JPH02191494A - Dehumidification type cloth drier - Google Patents

Abstract

PURPOSE:To enable cooling air flow to be adjusted according to the atmospheric temperature in a housing by sending efficiently cooling blast for cooling exothermic parts mounted in the housing according to sensed temperature in the housing. CONSTITUTION:Temperature in a rotary drum 15 beings to rise in the start of running. Heat is radiated from the surface of the rotary drum 15 as the temperature rises to raise temperature inside a housing 22. A sensing means 21 provided in the housing 22 senses the temperature in the housing 22. Information from the sensing means 21 is sent to a control means 23 which judges whether or not preset temperature is reached to open a lid 20b provided on an outlet 20a by a switch means (for example solenoid) 24 if the said temperature is reached and close same if said temperature is not reached. Even in the case of closing the lid, the outlet 20a is not 100% closed, but necessary minimum cooling air is sent.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a dehumidifying clothes dryer for use in general households.

2. Description of the Related Art A conventional dehumidifying clothes dryer will be described with reference to FIG. 1 is a rotary drum rotatably provided in the main body 2;
Reference numeral 3 denotes a heat exchange type blower which is a heat exchange means for introducing hot air from the heater 4 into the rotary drum 1 and exchanging heat with outside air to dehumidify the high temperature and high humidity air. Reference numeral 5 denotes a circulation path connecting the heat exchange type blower 3 and the heater 4.

Reference numeral 6 denotes a cooling air path for guiding the cooling air from the heat exchange type blower 3, and a part thereof has an air outlet 6a. 7 is a back plate having intake holes 8 for introducing cooling air. Further, 9 is a drain port for draining condensed water generated by heat exchange, and 1o is a motor for driving the rotating drum 1 and the heat exchange type blower 3.

When the motor 10 rotates in the above configuration, the drum 1 and the heat exchange type blower 3 rotate, and the air heated by the heater 4 (black arrow) enters the drum 1, exchanges heat with the clothes, and then becomes hot and humid. Become. This hot and humid air reaches the heat exchange type blower 3, and the air inlet 8 of the back plate 7
It exchanges heat with the more drawn cooling air (white arrow), passes through the circulation path 5, reaches the heater 4 again, and is introduced into the drum 1, repeating the cycle. The condensed water generated during the heat exchange is drained out of the main body 1 through a drain port 9 provided below the circulation path 5.

Further, a portion of the cooling air from the air outlet 6a provided in the cooling air path is blown to heat generating components such as the motor 1o to cool them.

When damp clothes are dried using the dehumidifying clothes dryer having the above structure, the temperature within the drum 1 changes as shown in FIG. In Fig. 5, A is a preheating drying process in which the air heated by the heater 4 exchanges heat with the damp clothes in the drum 1, and hot and humid air begins to come out, causing the temperature in the drum 1 to gradually rise. . B is a constant rate drying process, in which the first is the amount of heat supplied from the heater 4, the second is the heat exchange between the air heated by the heater 4 and the damp clothing, and the third is the heat output from the damp clothing. Heat exchange between the hot and humid air and the heat exchange blower 3, and when these three have reached equilibrium, the drum 1
The temperature inside remains constant. C is a decreasing rate drying process, in which the damp clothes gradually dry, the three equilibriums in the constant rate drying process B are disrupted, and the temperature inside the drum 1 gradually rises. Finally, drying ends at point D. The above are the characteristics of temperature changes within the drum 1 in a general dehumidifying clothes dryer.

In dehumidifying clothes drying with such a configuration, the temperature E in the constant rate drying step is controlled by the output of the heater 4, the amount of clothes to be dried, the heat exchange capacity of the heat exchange type blower 3, the outside air temperature, etc.

Problems to be Solved by the Invention We have confirmed through experiments that when the temperature decreases by 20°C, the constant rate drying temperature E decreases by about 10°C, that is, about % of the outside temperature difference. There are two main reasons for this.1
The first reason is that the heat of the circulating air inside the drum 1 is absorbed by the cooling air introduced from the outside air when heat exchange is performed by the heat exchange type blower 3, and the lower the outside air temperature, the greater the heat that is taken away. .

However, in this case, there is no particular problem because the dehumidification efficiency is also increased at the same time. Another factor that lowers the constant rate drying temperature E is the heat generating components installed in the cooling air path 6, mainly the motor 1o.
The cooling air from the air outlet 6a that cools the drum 1 also cools the surface of the drum 1, thereby further accelerating heat dissipation from the drum 1. Similarly, in this case, the lower the outside temperature, the more heat is transferred.

The latter, the air blown from the air outlet 6a provided in the cooling air path 6, is mainly used to cool the motor 1o, but when the outside air temperature is low, the heat radiation may become large. Since this leads to a decrease in thermal efficiency, such as an increase in drying time, the problem has been how to reduce the thermal Ronne as described above.

The present invention has been made to solve these problems, and it is an object of the present invention to provide a dehumidifying clothes dryer that can adjust the amount of cooling air depending on the ambient temperature inside the housing.

Means for Solving the Problems In order to solve the above problems, the dehumidifying clothes dryer of the present invention includes a rotating drum that rolls clothes, and a rotating drum in which clothes are stored.
A circulation path for circulating mold, a heat exchange means for dehumidifying hot and humid air disposed in the middle of the circulation path, and cooling air introduced into the heat exchange means inside the casing, and exhausting the cooled air outside the cylindrical body. A cooling air path, an air outlet that blows out a portion of the air in this cooling air path to heat-generating components inside the housing, an opening/closing means that adjusts the amount of cooling air from the air outlet, and a sensor that measures the temperature inside the housing. and a control means for controlling opening/closing of the opening/closing means based on a signal from the sensing means.

According to a dehumidifying clothes dryer with a working description, the opening/closing means that controls the amount of cooling air that cools heat-generating components opens and closes by sensing the ambient temperature inside the casing. If the temperature is low, closing the opening/closing means and reducing the cooling air volume will reduce heat loss from the drum surface, which will reduce thermal efficiency when using the dehumidifying clothes dryer in low-temperature environments. can be prevented.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

However, the feature of the present invention lies in the configuration around the four air outlets that control the amount of cooling air introduced into the heat exchanger into the housing, and the other configurations are the same as the conventional example.
The explanation of that part will be omitted.

FIG. 1 is a longitudinal sectional view of a dehumidifying clothes dryer showing an embodiment of the present invention, and 12 is a heat exchange type blower which is a heat exchange means disposed in the middle of a circulation path 11 for circulating hot air. be. Reference numeral 13 denotes a motor which is a heat generating component, and its rotation is transmitted to the heat exchange type blower 12 via a belt 14. On one side, the heat exchange type blower 12 circulates high-temperature and humid air 16 in the rotating drum 15, and on the other side, a cooling volume 17 is introduced through a back plate 19 having an intake hole 18 to circulate the air between the two. The high-temperature and humid air 16 is dehumidified by exchanging heat with the air. 2o is a cooling air path for guiding the cooling air 17 of the heat exchange type blower 12, and 20a is an outlet for guiding a part of the cooling air 17 to heat generating parts such as the motor 13. 21
is a sensing means that senses the temperature inside the casing 22 that houses each of the constituent members listed in P.

Figure 2 is an enlarged view of the vicinity of the air outlet 20a;
FIG. 3 is an explanatory diagram of Rinsaku for explaining the operation of the opening/closing means 24 shown in FIG. 2. FIG.

In Fig. 2, 20a is the above-mentioned air outlet, 2ob
is a lid that covers the air outlet 20a. Reference numeral 24 denotes an opening/closing means consisting of a solenoid that opens and closes the lid 2Qb to adjust the cooling air volume.The signal to this means is shown in FIG. 3.Control means 23
It will be sent to you.

This operation will be explained below using the above configuration. When the dehumidifying clothes dryer starts operating, the temperature inside the rotating drum 15 begins to rise. Along with this, heat is radiated from the surface of the rotating drum 16, and the temperature inside the housing 22 increases. A sensing means 21 provided inside the housing 22 senses the temperature inside the housing 22. Information from the sensing means 21 is sent to the control means 23, which determines whether or not a preset temperature has been reached, and controls the opening/closing means 24 (here, a solenoid).
As a result, the lid 2 provided on the air outlet 20a
ob is controlled to be open if the set temperature has been reached, and closed if the set temperature has not been reached. However, even if it is closed, instead of closing the 1oo% outlet 20a,
The configuration is such that the required minimum amount of cooling air is blown.

As a result, when the outside air temperature is low such as in winter, the temperature inside the housing 22 does not rise and the volume of cooling air 17 can be reduced, the lid 20b remains closed and heat loss can be prevented. .

Further, in this embodiment, when the lid 20b is used with the lid 20b open and the temperature detected by the sensing means 21 falls below a predetermined temperature,
The opening/closing means 24 is actuated by a signal from the control means 23,
The lid 20b is configured to be closed. In this way, heat loss can be minimized by adjusting the amount of cooling air 17 blown from the outlet 20a according to the temperature inside the housing 22.

Effects of the Invention As is clear from the above embodiments, the dehumidifying clothes dryer of the present invention detects the temperature inside the housing to increase the efficiency of the cooling air that cools the heat-generating components installed inside the housing. By doing so, it is possible to accurately cool the heat-generating parts and to minimize the heat flow from the drum surface, thereby improving thermal efficiency.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing the structure of a dehumidifying clothes dryer according to an embodiment of the present invention, FIG. 2 is an enlarged view of main parts showing the cooling air outlet of the dehumidifying clothes dryer, and FIG. The figure is a block diagram showing the opening/closing operation of the air outlet, Figure 4 is a vertical cross-sectional view of a conventional dehumidifying clothes dryer, and Figure 5 is a rotating drum when drying damp clothes with the same dehumidifying clothes dryer. It is a diagram showing temperature changes inside the refrigerator. 12... Heat exchange type blower, 16... Rotating drum, 20... Cooling air path, 20a...
... Air outlet, 21... Sensing means, 22.
...Housing, 23...Control means, 24...
...Opening/closing means. Fig. 15--One Dou lN π--41 Soku Gunnku Fig. Fig.

Claims (1)

[Claims] A rotating drum that rolls clothes, a circulation path that circulates hot air within the rotating drum, a heat exchange means that dehumidifies the hot and humid air placed in the middle of the circulation path, and a cooling air that flows to the heat exchange means inside the housing. Introducing a cooling air path that exhausts the cooled air outside the housing, an air outlet that blows some of the air in this cooling air path to heat-generating components inside the housing, and adjusting the amount of cooling air from the air outlet. A dehumidifying clothes dryer comprising an opening/closing means for controlling the temperature inside the housing, a sensing means for measuring the temperature inside the housing, and a control means for controlling opening/closing of the opening/closing means based on a signal from the sensing means.