JP2013052062A - Drum-type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To report that it is forgotten to remove a fixing metal fitting from a product during transportation to prevent a trouble.SOLUTION: A drum-type washing machine allows a drum 78 to rotate around a first resonance frequency of a water tank unit 76 of a vibration system in a diagnosis for determining whether to forget to remove a fixing metal fitting 84, which is performed at the beginning of an installation diagnosis operation, and allows an acceleration detection unit 39 to detect a vibration component of the water tank unit 76 by using an acceleration sensor 88, and determines that it is forgotten to remove the fixing metal fitting 84, when the vibration component is smaller than a preset reference value. Accordingly, the machine can accurately detect that it is forgotten to remove the fixing metal fitting 84 during transportation by the installation diagnosis operation, to prevent a dewatering vibration abnormality resulting from that it is forgotten to remove the fixing metal fitting 84 during an operation after the installation.

Description

  The present invention relates to a drum type washing machine for washing laundry contained in a rotating drum.

  Conventionally, this type of drum-type washing machine has a vibration-proof structure that prevents vibration associated with the rotation of the drum from being transmitted to the main body of the washing machine, and the vibration of the water tank that contains the drum during dehydration operation is detected by an acceleration sensor. It has been proposed to detect and detect abnormal vibrations (see, for example, Patent Document 1).

  FIG. 6 is a view showing an internal mechanism of a conventional washing machine described in Patent Document 1. As shown in FIG.

  In FIG. 6, in the washing machine main body 1, the water tub 2 is supported in a suspended state in a suspended state by a suspension 3 having an anti-vibration structure from above, and is supported by a damper 4 so as to be attenuated by vibration from below. A drum 5 formed in a cylindrical shape with a bottom is rotatably supported in the water tank 2, and rotation of a motor 7 fixed to the outer bottom portion of the water tank 2 causes a motor pulley 8, a belt 9, a drive pulley 6, and the like. Then, the drum 5 is transmitted to be driven to rotate such as washing, rinsing and dehydration. An acceleration sensor 10 is fixed to the aquarium 2, and when the aquarium 2 vibrates and acceleration is applied to the acceleration sensor 10, an internal vibrator is shaken to convert the displacement into an electrical signal and transmit it to a control device (not shown). And used for vibration control. In addition, a reed switch 14 is attached to the water tank 2, and an ON-OFF signal is transmitted to a control unit (not shown) by a magnet 15 attached to the drive pulley 6, and used for rotation control and the like.

  When the laundry put in the drum 5 is deviated during the dehydration process, the water tank 2 is supported in a swingable manner so as to absorb the misalignment and perform dehydration rotation, and transmitted to the washing machine body 1 However, when an abnormally large deviation occurs, the water tank 2 may cause abnormal vibration. If the aquarium 2 vibrates abnormally, there is a possibility that a large noise may be generated from the washing machine or the washing machine may be damaged. In order to solve the problem, according to the determination result of the vibration of the aquarium 2 detected by the acceleration sensor 10 Thus, the rotation speed is controlled to decrease the number of rotations, stop the dehydration operation, perform water supply again, and perform operations such as eliminating the shift of the laundry.

  On the other hand, in the above configuration, since the water tank 2 is configured to be swingable inside the washing machine body 1, if the water tank 2 swings abnormally greatly during transportation of the washing machine, it is attached to the water tank 2 itself or the water tank 2. There is a possibility that the member that is applied will collide with the inner wall surface of the washing machine main body 1 and other members attached inside the washing machine main body 1 to cause damage. Therefore, in order to solve such problems at the time of transport and transfer, a transfer fitting 16 is attached between the washing machine main body 1 and the water tub 2 with a fixing bolt 17, and is fixed and held so that the water tub 2 does not swing. Is installed in the user's home, the structure is such that the fixing bolt 17 and the transfer fitting 16 are removed to release the fixed holding of the water tank 2.

JP-A-3-264088

  However, in the conventional configuration, when installing a new washing machine, or before moving, attach a transfer bracket (fixed bracket) in advance, and forget to remove the fixed bracket at the place of moving. When operating, the vibration-proofing effect of the suspension and damper attached for the purpose of reducing vibration when the drum rotates does not function, causing problems such as abnormal noise and vibration in the washing machine body, and damage to members was there.

  The abnormal noise and vibration are mainly generated during the dehydration operation, but in automatic operation, the user is usually away from the device at the time of the dehydration process, and the abnormal notification is promptly notified to the user. There was also a problem that could not be done.

  The present invention solves the above-mentioned conventional problems. When a washing machine is newly purchased, the installer can detect forgetting to remove the fixing bracket by performing an installation diagnosis operation at the time of installation. In the case where the user forgets to remove the metal fitting, the display means and the notification means notify the installer of the abnormality, and an object is to prevent a dehydration vibration abnormality caused by forgetting to remove the fixing metal fitting.

  In order to solve the above problems, a washing machine of the present invention includes a washing machine main body, a drum formed in a bottomed cylindrical shape, a water tank that rotatably includes the drum, a motor that rotationally drives the drum, A vibration water tank unit composed of the drum, water tank, motor, etc., a fixing bracket for fastening the back surface of the washing machine body and the back surface of the water tank with fixing bolts, and vibration components in a plurality of directions of the water tank unit An acceleration sensor that can detect an operation, an operation display unit that is provided in the washing machine body and has an input setting unit and a display unit, and a control unit that controls a series of processes such as washing, rinsing, and dehydration by controlling the motor and the like The controller is configured to rotate the drum in the vicinity of a primary resonance frequency of the aquarium unit of the vibration system in the diagnosis of forgetting to remove the fixing bracket that is performed during a product installation diagnosis operation. Detecting vibration components of the water tub unit by chromatography, in which case oscillation component is small compared to a reference value set in advance, it is obtained by the determining configuration and remove forgotten the fixing bracket.

  This makes it possible to accurately detect forgetting to remove the fixing bracket during transfer during installation diagnosis operation, and to prevent dehydration vibration abnormalities caused by forgetting to remove the fixing bracket during operation after installation. it can.

  The washing machine of the present invention can prevent dehydration vibration abnormality in operation after installation by accurately detecting forgetting to remove the fixing bracket during transfer in installation diagnosis operation.

Sectional drawing which shows the structure of the drum type washing machine in Embodiment 1 of this invention Block diagram of the drum type washing machine The figure which shows the operation display part of the drum type washing machine Flow chart of installation diagnosis operation of the drum type washing machine Flow chart of installation diagnosis operation in Embodiment 2 of the present invention The figure which shows schematic structure of the conventional drum type washing machine

  A first invention includes a washing machine main body, a drum formed in a bottomed cylindrical shape, a water tank that rotatably includes the drum, a motor that rotationally drives the drum, the drum, the water tank, a motor, and the like. An aquarium unit of a vibration system comprising: a fixing bracket that fastens the back side of the washing machine body and the back side of the aquarium with a fixing bolt; an acceleration sensor that can detect vibration components in a plurality of directions of the aquarium unit; An operation display unit disposed in the washing machine main body and having an input setting unit and a display unit, and a control unit that controls the motor and the like, and controls a series of processes such as washing, rinsing, and dehydration. In the diagnosis of forgetting to remove the fixing bracket performed during the product installation diagnosis operation, the drum is rotated in the vicinity of the primary resonance frequency of the aquarium unit of the vibration system, and the acceleration sensor When the dynamic component is detected and the vibration component is small compared to the preset reference value, it is determined that the fixing bracket has been forgotten to be removed, thereby accurately detecting forgetting to remove the fixing bracket during transfer during installation diagnosis operation. Thus, it is possible to prevent the dehydration vibration abnormality caused by forgetting to remove the fixing bracket in the operation after installation.

  In the second invention, in particular, when the controller of the first invention determines in the diagnosis of forgetting to remove the fixing bracket in the diagnosis for installation operation, if it is determined that forgetting to remove the fixing bracket, the control unit does not proceed to the diagnosis for the next function and performs the setting diagnosis operation. By stopping and displaying the abnormality on the display means, the installer can be immediately informed of the installation failure and the failure can be corrected quickly.

  In the third aspect of the invention, in particular, when the control unit of the first aspect of the invention diagnoses that the fixing bracket is forgotten to be removed in the diagnosis of installation diagnosis operation, the determination result is stored in the storage means and the next function is stored. The diagnosis results of the next function and later are also stored in the storage means, and after the diagnosis of all functions is completed, the diagnosis results are displayed on the display means, thereby correcting the installation defects based on all the diagnosis results. It can be performed efficiently and collectively.

  Hereinafter, embodiments of the invention will be described with reference to the drawings. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a cross-sectional view showing the structure of a drum-type washing machine according to the first embodiment of the present invention.

  In FIG. 1, a water tank unit 76 rotatably houses a drum 78 in a water tank 82, and supports a rotating shaft 79 of the drum 78 with a bearing 80 provided on the back surface of the water tank 82, and a drum on the rotating shaft 79. A drive motor 81 is connected.

  The water tank unit 76 is disposed with its axis center inclined in the washing machine main body 83, and is attached between the base 73 of the washing machine main body 83 and the support plate 74 provided on the lower surface of the water tank 82, and is a fixture. The weight is supported by a damping anti-vibration damper 70 fixed by 77 or the like, and a first anti-vibration spring 71 is interposed between the upper support fitting 75 fixed to the upper part of the water tank 82 and the upper surface of the washing machine body 83. The second anti-vibration spring 72 between the washing machine main body 83 and the back surface portion 86 is elastically anti-vibration supported so as to be swingable.

  A door 87 is pivotally supported on the inclined surface of the front surface of the washing machine main body 83 so that the door 87 can be opened and closed, and the user puts laundry clothes into the drum 78 from the door 87 portion.

  The control unit 31 that is disposed on the inner lower surface of the washing machine main body 83 and that includes a microcomputer that controls a series of processes such as washing, rinsing, and dehydration is an operation display unit 89 disposed above the door 87. A signal is transmitted to the input setting means 35 and the display means 36 and an acceleration sensor 88 provided on the upper outer wall of the water tank 82 to detect vibration of the water tank unit 76, and the rotation control of the motor 81 is performed.

  The acceleration sensor 88 is composed of, for example, a semiconductor acceleration sensor, and is not composed of acceleration in one direction, but is composed of an acceleration sensor in multiple axes (two or three axes) such as front, rear, left, right and up. This is because the vibration of the actual aquarium unit 76 is not necessarily limited to one direction, so that the movement of the aquarium unit 76 is detected with high accuracy using a multi-axis acceleration sensor.

  Further, between the upper support metal fitting 75 fixed to the upper back side of the water tank 82 and the back surface part 86 of the washing machine main body 83, a fixing metal fitting 84 for preventing the water tank unit 76 from swinging when the washing machine is transported. Is attached with a fixing bolt 85. This is necessary only during transportation, and is removed together with the fixing bolt 85 when the washing machine is installed and installed.

  FIG. 2 is a block circuit diagram of the drum type washing machine in the first embodiment of the present invention.

  In FIG. 2, the AC power of the commercial power supply 20 is rectified by a rectifier 21, and the motor 81 is rotationally driven by the inverter circuit 24 using the DC power smoothed by the smoothing circuit including the choke coil 22 and the smoothing capacitor 23 as the driving power. .

  Further, the control unit 31 controls the rotation of the motor 81 based on the driving instruction input from the input setting unit 35 and the monitoring information of the driving state detected by each detecting unit (not shown). The drive unit 26 controls the operation of the water supply valve 27, the drain valve 28, the blower fan 12, and the heater 29, and a display signal is transmitted by the display unit 36 so that the user can know the operation state and the control state.

  The motor 81 includes a stator having three-phase windings 7a, 7b, and 7c and a rotor (not shown) having a two-pole permanent magnet, and includes three position detection elements 30a, 30b, and 30c. The rotation control is performed by a PWM control inverter circuit 24 configured as a DC brushless motor provided and configured by switching elements 24a to 24f. The rotor position detection signals detected by the position detection elements 30a, 30b, and 30c are input to the control unit 31 configured by a microcomputer or the like. Based on this rotor position detection signal, the drive circuit 32 performs PWM control of the on / off states of the switching elements 24a to 24f, thereby controlling the energization of the three-phase windings 7a, 7b, and 7c of the stator to control the motor 81. Rotate at the required speed.

  The control unit 31 includes a rotation speed detection unit 33 to which detection outputs of the three position detection elements 30a, 30b, and 30c are input. The rotation speed detection unit 33 includes the three position detection elements 30a, 30b, and 30c. The period is detected according to the change in the state of any signal, and the rotation speed of the motor 81 is calculated from the period. Since the load applied to the drum 78, that is, the motor 81 fluctuates according to the amount of clothes put into the drum 78, if the detection output of the rotation speed detection unit 33 is supplied to the cloth amount detection unit 34, the detected rotation is detected. Based on the number, the amount of cloth put into the drum 78 is detected. Since the detection output of the rotation speed detection unit 33 of the motor 81 corresponds to the rotation number of the drum 78, the rotation number of the drum 78 is obtained from the detection output of the rotation speed detection unit 33 in the following description.

  The acceleration sensor 88 provided in the aquarium 82 detects at least accelerations in the vertical and horizontal directions of the aquarium unit 76, and the acceleration detection unit 39 configured in the control unit 31 is a digital signal or an analog signal from the acceleration sensor 88. Is stored in the storage means 90, the vibration state is determined from the data, the dehydration control of the process and the later-described The presence / absence of the fixture 84 to be detected is detected.

  Further, the notification means 91 notifies the user of the end notification at the end of the process and the abnormality notification when an abnormality occurs.

  FIG. 3 is an operation display unit of the drum type washing machine according to the first embodiment of the present invention.

  In FIG. 3, the operation display section 89 has a power on switch 35a that is operated when the washing machine is turned on, a power off switch 35b that is operated when the power is turned off, and starts or pauses operations such as washing. Start switch 35c that is operated when performing washing, washing / drying switch 35k that selects whether to drive only washing, only drying, or both washing and drying, course selection to select each driving course Input setting means having a switch 35j, further detailed time for each process of washing, rinsing, dehydration and drying and individual time setting switches 35f, 35g, 35h for selecting whether or not to operate, and other setting switches 35d, 35e, etc. 35, and display means 36 for displaying the contents set by the operation of these input setting means 35.

  Then, when the user turns on the power switch 35a and looks at the menu displayed on the display means 36 and presses each switch of the input setting means 35 to select a desired driving course, the display means 36 The set operation details light up and characters and figures appear. The display in FIG. 3 is an example when the “Random” course is set.

  If the switches of the input setting means 35 are specially operated, for example, if the power-on switch 35a is turned on while the individual time setting switch 35h and the course selection switch 35j are pressed at the same time, it will be described later. The mode of installation diagnosis operation to be performed can be selected. The display means 36 also displays the diagnosis result of the installation diagnosis operation.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  FIG. 4 is a flowchart of the installation diagnosis operation of the drum type washing machine in the first embodiment of the present invention.

  In FIG. 4, when the installation diagnosis operation mode is selected by the input setting means 35, first of all, in the dehydration confirmation diagnosis (step S10), detection of whether or not the fixing bracket 84 has been correctly removed is detected. (Step S11).

  In detection of forgetting to remove the fixing bracket, acceleration detection of the aquarium unit 76 by the acceleration sensor 88 is started (step S12), rotation number detection of the drum 78 is started (step S13), the motor 81 is driven, and the rotation of the drum 78 is started. The speed is increased (step S14). And the drum 78 is rotated to 170-210 r / m used as the primary resonant frequency of the water tank unit 76, and is maintained for a predetermined time (step S15).

  This is because when the drum 78 is rotated in the vicinity of the primary resonance frequency, the aquarium unit 76 has a large amplitude in at least the left-right direction in the state without the fixing bracket 84, and when the fixing bracket 84 is attached, the aquarium unit 76. Is forcibly fixed to the washing machine main body, the amount of amplitude of the water tank unit 76 in the left-right direction is reduced. Normally, at the time of dehydration, the rotation speed of the drum 78 is removed from the primary resonance frequency range, or the rotation speed of the drum 78 is increased quickly so as to pass through the primary resonance frequency range quickly. This is because forgetting to remove the fixing bracket 84 can be detected with high accuracy.

  Next, from the acceleration data of the acceleration sensor 88 and the rotation speed of the drum 78, the microcomputer calculates at least the left and right amplitude values of the water tank unit 76 per one rotation of the drum 78 (step 16). Then, the amplitude value of the water tank unit 76 in the left-right direction (Y-axis) is compared with the reference value (step S17), and if smaller than the reference value (YES in step S17), it is determined that the fixing bracket 84 has been forgotten to be removed, Subsequent operation is stopped (step S24), an abnormality is displayed on the display means 36 of the operation display unit 89, and the notification means 91 is notified (step S25). If the amplitude value is larger than the reference value in step S17 (NO in step S17), it is determined that the fixing bracket 84 has been removed, and the process proceeds to the next diagnosis.

  Next, the vibration state of the dehydration confirmation diagnosis is detected (step S18). This is a diagnosis for detecting whether there is a problem in the vibration state due to the inclination or rattling of the installation surface. If the vibration state is bad (NO in step S19), the subsequent operation is stopped (step S24), and An abnormality is displayed on the display means 36 of the operation display section 89 and notified by the notification means 91 (step S25). If the vibration state is good (YES in step S19), the process proceeds to the next diagnosis.

  Next, the water supply state is diagnosed (step S20). This is a diagnosis for confirming water leakage at the water supply related hose connection, water supply from the water supply valve 27, water stoppage of the drain valve 28, etc. If there is an abnormality (NO in step S21), The operation is stopped (step S24), the abnormality is displayed on the display unit 36 of the operation display unit 89, and the notification unit 91 notifies the abnormality (step S25). If the water supply state is normal (YES in step S21), the process proceeds to the next diagnosis.

  Finally, the drainage state is diagnosed (step S22). This is a diagnosis for confirming the operation of the drain valve 28, water leakage at the drainage-related hose connection part, and if there is an abnormality (NO in step S23), the subsequent operation is stopped (step S24) and the operation is performed. The abnormality is displayed on the display means 36 of the display unit 89 and notified by the notification means 91 (step S25). If the drainage state is normal (YES in step S23), the installation diagnosis is terminated (step S26).

  As described above, according to the first embodiment, in the diagnosis of forgetting to remove the fixing bracket at the beginning of the installation diagnosis operation for performing the pass / fail diagnosis of a plurality of functions related to product installation, the drum is set to 1 of the vibration water tank unit. Rotating near the next resonance frequency, the vibration sensor of the water tank unit is detected by the acceleration sensor by the acceleration sensor, and if the vibration component is smaller than a preset reference value, it is determined that the fixing bracket is forgotten to be removed. Therefore, it is possible to accurately detect forgetting to remove the fixing bracket during transportation in installation diagnosis operation, and to prevent dehydration vibration abnormality caused by forgetting to remove the fixing bracket in operation after installation. it can.

  Also, if it is determined in the diagnosis forgetting to remove the fixing bracket in the installation diagnosis operation that it is determined that the fixing bracket has been forgotten, the installation diagnosis operation is stopped without proceeding to the diagnosis of the next function, the abnormality is displayed on the display means, and the notification means is displayed. By informing, the installer can be immediately informed of the installation failure and the failure can be corrected quickly.

(Embodiment 2)
FIG. 5 is a flowchart of the installation diagnosis operation of the drum type washing machine in the second embodiment of the present invention.

  In FIG. 5, steps S10 to S16 are the same as those in the first embodiment shown in FIG.

  In step S31, the calculation result of step S16 is stored in the storage means 90, and the process proceeds to detection of the next vibration state (step S32). This detection has the same detection contents as step S18 in FIG. 4, and the detection result is stored in the storage means 90 (step S33), and the process proceeds to the next water supply state diagnosis (step S34). This diagnosis has the same diagnosis contents as step S20 in FIG. 4, the diagnosis result is stored in the storage means 90 (step S35), and the process proceeds to the next drainage state diagnosis (step S36). This diagnosis has the same diagnosis contents as step S22 in FIG. 4, and after the diagnosis result is stored in the storage means 90 (step S37), in step S38, detection of forgetting to remove the fixing bracket, vibration state detection, water supply confirmation is performed. The diagnosis result of the drainage confirmation is displayed on the display means 36 of the operation display unit 89, and the installer is notified of the presence or absence of abnormality by each diagnosis.

  As described above, in the second embodiment, in the diagnosis of forgetting to remove the fixing bracket in the diagnosis operation for installation, when it is determined that the fixing bracket is forgotten, the determination result is stored in the storage means and the process proceeds to the diagnosis for the next function. The diagnosis results for the next function and later are also stored in the storage means, and after the diagnosis of all functions is completed, the diagnosis results are displayed on the display means, thereby efficiently correcting the defect points based on all the diagnosis results. be able to.

  As described above, the drum-type washing machine according to the present invention can accurately detect forgetting to remove the fixing bracket during product transportation and prevent problems due to washing due to forgetting to remove and abnormal vibration during dehydration. Since it becomes possible, it can be applied to other uses such as household and commercial washing machines.

Reference Signs List 31 Control unit 35 Input setting unit 36 Display unit 39 Acceleration detection unit 75 Upper support bracket 76 Water tank unit 78 Drum 81 Motor 82 Water tank 83 Washing machine body 84 Fixing bracket 85 Fixing bolt 86 Back surface 88 Acceleration sensor 89 Operation display unit 90 Storage unit 91 Notification means

Claims (3)

Washing machine body, bottomed cylindrical drum, water tank containing the drum rotatably, motor for rotating the drum, vibration water tank unit comprising the drum, water tank, motor, etc. A fixing bracket that fastens the back surface portion of the washing machine body and the back surface side of the water tank with a fixing bolt, an acceleration sensor that can detect vibration components in a plurality of directions of the water tank unit, and the washing machine body. An operation display unit having an input setting unit and a display unit, and a control unit for controlling a series of processes such as washing, rinsing, and dehydration by controlling the motor and the like. In the diagnosis of forgetting to remove the fixture, sometimes the drum is rotated in the vicinity of the primary resonance frequency of the aquarium unit of the vibration system and the vibration component of the aquarium unit is detected by the acceleration sensor. If the vibration component is small compared to the preset reference value, and forget it determines drum washing machine disconnect the fixing bracket. The control unit stops the installation diagnosis operation without displaying the next function diagnosis and displays an abnormality on the display means when it is determined in the diagnosis forgetting to remove the fixing bracket in the diagnosis of installation diagnosis operation that it is determined that the fixing bracket is forgotten. 2. A drum-type washing machine according to 1. When it is determined in the diagnosis forgetting to remove the fixing bracket in the installation diagnosis operation that the control unit determines that the fixing bracket is forgotten to be removed, the control unit stores the determination result in the storage means and proceeds to the diagnosis for the next function. The drum type washing machine according to claim 1, wherein the drum type washing machine is stored in the storage means and displays the diagnosis result on the display means after completion of diagnosis of all functions.

Images