JP2005058658A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing machine with high hot air blowing capacity, capable of preventing a heat source for producing hot air from being soaked in water. <P>SOLUTION: A fan 40 and a PTC heater 42 are stored in a fan casing 27. Outside air is sucked from an intake of a back cover through an inlet port 32 of the fan casing 27 when the fan 40 is rotated, and after heated by the PTC heater 42, the air is released into a washing tub. In this case, the inlet port 32 and the intake are disposed opposite from each other in the front/rear direction. Accordingly, as the pressure loss is reduced on the intake side of the fan 40, the quantity of hot air blown to the washing tub is increased. Moreover, as a water reservoir 51 is formed inside a whirlpool chamber 30 of the fan casing 27 and the PTC heater 42 is disposed higher than the maximum level of reserved water in the water reservoir 51, the PTC heater 42 is prevented from being soaked in water. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a washing machine having a drying function for forcibly sending warm air into a washing tub as drying air for laundry.

Some of the washing machines have a configuration in which a fan and a heater are arranged in a fan casing, and warm air is heated based on supplying outside air from the intake of the outer box to the heater through the inlet of the fan casing. In the case of this structure, since the ventilation path from the intake port to the intake port is bent, there is a problem that the pressure loss is large on the upstream side of the fan, and the amount of warm air blown to the washing tub is low.
JP 2000-271376 A

In the washing machine, it is considered to reduce the pressure loss and to increase the amount of warm air blown to the washing tub by disposing the intake port of the outside air and the intake port of the fan casing in the front-rear direction. In the case of this configuration, there is a high probability that water droplets such as rain will enter the fan casing from the intake port through the intake port, so that water may accumulate in the fan casing and the heater may be immersed in water.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a washing machine that has a high air blowing capability and can prevent a hot air generating heat source from being immersed in water. .

<About the Invention of Claim 1>
The invention according to claim 1 increases the amount of warm air blown to the washing tub by straightening the air flow path from the outside air intake port to the air intake port of the fan casing, and reduces water intrusion into the fan casing. By storing in a place, the heat source in the high place is prevented from being immersed in water. Hereinafter, the meanings of the main terms described in claim 1 will be described.
1) Top cover: A frame that is provided separately or integrally at the upper end of the outer box, and has a slot for loading laundry into the washing tub and a lid for opening and closing the slot.
2) Machine room: Refers to a space in which components such as a water supply valve are stored. This machine room is provided at the rear end portion of the top cover, and the rear end portion of the top cover refers to a region of the top cover that is behind the inlet.
3) Intake port: Refers to the most upstream opening for taking outside air into the machine as dry air. This intake port is provided in the rear wall of the machine room, and the rear wall of the machine room refers to a partition plate that divides the machine room from the outside.
4) Fan casing: It has a spiral chamber and a duct, and the spiral chamber refers to a fan storage chamber that boosts the outside air mainly by the action of centrifugal force. The spiral chamber has an axis oriented in the front-rear direction, and the fan is housed in the spiral chamber so that the rotation axis is directed in the front-rear direction. The spiral chamber is provided with an air inlet. The intake port is disposed in front of the intake port, and reduces pressure loss by forming a linear intake path extending in the front-rear direction on the upstream side of the fan.
The duct functions as a blowing path through which the wind discharged from the fan in the spiral chamber passes, and it is a requirement that the duct has a blowing path extending in the left-right direction. The duct is provided with an exhaust port, and the air discharged from the fan is discharged into the washing tub through the exhaust port of the duct. This duct is disposed higher than the horizontal line passing through the lowest point on the inner circumferential surface of the spiral chamber, and a water storage portion located lower than the bottom surface in the duct is formed in the spiral chamber. Accordingly, when water droplets such as rain enter the spiral chamber from the intake port through the intake port, the water is limitedly stored in the water storage unit, and when the stored water level of the water storage unit reaches the intake port, the stored water spills from the intake port. That is, in the water storage section, the maximum water level that can be stored is defined by a horizontal line that passes through the lowest point on the inner peripheral surface of the intake port.
5) Heat source: Refers to an electrical heating element housed in the duct of the fan casing. This heat source heats the air discharged from the fan, and hot air having a relatively higher temperature than the outside air is forcibly injected as dry air into the washing tub. This heat source is arranged at a higher position than the horizontal line passing through the lowest point on the inner peripheral surface of the intake port, and the horizontal line corresponds to the highest water level of the reservoir. That is, the heat source is prevented from being immersed by being arranged at a higher position than the highest water level.
<About the invention according to claim 2>
The invention according to claim 2 suppresses the probability that water drops such as rain enter the outside air intake. Specifically, the intake port is composed of a plurality of slits, a ridge is provided above each slit, and the left and right ends of the ridge protrude from the left and right ends of the slit immediately below.
<About the invention according to claim 3>
The invention according to claim 3 uses a PTC heater as a heat source, and uses heat dissipation fins of the PTC heater as a wind direction plate. Specifically, the heat dissipating fins are arranged so as to intersect the flow direction of the air discharged from the fan, and the air flow from the fan is applied to the heat dissipating fins to change the flow direction of the discharge air toward the exhaust port.
<About the invention according to claim 4>
The invention according to claim 4 refers to the arrangement angle of the radiating fins for the purpose of optimizing both the contact time between the discharge air from the fan and the radiating fin and the distribution resistance of the radiating air. The fins are arranged to intersect at an angle of “θ ° / 2” with respect to the flow direction of the discharge air. This angle θ ° is the bending angle of the duct, and the collision angle of the discharge air against the radiating fin is “θ ° / 2”.

According to the first aspect of the present invention, the air intake port of the fan casing and the outside air intake port are arranged to face each other in the front-rear direction. For this reason, since pressure loss is reduced on the upstream side of the fan, the amount of warm air blown to the washing tub increases. In addition, since the water storage section is formed in the spiral chamber and the heat source is disposed at a higher position than the maximum storage water level of the water storage section, the heat source can be prevented from being immersed in water.
According to the second aspect of the present invention, since the eaves are provided above the slit and the left and right ends of the eave are protruded from the left and right ends of the slit, it is difficult for water droplets such as rain to enter the fan casing through the slit. .
According to the invention of claim 3, the flow direction of the discharge air is changed to the exhaust port side by applying the discharge air from the fan to the radiating fin of the PTC heater. For this reason, since the flow of the discharge air is improved, the amount of warm air blown to the washing tub is increased. In addition, since a dedicated wind direction plate that changes the flow direction of the discharge air is not required, the mechanical configuration is simplified.
According to the fourth aspect of the invention, since the collision angle of the discharge air with respect to the radiating fin is set to “½” of the bending angle of the air blowing path, the contact time between the discharge air and the radiating fin and the flow resistance of the discharge air Both are appropriate. For this reason, since a discharge wind can be flowed smoothly, heating efficiently, a drying capability improves.

  The outside air intake port and the air intake port of the fan casing are arranged to face each other, and the air intake path from the intake port to the air intake port is linearized to increase the amount of dry air blown. Moreover, a water storage part is provided in the swirl chamber of the fan casing, and the maximum water level of the water storage part is regulated by the intake port. And a heat source is arrange | positioned in the high place from the highest water level of a water storage part, and it prevents that a heat source is immersed in water. A specific example of this embodiment will be described with reference to the drawings.

  As shown in FIG. 5, the outer box 1 has a rectangular box shape with an upper surface opened, and a top cover 2 is fixed to an upper end portion of the outer box 1. The top cover 2 has a rectangular frame shape that goes around the upper end of the outer box 1, and a cylindrical insertion port 3 that protrudes downward is formed at the center of the top cover 2. An outer lid 4 is attached to the top cover 2, and the insertion port 3 is opened and closed based on the operation of the outer lid 4.

  A machine room 5 is formed in the top cover 2 at the rear end. The machine room 5 refers to a horizontally long space having an upper surface and a rear surface opened. A back cover 6 that covers the upper surface and the rear surface of the machine room 5 is fixed to the top cover 2. A water supply valve (not shown) is accommodated in the machine room 5, and a water supply hose 7 is connected to the inlet of the water supply valve as shown in FIG. This water supply hose 7 is connected to a water tap, and when the water supply valve is opened, tap water is supplied from the water tap through the water supply hose 7 to the water supply valve and discharged from the outlet of the water supply valve.

  As shown in FIG. 5, a plurality of rods 8 are fixed inside the outer box 1, and damper springs 9 are inserted into the outer periphery of each rod 8. A water receiving tank 10 is slidably mounted on the outer periphery of these rods 8, and the water receiving tank 10 is elastically supported by a plurality of damper springs 9. The water receiving tank 10 functions as a storage container that receives tap water discharged from the water supply valve, and a drain pipe 11 is connected to the bottom plate of the water receiving tank 10. A drain valve 12 is interposed in the drain pipe 11, and the drain pipe 11 is opened and closed based on switching of the state of the drain valve 12. The drain valve 12 is driven by a geared motor (not shown) incorporating a gear mechanism, and the tap water in the water receiving tank 10 passes through the drain pipe 11 based on the fact that the drain pipe 11 is opened. Is discharged.

  A water receiving tank cover 13 is fixed to the upper end of the water receiving tank 10, and a cylindrical inlet 14 is formed at the center of the water receiving tank cover 13. The inlet 14 is disposed below the inlet 3 of the top cover 2, and the water receiving tank cover 13 is formed with a cylindrical air inlet 15 located behind the inlet 14. The water receiving tank cover 13 is provided with an inner lid 16, and the inlet 14 of the water receiving tank cover 13 is opened and closed based on the operation of the inner lid 16.

  A washing motor 17 corresponding to a drive source is fixed to the bottom plate of the water receiving tank 10, and a stirring shaft 18 is directly connected to a rotating shaft of the washing motor 17. A cylindrical tank shaft 19 is inserted on the outer peripheral surface of the stirring shaft 18, and a rotating tank 20 is fixed to the tank shaft 19 in the water receiving tank 10. The rotating tub 20 functions as a washing tub in which the laundry is introduced from the insertion port 3 of the top cover 2 through the insertion port 14 of the water receiving tank cover 13 and a dehydration tub in which water is discharged from the laundry by centrifugal force. A plurality of through holes 21 are formed in the peripheral wall of the rotating tub 20. A pulsator 22 is fixed to the stirring shaft 18 in the rotary tank 20. The pulsator 22 generates a water flow based on rotation with respect to the rotating tub 20, and the laundry in the rotating tub 20 is washed by the water flow generated by the pulsator 22.

  A clutch (not shown) is interposed between the stirring shaft 18 and the tank shaft 19. This clutch is switched between a dewatering state in which the tank shaft 19 is connected to the stirring shaft 18 and a washing state in which the tank shaft 19 is disconnected from the stirring shaft 18. When the washing motor 17 is driven in the dewatering state of the clutch, the rotating tank 20 When the pulsator 22 rotates integrally and the washing motor 17 is driven in the clutch washing state, the pulsator 22 relatively rotates in the stationary state of the rotary tub 20. The clutch shares a drive source with the drain valve 12. When the drain valve 12 is closed, the clutch is linked to the drain valve 12, and when the drain valve 12 is open, the clutch is connected to the drain valve 12. It becomes dehydrated in conjunction.

  The rear plate of the back cover 6 functions as a rear wall of the machine room 5. As shown in FIG. 7, the rear plate of the back cover 6 is formed with an intake port 23 located at the left end portion. Yes. The intake port 23 refers to an assembly of slits 24 arranged in a plurality of stages and a plurality of rows, and a plurality of flanges 25 are formed on the rear plate of the back cover 6. Each of the flanges 25 extends along the upper side of the plurality of slits 24 arranged in a horizontal row, and has an inclined plate shape that descends from the front toward the rear. Each of these ridges 25 prevents water drops falling along the rear surface of the back cover 6 from entering the slit 24. The lateral width W1 of each ridge 25 is the lateral dimension of the slit 24 in the lateral direction. It is set larger than W2. That is, the relative size relationship between the width dimension W1 and the width dimension W2 is such that both the left and right end portions of the flange 25 protrude from the left and right end portions of the slit 24.

  As shown in FIG. 5, a drying unit 26 is housed in the machine room 5 in front of the air inlet 23. The drying unit 26 promotes drying of the laundry in the rotating tub 20 based on forcibly sending warm air into the rotating tub 20, and a centrifugal fan device that blows outside air into the rotating tub 20. The heat source for heating the wind from the fan device is mechanically integrated. Hereinafter, the detailed configuration of the drying unit 26 will be described.

  As shown in FIG. 6, a fan casing 27 is accommodated in the machine room 5 at the left end. As shown in FIGS. 2 and 3, the fan casing 27 is configured on the basis of joining the front case 28 and the rear case 29 in an airtight state, and is shown in FIGS. As shown in FIG. 2, the spiral chamber 30 and the duct 31 are provided. The spiral chamber 30 refers to a circular portion located in the left half of the fan casing 27, and an air inlet 32 is formed in the rear plate of the spiral chamber 30 as shown in FIG. The intake port 32 has a circular hole shape and is disposed in front of the intake port 23 as shown in FIG.

  As shown in FIG. 1B, the duct 31 refers to a passage portion located in the right half of the fan casing 27, and the first air passage 33 and the first air passage 33 extending in the left-right direction. The second air passage 34 intersects at right angles to the second air passage 34. As shown in FIG. 1A, the duct 31 is disposed at a higher position than the horizontal line HL <b> 1 passing through the lowest point on the inner peripheral surface of the spiral chamber 30. A cylindrical exhaust port 35 is formed in the second air passage 34. The exhaust port 35 is connected to the upper end portion of a straight bellows hose 36, and the lower end portion of the bellows hose 36 is connected to the air inlet 15 of the water receiving tank cover 13 as shown in FIG. Yes. Moreover, in the fan casing 27, as shown to (a) of FIG. 1, the inclined surface 37 is formed in the bottom part of the 1st ventilation path 33. As shown in FIG. The inclined surface 37 extends over both the front casing 28 and the rear casing 29, and has a planar shape that rises as it moves away from the spiral chamber 30 to the right.

  As shown in FIG. 1B, a fan motor 38 made of a capacitor induction motor is fixed to the front plate of the front case 28, and the rotating shaft 39 of the fan motor 38 is in the spiral chamber 30 of the fan casing 27. Protruding. A centrifugal fan 40 is directly connected to the rotating shaft 39 in the spiral chamber 30. When the fan motor 38 is driven, the fan 40 draws outside air from the intake port 23 of the back cover 6 to the intake port 32 of the fan casing 27. Then, the air is sucked into the spiral chamber 30 and sent from the duct 31 into the rotary tank 20 through the exhaust port 35, the bellows hose 36, and the air supply port 15. That is, the duct 31 has a second air passage after the discharge air from the fan 40 flows to the right along the first air passage 33 as indicated by arrows in FIGS. It is supplied into the rotary tank 20 by flowing forward along the line 34, and corresponds to a bending path for bending the air discharged from the fan 40 at an angle of “90 °”.

  In the fan casing 27, as shown in FIG. 1A, a square-tube heater frame 41 is accommodated. As shown in FIG. 1B, the heater frame 41 is disposed in the first air passage 33 of the duct 31, and a PTC heater 42 corresponding to a heat source is held in the heater frame 41. Has been. As shown in FIG. 4B, the PTC heater 42 mechanically includes a plurality of PTC elements 43, a plurality of heat radiation fins 44, a plurality of conductive plates 45, a plurality of power terminals 46, and a plurality of power lines 47. And is warmed based on heating the air discharged from the fan 40. Hereinafter, the PTC heater 42 will be described.

  The PTC heater 42 has a PTC element group 48 arranged in two upper and lower stages. Each PTC element group 48 is formed by arranging a plurality of PTC elements 43 in a rectangular shape, and meandering heat radiation fins 44 that also serve as electrode plates are connected to the upper and lower electrode surfaces of each PTC element group 48. . As shown in FIG. 4C, the plurality of straight plate portions 49 of each of the radiating fins 44 are arranged at right angles to the longitudinal direction of the PTC element group 48, and between the adjacent straight plate portions 49, A gap-like air passage 50 orthogonal to the longitudinal direction of the element group 48 is formed. As shown in FIG. 4B, a conductive plate 45 is connected to each radiating fin 44, and a power terminal 46 is welded to each conductive plate 45. A power line 47 is connected to each of the power terminals 46, and driving power is applied to each PTC element 43 through the power line 47.

  A reference CL in FIG. 1B indicates a center line of the PTC heater 42 in the short direction. 1B indicates a straight line parallel to the first air passage 33 of the fan casing 27, and indicates the flow direction of the wind discharged from the fan 40. The intersection angle θ between the flow line BL and the center line CL is set to “45 °”, and the PTC heater 42 is arranged to intersect with the air blowing path of the wind discharged from the fan 40 at an angle of 45 °. Yes. That is, the PTC heater 42 is inclined and arranged at an angle “45 °” that is “½” of the bending angle “90 °” of the duct 31, and each straight plate portion 49 and each ventilation path 50 of the radiating fin 44 are The duct 31 is arranged to intersect at an angle “45 °” of “½” of the bending angle “90 °” of the duct 31 with respect to the flow direction of the discharge wind, and the wind collision angle and the approach angle are set to “45 °”. ing. Therefore, when the air discharged from the fan 40 enters the ventilation path 50, the linear traveling speed becomes slow, and the time for heating by the PTC heater 42 becomes long.

  When water droplets such as rain enter the spiral chamber 31 from the intake port 23 of the back cover 6 through the intake port 32 of the casing 27, water accumulates in the spiral chamber 31. A symbol HL <b> 2 in FIG. 1A is a straight line indicating the highest water level that can be stored in the spiral chamber 30. The straight line HL2 is a horizontal line passing through the lowest point on the inner peripheral surface of the air inlet 32, and the reference numeral 51 in FIG. 1A indicates the water storage portion defined by the horizontal line HL2 and the horizontal line HL1 in the spiral chamber 30. ing. All of the heater frame 41 and all of the PTC heaters 42 are disposed higher than the maximum water level HL2, and the heater frame 41 and the PTC heater 42 are prevented from being immersed in water by the mechanical layout with respect to the maximum water level HL2. ing. 1 is a horizontal line passing through the axis of the fan 40, and all of the heater frame 41 and all of the PTC heaters 42 are arranged higher than the horizontal line HL3.

  A temperature control duct 52 is formed in the heater frame 41 as shown in FIG. 4A, and each power supply terminal 46 is placed in the temperature control duct 52 as shown in FIG. It is stored. The temperature control duct 52 is provided in a non-housing portion of the PTC heater 42 in the heater frame 41, and a part of the air discharged from the fan 40 passes through the temperature control duct 52 to generate a second air flow. The hot air that has entered the passage 34 and has passed through the PTC heater 42 is mixed in the second air passage 34. That is, the temperature control duct 52 supplies the outside air into the second air passage 34 in an unheated state, and optimizes the temperature of the drying air based on lowering the temperature of the hot air generated by the PTC heater 42. .

  As shown in FIG. 4A, the heater frame 41 is formed with a plurality of rib plates 53 located in the temperature control duct 52. These rib plates 53 increase the strength of the temperature control duct 52 and are arranged in a horizontal direction parallel to the flow direction of the wind discharged from the fan 40. Further, as shown in FIGS. 1A and 1B, an electrical component box 54 is fixed to the right end portion of the fan casing 27, and a capacitor for starting the fan motor 38 is placed in the electrical component box 54. Etc. are housed. The drying unit 26 is configured as described above.

  As shown in FIG. 5, a filter frame 55 is detachably inserted into the back cover 6 from above, and the filter frame 55 is connected to the intake port 23 of the back cover 6 and the intake port 32 of the fan casing 27. A filter 56 is fixed in between. The filter 56 removes foreign matter such as dust from the outside air, and clean dry air from which dust or the like has been removed is supplied to the laundry.

  The inner lid 16 is formed with a through-hole-shaped vent 57, and the drying air blown into the rotary tank 20 is discharged from the rotary tank 20 through the vent 57. A filter 58 is fixed to the vent 57, and foreign matter such as lint contained in the discharge air is captured by the filter 58. The outer lid 4 is formed with a vent (not shown). This vent is composed of a plurality of through holes, and the dry air discharged from the vent 57 of the inner lid 16 is discharged outside the machine through the vent of the outer lid 4.

  As shown in FIG. 9, an operation panel 59 is fixed to the top cover 2 in front of the outer lid 4, and a plurality of operation switches 60 are attached to the operation panel 59. As shown in FIG. 5, a control board box 61 is fixed to the lower surface of the operation panel 59, and a control device 62 is accommodated in the control board box 61. The control device 62 is mainly composed of a microcomputer, and controls driving of a water supply valve drive source, a geared motor, a washing motor 17, a fan motor 38, and a PTC element 43 in accordance with the operation contents of a plurality of operation switches 60. To perform fully automatic operation. This fully automatic operation is a washing process in which the pulsator 22 is rotated independently in the state of storing tap water, a shower rinsing process in which the rotating tank 20 and the pulsator 22 are rotated synchronously in the state of injecting tap water, and the pulsator 22 is independently stored in the state of storing tap water. A rotating and rinsing step, a rotating step 20 and a pulsator 22 are synchronously rotated in a state where injection of tap water is stopped, and a drying step in which the PTC element 43 is driven in a driving state of the fan motor 38. This is performed as a final step after the dehydration step.

According to the said Example, there exist the following effects.
The intake port 32 of the fan casing 27 and the intake port 23 of the back cover 6 are disposed opposite to each other in the front-rear direction. For this reason, since the pressure loss is reduced on the suction side of the fan 40, the amount of warm air blown to the rotating tub 20 increases. Moreover, since the water storage part 51 is formed in the spiral chamber 30 and the PTC heater 42 is disposed at a position higher than the maximum storage water level HL2 of the water storage part 51, the PTC heater 42 can be prevented from being immersed in water.

Since the flange 25 is provided above the slit 24 and the left and right ends of the flange 25 are protruded from the left and right ends of the slit 24 immediately below, it is difficult for water droplets such as rain to enter the fan casing 27 through the slit 24.
The flow direction of the discharge air was changed to the exhaust port 35 side by applying the discharge air from the fan 40 to the radiating fins 44 of the PTC heater 42. For this reason, since the flow of the discharge air is improved, the amount of warm air blown to the rotating tub 20 is increased. In addition, since a dedicated wind direction plate that changes the flow direction of the discharge air is not required, the mechanical configuration is simplified.

The collision angle θ of the wind discharged from the fan 40 with respect to the heat radiation fin 44 is set to “45 °” of “1/2” of the bending angle “90 °” of the duct 31, so that the discharge air is in contact with the heat radiation fin 44. Both time and flow resistance of the discharge wind are optimized. For this reason, since the discharge wind can be smoothly flowed while being efficiently heated, the drying ability of the laundry is improved.
Since the inclined surface 37 is formed in the duct 31 of the fan casing 27, when water is scattered in the duct 31 by the blowing force of the fan 40, it falls into the spiral chamber 30 along the inclined surface 37. For this reason, since water does not accumulate in the duct 31 due to the blowing force of the fan 40, the PTC heater 42 is prevented from being immersed also in this respect.

The figure which shows one Example of this invention (a is a rear view which shows the internal structure of a drying unit, b is sectional drawing which follows an X-ray) Perspective view showing the appearance of the drying unit A perspective view showing the appearance of the drying unit in an exploded state of the fan casing (A) is a perspective view showing the appearance of the heater case, (b) is a perspective view showing the appearance of the PTC heater, and (c) is a diagram showing the arrangement relationship between the radiation fins and the PTC elements. Sectional drawing which shows the internal structure of a washing machine A perspective view showing the appearance of the washing machine in a broken state of the back cover A perspective view showing an intake port of the back cover Perspective view showing the appearance of the washing machine from the rear Perspective view showing the appearance of the washing machine from the front

Explanation of symbols

1 is an outer box, 2 is a top cover, 3 is an inlet, 5 is a machine room, 20 is a rotating tub (washing tub), 23 is an inlet, 24 is a slit, 25 is a basket, 27 is a fan casing, 30 is A spiral chamber, 31 is a duct, 32 is an air inlet, 35 is an air outlet, 38 is a fan, 42 is a PTC heater (heat source), 43 is a PTC element, and 44 is a radiating fin.

Claims (4)

An outer box containing a washing tub;
A top cover provided at the upper end of the outer box, and having a laundry inlet for the washing tub;
A machine room provided in the top cover and positioned behind the charging port;
An outside air inlet provided on the rear wall of the machine room;
A fan casing having a duct that is housed in the machine room and that has a duct projecting in the left-right direction from the spiral chamber in which the fan is housed, and
An intake port provided in the spiral chamber and facing the front of the intake port;
An exhaust port provided in the duct for discharging the air discharged from the fan into the washing tub;
A heat source that is housed in the duct and heats the air discharged from the fan,
The duct is disposed higher than a horizontal line passing through the lowest point of the inner circumferential surface of the spiral chamber,
The washing machine according to claim 1, wherein the heat source is disposed higher than a horizontal line passing through the lowest point on the inner peripheral surface of the intake port. The rear wall of the machine room is provided with a plurality of slits as the intake port,
2. The washing machine according to claim 1, wherein a ridge having a larger width dimension in the left-right direction than the slit directly below is provided above each slit. The duct exhausts the air discharged from the fan through a non-linear path,
In the duct, a PTC heater formed by connecting a radiation fin to the PTC element is housed as a heat source,
The said radiation fin is cross-arranged with respect to the distribution direction of a discharge wind so that the wind discharged from the said fan may be guide | induced to the said exhaust port side, The any one of Claims 1-2 characterized by the above-mentioned. Washing machine. The duct exhausts the air discharged from the fan through a bent path,
4. The washing machine according to claim 3, wherein the heat dissipating fins are arranged so as to intersect at an angle of "1/2" of the bending angle of the exhaust path with respect to the flow direction of the air discharged from the fan.

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