TWI638924B - Washing machine - Google Patents

Abstract

Provide a washing machine that prevents the occurrence of wounds or discoloration.

a drum (2) for accommodating a washing object, a tank (3) for rotatably accommodating the drum (2), a water supply solenoid valve (4) for supplying water to the outer tank (3), and a supply valve to be supplied to the drum (2) The heating unit (5) for heating the washing water, and the heating unit (5) is a heating unit (5), and is provided with a tube portion through which the washing water flows, and a heating state in which the washing water flowing through the tube portion is switched to any of warm water and steam. element.

Description

Washing machine

The present invention relates to a washing machine including a heating means for generating steam.

In the case of the washing machine, a heating means for blowing oil to the clothes before the washing process to decompose the oil or the like has been proposed (for example, refer to Patent Document 1).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2003-93775

However, in the washing machine described in Patent Document 1, since the outlet of the steam is close to the washing tank (inner tank), for example, if the amount of the clothes is large, the steam is blown from the outlet, and the wound is broken. Or the problem of discoloration.

The present invention has been made in order to solve the above-mentioned problems and to provide a washing machine capable of preventing the occurrence of wounds or discoloration.

The present invention relates to a washing machine comprising: an inner groove for accommodating a washing, a groove for accommodating the outer groove; and a water supply valve for supplying water to the outer groove, wherein the water supply valve is supplied to the inner groove A heating device for heating the washing water, wherein the heating device includes a pipe portion through which the washing water flows, and a heating portion that heats the washing water flowing through the pipe portion to switch between warm water and steam.

According to the present invention, it is possible to provide a washing machine which can prevent the occurrence of wounds or discoloration.

1‧‧‧ frame

2‧‧‧roller (inner groove)

3‧‧‧ outer trough

4‧‧‧Water supply solenoid valve (water supply valve)

4a‧‧‧Water supply hose connection

4b‧‧‧Nugizer water supply solenoid valve

4c‧‧‧Finishing water supply solenoid valve

4d‧‧‧ outer tank water supply solenoid valve

4e‧‧‧Cooling water supply solenoid valve

4f‧‧‧Switching valve

5‧‧‧heating unit (heating unit)

3d‧‧‧ outer cover

11‧‧‧Roller motor

23‧‧‧Filter box

24‧‧‧Circulating pump

27‧‧‧Circular flow path

51‧‧‧heater cover

52, 53‧‧‧Heat collar

54‧‧‧Aluminum box

54a‧‧‧ Tube Department

55‧‧‧Heating element (heating section)

56‧‧‧Insulation

57, 58‧‧‧Heat-resistant hose (tube with elasticity)

100‧‧‧Drum type washing and drying machine (washing machine)

Fig. 1 is a perspective view showing the appearance of a washing machine according to an embodiment of the present invention.

Fig. 2 is a side view schematically showing the internal structure of a washing machine according to an embodiment of the present invention.

[Fig. 3] A perspective view showing a circulation flow path provided in the outer tank cover.

Fig. 4 is a front elevational view showing the internal structure of a washing machine according to an embodiment of the present invention.

[Fig. 5] A schematic view showing the water supply path of the water supply solenoid valve.

Fig. 6 is a perspective view showing the appearance of the heating unit.

Fig. 7 is a front view showing the heating unit.

Fig. 8 is a sectional view taken along line I-I of Fig. 7.

Fig. 9 is a sectional view taken along line II-II of Fig. 8.

Fig. 10 is a schematic configuration diagram of a heating element of a heating unit.

Fig. 11 is a sectional view taken along line III-III of Fig. 4.

Fig. 12 is a side cross-sectional view schematically showing the spray state of the nozzle.

[Fig. 13] A block diagram showing a washing machine.

Fig. 14 is a flowchart showing the operation procedure of the washing operation of the washing machine (with circulation washing/with drum rotation).

Fig. 15 is a flowchart showing the operation procedure of the washing operation of the washing machine (without circulation washing/with drum rotation).

Fig. 16 is a flow chart for explaining an operation procedure of a washing operation of a washing machine (no circulation washing/no drum rotation).

Next, the washing machine (drum type washing and drying machine) according to the embodiment of the present invention will be described in detail with reference to the appropriate drawings. Further, in the present embodiment, the washing machine 100 having the circulation pump for circulating the washing water is described as an example, but it can also be applied to a washing machine without circulation pumping. Further, in the present embodiment, a drum type washing and drying machine is described as an example, but it may be applied to a vertical type washing and drying machine, and may be applied to Vertical washing machine without drying function (so-called automatic washing machine).

First, the overall configuration of the washing machine 100 (drum type washing and drying machine) will be mainly described with reference to Figs. 1 and 2 . Fig. 1 is a perspective view showing the appearance of a washing machine according to an embodiment of the present invention, and Fig. 2 is a side view schematically showing the internal structure of the washing machine according to the embodiment of the present invention. The directions of the up, down, left, and right directions before and after the following description are based on the directions of the up, down, left, and right before and after FIG.

As shown in Fig. 1, the washing machine 100 includes a frame 1 constituting an outer casing, and the casing 1 includes a drum 2 (inner groove), an outer tank 3, a water supply solenoid valve 4 (water supply valve), and a heating unit. 5 (heating means) and the like.

The frame 1 is attached to the bottom portion 1h, and is configured by the left and right side plates 1a and 1b, the front cover 1c, the back cover 1d (see FIG. 2), the upper cover 1e, and the lower front cover 1f. The left and right side plates 1a and 1b are combined with a U-shaped upper reinforcing material 36 (see FIG. 4), a front reinforcing material 37 (see FIG. 2), and a rear reinforcing material (not shown), and the bottom portion 1h is formed to form a box. Frame 1 of the shape. The upper cover 1e is provided with a water supply hose connection port 4a from the water faucet and a water suction hose connection port 17a for the remaining hot water of the bath.

Further, an operation panel 6 is provided at the center of the upper portion of the casing 1. The operation panel 6 is provided with a power switch 39, operation buttons 12 and 13, and a display 14. Further, the operation panel 6 is electrically connected to a control device 38 (see FIG. 2) provided at a lower portion of the casing 1.

Fig. 2 is a side view schematically showing the internal structure of a washing machine according to an embodiment of the present invention.

As shown in Fig. 2, the front reinforcing material 37 is provided to be provided on the front cover 1c. The center of the door is provided for access to the door 9 for access to the garment. The door 9 is supported by the hinge 9c provided on the front reinforcing member 37 so as to be openable and closable. When the door opening button 9d (refer to FIG. 1) provided on the front cover 1c is pressed, the lock mechanism (not shown) is disengaged and opened, and the door 9 is pressed against the front cover 1c to be locked and closed. Further, the front reinforcing material 37 is concentric with the opening of the outer groove 3 to be described later, and has a circular opening for taking in a garment.

A container 19 is placed on the left side of the upper portion of the casing 1. The container 19 is placed therein so as to be attachable to the detergent tray 7 which is pulled out from the front opening. In the case of the lotion, the lotion tray 7 is pulled out in the manner shown by the two-dot chain line in Fig. 1. Further, the container 19 is placed and fixed to the reinforcing member 36 above the casing 1. Further, a water outlet 19a is provided later on the left side surface of the container 19. The water outlet 19a is formed at the lowest position of the bottom surface of the container 19 which is formed into a mortar shape.

On the rear side of the container 19, a water supply related member such as a water supply solenoid valve 4 (refer to FIG. 1), a bath water suction pump 17, a water level sensor 34, and the like are provided. The water supply unit 15 is provided in the upper portion of the container 19 for opening.

The drum 2 as a washing and dewatering tank has a bottom cylindrical shape and is rotatably supported. Further, the drum 2 has a plurality of through holes (not shown) for water supply and ventilation on the outer peripheral wall and the bottom wall, and an opening 2a for taking in and out of the garment is formed on the front end surface. A fluid balancer 2b integrated with the drum 2 is provided at a peripheral portion of the opening 2a. Further, the central axis of rotation of the drum 2 is inclined such that the horizontal or opening side becomes higher.

The outer tub 3 has a bottomed cylindrical shape, and the drum 2 is internally wrapped on the coaxial side, and has an opening at the front, and a drum motor 11 is attached to the outer center of the rear end surface. The drum motor 11 rotates the drum 2 in both the forward and reverse directions. The rotating shaft of the drum motor 11 passes through the outer tub 3 and is coupled to the drum 2. Further, an opening cover 3d for storing water in the outer tank 3 is provided in the opening portion on the front surface of the outer tub 3. In addition, the outer groove 3 is provided with a damper 8 fixed to the bottom portion 1h as a shockproof support on the lower side. The damper 8 is disposed on the left and right sides and mainly absorbs vibration in the up and down direction. A rubber telescopic tube 10 is attached to the opening of the outer tank 3, and the door 9 is shielded to seal the outer tank 3.

At the rear side of the outer side of the outer tank 3, a water supply port 3a for supplying water or a lotion to the outer tank 3 is provided. The water supply port 3a and the water outlet 19a of the container 19 are connected by a rubber bellows hose 20. Further, on the inner peripheral surface of the bottom side of the outer tub 3, a concave groove portion 3f is provided to extend in the axial direction of the outer tub 3. The bottom surface of the recessed portion 3f is an inclined surface that descends from the front side to the rear side, and a drain port 21 is provided on the rear side of the recessed portion 3f. The bellows hose 22 is connected to the drain port 21 through the connector 21a. An inflow port 18 for circulating water at the bottom is provided on the front side of the groove portion 3f.

The drain water discharged from the drain port 21 is introduced into the filter case 23 through a water inlet (not shown), and then introduced into the drain hose 26 through a water discharge port (not shown). A drain valve 25 is provided in the middle of the drain hose 26.

Further, a gas trap 3e is provided at the lowermost portion of the end surface of the rear portion of the outer tub 3. Connected to the outer groove 3 (groove portion 3f) under the air trap 3e Through the hole 3e1, the upper portion of the gas trap 3e is connected to the water level sensor 34 by the pipe 35, and the water level in the outer tank 3 is detected.

Further, between the outer tank 3 and the bottom portion 1h, a filter case 23, a circulation pump 24, and a drain valve 25 are provided.

The filter case 23 is formed in a cylindrical shape having an opening on the front side, and accommodates a detachable filter (not shown) inside, and collects foreign matter or lint in the washing water. Further, the filter case 23 opens the door 1g provided to the lower front cover 1f, and the knob 23d is rotated so that the filter can be easily attached and detached (not shown). This filter case 23 is inclined such that the front side is higher than the rear side.

The circulation pump 24 is a centrifugal pump and is configured by a pump casing, an impeller (also referred to as a roller), and a circulating pump motor (all not shown).

A drying pipe 29 is provided on the inner side of the back cover 1d of the casing 1. The drying tube 29 is connected to an intake port provided at the rear of the outer tub 3 by a rubber bellows hose 29a. Further, in the drying pipe 29, a water-cooling dehumidifying mechanism (not shown) is built in. The water-cooling and dehumidifying mechanism is in communication with a cooling water supply solenoid valve 4e, which will be described later. During the drying operation, the cooling water for water-cooling and dehumidification is introduced into the drying pipe 29 from the cooling water supply solenoid valve 4e.

Further, during the drying operation, the warm air is blown into the drum 2 by a heater, a blower fan or the like (not shown), and moisture is evaporated from the clothes. The air which is a high-temperature and high-humidity air is sucked into the drying pipe 29, and is cooled and dehumidified by a water-cooling dehumidifying mechanism (not shown) to be air of low temperature and low humidity, and is heated by a heater (not shown) and then blown into the drum 2. In addition, a heat pump may be used instead of the heater or the water-cooling dehumidification mechanism.

Figure 3 is a perspective view showing the circulation flow path provided in the outer tank cover.

As shown in Fig. 3, the discharge port 44 of the circulation pump 24 is connected to one end of the bellows hose 41. The other end of the bellows hose 41 is connected to the inlet port 3g of the circulation flow path 27. This inlet port 3g is provided on the outer surface of the outer tank cover 3d.

The circulation flow path 27 is configured by a tubular passage integrally formed by the inner peripheral wall of the resin outer cover 3d. The circulation flow path 27 is formed to be curved along the opening 3s (see FIG. 4) of the outer tank cover 3d, and is connected to the nozzle 27a formed on the upper portion of the outer tank cover 3d. This nozzle 27a ejects the washing water discharged from the discharge port 44 of the circulation pump 24 from the upper portion of the outer tank cover 3d toward the drum 2 (see Fig. 2).

When the above-described drain valve 25 (refer to FIG. 2) is closed, when the circulation pump motor (not shown) of the circulation pump 24 is rotating, the washing water in the outer tank 3 (refer to FIG. 2) is drained. The mouth 21 (see Fig. 2) passes through the bellows hose 22 (see Fig. 2), and the foreign matter is removed by a filter (not shown) in the filter case 23 (see Fig. 2). Thereafter, the washing water is sent to the circulation flow path 27 through a pump casing (not shown) and a bellows hose 41, and is sprinkled from the nozzle 27a into the drum 2 (see Fig. 2).

Further, when the circulation pump motor (not shown) of the circulation pump 24 is reversed, the washing water in the outer tank 3 (see FIG. 2) passes through the bellows hose 22 from the drain port 21 (see FIG. 2) (refer to FIG. 2). The foreign matter is removed by a filter (not shown) in the filter case 23 (see FIG. 2). After that, the water is washed through the pump casing (not shown) and through the bellows hose 40 (refer to Figure 2). And the connector 18a (refer FIG. 2) returns to the outer tank 3. In this manner, the circulation pump 24 is reversed to perform a lotion dissolution procedure which will be described later.

Fig. 4 is a front elevational view showing the internal structure of the washing machine according to the embodiment of the present invention.

As shown in FIG. 4, a fixing portion 3t formed in a convex shape by synthetic resin is formed on the outer peripheral surface (upper surface) of the outer tub 3. A support member 71 made of a synthetic resin is fixed to the center of the upper reinforcing plate 36 in the left-right direction. At the support member 71, one end of the coil spring 72 is hung, and at the fixed portion 3t, the other end of the coil spring 72 is suspended, and the upper reinforcing plate 36 is suspended by the coil spring 72 to suspend the outer groove 3. In addition, although the illustration is abbreviate|omitted, the coil spring 72 is arrange|positioned in the front-back front, and the vibration of the front-surface direction of the outer tank 3 is mainly absorbed.

The water supply solenoid valve 4 and the heating unit 5 are disposed above the outer tank 3 so as to be arranged in the left-right direction. Further, the water supply solenoid valve 4 and the heating unit 5 are attached to the left side of the coil spring 72, and are respectively fixed to the upper reinforcing material 36. The heating unit 5 is connected to the outer tank cover 3d and the heat-resistant hose 58 (tube having elasticity) which is flexible (elastic) to be described later, so that the vibration of the outer tank 3 during operation is not transmitted. In addition, the material for fixing the upper reinforcing material 36, such as the water supply solenoid valve 4 to be described later, is also connected to the outer tank 3 by a flexible hose or a bellows hose, so that the outer tank 3 is operated. The vibration is not transmitted to the water supply solenoid valve 4 or the like.

The water supply solenoid valve 4 is provided with a lotion supply solenoid valve (first solenoid valve) 4b, a finishing agent water supply solenoid valve (second solenoid valve) 4c, an outer tank water supply solenoid valve (third solenoid valve) 4d, and a cooling water supply electromagnetic Valve (4th electromagnetic The valve 4e is configured such that each discharge port is forward.

Figure 5 is a schematic illustration of the water supply path of the heating unit.

As shown in Fig. 5, the lotion water supply solenoid valve 4b is opened to open the water from the water supply hose connection port 4a through the water supply path L1 to the lotion placement chamber of the lotion tray 7 ( Not shown). The water of the water which is injected into the washing agent into the chamber is injected into the container 19 (see Fig. 2) through the bellows hose 20, and is injected between the drum 2 and the outer tub 3 together with the put-in lotion.

The finish supply water supply solenoid valve 4c is opened to open the water from the water supply hose connection port 4a through the water supply path L2 to supply the finishing agent into the detergent bowl 7 (not shown). The water in the water which is filled in the finishing agent is placed between the drum 2 and the outer tub 3 through the bellows hose 20 from the placing container 19 (see Fig. 2) together with the placed finishing agent.

The outer tank water supply solenoid valve 4d is opened to open the water from the water supply hose connection port 4a through the water supply path L3 and the bellows hose 20 to supply water between the drum 2 and the outer tank 3.

The cooling water supply solenoid valve 4e is a water-cooling dehumidifying mechanism (not shown) that supplies water from the water supply hose connection port 4a through the water supply path L4 to the blast pipe 30.

A switching valve 4f is provided in the middle of the water supply path L4 that connects the cooling water supply solenoid valve 4e and the blast pipe 30. In the switching valve 4f, one discharge port 4f1 is connected to the blast pipe 30 side, and the other discharge is performed. 埠4f2 is connected to the water supply path L5 (heat-resistant hose 57 to be described later). One end of the heating unit 5 is connected to the water supply path L5, and the other end of the heating unit 5 is connected to the water supply path L6 (heat-resistant hose 58 to be described later). In this manner, since the heating unit 5 is connected to the switching valve 4f so that the water supply solenoid valve 4 used so far can be directly used, the flow path including the heating unit 5 can be easily configured.

Further, the bath water from the water suction hose connection port 17a taken by the bath water supply pump 17 is supplied between the drum 2 and the outer tub 3 through the water supply paths L7 and L3 and the bellows hose 20.

Figure 6 is a perspective view showing the appearance of the heating unit, and Figure 7 is a front view showing the heating unit. In addition, FIG. 6 omits illustration of the water supply paths L5 and L6 (heat-resistant hoses 57 and 58) connected to the water supply solenoid valve 4 (see FIG. 5).

As shown in Fig. 6, the heating unit 5 is formed by appropriately switching between steam and warm water, and includes an inlet P1 into which the channel water is introduced, and an outlet P2 from which the heated channel water (steam or warm water) is taken out.

Further, the heating unit 5 has a heater cover 51 having a substantially rectangular parallelepiped shape and is formed to be elongated in the front-rear direction. The heater cover 51 is configured by a housing portion 51a and a lid portion 51b, and accommodates an aluminum case 54 to be described later.

In the accommodating portion 51a, the lid portion 51b is slidably attached to the accommodating portion 51c. Further, the accommodating portion 51a is formed on the side plate opposite to the hinge portion 51c, and the screw projections 51d and 51d of the screw 51f are screwed from the upper side in the front-rear direction. In the lid portion 51b, fixing pieces 51e and 51e for inserting the screws 51f are formed at positions corresponding to the screw projections 51d.

As shown in FIG. 7, a groove 51h that communicates with the inside of the heater cover 51 is formed in the front plate of the accommodating portion 51a. This slit 51h is formed in a U shape in a manner in which the upper side is released. From this, the slit 51h is partially attached to one of the heat-resistant collars 53 of the aluminum case 54 which will be described later.

Further, a groove 51g (see FIG. 8) that communicates with the inside of the heater cover 51 is formed in the plate after the accommodating portion 51a. Further, the slit 51g is also attached to a portion of the heat-resistant collar 52 of the aluminum case 54 to be described later.

Figure 8, is a cross-sectional view taken along line I-I of Figure 7, and Figure 9 is a cross-sectional view taken along line II-II of Figure 8. In addition, FIG. 9 shows a state in which the heater cover 51 and the heat insulating material 56 to be described later are removed from the heating unit 5.

As shown in FIG. 8, the heating unit 5 is composed of an aluminum case 54, a heating element 55 (heating unit), and a heat insulating material 56 together with the heater cover 51 and the heat-resistant collars 52 and 53.

The aluminum case 54 is formed of, for example, an aluminum alloy material having high thermal conductivity, and has a tube portion 54a formed in the axial direction in the front-rear direction, and an element housing portion 54b in which the heating element 55 is housed around the tube portion 54a. The tube portion 54a has connection portions 54c and 54d which are formed longer than the element housing portion 54b in the axial direction (front-rear direction). Thus, the heating element 55, which will be described later, is not in direct contact with the channel water.

The heat-resistant collar 52 is attached to the connecting portion 54c on the inlet P1 side, and the heat-resistant collar 53 is attached to the connecting portion 54d on the outlet P2 side. Further, the length L of the tube portion 54a is formed sufficiently longer than the inner diameter (diameter) D of the tube portion 54a. The heat-resistant collar 52 has a fitting portion with the connecting portion 54c The large diameter portion 52a and the small diameter portion 52b having an inner diameter D2 smaller than the inner diameter D1 of the large diameter portion 52a are configured such that the axial center of the large diameter portion 52a coincides with the axial center of the small diameter portion 52b. Further, the axial center of the tube portion 54a and the axial center of the heat-resistant collar 52 are aligned. The heat-resistant collar 53, like the heat-resistant collar 52, has a large-diameter portion 53a and a small-diameter portion 53b, and the axial center of the large-diameter portion 53a, the axial center of the small-diameter portion 53b, and the axial center of the tube portion 54a are respectively aligned. Formed by means.

Further, the large diameter portions 52a and 53a and the small diameter portions 52b and 53b have a shape that is reduced in diameter from the large diameter portions 52a and 53a toward the small diameter portions 52b and 53b. Further, the heat-resistant collar 52 is a front end portion including a portion of the large-diameter portion 52a which is discharged outward from the slit 51g of the heater cover 51. Further, the heat-resistant collar 53 has a tip end including a portion of the large-diameter portion 53a projecting outward from the slit 51h of the heater cover 51.

The heating element 55 is composed of, for example, a PTC (Positive Temperature Coefficient) element (PTC heater). The PTC element is used so that the upper limit temperature at the time of heating can be set in advance, and the temperature of the element can be prevented from excessively rising. Further, the heating element 55 is not limited to the PTC element, and other types such as a sheathed heater may be applied.

Further, the heating element 55, which is a plate-like shape, is inserted into the element accommodating portion 54b, and is disposed such that the element accommodating portion 54b is along the axial direction of the tube portion 54a. Therefore, the washing water can be heated throughout the entire axial direction of the tube portion 54a.

The heat insulating material 56 is made of glass wool, rock wool, or the like. It is provided so as to surround the periphery of the aluminum case 54. The aluminum case 54 is housed in a resin cover 51 made of resin in a state of being wound by the heat insulating material 56. In this manner, the periphery of the aluminum case 54 is disposed so as to be surrounded by the heat insulating material 56, so that the heat generated by the heating element 55 can be prevented from escaping to the outside of the heater cover 51, and the heat generated by the heating element 55 can be effectively transmitted. To the tube portion 54a.

As shown in Fig. 9, the aluminum case 54 is formed in a substantially rectangular shape in cross section, and a heating element 55 is disposed above and below the central tube portion 54a. Further, the aluminum case 54 is provided above the tube portion 54a above, below, on the left side, and on the right side, and has a rectangular element housing portion 54b into which the heating element 55 is inserted. The upper and lower element accommodating portions 54b are formed to be horizontally long in cross section, and the left and right element accommodating portions 54b are formed to be vertically long in cross section. Further, each of the element housing portions 54b is formed linearly along the tube portion 54a in a direction orthogonal to the plane of the paper. Further, although not shown, the heating element 55 is housed in the element accommodating portion 54b in a state of being covered with an insulating sheet.

Further, the corners of the four corners of the aluminum case 54 have concave portions 54e which are notched in a concave shape toward the axis O. Thereby, it is possible to suppress the heat of the heating element 55 from being caught by the corner portion, and it is possible to effectively collect the heat of the heating element 55 in the tube portion 54a.

The heating unit 5 configured as described above is formed in the inlet P1 from the small diameter portion 52b to the large diameter portion 52a, and the outlet P2 is formed in the shape of the small diameter portion 53b from the large diameter portion 53a so as to be between the inlet P1 and the outlet P2. The water (washing water) supplied from the inlet P1 side is accumulated in the pipe portion 54a, and the liquid phase and the gas phase can be mixed together to generate steam.

Figure 10 is a schematic configuration diagram of a heating element of a heating unit.

As shown in Fig. 10, the heating element 55 is constituted by a plate-shaped element portion 55a and a pair of electrode plates 55b and 55c sandwiching both sides of the element portion 55a. Further, one of the electrode plates 55b and 55c is a positive electrode and the other is a negative electrode. Further, the electrode plates 55b and 55b of the adjacent element portions 55a are connected by a collinear line (lead) 55d. Further, the adjacent electrode plates 55c and 55c are connected by a collinear line (lead) 55e. Then, lead wires 55f and 55g connected to the outside of the heating unit 5 are connected to the electrode plates 55b and 55c of one heating element 55 of the four heating elements 55. At the front ends of the lead wires 55f and 55g, connectors 55h and 55h are provided, and the connectors 55h and 55h are connected to a connector (not shown) extending from the power source side.

In this way, a plurality of heating elements 55 are connected in parallel, and the leads 55f and 55g drawn from the heating unit 5 are collected into one set (two), so that the number of wirings connected to the heating unit 5 can be reduced, and the heating unit can be easily realized. 5. Therefore, even if the number of the heating elements 55 is five or more, it is possible to take out only two leads from the heating unit 5 and cope with them. Further, in the present embodiment, a case where the heating unit 5 includes four heating elements 55 will be described as an example, but only five or more heating elements 55 may be provided, or three or less heating elements 55 may be provided. .

Figure 11 is a cross-sectional view taken along line III-III of Figure 4.

As shown in FIG. 11, the heating unit 5 is disposed so as to face the upper and lower sides of the outer tube 3 so that the axial direction of the tube portion 54a faces the front-rear direction. Further, the heating unit 5 is formed on the upper surface of the heater cover 51 to form a claw portion. 51i, the claw portion 51i causes the heating unit 5 to hang on the end edge portion of the upper reinforcing member 36. Further, the heating unit 5 is disposed such that the center front side in the axial direction is connected to the lower surface of the upper reinforcing member 36, and is disposed such that the center rear side in the axial direction protrudes rearward from the upper reinforcing member 36.

Further, the heat-resistant collar 52 of the heating unit 5 is connected to one end (downstream end) of the heat-resistant hose 57, and the other end (upstream end) of the heat-resistant hose 57 is connected to the discharge port 4f2 of the switching valve 4f. Further, the heat-resistant collar 53 of the heating unit 5 is connected to one end (upstream end) of the heat-resistant hose 58, and the other end of the heat-resistant hose 58 is connected to the introduction portion 3h formed on the front side of the outer tank cover 3d (refer to the figure). 4).

In the heating unit 5 configured as described above, the switching valve 4f is switched to the heating unit 5 while the heating element 55 is energized, and the cooling water supply solenoid valve 4e (see FIG. 5) of the water supply solenoid valve 4 is turned ON. /OFF is controlled so that the channel water (washing water) is introduced into the tube portion 54a of the heating unit 5 through the heat-resistant hose 57. Then, heat from the heating element 55 is applied to the water flowing through the tube portion 54a to generate steam or warm water.

That is, in the case where the heating unit 5 generates the vapor ST, the heating unit 5 is first emptied before the supply of the channel water, and the temperature of the tube portion 54a is raised. That is, the heating element 55 is energized so that the aluminum case 54 is warmed by heat transfer, and the tube portion 54a (flow path surface) is heated. After the temperature of the tube portion 54a rises to a predetermined temperature (maximum value), the cooling water supply solenoid valve 4e is turned ON/OFF, and a predetermined amount of channel water is supplied to the tube portion 54a through the heat-resistant hose 57. In addition, both quantitatively mean the amount (small amount) that can be generated by steam. When a small amount of water is supplied to the pipe portion 54a, the water is vaporized, and Water vapor (vapor ST) is generated. In this case, when the channel water is supplied to the tube portion 54a, the surface temperature of the channel portion of the tube portion 54a is lowered, but after the channel water is supplied in a predetermined amount (small amount), the cooling water supply solenoid valve 4e is turned OFF to stop the channel water. The supply is such that the temperature of the tube portion 54a rises again to a predetermined temperature. In this way, the channel water is intermittently supplied, and the channel water is supplied while the temperature of the tube portion 54a is restored, and the surface temperature of the channel portion of the tube portion 54a is maintained above the temperature range at which the vapor ST is generated, so that the vapor ST can be intermittently generated. .

Further, when the heating unit 5 generates the warm water HW, the heating unit 5 is air-cooled and then supplied with water, or the heating unit 5 is energized after the water supply is started, so that the flow path of the tube portion 54a is formed so as not to generate steam. The temperature of the surface is controlled. For example, the cooling water supply solenoid valve 4e is ON/OFF controlled, and water is continuously supplied to generate warm water (warm water HW) which does not completely become the steam ST.

The vapor ST generated by the heating unit 5 is extruded to the side of the heat-resistant hose 58 by the vapor pressure generated at that time. In addition, the warm water HW generated by the heating unit 5 is pushed out to the heat-resistant hose 58 side by the water supply pressure (water channel pressure) from the cooling water supply solenoid valve 4e. In this way, the water supply pipe portion 54a is used as a common flow path regardless of whether the steam ST is generated or when the warm water HW is generated.

Figure 12 is a side cross-sectional view schematically showing the state of spray of steam/warm water. In addition, in FIG. 12, for the convenience of description, the hot gas and the warm water HW which are changed by the vapor ST are overlapped, but in fact, either the hot air and the warm water HW are supplied to the clothing.

As shown in FIG. 12, the orientation of the nozzle 59 is set to be oriented toward the drum. The corner portion (the lowermost position) P of the bottom side of the boundary between the casing plate 2c and the bottom plate 2d. Incidentally, the steam ST generated by the heating unit 5 is passed through the heat-resistant hose 58, and the temperature is lowered from the nozzle 59, so that the vapor ST (gas) is changed into hot air (high-temperature water droplets, liquid). The clothing type is not steam (gas), but is sprayed with hot air (liquid). On the other hand, the warm water HW generated by the heating unit 5 is discharged from the nozzle 59 through the heat-resistant hose 58, and is sprayed with the warm water HW (liquid) in the washing material (clothing).

Figure 13 is a block diagram showing the washing machine.

As shown in FIG. 13, the control device 38 is provided with a microcomputer 50, a drive circuit 64, and the like, and also has a switch signal of the operation buttons 12 and 13 shown in FIG. 1, or an input circuit of output signals from various sensors. . In addition, the microcomputer 50 receives various information signals of the user's operation or the washing program and the drying program. The microcomputer 50 is connected to the drum motor 11 shown in FIG. 2, the water supply solenoid valve 4, the drain valve 25, the blower fan (not shown), etc. through the drive circuit 64, and is controlled by opening, closing, rotating, and energizing. . Further, in order to notify the user of the information about the washing machine 100, the display 14 (see FIG. 1), the light-emitting element 66, or the buzzer 67 are controlled.

Fig. 14 is a flowchart showing the operation procedure of the washing operation of the washing machine (with circulation washing/with drum rotation). Further, in the circular symbol (○) of Fig. 14, the water supply solenoid valves 4b, 4c, 4d, and 4e are controlled to be opened and closed to supply the channel water, and the drain valve 25 is opened.

As shown in FIG. 14, in step S1, the control device 38 receives the washing. The input of the policy selection of the operation program of the machine 100 (the policy selection). Here, the user opens the door 9, and puts the washing clothes inside the drum 2 to close the door 9. Then, the user operates the operation buttons 12 and 13 to select a policy for inputting the operation program. The operation buttons 12, 13 are operated such that the policy of the selected operation program is input to the control device 38. The control device 38 reads the corresponding operation mode from the operation mode database based on the policy of the input operation program, and proceeds to step S2. In addition, the following description will be described as a selection criteria (washing - washing 2 times - dehydration).

In step S2, the control device 38 executes a program (amount of cloth sensing) for detecting the weight (amount of cloth) of the clothes placed on the drum 2. Specifically, the control device 38 drives the drum motor 11 to rotate the drum 2, and calculates the weight (amount of cloth) of the clothes before water injection.

In step S3, the control unit 38 executes a routine for calculating the washing amount and the running time (the washing amount operation time is calculated). Specifically, the control device 38 controls the water supply solenoid valve 4 and directly supplies water to the water supply port 3a (see FIG. 2) of the outer tub 3. The conductivity measuring unit of the control unit 38 detects the electrical conductivity (hardness) of the water supplied through the conductivity sensor (not shown) disposed at the bottom of the outer tank 3. In addition, the temperature of the water supplied is detected by the sensor. Thereafter, the water supply solenoid valve 4 is controlled, and the water supply to the outer tank 3 is ended.

The control device 38 determines the amount of washing and the running time by the map search based on the amount of cloth detected in step S2, the electrical conductivity (hardness) of water, and the temperature of water. Then, the control device 38, The determined washing dose and running time are displayed on the display 14. In addition, although the electric conductivity (hardness) of water and the water temperature are detected by water supply to the outer tank 3, it is not limited to this. For example, the electric conductivity (hardness) and water temperature of the water during the previous operation are first stored in the memory unit (not shown) of the microcomputer 50, and may be used.

In step S4, the control device 38 executes a lotion placement waiting program (a lotion placement waiting program). For example, the control device 38 waits for a predetermined time and proceeds to step S5. The user is in standby to refer to the amount of washing displayed on the display 14, and the lotion tray 7 is filled with a lotion. Further, the control device 38 may be used as a means for detecting the opening and closing of the detergent disk 7 (not shown), and when the detergent disk 7 is closed after being opened, it is regarded as a lotion. And proceeds to the configuration of step S5.

In step S5, the control device 38 executes a lotion dissolution program (lotion dissolution program). For example, the control device 38 controls the lotion supply solenoid valve 4b to supply water to the powder lotion placement chamber and the liquid lotion placement chamber of the lotion container 7 through the water supply path L1. The powder detergent is placed in the chamber and the detergent and water in the liquid detergent filling chamber, and is passed through the detergent delivery tube, the bellows hose 20, the water supply port 3a located at the upper portion of the rear side of the outer tank 3, and formed at the bottom of the outer tank 3. The water supply path of the inner surface of the wall flows into the groove portion 3f of the outer groove 3 from the outlet thereof.

When the water is supplied to a predetermined amount of water, the control device 38 controls the lotion supply solenoid valve 4b to stop the water supply. Then, the control device 38 performs a lotion dissolution operation (lotion dissolution operation). Specifically, the control device 38 controls (reverses) the circulating pump 24 to make drainage from the drain The water and the lotion which the mouth 21 sucks through the bellows hose 22 are discharged through the bellows hose 40 from the inflow port 18 of the groove portion 3f.

The water and the lotion discharged from the inflow port 18 flow through the groove portion 3f and circulate toward the drain port 21. Thereby, the water and the lotion are stirred, and the lotion is dissolved in water. When the predetermined time (for example, 10 seconds) elapses, the control device 38 stops the circulation pump 24, and proceeds to step S6.

In step S6, the control device 38 executes a steam (vapor)/warm water supply program (steam/warm water supply program). For example, the control device 38 controls the cooling water supply solenoid valve 4e while switching the switching valve 4f to the heating unit 5 side, and energizes the heating unit 5. The control device 38 rotates the drum 2 in the forward and reverse directions at a predetermined rotational speed (for example, 40 r/min) to generate steam (vapor) or warm water in the heating unit 5.

For example, in a washing machine rated at 10 kg, when it is determined that the clothes of 6 kg are placed by the cloth amount sensing in step S2, it is determined that the distance between the outlet of the nozzle 59 and the clothing is close, and in the heating unit 5, The vapor ST is generated to generate warm water HW (for example, 25 ° C to 65 ° C). Thereby, warm water is sprayed from the nozzle 59 toward the clothes.

In addition, when it is determined that the clothes of 2 and 3 kg are placed by the cloth amount sensing in the step S2, the distance between the air outlet of the nozzle 59 and the clothing is kept to a certain extent, so that the steam ST is generated in the heating unit 5. Thereby, the vapor ST generated by the heating unit 5 is discharged from the air outlet of the nozzle 59 through the heat-resistant hose 58 and the nozzle 59. Then, the temperature is lowered until the discharge from the nozzle 59, and the hot air is changed from the vapor ST to the high temperature, and the hot air of the mist is sprayed to the clothes.

In addition, not only the control of the amount of the step S2 but also the control of the steam and the warm water can be switched, and if the clothes of the step S2 are sensed and the clothes of 6 kg are placed, the air outlets of the nozzles 59 and the clothes are Since the distance is close, the heating unit 5 generates warm water HW, and then the vapor ST is generated in the case where the clothes are water-containing, the volume of the clothes is reduced, and the high-temperature hot air is sprayed on the clothes.

In this way, not only the distance between the nozzle 59 and the clothing is determined by the sensing of the step S2, but the generation of the vapor ST or the generation of the warm water HW is determined, and it is also determined that the nozzle 59 is close to the clothing, and the temperature is first sprayed. The water HW is used to reduce the volume of the clothes. When it is determined that the distance between the nozzles 59 and the clothes is kept to a certain extent, the steam ST is sprayed in two stages. That is, it is not necessary to switch between the steam ST and the warm water HW depending on the amount of clothing (washing).

In step S7, the control device 38 executes the prewashing agitation program 1. Here, the pre-washing stirring program 1 refers to the water which is sprayed with steam or warm water to the clothes in step S6 and which has a high spray temperature for the clothes, and the lotion which is formed by the lotion dissolving process in step S5. A procedure in which the washing water having a high concentration is soaked and allowed to permeate the clothes.

Specifically, the control device 38 controls the drum motor 11 to rotate the drum 2 at a predetermined rotational speed (for example, 40 rpm [r/min]), replaces the clothes, and circulates the pump 24 to become a predetermined one. The rotation speed (for example, 2600 r/min) is controlled (positive rotation), and the washing water having a high concentration of the lotion sucked from the drain port 21 is discharged from the nozzle 27a provided in the opening of the outer tub 3 to the drum 2. internal. By this, mixing and washing The washing water (washing water) having a high concentration of the agent and the washing water having a high temperature such as warm water allow the enzyme in the active lotion to sufficiently permeate the washing water in the clothes, and the washing power is enhanced.

Further, in the present embodiment, step S6 and step S7 are different procedures, but it is also possible to incorporate step S7 into step S6 to control the circulation pump 24 simultaneously with the supply of steam or warm water, thereby circulating the washing water. .

In step S8, the control device 38 executes a rotary water supply program (rotary water supply program). Specifically, the control device 38 controls the lotion water supply solenoid valve 4b and the outer tank water supply solenoid valve 4d to raise the water level of the washing water in the outer tank 3. Then, the control unit 38 controls the drum motor 11 to rotate the drum 2 at a predetermined rotational speed (for example, 40 r/min) to replace the clothes. Further, the control device 38 controls (rotates) the circulating pump 24 so as to have a predetermined rotational speed (for example, 2600 r/min), and the washing water having a high concentration of the lotion sucked from the drain port 21 is The nozzle 27a provided in the opening of the outer tub 3 is discharged to the inside of the drum 2 to infiltrate the clothes inside the drum 2.

Then, when the water level of the washing water in the outer tank 3 rises to a predetermined water level, the water supply is stopped. When the water supply program is started to rotate and the predetermined time elapses, the rotary water supply program is terminated, and the process proceeds to step S9.

In step S9, the control device 38 executes the prewashing agitation program 2. Here, the pre-washing agitation procedure refers to a procedure of circulating the washing water accumulated in the bottom of the outer tank 3, whereby the washing power is increased.

Specifically, the control device 38 is configured to circulate the pump 24 The control is performed at a predetermined rotation speed (for example, 3,200 r/min), and the washing water sucked from the drain port 21 is discharged from the nozzle 27a provided in the opening of the outer tub 3 to the inside of the drum 2, and the drum is simultaneously The motor 11 is controlled to rotate the drum 2 at a predetermined rotational speed (for example, 100 r/min), so that the clothes inside the drum 2 are attached to the inner surface of the outer peripheral wall of the drum by centrifugal force, and are prevented from being applied when falling from the upper side of the drum. Mechanical force.

Further, in the present embodiment, the drum 2 is rotated in the forward direction, but it is also possible to rotate in the reverse or forward and reverse directions. When the predetermined time (for example, 3 minutes) has elapsed, the control device 38 terminates the prewashing agitation process and proceeds to step S10.

In step S10, the control device 38 executes the main washing and stirring process. Here, the main washing program refers to a procedure in which the clothes falling under the drum 2 are lifted by the rotation of the drum 2, and are dropped from the upper side of the drum 2, thereby applying mechanical force to the clothes.

Specifically, the control device 38 controls the circulating pump 24 so as to have a predetermined flow rate (for example, 3200 r/min), and the washing water sucked from the drain port 21 is opened from the opening provided in the outer tub 3. The nozzle 27a is discharged to the inside of the drum 2, and while the drum motor 11 is controlled, the drum 2 is rotated at a predetermined rotational speed (for example, 40 r/min) to wash the clothes inside the drum 2. When the predetermined time (for example, 6 minutes) has elapsed, the control unit 38 terminates the main washing and stirring process, and proceeds to step S11.

In step S11, the control device 38 executes the draining program. The control device 38 stops the drum motor 11 and the circulating pump 24 Then, the drain valve 25 is opened to drain the washing water in the outer tank 3. The water level sensor 34 continuously monitors the water level of the washing water in the outer tank 3 in the drain. When the detected value of the water level sensor 34 is lower than the predetermined water level, the control unit 38 terminates the draining process and proceeds to step S12.

In step S12, the control device 38 executes the dehydration 1 program. The control device 38 rotates the drum 2 at a high speed in the reverse direction (for example, 1250 r/min) while maintaining the valve opening of the drain valve 25, and dehydrates the washing water contained in the clothes. When the predetermined time has elapsed, the control unit 38 terminates the dehydration 1 program and proceeds to step S13.

In step S13, the control device 38 executes a rotary spray program. The control unit 38 rotates the drum 2 at a medium speed in the reverse direction (for example, 260 r/min), and controls the outer tank water supply solenoid valve 4d while opening the drain valve 25 to distribute water for the clothes. The control time of the outer tank water supply solenoid valve 4d at this time is determined based on the amount of cloth detected in step S2. The water supply is stopped after a predetermined period of time. The circulation pump 24 is controlled so as to have a predetermined flow rate (for example, 3,200 r/min), and the washing water sucked from the drain port 21 is discharged from the nozzle 27a provided in the opening of the outer tub 3 to the drum 2. internal. The circulating pump 24 is stopped after a predetermined period of time, and the drain valve 25 is opened to drain the water in the outer tank 3.

In step S14, the control device 38 executes the dehydration 2 program. The control device 38 rotates the drum 2 at a high speed in the reverse direction (for example, 1250 r/min) while maintaining the valve opening of the drain valve 25, and dehydrates the washing water contained in the clothes. Control device after a predetermined time 38, the dehydration 2 program is terminated, and the process proceeds to step S15.

In step S15, the control device 38 executes the water supply program. The control device 38 closes the drain valve 25 to control the lotion supply solenoid valve 4b, and supplies water washing water to the outer tub 3. When the temperature rises to a predetermined water level, the water supply is stopped, and the control device 38 terminates the water supply program, and proceeds to step S16.

In step S16, the control device 38 executes the finish water supply program. The control device 38 controls the finishing agent water supply solenoid valve 4c, and supplies the washing water containing the soft finishing agent to the outer tub 3.

In step S17, the control device 38 executes a rotary water supply and water supply program. The control device 38 controls the lotion water supply solenoid valve 4b and the outer tank water supply solenoid valve 4d, and supplies water to the outer tank 3 to a predetermined water level. Further, the control device 38 controls the drum motor 11 to rotate the drum 2, and the circulation pump 24 is controlled so as to be at a predetermined flow rate (for example, 2600 r/min), and the water sucked from the drain port 21 is washed. Water is discharged from the nozzle 27a provided in the opening of the outer tub 3 to the inside of the drum 2, and the soft finishing agent is allowed to permeate into the clothes.

In step S18, the control device 38 executes a water washing and agitating program. The control device 38 controls the drum motor 11 to rotate the drum 2, and the circulation pump 24 is controlled so as to have a predetermined flow rate (for example, 3200 r/min), so that the water washing water sucked from the drain port 21 is controlled. The nozzle 27a provided in the opening of the outer tub 3 is discharged to the inside of the drum 2, and is water-washed. Then, when the predetermined time has elapsed, the control device 38 terminates the water washing and stirring process, and proceeds to step S19.

In step S19, the control device 38 executes the draining program. The control device 38 stops the drum motor 11 and the circulation pump 24, and opens the drain valve 25 to drain the water in the outer tank 3. The water level sensor 34 continuously monitors the water level of the washing water in the outer tank 3 in the drain. When the detected value of the water level sensor 34 is lower than the predetermined water level, the control unit 38 terminates the draining process and proceeds to step S20.

In step S20, the control device 38 executes the dehydration process. Specifically, the control device 38 opens the drain valve 25 and controls the drum motor 11 to rotate the drum 2 at a high speed (for example, 1000 r/min) to perform centrifugal dewatering. Then, when the predetermined time has elapsed, the control device 38 stops the drum motor 11 and closes the drain valve 25 to end the washing policy (washing - washing - dehydrating).

Fig. 15 is a flowchart showing the operation procedure of the washing operation of the washing machine (without circulation washing/with drum rotation). Fig. 16 is a flowchart showing the operation procedure of the washing operation of the washing machine (without circulation washing/with drum rotation). Further, in the routine of Fig. 15, the prewashing agitation 2 (step S9) is removed from the routine of Fig. 14, that is, the circulation pump 24 is not controlled to perform the cycle cleaning. In the routine of Fig. 16, the prewashing agitation 2 is removed from the routine of Fig. 14 (step S9) (the circulation pump 24 is not controlled to be circulated during the operation of the heating unit 5), and further in step S6. The program stops the rotation of the drum 2.

Even if it is shown in Fig. 15 and Fig. 16, the washing water having a high washing liquid concentration (washing water) and warm water having a high washing agent concentration allows the enzyme in the active lotion to simultaneously saturate the washing water in the clothes. , detergency Upgrade. Further, as described above, although step S6 and step S7 are different procedures, it is also possible to incorporate step S7 into step S6 to control the circulation pump 24 simultaneously with the supply of steam or warm water, and to circulate the washing water. .

As described above, the washing machine 100 according to the present embodiment includes the heating unit 5 that switches the washing water into the warm water HW and the steam ST so that the temperature can be set when the distance between the nozzle 59 and the clothing is close. The water HW is sprayed on the clothes, and when the distance between the nozzles 59 and the clothes is far, the hot air is sprayed on the clothes, so that the occurrence of the wound cloth or the discoloration can be prevented. Further, the generation of the steam ST and the warm water HW can be switched by one tube portion 54a (common tube portion 54a), so that the heating unit 5 can be miniaturized.

Further, in the present embodiment, the heating element 55 is configured as a PTC element, so that temperature control when the tube portion 54a is heated can be easily performed.

Further, in the present embodiment, the heating unit 5 is connected to the water supply solenoid valve 4, so that the water supply solenoid valve 4 used so far can be used, and the flow path including the heating unit 5 can be easily configured. Further, it becomes possible to switch the steam ST and the warm water HW only by the ON/OFF control of the water supply solenoid valve 4. That is, the water supply solenoid valve 4 can be ON/OFF controlled to control the flow rate of the water channel water, so that the flow rate of the water channel water can be reduced to generate the vapor ST, and the flow rate of the water channel water can be increased to generate the warm water HW.

Further, in the present embodiment, the periphery of the heating element 55 is covered with the heat insulating material 56, so that heat generated by the heating element 55 can be prevented from escaping to the outside, heat can be efficiently transmitted to the tube portion 54a side, and the heat can be suppressed. Consume power.

Further, in the present embodiment, the heating unit 5 is fixed to the upper reinforcing plate 36 constituting one of the frames 1, and the heating unit 5 and the outer tub 3 are connected to each other through the flexible heat-resistant hose 58 so that the heating unit 5 can be operated. The outer tank 3 prevents the vibration from being transmitted to the heating unit 5, and the steam unit ST or the warm water HW can be stably generated in the heating unit 5.

Further, in the present embodiment, a plurality of heating elements 55 are provided, and each of the heating elements 55 is electrically connected in parallel so that the number of electric wires (leads 55f, 55g) pulled out from the heating unit 5 can be two. Thereby, it is not necessary to provide a plurality of electric wires, so that the installation of the washing machine 100 becomes easy.

The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and can be implemented in various forms. For example, although a case where a plurality of heating elements 55 connected in parallel are mounted is described as an example, the present invention is not limited thereto, and a plurality of heating elements 55 may be mounted, and the number of energized heating elements 55 may be increased or decreased. In order to control the temperature of the steam ST, it is also possible to control the temperature of the warm water HW.

Further, in the present embodiment, the case where the water from the water of the hydrant is heated is taken as an example, but the rinsing water 24 may be used to heat the washing water accumulated at the bottom of the outer tank 3. The composition. The warming of the washing water allows the enzyme of the lotion to be activated to increase the detergency.

Claims (6)

A washing machine comprising: an inner tank for accommodating a washing; a groove for accommodating the outer groove; and a water supply valve for supplying water to the outer groove; characterized by: providing a washing water supplied to the inner tank a heating device, a weight amount detecting means, and a control device, wherein the heating device includes a pipe portion and a heating portion through which the washing water flows, and the heating portion heats the washing water flowing through the pipe portion to generate warm water or In the steam control device, the heating unit controls the heating unit to switch between the warm water and the steam, and the switching is based on the distance between the blower outlet of the warm water or steam detected by the weight amount detecting means and the clothing. Or the amount of clothing or the size of the clothing. The washing machine of claim 1, wherein the heating unit is a PTC heater. The washing machine of claim 1 or 2, wherein the heating device is connected to the water supply valve. A washing machine according to claim 1 or 2, wherein the periphery of the heating portion is surrounded by a heat insulating material. The washing machine according to claim 1 or 2, wherein the heating unit includes a plurality of heating elements, and the heating elements are electrically connected in parallel. The washing machine according to claim 1 or 2, wherein the heating device is fixed to a frame body that elastically supports the outer groove, and the heating device and the outer groove are connected to each other through a tube having elasticity.