JP2021087513A - Washing and drying machine - Google Patents

Abstract

To provide a washing and drying machine having improved energy efficiency.SOLUTION: A washing and drying machine 100 comprises a washing tub 9 for accommodating laundry 56, a blower fan 19 for supplying warm air to the washing tub 9 when the laundry 56 is dried, a motor 52 for driving the blower fan 19, and a ventilation duct 22 through which heat generated by the driving motor 52 can be discharged, communicating with the inner part of the washing tub 9 at both of downstream and upstream of the air flow.SELECTED DRAWING: Figure 2

Description

The present invention relates to a washer / dryer.

In response to increasing demand from users, a washer / dryer with a drying function added to the washing machine is known. As a technique relating to a washer / dryer, Patent Document 1 describes a water tank elastically supported in a housing, a rotary tank rotatably provided in the water tank for accommodating clothes, a dehumidifying means for dehumidifying moist air, and the above. A heating means that heats the air dehumidified by the dehumidifying means, an air passage that sequentially connects the heating means, the rotary tank, and the dehumidifying means, and a blowing means that circulates air in the air passage and has a motor. Described is a washer / dryer equipped with the motor so as to be cooled by air guided from a portion higher than the atmospheric pressure in the air passage.

Japanese Unexamined Patent Publication No. 2006-204656 (see particular claim 1)

By the way, in the technique described in Patent Document 1, warm air is supplied to the washing tub by driving a blower. The blower is driven by a motor, which is cooled by air. The air used for cooling is discharged to the outside of the housing. Therefore, the exhaust heat of the motor generated by the power consumption is discharged to the outside as it is, which poses a problem in terms of energy efficiency.

The problem to be solved by the present invention is to provide a washer / dryer with improved energy efficiency.

The washer-dryer of the present invention includes a washing tub for accommodating laundry, a blower fan for supplying warm air to the washing tub when the laundry is dried, a motor for driving the blower fan, and driving of the motor. It is configured to be able to dissipate heat to the air flowing through it, and the downstream side of the air flow is provided with a ventilation path communicating with the inside of the washing tub.

According to the present invention, it is possible to provide a washer / dryer with improved energy efficiency.

It is an external perspective view of the washer-dryer of 1st Embodiment. It is sectional drawing of the washer-dryer of 1st Embodiment. It is a figure explaining the drying mechanism in the washer-dryer of 1st Embodiment. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 3 for explaining the flow of air in the vicinity of the motor. It is a figure explaining the drying mechanism in the washer-dryer of 2nd Embodiment. FIG. 5 is a cross-sectional view taken along the line BB of FIG. 5 and is a diagram for explaining the air flow in the vicinity of the motor. It is a figure explaining the air flow in the vicinity of a motor in the washer-dryer of 3rd Embodiment. It is a figure explaining the air flow in the vicinity of a motor in the washer-dryer of 4th Embodiment. It is sectional drawing of the washing dryer of 5th Embodiment. It is a graph explaining each time change of the temperature and the degree of dryness of the laundry in a drying operation. It is a time chart explaining the time change of the rotation speed of a blower fan, the amount of heat generated by a motor, and the amount of air flowing through a ventilation path.

Hereinafter, embodiments for carrying out the present invention (the present embodiment) will be described. However, the present invention is not limited to the following contents and the illustrated contents, and can be arbitrarily modified and carried out within a range that does not significantly impair the effects of the present invention. The present invention can be implemented by combining different embodiments. In the following description, the same members will be designated by the same reference numerals in different embodiments, and redundant description will be omitted. In addition, the same name is used for those having the same function, and duplicate explanations are omitted. In the cross-sectional view shown below, the hatching may be omitted for simplification of the illustration.

FIG. 1 is an external perspective view of the washer / dryer 100 of the first embodiment. The washer / dryer 100 includes a housing 1 that constitutes an outer shell. A top cover 2 is provided on the upper part of the housing 1. A power switch 5 and a container 28 (see FIG. 2) for containing detergent and finishing agent are provided on the front side of the top cover 2. On the rear side of the top cover 2, parts related to water supply and drying such as a water supply solenoid valve 4, a heating device 20 (see FIG. 2), and a blower fan 19 (see FIG. 2) are built.

The housing 1 is provided with an outer lid 3 so as to cover the loading port 2a (see FIG. 2) of the laundry 56 (see FIG. 2). A handle 3a and an operation panel 8 including an operation switch 6 and a display 7 are provided on the front side of the outer lid 3. By pulling the handle 3a upward, the outer lid 3 is bent and opened at the center as shown by the alternate long and short dash line in FIG. The operation panel 8 is electrically connected to a control device 14 (see FIG. 2) provided at the bottom of the housing 1.

FIG. 2 is a cross-sectional view of the washer / dryer 100 of the first embodiment. The washer / dryer 100 is a vertical washer / dryer in the illustrated example. Since the washer / dryer 100 is a vertical washer / dryer, the motor 52 provided in the vertical washer / dryer can be cooled, although details will be described later.

The washer / dryer 100 includes a washing tub (inner tub) 9, a rotary wing 11 provided at the bottom of the washing tub 9, an outer tub 10 containing the washing tub 9 and storing washing water, a washing tub 9 and a rotary wing. A drive mechanism 50 for rotationally driving the 11 and a drying mechanism 60 for blowing warm air into the washing tub 9 are provided.

The washing tub 9 accommodates laundry 56 such as clothes. The washing tub 9 has a large number of small through holes 9a (only a part of which is shown in FIG. 2) for water passage and ventilation on the outer peripheral wall, and a plurality of through holes 9b for water passage and ventilation on the bottom wall thereof. Be prepared. The washing tub 9 is provided with a fluid balancer 9c at the upper edge. The rotary blade 11 is rotatably provided on the inner bottom portion of the washing tub 9. The thrown laundry 56 is agitated by the rotation of the rotary blade 11. The washing tub 9 and the rotary blade 11 are rotationally driven independently or integrally by a drive mechanism 50 composed of a clutch mechanism 12 and an electric motor 13.

The outer tank 10 is supported by the housing 1 via a shock absorber (not shown). The washing tub 9 is arranged so that the axis of rotation faces the vertical direction. A drive mechanism 50 is attached to the lower part of the outer tank 10. On the outside of the side surface of the outer tub 10, a vibration sensor 27 for detecting the vibration of the outer tub 10 during washing and dehydration is provided. An air trap 21a is provided on the lower rear side of the outer tank 10. The internal pressure of the air trap 21a is transmitted to the water level sensor 21 via the tube 21b. As a result, the water level of the water stored in the outer tank 10 is detected.

A tank cover 31 is provided on the upper surface of the outer tank 10. The tank cover 31 is provided with a charging port 31a in a portion about two-thirds from the front side. The rear surface 31b arranged on the rear side of the tank cover 31 is provided with a first hot air blowing portion 54, a second hot air blowing portion 55c, a water supply inlet (not shown), and a circulating water inlet 33.

The front side of the tank cover 31 is provided with an inlet 28a for supplying the detergent and finishing agent contained in the container 28 to the outer tank 10. The tank cover 31 is provided with an inner lid 23 that opens and closes the inlet 31a. The inner lid 23 is attached to the tank cover 31 via the hinge 23b. By lifting the handle 23a upward, the inner lid 23 is unlocked (not shown), opened as shown by the alternate long and short dash line in the figure, and locked by pushing the handle 23a downward. A circulating water cover 30 is provided below the rear surface 31b of the tank cover 31.

A water passage hole 10b is provided at the rear bottom of the outer tank 10. The water flow vent 10b and the circulating water inlet 33 are connected by a washing water circulation pipe 17. A circulation pump 16 and a foreign matter trap 18 provided at the bottom of the housing 1 are provided in the middle of the circulation pipe 17. A drain hose 24 is connected to the upstream side of the foreign matter trap 18 via a drain valve 15. When the circulation pump 16 is operated, the washing water in the outer tub 10 is sucked downward from the water passage port 10b, passes through the circulation pipe 17, and is pumped up to the upper side of the outer tub 10. The pumped washing water enters the circulating water cover 30 from the circulating water inlet 33, and after the lint is removed by a lint filter (not shown), the washing water is sprinkled into the washing tub 9 from the nozzle 34.

A control device 14 for controlling the operation of the washer / dryer 100 is provided on the rear side of the outer tub 10. The control device 14 controls the washer / dryer 100 so that the operation mode selected by the operation of the operation switch 6 by the user is set. The control device 14 is connected to each device constituting the washer / dryer 100 by an electric signal line (not shown). Although not shown, the control device 14 includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), an HDD (Hard Disk Drive), an I / F (interface), and the like. It is composed of. Then, the control device 14 is embodied by executing a predetermined control program stored in the ROM by the CPU.

The drying mechanism 60 has a function of drying the laundry 56. The drying mechanism 60 will be described with reference to FIG.

FIG. 3 is a diagram illustrating a drying mechanism 60 in the washer / dryer 100 of the first embodiment. The washer / dryer 100 includes a motor 52, a blower fan 19, a heating device 20, and a ventilation passage 22 as a drying mechanism 60. The blower fan 19 and the heating device 20 are arranged in the ventilation passage 22. A dehumidifying mechanism 25 and a lint filter 26 are also arranged in the ventilation passage 22.

The blower fan 19 supplies warm air to the washing tub 9 when the laundry 56 is dried. The blower fan 19 is connected to the motor 52, and the blower fan 19 is driven by the drive of the motor 52. The heating device 20 heats the air flowing through the ventilation passage 22. The heating device 20 utilizes, for example, Joule heat generated by energization. With the heating device 20 configured in this way, air can be heated with a simple device. Specifically, the heating device 20 is, for example, a PTC (Positive Temperature Coefficient) heater.

The ventilation passage 22 is configured so that the heat generated when the motor 52 is driven can be dissipated to the air flowing through the ventilation passage 22. The downstream side of the air flow of the ventilation passage 22 communicates with the inside of the washing tub 9. By configuring the ventilation passage 22 in this way, the heat of the motor 52 generated by driving the blower fan 19 can be dissipated to the air flowing through the ventilation passage 22, although details will be described later. Further, the motor 52 can be cooled by dissipating heat to the air. Then, by supplying the air (warm air) that has received the heat to the washing tub 9, the heat of the motor 52 can be used for drying the laundry 56 (see FIG. 2). The ventilation passage 22 includes, for example, a duct.

The upstream side of the air flow of the ventilation passage 22 also communicates with the inside of the washing tub 9 via the water passage vent 10b (see FIG. 2). As a result, air can be circulated inside and outside the washing tub 9 to improve the efficiency of raising the temperature of the warm air supplied to the laundry 56.

The ventilation passage 22 includes a heating device 20 for heating the flowing air, a first ventilation passage 22a in which the blower fan 19 is arranged, and a second ventilation passage 22b in which the motor 52 is arranged. In the illustrated example, the heat generated when the motor 52 is driven is dissipated to the air flowing through the second ventilation passage 22b. By including the first ventilation passage 22a and the second ventilation passage 22b, the heating device 20 can generate warm air in the first ventilation passage 22a, and the warm air can be generated by the heat of the motor 52 in the second ventilation passage 22b.

The second ventilation passage 22b is configured to branch from the first ventilation passage 22a. That is, the second ventilation passage 22b is connected to the first ventilation passage 22a. By branching the second ventilation passage 22b from the first ventilation passage 22a, the occupied volume of the ventilation passage 22 can be reduced as compared with the case where the first ventilation passage 22a and the second ventilation passage 22b are separately provided in two systems. ..

The second ventilation passage 22b is configured to branch off from the first ventilation passage 22a on the downstream side of the air flow of the blower fan 19 arranged in the first ventilation passage 22a. In the illustrated example, the second ventilation passage 22b branches from the first ventilation passage 22a at a branch portion 24a on the downstream side of the air flow of the blower fan 19. By branching the second ventilation passage 22b on the downstream side of the air flow of the blower fan 19, air can be circulated to the second ventilation passage 22b by utilizing the high wind pressure on the downstream side of the blower fan 19.

The thickness of the second ventilation passage 22b is not particularly limited, but can be determined in consideration of the amount of warm air blown from the first hot air blowing portion 54 and the ease of air flow in the second ventilation passage 22b. That is, by making the second ventilation passage 22b thicker, air can easily flow through the second ventilation passage 22b. On the other hand, by narrowing the second ventilation passage 22b, the air volume of the second ventilation passage 22b can be reduced, and the amount of warm air blown from the first warm air blowing portion 54 can be increased. Therefore, the thickness of the second ventilation passage 22b may be determined in consideration of these points.

Further, the second ventilation passage 22b is configured to branch from the first ventilation passage 22a on the upstream side of the air flow of the heating device 20 arranged in the first ventilation passage 22a. In the illustrated example, the second ventilation passage 22b branches from the first ventilation passage 22a at the branch portion 24a on the upstream side of the air flow of the heating device 20. By branching the second ventilation passage 22b on the upstream side of the air flow of the heating device 20, the air before heating by the heating device 20 can come into contact with the motor 52, and heat dissipation to the motor 52 can be promoted.

FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3 and is a diagram for explaining the air flow in the vicinity of the motor 52. At least a part of the motor 52 is exposed to the ventilation passage 22 (the second ventilation passage 22b in the illustrated example). Therefore, the air flowing through the ventilation passage 22 comes into contact with the motor 52. Thereby, the air can be heated by the heat of the motor 52 and the motor 52 can be cooled by the air.

The washer / dryer 100 includes an air-cooled jacket 55 that brings air into contact with the motor 52. The air-cooled jacket 55 is configured to dissipate the heat of the motor 52 to the air by allowing air to flow inside the air-cooled jacket 55. By providing the air-cooled jacket 55, heat exchange between the motor 52 and the air can be promoted.

At one end of the second ventilation passage 22b, a branch portion 24a with the first ventilation passage 22a is formed. A second warm air blowing portion 55c is formed at the other end of the second ventilation passage 22b. That is, the second ventilation passage 22b opens into the washing tub 9 via the second warm air blowout 55c. Since the second ventilation passage 22b opens into the washing tub 9, the inside of the washing tub 9 is normally at atmospheric pressure. Therefore, air from the high-pressure branch portion 24a to the inside of the washing tub 9 at atmospheric pressure due to the difference in pressure. Can be distributed.

The air flowing through the second ventilation passage 22b through the branch portion 24a is taken into the air cooling jacket 55 arranged along the side surface of the motor 52. The taken-in air comes into contact with the motor 52 while flowing along the side surface of the motor 52, and the heat of the motor 52 is dissipated to the air. As a result, the air is heated to generate warm air and the motor 52 is cooled. The generated warm air is supplied to the washing tub 9 (see FIG. 2) via the second ventilation passage 22b and the second warm air blowout 55c.

Returning to FIG. 3, the dehumidifying mechanism 25 dehumidifies the air flowing through the ventilation passage 22, and includes a sprinkler pipe 25a and a wall surface 25b. The dehumidifying mechanism 25 is a water-cooled type in the illustrated example. The air is cooled by bringing the water L sprinkled from the sprinkler pipe 25a to the wall surface 25b into contact with the air, and the moisture in the air is condensed on the wall surface 25b to generate condensed water (not shown). This dehumidifies the air.

The lint filter 26 is arranged on the upstream side of the air flow of the blower fan 19 and removes foreign matter in the air. The lint filter 26 is arranged so as to block the fan inlet 19a.

After the washing operation (including the rinsing operation) in the washer / dryer 100 is completed, the laundry 56 housed in the washing tub 9 remains wet. Therefore, a drying operation is performed to dry the wet laundry 56.

During the drying operation, the control device 14 (see FIG. 2) operates the blower fan 19. As a result, the air in the washing tub 9 is sucked into the ventilation passage 22 from the water passage vent 10b. The control device 14 controls the motor 52 so that the rotation speed of the blower fan 19 becomes constant. When the control device 14 further energizes the heating device 20 while operating the blower fan 19, the air flowing through the ventilation passage 22 (first ventilation passage 22a) is heated. As a result, warm air is blown into the washing tub 9 through the first warm air blowing portion 54, the laundry 56 is warmed, and the water content of the laundry 56 evaporates. During drying, the control device 14 may appropriately rotate the rotor blades 11 to loosen the laundry 56. As a result, it is possible to prevent the laundry 56 from drying locally.

The hot and humid air passes through the through hole 9a (see FIG. 2), exits the outer tank 10, and is sucked into the ventilation passage 22 through the water passage port 10b. The sucked air is cooled and dehumidified by the dehumidifying mechanism 25 to become dry low-temperature air. The dry low-temperature air flows through the first ventilation passage 22a, is reheated by the heating device 20, and is blown into the washing tub 9 again. Therefore, the air circulates inside and outside the washing tub 9.

When blowing warm air into the washing tub 9, it is preferable to blow warm air having a large air volume and a high wind speed in order to dry the laundry 56 and achieve a good finish. Therefore, in the washer / dryer 100, the rotation speed of the blower fan 19 is driven at a high speed. Therefore, the output of the motor 52 that drives the blower fan 19 also increases, and the amount of heat generated by the motor 52 also increases. Therefore, from the viewpoint of stable driving, it is preferable to cool the motor 52.

Therefore, in the present embodiment, a part of the air boosted by the blower fan 19 is guided to the air-cooled jacket 55 by the second ventilation passage 22b, and the motor 52 is cooled by the air. The air heated by the heat of the motor 52 (that is, warm air) is discharged into the washing tub 9 via the second ventilation passage 22b and the second warm air blowing portion 55c. The discharged warm air is heated by the heat of the motor 52 to raise the temperature. Therefore, the drying of the laundry 56 can be promoted, the drying efficiency is improved, and the power consumption can be reduced. This can improve energy efficiency. Further, by cooling the motor 52, the reliability of the motor 52 can be improved.

FIG. 5 is a diagram illustrating a drying mechanism 61 in the washer / dryer 101 of the second embodiment. The washer / dryer 101 has the same configuration as the washer / dryer 100 except that a drying mechanism 61 is provided in place of the drying mechanism 60 of the washer / dryer 100.

In the drying mechanism 60, the motor 52 is arranged above the blower fan 19, and the motor 52 is a part of the air flowing through the first ventilation passage 22a (air flowing through the second ventilation passage 22b branched from the first ventilation passage 22a). ) Was in contact. However, in the drying mechanism 61 of the washer / dryer 101, the motor 52 is arranged below the blower fan 19. Then, almost all (or all) of the motor 52 is exposed to the ventilation passage 22, and the motor 52 comes into contact with all of the air flowing through the ventilation passage 22.

During the drying operation, the air dehumidified by the dehumidifying mechanism 25 flows through the ventilation passage 22 while contacting the side surface of the motor 52 exposed to the ventilation passage 22. When flowing on the side surface of the motor 52, the air comes into contact with the motor 52 to heat the air and cool the motor 52. The flow of air after heating will be described with reference to FIG.

FIG. 6 is a cross-sectional view taken along the line BB of FIG. 5 and is a diagram for explaining the air flow in the vicinity of the motor 52. The air heated by the contact with the motor 52 changes its flow upward (see also FIG. 5), flows through the ventilation passage 22, and reaches the fan inlet 19a. Then, the air that has passed through the fan inlet 19a is boosted by the blower fan 19 and then heated to a temperature required for drying by the heating device 20. The heated air is supplied to the washing tub 9 via the first warm air blowing unit 54.

As described above, even when the relative positional relationship between the motor 52 and the blower fan 19 is different from that of the first embodiment, the air can be heated and the motor 52 can be cooled. By heating the air with the heat of the motor 52, the drying of the laundry 56 (see FIG. 3) can be promoted, and the drying efficiency is improved, so that the power consumption can be reduced. This can improve energy efficiency. Further, by cooling the motor 52, the reliability of the motor 52 can be improved.

When the motor 52 and the blower fan 19 are installed side by side in the horizontal direction, the structure of either the first embodiment or the second embodiment can be appropriately adopted depending on the structure of the washer / dryer.

FIG. 7 is a diagram illustrating an air flow in the vicinity of the motor 52 in the washer / dryer 102 of the third embodiment. The washer / dryer 102 has the same configuration as the washer / dryer 100 except that a drying mechanism 62 is provided in place of the drying mechanism 60 of the washer / dryer 100.

In the washer / dryer 102, a plurality of second ventilation passages 22b are arranged. In the illustrated example, the second ventilation passage 22b of two systems (three systems or more) is branched from the first ventilation passage 22a at the branch portion 24a as in the first embodiment, and further, the branch portion 24b is also the first. It branches off from the ventilation path 22a. The second ventilation passages 22b of the plurality of systems are supplied to the air-cooled jacket 55 in the same manner as in the first embodiment (see FIG. 4) provided with only one system, and come into contact with the motor 52 in the air-cooled jacket 55. Inside the air-cooled jacket 55, the second ventilation passages 22b of a plurality of systems may be merged, but in the illustrated example, they are not merged and are independent systems. Therefore, the air heated by the contact with the motor 52 is supplied to the washing tub 9 via the second warm air blowing portions 55c and 55d.

By arranging a plurality of the second ventilation passages 22b, even if a part of the second ventilation passages 22b is blocked by dust or the like, the remaining second ventilation passages 22b can bring air into contact with the motor 52. As a result, the air flowing through the second ventilation passage 22b can be heated and the motor 52 can be cooled by the flowing air. By heating the air with the heat of the motor 52, the drying of the laundry 56 (see FIG. 3) can be promoted, and the drying efficiency is improved, so that the power consumption can be reduced. This can improve energy efficiency. Further, by cooling the motor 52, the reliability of the motor 52 can be improved.

FIG. 8 is a diagram illustrating an air flow in the vicinity of the motor 52 in the washer / dryer 103 of the fourth embodiment. The washer / dryer 102 has the same configuration as the washer / dryer 100 except that a drying mechanism 63 is provided in place of the drying mechanism 60 of the washer / dryer 100.

The washer / dryer 103 includes a heat transfer member 53 thermally connected to the motor 52. The heat transfer member 53 is, for example, a heat pipe. The motor 52 is not exposed to the ventilation passage 22, and the motor 52 is arranged apart from the ventilation passage 22. The heat transfer member 53 is exposed in the ventilation passage 22. Therefore, the heat generated by the motor 52 is dissipated to the air flowing through the ventilation passage 22 through the heat transfer member 53.

The heat radiating portion of the heat transfer member 53 is, for example, the upstream side of the air flow of the heating device 20. By radiating heat at this portion, heat can be radiated to the cold air before heating by the heating device 20, and heat radiating can be promoted.

By providing the heat transfer member 53, even when the motor 52 cannot be exposed to the air passage 22, the heat of the motor 52 can be dissipated to the air flowing through the air passage 22 through the heat transfer member 53.

FIG. 9 is a cross-sectional view of the washer / dryer 104 of the fifth embodiment. The washer / dryer 104 has the same configuration as the washer / dryer 100 except that the control device 74 is provided in place of the control device 14 of the washer / dryer 100 (see FIG. 2). The control device 74 is connected to each device constituting the washer / dryer 104 by an electric signal line (not shown). Like the control device 14, the control device 74 includes, for example, a CPU, a RAM, a ROM, an HDD, an I / F, and the like, although none of them are shown. The control device 74 is embodied by the CPU executing a predetermined control program stored in the ROM.

Since the control device 14 controls the rotation speed of the blower fan 19 to be constant, the air volume is constant. However, the control device 74 controls the rotation speed of the blower fan 19 based on the dryness of the laundry 56. Therefore, in the washer / dryer 104, the rotation speed of the blower fan 19 changes based on the degree of dryness of the laundry 56. The degree of dryness referred to here is synonymous with the degree of dryness specified in JIS C 9608: 1993, and the mass of the laundry 56 before drying (laundry 56 before washing (before getting wet)) is used as the degree of drying. It is a value obtained by dividing by the mass of the laundry 56 (the wet laundry 56) at the time to be measured. The significance of controlling the rotation speed of the blower fan 19 based on the degree of dryness will be described with reference to FIG.

FIG. 10 is a graph illustrating each time change of the temperature and the degree of dryness of the laundry 56 in the drying operation. In FIG. 10, the graph shown by the solid line represents the temperature of the laundry 56, and the graph shown by the broken line is a graph showing the degree of dryness of the laundry 56. It is assumed that the drying operation is started at time 0 by supplying warm air having a temperature T2 to the washing tub 9.

Preheating is performed to raise the temperature of the laundry 56 until the time t1 corresponding to the initial stage of drying. At the preheating stage, the heat supplied to the laundry 56 is mainly used for raising the temperature of the laundry 56, and is hardly used for the evaporation of the water contained in the laundry 56. Therefore, the temperature of the laundry 56 rises significantly to the temperature T1 between the time 0 and t1, but the degree of dryness only gradually changes from 0% to D1.

When the temperature rises to some extent between time 0 and t1, the amount of water evaporated from the laundry 56 begins to increase at time t1, and the laundry 56 begins to dry. Therefore, during constant drying from time t1 to time t2, the degree of drying greatly increases from D1 to D2. On the other hand, the amount of heat and the amount of heat of vaporization are balanced, and the temperature of the laundry 56 becomes almost constant (temperature T1).

At time t2, when the water content of the laundry 56 decreases, the amount of evaporation decreases, so that the heat of vaporization decreases. Therefore, the temperature of the laundry 56 rises significantly again during the rate-reducing drying after the time t2. On the other hand, the degree of dryness gradually increases from D2. Then, at time t3, when the moisture of the laundry 56 is exhausted (dryness is 100%), the temperature of the laundry 56 coincides with the temperature T2 of the warm air, and the drying operation ends.

When the laundry 56 contains a large amount of water, the laundry 56 is less likely to wrinkle, and even if it does, it can be easily stretched. However, when the laundry 56 begins to dry, the wrinkles, if wrinkled, begin to fix. Therefore, if the drying progresses further, the wrinkles are completely fixed and it becomes difficult to correct the wrinkles. Therefore, it is preferable to blow, for example, a large amount of air onto the laundry 56 before the degree of drying reaches a predetermined value to the extent that wrinkles can be removed, and to sufficiently smooth out the wrinkles of the laundry 56 before starting to dry. ..

Therefore, in the washer / dryer 104, in order to represent a predetermined value of the degree of dryness that can remove wrinkles, the air is blown based on a predetermined reference value of the degree of dryness that can be determined that the laundry 56 is sufficiently moist. The rotation speed of the fan 19 is controlled. Specifically, the control device 74 (see FIG. 9) sets the rotation speed of the blower fan 19 when the degree of drying is equal to or less than a predetermined reference value D1 at which it can be determined that the laundry 56 is sufficiently moist after the start of drying. When it is controlled to N1 and it can be determined that the laundry 56 has started to dry by exceeding the predetermined reference value D1, the rotation speed of the blower fan 19 is controlled to N2, which is larger than N1. The predetermined reference value is not limited to D1 as long as it can be determined that the laundry 56 is sufficiently moist. For example, an arbitrary degree of dryness during preheating before time t1 or a constant after time t1. It may be any degree of dryness during rate drying.

FIG. 11 is a time chart for explaining the time change of the rotation speed of the blower fan 19, the amount of heat generated by the motor 52, and the amount of air flowing through the ventilation passage 22. From time 0 to t1, the heat given to the laundry 56 as described above is used for raising the temperature, and the moisture hardly evaporates (that is, the degree of dryness gradually increases). Therefore, it can be determined that the laundry 56 is sufficiently moist until the degree of dryness D1 at time t1. However, after time t1, the evaporation of water begins to progress (that is, the degree of dryness increases significantly), and wrinkles are easily fixed in the portion where the dryness begins. Therefore, in the illustrated example, the rotation speed of the blower fan 19 is controlled to N1 until the time t1, and when the dryness reaches D1 at the time t1, the rotation speed of the blower fan 19 is controlled to N2, which is larger than N1. Will be done.

By controlling the rotation speed from N1 to N2, the calorific value of the motor 52 increases from H1 to H2. Therefore, it is preferable to increase the air volume of the air used for cooling the motor 52. Here, as the rotation speed of the fan increases, the wind pressure of the branch portion 24a (see FIG. 3) on the downstream side of the blower fan 19 increases. Therefore, the pressure difference between the pressure of the branch portion 24a and the pressure of the washing tub 9 which is normally atmospheric pressure becomes large, and the air volume in the second ventilation passage 22b increases from F1 to F2. As a result, even if the heat generation amount of the motor 52 increases, the air volume also increases due to the increase in the rotation speed, so that the motor 52 can be sufficiently cooled. Further, since the increased amount of heat is further supplied to the washing tub 9, the time until the completion of drying can be shortened.

According to the washer / dryer 104 provided with the control device 74, it is possible to achieve both improvement in energy efficiency and improvement in reliability of the motor 52, and further, it is possible to perform a drying operation capable of performing a good finish with less wrinkles. ..

1 Housing 10 Outer tank 100, 101, 102, 103, 104 Washer / dryer 10b Water flow vent 11 Rotating blade 12 Clutch mechanism 13 Electric motor 14,74 Control device 15 Drain valve 16 Circulation pump 17 Circulation pipe 18 Foreign matter trap 19 Blower Fan 19a Fan inlet 2 Top cover 20 Heating device 21 Water level sensor 21a Air trap 21b Tube 22 Ventilation passage 22a First ventilation passage 22b Second ventilation passage 23 Inner lid 23a, 3a Handle 23b Hinge 24 Drain hose 24a Branch part 24b Branch part 25 Dehumidifying mechanism 25a Sprinkler pipe 25b Wall surface 26 Lint filter 27 Vibration sensor 28 Container 28a Inlet 2a, 31a Input port 3 Outer lid 30 Circulating water cover 31 Tank cover 31b Rear surface 33 Circulating water inlet 34 Nozzle 4 Water supply electromagnetic valve 5 Power switch 5 Drive mechanism 52 Motor 53 Heat transfer member 54 1st hot air blowing part 55 Air cooling jacket 55c, 55d 2nd hot air blowing part 56 Laundry 6 Operation switch 60, 61, 62, 63, 64 Drying mechanism 7 Display 8 Operation panel 9 Washing Tanks 9a, 9b Through holes 9c Fluid balancer D1, D2 Dryness F1, F2 Air volume L Water H1, H2 Calorie N1, N2 Rotation speed T1, T2 Temperature t1, t2 Time

Claims (15)

A washing tub that houses laundry and
When the laundry is dried, a blower fan that supplies warm air to the washing tub and
The motor that drives the blower fan and
A washer / dryer that is configured to dissipate heat generated when the motor is driven to the flowing air, and has a ventilation path that communicates with the inside of the washing tub on the downstream side of the air flow. The washer / dryer according to claim 1, wherein the upstream side of the air flow of the ventilation passage also communicates with the inside of the washing tub. The ventilation path
A heating device that heats the flowing air, a first ventilation path in which the blower fan is arranged, and
The washer / dryer according to claim 1 or 2, which includes a second ventilation passage in which the motor is arranged. The washer / dryer according to claim 3, wherein the second ventilation passage is formed by branching from the first ventilation passage. The washer / dryer according to claim 4, wherein the second ventilation passage is formed by branching from the first ventilation passage on the downstream side of the air flow of the blower fan arranged in the first ventilation passage. The washer / dryer according to claim 5, wherein the second ventilation path opens into the washing tub. The second ventilation passage is according to any one of claims 4 to 6, wherein the second ventilation passage is formed by branching from the first ventilation passage on the upstream side of the air flow of the heating device arranged in the first ventilation passage. Washing and drying machine. The washer / dryer according to claim 3, wherein the heating device utilizes Joule heat generated by energization. The washer / dryer according to claim 3, wherein a plurality of the second ventilation passages are arranged. The washer / dryer according to claim 1 or 2, wherein at least a part of the motor is exposed to a ventilation path. A heat transfer member connected to the motor is provided.
The washer / dryer according to claim 1 or 2, wherein the motor is arranged apart from the ventilation passage, and the heat transfer member is exposed in the ventilation passage. Equipped with an air-cooled jacket that brings air into contact with the motor.
The washer / dryer according to claim 1 or 2, wherein the air-cooled jacket is configured to dissipate heat of the motor to air by flowing air inside the air-cooled jacket. The washer / dryer according to claim 1 or 2, which is a vertical washer / dryer. The washer / dryer according to claim 1 or 2, further comprising a control device that controls the rotation speed of the blower fan based on the degree of dryness of the laundry. After the start of drying, the control device
When the degree of dryness is equal to or less than a predetermined reference value at which it can be determined that the laundry is sufficiently moist, the rotation speed of the blower fan is controlled to N1.
The washer / dryer according to claim 14, wherein when it can be determined that the laundry has begun to dry when the value exceeds the predetermined reference value, the rotation speed of the blower fan is controlled to N2, which is larger than N1.

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