JPS6355958B2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a clothes dryer.

Clothes dryers generally consist of a drum that rotates with clothes placed therein, and a heater and a blower for blowing hot air into the drum. FIG. 1 schematically shows the structure of the clothes dryer. In the figure, 1 is a drum connected to a motor (not shown), and clothes 2 to be dried are placed inside this drum. A heater 3 is arranged on the side or rear of the drum 1, and a fan 4 connected to a blower motor 5 is arranged further behind the heater 3. To outline the operation, after putting damp clothes into the stationary drum 1, the drum 1 is rotated, and then the hot air A obtained by driving the heater 3 and the fan 4 is transferred to the drum. Blow air inside. The damp clothes are then agitated by the rotation of the drum and simultaneously dried by the hot air. It should be noted that the term "clothing" here refers to a relatively wide range of items, including ordinary clothing such as clothes, as well as general cloth such as sheets.

By the way, in the clothes dryer having the above-mentioned structure, since friction inevitably occurs between the inner circumferential surface of the drum 1 and the clothes, or between the clothes, the generation of static electricity becomes a problem. Particularly, when the drum is made of a resin molded product, as is the case with most conventional clothes dryers, severe static electricity is generated when the clothes to be dried are made of synthetic fibers. Therefore, when taking out the clothes after drying, the clothes may get an electric shock, or the clothes may stick together and cannot be separated, causing discomfort to the operator and making it complicated to organize the clothes.

The purpose of this invention is to prevent charges caused by frictional charging from remaining between the drum and the clothes and between the clothes after drying and when the door is opened, thereby making it easier to take out the clothes and organize them afterwards. Our goal is to provide clothes dryers.

The present invention provides a device for injecting the charge remover into the drum for a predetermined period of time at the end of drying and when the door is opened.

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

FIG. 2 shows the structure of a charge removing device for a clothes dryer according to an embodiment of the present invention, and FIG. 3 shows a circuit diagram of a control circuit for the same dryer.

In FIG. 2, the charge removing device 6 is attached to the drum 1'.
A charge remover cylinder 60 containing a charge remover is disposed at the rear lower part of the drum 1'
and a nozzle 61 facing the inside of the dryer, and is removably fixed within the dryer main body by a known attachment mechanism. Also, above the nozzle 61 is a solenoid 7 that is operated by a signal from a control circuit, which will be described later.
is arranged so that the nozzle 61 can be pressed at a desired time by the vertical movement of the actuator 70. Therefore, by operating the solenoid 7, charge removing agent is injected into the drum 1' during its operating time.

Next, the control circuit of this clothes dryer will be explained with reference to FIG.

In the figure, 10 is a commercial AC power supply, and a door switch 11 is connected to this power supply 10, which is connected to a door (not shown) for taking clothes in and out of the drum.
and a timer 12 that can be set up to a maximum of 120 minutes are connected in series, and a motor 13 (in this embodiment, a motor 13 for rotating the drum 1' and the fan for blowing air) is connected between the timer 12 and the power supply 10. The fan is rotated by the same motor 13), and two heaters 14, 1
5 is connected.

The timer 12 includes a motor 120 that rotates a cam (not shown), and contacts 121 and 122 that are turned on and off by the cam, and both of the contacts 121 and 122 are turned on depending on the timer time setting. , when the same amount of time has elapsed, contact 122 is first turned off due to the circumferential shape of the cam, then 5 minutes later, contact 121 is turned off, and at the same time, motor 1 is turned off.
20 is designed to stop rotating. That is, the timer 12 supplies power to the motor 13 and heaters 14 and 15 at the same time as setting the timer time,
At the same time as the timer time elapses, first the heater 14,
It functions as a sequence switch that turns off the power to the motor 15 and then stops the rotation of the motor 13 after 5 minutes have elapsed. The switch 16 connected to the heater 15 is used when there is a request to change the temperature of the hot air, and is a manual switch attached to the main body of the dryer that can be opened or closed at will by the operator.

An AC relay 17 having a normally closed contact 170 is further provided between the timer 12 and the power source 10.
However, a charging path a consisting of a series circuit of a diode 18, a resistor 19, and a capacitor 20 is connected, and a resistor 2 is connected across the capacitor 20.
3, and a series circuit of a DC relay 21 having a normally open contact 210 are connected to constitute a discharge path b.

Further, the normally closed contact 17 of the AC relay 17
0 and the normally open contact 210 of the DC relay 21
are connected in series, respectively, and constitute a drive switch for the solenoid 7 connected in series to the power source 10. In addition, 22 is a manual push button type switch to enable the solenoid 7 to be driven at any time, and is attached to the main body of the dryer.
Both terminals of the contact are connected to both terminals of the drive switch constituted by contacts 170 and 210.

Next, the operation of this control circuit will be explained.

When the clothes are placed in the drum 1', the door is closed, and the timer 12 is set to an appropriate time, the door switch 11 and contacts 121 and 122 are turned on and the motor 120 starts rotating. At the same time, the motor 13 and the heater 14 are energized, and if the switch 16 is turned on, the heater 15 is energized, and hot air is sent into the rotating drum. Also, at the same time that the AC relay 17 operates and the contact 170 is turned off, the capacitor 20 is
Charging starts. After a certain period of time determined by the time constant of charging path a has passed, a discharge current flows through discharge path b, causing DC relay 21 to operate and contact 210 to turn on. In this way, at the start of drying, the solenoid 7 is not energized because the contacts 170 and 171 are turned off and on at different times.

When it is time for the drying to end, that is, when the timer connection time has elapsed, first the contact 122 is turned off and the power supply to the heater 14 (and the heater 15 when the switch 16 is turned on) is stopped. At the same time, the operation of AC relay 17 is also stopped and contact 170 is turned on. Further, from this point on, the charging current stops flowing, and the discharging current flows only through path b for a certain period of time determined by its time constant, so the contact 210 turns off after a certain period of time has elapsed. That is, the solenoid 7 is energized for a certain period of time from when the contact 170 is turned on until the contact 210 is turned off, and the nozzle 61 is pressed by the actuator 70. In this case, the time constant of the discharge path b is set to be extremely shorter than the 5 minute off time difference between the contacts 121 and 122 of the timer 12,
The charge removing agent is sprayed during the time when the drum 1' is on, that is, while the drum 1' is rotating. Therefore, the charge removing agent is sprayed evenly into the interior of the drum 1', and the liquid component of the charge removing agent is simultaneously evaporated due to residual heat.

After the charge remover is injected for a certain period of time during which a discharge current flows through path b to the DC relay 21, the contact 121 is turned off and the motor is turned off when the aforementioned off time difference of 5 minutes elapses between the contacts 121 and 122. 13 stops. At this stage, the charge caused by frictional electrification has been removed, so you may get an electric shock from static electricity when you open a door and put your hand in, or your clothes may catch on your shoes or emit sparks due to static electricity. There is no occurrence of so-called electrification phenomenon, and subsequent work including arranging clothes becomes extremely easy.

In addition, in this way, the charge remover is automatically injected at the end of drying, but relays 17 and 21 operate in the same way when the door is opened during drying.
The charge remover is also sprayed for a certain period of time. Therefore, whenever the door is opened and clothes are taken out, static electricity is removed. This provides operational convenience to the operator, especially when the timer time is set longer than necessary for the clothes placed in the drum.

By pressing the push-button switch 22, you can spray the static electricity remover at any time, so if you operate the switch 22 as appropriate, taking into account the amount and type of clothing, you can further ensure static electricity removal. It can be made into something.

As described above, according to the present invention, the inner circumferential surface of the drum and Automatically removes static electricity generated on the surface of clothes, making it much easier to take out clothes after drying and organize them afterwards.
This greatly improves the practical utility of using the dryer. Furthermore, when actually using a dryer, it is often difficult to know exactly how long the drying time is required depending on the amount and type of clothing. In this invention, even if the door is opened before the originally set timer time has elapsed, the static electricity is removed at that point. Since the agent is automatically sprayed, static electricity can be removed without any problem even when drying clothes for which the timer function cannot be used.

[Brief explanation of drawings]

FIG. 1 schematically shows the structure of a clothes dryer that is the premise of this invention, FIG. 2 shows the structure of a charge removal device for a clothes dryer that is an embodiment of this invention, and FIG. The circuit diagram of the control circuit of the machine is shown. 1, 1'...Drum, 2...Clothing, 3, 14, 15
…heater, 4…fan, 6…static charge removal device, 7
... Solenoid, 17... AC relay, 21... DC relay, a... Charging path, b... Discharging path.

Claims (1)

[Scope of Claims] 1. In a clothes dryer that dries clothes by rotating a drum containing clothes and sending hot air into the drum, a blower motor and a heater are controlled. a timer for turning off the motor after a certain period of time has elapsed after turning off the heater at the end of drying; a door switch that is linked to opening and closing of the door; and a charge remover injection device that sprays charge remover into the drum. switching means for controlling the injection device;
A clothes dryer comprising: control means for turning on a switching means for a predetermined period of time in accordance with the heater off operation of the timer and the off operation of the door switch to drive a charge remover injection device.