JPH0212119B2 - - Google Patents

Description

Detailed Description of the Invention <Technical Field of the Invention> The present invention includes a refrigeration cycle consisting of a compressor, a condenser, a throttling mechanism, and an evaporator, and the condenser is connected to a heat source,
A clothes dryer that uses an evaporator as a dehumidification source and dries damp clothes hung in a closed space, such as a bathroom, and is equipped with a means to detect when the clothes have dried and to stop the device. It is.

<Prior art> Conventionally, as this type of dryer, for example, JP-A-57-
As shown in Publication No. 209698, a refrigeration cycle for increasing the amount of moisture removed per unit amount of air,
In particular, the condenser is divided, the suction air is heated, and then applied to damp clothing.The air, whose temperature has decreased due to evaporation of moisture in the clothing, is heated again in another condenser and is applied to other clothing again. A configuration that achieves the purpose has been proposed.

However, there is no mention of means for detecting the completion of drying clothes.

<Summary of the Invention> The present invention has a built-in refrigeration cycle, generates high-temperature dry air, accelerates drying by applying this air to damp clothes, and has drying completion detection means, and has a drying completion detection means. It is an object of the present invention to provide a clothes dryer that reduces energy consumption by eliminating unnecessary operations and prevents the dryer from stopping when the clothes are not dry.

<Embodiments of the Invention> Figure 1 shows an overall configuration diagram of a bathroom with a dryer installed on the ceiling as an example of a closed space.
20 is the dryer itself, 20 is the damp clothes after washing and dehydration,
30 is a bathroom.

1 is a compressor, 2 is a condenser, 3 is a throttle mechanism, 4 is an evaporator, and 5 is a blower, and arrows in the figure indicate air flow.

With the above configuration, when the damp clothes 20 after washing and dehydration are hung in the bathroom 30 and the dryer is operated, the air that has become humid due to the evaporation of water from the clothes is transferred to the main body 1.
The air is sucked in through the suction port 10a on the bottom surface, cooled and dehumidified by the evaporator 4, heated by the condenser 2 and compressor 1, and hot and humid air is blown out from the blowout port 10b, gradually reducing the moisture content of the clothes and drying them. be done.

Therefore, the amount of moisture (absolute humidity) contained in the air in the bathroom 30 gradually decreases with the operating time of the dryer, and has a close relationship with the completion of drying the clothes.

Figure 2 shows the drying progress on an psychrometric chart when the outside temperature of the bathroom is 20°C.
The main body is in a state of insufficient supply of refrigerant until it reaches steady operation, and its functions, ie, dehumidifying ability and heating capacity, are insufficient, but as it approaches steady state, the compressor input increases. For this reason, the blowing temperature gradually rises, lower temperature air is blown out, and moisture evaporation from the clothes progresses. Therefore, the temperature and absolute humidity of the intake air are increased.
After the absolute humidity reaches a peak value of approximately x = 0.0132Kg'/Kg, it gradually decreases due to the decrease in the amount of moisture evaporated from the clothes, and the clothes are dry at approximately x = 0.0094Kg'/Kg. Then, it becomes possible to stop operation. At this time, the temperature gradually increases until it stops, about 24℃.
It stopped at a relative humidity of about 50% RH.

In Figure 3, the temperature outside the bathroom, operating at low temperatures such as 10°C and high temperatures such as 30°C, is shown on the psychrometric diagram as in Figure 2, but the progress along the way shows the same changes as in Figure 2. At low temperature x = 0.0055Kg'/Kg, relative humidity 55%RH, at high temperature x = 0.0145Kg'/Kg,
Indicates relative humidity 45%RH.

Incidentally, the two-dot chain line in FIG. 3 represents the change in absolute humidity depending on the intake air temperature.

From the above results, if the absolute humidity of the suction air is corrected by the suction air temperature, that is, x=f(t), and this x is detected for each suction air, it is possible to know when drying is complete.

Therefore, in the present invention, as shown in 6 in FIG. 1, the drying inlet 10a is provided with a suction air temperature detection means and an absolute humidity detection means, and the temperature detected by the absolute humidity detection means is provided. Means is provided for stopping the operation when the absolute humidity reached reaches the drying completion setting absolute humidity corrected by the suction temperature detected by the temperature detecting means.

According to this configuration, the operation of the dryer can be automatically stopped when drying of the clothes is completed without being affected by air conditions outside the bathroom.

<Effects of the Invention> As described above, according to the present invention, the set absolute humidity corrected by the suction air temperature is used as a means of detecting the dryness of clothes, and the dryer can be automatically stopped, so that time constraints can be avoided. Eliminate and eliminate undrying of clothes,
This is highly effective as it eliminates energy loss due to wasteful operation after drying.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of a dryer installed in the ceiling of a bathroom as an example of a closed space, Figure 2 is a graph showing the change in the state of the air sucked into the dryer when the outside temperature of the bathroom is 20°C, and Figure 3 is a bathroom It is a graph showing the state transition of intake air when the outside temperature changes. DESCRIPTION OF SYMBOLS 1... Compressor, 2... Condenser, 3... Throttle mechanism, 4... Evaporator, 5... Air blower, 6... Detection means, 10... Dryer body, 20... Clothes, 30...
…bathroom.

Claims (1)

[Claims] 1 The condenser of a refrigeration cycle consisting of a compressor, condenser, throttling mechanism, and evaporator is configured as a heating source and the evaporator as a dehumidification source. A clothes dryer that generates high-temperature dry air by cooling, dehumidifying, and then reheating the air, blows the generated air onto clothes, and dries damp clothes. and means for stopping the operation when the absolute humidity detected by the absolute humidity detection means reaches the drying completion setting absolute humidity corrected by the suction air temperature detected by the temperature detection means. A clothes dryer featuring: