JP2005143531A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing machine which can prevent a water leakage resulting from a failure of the water supplying system from occurring, or can prevent a failure of an electric part or the like resulting from bubbles generated at the time of washing from occurring. <P>SOLUTION: This washing machine is equipped with a rotating drum 31 having the rotation axis in the horizontal direction or a tilted direction, a water receiving rub 33 which internally contains the rotating drum 31 and is elastically supported by a washing machine main body, a heater 47 for drying laundry, an air blowing fan 48, and a controlling means equipped with a pair of electrodes 54 in a vicinity of a warm air feeding port 51 of a warm air feeding pathway 49 above an overflow water surface 55, and controls a series of washing motions. The controlling means is constituted in a manner to sense water or bubbles across a pair of the electrodes. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a washing machine having a clothes drying function and having a rotating drum having a rotation center axis in a horizontal direction or an inclination direction.

  Conventionally, a washing machine in which this kind of rotating drum rotates about the central axis in the horizontal or inclined direction can supply water up to the water level set in the water receiving tub, and can perform washing, rinsing, dehydration and drying. And a water level detecting means for detecting the water level, and an overflow drainage section for draining the overflow water when the water level exceeds a certain level.

  Moreover, the warm air generated by the warm air generating means is sent from a blower opening provided on the side surface of the water receiving tank so as to dry the clothes (for example, see Patent Document 1).

  7, 8, and 9 show a conventional washing machine, and the configuration thereof will be described below. The rotating drum 1 is provided with a large number of water passage holes 2 on the entire outer periphery thereof and is rotatably disposed in the water receiving tank 3. A rotating shaft 4 is provided in the horizontal direction at the center of rotation of the rotating drum 1, and a motor 5 is connected to the rotating shaft 4 to rotate the rotating drum 1. Several protruding plates 6 are provided on the inner wall surface of the rotating drum 1.

  The water receiving tub 3 is suspended from the washing machine body 7 by a spring body 8 so as to be swingable. One end of the drainage connection hose 9 is connected to the lower part of the water receiving tub 3 and the other end of the drainage connection hose 9 is drained. The drainage hose 11 is connected to the other end side of the drainage pump 10 so as to drain the washing water in the water receiving tub 3. The drainage hose 11 connected to the drainage pump 10 is raised upward and once turned downward by 90 degrees or more at the height of the overflow surface 26. The water supply valve 12 supplies water into the water receiving tank 3.

  The blower fan 13, the heater 14, and the hot air blowing path 15 take in the air in the water receiving tank 3 from the hot air intake port 16 and blows air from the hot air blowing port 17. The water level detection means 18 detects the water level in the water receiving tank 3.

The control device 19 has a control means 20 constituted by a microcomputer, and controls the operations of the motor 5, the drainage pump 10, the water supply valve 12, the blower fan 13, the heater 14 and the like through the power switching means 21 to perform washing, A series of processes such as rinsing, dehydration, and drying are sequentially controlled. The input setting means 22 is for setting a driving course and the like. The control means 20 inputs information from the input setting means 22 and displays the display means 23 based on the information to notify the user. The commercial power supply 24 is connected and the power switch 25 is pressed to perform washing.
Japanese Patent Laid-Open No. 10-201991

  However, in such a conventional washing machine, it is possible to accurately determine an abnormality of overflow that cannot occur during normal washing in the case of an abnormality such as a failure of a water supply valve or a water level detection means or a failure in their signal transmission path and the control part. It may disappear. In particular, the water level detection means is often composed of a precise pressure sensor for detecting pressure, and is liable to cause a sensing failure. In this way, when the water level rises to the overflow level, if the water supply capacity is higher than the drainage capacity of the overflow drainage section, water will leak into the electrical parts due to water leakage from the inlet, etc. There is a risk that it may lead to expansion damage.

  The drying function is provided with a hot air intake port above the water receiving tank and a hot air blowing port below the water receiving tank. This is because warm air accumulates at the top, so that the drying efficiency is increased by taking in air from above and blowing from below. However, it reaches a level that is almost equivalent to the overflow level where the air outlet is lowered as much as possible. This makes it easier for bubbles generated during washing to enter from the air outlet as the water level rises. Water containing detergent is prone to foam, and the foam also has high electrical conductivity due to the detergent components.If foam enters, it adheres to electrical components such as heaters and fan motors, resulting in corrosion or electrical short-circuits, resulting in malfunctions, etc. It leads to trouble.

  The present invention solves the above-described conventional problems, and reliably detects overflow that occurs when the water supply system and the water level detection means malfunction, and occurs during washing as well as when the water supply system and the water level detection means malfunction. The purpose is to prevent the foam from being attached to the electrical part and causing a failure.

  In order to achieve the above object, the present invention provides a rotating drum having a central axis of rotation in a horizontal direction or an inclined direction, a water receiving tub containing the rotating drum and elastically supported by a washing machine body, and the water receiving tub. A water supply means for supplying water, a water level detection means for detecting the water level in the water receiving tank, an overflow drainage section provided on a side surface of the water receiving tank, for guiding the overflow water over the overflow surface toward the drain valve, A drainage means for draining water in the water receiving tank, a hot air generating means for drying the laundry, a hot air blowing path for guiding the warm air into the water receiving tank, and provided on the side of the water receiving tank, A hot air blowing port for introducing warm air into the water receiving tank, a pair of electrodes provided above the overflow surface near the hot air blowing port in the hot air blowing path, a series of washing operations, and the Water supply means, water level detection means, drainage means, hot air generation means and a pair of electrode signals And a Gosuru control means, said control means is one that is configured to detect the water or foam between the pair of electrodes.

  Thereby, when the water level in the water receiving tub cannot be maintained at the washing water level by controlling the water supply means or the drainage means due to failure of the water level detection means or abnormalities such as failure of their signal transmission path and the control part, When the water level reaches the level of overflow and drains constantly from the overflow drainage section, the water level rises when the water supply capacity is higher than the drainage capacity, and when water enters between a pair of electrodes slightly above the overflow surface, If a current flows and left as it is, it can be determined that water leaks.

  In addition, by detecting bubbles with a pair of electrodes, it adheres to electrical parts such as heaters and fan motors, and prevents further bubbles from entering so as not to cause corrosion or electrical short-circuiting. .

  The washing machine of the present invention reliably detects the overflow that occurs when the water supply system and the water level detection means malfunction, and bubbles generated during washing as well as when the water supply system and the water level detection means malfunction adhere to the electrical part. Thus, it is possible to prevent a failure or the like from occurring.

  A first invention is a rotating drum having a rotation center axis in a horizontal direction or an inclination direction, a water receiving tub containing the rotating drum and elastically supported by a washing machine body, and water supply for supplying water into the water receiving tub Means, a water level detecting means for detecting the water level in the water receiving tank, an overflow drainage section provided on a side surface of the water receiving tank, for guiding the overflow water exceeding the overflow surface in the direction of the drainage valve, and in the water receiving tank A draining means for draining water, a warm air generating means for drying the laundry, a warm air blowing path for guiding the warm air into the water receiving tank, and a side surface of the water receiving tank, the warm air is provided in the water A hot air blowing port to be introduced into the receiving tank, a pair of electrodes provided above the overflow surface near the hot air blowing port in the hot air blowing path, a series of washing operations, the water supply means, and a water level detection Means, draining means, hot air generating means and control means for controlling the signals of the pair of electrodes. In addition, since the control means is configured to detect water or bubbles between the pair of electrodes, water supply means or drainage means due to a failure of the water level detection means or an abnormality such as a failure in their signal transmission path and the control portion. If the water level in the water receiving tub cannot be kept at the washing water level by controlling the water level, the water level will rise if the water level reaches the overflow level and drains constantly from the overflow drainage section, and the water supply capacity is higher than the drainage capacity. When water enters between a pair of electrodes slightly above the overflow surface, a current flows between the electrodes, and if left as it is, it can be determined that water leaks. By detecting it, it is possible to prevent further bubbles from entering so as not to adhere to electric parts such as a heater and a fan motor and to be in a state of corrosion or electric short circuit.

  In the second invention, since the control means detects the resistance value between the pair of electrodes to detect water or bubbles between the pair of electrodes, a precise sensor such as a pressure sensor is used. It is possible to detect water or bubbles easily and reliably without any problems.

  In the third invention, since the control means detects the water or bubbles between the pair of electrodes and operates the drainage means to drain the water in the water receiving tank, the water level from the overflow level to the dangerous level is set. It is possible to prevent the bubbles from rising, or to prevent the bubbles from adhering to electric parts such as heaters and fan motors, and to prevent further bubbles from entering so as not to be in a state of corrosion or electric short circuit.

  In the fourth aspect of the invention, since the control means can detect the resistance value between the pair of electrodes and discriminate water or bubbles, it is possible to take an optimum countermeasure by overflowing or intruding bubbles. It is.

  In the fifth aspect of the invention, the control means is a binary value of the signal of the pair of electrodes and the signal of the water level detection means, so that it is possible to determine whether the detection between the pair of electrodes is water or foam. It is possible to accurately grasp the overflow or foam intrusion.

  6th invention is equipped with the display means which displays that the abnormality of overflow occurred, and when the thing detected between a pair of electrodes is water, a control means operates a drainage means and is in a water receiving tank. In addition to draining water, the display means displays that an abnormality of overflow has occurred. After detecting the overflow, drain immediately and prevent a dangerous state such as water leakage. This makes it possible for the user to grasp the state and prevent the same state from being repeated again.

  In a seventh aspect of the invention, when the control means detects bubbles between the pair of electrodes, the drainage means is operated to drain the water in the water receiving tank to a predetermined water level or all, and hot air is generated. Since the means is operated continuously or intermittently during and after the operation of the drainage means, further intrusion of bubbles can be prevented by draining. It is possible to operate the hot air generating means to push out the bubbles with the wind and to dry the surface so that the bubbles are not easily attached by heat.

  In the eighth aspect of the invention, the hot air generating means includes a heater and a blower fan, and the control means operates the blower fan and the heater of the hot air generator at the same time or the blower fan alone. A bubble discharging effect and a heat bubble adhesion preventing effect can be obtained, and the heater can be turned off to reduce power consumption.

  In the ninth aspect of the invention, the control means operates to supply water up to the predetermined water level by operating the water supply means after draining to a predetermined water level or all of the water, so if the water is supplied again and bubbles are detected, the bubbles cannot be erased. If the water is supplied again and no bubbles are detected, it is possible to distinguish the next optimum operation because the bubbles can be erased.

  In the tenth aspect of the invention, the control means operates the motor to rotate the rotating drum during drainage, after drainage is completed, after water supply or after water supply is completed, so that the water line swings and the bubbles are washed away. Can be erased.

  In the eleventh aspect of the invention, since the control means drains again when bubbles are detected by a pair of electrodes after the end of water supply, further intrusion of bubbles can be prevented.

  In the twelfth aspect of the invention, since the control means detects bubbles with a pair of electrodes, and repeatedly performs drainage, bubble elimination with hot air, and water supply until no bubbles are detected with the pair of electrodes. Bubbles can be erased more reliably.

  In a thirteenth aspect of the invention, the control means displays a bubble generation abnormality generated on the display means when the foam is detected by a pair of electrodes after repeating a predetermined number of times of drainage, bubble erasure by hot air, and water supply. Since it did in this way, while reducing consumption of water more than necessary, it can grasp | ascertain a state from displaying the abnormality of bubble generation | occurrence | production, and it can prevent repeating the same state again.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
As shown in FIG. 2, the rotating drum 31 is formed in a bottomed cylindrical shape, and a large number of water passage holes 32 are provided on the entire outer periphery, and are rotatably disposed in the water receiving tank 33. A rotation axis (rotation center axis) 34 is provided in the inclination direction at the rotation center of the rotary drum 31, and the axial center direction of the rotation drum 31 is inclined downward from the front side toward the back side. A motor 35 attached to the rear surface of the water receiving tank 33 is connected to the rotary shaft 34, and the rotary drum 31 is driven to rotate in the forward and reverse directions. Several protruding plates 36 are provided on the inner wall surface of the rotating drum 31.

  An opening provided in the upward inclined surface on the front side of the water receiving tub 33 is covered with a lid 37 so as to be freely opened and closed, and by opening the lid 37, the laundry can be taken in and out of the rotary drum 31 through the clothing entrance 38. ing. Since the lid body 37 is provided on the upward inclined surface, the laundry can be carried out without bending the waist.

  The water receiving tank 33 is suspended from the washing machine main body 39 by a spring body 40 and a damper 41 so as to be swingable. One end of the drainage path 42 is connected to the lower part of the water receiving tank 33 and the other end of the drainage path 42 is drained. The washing water in the water receiving tank 33 is drained by connecting to the valve 43. The water supply valve (water supply means) 44 supplies water into the water receiving tank 33 through the water supply path 45. The water level detection means 46 detects the water level in the water receiving tank 33.

  In the present embodiment, a rotation shaft 34 is provided in the tilt direction at the rotation center of the rotary drum 31, and the axial center direction of the rotary drum 31 is inclined downward from the front side toward the back side. However, the rotating shaft 34 may be provided in the horizontal direction at the rotation center of the rotating drum 31, and the axial center direction of the rotating drum 31 may be disposed in the horizontal direction.

  In FIG. 1, the structure of the drying function will be described with a cross section different from that in FIG.

  The drying function includes a heater 47, a blower fan 48, and a blower passage 49, and a hot air intake port 50 for taking in air in the water receiving tank 33 is provided at the back of the upper surface of the water receiving tank 33, and the hot air blower opening 51 is received by water. It is provided below the back surface of the tank 33 and heats and circulates the air in the water receiving tank 33 in the direction of the arrow to dry the laundry. In addition, an overflow inlet 53 of the overflow drainage 52 is provided in the front part of the lower surface of the water receiving tank 33, and a pair of electrodes 54 are provided in the vicinity of the warm air blowing port 51 in the warm air blowing path 49. The lowermost part of the overflow inlet 53 is an overflow surface 55, and the lowermost ends of the pair of electrodes 54 are at a position about 3 mm above the overflow surface 55. The pair of electrodes 54 are horizontally arranged and configured to have a space of about 25 mm.

  The control device 56 is configured as shown in FIG. 3, and controls the operation of the motor 35, the drain valve 43, the water supply valve 44, the blower fan 48, the heater 47, etc., and a series of washing, rinsing, dehydrating and drying. A control means 57 comprising a microcomputer for sequentially controlling the stroke is provided. The control means 57 inputs information from the input setting means 58 for setting the driving course, etc., displays the information on the display means 59 based on the information, notifies the user, and starts the operation by the input setting means 58. Is set, the data from the water level detecting means 46 for detecting the water level in the water receiving tank 33 is input and the drain valve 43, the water supply valve 44, the blower fan 48, and the heater 47 are input via the load driving means 60. Control the operation of the washing, drying operation.

  At this time, the control means 57 controls the rotation of the motor 35 by controlling the inverter circuit 63 via the drive circuit 62 based on the information from the position detection means 61 that detects the position of the rotor of the motor 35. ing. Although the motor 35 is a direct current brushless motor, although not shown, the motor 35 is composed of a stator having a three-phase winding and a rotor having a two-pole permanent magnet disposed on the ring. The stator has a three-phase winding. The first winding 35a, the second winding 35b, and the third winding 35c to be configured are wound around an iron core provided with a slot.

  The inverter circuit 63 is composed of a switching element composed of a parallel circuit of a power transistor (IGBT) and a reverse conducting diode. A series circuit of a first switching element 63a and a second switching element 63b, a series circuit of a third switching element 63c and a fourth switching element 63d, and a fifth switching element 63e and a sixth switching element 63f A series circuit is configured, and the series circuit of each switching element is connected in parallel.

  Here, both ends of the series circuit of the switching elements are input terminals, connected to a DC power source, and output terminals are respectively connected to connection points of two switching elements constituting the series circuit of the switching elements. The output terminal is connected to the U terminal, V terminal, and W terminal of the three-phase winding, and the U terminal, V terminal, and W terminal are connected by the on / off combination of two switching elements constituting the series circuit of the switching element. The three states are positive voltage, zero voltage, and release, respectively.

  The on / off of the switching element is controlled by the control means 57 based on information from the three position detection means 61a, 61b, 61c comprising Hall ICs. The position detection means 61a, 61b, 61c are arranged on the stator so as to face the permanent magnets of the rotor at an electrical angle of 120 degrees.

  During one rotation of the rotor, the three position detectors 61a, 61b, 61c each output a pulse at an electrical angle of 120 degrees. The control means 57 detects when the signal state of any of the three position detection means 61a, 61b, 61c changes, and based on the signals of the position detection means 61a, 61b, 61c, the switching elements 63a-63f. By changing the on / off state, the U terminal, the V terminal, and the W terminal are brought into three states of positive voltage, zero voltage, and release, and the first winding 35a, the second winding 35b, and the third winding of the stator. The coil 35c is energized to generate a magnetic field, and the rotor is rotated.

  The switching elements 63a, 63c, and 63e are each controlled by pulse width modulation (PWM), for example, by controlling the energization ratio of high and low at a repetition frequency of 10 kHz to control the rotational speed of the rotor. The control means 57 detects the cycle every time the signal state of any of the three position detection means 61a, 61b, 61c changes, calculates the rotational speed of the rotor from that period, and sets it to the set rotational speed. The switching elements 63a, 63c, and 63e are PWM-controlled.

  The current detection means 64 includes a resistor 65 connected to one input terminal of the inverter circuit 63 and a current detection circuit 66 connected to the resistor 65, detects the input current value of the inverter circuit 63, and outputs the output. This is input to the control means 57. When the motor 35 is a direct current brushless motor, the torque is substantially proportional to the input current. Therefore, the torque of the motor 35 is detected by detecting the input current value of the inverter circuit 63 by the current detection circuit 66 connected to the resistor 65. can do.

  The cloth amount detection means 67 detects the amount of laundry in the rotary drum 31 and is rotated by a signal from the current detection circuit 64 when the rotary drum 31 is raised to a predetermined rotation speed (for example, 200 r / min). The amount of laundry in the drum 31 is detected.

  The commercial power supply 24 is connected to the inverter circuit 63 via a DC power supply conversion device including a diode bridge 68, a choke coil 69, and a smoothing capacitor 70. However, this is an example, and the configuration of the DC brushless motor 35, the configuration of the inverter circuit 63, and the like are not limited thereto.

  A pair of electrodes 54 provided above the overflow surface 55 in the vicinity of the hot air blowing port 51 is connected to a resistance value determination circuit 70. Further, the resistance between the pair of electrodes is calculated in the water / bubble detecting means 71 in the control means 57 by comparing with the reference resistance in the resistance value determining circuit, and the water / bubble is determined. At this time, the resistance value appearing between the pair of electrodes is about 10 kΩ to 100 kΩ in the case of water, about 100 kΩ to about 500 kΩ in the case of foam, and 1 MΩ or more in the case of nothing.

  As shown in FIG. 4, the input setting means 58 includes a washing time setting switch 58a for setting the washing time, a rinsing frequency setting switch 58b for setting the rinsing frequency, a dehydration time setting switch 58c for setting the dehydration time, and a drying time. A drying time setting switch 58d, a start / pause switch 58e, a power-on switch 58f, and a power-off switch 58g. In addition, a first course setting switch 58h and a second course setting switch 58i are provided, and a drying setting switch 58j is further provided.

  The first course setting switch 58h is used to set the course to be operated. A course for performing a series of steps of washing, rinsing, dehydrating and drying, a course for performing each step of washing, rinsing and dehydration, and a drying step only. The course to be performed can be switched and set in the above order each time it is turned on.

  The second course setting switch 58i is used to switch between an automatic course, a rush course, a private course, a blanket course, a one-hour washing / drying course, and the like so that it can be switched in the above order each time it is turned on. Yes. The drying setting switch 58j is for setting a soft keep course in the drying process.

  The display means 59 includes a washing time display section 59a, a rinse count display section 59b, a dehydration time display section 59c, a drying time display section 59d and a course setting display section 59e for displaying the course set by the second course setting switch 58i. have. Further, it has a detergent amount display part 59f, a remaining time display part 59g, and a number display part 59h.

  Next, with respect to the washing machine configured as described above, the operation and action when water and foam are detected by a pair of electrodes during washing will be described with reference to FIG.

  Washing is started (step 101), and if the resistance value between the pair of electrodes 54 is 1 MΩ or more in step 102, there is no water / foam between the electrodes and the washing operation is continued. The process ends normally (step 104).

  If the resistance value is 1 MΩ or less in step 102, water or bubbles exist between the electrodes, and an abnormal sequence is entered.

  At this time, the resistance value between the electrodes is determined in step 105, and if it is 100 kΩ or less, it is determined that the water is completely flooded between the electrodes, and drainage is immediately started (step 117). Next, “H21” is displayed on the display means 59f to display that an abnormality of overflow has occurred (step 118), and this state is maintained (step 119). By holding the overflow error, it is possible to inform the user of the cause of the end of washing.

  In step 105, if the resistance value is 100 kΩ or more, it is determined that the bubble has a higher resistance value than water, and an operation for eliminating the bubble is performed.

  First, drainage is started (step 106), and the rotating drum is rotated (step 107) to promote the elimination of bubbles on the draft surface. In step 108, the heater and the fan are operated to blow the bubbles and dry the surface to erase the bubbles. When the water in the tank is gradually drained and drainage is completed to a predetermined water level (step 109), the operation of the rotating drum, heater, and fan is terminated (step 110), the bubble erasing operation is terminated, and water is supplied to the previous water level (step) 112).

  Thereafter, the resistance value between the electrodes is measured again in step 112, and if it is 100 kΩ or more, it is determined that the erasing of the foam is completed, and the normal washing operation is resumed. If it is determined in step 112 that the bubbles cannot be erased, the bubble erasing operation from the start of drainage in step 106 to the water supply in step 111 is repeated, and if the bubble erasing operation is repeated N times a predetermined number of times (step 113), The inside water is drained (step 114), and it is determined that the water is no more than that, the bubble generation abnormality is displayed as "U17" on the display means 59f (step 115), and the process ends in this state (step 116).

  In the heater / fan operation in step 108, it is possible to eliminate bubbles or dry the surface even if both the heater and fan are operated or only the heater is intermittently operated. Can be reduced. Further, after draining to the predetermined water level in step 109, if the heater and fan are operated for a certain period of time, a further bubble erasing effect can be obtained.

  As described above, when water or foam is detected between a pair of electrodes during washing, the water or foam is determined from the resistance value in each case. If the detected water is water, it is determined that the water is overflowing. As a failure, washing is stopped and drained so that it does not leak.

  Also, when foam is detected, it operates to erase the foam, and when the foam is completely erased, it returns to the washing operation. Because there are many, it is possible to display an abnormality, stop the washing operation once, and leave it until the foam disappears.

  Further, since the abnormality is displayed, it is possible to suggest to the user that the amount of detergent used is large.

  In particular, since overflow can be detected even in a state where the water level detection means is out of order, it can be said to be a double safety water leakage prevention means.

  The resistance value appearing between the electrodes in the first embodiment is merely an example, and may vary depending on conditions such as the distance between the electrodes.

(Embodiment 2)
In the present invention, an abnormality such as occurrence of foam abnormalities during washing or an increase in the water level up to the overflow level is discriminated by a signal binary value of a pair of electrodes and a water level detection means. This is the same as Embodiment 1 and will not be described in detail.

  The operation and action will be described with reference to FIG.

  Washing is started (step 101), and if the resistance value between the pair of electrodes 54 is 1 MΩ or more in step 102, there is no water / foam between the electrodes and the washing operation is continued. The process ends normally (step 104).

  If the resistance value is 1 MΩ or less in step 102, water or bubbles exist between the electrodes, and an abnormal sequence is entered.

  At this time, if a water level higher than a predetermined water level is detected from the signal of the water level detection means in step 120, an abnormality that the water level rises to the overflow level is determined, and if the water level detection means detects a predetermined water level or lower, The occurrence of bubble abnormality is determined, and the operation after overflow detection from step 117 to step 119 and the bubble erasing operation from step 106 to step 116 are performed in the same manner as in the first embodiment. Each operation is the same as that of the first embodiment, and the same reference numerals are given, and the description is omitted.

  According to this, since it is determined not only by the resistance value between the electrodes but also by the binary value of the water level detection means, it is possible to reliably determine water and bubbles, and it is possible to perform an optimum operation according to each state.

  As described above, the washing machine according to the present invention detects water or bubbles between a pair of electrodes and detects the occurrence of overflow or abnormal bubbles in a washing machine having a central axis of rotation in a horizontal direction or an inclined direction. Therefore, it is useful as a washing machine or the like having a prevention means that can protect electrical parts due to water, bubbles, and the like.

Side sectional view of the washing machine according to the first and second embodiments of the present invention. Side sectional view of the washing machine Partially block circuit diagram of the washing machine Enlarged front view of input setting means and display means of the washing machine Main part operation | movement flowchart of washing machine of Embodiment 1 of this invention Main part operation | movement flowchart of the washing machine of Embodiment 2 of this invention Side sectional view of a conventional washing machine Perspective view of a conventional washing machine with a part cut away Block diagram of a conventional washing machine

Explanation of symbols

31 Rotating drum 33 Water receiving tank 34 Rotating shaft (Rotating center shaft)
35 Motor 39 Washing machine body 40 Spring body 41 Damper 44 Water supply valve (water supply means)
46 Water level detection means 47 Heater 48 Blower fan 49 Warm air blow path 51 Hot air blow outlet 52 Overflow drainage part 53 Overflow inlet 54 Pair of electrodes 55 Overflow surface 57 Control means 58 Input setting means

Claims (13)

A rotating drum having a central axis of rotation in a horizontal direction or an inclined direction; a water receiving tank containing the rotating drum and elastically supported by a washing machine body; water supply means for supplying water into the water receiving tank; A water level detection means for detecting the water level in the tank, an overflow drainage section that is provided on a side surface of the water receiving tank and guides the overflowed water over the overflow surface toward the drain valve, and a drainage means for draining the water in the water receiving tank A warm air generating means for drying the laundry, a warm air blowing path for guiding the warm air into the water receiving tub, and a side surface of the water receiving tub, and introducing the hot air into the water receiving tub. A pair of electrodes provided above the overflow surface in the vicinity of the hot air blowing port of the hot air blowing path, a series of washing operations, the water supply means, the water level detection means, the drainage means, the temperature, Control means for controlling the wind generating means and the signals of the pair of electrodes, Washing machine stage configured to sense water or foam between the pair of electrodes. The washing machine according to claim 1, wherein the control means detects a resistance value between the pair of electrodes to detect water or bubbles between the pair of electrodes. The washing machine according to claim 1 or 2, wherein when the control means detects water or bubbles between the pair of electrodes, the drain means is operated to drain the water in the water receiving tank. A rotating drum having a central axis of rotation in a horizontal direction or an inclined direction; a water receiving tank containing the rotating drum and elastically supported by a washing machine body; water supply means for supplying water into the water receiving tank; A water level detection means for detecting the water level in the tank, an overflow drainage section that is provided on a side surface of the water receiving tank and guides the overflowed water over the overflow surface toward the drain valve, and a drainage means for draining the water in the water receiving tank A warm air generating means for drying the laundry, a warm air blowing path for guiding the warm air into the water receiving tub, and a side surface of the water receiving tub, and introducing the hot air into the water receiving tub. A pair of electrodes provided above the overflow surface in the vicinity of the hot air blowing port of the hot air blowing path, a series of washing operations, the water supply means, the water level detection means, the drainage means, the temperature, Control means for controlling the wind generating means and the signals of the pair of electrodes, Stage by detecting the resistance value between the pair of electrodes, can and the washing machine to determine whether the water or foam. A rotating drum having a central axis of rotation in a horizontal direction or an inclined direction; a water receiving tank containing the rotating drum and elastically supported by a washing machine body; water supply means for supplying water into the water receiving tank; A water level detection means for detecting the water level in the tank, an overflow drainage section that is provided on a side surface of the water receiving tank and guides the overflowed water over the overflow surface toward the drain valve, and a drainage means for draining the water in the water receiving tank A warm air generating means for drying the laundry, a warm air blowing path for guiding the warm air into the water receiving tub, and a side surface of the water receiving tub, and introducing the hot air into the water receiving tub. A pair of electrodes provided above the overflow surface in the vicinity of the hot air blowing port of the hot air blowing path, a series of washing operations, the water supply means, the water level detection means, the drainage means, the temperature, Control means for controlling the wind generating means and the signals of the pair of electrodes, Stage, washing machine with two values of the signal of the signal and the water level sensing means of said pair of electrodes, those detected between the pair of electrodes made it possible to determine whether the water or foam. Provided with a display means for displaying that an abnormality of overflow has occurred, the control means operates the drainage means to drain the water in the water receiving tank when the water detected between the pair of electrodes is water, The washing machine according to any one of claims 1, 2, 4, and 5, wherein the display means displays that an abnormality of overflow has occurred. The control means operates the drainage means to drain the water in the water receiving tank to a predetermined water level or all when the detected between the pair of electrodes is foam, and the hot air generating means is connected to the drainage means. The washing machine according to any one of claims 1, 2, 4, and 5, wherein the washing machine is operated continuously or intermittently during and after the operation. The washing machine according to claim 7, wherein the hot air generating means includes a heater and a blower fan, and the control means operates the blower fan and the heater of the hot air generator simultaneously or simultaneously with the blower fan alone. The washing machine according to claim 7 or 8, wherein the control means operates to supply water to a predetermined water level by operating the water supply means after draining to a predetermined water level or after draining all. The washing machine according to any one of claims 7 to 9, wherein the control means operates the motor to rotate the rotating drum during drainage, after drainage is completed, after water supply or after water supply is completed. The washing machine according to any one of claims 7 to 10, wherein the control means drains again when bubbles are detected by a pair of electrodes after the end of water supply. 12. The control means according to any one of claims 7 to 11, wherein after the bubbles are detected by the pair of electrodes, the bubbles are erased, the bubbles are erased by hot air, and the water supply is repeatedly performed until the bubbles are not detected by the pair of electrodes. The washing machine according to item 1. The control means is configured to display the generation abnormality of the foam generated on the display means when the foam is detected by the pair of electrodes after repeating the drainage, the bubble erasing by the warm air, and the water supply for a predetermined number of times. The washing machine according to any one of -12.

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