JP3162533B2 - Clothes dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clothes dryer which can be operated by switching from a dehumidifying type to an exhausting type.

[0002]

2. Description of the Related Art Dryers are generally classified into an exhaust type and a dehumidifying type. Among them, the exhaust type is one that sends air introduced from outside the machine into the drying room and discharges it out of the machine as it is.Although it has good drying efficiency, it also discharges moisture from clothes to be dried outside the machine. It has the disadvantage of increasing the humidity inside the dryer installation room outside.

On the other hand, the dehumidifying type does not discharge the air inside the drying room to the outside, but performs heat exchange with the outside air to dehumidify the air, and then returns the air to the drying room. Although the humidity in the installation room is not increased, the air in the drying room cannot be dehumidified as much as the outside air, so that the drying efficiency is not good.

On the other hand, Japanese Utility Model Application Laid-Open No. 51-1
As disclosed in Japanese Patent Publication No. 12269, a clothes dryer capable of selectively using an exhaust type and a dehumidifying type has been considered.

[0005]

However, even in the clothes dryer considered as described above, the operation is always performed in any one of the selected forms. It has the disadvantage of the shape, and if it is a dehumidified type, it exhibits the disadvantage of the dehumidified type. In this case, the selection is switched manually by the user, which is troublesome.

[0006] The present invention has been made in view of the above circumstances, and therefore its object is taking advantage of the exhaust type and air Shimekatachi, without increasing the dryer installation indoor humidity of the outside, moreover utmost Mainly, it can operate efficiently and can be used without the trouble of manual switching by the user.
Or, dry time provides excellent clothes dryer can prevent spontaneous ignition of the dry clothes, also operating at exhaust type
Air discharged from the drying chamber is directly introduced into the drying chamber
Can be prevented from becoming swollen, and yet still in a dehumidified form
When driving, the air in the drying room passing through the inside air circulation path
Prevents leakage from outside air intake port
To provide a clothes dryer that can cut .

[0007]

In order to achieve the above object, in a clothes dryer of the present invention, first, a drying chamber, an internal air circulation path for circulating air in the drying chamber, and an internal air circulation An outside air circulation path separated from the passage by a heat exchanger to circulate outside air, a communication port provided to communicate from the inside air circulation path to the outside, and a communication port provided to open and close the communication port. And a driving device for driving the shutter to open and close, a drying degree detecting means for detecting a drying degree of the clothes to be dried in the drying chamber, and a controlling means. From the detection result by the degree detecting means, the driving device is configured to close the shutter until it is determined that the degree of dryness of the clothing to be dried has reached a predetermined value, and to open the shutter when it is determined that the degree of drying has been reached. When you control In, shut at the stage of completion of the drying operation
The driving device is controlled to close the motor .

In this case, the degree of drying of the clothes to be dried when the shutter is opened is preferably set to about 90% in terms of the drying rate.

[0009]

Further, there is provided type selection means for selecting the type of operation, and from the selection result by this type selection means,
It is preferable that the control means selectively controls the driving device so as to keep the shutter closed or kept open from the start to the end of the drying operation.

In addition, it is preferable that the communication port is provided so as to face the exhaust port of the outside air circulation path.

Secondly, the clothes dryer of the present invention comprises a drying chamber.
And an internal air circulation path for circulating the air inside the drying chamber.
The outside air is circulated by the heat exchanger
The outside air circulation path to be connected to the outside air circulation path
And a communication port provided to
A shutter provided to be closed, and
A drive device for closing the drive, and a drying target to be dried in the drying chamber.
Dryness detecting means for detecting the dryness of clothes, and the dryness
From the detection result by the detection means, the degree of dryness of the clothes to be dried
Close the shutter until it is determined that the
Release the shutter when it is determined that
Control means for controlling the driving device as described above.
In both cases, the communication port is set facing the exhaust port of the outside air circuit.
Only, characterized in that as the the exhaust port of the external air circulation path into the inside air circulation path are located in different surface sections provided outside air inlet, also closes the external air inlet by the shutter when the communicating port closing When
I do .

[0013]

According to the first means, the shutter is kept closed until the degree of dryness of the clothes to be dried reaches a predetermined value, thereby operating as a dehumidifying type, and after reaching the predetermined value, the shutter is opened. It will be operated as an exhaust type. Moreover, the switching is performed automatically.
Furthermore, after the operation is completed, the shutter is closed.
As a result, the inflow of air from outside the machine is cut off.

In this case, if the drying degree of the clothes to be dried when the shutter is opened is set to about 90% in terms of the drying rate, switching from the dehumidifying type to the exhaust type is performed at the most appropriate place. Can be.

[0015]

Further, there is provided type selection means for selecting the type of operation, and from the selection result by this type selection means,
If the control means selectively controls the drive device to keep the shutter closed or kept open from the start to the end of the drying operation, the dehumidifying type is automatically changed from the dehumidifying type to the exhaust type. In addition to the switching type, a dehumidification type or an exhaust type can be selected and operated.

In addition, when the communication port is provided so as to face the exhaust port of the outside air circulation path, the outside air is mixed with the air discharged from the drying chamber when operating in the exhaust mode, and the temperature is adjusted to an appropriate temperature. Can be lowered.

According to the second means, drying of the clothes to be dried is also possible.
Keep the shutter closed until the temperature reaches the specified value
To operate as dehumidifying type, and after reaching the specified value,
Operate as exhaust type by opening shutter
Will be. Moreover, the switching is performed automatically.
You. In this case, the communication port is connected to the exhaust port of the outside air circuit.
In addition to the external air intake port, the external air intake port is provided in the internal air circulation path on a surface different from the exhaust port of the external air circulation path, and the external air intake port is also closed by the shutter when the communication port is closed. by, be like the exhaust air from the drying chamber when operating at the exhaust type is introduced directly into the drying chamber can be prevented (short circuit), also, yet, when operating at dehumidification form, recirculated air It is also possible to prevent the air in the drying room passing through the road from leaking out of the machine from the outside air suction port.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, FIG. 1 shows an outer box 1 of the entire clothes dryer. A clothes door 2 is formed at a substantially central portion of a front panel 1a, and a door 3 for opening and closing the door 2 is provided.
Is pivoted. A drum 4 having an inside functioning as a drying chamber is disposed in the outer box 1, and a front portion thereof is rotatably supported by a drum front support 5 fixed to the back of the front plate 1 a of the outer box 1. The rear part is also rotatably supported on a casing 7 by a central shaft 6.

The casing 7 communicates with the inside of the drum 4 by an air outlet 8 formed around the rear center of the drum 4 and an air inlet 9 formed around the front center of the casing 7. Is provided with a temperature sensor 10 which can function as a dryness detecting means. In the casing 7,
A fan 11 having a front wing portion 11a and a rear wing portion 11b and serving as a double-wing heat exchanger is provided and rotatably mounted on the shaft 6, and a casing cover 12 is further provided therearound. It is attached to the casing 7.

An outlet 13 is formed in the lower part of the casing 7, a connecting duct 14 is connected to the outlet 13, and a heater duct 15 is connected to the connecting duct 14. The drum 4 faces the inside of the drum 4 from an air inlet 16 formed at the lower portion, and then passes through the casing 7, the connection duct 14, and the heater duct 15 from inside the drum 4.
The inside air circulation path 17 which circulates the inside air is formed.
The connection duct 14 has a drain port 18 at the lower part of the middle part.
A heater 19 is disposed inside the tip of the heater duct 15, and an electrode functioning as a dryness detecting means for detecting the dryness of the clothes to be dried is provided below the drum front support 5. 20 are provided.

On the other hand, the casing cover 12 is
As shown in FIG. 1, a surrounding portion 12a surrounding the fan 11,
Thus, the outer box 1 in which the outlet 13 of the casing 7 exists.
And a ventilation path section 12b extending in the direction of one corner (lower right in the figure). A notch 21 is formed at the boundary. A communication port 22 is formed at the front end of the air passage 12b on the back side of the air outlet 13, and an air supply duct 23 protruding rearward from the communication port 22 is formed. The notch 24 on the side of the notch 21 also forms the duct 23.
Is formed.

The communication port 22 is provided with a shutter 25. As shown in FIG. 3, the shutter 25 has shafts 26 and 27 protruding on both sides of a central portion.
The communication port 22 is opened and closed by rotating about a center 27. The worm wheel 2 is mounted on one shaft 27.
8, a worm wheel 28, a worm 29 meshed with the worm wheel 28, and a motor 30 having the worm 29 mounted on a rotating shaft 30a constitute a drive device 31 for opening and closing the shutter 25.

However, at the opening on the back of the outer box 1,
As shown in FIG. 1, a back plate 32 for closing the open portion of the casing cover 12 is attached together with the open portion thereof. An outside air intake 33 is formed in the center of the back plate 32, and the lower air supply duct is provided. The outside air return port 34 is formed at a position corresponding to the portion 23 (communication port 22), and the outside air is passed through the outside air inlet 33 through the inside of the casing cover 12 to return the outside air return port 34.
An external air circulation path 35 is configured to return to the outside of the machine and circulate.

When the shutter 25 is opened, as shown by the two-dot chain line in FIG.
The air outlet 13 has a length such that the upper end is substantially in contact with the upper edge portion and the rear end is substantially in contact with the intermediate portion of the outside air return port 34. Further, as shown in FIG. 2, the drum 4 is rotated via a belt 36 and the fan 11 is connected to the belt 3 at a corner of the outer box 1 opposite to the side where the connecting duct 14 is provided.
7, a motor 38 for rotating the motor is provided.

In contrast, FIG. 4 shows an operation panel 39 provided on the front surface of the outer box 1 and "course switching".
Key switches 40, display sections 41 to 43 for displaying the respective courses of "Standard", "Elaborate", and "60 minutes", and key switches 44 for "Heater switching". The display units 45 and 46 respectively display the respective heater states of “heater strong” and “heater weak” set by the following. A “type switching” key switch 47 functioning as type selection means for selecting the type of operation.
A display unit 4 for displaying each of the operation types of “dehumidification type”, “exhaust type”, and “automatic” set thereby.
8 to 50, "Start / Pause" key switch 5
1 and a “power” key switch 52.

FIG. 5 shows the main components of the control circuit. The microcomputer 53, which is the center of the control circuit, functions as control means. DC power is supplied. The microcomputer 53 receives a drying rate detection signal for the clothing to be dried from the electrode 20 via a detection circuit 56. In addition, a "power" key switch on the operation panel 39 is provided. 5
Switch input unit 57 consisting of various key switches except 2
Various switch signals are input from the temperature sensor 10, and a temperature detection signal is output from the temperature sensor 10 to the clock pulse generation circuit 5.
8, clock pulses are input.

The microcomputer 53 supplies a drive control signal to a drive circuit 59 for driving the motors 30 and 38 and the heater 19 based on these inputs and a control program stored in advance. I have. Also, the motors 30, 38 are supplied from the power source 54.
The "power" key switch 52 is inserted and connected to a circuit leading to the heater 19.

Next, the operation based on the function of the microcomputer 53 having the above configuration will be described. First,
The shutter 25 is initially in a closed state as shown by a solid line in FIG. From this state, the "power" key switch 52
Is operated and the "start" key switch 51 is operated, the microcomputer 53 starts (starts) the drying operation as shown in FIG.
The operation input by the user is read (step S1),
Next, from the read result, it is determined whether the set operation type is “dehumidification type” or “automatic” (step S2).

If it is determined in step S2 that the type is "dehumidifying type" or "automatic", the heater 19 and the motor 38 are energized (step S3). And the fan 11 is rotated via a belt 37. The rotation of the fan 11 causes the air in the drum 4 to move from the outlet 8 of the drum 4 to the inlet 9 of the casing 7, 7, the connection duct 14, the heater duct 15, that is, the air is returned to the drum 4 through the inside air circulation path 17.
Also, from the rear outside the outer case 1, air outside the machine is returned from the outside air inlet 33 of the back plate 32 to the outside of the outer case 1 through the inside of the casing cover 12 and the outside air return port 34, that is, the outside air circulation path 35. Thus, in the casing 5 and the casing cover 12, the air inside the drum 4 and the air outside the outer box 1 are heat-exchanged by contacting the fan 11 and the drum 4
The inside air is dehumidified. Therefore, the dehumidified air in the drum 4 passes through the heater 19, is turned into hot air, and is supplied into the drum 4. That is, at this time, the clothes dryer is operated as a “dehumidifying type”.

In this situation, the microcomputer 53
According to a detection signal from the electrode 20 via the detection circuit 56, the degree of dryness of the clothes to be dried previously put in the drum 4 is a first predetermined value, in particular, in this case, a dryness equivalent to the end of the constant rate drying period. It is determined whether or not the drying rate of, for example, 90 [%] has been reached (step S4). When it is determined that the drying rate has been reached, it is next determined whether or not the operation type is "automatic". A decision is made (step S5).

If it is determined in step S5 that the operation is "automatic", the motor 30 is energized in the normal rotation direction. (Step S6).

Then, in the driving device 31, the worm 29 meshes with the worm wheel 28 and rotates the worm wheel 28 in the normal rotation direction.
To open the communication port 22 as shown by the two-dot chain line in FIG. For this reason, the air in the drum 4 sucked into the casing 7 passes through the communication port 22 and the upper half of the air supply duct 23 and from the upper half of the outside air return port 34 of the back plate 32 to the outer box 1. To be discharged outside, and at the same time,
The air outside the outer box 1 passes from the lower half of the outside air return port 34 of the back plate 32 through the air supply duct 23 and the lower half of the communication port 22,
From the air outlet 13 of the casing 7, the air further passes through the connection duct 14 and the heater duct 15, and is turned into hot air and supplied into the drum 4. That is, in this case, the clothes dryer changes to be operated as the “exhaust type”.

Thereafter, the microcomputer 53 detects the degree of dryness of the clothes to be dried in the drum 4 by a second predetermined value, in this case, by a detection signal from the electrode 20 via the detection circuit 56. It is determined whether or not the drying rate corresponding to the end of the rate drying period, for example, a drying rate of 98 [%] has been reached (step S7). When it is determined that the drying rate has been reached, whether or not a predetermined time has elapsed thereafter. (Step S
8). If it is determined that the predetermined time has elapsed, the heater 19 is turned off (step S9), the operation is switched to the cold air operation, and then it is determined whether or not the predetermined time has elapsed (step S10). When determined, the motor 28 is turned off (step S11), and the motor 30 is turned off.
Is supplied in the reverse direction in this case (step S12). Therefore, in the driving device 31, the worm 29 rotates the worm wheel 28 in the reverse direction,
The shutter 25 is also rotated in the reverse direction to close the communication port 22 as shown by a solid line in FIG. 1, and thereafter, the microcomputer 53 ends the operation (end).

FIG. 7 shows the change of the temperature of the hot air supplied into the drum 4 and the change of the temperature of the hot air discharged from the drum 4 with time in the above-mentioned "automatic" type operation.

If it is determined in step S5 that the type of operation is not "automatic" with respect to the "automatic" type operation described above, the process proceeds from step S6 to step S7. In this case, the operation is continued while the shutter 25 is kept closed, and the operation of the "dehumidification" type is performed throughout. FIG. 8 shows the temperature of the hot air supplied to the inside of the drum 4 and the change of the temperature of the hot air discharged from the inside of the drum 4 with time by the above-mentioned "dehumidification" type operation.

If it is determined in step S2 that the operation type is not "dehumidification type" or "automatic", the motor 30 is energized in the normal rotation direction as in step S6, and the shutter 2 is turned on.
5 is released (Step S13), and then Step S13 is performed.
3 Similarly, the heater 19 and the motor 38 are energized (step S14), and the process proceeds to step S7, that is, in this case, the operation is continued while the shutter 25 is kept open, and the “exhaust” type operation is performed throughout. Is performed. FIG. 9 shows the temperature of the hot air supplied into the drum 4 and the change of the temperature of the hot air discharged from the drum 4 with time by the above-mentioned "exhaust" type operation.

As described above, in the present configuration, by selecting the "automatic" operation type, the clothes to be dried can be operated as a dehumidifying type until the degree of dryness of the clothes to be dried reaches a predetermined value. It can be operated as a form, i.e., while the moisture is coming out of the clothing to be dried actively, it can be operated without letting the moisture out of the machine, and it can be operated after the moisture is less emitted. Yes, it is possible to operate as efficiently as possible without increasing the humidity inside the dryer installation room outside the machine.

When the humidity coming out of the clothes to be dried decreases, the temperature in the drum 4 rises and the clothes are damaged or shrunk. Therefore, by switching the operation to the exhaust type, the inside of the drum 4 is changed. By lowering the temperature (see FIG. 7), it is possible to prevent the garment from being damaged or shrunk.

Moreover, the operation can be switched automatically by the microcomputer 53 and the drive unit 31 without the need for manual switching by the user, and the operation is switched appropriately. be able to.

In this case, in particular, in the above configuration, the degree of drying of the clothes to be dried when the operation is switched is set to about 90% in terms of the drying rate, so that the switching from the dehumidifying type to the exhaust type is performed. It can be done at the most appropriate place.

Further, in the above configuration, the shutter 25, which has been switched from the dehumidifying type to the exhaust type or opened as the exhaust type, is closed at the end of the drying operation (see step S12). Thus, the inflow of air from outside the machine after the operation is stopped and the inside of the drum 4 is deprived of oxygen, whereby spontaneous ignition of the clothes to be dried can be prevented.

Further, as the type of operation, not only "automatic" but also "dehumidification" or "exhaust" can be performed exclusively, thereby increasing the humidity inside the dryer installation room outside the machine. A use mode in which no priority is given or a use mode in which efficient operation is prioritized can be respectively adopted as desired.

In addition, since the communication port 22 is provided so as to face the outside air return port 34 of the back plate 32 which is the exhaust port of the outside air circulation path 35, the air in the drum 4 when operating in the exhaust mode can be provided. The outside air sucked from the outside air inlet 33 and discharged from the outside air return port 34 through the cutouts 21 and 24 can be mixed, and the temperature can be reduced to an appropriate temperature. Seizure of the indoor wall surface can be prevented.

10 to 12 show another embodiment of the present invention. In the embodiment, the outside air return port 34 of the back plate 32 is separated from the outside air return port 34 by the outside air. In this embodiment, the suction port 60 is formed and opened and closed at the same time as the communication port 22 is opened and closed by the shutter 61 having an L-shaped cross section. (Refer to a two-dot chain line in FIG. 10), it is possible to prevent the air discharged from the inside of the drum 4 from being directly introduced into the drum 4 (short circuit), and still have a dehumidifying type (see a solid line in FIG. 10). ), It is possible to prevent the air in the drum 4 passing through the inside air circulation path 17 from leaking out of the machine from the outside air suction port 60.

The shutter 61 in this case is also provided in FIG.
As shown in the figure, shafts 62 and 63 are protruded on both sides of the central portion.
And the outside air inlet 60 is opened and closed. or,
The worm wheel 28 of the driving device 31 is attached to one of the shafts 63, and meshes with the worm 29 attached to the rotating shaft 30 of the motor 30, so that the motor 30 causes the worm 29 and the worm wheel 28 to pass through.
The shutter 25 is driven to open and close.

In addition, the present invention is not limited to the embodiment described above and shown in the drawings. In particular, the degree of drying of the clothes to be dried may be detected not by the drying rate but by the temperature. The present invention can be carried out with appropriate changes within a range not departing from the gist.

[0048]

The clothes dryer of the present invention is as described above, and has the following effects. ◎ Clothing drying of claim 1
According to the machine, a drying chamber, an internal air circuit that circulates air in the drying chamber, an external air circuit that circulates outside air separated by the internal air circuit and a heat exchanger, and A communication port provided to communicate with the outside of the machine, a shutter provided in the communication port to open and close the communication port, a driving device for opening and closing the shutter, and clothing to be dried in the drying chamber Drying degree detecting means for detecting the degree of drying, and control means, from the detection result by the drying degree detecting means, until it is determined that the drying degree of the clothes to be dried has reached a predetermined value to close the shutter, to control the drive device so as to open the shutter when it is determined to have reached, dried luck
The driving device is configured to close the shutter at the end of the rotation.
By which is adapted to control the location, taking advantage of the exhaust type and air Shimekatachi, without increasing the dryer installation indoor humidity of the outside, moreover utmost can be efficiently operated, also shrinkage pain and of the dry clothes Therefore, the switching can be performed appropriately without the need for manual switching by the user. Furthermore, after the operation is completed, air
Refuse inflow to prevent spontaneous ignition of clothing to dry
it can.

According to the clothes dryer of the second aspect, the degree of drying of the clothes to be dried when the shutter is opened is determined to be about 90% in terms of the drying rate, so that the clothes can be changed from the dehumidifying type to the exhausting type. Switching can be performed at the most appropriate place.

[0050]

According to a third aspect of the present invention, there is provided the clothes dryer , further comprising type selection means for selecting an operation type, and based on a result of the selection by the type selection means, the control means closes the shutter from the start to the end of the drying operation. By selectively controlling the drive device to continue or keep it open, in addition to the type that automatically switches from the dehumidification type to the exhaust type and operates, it also has a dehumidification-only type or an exhaust-only type The type of operation can also be selected, and a usage mode that prioritizes not increasing the humidity inside the dryer installation room outside the machine or a usage mode that prioritizes efficient operation can be adopted as desired. it can.

According to the clothes dryer of the fourth aspect, since the communication port is provided so as to face the exhaust port of the external air circulation path, the external air is supplied to the exhaust air from the drying chamber when operating in the exhaust mode. The temperature can be reduced to an appropriate temperature by mixing, and the seizure of the indoor wall surface behind the exhaust port can be prevented.

According to the clothes dryer of the fifth aspect, the drying room
And an internal air circulation path for circulating the air inside the drying chamber.
The outside air is circulated by the heat exchanger
The outside air circulation path to be connected to the outside air circulation path
And a communication port provided to
A shutter provided to be closed, and
A drive device for closing the drive, and a drying target to be dried in the drying chamber.
Dryness detecting means for detecting the dryness of clothes, and the dryness
From the detection result by the detection means, the degree of dryness of the clothes to be dried
Close the shutter until it is determined that the
Release the shutter when it is determined that
Control means for controlling the driving device as described above.
In both cases, the communication port is set facing the exhaust port of the outside air circuit.
In addition, by providing an outside air suction port in the inside air circulation path on a different surface portion from the exhaust port of the outside air circulation path, by closing the outside air suction port with a shutter when the communication port is closed,
Taking advantage of the exhaust type and dehumidification type, outside dryer installation room
It can be operated as efficiently as possible without increasing the humidity inside,
Less damage and shrinkage of the clothes to be dried
Manual switching without the need for manual switching
In addition, it is possible to prevent the exhaust air from the drying chamber from being introduced into the drying chamber as it is when operating in the above-mentioned exhaust mode (short circuit), and still operate in the dehumidifying mode. In this case, it is also possible to prevent the air in the drying chamber passing through the inside air circulation path from leaking out of the machine through the outside air suction port.

[Brief description of the drawings]

FIG. 1 is an overall vertical side view showing an embodiment of the present invention.

FIG. 2 is a rear view showing a state in which the entire outer case back plate is removed.

FIG. 3 is a perspective view of a shutter and a drive unit.

FIG. 4 is a front view of an operation panel.

FIG. 5 is a schematic electric configuration diagram.

FIG. 6 is a flowchart for explaining the operation.

FIG. 7 is a diagram showing a change over time in the temperature of the supplied hot air and the temperature of the discharged hot air during the “automatic” type operation.

FIG. 8 is a diagram showing a change over time in the temperature of the supply hot air and the temperature of the discharge hot air during the “dehumidification” type operation.

FIG. 9 is a diagram showing a change over time in the temperature of the supplied hot air and the temperature of the discharged hot air during the “exhaust” type operation.

FIG. 10 is a view corresponding to FIG. 1, showing a different embodiment of the present invention.

FIG. 11 is a diagram corresponding to FIG. 2;

FIG. 12 is a diagram corresponding to FIG. 3;

[Explanation of symbols]

4 is a drum (drying chamber), 10 is a temperature sensor (dryness detecting means), 11 is a fan (heat exchanger), 17 is an inside air circulation path, 20 is an electrode (dryness detecting means), 22 is a communication port, and 2 is a communication port.
5 is a shutter, 31 is a driving device, 34 is an outside air return port (exhaust port of the outside air circulation path), 35 is an outside air circulation path, 47 is a key switch for "type switching" (type selection means), and 53 is a microcomputer (controller). Means), 60 is an outside air inlet,
Reference numeral 61 denotes a shutter.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-50-100662 (JP, A) JP-A 61-140797 (JP, U) JP-A 3-7398 (JP, U) JP-A 61-140 184594 (JP, U) Japanese Utility Model Showa 58-125595 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) D06F 58/28

Claims (5)

(57) [Claims] 1. A drying chamber, an internal air circulation path for circulating air in the drying chamber, an external air circulation path separated from the internal air circulation path by a heat exchanger and circulating outside air, and A communication port provided to communicate outside the machine,
A shutter provided at the communication opening to open and close the shutter; a driving device for opening and closing the shutter; a drying degree detecting means for detecting a degree of drying of the clothes to be dried in the drying chamber; From the detection result by the degree detecting means, the driving device is configured to close the shutter until it is determined that the degree of dryness of the clothing to be dried has reached a predetermined value, and to open the shutter when it is determined that the degree of drying has been reached. When you control
In both cases, close the shutter at the end of the drying operation.
And a control means for controlling the driving device . 2. The clothes dryer according to claim 1, wherein the degree of drying of the clothes to be dried when the shutter is opened is set to about 90% in terms of a drying rate. 3. A type selecting means for selecting a type of operation.
From the selection result by this type selection means
Means for closing the shutter from the start to the end of the drying operation.
Control the drive to keep it open or open
2. The clothes dryer according to claim 1, wherein the drying is selectively performed . 4. The communication port faces the exhaust port of the outside air circulation path.
Clothes drying machine according to claim 1 or 3, wherein the provided. 5. A drying chamber, and air in the drying chamber is circulated.
The internal air circuit to be separated from the internal air circuit and the heat exchanger.
An external air circulation path for circulating external air
A communication port provided to communicate outside the machine from the circulation path,
A shutter provided at the communication port to open and close the communication port
A driving device for driving the shutter to open and close;
Dryness detection to detect the dryness of clothes to be dried in a room
From the output means and the detection result by the dryness detection means.
Before it is determined that the dryness of the dried clothing has reached the predetermined value
The shutter is closed, and when it is determined that the shutter has been reached, the
A control for controlling the driving device so as to open a shutter.
Control means, and the communication port is provided so as to face an exhaust port of the outside air circulation path, and the inside air circulation path is connected to the outside air circulation path.
Provide an outside air intake port located on a different surface from the air port to communicate
To also close the outer air-suction port in the shutter other when mouth closed
Clothing dryer characterized in that the.