JP2005152193A - Laundry washer/dryer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laundry washer/dryer capable of efficiently drying clothes in shorter time without enlarging device. <P>SOLUTION: The laundry washer/dryer comprises a water tank 2, a rotary drum 3, an air heater 10, a circulation fan 9, and an optical heater unit 20. The rotary drum 3 is rotatably supported inside the water tank 2, and has an opening and an outer peripheral wall face. The air heater 10 is for heating air. The circulation fan 9 is for feeding air heated by the air heater 10 into the rotary drum 3 through the opening of the rotary drum 3. The optical heater unit 20 is for radiating light toward the outer peripheral wall face of the rotary drum 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates generally to a washing and drying machine, and more particularly to a washing and drying machine that performs washing to drying of an object to be washed in a rotating drum, and more specifically, a drying function in the washing and drying machine. It is about improvement.

  Conventional laundry dryers generally have a structure in which hot air is supplied into a laundry drum to dry the laundry and the evaporated water is condensed by a cooler. In such a washing and drying machine, there is a problem that drying efficiency is poor because hot air is not uniformly applied to the entire laundry.

Therefore, for example, as disclosed in Japanese Patent Application Laid-Open No. 2000-325688 (Patent Document 1), the rotation control of the rotating drum, the opening area of the small holes per unit area of the peripheral wall surface of the rotating drum, and the like are adjusted. This improves the drying efficiency.
JP 2000-325688 A

  However, in order to obtain a desired degree of dryness even in this type of improved washing and drying machine, it is necessary to perform a drying operation for 2 to 3 hours at a high load when the amount of objects to be washed is large. In a load state where a lot of cotton cloth is contained in the laundry object, it is necessary to perform a drying operation for 4 hours or more. For this reason, the present condition is that the user of a washing dryer is dissatisfied with the time of a drying process being long, and being charged with an electricity bill.

  Thus, it is conceivable to increase the input power (heating amount) in order to improve the drying performance (improvement of dryness, shortening of drying time). However, when the heater capacity is set to a high capacity, there is a problem that the temperature of the hot air rises if the air flow rate of the circulation fan is constant, and damage (shrinkage, discoloration, etc.) is given to clothes as a laundry object. As a countermeasure, it is necessary to increase the performance of the blower.

  In addition, in the case of a high load with a large amount of objects to be washed, since the inside of the rotating drum is filled with clothes, the blowing (circulation) resistance is very large, and the air volume does not increase according to the performance even if the performance of the blower is increased. There is a case. For this reason, the hot air blowing temperature rises, and the inconvenience that the clothing located in the vicinity of the blowing port locally overheats arises.

  Therefore, in order to increase the performance of the blower, it is necessary to increase the volume of the rotating drum with respect to the amount of clothing, which causes a problem that the apparatus is increased in size. In the case of a home-use washing and drying machine, the installation space is limited to some extent, and there is a problem that it becomes impossible to install even if performance can be secured by increasing the size of the equipment.

  An object of the present invention is to provide a washing and drying machine capable of drying clothes in a shorter time and efficiently without increasing the size of the device.

  A washing and drying machine according to one aspect of the present invention includes a water tank, a rotating drum, air heating means, air blowing means, and light radiation heating means. The rotating drum is rotatably supported in the water tank and has an opening and an outer peripheral wall surface. The air heating means is for heating air. The blowing means is for sending the air heated by the air heating means into the rotating drum from the opening of the rotating drum. The light radiation heating means is for radiating light toward the outer peripheral wall surface of the rotating drum.

  The washing / drying machine of the present invention includes a light radiation heating unit that emits light (electromagnetic waves) in addition to an air heating unit as a heating source for evaporating moisture from clothing as a laundry object. Thereby, the moisture contained in the clothes washed in the rotating drum is evaporated by the heated air and evaporated by the heat generated by the light emitted to the outer peripheral wall surface of the rotating drum. Thus, in order to dry clothes in the rotating drum by using both convection of heat using heated air as a medium, heat radiation by light radiation, and heat conduction through the outer peripheral wall surface of the rotating drum. In addition, it is possible to increase the amount of heating without excessively increasing the hot air temperature, and to improve the heating distribution on the clothing. Therefore, uniform and efficient heating is possible, and the drying time can be shortened without increasing the size of the device.

  In the washing / drying machine according to one aspect of the present invention, the light radiation heating means preferably includes a light radiator having a color temperature of around 2200K. In this case, most of the energy applied to the light radiation heating means can be converted into radiant energy, and most of the radiant energy can be concentrated in the near infrared wavelength region. For this reason, while being able to heat with high efficiency, the heat absorption by clothing and the heat_generation | fever effect by it can be obtained, without depending on the color tone of the clothing which is a washing | cleaning target object.

  In the washing / drying machine of the present invention, it is preferable that the washing / drying apparatus further includes a reflection means for reflecting light emitted from the light radiation heating means in a direction toward the outer peripheral wall surface of the rotating drum. In this case, the light radiated from the light radiation heating means can be effectively utilized.

  Furthermore, in the washing / drying machine of the present invention, it is preferable that the light radiation heating means is provided in the water tank, and a plurality of holes penetrating into the rotating drum are formed on the outer peripheral wall surface of the rotating drum. In this case, the apparatus is not increased in size by providing the light radiation heating means in the water tank. The light emitted to the outer peripheral wall surface of the rotating drum heats the outer peripheral wall surface of the rotating drum without contacting the outer peripheral wall surface, and enters the rotating drum through a plurality of holes formed on the outer peripheral wall surface of the rotating drum. Irradiation is directly applied to the clothes that are stored as laundry objects. Therefore, the heat is absorbed by the garment without a heat medium and contributes directly to the heat exchange action, and the garment in the rotating drum can be heated more effectively.

  In the washing / drying machine of the present invention, it is preferable that the air heating means and the light radiation heating means can be operated independently and are controlled so as to be simultaneously operable. In this case, it is possible to control an efficient heating amount according to the progress of the clothes drying process.

  In the washing / drying machine of the present invention, the outer peripheral wall surface of the rotating drum preferably has a surface treated so that the visible light absorption rate and the infrared absorption rate are relatively high and the infrared emissivity is relatively low. . In this case, the outer peripheral wall surface of the rotating drum absorbs radiant energy from the light radiation heating means with high efficiency and converts it into heat, and the outer peripheral wall surface of the rotating drum heated thereby hardly radiates heat to the outside. Heat can be effectively conducted to the clothing side through the inner peripheral wall surface of the rotating drum.

  A washing and drying machine according to another aspect of the present invention includes first, second, and third drying means. The first drying means is for drying the laundry object using convection of heated air. The second drying means is for drying the laundry object using heat radiation. The third drying means is for drying the laundry object using heat conduction.

  In the washing / drying machine according to another aspect of the present invention, in order to dry the garment by using heat convection using heated air as a medium, heat radiation, and heat conduction, The amount of heating can be increased without increasing the hot air temperature, and the heating distribution for clothing can be improved. Therefore, uniform and efficient heating is possible, and the drying time can be shortened without increasing the size of the device.

  In the laundry dryer of the present invention, the first drying means includes an air heater for heating the air and a fan for sending the air heated by the air heater to the laundry object, and the second The drying means includes a light radiant heater that radiates light to the laundry object, and the third drying means absorbs heat radiated from the light radiant heater and conducts the absorbed heat to the laundry object. It is preferable to include a container for storing the laundry object so that it can be done.

  As described above, according to the present invention, uniform and efficient heating is possible, and the drying time can be shortened without increasing the size of the device.

  An embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 is a side sectional view showing a schematic configuration of a washing / drying machine as one embodiment of the present invention. As shown in FIG. 1, the washing / drying machine 100 includes a main body 1, a water tank 2 attached to the inside of the main body 1, and a rotating drum 3 that is rotatably supported inside the water tank 2.

  At the bottom of the rotating drum 3, a rotating mechanism unit that rotates the rotating drum 3 forward and backward by the motor 4 is attached. A baffle 5 is attached to the inner peripheral wall surface of the rotating drum 3 in order to stir the clothes in the rotating drum 3. The clothes 6 can be taken in and out, and the door unit 7 is attached to the opening of the rotary drum 3 so as to be openable and closable in order to maintain airtightness and watertightness. The door unit 7 is provided with a door glass 71 so that the state of the garment 6 can be visually recognized from the outside.

  The drying device includes a circulation fan 9, an air heater 10, and a light heater unit 20. The air heater 10 heats air. The circulation fan 9 circulates air through the water tank 2, the inside of the rotating drum 3, and the cooler 8 as a path for the air heated by the air heater 10 to evaporate and dehumidify moisture from the clothes. Let The light heater unit 20 includes a halogen heater 21 that is a light emission heater, and is installed in the water tank 2 to directly irradiate light on the outer peripheral wall surface of the rotating drum 3 and the clothing 6 in the direction indicated by the arrow P. It is configured to be able to. On the outer peripheral wall surface of the rotating drum 3, a light absorbing surface treatment layer 31 that is a surface treatment or coating that efficiently converts light emitted from the halogen heater 21 into heat and reduces heat radiation is formed. The outer peripheral wall surface of the rotating drum 3 is formed with a large number of small holes 32 penetrating into the rotating drum 3 so that light emitted from the halogen heater 21 can pass through and irradiate the clothing 6. Yes. The light heater unit 20 is provided with a reflecting plate 22 for reflecting light emitted from the halogen heater 21 in a direction toward the outer peripheral wall surface of the rotating drum 3. In addition, the light heater unit 20 is provided with a heat-resistant glass plate 23 having high light transmittance in order to protect the halogen heater 21 from washing water and dehydrated water. The light heater unit 20 is attached to the outer peripheral wall surface of the water tank 2 so that the reflecting plate 22 is on the back surface, and the heat-resistant glass plate 23 is fixedly fixed to the outer peripheral wall surface of the water tank 2. Specifically, the light heater unit 20 is in a state where the water tank 2 and the heat-resistant glass plate 23 are sealed using a heat-resistant (thermal insulating) and waterproof sealing material or adhesive, and the outer peripheral wall surface of the water tank 2. It is fixed with screws.

  Next, the operation of the washing and drying machine of the present invention configured as described above will be described.

  In response to a signal from a control means (not shown), the motor 4 rotates forward and backward, and the rotating drum 3 directly connected to the motor 4 also rotates forward and backward in the same manner. By this rotation, the washing process is performed by repeating the operation in which the baffle 5 fixed to the inner peripheral wall surface in the rotating drum 3 lifts the garment 6 and drops it downward. In this way, the washing process is performed using the so-called tapping effect.

  When the washing process is completed, the drain pump 11 is driven and the water in the water tank 2 is discharged from the drain hose 12. Then, it transfers to a rinse process and a dehydration process, and a washing process is complete | finished.

  Next, the operation of the drying process will be described.

  When the washing process is finished and the drying operation is started, the rotating action of the rotating drum 3 causes the stirring action by the vertical movement of the clothes 6 and the power is supplied to the circulation fan 9 and the air heater 10 so that the air temperature is increased. Rises. Water evaporates from the clothing heated by the heated air and flows into the cooler 8. Since the cooling water is supplied into the cooler 8 from the upper cooling water inlet pipe 13 disposed so as to be opposed, the evaporated water is cooled and condensed. This condensed water flows to the drainage pump 11 side, is mixed with cooling water, and is drained. The dehumidified air is returned to the air heater 10 and heated. The heated air flows into the rotating drum 3 and heats the clothing 6 to evaporate moisture contained in the clothing 6. By repeating this, drying of the garment 6 proceeds. The clothing heating source used in the drying process is an air heater 10. In general, the air heater 10 is a sheathed heater provided in an air circulation duct and formed by metallizing a resistance heating wire.

In the drying step in which the air heating is performed, in order to shorten the drying time, it is conceivable to increase the amount of heating and increase the amount of heat per unit area (heat flux Q: W / cm ² ).

When the hot air temperature is t ₁ , the clothing surface temperature is t ₂ , and the forced convection heat transfer coefficient is α, the heat quantity Q per unit area is basically expressed by Q = α × (t ₁ -t ₂ ). Therefore, when the hot air temperature t ₁ is increased, the temperature difference (t ₁ −t ₂ ) can be increased, and the amount of heat (heat flux) can be increased relatively easily.

However, when the hot air temperature t ₁ is increased in order to dry the clothes, the drying rate is greatly different between the easy-to-dry synthetic fiber clothes and the cotton-based clothes containing a lot of moisture. Damages such as shrinkage due to overheating of clothing. Even with cotton-based clothing, if hot air at a temperature exceeding 150 ° C. is applied, damage such as yellowing or scorching occurs. Therefore, it is not preferable to raise the hot air temperature above the current hot air temperature (around 130 ° C.) in order to dry the clothes.

  On the other hand, in order to increase the heating amount, (a) the capacity of the air heater is increased and the circulating air volume (wind speed) is increased to increase the forced convection heat transfer coefficient α, and (b) inside the rotating drum. It is conceivable to keep clothes for a long time.

  However, in (a), when the amount of clothes accommodated in the rotating drum is large and the load is large, the clothes become air circulation resistance and the effect of increasing the air volume (wind speed) cannot be obtained, resulting in a decrease in the air volume. If hot air temperature rises, it may damage clothing. In addition, in order to secure the air volume in consideration of such adverse effects, a large circulation fan and a large-capacity rotating drum are required, which increases the size of the device.

  (B) substantially increases the drying time and is unrealistic.

  From the situation as described above, the washing / drying machine 100 of the present invention is configured such that an increase in the amount of heat necessary for shortening the drying time can be secured by the light emitting heater. In this embodiment, the light heater unit 20 attached to the water tank 2 includes a halogen heater 21 having a color temperature of around 2200K. The halogen heater 21 can irradiate the clothing 6 with light in the direction indicated by the arrow P through the outer peripheral wall surface of the rotating drum 3 and the numerous small holes 32 penetrating from the outer peripheral wall surface of the rotating drum 3 to the inside. Is provided.

  Further, the outer peripheral wall surface of the rotating drum 3 absorbs 95% or more of the energy of the halogen heater 21 and is a light-absorbing surface treatment layer that is a low emissivity surface treatment or coating that hardly radiates absorbed heat as infrared rays. 31 is formed.

  When the halogen heater 21 is turned on, the outer peripheral wall surface of the rotating drum 3 absorbs light with high efficiency and is heated, and heat is conducted to the clothing 6 accommodated in the rotating drum 3 through the heated outer peripheral wall surface. . Along with this heat conduction, light leaking from a large number of small holes 32 penetrating from the outer peripheral wall surface of the rotating drum 3 is directly irradiated to the clothing 6, and the heat conversion effect is directly performed by the absorption rate of the clothing 6. The clothing 6 is heated. Here, the heating amount of the outer peripheral wall surface of the rotating drum 3 and the light radiation amount to the clothing 6 are adjusted by the aperture ratio of the small holes 32. The opening ratio is the ratio of the total opening area of the small holes 32 to the area of the outer peripheral wall surface of the rotating drum 3. Although there is an effective design value for the aperture ratio of the small holes 32, if each half of the heater energy is distributed by the heating amount of the outer peripheral wall surface of the rotating drum 3 and the light radiation amount to the clothing 6, The aperture ratio of the small holes 32 is desirably about 50%. The size of the small holes 32 needs to take into consideration the relationship between the dewaterability or air permeability of clothing and the drum strength, and cannot be increased unnecessarily, but is preferably about 3.5 mm. It is preferable that the small holes 32 are uniformly distributed on the outer peripheral wall surface of the rotating drum 3 in order to make light irradiation to the clothing 6 uniform during the rotation of the rotating drum 3.

  Therefore, the garment 6 is heated by heat conduction on the inner peripheral wall surface of the rotating drum 3, and the light applied to the garment 6 heats the garment 6 by heat radiation (radiation). On the other hand, the air heater 10 heats the garment 6 as usual by heat transfer by forced convection of hot air (heated air). If it does so, compared with the heating only by the forced convection of the conventional hot air (heated air), the area where the clothing 6 is heated can be enlarged and the heating with very high uniformity will be attained. In the washing / drying machine according to the present invention, as a heating method, efficient heating using all of the three elements of heat transfer, heat radiation, convection and conduction, can be performed, and heat conduction and radiation independent of hot air temperature. Can increase the amount of heating.

  Further, in the halogen heater 21 having a color temperature of about 2200 K used in this embodiment, the energy distribution is in the range of about 0.4 μm to 3 μm as the wavelength region, and the energy peak is in the range of about 1 to 1.5 μm. It is in the near infrared region. Such a light heater having a high color temperature has a characteristic that about 94% of the input energy is converted into radiant energy, of which 86% is emitted as infrared rays and the remaining 8% is emitted as visible rays. It is a highly efficient radiant heating source with little heat loss.

In general, radiant energy (radiant heat: W / cm ² ) increases in proportion to the fourth power of the absolute temperature, so that a larger amount of radiant heat can be obtained for a light source with a higher temperature of the heat source. However, when the color temperature rises, the emission wavelength shifts to the short wavelength side, and when the color temperature that approximates sunlight is around 5500 K, the peak wavelength is in the visible light region around 0.5 μm. For this reason, when the radiation to the garment 6 is considered, if the color temperature rises, the absorption rate varies greatly depending on the color tone of the garment 6, and there is a disadvantage that a large difference in heating amount occurs between the white cloth and the black cloth. Therefore, a heater having a color temperature in the vicinity of 2200K is preferable. At such a color temperature, visible light is as small as about 7% of the total amount of radiation, and relatively large heat radiation can be obtained without depending on the color tone of clothing.

FIG. 2 shows the results of measuring the spectral characteristics (reflectance) of dry cotton cloth. As shown in FIG.
It can be seen that the difference due to the color tone is large in the visible light region (wavelength is about 400 nm to 800 nm), and that there is almost no difference due to the color tone in the near infrared region (wavelength is about 800 nm to 2500 nm). In other words, it can be said that heating that does not depend on the color tone is possible with a light heater having a near-infrared region in the peak wavelength (color temperature of about 2000K to 3000K). However, it can be seen that the dry cloth has a high reflectance in the near-infrared region and does not perform efficient heat conversion.

  FIG. 3 shows the results of measuring the spectral characteristics (reflectance) of the water-containing cotton fabric. As shown in FIG. 3, the characteristic at the time of moisture did not show a difference in tendency depending on the color tone, but the reflectance with respect to the moisture content of the cotton cloth was significantly reduced as the moisture content increased (unlike drying) ( It can be seen that the absorption rate increases). In other words, it can be seen that the reflectance tends to depend on water absorption.

  The definition of moisture content is as follows:

Moisture content [%] = {(wet cloth weight [g] −dry cloth weight [g]) / dry cloth weight [g]} × 100
Due to the spectral characteristics of clothing as described above, the light absorption rate is large when the moisture content of the clothing is large as at the start of the drying process, so heating by light radiation is effective. It can be said that it is not very effective in the situation where the moisture content of water is reduced. Therefore, in the first half of the drying process, the air heater 10 and the halogen heater 21 are used together to heat the clothes, and in the second half of the drying process, the halogen heater 21 is stopped or the voltage is controlled to output the halogen heater 21. If it decreases, useless input power can be reduced and efficient drying becomes possible.

  Based on the above knowledge, the washing / drying machine 100 of the present invention takes into consideration the efficiency (energy saving), and the air heater 10 and the halogen heater 21 are used in the drying process and the load (the amount of clothes). Therefore, it is preferable that each can be operated independently and is controlled so as to be able to operate simultaneously.

  FIG. 4 is a schematic side sectional view (A) and a front view (B) showing a configuration example of the light heater unit 20. In the front view (B), the heat resistant glass plate 23 is removed.

  As shown in FIG. 4, a reflector 22 having a high light reflection efficiency is provided on the back surface of the halogen heater 21, and a heat-resistant glass plate 23 having a high light transmittance is provided on the light irradiation surface facing the outer peripheral wall surface of the rotary drum 3. Is provided. The halogen heater 21 is covered with a heat-resistant glass plate 23, and the housing of the light heater unit 20 is made of a metal waterproof case. The waterproof case may be formed of a general metal plate such as stainless steel or galvanized steel plate. In this way, the optical heater unit 20 has a waterproof heater unit specification that can shield water that is scattered in the washing, rinsing, and dehydration processes. In the configuration example shown in FIG. 4, the halogen heater 21 has a ring shape, but a straight tube may be used to reduce the mounting area. Since light is hardly absorbed, it is most preferable to use aluminum as the material of the reflecting plate 22, and stainless steel having metallic luster or the like may be used. The heat-resistant glass plate 23 may be made of a material having high heat resistance and high thermal shock, and for example, crystalline glass is preferably employed.

  The light absorption surface treatment layer 31 formed on the outer peripheral wall surface of the rotating drum 3 has characteristics of high visible light absorption rate and high infrared absorption rate and low infrared emission rate. By forming such a light absorption surface treatment layer 31 on the outer peripheral wall surface of the rotating drum 3, the outer peripheral wall surface of the rotating drum 3 efficiently absorbs the radiant energy range (0.4 μm to 3 μm in the wavelength region) of the halogen heater 21. And heated. The reason why the wavelength region includes the visible light region is that the weight of the visible light region is about 7% of the total radiation amount of the halogen heater 21 but is not useless. The reason why the light absorption surface treatment layer 31 is formed on the outer peripheral wall surface of the rotary drum 3 is as follows.

  When the temperature of the outer peripheral wall surface of the rotating drum 3 rises due to heating, heat is radiated from the outer peripheral wall surface of the rotating drum 3 to the inner peripheral wall surface of the water tank 2 as infrared rays (about 2.5 μm to 30 μm in the wavelength region). It becomes difficult for the temperature of 3 itself to rise. In order to reduce this heat radiation as much as possible, that is, in order to reduce the infrared emissivity, the light absorption surface treatment layer 31 is used for a heat collecting plate material such as a solar water heater with high efficiency. It is necessary to apply a selective absorption coating or a selective absorption paint. For example, it is necessary to form on the outer peripheral wall surface of the rotary drum 3 a film or a film that exhibits the characteristics of a light absorption rate of 0.93 to 0.96 and an infrared emissivity of 0.2 to 0.4. Specifically, it is preferable to apply a paint whose trade name is Okitsumo Solar Paint AP-1A, or to apply a high-temperature oxide film treatment obtained by heat-treating stainless steel itself at a high temperature.

  As described above, in the heating amount increasing method using the air heater and the light radiation heater in the washer / dryer of the present invention, the amount of heating to the clothing can be increased without greatly increasing the hot air temperature. Since the rotary drum itself is directly heated by a high-efficiency radiant heat source, even when the amount of clothing is large, there is little uneven heating due to local hot air temperature rise, and uniform and efficient heating without damage to clothing. It is possible to save power and shorten the drying time.

  Further, since the increase in the heating amount does not depend on the circulating hot air amount, the structure of the blower system and the size of the rotating drum are not increased, and the device can be reduced in size.

  An example of the result of producing an experimental machine of the washing / drying machine 100 configured according to the above-described embodiment and drying 4 kg of the standard clothing according to JIS C9608 is shown below.

  The washer / dryer 100 was provided with an air heater with an electric power of 1.2 kW and a light radiation heater (color temperature of 2200 K) with an electric power of approximately 1.3 kW. When air heater and light radiant heater are used in combination at the same time, the drying time is 195 minutes when only the air heater with power of 1.2 kW is used under the condition that the circulating air volume is not increased and the capacity of the rotating drum is not increased. The drying time was 85 minutes, which was 56% shorter. The standard deviation of the dryness representing the heating unevenness was 6.7% as shown in FIG. 5 when only the air heater was used, whereas the air heater and the light radiation heater were used simultaneously. As shown in FIG. 6, it was improved to 4.6%.

  In addition, the dryness was made the same at 103.3% in the case where only the air heater was used and the case where the air heater and the light radiant heater were used in combination at the same time. Drying degree R (%) is represented by the following formula. Here, Ws is the mass (kg) of the laundry before the drying test, and Wx is the mass (kg) of the laundry after the drying test. This is a test conducted according to JIS C9608.

R (%) = (Ws / Wx) × 100
In addition, the amount of power consumption (Wh) is less than the time when only an air heater with a power of 1.2 kW is used. Although it was large and the input value was large with double power, the power consumption at the end of drying could be reduced by 10% from 3224 Wh to 2906 Wh.

  When the air heater and the light radiant heater are used in combination at the same time, the hot air temperature is about 135 ° C at the maximum, so the hot air temperature is 120 to 135 ° C when using only the air heater. The heating amount could be increased without increasing the temperature.

  It should be considered that the embodiments and examples disclosed above are illustrative and non-restrictive in every respect. The scope of the present invention is shown not by the above embodiments and examples but by the scope of the claims, and includes all modifications and variations within the meaning and scope equivalent to the scope of the claims.

1 is a side sectional view showing a schematic configuration of a washing / drying machine as one embodiment of the present invention. FIG. It is a figure which shows the result of having measured the spectral characteristic (reflectance) of dry cotton cloth. It is a figure which shows the result of having measured the spectral characteristic (reflectance) of the water-containing cotton cloth. They are the schematic sectional side view (A) and front view (B) which show the structural example of the light heater unit 20. FIG. It is a figure which shows distribution of the dryness at the time of using only an air heater. It is a figure which shows distribution of the dryness at the time of heating together using an air heater and a light radiation heater simultaneously.

Explanation of symbols

  1: main body, 2: water tank, 3: rotating drum, 6: clothing, 9: circulation fan, 10: air heater, 20: light heater unit, 21: halogen heater, 22: reflector, 23: heat-resistant glass plate, 31: Light absorption surface treatment layer, 32: Small hole, 100: Washing dryer.

Claims (8)

A tank,
A rotating drum supported rotatably in the aquarium and having an opening and an outer peripheral wall;
Air heating means for heating the air;
An air blowing means for sending air heated by the air heating means into the rotary drum from an opening of the rotary drum;
Light radiation heating means for radiating light toward the outer peripheral wall surface of the rotating drum;
Equipped with a washing dryer.   The washing / drying machine according to claim 1, wherein the light radiation heating means includes a light radiator having a color temperature of around 2200K.   The washing / drying machine according to claim 1 or 2, further comprising reflecting means for reflecting light emitted from the light radiation heating means in a direction toward an outer peripheral wall surface of the rotating drum.   The said light radiation heating means is provided in the said water tank, The some hole penetrated in the said rotating drum in the outer peripheral wall surface of the said rotating drum is formed in any one of Claim 1 to 3 The washing dryer described.   The washing / drying machine according to any one of claims 1 to 4, wherein the air heating unit and the light radiation heating unit are each operable independently and controlled to be operated simultaneously.   The outer peripheral wall surface of the rotating drum has a surface that is treated so that the visible light absorption rate and the infrared absorption rate are relatively high and the infrared emissivity is relatively low. 2. A washing and drying machine according to claim 1. First drying means for drying the laundry object using convection of heated air;
A second drying means for drying the laundry object using heat radiation;
A third drying means for drying the laundry object using heat conduction;
Equipped with a washing dryer. The first drying means includes an air heater for heating air, and a fan for sending air heated by the air heater to a laundry object,
The second drying means includes a light emitting heater that emits light to the laundry object,
The third drying means includes a container that accommodates the laundry object so as to absorb the heat radiated from the light radiating heater and conduct the absorbed heat to the laundry object. The washer-dryer according to 7.

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