JPS64237Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a dryer that is capable of long-time air drying operation using room temperature.

[Technical background of the invention]

Traditionally, this type of dryer has been equipped with a drying chamber such as a rotating drum that accommodates the material to be dried, as well as a fan and a heater, and hot air generated by these fans and heaters is passed through the drying chamber to dry the material. I let it dry.

[Problems in the Background Art] However, according to the conventional method described above, since drying is always carried out using hot air, there are problems in that the amount of electricity consumed is large and the material to be dried tends to wrinkle. .

[Purpose of invention]

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to dry the material to be dried with less power consumption, with less wrinkles, and moreover, to dry the material reliably within a specified time. The purpose of the present invention is to provide an extremely practical dryer that can perform drying.

[Summary of the idea]

In addition to being equipped with a drying chamber, a fan that blows air into the drying chamber, and a heater that heats the air, the present invention also includes an operation selection means that can select at least hot air drying operation and long-time blow drying operation, and a room temperature control. and a control device for selecting an operation by the operation selection means and controlling the operation according to the room temperature detected by the room temperature detection means; When a long-term ventilation operation is selected, the fan is activated and the heater is activated, and when a long-term ventilation operation is selected, the fan is activated and a part of the heater is controlled to lower the room temperature below a predetermined value by the room temperature detection means. The drying device is characterized in that it is activated and operated only when it is detected, thereby enabling efficient drying.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. In front of the drum 2, a drying material inlet/outlet 3, an intake port 4, and an exhaust port 5, which are opened and closed by a door (not shown), are formed so as to face the inside of the drum 2. a plurality of, for example, four positive temperature coefficient thermistors 6a, 6b, 6c, 6d.
A heater 6 consisting of the following is provided. On the other hand, an exhaust duct 7 is connected to the exhaust port 5, and the tip of the exhaust duct 7 faces above the outside of the outer box 1, and a fan 8 is formed near the tip.
An impeller 10 is installed inside the casing portion 9 of the vehicle. Reference numeral 11 denotes a motor disposed at the lower corner of the outer box 1 symmetrically with the fan 8. A drive pulley 12 is attached to the rotating shaft of the motor, and from the drive pulley 12, the tension pulley 13, the drum 2, and the Impeller 1
A belt 15 is looped around a driven pulley 14 attached to a rotating shaft of the fan 8, so that the drum 2 and the impeller 10 of the fan 8 are rotationally driven by the motor 11. Next, in FIG. 2, 16 is a plug that is plugged into a household power outlet (not shown), and one of the plug terminals 16a is connected to a door switch 17 and a start switch 18, which open and close in accordance with the opening and closing of the aforementioned door. Connect one power line 19 via
The other power supply line 20 is connected to the other insertion terminal 16b. 21 is a relay connected between both power lines 19 and 20, and its contact 21a is connected to the starting switch 1.
8 is connected in parallel. Also, 22 is both power supply line 1
This transformer has a primary side 22a connected between 9 and 20, and a central part 24 of a control device 23 is connected to a secondary side 22b of the transformer. The central part 24 of the control device 23 is composed of, for example, a microcomputer, and although not shown in detail, the input terminals of the control device 23 can perform hot air drying operation using the heater 6, which is normally performed, and air drying operation using only air blowing at room temperature. A changeover switch 25 as an operation selection means, which is equipped with, for example, three push buttons 25a, 25b, and 25c, which can select a long-time ventilation drying operation at room temperature, and the degree of dryness of the material to be dried in the drum 2. For example, a pair of electrodes 26 as a device for detecting the temperature (room temperature) and a thermistor 27 as a room temperature detection means for detecting the temperature (room temperature) of the room in which the dryer is installed are connected to the output terminal. Relay 28, 29, 3
0 and 31 are connected, and the contact 28a of the relay 28 is connected in series with the aforementioned motor 11 between the power wires 19 and 20, and the contact 29a of the relay 29 is also connected between the power wires 19 and 20 as described above. It is connected in series with the parallel connection circuit of heaters 6a, 6b, and 6c in the heater 6, and the contact 30a of the relay 30 is also connected in series with the remaining heater 6d between the power lines 19 and 20, and the contact 31a of the relay 31 is is connected in series with the relay 21. Note that 32 is a thermoswitch for detecting abnormal temperature disposed, for example, in the exhaust duct 7, and is inserted and connected to the power supply line 20 at a position before the heater 6.

Now, in the case of this embodiment configured as above,
After storing clothes to be dried, mainly washed and dehydrated clothes, in the drum 2 and thus in the drying room, the door (not shown) is closed, the door switch 17 is closed, and the changeover switch 25 is activated to perform hot air drying operation and blow only air. When the start switch 18 is closed after selecting either the drying operation or the long-time ventilation drying operation, the relay 21 is energized, thereby closing the contact 21a and performing self-holding to the transformer 22. Keep the power on. Therefore, the central part 24 of the control device 23 connected to the secondary side of the transformer 22 also starts operating here, and the central part 24 of the control device 23 that has started operating in this way is now in the previous state. If the hot air drying operation is selected by the changeover switch 25, the relays 28, 29, and 30 are energized to close the respective contacts 28a, 29a, and 30a. Therefore, all of the motor 11 and heater 6 6a, 6b, 6
c and 6d are energized, and the energized motor 11 connects the drum 2 and the impeller 1 of the fan 8 via the belt 15.
0 is rotationally driven, the material to be dried is stirred in the drum 2, and wind is generated by sucking outside air into the drum 2 from the intake port 4 and exhausting it from the exhaust port 5 through the exhaust duct 7. Since the heater 6 heats the air with all of its parts 6a, 6b, 6c, and 6d to make it into hot air, the hot air is passed through the drum 2 and the drying material is strongly dried. Therefore, soon, for example, in about one and a half hours, the degree of dryness of the material to be dried will reach a certain level or higher, and the electrode 26 will detect this, and therefore the central part 24 of the control device 23 will also energize the relays 29 and 30. The heater 6 is cut off and the respective contacts 29a and 30a are opened.
stop the heat generation. Therefore, more than that is, for example, 5
The rotation of the drum 2 and the rotation of the impeller 10 of the fan 8 continue by energizing the motor 11 by continuing to energize the relay 28 for about a minute, so that no heat is generated inside the drum 2. When the air is passed through and the prescribed 5 minutes have passed, the relay 28 is also de-energized and the contact 28 is closed.
By opening a and cutting off the motor 11,
The rotation of the impeller 10 of the drum 2 and the fan 8 is stopped, and at the same time the relay 31 is energized to open the contact 31a (normally closed), and the energization to the relay 21 is cut off to open the contact 21a. ,
The control device 23 also has its central portion 24 de-energized and stops all operations. Next, if the previous changeover switch 25 selects the blow drying operation that only blows air, the central part 24 of the control device 23 energizes only the relay 28 to close the contact 28a.
Therefore, only the motor 11 is energized, the drum 2 is rotated, and the impeller 10 of the fan 8 is rotated to perform the air blowing operation for about 5 minutes in the same way as at the end of the hot air drying operation. After the time has elapsed, all operations are stopped by cutting off the power to the relay 28 and energizing the relay 31 in the same manner as described above.

If the long-term ventilation drying operation is selected by the changeover switch 25, the central part 24 of the control device 23 normally operates the relay 28.
The drum 2 is rotated by energizing only the fan 8.
Air blowing operation is performed only by rotating the impeller 10, but if the room temperature detected by the thermistor 27 falls below a predetermined temperature, for example, 20 [°C], the relay 3 is activated based on the temperature detection.
0, closes the contact 30a, and energizes the heater 6d, which is a part of the heater 6. Therefore, the air passing through the drum 2 is heated by the heater 6d, raising the insufficient temperature, and increasing the temperature inside the drum 2. Drying power at 20
Increase the temperature to the same level as above [℃]. Then, when the room temperature becomes 20 [℃] or higher again, the power to the relay 30 is cut off, the contact 30a is opened, and the heater 6d is turned off.
In order to stop the heat generation, the operation returns to the previous operating state of only air blowing, and when the degree of dryness of the material to be dried reaches a certain level or higher, it is detected by the electrode 26 as described above and the power to the relay 28 is cut off. , On the other hand, by energizing relay 31, all operations are stopped.

By the way, there has been an idea in the past of drying clothes to be dried, such as clothes after washing, by only using the air blowing operation of a dryer. However, when drying is performed only by blowing air, the degree of drying is highly dependent on room temperature. For example, as shown by characteristic line A in Figure 3, if the room temperature is 20 [°C] or higher, the above-mentioned It takes less than 8 hours to dry the dried product, that is, the time from when the user goes to bed at night until he wakes up in the morning, but if the temperature is below 20 [℃], it takes longer than that, and when he wakes up in the morning. Occasionally, problems occur such that the material to be dried is not yet dried. On this point, in this embodiment, as mentioned above, when the room temperature falls below 20 [°C], the heater 6d, which is a part of the heater 6, is energized to generate heat, thereby causing the air to pass through the drum 2. Since the temperature of the air is increased to compensate, drying operation can be performed at a temperature of 20 degrees Celsius or higher at all times.
Therefore, the dried material can be reliably dried in about 8 hours, for example, and the dried material can be used when waking up in the morning. In this case, even if the heater generates heat, it is only the heater 6d, which is a part of the heater 6, so its power consumption is small, and as shown in Fig. In this case, the power consumption during the hot air drying operation (characteristic line B) was 2 [KWh] or more, whereas in this example, the long-time air blowing that causes the part 6d of the heater 6 to generate heat according to the room temperature The power consumption during drying operation (characteristic line C) is approximately 1 [KWh], which can be reduced to less than half.

Note that the room temperature at which the part 6d of the heater 6 generates heat is not limited to the above-described predetermined value of 20 [° C.], but may be set to a temperature higher or lower than that.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and changes may be made as appropriate, particularly with respect to the specific number of heaters and whether drying operation using only air blowing is performed, etc., without departing from the gist of the invention. It can be implemented by

[Effect of idea]

As is clear from the above, the present invention is equipped with a drying chamber, a fan that blows air into the drying chamber, and a heater that heats the air, and is also capable of selecting at least hot air drying operation and long-time blow drying operation. The control device includes an operation selection means, a room temperature detection means for detecting room temperature, and a control device that performs operation control according to the operation selection by the operation selection means and the detected room temperature by the room temperature detection means, and the control device is configured to When the hot air drying operation is selected, the fan is operated and the heater is operated, and when the long-time air blowing operation is selected, the fan is operated and a part of the heater is activated by the room temperature detection means. The heater is characterized in that the heater is operated only when the room temperature is detected to be below a predetermined value, and a part of the heater is operated only when the room temperature is below the predetermined value, thereby reducing the amount of material to be dried. It is possible to provide a dryer that can perform drying with less wrinkles even though it consumes electric power, and has excellent practical effects such as being able to reliably dry within a predetermined time.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a rear view with the entire back plate removed, Fig. 2 is an electrical circuit diagram, and Fig. 3 shows room temperature and drying time. FIG. 4 is a diagram showing the relationship between room temperature and power consumption. In the figure, 2 is a drum (drying room), 6 is a heater, 6
d is a part of the heater, 8 is a fan, 11 is a motor,
15 is a belt, 23 is a control device, 24 is a central part of the control device, 25 is a changeover switch (operation selection means),
27 is a thermistor (room temperature detection means), 28, 29,
30, 31 are relays, 28a, 29a, 30 respectively
a and 31a are relay contacts, respectively.

Claims (1)

[Scope of utility model registration request] An operation selection means that is equipped with a drying chamber, a fan that blows air into the drying chamber, and a heater that heats the air, and that is capable of selecting at least a hot air drying operation or a long-time blow drying operation, and a room temperature detection means that detects the room temperature. The control device also includes a control device that performs operation control according to the operation selection by the operation selection means and the detected room temperature by the room temperature detection means, and the control device controls the operation of the fan when the hot air drying operation is selected by the operation selection means. and a heater, and when a long-term ventilation operation is selected, the fan is activated and a part of the heater is activated only when the room temperature detecting means detects a room temperature below a predetermined value. A dryer characterized in that it is operated by being activated.