. The washing machine according to claim 1, wherein the washing machine is connected to a downstream side of a drainage valve in a drainage channel for performing the operation. The exhaust duct and the air supply duct are configured to have a bellows-like portion at least in part,
The washing machine according to claim 1 or 2, wherein both are provided so as to connect the heat exchanger and the water tank vertically.

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