JPH04343887A - Drum type washing-drying machine - Google Patents

Abstract

PURPOSE:To prevent the danger of a electric leak by providing a heated air circulating means provided in a main body case of the upper part of a water tank to circurate drying air in a rotary drum and a washing circulating means for circulating washing water between the bottom of the water tank and the upper part thereof, and performing heating of the washing water and drying of the washing with one heater. CONSTITUTION:In heating washing water, the washing put in a water tank 2 up to a predetermined level to be heated is sprinkled through a circulating hose 15 from a pointed nozzle 16 adjacent to a warm air blow-off port in a shower-like or spattered fashion by a circulating pump 14. Thus, while the washing water is circulated it is efficiently heated by the warm air heated by a heater 6. When the dehydrated washing is dried, the washing water is not circulated, and the warm air supplied through the heater 6 into a rotary drum 3 exchanges heat with the respective surfaces of the washing stirred in the rotary drum 3 to efficiently dry the washing.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a drum-type washer/dryer in which a rotating drum serves as both a washing tub and a dehydrating tub. This relates to a drum-type washer/dryer operated by

0002

2. Description of the Related Art In a conventional drum-type washer/dryer, as shown in FIG. 6, a sheathed heater 28A inserted into the washing water in a water tank 2A is used as means for heating washing water. The temperature of the washed washing water was controlled by a sensor 23A provided at a position suitable for detecting the temperature of the washing water.

On the other hand, to dry the laundry, an air heating heater 6A and a dehumidifying heat exchanger 7A are installed in the main body case 1A above the water tank 2A separately from the washing water heating means. , and a fan 8A.

[0004] When drying the laundry, warm air heated by the heater 6A is supplied to the upper part of the water tank on one end surface side of the rotating drum 3A through the supply side duct 9A. The space 18A to which warm air is supplied includes a circular shielding groove member 3c' fixed to the rotating drum 3A and a water tank 2 that engages with the circular shielding groove member 3c'.
A circular shielding plate 2a' fixed to A divides the rotary drum 3A into a central space and a peripheral space on the end surface side.

[0005] For this reason, the space 18A on the hot air blowing side
The warm air supplied to the rotary drum 3A is guided into the rotary drum 3A through a large number of small holes 3b' provided on the end surface side of the rotary drum 3A.
The dehydrated laundry stored in the rotary drum 3A is heated and dried.

[0006] Moisture in the hot air increased due to drying is removed in a dehumidifying heat exchanger 7A connected to a water tank 2A through a discharge side duct 10A. In addition, the warm air after dehumidification is transferred to the heater 6A by the fan 8A provided in the connecting duct 11A.
The temperature is increased by the temperature lowered by drying in this heater 6A.

[0007] The warm air heated to the drying temperature is supplied to the heater 6A.
By supplying the water to the space 18A again into the water tank 2A and circulating it through the circulation path, the laundry items are continuously dried.

[0008]

[Problems to be Solved by the Invention] When the sheathed heater 28A submerged in the washing water is used as a heating means for washing water as in the conventional drum-type washer/dryer, it is necessary to have a watertight structure. The cost required for the sheathed heater 28A is relatively high.

Further, the covering member of the sheathed heater 28A submerged in the washing water is susceptible to pinholes due to corrosion caused by the washing water, so there is a risk of electrical leakage occurring through the pinholes.

Furthermore, when the air heater 6A is used separately from the sheathed heater 28A as a heating means for washing water to dry the laundry, two heaters are used to heat the washing water and the drying air.
Since two heaters are required, the cost of drum-type washer/dryers is relatively high.

The present invention has been made in view of these circumstances, and by heating the washing water and drying the laundry items using one heater, the cost can be reduced, and
The purpose is to provide a safe drum-type washer/dryer without the risk of electrical leakage.

0012

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a main body case and a large number of small holes that serve as a washing tub and a dehydration tank and are horizontally supported by a water tank in the main body case. A rotating drum, a drum drive motor, a heating air circulation means provided in the main body case at the top of the tank to circulate drying air into the rotating drum, and a washing water circulating means for circulating the washing water at the bottom of the tank to the top of the tank. The heating air circulation means includes an air heating heater connected to the top of the water tank on one end side of the rotating drum, and a dehumidifying heater connected to the top of the water tank on the other end side of the rotating drum. The washing water circulation means is composed of an exchanger and a circulation fan connected to the heater and the heat exchanger by a connecting duct, and the washing water circulation means is a circulation fan that connects the bottom of the water tank and the hot air outlet from the air heater. This drum-type washer/dryer is composed of a hose, a circulation pump that circulates washing water through the circulation hose, and a tip nozzle that is installed at the tip of the circulation hose and sprays washing water into a space on the hot air blowing side.

[0013] In order to efficiently exchange heat between the hot air and the washing water at the hot air outlet, the tip nozzle may be a nozzle that sprays the washing water in a shower-like or diffused state. preferable.

[0014] Furthermore, in order to prevent dehumidification and cooling while washing water is being heated, the operation of the dehumidifying heat exchanger is stopped while the washing water in the water tank is being heated by the hot air that has passed through the heater. It is sufficient if the configuration is such that

Furthermore, in order to improve the heat exchange of the hot air supplied to the hot air outlet, the space on the hot air outlet side is provided with a circular shielding groove member fixed to the end surface of the rotating drum;
It is preferable that the space on the end face side of the rotary drum be partitioned into a central space and a peripheral space by a circular shielding plate fixed to the water tank that engages with the shielding groove.

[0016]

[Function] In the present invention, the nozzle at the end of the circulation hose that circulates the washing water is exposed at the outlet of the hot air heated by the heater into the water tank, so when the washing water is circulated, the washing water is It is heated by hot air that passes through the heater. In addition, when drying the laundry items after spin-drying, the washing water is not circulated, so the warm air heated by the heater and repeatedly supplied into the water tank warms the laundry items and evaporates the water. Dry things.

[0017]

[Embodiment] A detailed description will be given below based on an embodiment shown in the drawings. Note that the present invention is not limited to this.

In FIG. 1, inside the main body case 1,
A water tank 2 and a rotating drum 3 supported horizontally with respect to the water tank 2 are housed.

The water tank 2 has its peripheral side suspended on the inner surface of the main body case 1 by springs 4, 4, and is supported on the inner surface of the main body case 1 by shock absorbers 5, 5, so that vibrations of the water tank 2 during operation are absorbed by the main body. The configuration is such that it does not apply to Case 1.

In FIG. 1, in the upper space 27 inside the main body case 1, the air heating heater 6, the dehumidifying heat exchanger 7, and the circulation fan 8 are connected to a position where washing water is not splashed during operation. A drying air heating circulation means is provided. The air heater 6 is connected to one end surface of the water tank 2 through a supply duct 9, and the dehumidifying heat exchanger 7 is connected to the opposite end surface of the water tank 2 through a discharge duct 10. Further, the circulation fan 8 is connected to the air heating heater 6 and the dehumidifying heat exchanger 7 through a connecting duct 11.

On the other hand, a drain hose 13 equipped with an electromagnetic drain valve 12 for guiding washing water to the outside of the main body case 1 is connected to the lower part of the water tank 2 . Water tank 2 and electromagnetic discharge valve 12
The drainage hose 13 between the drain hose 13 is equipped with a circulation pump 14,
A circulation hose 15 is connected, the tip of which emerges from the hot air outlet in the supply duct. As shown in FIG. 2, a tip nozzle 16 having a large number of small holes 16a is provided at the tip of the circulation hose 15 to spray washing water in a shower-like manner. As shown in FIG. 4, this tip nozzle 16 may have a structure that sprays washing water in a diffused state from a slit-shaped opening 16b.

The rotating drum 3 has a large number of small holes 3a on its circumferential side.
are provided, and a large number of small holes 3b are similarly provided on the end face on the hot air blowing side. A space 18 between the water tank 2 and the rotating drum 3 on the hot air blowing side is formed by a circular shielding groove member 3c fixed to the end surface of the rotating drum 3, and an inner surface of the water tank 2 that engages with the shielding groove 3d. It is divided into a central space on the hot air blowing side and a peripheral space on the outside by a fixed circular shielding plate 2a.

The rotation of the rotating drum 3 is controlled by a drum drive motor 19 attached to the bottom of the water tank 2, a belt pulley 20 fixed to the motor shaft, a belt pulley 21 fixed to the rotating drum 3, and these pulleys. This is performed by a rotational transmission means consisting of a belt 22 stretched between the belts 22.

The temperature of the washing water heated by hot air is
It is detected by a sensor 23 fixed to the bottom end face of the water tank 2 and projected into the washing water, and the detection result is fed back to the air heater 6 to control the heating temperature of the washing water. The rotating drum 3 is provided with an opening 17 on the circumferential side for loading and unloading the laundry, and an input port 25 connected by a bellows 24 is provided in the main body case 1 and the water tank 2 at a position corresponding to the opening 17. It is being This input port 25 is sealed by a lid 26 attached to the main body case 1.

The dehumidifying heat exchanger 7, as shown in FIG.
It consists of a fan 7a and a fin tube 7b, and the fin tube 7b is housed in a heated air circulation path. The fan 7a is attached to one end of a fin tube 7b that projects outward from the circulation path, and the other end of the fin tube 7b projects outside from the circulation path.

FIG. 3 shows an example of the air-cooled dehumidifying heat exchanger 7, but the dehumidifying heat exchanger 7 shown in FIG.
A water-cooled type as shown in may also be used. in this case,
Cooling water is ejected from the ejection pipe 7c protruding into the circulation path, and the warm air after drying is cooled. The water condensed by cooling is discharged together with the cooling water to the outside of the circulation path through the discharge port 7d.

Next, the operation of the above embodiment will be explained. When heating the washing water, the air heater 6, circulation fan 8, circulation pump 14, and drum drive motor 19 are operated. In this operating state, hot air heated by the heater 6 is connected to the space 18 on the end surface side through the supply side duct 9 by the fan 8.

On the other hand, the washing water that has been filled to a predetermined water level in the water tank 2 is sprayed in a shower-like or diffused state from the tip nozzle 16 that passes through the circulation hose 15 and emerges from the hot air outlet by the circulation pump 14. Ru. Therefore, while the washing water is being circulated, it is efficiently heated by the warm air heated by the heater 6.

While the washing water is being heated, the rotating drum 3 is being rotated by the drum drive motor 19, so that the washing water sprayed from the tip nozzle 16 and heated is transferred to the rotating drum 3.
It falls while repeatedly colliding with each end face of the water tank 2. The falling washing water cools the end surface of the water tank 2 that has been heated by the hot air. The laundry items stored in the rotary drum 3 undergo a washing operation in which they are lifted and dropped by projections (not shown) provided in the rotary drum 3.

Therefore, the laundry to be washed is heated not only by the heated hot water but also by the warm air that enters the rotary drum 3 from the space 18 through the small holes 3b provided on the end surface of the rotary drum 3. The stains on the items to be washed are efficiently removed.

After heating the washing water and exchanging heat with the laundry, the hot air is discharged from a large number of small holes 3a provided on the circumferential side of the rotating drum 3, and is then passed through the discharge side duct 10 and the dehumidifying heat exchanger. heater 6 by fan 8 through the connecting duct 11
The heated washing water is then heated to the drying temperature again, and washing with the heated washing water is continued.

When drying the dehydrated laundry,
The air heating heater 6, the dehumidifying heat exchanger 7, the circulation fan 8, and the drum drive motor 19 are operated. In this case, since the washing water is not circulated, the hot air supplied into the rotating drum 3 through the heater 6 generates heat between each surface of the laundry object being stirred in the rotating drum 3. make an exchange,
To efficiently dry laundry items. The hot air containing a large amount of moisture due to drying is dehumidified while passing through the dehumidifying heat exchanger 7, and is raised to a drying temperature by the heater 6, thereby continuing to dry the laundry items.

[0033]

According to the invention as set forth in claim 1, since the tip nozzle of the washing water circulation hose is exposed at the hot air outlet from the air heater, washing water can be simply circulated. The washing water is heated using an air heater,
To efficiently wash laundry items. Moreover, since washing water and drying air can be heated by a single air heater, a safe drum-type washer/dryer that does not cause electrical leakage can be provided at a lower cost than in the conventional case.

According to the second aspect of the invention, the washing nozzle of the washing water circulation hose is structured to spray the washing water in a shower-like or diffused state, so that the washing water is not heated by hot air. Efficiency can be increased.

According to the third aspect of the invention, the dehumidifying heat exchanger is configured to stop operating while the washing water is being heated, so that the dehumidifying and cooling operation is performed while the washing water is being heated. can be prevented.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing one embodiment of a tip nozzle.

FIG. 3 is an enlarged sectional view showing an embodiment of a dehumidifying heat exchanger.

FIG. 4 is a perspective view showing another embodiment of the tip nozzle.

FIG. 5 is a sectional view showing another embodiment of a dehumidifying heat exchanger.

FIG. 6 is a vertical cross-sectional view showing a conventional configuration.

[Explanation of symbols]

1 Main body case 2 Aquarium 3 Rotating drum 3a, 3b Small hole 6 Air heating heater 7 Heat exchanger for dehumidification 8 Circulation fan 11 Connecting duct 14 Circulation pump 15 Circulation hose 16 Tip nozzle 18 Space on the hot air outlet side 19 Drum drive motor

Claims (3)

[Claims] Claim 1: A main body case, a rotating drum with a large number of small holes that doubles as a washing tub and a dehydration tank and is horizontally supported by a water tank inside the main case, a drum drive motor, and a rotating drum inside the main case above the water tank. Heated air circulation means is provided to circulate drying air into the rotating drum, and washing water circulation means is provided to circulate washing water from the bottom of the tank to the top of the tank. an air heating heater connected to the top of the water tank on one end side of the rotary drum, a dehumidifying heat exchanger connected to the top of the water tank on the other end side of the rotating drum, and a connecting duct connecting the heater and the heat exchanger. The washing water circulation means includes a circulation fan connected to the washing water tank, and a circulation hose that connects the bottom of the water tank and the hot air outlet from the air heater; a circulation pump that circulates the washing water through the circulation hose; A drum-type washer/dryer consisting of a tip nozzle that is installed at the tip of a circulation hose and sprays washing water into a space on the hot air blowing side. 2. The drum-type washer/dryer according to claim 1, wherein the tip nozzle is a nozzle that sprays washing water in a shower-like or diffused state. 3. The drum according to claim 1, wherein the dehumidifying heat exchanger is configured to stop operating while the washing water in the water tank is heated by the air that has passed through the heater. Washing dryer.