JP2678523B2 - Drum type washer / dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a drum type washer / dryer for home use and commercial use, which performs washing to drying in the same drum, and to improve its drying performance. The present invention relates to improvement of a heat converter for dehumidification.

<Prior Art> Generally, as shown in FIG. 4, a drum type washer / dryer is arranged outside the drum 1 and a drum 1 having small holes 1a and 1b for exhausting hot air for dehydration and drying on a circumferential surface. The water tank 2 is hung from the outer tank 4 by the spring 3, and the drum 1 is mounted on the lower portion of the water tank 2 by a motor 5
Is rotated via the pulley 6. Also, aquarium 2
Is provided with a water supply valve 7 at the upper part and a drain valve 8 at the lower part.

On the other hand, the drying device includes a heater 9 and a blower (not shown).

In the above structure, the laundry clothes are put into the drum 1 together with the detergent, and the water supplied from the water supply valve 7 is added to the clothes for washing.

Washing is performed by the impact force of the operation of rotating the drum 1 at a low speed, lifting and dropping clothes (hereinafter referred to as tumbling). When the washing is completed, the drain valve 8 is opened, the dirty detergent liquid is discharged, and the process proceeds to rinsing.

And, for dehydration, after washing (rinsing) water is drained,
Drum 1 is rotated at a high speed of 500 to 1000 rpm, and water is scattered by centrifugal force. The moisture contained in the clothes is discharged from the small holes 1a and 1b to the outside of the drum 1, moves downward by connecting the inner wall of the water tank 2, and is discharged to the outside of the machine through the drain valve 8.

Further, as in the case of washing, the drying is performed by rotating the drum 1 at a low speed to circulate the clothes while circulating warm air. That is, blower → heater → water tank → drum → water tank →
Warm air is circulated in the order of a blower, and water is condensed on the wall surface of the water tank 2 cooled by water from a cooling nozzle (not shown) at the bottom of the water tank 2 and the drain hose 10 to be removed and dried. Done.

<Problems to be Solved by the Invention> However, in the conventional drum type washer / dryer, the blower is smaller than the dedicated dryer (the amount of blown air is small), and the heat exchanger for dehumidification also has a lower wall surface of the water tank 2. Since it is used, the drying ability is insufficient, it takes a long time to dry, the drying capacity is small, and the uneven drying is large.

Further, since the amount of air blown is small, it is necessary to raise the temperature of the circulating air to give a necessary amount of heat, which may damage clothes.

In view of the above, the present invention increases the circulating air volume by the blower, and by providing a dedicated heat exchanger for dehumidification to improve the cooling capacity, a high dehumidification rate at low cost,
It is an object of the present invention to provide a drum type washer / dryer capable of realizing a drying ability, shortening a drying time, and easily controlling a temperature of circulating hot air.

<Means for Solving the Problem> (1) The means for solving the problem according to claim 1 of the present invention is, as shown in FIGS. 1 to 4, an outer tub 4 and an elastically suspended suspension in the outer tub 4. A water tank 2, a laundry storage drum 1 that is rotatably supported in the water tank 2 and has a large number of small holes 1a and 1b for ventilation and ventilation in its peripheral wall, and the laundry in the drum 1 is dried. In the drum type washer / dryer equipped with the drying device 20, the drying device 20 heats the laundry in the drum 1 to evaporate moisture, and the warm air from the heater 9 is applied to the drum 1 A blower 21 for blowing the air inside and the small holes 1a, 1
A heat exchanger 22 for dehumidification that cools the steam of the laundry discharged from b to the outside of the drum 1 to condense the water, and a filter 23 that removes dust and the like of the laundry discharged together with the steam to the outside of the drum 1. The heat exchanger 22 is of a type in which cooling water is sprayed into the cooling duct 28 so as to be in direct contact with the warm air from the drum 1, and is arranged immediately before the suction side of the blower 21. It is a thing.

(2) Further, in the problem solving means according to claim 2, in the heat exchanger 22, a water spray nozzle 29 is provided in the cooling duct 28, and cooling water and condensed water are supplied from a lower portion of the cooling duct 28. It is configured to discharge.

(3) Further, in the problem solving means according to claim 3, the auxiliary fin 30 is provided on the suction side of the blower 21 in the cooling duct 28 of the heat exchanger 22 and on the downstream side of the water spray nozzle 29. It is a thing.

<Operation> In the above problem solving means, as shown in FIG.
-> Water tank 2-> drum 1-> water tank 2-> filter 23-> dehumidifying heat exchanger 22-> blower 21-> heater 9 is dried by repeating the cycle.

At this time, according to claim 1, the dehumidifying heat exchanger 22 is connected to the blower 21.
By arranging just before the suction side of, since not only latent heat exchange but also sensible heat is partially exchanged, the temperature of the air entering the blower 21 becomes low, and it becomes easy to select the material such as the fan of the blower 21, The reliability of the blower motor is also improved, and the amount of blown air can be increased.

As described above, by increasing the air flow rate of the blower 21, the contact between the clothes in the drum 1 and the cooling water in the dehumidifying heat exchanger 22 and the hot air is increased, and the drying performance is improved. It

In the second aspect, the heat exchanger 22 for dehumidification is composed of the water spray nozzle 29 and the cooling duct 28 and is water-cooled, so that the structure of the heat exchanger is simplified and the cost is low. High dehumidification rate and high drying capacity can be realized.

Further, in claim 3, an auxiliary fin 30 is provided in the cooling duct 28 of the dehumidifying heat exchanger 22 on the suction side of the blower 21 and on the downstream side of the water spray nozzle 29, and the contact area with the hot and humid air is provided. The heat exchange capacity of the heat exchanger 22 is improved by increasing the value.

In this way, if the heat exchange capacity of the dehumidifying heat exchanger 22 is improved, the cooling / dehumidifying effect is increased, the amount of cooling water can be reduced, and the speed of discharging moisture contained in clothes to the outside of the machine is increased. Time is reduced.

<Embodiment> An embodiment of the present invention will be described below with reference to FIGS.

1 is a view showing the structure of a heat exchanger for dehumidification of a drum type washer / dryer according to an embodiment of the present invention, FIG. 2 is a perspective view of the auxiliary fin thereof, and FIG. 3 is a drying cycle thereof. FIG. 4 is a schematic diagram showing the drum type washer / dryer.

In the drum type washer / dryer of this embodiment, washing and drying are performed in the same drum.
And a water tub 2 elastically suspended in the outer tub 4, and a laundry having a large number of small holes 1a, 1b for rotatably supporting the water in the water tub 2 on its peripheral wall for water and ventilation. Housing drum 1
And a drying device 20 for drying the laundry in the drum 1.

The structures of the drum 1, the water tank 2 and the outer tank 4 are as follows.
The description is omitted because it is the same as the conventional technique, and the structure of the drying device 20 will be mainly described below.

The drying device 20 reduces the pressure loss in the ventilation path,
Unitized so that it can be placed in a limited space,
It is attached to the top of the aquarium 2. And the drying device 20
As shown in FIG. 3, a heater 9 for heating laundry in the drum 1 to evaporate water, a blower 21 for blowing warm air from the heater 9 into the drum 1, and the small holes 1a, 1b. A heat exchanger 22 for dehumidification that cools the steam of the laundry discharged from the drum 1 to the outside and condenses the moisture, and a filter 23 that removes dust and the like of the laundry discharged together with the steam to the outside of the drum 1. It consists of Further, as shown in FIG. 1, the hot air suction port is connected to the water tank 2 by the duct 24, and the hot air discharge port is connected to the water tank 2 by the ducts 25 and 26.

As shown in FIG. 4, the heater 9 is installed inside the duct 24, and the blower 21 is arranged behind the heater 9.

The dehumidifying heat exchanger 22 is of a water cooling type (direct contact type), and as shown in FIG. 1, a cooling duct 28 and a water spray nozzle 29.
It is configured to be attached to the suction port of the blower 21. Further, the cooling water and the condensed water are discharged from the lower part of the cooling duct 28 to the outside of the machine. The cooling water discharge hose is connected to the discharge hose 10 without the drain valve 8. Further, in order to improve the cooling capacity, an auxiliary fin 30 is added to the warm air circulation path inside the cooling duct 28. This auxiliary fin 30 is made of stainless steel (SUS3
It can be processed with a metal such as 04) or molded with a resin such as polypropylene.

The filter 23 is installed in a duct 26 as shown in FIG.

Next, the drying operation will be described with reference to FIGS. 3 and 4.

In FIG. 3, the arrow → indicates the flow of drying air.
That is, the air heated by the heater 9 is supplied to the duct 24.
It is blown into the aquarium 2 via.

This high-temperature air enters the drum 1 through the small hole 1b on the left side surface of the drum 1, heats the clothes to evaporate moisture, and is discharged to the outside of the drum 1 through the small hole 1a on the peripheral surface. Then drum 1
Through the diametrical gap between the water tank 2 and the water tank 2, and from duct 25 to duct 26
Guided to the inner filter 23. Then, a filter 23 removes cotton dust and the like from the clothes, reaches the dehumidifying heat exchanger 22, and is cooled and condensed.

Air immediately after being discharged from the aquarium 2 (duct 25 to duct
The position of the filter 23 in 26) is in a high temperature and high humidity state, but after passing through the dehumidifying heat exchanger 22, it is dehumidified and the humidity is lowered.

The dehumidification amount is obtained by multiplying the absolute temperature difference between the air at these two places by the air volume, and is the moisture content taken from the clothes.

The above cycle is schematically shown in FIG. 3, which is heater 9 → water tank 2 → drum 1 → water tank 2 → filter 23.
-> Dehumidifying heat exchanger 22-> Blower 21-> Heater 9 is repeated to perform drying.

At this time, by disposing the heat exchanger 22 for dehumidification on the suction side of the blower 21, not only latent heat exchange but also sensible heat is partially exchanged, so that the temperature of the air entering the blower 21 becomes low. Therefore, the material of the fan of the blower 21 can be easily selected, the reliability of the blower motor is improved, and the amount of blown air can be increased.

As described above, by increasing the air flow rate of the blower 21, the contact between the clothes in the drum 1 and the cooling water in the dehumidifying heat exchanger 22 and the hot air is increased, and the drying performance is improved. It

In addition, the heat exchanger 22 for dehumidification is composed of the water spray nozzle 29 and the cooling duct 28 and is of the water cooling type (direct contact type), so that the structure of the heat exchanger is simplified and the cost is reduced. High dehumidification rate and high drying capacity can be realized.

Further, an auxiliary fin 30 is provided on the suction side of the blower 21 in the cooling duct 28 of the dehumidifying heat exchanger 22 and on the downstream side of the water spray nozzle 29 to increase the contact area with the hot and humid air. Thus, the heat exchange capacity of the heat exchanger 22 is improved.

In this way, if the heat exchange capacity of the dehumidifying heat exchanger 22 is improved, the cooling / dehumidifying effect is increased, the amount of cooling water can be reduced, and the speed of discharging moisture contained in clothes to the outside of the machine is increased. Time is reduced.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made to the above-described embodiment within the scope of the present invention.

<Effect of the Invention> As is apparent from the above description, according to claim 1 of the present invention, by disposing the dehumidifying heat exchanger immediately before the suction side of the blower, not only latent heat exchange but also sensible heat is partially exchanged. Because
The temperature of the air entering the blower becomes low, the material of the fan of the blower and the like can be easily selected, the reliability of the blower motor is improved, and the amount of blown air can be increased.

By increasing the amount of air blown by the blower in this manner, the contact between the clothes in the drum and the cooling water in the water-cooling type dehumidifying heat exchanger and the hot air is increased, and the drying performance is improved.

Further, according to claims 1 and 2, the heat exchanger for dehumidification has a method of spraying cooling water from the water spray nozzle into the cooling duct to directly contact the hot air from the drum, thereby exchanging heat. The structure of the vessel becomes simple, and high dehumidification rate and drying capacity can be realized at low cost. Moreover, since the cooling water and condensed water are discharged from the lower part of the cooling duct, it is also possible to discharge the cotton dust that has entered the cooling duct and collect in the cooling duct. In addition, it is possible to prevent a decrease in heat exchange capacity.

Further, according to claim 3, an auxiliary fin is provided in the cooling duct of the dehumidifying heat exchanger on the suction side of the blower and on the downstream side of the water spray nozzle to increase the contact area with the hot and humid air. As a result, the heat exchange capacity of the heat exchanger is improved.

In this way, when the heat exchange capacity of the dehumidifying heat exchanger is improved, the cooling / dehumidifying effect is increased, the amount of cooling water can be reduced, and the speed of discharging the moisture contained in clothes out of the machine is increased. Is shortened.

[Brief description of the drawings]

1 is a view showing the structure of a heat exchanger for dehumidification of a drum type washer / dryer according to an embodiment of the present invention, FIG. 2 is a perspective view of the auxiliary fin thereof, and FIG. 3 is a drying cycle thereof. FIG. 4 is a schematic view showing a drum type washer / dryer. 1: Drum, 1a, 1b: Small hole, 2: Water tank, 4: Outer tank, 9: Heater, 2
0: Drying device, 21: Blower, 22: Dehumidifying heat exchanger, 23: Filter, 28: Cooling duct, 29: Water spray nozzle, 30: Auxiliary fin.

 ─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-2-265591 (JP, A) JP-A-2-45094 (JP, A) JP-A 1-218493 (JP, A) JP-A-55- 78996 (JP, A) JP 58-12686 (JP, A) Actually opened 49-135866 (JP, U) Actually opened 61-137394 (JP, U) Actually opened 58-794 (JP, U) Actually open 64-14398 (JP, U) Actually open 61-174586 (JP, U) Actually open 2-86491 (JP, U) Actually open 49-87189 (JP, U)

Claims (3)

(57) [Claims] 1. A laundry including an outer tub, a water tub elastically suspended in the outer tub, and a plurality of small holes for water and ventilation in a peripheral wall of the water rotatably supported in the water tub. In a drum type washer / dryer including a storage drum and a drying device for drying the laundry in the drum, the drying device includes a heater for heating the laundry in the drum to evaporate moisture, and the heater. Blower that blows warm air from the inside of the drum, a heat exchanger for dehumidification that cools the steam of the laundry discharged from the small holes to the outside of the drum and condenses the water, and discharges it together with the steam to the outside of the drum. The heat exchanger comprises a filter for removing dust and the like of the washed laundry, and the heat exchanger is of a system in which cooling water is sprayed into a cooling duct to directly contact with warm air from the drum, and the blower is provided. That it was placed just before the suction side of the vessel Drum-type washing and drying machine according to symptoms. 2. The heat exchanger has a structure in which a water spray nozzle is provided in a cooling duct, and cooling water and condensed water are discharged from a lower portion of the cooling duct. The drum type washer / dryer described. 3. The drum type washing machine according to claim 1, wherein an auxiliary fin is provided in the cooling duct on the suction side of the blower and on the downstream side of the water spray nozzle.