JP2005304992A - Clothes drier and washing drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clothes drier and a washing drier without reducing a drying speed, while reducing heat damage of clothes by lowering the air temperature in drying. <P>SOLUTION: This clothes drier has an air heating heater 10 for heating air for drying the clothes 6 by using convection of heated air, and a halogen heater 21 for radiating heat for drying the clothes 6 by using radiation heat; and dries the clothes 6 by controlling the output ratio of the air heating heater 10 and the halogen heater 21. The washing drier 100 has the clothes drier having the above characteristic. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention generally relates to clothes dryers and laundry dryers, and more particularly to improvement of drying performance in clothes dryers and laundry dryers.

  A conventional drying apparatus such as a clothes dryer or a washing dryer generally heats and drys clothes by supplying high-temperature air into the apparatus. In such a drying apparatus, in order to increase the drying speed, improvements such as increasing the heater capacity to make the air in the apparatus have a higher temperature have been made. However, as the drying temperature increases, there is a problem that heat damage to clothing such as yellowing (discoloration) increases.

  Therefore, for example, Japanese Patent Laid-Open No. 3-80899 (Patent Document 1) proposes a clothes dryer having a heat source structure that can dry cloth and clothes having low heat resistance. For example, this clothes dryer is configured to apply power to only a semiconductor heater having a low output value when clothes having a low heat-resistant temperature are dried.

Japanese Patent Application Laid-Open No. 5-137894 (Patent Document 2) proposes a clothes dryer that can prevent hot air from directly hitting clothes during drying of clothes and prevent shrinkage and discoloration of clothes. This clothing dryer is configured so that the clothing is dried by being blown into a rotary drum from a hot air outlet formed in a front wall fixing portion above the clothing inlet.
Japanese Patent Laid-Open No. 3-80899 JP-A-5-137894

  However, in the clothes dryer described in Japanese Patent Laid-Open No. 3-80899, in order to reduce heat damage by drying clothes that are vulnerable to heat at low temperatures and drying clothes that are not easily affected by heat at high temperatures, There is a problem that it takes time to sort clothes into those that are dried at a high temperature and those that are dried at a high temperature, and that drying time becomes long when the clothes are dried at a low temperature.

  Moreover, in the clothes dryer described in JP-A-5-137894, there is a problem that the drying time becomes long because the clothes temperature hardly rises.

  Accordingly, an object of the present invention is to provide a clothes dryer and a washing dryer that can reduce the heat damage of clothes by reducing the air temperature during drying and that does not reduce the drying speed.

  The clothes dryer according to the present invention radiates heat to dry the clothes using radiant heat and air heating means for heating the air to dry the clothes using convection of heated air. A radiant heating means is provided, and the clothing is dried by controlling the output ratio of the air heating means and the radiant heating means.

  In the clothes dryer of the present invention, the clothes are heated by using both the air heating means and the radiation heating means as heat sources. Of the heat sources, the air heating means heats the air to such an extent that the dehumidifying function is not hindered according to the output ratio, thereby contributing to drying of the clothes without excessively increasing the air temperature. On the other hand, the radiant heating means directly heats the garment without air and contributes to the drying of the garment with an output corresponding to a reduction in the output of the air heating means according to the output ratio. Thereby, according to the output ratio, by suppressing an excessive increase in the air temperature, it is possible to reduce the air temperature at the time of drying and reduce the heat damage of the clothes, and to reduce the efficiency without reducing the drying speed. Good clothes drying can be realized.

  The clothes dryer according to the present invention has a dryness R2 that is substantially the same as the dryness R1 obtained when the clothes are dried using only air heating means under the conditions of the drying time t1 and the maximum temperature T1 of the drying atmosphere. The air heating means and the radiant heating means are used in combination, and the output ratio of the air heating means and the radiant heating means is controlled so as to be obtained at the maximum temperature T2 of the dry atmosphere lower than T1, and is almost the same as the drying time t1 It is preferable to dry the clothes at a drying time t2. With the above configuration, air temperature and clothing temperature during drying can be reduced without reducing drying performance compared to the case where only air heating means is used, and thermal damage to clothing such as clothing discoloration is suppressed. can do.

  Further, in the clothes dryer according to the present invention, in order to achieve the above-described effects, the clothes are dried by controlling the output ratio of the air heating means and the radiant heating means to be approximately 8: 2. preferable.

  Furthermore, in the clothes dryer according to the present invention, it is preferable that the radiant heating means includes a light emitter having a color temperature of around 2200K. In this case, most of the energy applied to the radiant 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 drying object.

  The clothes dryer of the present invention preferably further includes heat conduction means for drying the clothes using conduction of heat radiated from the radiation heating means. Thereby, the heat radiated from the radiant heating means can be effectively utilized.

  The radiant heating means includes a light radiant heater that radiates light to the garment, and the heat conducting means absorbs the heat radiated from the light radiant heater and can conduct the absorbed heat to the garment. Preferably, it includes a container for housing clothing. Thereby, clothing can be heated through a container.

  Furthermore, it is preferable that the outer peripheral wall surface of the container 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 container absorbs radiant energy from the radiant heating means with high efficiency and converts it into heat, and the outer peripheral wall surface of the container heated thereby hardly radiates heat to the outside. Heat can be effectively conducted to the clothing side through the peripheral wall surface.

  A laundry dryer according to the present invention includes a clothes dryer having any of the features described above.

  As described above, according to the present invention, the air heating means and the radiant heating means are used together, and the heating according to the output ratio can reduce the air temperature and the clothing temperature during drying without reducing the drying performance. It is possible to suppress thermal damage to clothing such as discoloration of clothing.

  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 provided with a clothes dryer 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 as a container 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 as an air heating means heats air. The circulation fan 9 as the air blowing means communicates the inside of 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 moisture from the clothes and dehumidify it. Circulate the air. The light heater unit 20 as a radiant heating means includes a halogen heater 21 that is a light radiant heater. The light heater unit 20 is installed in the water tank 2 and emits light in the direction indicated by the arrow P on the outer peripheral wall surface of the rotating drum 3 and the clothing 6. It is configured to be able to irradiate directly. 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.

  The washing / drying machine 100 of the present invention is configured so that the clothes 6 can be heated not only by the air heater 10 but also by the light radiation heater at the same time in the drying process. In this embodiment, the light heater unit 20 attached to the water tank 2 is provided with a halogen heater 21 having a color temperature in the vicinity of 2200K as a light radiation heater. 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 clothes 6 as usual by heat transfer by forced convection of hot air (heated air). Then, the garment 6 can be heated and dried to substantially the same degree as compared with the conventional heating by forced convection of hot air (heated air). 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.

  Thus, by using the outer peripheral wall surface and the inner peripheral wall surface of the rotating drum 3 as heat conduction means for drying clothing using the conduction of heat radiated from the halogen heater 21 as radiant heating means, the halogen heater The heat radiated from 21 can be used effectively. In other words, the rotating drum 3 serving as the heat conducting means absorbs the heat radiated from the halogen heater 21 and accommodates the garment 6 so that the absorbed heat can be transmitted to the garment 6. Clothing 6 can be heated through the drum 3.

  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 5500K, 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.

  In this way, most of the energy applied to the halogen heater 21 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 the clothing 6 and the heat_generation | fever effect by it can be obtained, without depending on the color tone of the clothing 6 which is a drying object.

  FIG. 2 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. 2, a reflective plate 22 having a high light reflection efficiency is provided on the rear 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 side of the rotating 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. 2, 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.

  In this way, the outer peripheral wall surface of the rotating drum 3 has a surface that is treated such that the visible light absorption rate and the infrared absorption rate are relatively high and the infrared emissivity is relatively low. The outer peripheral wall of the rotary drum 3 absorbs radiant energy from the halogen heater 21 with high efficiency and converts it into heat, and the outer peripheral wall surface of the rotating drum 3 heated thereby hardly radiates heat to the outside. Heat can be effectively conducted to the clothing 6 side through the peripheral wall surface.

  As described above, in the washing / drying machine 100 of the present invention, the clothes 6 are heated by using the air heater 10 and the halogen heater 21 in combination as heat sources. Of the heat sources, the air heater 10 contributes to drying the garment 6 without excessively raising the air temperature by heating the air to such an extent that the dehumidifying function is not hindered according to the output ratio. On the other hand, the halogen heater 21 directly heats the garment 6 without air and contributes to the drying of the garment 6 with an output corresponding to the output of the air heater 10 lowered according to the output ratio. Thereby, by suppressing an excessive increase in the air temperature according to the output ratio, the air temperature at the time of drying can be lowered to reduce the heat damage of the garment 6, and the efficiency can be achieved without reducing the drying speed. The clothes 6 can be dried well.

  An example of a result obtained by manufacturing an experimental machine of the washing / drying machine 100 configured according to the above embodiment and drying 2 kg of standard clothing according to JIS C9608 is shown below.

  The washer / dryer 100 was provided with an air heater and a light radiant heater (color temperature 2200K). Heating was performed for 80 minutes by simultaneously using an air heater (light heater) and a light radiation heater (light heater) at the same time by changing the output (W) ratio under the condition that the circulating air volume was not increased and the capacity of the rotating drum was not increased. The dryness (%) of the clothing in this case is shown in Table 1 and FIG.

乾燥度Ｒ（％）は次の式で示される。

Drying degree R (%) is shown by the following formula.

R (%) = (Ws / Wx) × 100
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 in accordance with JIS C9608.

  From Table 1 and FIG. 3, when the air heater alone is dried at 1350 W, the dryness is 99.6%, slightly less than the dryness of 97.2% when the air heater 1050 W and the light radiation heater 300 W are used together. Although it is rising, it can be seen that the dryness is close to saturation. If the ratio of the light radiant heater is further reduced, the light radiant heater hardly functions as a heat source, and the air radiant heater is dried only by an air heater having a low output for the output of the light radiant heater. Thus, in order to maintain the high degree of dryness so that the reduction in drying performance can be suppressed as much as possible, the air heating heater is 1050 W and the light emission heater is 300 W (with an output ratio of It can be seen that the ratio is preferably about 8: 2).

  Therefore, in the experimental machine of the washer / dryer 100, when the air heater 1050W and the light radiant heater 300W (color temperature is 2200K) are installed and heated at the same time, the circulation air volume does not increase and the rotating drum capacity does not increase. When 4 kg of clothing was dried for about 150 minutes, as shown in Table 2, the average dryness of the clothing was almost the same as when dried with only the air heater 1350W. At this time, compared with the case where it dried only with the air heater 1350W, the air temperature could be reduced about 20 degree | times and the clothing temperature could be reduced about 10 degree | times. Therefore, according to the present invention, it is understood that the hot air temperature and the clothing temperature can be lowered while maintaining the same drying performance as when only the conventional air heater is used.

ここで、乾燥時の空気温度と変色の度合いを示す色差（ΔＥ）との関係を調べた結果を図４に示す。この結果は、木綿タオルを脱水直後から図４の横軸に示す各温度の空気下で４時間乾燥させたものと原布とを比較して得られたものである（原布の色差＝０）。木綿タオルをすべて同様の条件で洗濯した後、脱水し、乾燥前の脱水度は約６０％であり、このときの含水率は約６７％であった。乾燥手段として空気加熱ヒータと送風機を用いたが、温度を一定に保つため、通常の洗濯乾燥機ではなく、恒温乾燥室内に木綿タオルを吊り下げて乾燥させた。

Here, the result of examining the relationship between the air temperature during drying and the color difference (ΔE) indicating the degree of discoloration is shown in FIG. This result was obtained by comparing a cotton towel after drying for 4 hours under air at each temperature indicated on the horizontal axis in FIG. 4 immediately after dehydration and the raw fabric (color difference of raw fabric = 0). ). All cotton towels were washed under the same conditions and then dehydrated. The degree of dehydration before drying was about 60%, and the water content at this time was about 67%. Although an air heater and a blower were used as drying means, in order to keep the temperature constant, a cotton towel was suspended in a constant temperature drying chamber instead of a normal washing dryer, and dried.

  The degree of dehydration is expressed by the following formula.

Dehydration degree [%] = (dry cloth weight [g] / water-containing cloth weight [g]) × 100
The water content is expressed by the following formula.

Moisture content [%] = {(wet cloth weight [g] −dry cloth weight [g]) / dry cloth weight [g]} × 100
As shown in FIG. 4, when the air temperature during drying is lowered from 100 ° C. to 80 ° C., it can be seen that the value of the color difference is lowered from about 2.2 to 1.8. At this time, the difference in the degree of discoloration of the cotton towel was visually recognizable. Therefore, according to the present invention, it can be said that discoloration can be suppressed by reducing the air temperature during drying by about 20 degrees as described above.

  From the above experimental results, in the washer / dryer of the present invention, the drying is almost the same as the dryness R1 obtained when the clothes are dried under the conditions of the drying time t1 and the maximum temperature T1 of the drying atmosphere using only the air heater. The air heating heater and the light radiant heater are used in combination so that the degree R2 can be obtained at the maximum temperature T2 of the dry atmosphere lower than the temperature T1, and the output ratio of the air heater and the light radiant heater is controlled. By drying the garment with substantially the same drying time t2, the air temperature and the garment temperature during drying can be reduced without lowering the drying performance as compared with the case where only the air heater is used. It turns out that the heat damage of clothing, such as discoloration, can be suppressed.

  It can also be seen that it is preferable to dry the garment by controlling the output ratio of the air heater and the light radiant heater to be approximately 8: 2 in order to achieve the above-described effects.

  In the above drying test results, it was assumed that it is appropriate to control the output ratio of the air heater and the light radiation heater to about 8: 2 in the experimental machine of the washing dryer 100 of the present invention. However, as shown in FIG. 5, due to the radiation energy characteristics (left vertical axis) of the halogen heater and the wavelength-dependent absorption characteristics (right vertical axis) of the cotton cloth, the lower the degree of dehydration, that is, the more moisture contained in the cloth. It can be said that the cloth absorbs radiant energy efficiently. For this reason, for example, the output ratio of the light radiation heater is set high at the beginning of the drying process, and the output ratio of the air heater is gradually increased as the drying process proceeds. Only the heater (1350W) is used, and only the air heater (1350W) with the same output as the light radiant heater is used in the latter half of the drying process. It is also conceivable to control such as using only an air heater (1350 W) in the latter half of the drying process. In such a case, further improvement of drying performance and reduction of heat damage of clothing can be expected. Therefore, in the washing / drying machine and the clothes drying machine of the present invention, the optimum output ratio of the air heater and the light radiant heater is not limited to about 8: 2.

  Further, in the above embodiments and examples, a washing dryer having a clothes drying function has been described as an example. However, the above-described effects can be obtained by a similar configuration even in a clothes dryer having no washing function. Can be achieved.

  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. 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 the result of having measured the relationship between the output ratio of an air heater and a light radiation heater, and dryness. It is a figure which shows the result of having measured the relationship between the air temperature at the time of drying, and the color difference ((DELTA) E) which shows the degree of discoloration. It is a figure which shows the radiation energy characteristic (left vertical axis | shaft) with respect to the radiation wavelength of a halogen heater, and the wavelength dependence absorption characteristic (right vertical axis | shaft) of cotton cloth.

Explanation of symbols

  1: Main body, 2: Water tank, 3: Rotating drum, 6: Clothing, 10: Air heater, 20: Light heater unit, 21: Halogen heater, 32: Small hole, 100: Washer / dryer.

Claims (8)

Air heating means for heating the air to dry the clothing using convection of the heated air;
Radiant heating means for radiating heat to dry clothing using radiant heat,
A clothes dryer for drying clothes by controlling an output ratio between the air heating means and the radiation heating means.   The highest temperature of the dry atmosphere in which the dryness R2 that is substantially the same as the dryness R1 obtained when the clothes are dried under the conditions of the drying time t1 and the maximum temperature T1 of the dry atmosphere using only the air heating means is lower than the temperature T1. As obtained at T2, the air heating means and the radiant heating means are used in combination, the output ratio of the air heating means and the radiant heating means is controlled, and the drying time t2 is substantially the same as the drying time t1. The clothes dryer according to claim 1, wherein the clothes are dried.   The clothes dryer according to claim 1 or 2, wherein the clothes are dried by controlling the output ratio between the air heating means and the radiation heating means to be approximately 8: 2.   The clothes dryer according to any one of claims 1 to 3, wherein the radiant heating means includes a light radiator having a color temperature of around 2200K.   The clothes dryer according to any one of claims 1 to 4, further comprising heat conduction means for drying the clothes using conduction of heat radiated from the radiant heating means. The radiant heating means includes a light radiant heater that emits light to clothing,
The clothes drying apparatus according to claim 5, wherein the heat conducting means includes a container that accommodates the clothes so as to absorb the heat radiated from the light radiating heater and conduct the absorbed heat to the clothes. Machine.   The clothes dryer according to claim 6, wherein the outer peripheral wall surface of the container has a surface that is treated such that the visible light absorption rate and the infrared absorption rate are relatively high and the infrared emissivity is relatively low.   A laundry dryer comprising the clothes dryer according to any one of claims 1 to 7.

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