JPH03139400A - Drying machine for clothing - Google Patents

Abstract

PURPOSE:To enable various clothing pieces including chemical fibers, to be dried within a short time without any trouble by providing a vacuum pump for evacuating an enclosed pressure-tight vessel. CONSTITUTION:In order to remove air from the interior of a vessel 2 with a vacuum pump 8, an environment for enabling air in contact with clothing A to be made thin and water content to be easily evaporated is formed. Accordingly, even if steam pressure is not heightened by heating, evaporation can be activated, and as a result, without any trouble given to chemical fibers or the like, a drying time can be effectively shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a clothes dryer for drying clothes in a short time.

[Prior Art] Clothes dryers have traditionally been used exclusively in coin-operated laundry machines, etc., but recently various simpler models have been developed, and they are now widely used in general households. It's starting to happen.

The general structure of this type of clothes dryer, as shown in FIG.
A drum 103 rotatably disposed within the container 102, a fan 104 that sucks air from outside into the container 102 and circulates the sucked air through the drum 103, and a heater disposed in the middle of the air circulation. 105 and a drain port 106. Then, by storing the clothing a in the drum 103 and closing the door 101, the drum 103 agitates the clothing a and blows hot air to promote evaporation of moisture, and the hot air containing moisture is directed outside the drum 103. Exhaust the water and drain it through the drain port 10.
After being removed from the drum 6, it is heated again by the heater section 105 and fed into the drum 103, and by maintaining the above operating state for a certain period of time, the drying can be forcibly completed. It has become.

[Problem to be solved by the invention] In this way, conventional clothes dryers can finish drying in a much shorter time than natural drying, but in actual use, the time required is It often feels like a very long time, and as a practical product sent out into the world, it has a vermilion feel. However, as long as the drying is mainly based on heating,
Particularly in the case of chemical fibers that are sensitive to heat, it is not possible to raise the hot air to an extremely high temperature (at most, heating to around 120-130°C to increase the water vapor pressure is the best), so this principle reduces the drying time. It seems difficult to further shorten the time.

The present invention has been made based on this point of view, and an object of the present invention is to provide a clothes dryer that can dry various types of clothes including chemical fibers in a short time without any inconvenience.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a clothes dryer comprising a pressure-resistant, airtight container for storing clothes, and a vacuum pump for evacuating the container. It is characterized by

[Effect] Conventionally, the inside of the container is at atmospheric pressure, so it is filled with air, and in order for the water to evaporate, the air that is in contact with the clothing must be pushed away, which heats the clothing and increases the water vapor pressure. There was a need. In contrast, in the present invention, since the air inside the container is removed using a vacuum pump, the air that comes into contact with the clothing is diluted, creating an environment in which moisture can easily evaporate.

Therefore, evaporation can be activated by increasing the water vapor pressure by heating, and as a result, it becomes possible to effectively shorten the drying time without causing any inconvenience to chemical fibers or the like.

[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the clothes dryer of this embodiment has a container 2 for storing clothes A placed on a base l. container 2
The door 3 is hinged to the front opening, and a sealing material 4 is provided around the abutment surface between the door 3 and the container 2 to ensure airtightness when opened, and also to prevent the container 2 itself from being depressurized. It has a pressure resistance of about 1 kg / A heater 6 is attached to heat the clothing A.The water extracted from the clothing A is received by a drainage lower provided below the drum 5.

On the other hand, a vacuum pump 8 for evacuating the inside of the container 2 is housed in the base l. As the vacuum pump 8,
A device (oil rotary vacuum pump, mechanical booster pump, etc.) that can evacuate the inside of the container 2 to about 1O-3 Torr in a relatively short period of time is used, and the inlet port 8a of the vacuum pump 8 is connected via the bellows 9 and the valve 10. It communicates with the inside of the container 2. Furthermore, if water accumulates in the drainage lower, opening the valve 11 allows the water to be drained to the outside as appropriate.

Then, the wet clothes A from washing etc. are stored in the container 2, the door 3 is closed, the inside of the container 2 is started to be evacuated by the vacuum pump 8, the drum 5 is started to stir the clothes A, and the heater 6 When electricity is started, evaporation progresses as the pressure inside the container 2 decreases, and the moisture is exhausted as water vapor through the vacuum pump 8 (the liquefied material is removed through the drain lower), and at around 10-3 Torr. Early drying of clothing A will be achieved.

This will be explained in comparison with the conventional technology as follows. In other words, when drying clothing, etc. at atmospheric pressure, as shown in Figure 2, heating the clothing to a temperature of 100°C or higher increases the water vapor pressure to 760 Torr or higher. can displace air and evaporate. However, the temperature of the clothing is 100
If the temperature is below ℃, the water vapor pressure is lower than atmospheric pressure, so air cannot be pushed away, and the only option is for it to pass through the air by diffusion. For this reason, in the past, as shown in FIG. 3, it was necessary to heat the clothing at a high temperature to an extent that does not adversely affect the clothing, remove moist air, and feed dry air. On the other hand, in this embodiment, when the pressure inside the container 2 is lowered by the vacuum pump 8, the air in contact with the clothing A becomes diluted, and the mean free path of the water vapor is lengthened, so that the water vapor can freely evaporate. Become. When the pressure decreases, the heat of vaporization (700 cal/g) is taken away by evaporation, the temperature of clothing A decreases, and as shown in Figure 2, the water vapor pressure decreases and the evaporation rate gradually slows down, but in principle Even at sub-zero temperatures, if the water vapor pressure is higher than the surrounding pressure, it can actively evaporate in the form of sublimation. However, in practice, it is not necessary to reduce the pressure to that extent, and as mentioned above, a pressure of about 10 −3 Torr (or higher pressure) is sufficient. In addition, in the illustrated dryer, the clothing A is heated by the radiant heat of the heater 6 to prevent the temperature from becoming too low, so that effective water vapor pressure is ensured and evaporation is stopped and actively carried out.

Therefore, the clothes dryer of this embodiment does not damage the material even when applied to chemical fibers, etc., and can dry clothes more reliably and in a shorter time than before even at room temperature or below. It becomes possible. Therefore, it has great utility value as a dryer with excellent functionality and ease of use. In addition, by shortening the drying time, costs can be reduced, making it possible to lower usage fees at coin laundries and the like, thereby increasing usage rates.

Note that the heater and drum are provided for the purpose of further shortening the drying time, and are not necessarily necessary in principle, and the desired purpose can be sufficiently achieved with a vacuum pump alone. Further, the type of the vacuum pump is not limited to those mentioned above, and any type that can generate an effective negative pressure may be used.

[Effects of the Invention] Since the present invention has the above-described configuration, it is possible to provide a clothes dryer that can dry various types of clothes including chemical fibers in a short time without any inconvenience.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, with FIG. 1 being a principle diagram and FIG. 2 being a graph showing the relationship between temperature and water vapor pressure. Moreover, FIG. 3 is a principle diagram showing a conventional example. A...Clothing 2...Container 8...Vacuum pump

Claims (1)

[Claims] A clothes dryer characterized by comprising a pressure-resistant, airtight container for storing clothes, and a vacuum pump for evacuating the inside of the container.