JPH08150295A - Clothing dryer - Google Patents

Abstract

PURPOSE: To provide a clothing dryer capable of recognizing the amount of fed clothing to prevent drying unevenness by equipping a load detection means to detect the load to a motor to drive rotation of a drum and a load display means to display the detected load. CONSTITUTION: Since linear relation is realized between the electric duty to a driving motor of a drying drum and the load acting on the motor, it is possible to judge the size of load by a designated value of electric duty. Consequently, this clothing dryer is constituted to show a load state by controlling the number of emitting LED 33a-33h of a load state display part 33. To put it concretely, the electric duty of 0-100% to the motor is divided into eight grades, a case in which the value of electric duty belongs to the smallest grade is designated the smallest load, a case in which the value of the electric duty belongs to the seventh grade is designated to be the rating load, and a case in which the value of the electric duty belongs to the eighth grade is designated to be an over load.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clothes dryer configured to dry clothes by rotating a drum containing the clothes by a motor.

[0002]

2. Description of the Related Art In this type of dryer, an electrode for contacting clothes in a drum is provided, the drying rate of clothes is detected by this electrode, and the end time of the drying operation is judged based on this drying rate. In some cases, the drying operation is automatically terminated. With this configuration, the user can automatically dry the clothes by operating the start switch after putting the clothes in the drum, which is a very convenient structure.

[0003]

In the above conventional construction, when the amount of clothes put in the drum is large, when the drying operation is considerably advanced, the clothes which are sufficiently dried and the non-dried clothes which are not yet dried (dry) The above-mentioned clothes are mixed with each other, that is, unevenness in drying of the clothes easily occurs. In this situation, the electrodes detect the drying rate of the dried clothes,
It may be mistakenly determined that the end of the drying operation has been reached.
If the above-mentioned erroneous determination is made, there is a problem that undried clothes are mixed when the drying operation is finished, that is, unevenness of drying occurs. In particular, when the user puts on too much clothes, there is a high possibility that the above-mentioned drying unevenness may occur.

However, since the dryer having the conventional structure does not have a display device for letting the user know how much the amount of clothes in the drum is, does the user have a large amount of clothes he or she put in? I could hardly recognize whether it was a small amount or an appropriate amount. Therefore, even if the clothes are thrown in too much and undried occurs (the undried clothes are left and mixed), the user cannot understand that the cause is that the clothes are thrown in too much.

Therefore, an object of the present invention is to make it possible for the user to recognize the amount of clothes thrown in the drum,
It is an object of the present invention to provide a clothes dryer capable of preventing unevenness in drying as much as possible.

[0006]

The clothes dryer of the present invention comprises:
A drum for accommodating clothes, a motor for rotationally driving the drum, a load detecting means for detecting a load applied to the motor, and a load displaying means for displaying the load detected by the load detecting means. It has characteristics. In the case of this configuration, it is preferable that when the load detection unit detects an overload, the load display unit displays that the load is overloaded. Further, it is preferable that a buzzer be sounded when an overload is detected.

Further, a speed detecting means for detecting the rotation speed of the motor is provided, and a speed control means for controlling the speed of the motor so that the rotation speed of the motor becomes equal to the target rotation speed by phase controlling the electric power applied to the motor. It is more preferable that the load display means is configured to display the load based on the energization duty during the phase control of the motor. Further, it is preferable that the load display means displays that the load detection operation is being performed.

[0008]

According to the above means, the load on the motor for rotating the drum is detected to detect the amount of clothes put in the drum, and the load display means detects the load, that is, the amount of clothes. Is displayed.
In the case of this configuration, the user can accurately recognize whether the amount of put-in clothes is large, small, or appropriate by visually recognizing the display of the load display means. Therefore, the user can adjust the amount of clothes to be thrown in so as to prevent uneven drying.

Further, when the load detecting means detects the overload and the load indicating means indicates that the load is overloaded, it can be clearly understood that the excessive amount of clothes has been put in.
You can easily recognize the need to reduce clothing. Furthermore, if the buzzer is configured to ring when an overload is detected, the user can immediately recognize that the clothing is overloaded simply by hearing the buzzer ringing without looking at the overload display. it can.

By the way, in a configuration having a function of detecting the rotation speed of the motor and controlling the phase of the electric power applied to the motor so that the rotation speed of the motor becomes equal to the target rotation speed, The energizing duty during control corresponds to the load in a linear relationship. Therefore, when the load is displayed on the load display means based on the energization duty, the phase control structure can also be used as the load detection means, and the structure for displaying the load can be an inexpensive structure. It can be easily realized. Furthermore, if the load display means is configured to display that the load detection operation is being performed, the user can clearly recognize that the load detection operation is being performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, in FIG. 3 showing the schematic overall structure of the clothes dryer, an entrance / exit 2 for putting in and taking out clothes is provided in the center of the front surface of the outer box 1, and a door 3 for opening / closing the entrance / exit 2 is provided. There is. A drum 4 for accommodating clothes is rotatably provided in the outer box 1. In this case, a shaft 5 projecting from the center of the rear surface of the drum 4 is rotatably supported by a support plate 6 provided in the rear portion of the outer box 1, and is provided at the peripheral portion of the front opening of the drum 4. The cylindrical flange portion 7 is rotatably supported by a drum support 8 provided in the front portion of the outer box 1.

The drum 4 is configured to be rotationally driven by a motor 9 arranged at a lower rear portion of the outer box 1 via a belt transmission mechanism 10. The belt transmission mechanism 10 includes a belt 13 wound around a pulley 12 attached to a front end of a rotary shaft 11 of a motor 9 and an outer periphery of a drum 4, and a tension pulley 14 that applies tension to the belt 13. It is configured. The motor 9 is composed of, for example, a capacitor motor (single-phase induction motor).

A warm air supply device for supplying warm air to the drum 4 is disposed in the outer box 1. The warm air supply device will be described below. The fan 15 of the warm air supply device is rotatably provided on the rear support plate 6 in the outer box 1 via a shaft 16. The fan 15 is composed of a double-bladed fan that also functions as a heat exchange type dehumidifier, and is configured to be rotationally driven by a motor 9 via a belt transmission mechanism 17. Further, the fan 15 includes a fan housing portion 2 including a fan casing portion 18 integrally provided on the outer peripheral portion of the support plate 6 and a rear plate 19 of the outer box 1.
It is accommodated in the fan housing section 20 and is partitioned so as to partition the inside of the fan housing section 20 into front and rear.

The central portion on the front side of the fan housing portion 20 has a vent hole 21 formed in the center of the rear portion of the drum 4 and a large number of small holes formed in the support plate 6. It is communicated with the inside of the drum 4 through the communication port 22. Further, the peripheral portion on the front side in the fan housing portion 20 communicates with a rear end portion of a duct (not shown) provided in one corner of the outer box 1 so as to extend in the front-rear direction. The front end portion of the duct communicates with the inside of the drum 4 through a warm air outlet formed by a large number of small holes formed in the drum support 8. A heater 23 (see FIG. 4) is arranged on the drum support 8 so as to be located at the front end of the duct. As shown in FIG. 4, the heater 23 is composed of, for example, two PTC heaters 23a and 23b.
A filter set 24 is removably attached to the vent hole 21 of the drum 4 from the inside of the drum 4. On the other hand, the rear plate 19 of the outer box 1 is formed with an outside air intake port 25 at its central portion and an outside air return port 26 at its peripheral portion.

In the case of this structure, when the fan 15 is rotationally driven by the motor 9, the air in the drum 4 causes the air in the drum 4 to flow through the ventilation port 21 and the communication port 22.
Is sucked to the front side of the fan 15 through this, and the sucked air flows through the front side of the fan 15 and is then sent to the heater 23 through the duct to be heated. It is configured to be sent into the drum 4 through the hot air outlet and circulated. On the other hand, due to the air blowing action on the rear side of the fan 15, the outside air (cooling air) sucked from the outside air intake 25 flows through the rear side of the fan 15 and is then discharged through the outside air return port 26. There is. At this time, the cooling air flowing on the rear side of the fan 15 cools the warm air flowing on the front side of the fan 15 to dehumidify it.

Further, the drum 4 is provided below the drum support 8.
A pair of electrodes 27 is provided so as to face the inside. The clothes housed in the drum 4 are configured to come into contact with the electrodes 27 intermittently according to the rotation of the drum 4, and the resistance value between the electrodes 27 is lower than the steady value at each contact. It is changing. In this case, the resistance value between the electrodes 27 changes such that the smaller the amount of water contained in the contacting clothes, in other words, the higher the drying rate of the clothes, the larger. Thereby, the drying rate of the clothes can be determined based on the detection of the resistance value between the electrodes 27.

Further, a temperature sensor 28 is arranged on the rear surface side of the support plate 6. The temperature sensor 28 is for detecting the temperature of the air in the drum 4, that is, the temperature of the air flowing from the inside of the drum 4 to the front side of the fan 15 via the ventilation port 21 and the communication port 22. An operation panel 29 is arranged below the front surface of the outer box 1. Various operation switches 30 (see FIG. 4) are provided on the operation panel 29.
And a power switch 31 (see FIG. 4).
Further, the operation panel 29 is provided with a setting content operation state display section 32 (see FIG. 4) for displaying the setting content of the drying course and the operation state of the operation, and a load display means for displaying the magnitude of the load. A load state display section 33 (see FIG. 4) is provided.

The load state display section 33 is for displaying, for example, the amount of clothes put in the drum 4 as a load, and as shown in FIG. 1, eight LEDs 33a to 3 are provided.
3h is arranged in a line. In this case, the state where only one LED 33a on the left end is lit represents the minimum load, and the load increases as the right LED is lit. Then, from the LED 33a to the LED
The state of lighting up to 33g indicates the rated load, and LED3
The state of lighting from 3a to the LED 33h indicates an overload. The load status display section 33 constitutes load display means. The setting content operating state display section 32 is composed of a display device including a plurality of well-known LEDs and the like.

An electronic unit 34 is arranged on the back side of the operation panel 29 in the lower front portion of the outer box 1. In this electronic unit 34, electronic parts that constitute a control circuit and a peripheral circuit for controlling the drying operation are arranged.

On the other hand, on the rear side of the motor 9, for example, a rotation sensor 35 is provided as a pulse signal generating means for generating a pulse signal according to the rotation of the rotary shaft 11 of the motor 9. The rotation sensor 35 is configured as, for example, a magnetic rotary encoder. Specifically, the rotation sensor 35 includes a permanent magnet 37 provided on the front peripheral portion of a pulley 36 (a pulley forming a part of the belt transmission mechanism 17) attached to the rear end of the rotary shaft 11, and a motor. 9, a support frame 38 and a Hall IC 39 provided so as to face the rotation trajectory of the permanent magnet 37.

The rotation sensor 35 is configured to generate one pulse signal from the Hall IC 39 each time the rotation shaft 11 (that is, the pulley 36 and the permanent magnet 37) makes one rotation. In this case, the cycle of the pulse signal output from the Hall IC 39 corresponds to the rotation speed of the motor 9. Therefore, by detecting the period of the pulse signal generated from the rotation sensor 35, the rotation speed of the motor 9 and thus the rotation speed of the drum 4 can be detected. It is also preferable to attach a plurality of permanent magnets to the pulley 36 so that a plurality of pulse signals are generated from the Hall IC 39 each time the rotating shaft 11 of the motor 9 makes one rotation. Further, the rotation sensor may be configured by an optical rotary encoder (a configuration using a photoelectric switch).

In FIG. 4, which schematically shows the electrical configuration in the form of a combination of functional blocks, a control circuit, for example, a microcomputer 40 stores a control program for controlling the overall drying operation, Each function as a detection means, a speed detection means, and a speed control means is provided. The power of the microcomputer 40 is supplied from an AC power supply 41 via a rectifier circuit 42. Then, in the microcomputer 40,
A clock pulse signal is supplied from the clock pulse generation circuit 43.

Further, a signal indicating the drying rate of the clothes from the electrode 27 is applied to the microcomputer 40 via the detection circuit 44. Further, the microcomputer 40 is supplied with switch signals from various operation switches 30, temperature detection signals from the temperature sensor 28, and pulse signals from the rotation sensor 35. In this case, the microcomputer 40 is configured to detect (determine) the rotation speed of the motor 9 based on the applied pulse signal from the rotation sensor 35. In addition, the microcomputer 40 is configured to receive a switch signal from a door switch (not shown) that detects the open / closed state of the door 3.

Then, the microcomputer 40 controls the switching of the notification buzzer 45 and the PTC heaters 23a and 23b through the drive circuit 46, and the motor 9 through the phase control drive circuit 47. Is configured to control. The motor 9 and the PTC heater 2
An AC power supply 41 is connected to 3 a and 23 b so as to be supplied via a power switch 31. Here, the phase control drive circuit 47 includes a triac provided in the energizing path so that the motor 9 is electrically disconnected and connected, and a phototriac coupler provided between the gate terminal of the triac and the microcomputer 40. It consists of and. The triac is a microcomputer 4
When it is turned on (turned on) through the phototriac coupler by 0, it is turned off (turned off) when the voltage level of the alternating-current power supply 41 becomes zero (at the zero crossing point). . In addition, the microcomputer 4
To 0, a signal which detects a time point (zero cross point) when the voltage level of the AC power supply 41 becomes zero is given from a zero cross detection circuit (not shown).

As a result, the microcomputer 40
Adjusts the energization duty (energization ratio) to the motor 9 to a desired value by variably controlling the timing (conduction angle) for conducting the triac from the time of detecting the zero cross of the AC power supply 41, that is, the motor. 9 is configured to be able to control the phase of the AC power supplied to 9. In this case, the microcomputer 40 is configured to be able to continuously or stepwise variably control the energization duty to the motor 9 from 0% (disconnected state) to 100% (fully energized state) (graph in FIG. 1). reference).

Further, the microcomputer 40 is configured to drive and control the setting content operation state display section 32 and the load state display section 33. Here, the circuit configuration of the load state display unit 33 is specifically shown in FIG. As shown in FIG. 2, the eight LEDs 33a of the load state display unit 33
33 h is connected in series with each of the limiting resistors 49 a to 49 h between each of the eight control ports 40 a to 40 h of the microcomputer 40 and the DC constant voltage terminal 48. In this case, the microcomputer 40 sets each of the control ports 40a to 40h to a low level to cause each of the LEDs 33a to 33h to emit light, and each of the control ports 40 to 40h.
Each LED by setting a to 40h to high level
It has a configuration capable of extinguishing 33a to 33h.

Next, the operation of the above configuration will be described with reference to FIG. The flowchart of FIG. 5 mainly shows the control contents of the rotation speed control of the motor 9 and the display control of the load state display unit 33 in the control program stored in the microcomputer 40. As shown in FIG. 5, when the power switch 31 is turned on, the door 3 is closed, and the start switch in the operation switch 30 is turned on, the microcomputer 40 proceeds to steps S1, S2, S3. Then, the process proceeds to “YES” to start energizing the motor 9 and the heater 23 (step S4).

In this case, when the motor 9 is energized,
That is, when the motor 9 is started, the energization duty to the motor 9 is fixed (set) to 80%, for example, and the phase is controlled. This energizing duty is 80
The energized state fixed to% is executed for a set time, for example, 3 seconds from the start of energization (step S
5). In this embodiment, the energization duty is fixed to 80% and the motor 9 is started, but the energization duty of other values may be fixed. It is also preferable to set the energization duty to be successively increased to, for example, 40%, 60%, and 80% every one second, so that the motor 9 is so-called slow-started. Further, the heater 23 is connected to the motor 9
Although it is configured to start energization at the same time, it is preferable that, instead of energizing the motor 9, energization of the heater 23 is started after a predetermined time (for example, 3 seconds) has elapsed.

When the motor 9 is energized as described above, the rotation speed of the motor 9 gradually increases, and the rotation speed of the drum 4 also gradually increases. After the set time has elapsed, “YES” in step S5.
Then, the microcomputer 40 detects the rotation speed of the motor 9 and phase-controls the electric power supplied to the motor 9 so that the detected rotation speed N0 becomes equal to the target rotation speed N (so-called speed control). Feedback control).

Specifically, the microcomputer 40
Detects the rotation speed N0 of the motor 9 based on the pulse signal from the rotation sensor 35 (step S6). In this case, the pulse signal from the rotation sensor 35 is counted for a fixed time (for example, 5 seconds), and the rotation speed N0 of the motor 9 is detected from this count value. In other words, the rotation speed N0 of the motor 9 is detected at every fixed time.

Then, the detected rotation speed N0 is compared with the commanded target rotation speed N to adjust the energization duty. In this case, first, it is determined whether or not the rotation speed N0 and the target rotation speed N are equal (step S7). Here, when N0 = N, the energization duty that has been set up to that point is output without change and set (step S8). On the other hand, if N0 and N are not equal, the process proceeds to "NO" in step S7, and it is determined whether N0 is larger than N (step S9).

Here, when N0 is smaller than N,
In step S9, the process proceeds to "NO", and the energization duty set up to that point is changed so as to be increased (increased) and output (step S10). On the other hand, if N0 is larger than N, the process proceeds to "YES" in step S9, and the energization duty set up to that point is changed so as to be reduced (decreased) and output (step S1).
1). The width for increasing or decreasing the energization duty may be a fixed value, or a value determined according to the speed difference between N0 and N to be larger as the speed difference is larger (smaller as the speed difference is smaller). But good. Further, the configuration is such that the energization duty is not changed when N0 = N,
Alternatively, when the difference between N0 and N is smaller than a predetermined value, the energizing duty may not be changed.

Subsequently, the microcomputer 40 stores the output energization duty in the internal memory (step S12). After that, the microcomputer 40 sets the motor 9 at the stored energization duty.
Is energized by phase control, and the load state (clothing amount) is displayed by causing the LEDs 33a to 33h of the load state display unit 33 to emit light based on the energization duty (step S).
13).

In this case, as shown in FIG. 1, since a linear relationship is established between the energization duty to the motor 9 and the load amount (load state) acting on the motor 9, depending on the set energization duty value. Determine the load size (detection)
You can do it. Therefore, in displaying the load state, the number of LEDs 33a to 33h of the load state display unit 33 to be emitted is increased or decreased according to the value of the duty of energizing the motor 9. Specifically, the energization duty to the motor 9 is divided into 8 stages from 0% to 100%, the minimum load is set when the energization duty value belongs to the minimum stage, and the energization duty value belongs to the 7th stage. Rated load and energization duty value is 8
Overload is when it belongs to the stage.

When the load is minimum, that is, when the value of the energizing duty belongs to the minimum level, one LED 3
Only 3a is made to emit light. Below, each time the load increases,
That is, each time the value of the energization duty increases, the number of LEDs to be emitted increases one by one to the right (L
ED33b, LED33c, ... are sequentially emitted to increase the number). Then, at the rated load, that is, when the value of the energization duty belongs to seven levels, the seven LEDs 33a to
The LED 33g is caused to emit light. Further, in the case of overload, that is, when the value of the energization duty belongs to eight levels, the eight LEDs 33a to 33h are configured to emit light.

Subsequently, the process proceeds to step S14, and it is determined whether or not the load is overload, specifically, whether or not the energization duty belongs to eight stages which are larger than the rating. Here, if the energization duty belongs to eight stages that are larger than the rating, “YES” in step S14.
Then, the buzzer 45 is activated (step S15). The ringing of the buzzer 45 allows the user to immediately recognize that he or she put too much clothes (laundry) into the drum 4 without looking at the load state display portion 33. If the energization duty does not belong to any of the eight stages that are higher than the rated value, the process proceeds to "NO" in step S14. Then, the process proceeds to step S16 to execute various processes of normal drying operation. Here, for example, a process of detecting the drying rate of clothes, a process of detecting the temperature inside the drum 4, a process of determining a drying end time based on the detected drying rate and the temperature inside the drum 4, and a setting content operation state It is configured to perform a process of driving the display of the display unit 32 to display the operation state, a process of adjusting the output of the heater 23, and the like.

Subsequently, it is determined whether or not the drying operation is completed (step S17). If not completed, the process proceeds to "NO" in step S17 to detect the rotation speed of the motor 9 (step S6). ). Hereinafter, the rotation speed control of the motor 9 and the drying operation control are repeatedly executed until the completion of the drying operation is determined. When it is determined that the drying operation has ended, the process proceeds to “YES” in step S17, and the well-known soft keep operation is executed until the door 3 is opened or for a predetermined time (for example, 2 hours). .

According to this embodiment having such a structure, the load on the motor 9 for rotating the drum 4 is detected to detect the amount of clothes put in the drum 4, and the load state display section The above-described detected load (that is, the amount of clothes) is displayed by the LEDs 33a to 33h of 33. Thereby, the user visually recognizes the display mode (the number of emitted light) of the LEDs 33a to 33h of the load state display unit 33 to determine whether the amount of clothes put in the drum 4 is large, small, or an appropriate amount. You can recognize exactly if there is. Therefore, unlike the conventional configuration,
The user can adjust the amount of clothes thrown into the drum 4 so as to prevent uneven drying. Specifically, when the dry operation is started, the load state is displayed immediately. Therefore, if you notice that the amount of clothes is too large, the operation is temporarily stopped and a part of the clothes is taken out from the drum 4 to reduce the amount. be able to. As a result, when the drying operation is finished, it is possible to prevent problems such as undried clothes being mixed (unevenness in drying occurs) as much as possible.

Further, in the above embodiment, when the detected load (amount of clothes) is determined to be overload, the fact is displayed on the load state display unit 33, so that the user can It is possible to clearly recognize that too much clothes have been put inside, and it is possible to easily reduce the amount of clothes. Further, in the above-described embodiment, the buzzer 45 is made to ring when it is determined that the buzzer 45 is overloaded. You can immediately recognize that you have put too much clothing just by listening to the ringing, further improving usability.

Furthermore, in the above embodiment, the rotation speed of the motor 9 is detected, and the power supplied to the motor 9 is phase-controlled so that the rotation speed of the motor 9 becomes equal to the target rotation speed. In the clothes dryer having the above, since the load is displayed on the load state display unit 33 based on the energization duty at the time of phase control of the motor 9, the phase control configuration can also be used as the load detection means. The configuration for displaying the load can be easily realized with an inexpensive configuration.

In the above-described embodiment, after the point of time when feedback control is performed so that the rotation speed of the motor 9 becomes equal to the target rotation speed N (step S13 in FIG. 5).
In the above), the configuration is such that the LEDs 33a to 33h of the load state display unit 33 are caused to emit light based on the energization duty to the motor 9 to display the load (clothing amount), but instead of this, the rotation speed of the motor 9 is to some extent. After reaching a stable speed (speed close to the target rotation speed), the load may be displayed based on the energization duty at that time. In this case, specifically, after the motor 9 is started, for example, after a time of about 30 seconds or 1 minute has elapsed, the load may be displayed based on the energization duty at that time. Alternatively, during feedback control of the rotation speed of the motor 9, it is also preferable to display the load based on the energization duty after the time point when it is determined that the target rotation speed is reached.

If the load (clothing amount) is not displayed until 30 seconds, 1 minute, etc. have elapsed since the motor 9 was started as described above, the user may find that the load state display section 33 has failed. There is a risk of erroneously determining that it may have been done. On the other hand, from the start of the motor 9 (starting the operation) to the start of displaying the detected load on the load state display unit 33, as in the modification shown in FIG. The LEDs 33a to 33h of 33 are sequentially emitted one by one, for example, from left to right, and after the rightmost LED 33h is emitted, the leftmost LED 33a is again emitted.
It is preferable that the display is repeated by repeatedly emitting light. Then, such a load state display unit 3
If it is stated in the manual, etc. that the display mode of 3 is the display of "load detection operation in progress", the user can clearly recognize that the load detection operation is in progress, and worry that it may have broken down. There is nothing to do.

In the above embodiment, the load applied to the motor 9 is detected based on the energization duty to the motor 9, but the invention is not limited to this. For example, the rotation speed when the motor 9 is started. The load applied to the motor 9 may be detected based on the length of the rising time. In addition, the magnitude of the load current of the motor 9 is detected,
A configuration in which the load applied to the motor 9 is detected based on the detected load current is also preferable. Further, the slip of the motor 9 may be detected, and the load applied to the motor 9 may be detected based on the detected slip.

[0044]

As is apparent from the above description, the present invention detects the amount of clothes put in the drum by detecting the load applied to the motor that rotationally drives the drum, and the load display means detects the load. The detected load, that is,
Since the amount of clothes is displayed, the user can accurately recognize whether the amount of clothes put in is large, small, or appropriate by visually observing the display of the load display means. It has an excellent effect.

Further, when the load detection means detects an overload, the load display means indicates that it is overloaded, so that it can be clearly understood that too much clothes have been put in, and the clothes can be reduced. It will be possible. In this case, if the buzzer is configured to ring when it is detected that an overload has occurred, the user can listen to the buzzer ringing without overloading the clothes without looking at the overload indication. Can be recognized immediately.

Further, in the structure having a function of detecting the rotation speed of the motor and controlling the phase of the electric power applied to the motor so that the rotation speed of the motor becomes equal to the target rotation speed, Since the load is displayed on the load display means based on the above, the configuration for phase control can also be used as the load detection means, and the configuration for displaying the load can be easily realized with an inexpensive configuration. You can On the other hand, if the load display means is configured to display that the load detection operation is being performed, the user can clearly recognize that the load detection operation is being performed.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a characteristic diagram showing a relationship between energization duty and load amount and a top view of a load state display section.

FIG. 2 is an electric circuit diagram around the load state display section.

FIG. 3 is a schematic vertical sectional side view of the clothes dryer.

FIG. 4 is a block diagram.

FIG. 5: Flow chart

FIG. 6 is a diagram showing a modified example of the present invention, showing an operating state of a load state display section.

[Explanation of symbols]

1 is an outer box, 3 is a door, 4 is a drum, 9 is a motor, 11 is a rotating shaft, 15 is a fan, 27 is an electrode, 29 is an operation panel,
Reference numeral 33 indicates a load state display section (load display means), 33a to 33.
h is an LED, 34 is an electronic unit, 35 is a rotation sensor,
36 is a pulley, 37 is a permanent magnet, 39 is a Hall IC, 4
Reference numeral 0 represents a microcomputer (load detection means, speed detection means, speed control means), and 45 represents a buzzer.

Claims (5)

[Claims] 1. A drum for accommodating clothes, a motor for rotationally driving the drum, a load detection unit for detecting a load applied to the motor, and a load display unit for displaying a load detected by the load detection unit. A clothes dryer equipped. 2. The clothes dryer according to claim 1, wherein when the load detection means detects an overload, the load display means indicates that the load is overloaded. 3. A speed detection means for detecting the rotation speed of the motor, and a speed control means for controlling the speed of the motor so that the rotation speed of the motor becomes equal to a target rotation speed by phase controlling the electric power applied to the motor. The clothes dryer according to claim 1 or 2, further comprising: a load display unit configured to display a load based on an energization duty during phase control of the motor. 4. The clothes dryer according to claim 2, further comprising a buzzer that sounds when an overload is detected. 5. The clothes dryer according to claim 1, wherein the load display means is configured to display that the load detection operation is being performed.