JP2016158733A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine with a downsized control device at reduced cost.SOLUTION: A lock device 121 for locking a door body 120 includes a lever for locking the door body 120, a solenoid for operating the lever, and an opening/closing detection circuit 257 for opening/closing by the linkage with the opening/closing of the door body 120. A control device 80 having a drive circuit 256 for driving the solenoid for locking the door body 120, a lock detection circuit 255 for detecting a locked state of the door body 120, and the opening/closing detection circuit 257 for detecting an opening/closing state of the door body 120 keeps a motor 231 from being driven when the door body 120 is in an unlocked state, based on an output from the lock detection circuit 255.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a washing machine including a door locking device.

  Conventionally, in this type of washing machine, for safety, a configuration including a lock device that locks the door so that the door does not open during operation has been proposed (for example, see Patent Document 1).

  The washing machine has, for example, a control device 29 shown in the block circuit diagram of FIG.

  In FIG. 6, when the user stores the laundry in the washing and dewatering tub, closes the door, and operates the power switch of the operation display unit, the power relay 38 is turned on and each load can be driven.

  Next, when the start switch included in the input means 30 is operated, the solenoid 24 of the locking device is driven to lock the door body. In this state, the washing process is performed.

  When the washing process ends, the solenoid 24 is turned off and the door body is unlocked, and then the power supply relay 38 is turned off and the series of operations is finished.

JP 2013-103044 A

  However, the conventional configuration is based on the premise that the lock device is used with an AC voltage, and there is a problem that it is difficult to directly turn on and off the motor voltage of an inverter washing machine using a DC high voltage.

  Further, even in the case of an inverter washing machine, the control device is provided with a rectifier circuit for operating the lock device and a rectifier circuit for the inverter motor separately, and there is a problem that the cost is increased and the control device is enlarged. there were.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a washing machine capable of reducing the size of the control device and reducing the cost.

  In order to solve the above-described conventional problems, a washing machine of the present invention includes a casing, a water tank elastically supported in the casing, and a bottomed cylindrical washing and dehydrating tank that is rotatably included in the water tank. A motor that rotationally drives the washing / dehydrating tub, a door body that freely opens and closes a laundry inlet to the washing / dehydrating tub, a lock device that locks the door body, the motor, and the lock A control device having control means for controlling the device, wherein the lock device includes a lever that locks the door body, a lock detection switch that detects the lock of the door body, and a solenoid that operates the lever by electromagnetic force. And an open / close detection switch that opens and closes in conjunction with the open / closed state of the door body, and the control device includes a drive circuit that drives the solenoid, a lock detection circuit that detects lock of the door body, door And a close detection circuit for detecting the open or closed state is intended to prohibit the driving of the motor in the unlocked state of the door body on the basis of an output from said lock detection circuit.

  As a result, it is possible to reduce the size and cost of the control device.

  The washing machine of the present invention can reduce the size of the control device and reduce the cost.

The longitudinal cross-sectional view of the washing machine in embodiment of this invention Block diagram of the washing machine Block diagram of lock detection circuit of the washing machine Block circuit diagram of the opening / closing detection circuit of the washing machine The figure which shows the sequence of the door body opening and closing of the washing machine Block diagram of a conventional washing machine

  The first invention includes a housing, a water tank elastically supported in the housing, a bottomed cylindrical washing and dewatering tank rotatably contained in the water tank, and a motor that rotationally drives the washing and dewatering tank And a door that closes the opening of laundry into the washing and dewatering tub so as to be freely opened and closed, a lock device that locks the door, and a control device that has a control means for controlling the motor and the lock device; The locking device includes a lever that locks the door body, a lock detection switch that detects the locking of the door body, a solenoid that operates the lever by electromagnetic force, and an open / closed state of the door body. An open / close detection switch that opens and closes, and the control device includes a drive circuit that drives the solenoid, a lock detection circuit that detects the lock of the door body, and an open / close detection circuit that detects an open / closed state of the door body. The a, by prohibiting driving of the motor in the unlocked state of the door body on the basis of an output from said lock detection circuit, it is possible to reduce the size of the control device, a reduction in cost.

  According to a second invention, in particular, in the first invention, a rectifier circuit for converting an AC voltage into a DC voltage is provided, and a DC voltage from the rectifier circuit is supplied to the motor and the lock device. Miniaturization and cost reduction can be achieved.

  According to a third aspect of the invention, in particular, in the first or second aspect of the invention, the control device uses a pulse signal as an output signal from the lock detection circuit, so that a circuit component breaks down or foreign matter is attached. Even in this case, since it is possible to suppress erroneous detection of the locked state of the door body, safety can be improved.

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

  It should be noted that the terms such as “up”, “down”, “left”, and “right” used in the following description are merely for the purpose of clarifying the explanation, and the principle of the washing machine is used. It is not limited at all.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a washing machine according to an embodiment of the present invention, FIG. 2 is a block circuit diagram of the washing machine, FIG. 3 is a block circuit diagram of a lock detection circuit of the washing machine, and FIG. It is a block circuit diagram of the open / close detection circuit of the washing machine.

In FIG. 1, the washing machine 100 includes a casing 110 and a storage tank 200 that is disposed in the casing 110 and stores clothing. The storage tank 200 has a substantially cylindrical shape surrounding the rotation axis RX. The washing / dehydrating tub 210 having a peripheral wall 211 and a water tub 220 that rotatably houses the washing / dehydrating tub 210 are mainly configured.

  The case 110 includes a front wall 111 in which an insertion port for putting clothes into the washing / dehydrating tub 210 is formed, and a rear wall 112 opposite to the front wall 111. The washing / dehydrating tub 210 and the water tub 220 are open toward the front wall 111.

  The washing machine 100 includes a door body 120 attached to the front wall 111 so as to be freely opened and closed. The door body 120 rotates between a closed position for closing the charging port formed in the front wall 111 and an open position for opening the charging port. The user can turn the door 120 to the open position and put the clothes into the washing and dewatering tub 210 through the insertion port of the front wall 111. After charging, the door 120 can be moved to the closed position and washed. Note that the door 120 shown in FIG. 1 is in a closed position.

  The washing and dewatering tub 210 rotates around a rotation axis RX extending between the front wall 111 and the rear wall 112. The clothes put in the storage tub 200 move in the washing / dehydrating tub 210 as the washing / dehydrating tub 210 rotates, and are subjected to various processes such as washing, rinsing and / or dehydrating.

  The washing and dewatering tub 210 has a bottom wall 212 facing the door body 120 in the closed position. The water tank 220 surrounds the bottom 221 that surrounds a part of the bottom wall 212 and the peripheral wall 211 of the washing / dehydrating tank 210, and the other part of the peripheral wall 211 of the washing / dehydrating tank 210 between the bottom 221 and the door body 120. And a front portion 222.

  The storage tank 200 has a rotating shaft 230 attached to the bottom wall 212 of the washing and dewatering tank 210. The rotation shaft 230 extends toward the rear wall 112 along the rotation axis RX. The rotating shaft 230 passes through the bottom 221 of the water tank 220 and appears between the water tank 220 and the rear wall 112.

  The washing machine 100 includes a motor 231 installed below the water tank 220, a pulley 232 attached to the rotating shaft 230 exposed outside the water tank 220, and a belt 233 that transmits the power of the motor 231 to the pulley 232. ing. When the motor 231 operates, the power of the motor 231 is transmitted to the belt 233, the pulley 232, and the rotating shaft 230. As a result, the washing / dehydrating tank 210 rotates in the water tank 220.

  The washing machine 100 includes a packing structure 130 disposed between the front portion 222 of the water tank 220 and the door body 120. The door 120 rotated to the closed position compresses the packing structure 130. As a result, the packing structure 130 forms a watertight seal structure between the door body 120 and the front portion 222.

  The housing 110 includes a housing top wall 113 that extends substantially horizontally between the front wall 111 and the rear wall 112, and a housing bottom wall 114 on the opposite side of the housing top wall 113. The washing machine 100 includes a water supply port 140 connected to a faucet (not shown), and a distribution unit 141 for distributing water introduced through the water supply port 140. The water supply port 140 appears on the rear wall 112, the distribution unit 141 is disposed between the housing top wall 113 and the storage tank 200, and the water supply valve 310 is used as a part of the distribution unit 141. .

  The washing machine 100 includes a detergent storage part (not shown) in which the detergent is stored. The distribution unit 141 includes a plurality of water supply valves for selectively supplying water to the storage tank 200 and the detergent storage unit. In addition, in FIG. 2, the water supply path | route to a detergent accommodating part is not shown. For water supply to the storage tank 200 and the detergent storage unit, a technique used in a known washing machine can be suitably applied.

  The washing machine 100 includes an operation display unit 85. The operation display unit 85 is provided on the front wall 111, for example. The operation display unit 85 includes a power-on switch (not shown) made up of an automatic return type push switch, a power-off switch (not shown) made up of an automatic return type push switch as a power-off command generating means, Input setting means 84 (see FIG. 2) for selecting and setting modes such as courses and various functions and display means 84 (see FIG. 2) for displaying setting contents and the like are provided.

  The washing machine 100 includes a control device 80 having a built-in control means 87. The control device 80 is provided, for example, under the casing top wall 113.

  The washing machine 100 includes a lock device 121 that locks the door body 120 in the closed position in the vicinity of the door body 120, and the lock device 121 locks / unlocks the door body 120 based on an operation signal from the control device 80. Lock it.

  In addition, a recess is formed in the bottom of the water tank 220, and the recess is provided with a heater 56 such as a sheathed heater for heating the washing water in the horizontal direction, and a thermistor for detecting the water temperature is provided in the vicinity of the heater 56. A temperature detecting means 63 is provided.

  A drainage pump 74 for draining the washing water in the tank to the outside of the machine is provided at the lower part of the storage tank 200. The circulation pump 75 circulates the water in the storage tank 200 as necessary, and by circulating the water in the storage tank 200, it is possible to prevent early dissolution and bias of the detergent, and to improve the function of easy washing. I am trying.

  In FIG. 2, the control means 87 is constituted by a microcomputer or the like, and inputs outputs from a water level detection means 90 for detecting the water level in the water tank 220, a temperature detection means 63, etc. The setting contents are displayed on the display means 84 based on the contents set by the user's input.

  The control means 87 includes a heater 56 for heating water in the water tank 220, a water supply valve 310 for supplying water into the water tank 220, and a water tank via a load driving means 86 constituted by a bidirectional thyristor, a relay, and the like. 220 controls the operation of the drain pump 74 for draining the water in 220, the circulation pump 75 for circulating the water in the water tank 220, etc., and controls the operation of the motor 231 using the inverter motor drive circuit 251, washing, Controls rinsing and dehydrating operations.

  The power supply circuit 47 is a DC power supply obtained by switching or the like from the commercial power supply 88 and supplies electric energy to the control means 87 and each load. Power supply from the commercial power supply 88 to the power supply circuit 47 is converted into a DC voltage by using a rectifier circuit 252 including a diode bridge and a smoothing capacitor provided in the preceding stage.

  That is, the control device 80 performs the operations of the lock device 121 and the inverter-controlled motor 231 with a DC power source converted by one rectifier circuit 252.

  The locking device 121 includes a lever (not shown) that locks the door body 120 in a closed state, a lock detection switch 253 that opens and closes when the door body 120 is locked, and a lever (not shown) by electromagnetic force. ) And an open / close detection switch 258 that opens / closes in series with the open / close operation of the door body 120 to the housing 110 in series with the solenoid 254.

One end of the solenoid 254 is connected to the commercial power supply 88, and the other end is connected to a drive circuit 256 that drives the solenoid 254 in accordance with an operation command from the control means 87. The drive circuit 256 is composed of an AC electronic switch such as a triac, for example. An open / close detection circuit 257 is connected in parallel with the drive circuit 256, and the open / close detection circuit 257 detects the open / close state of the open / close detection switch 258 and transmits the open / close state of the door body 120 to the control means 87.

  One end of the lock detection switch 253 is connected to the commercial power supply 88, the other end is connected to the lock detection circuit 255, and the lock detection circuit 255 detects the open / closed state of the lock detection switch 253. Communicate lock status.

  FIG. 3 shows a specific circuit configuration of the lock detection circuit 255.

  In FIG. 3, the lock detection circuit 255 includes resistors R1, R2, R3, and R4, a diode D1, a phototransistor coupler PC1, and a transistor Q1, and controls a pulse signal corresponding to the commercial power supply 88 to control means 87. To communicate.

  FIG. 4 shows a specific circuit configuration of the open / close detection circuit 257.

  In FIG. 4, the open / close detection circuit 257 includes resistors R101, R102, R103, and R104, a diode D101, a phototransistor coupler PC101, and a transistor Q101. When the door 120 is closed, the open / close detection switch Since 258 is closed, a pulse signal corresponding to the commercial power supply 88 is transmitted to the control means 87.

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

  FIG. 5 is a diagram showing a door body opening / closing sequence of the washing machine in the embodiment of the present invention.

  As shown in FIG. 5, first, the commercial power supply 88 is energized in the washing machine and the door 120 is closed, but the lock device 121 does not lock the door 120 (for example, the initial standby state). Etc.) will be described.

  In this state, the lock detection switch 253 is in an open state, the voltage of the commercial power supply 88 is not applied to the lock detection circuit 255, and the circuit does not operate. Therefore, a constant signal of “L” is input to the control means 87. Is done. On the other hand, since the open / close detection switch 258 is in the closed state because the door 120 is closed, the commercial power supply 88 is supplied to the open / close detection circuit 257 (section (a) in FIG. 5).

  Since the commercial power supply 88 is an AC voltage, a current flows to the LED via R101 in a positive bias direction cycle with respect to the LED of the PC 101 in the open / close detection circuit 257, and during this time, the phototransistor of the PC 101 operates. Thus, since the base current also flows through R102 to Q101 connected to the phototransistor, Q101 operates and the control means 87 receives the “H” signal.

  In the reverse cycle, since current flows through D101, it does not flow through the LED of PC101, Q101 does not operate, and an “L” signal is input to control means 87.

  Therefore, while the door 120 is closed, a square wave synchronized with the AC voltage is input to the control means 87.

Next, in order for the user to put the clothes to be washed into the washing and dewatering tank 210, the door 120
When the switch is opened, the open / close detection switch 258 is opened, so that the commercial power supply 88 is not supplied to the open / close detection circuit 257 and the open / close detection circuit 257 does not operate. (Section (b) in FIG. 5). If the door 120 is closed after putting in clothes, it will be in the same state as the area of Fig.5 (a).

  Next, when the user operates the input setting means 83 to start the operation of the washing machine, the control means 87 sends an operation signal to the drive circuit 256 to operate the solenoid 254. The door body 120 is locked by the operation of the solenoid 254, and an unsafe state where the user accidentally opens the door body 120 during operation can be prevented.

  Since the lock detection switch 253 is also closed in conjunction with the locking operation of the door 120, the commercial power supply 88 is supplied to the lock detection circuit 255.

  In addition, since the drive circuit 256 is in the operating state (short circuit state), the supply voltage to the open / close detection circuit 257 connected in parallel is lost, and the circuit does not operate. Therefore, the control means 87 regardless of the state of the door body 120. Is inputted with a constant signal of “L” (section (c) in FIG. 5). After the operation of the drive circuit 256 is completed, a square wave synchronized with the AC voltage is input to the control means 87.

  And the control means 87 can perform process driving | operation by detecting that the door body 120 is a locked state, and controlling the motor 231. FIG.

  As described above, in the present embodiment, the control device 80 arranges the drive circuit 256 and the open / close detection circuit 257 in parallel, and is converted by one rectifier circuit 252 including a diode bridge and a smoothing capacitor. By driving the inverter-controlled motor 231 and the lock device 121 with the direct current voltage, the control device 80 can be reduced in size and the manufacturing cost can be reduced.

  Further, the control device 80 has a configuration in which the output signal from the lock detection circuit 255 is a repetitive pulse signal of H and L, so that even if a circuit component breaks down or a foreign object adheres, the door 120 is locked. It is possible to suppress erroneous detection of the state, and it is possible to improve safety.

  As described above, since the washing machine according to the present invention can drive the motor and the lock device with the DC voltage converted by one rectifier circuit, the washing machine according to the present invention includes an inverter control motor and a door lock device. It can be applied to uses such as washing machines, clothes dryers, and dishwashers.

DESCRIPTION OF SYMBOLS 80 Control apparatus 87 Control means 110 Housing | casing 120 Door body 121 Lock apparatus 210 Washing / dehydration tank 220 Water tank 231 Motor 252 Rectifier circuit 253 Lock detection switch 254 Solenoid 255 Lock detection circuit 256 Drive circuit 257 Open / close detection circuit 258 Open / close detection switch

Claims (3)

A housing, a water tank elastically supported in the housing, a bottomed cylindrical washing and dewatering tank rotatably contained in the water tank, a motor for rotationally driving the washing and dewatering tank, and the washing and demounting A door that closes the opening of the laundry into the aquarium so as to be openable and closable, a lock device that locks the door, and a control device that has a control means for controlling the motor and the lock device;
The lock device opens and closes in conjunction with a lever that locks the door body, a lock detection switch that detects the lock of the door body, a solenoid that operates the lever by electromagnetic force, and an open / closed state of the door body. An open / close detection switch,
The control device includes a drive circuit that drives the solenoid, a lock detection circuit that detects the lock of the door body, and an open / close detection circuit that detects an open / closed state of the door body, from the lock detection circuit A washing machine that prohibits driving of the motor when the door is unlocked based on an output. The washing machine according to claim 1, further comprising a rectifier circuit that converts an AC voltage into a DC voltage, and supplying the DC voltage from the rectifier circuit to the motor and the lock device. The washing machine according to claim 1, wherein the control device uses an output signal from the lock detection circuit as a pulse signal.

Images