JP6238730B2 - Dishwasher - Google Patents

Description

  The present invention relates to a dishwasher.

  As a conventional dishwasher, there is known one in which a slide rail for guiding a washing tank is installed in a tiltable manner in a washing machine body. Conventionally, a dishwasher has been configured so that a slide rail can be tilted and a washing tank can be pulled out or pushed in with a small force (see, for example, Patent Document 1).

JP 2004-261259 A (summary, FIG. 1)

  However, in the conventional dishwasher, the force when moving the washing tank is reduced by tilting the slide rail and pulling out or pushing in the washing tank, but this is not always sufficient and the structure is complicated. Met.

  In order to improve the workability of the operation of pulling out or pushing in such a cleaning tank, it is conceivable to provide a slide device that pushes out or pulls out the cleaning tank from the main body of the cleaning machine, for example, by a driving force such as a motor. However, in such a configuration, for example, when the load on the motor is different between when the washing tank is pushed out and when the washing tank is pulled out, the rotation speed of the motor may change. As a result, the operation sound of the motor changes depending on whether the washing tub is pushed out or pulled out, so that the user who uses the dishwasher may feel uncomfortable.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to suitably push out the cleaning tank from the main body of the cleaning machine and reduce user discomfort caused by the operation sound of the motor. It is to obtain a dishwasher with a simple structure that can be done.

The dishwasher according to the present invention includes a washing machine body having an opening, a washing tank accommodated in the washing machine body, a slide shaft and a drive unit that drives the slide shaft to be pushed out or pulled back, A slide device that pushes out the slide shaft to push out the cleaning tank from the main body of the washing machine, a control unit that controls the slide shaft to be pulled back at a speed equal to or less than the speed at which the slide shaft is pushed out, and detects the number of rotations of the drive unit a detection unit for, have a, wherein, when pulled back the slide shaft, and performs the control of the drive unit to be less than the rotational speed when pushing the slide shaft.

  According to the present invention, it is possible to obtain a dishwasher having a simple structure capable of suitably pushing out the washing tank from the washing machine main body and reducing the user's discomfort caused by the operation sound of the motor.

It is sectional drawing of the tableware washing machine which concerns on Embodiment 1 of this invention. An example of the front view of the dishwasher shown in FIG. 1 is shown. It is a schematic block diagram of the dishwasher shown in FIG. 1 and FIG. It is an enlarged view of the slide apparatus shown in FIG. It is an enlarged view which shows an example of the operation state of the slide apparatus shown in FIG. It is an enlarged view which shows the other example of the operation state of the slide apparatus shown in FIG. It is an enlarged view which shows the other example of the operation state of the slide apparatus shown in FIG. It is a block diagram which shows an example of the slide apparatus control part shown in FIG. It is a block diagram which shows the other example of the slide apparatus control part shown in FIG. The other example of the front view of the dishwasher shown in FIG. 1 is shown. It is the longitudinal cross-sectional view which expanded the principal part of the handle | steering-wheel shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof is omitted or simplified as appropriate.

Embodiment 1 FIG.
As shown in FIGS. 1 and 2, the dishwasher 100 according to this embodiment has a substantially box shape, and is installed on a sink, for example, to clean the dishes 22 and the like. The dishwasher 100 includes a washing machine body 1 and a washing tank 2 accommodated in the washing machine body 1.

  As shown in FIG. 2, the operation panel 5 is provided on the door (front plate) 4 of the cleaning tank 2. The operation unit 6 provided on the operation panel 5 includes, for example, a start / pause switch 7, an open switch 8, a display unit 9, a power switch, and the like. The user operates the operation unit 6 to give an instruction to the dishwasher 100. The operation panel 5 is provided with an exhaust port 10 at a position spaced from the operation unit 6. The exhaust port 10 discharges hot air generated during the drying process.

  Control of the whole dishwasher 100 is performed by the control part 40 shown in FIG. The control unit 40 includes, for example, a microcomputer 41 as shown in FIG. The microcomputer 41 receives signals from the operation unit 6, the water amount detection unit 42, the washing water temperature detection unit 43, the door open detector 44, the reverse position detection unit 38, the forward position detection unit 39, and the like. Further, the microcomputer 41 controls the display unit 9, the heater 13, the cleaning pump 15, the drainage pump 16, the water supply valve 17, the blower 18, the slide device 30, the notification unit 46, and the like based on the above inputs and the like. Is output to perform these controls. Note that the control unit 40 may be configured by an electric circuit or the like that performs specific signal processing instead of the microcomputer 41.

  As shown in FIG. 1, an opening is formed in the front surface (left side in the drawing) of the cleaning machine main body 1, and a generally box-shaped cleaning tank 2 is accommodated therein. An opening is formed in the upper part of the washing tub 2, and a tableware basket 21 into which the tableware 22 and the like are placed is accommodated. Further, the cleaning tank 2 is provided with a heater 13 for heating the cleaning water, a cleaning nozzle 14 for jetting the cleaning water, and the like. In the lower part of the cleaning tank 2, the cleaning water is pumped to the cleaning nozzle 14 for cleaning. A pump 15, a drainage pump 16 for discharging the washed water after washing, and the like are provided. The tableware 22 and the like are cleaned while the opening of the cleaning tank 2 is sealed with the inner lid 23.

  Between the rear part (right side in the drawing) of the cleaning tank 2 and the cleaning machine body 1, there are a water supply valve 17 for supplying cleaning water to the cleaning tank 2, a blower 18 for sending outside air into the cleaning tank 2 during the drying process, and the like. Is provided. A second heater 20 that heats the outside air is provided in the air passage 19 that communicates the blower 18 and the cleaning tank 2.

  The rail 3 provided in the lower part of the cleaning tank 2 is combined with a guide rail (not shown) provided in the cleaning machine main body 1. The cleaning tank 2 is slid using these rails and pulled out from the opening of the cleaning machine body 1. The cleaning tank 2 is held (locked) by a latch 11 biased by a spring 12 when it is accommodated in the cleaning machine main body 1. The configuration for holding the cleaning tank 2 in the cleaning machine main body 1 may be configured by an electrical locking device using a solenoid or the like, or a locking device using a magnetic force such as a magnet.

  The slide device 30 is attached to the lower part of the cleaning tank 2. The slide device 30 can push out the cleaning tank 2 from the opening of the cleaning machine body 1 by applying a force between the cleaning machine body 1 and the cleaning tank 2. That is, the slide device 30 pushes the cleaning tank 2 from the opening of the cleaning machine body 1 by applying a force between the cleaning machine body 1 and the cleaning tank 2 so as to release the lock of the latch 11. The slide device 30 may be attached to the cleaning machine body 1.

  As shown in FIG. 4, the slide device 30 includes a main body 31, a slide shaft 33, a motor 36, a pinion 37, a backward position detector 38, and a forward position detector 39. The slide shaft 33 is supported by a holding portion 35 in a groove 32 provided in the main body 31 and is slidable in the axial direction (the front-rear direction in the drawing). The rack 34 provided on the slide shaft 33 and the pinion 37 provided on the shaft of the motor 36 are arranged so as to mesh with each other. By driving the motor 36, the slide shaft 33 slides in the axial direction. .

  Here, the length of the slide shaft 33 is set so as to push the cleaning tank 2 to a desired position. For example, the length of the slide shaft 33 is set so that the cleaning tank 2 is pushed out to a position before the fully opened position of the cleaning tank 2. In this case, in order to release the lock of the latch 11, the initial stage of pulling out the cleaning tank 2 that requires a large force is pushed out by the slide device 30. Does not require power. The length of the slide shaft 33 is set so that at least the latch 11 is unlocked.

  The retreat position detection unit 38 detects that the slide shaft 33 is accommodated in the main body 31 and has reached its retreat limit position, and the advance position detection unit 39 projects the slide shaft 33 from the main body 31 and the protrusion thereof. Detect that the limit position has been reached.

  Next, an example of operation | movement of the dishwasher 100 comprised as mentioned above is demonstrated. First, the power switch of the operation unit 6 shown in FIG. 2 is turned on. When the power switch is turned on, for example, the display unit 9 is lit. Next, the open switch 8 of the operation unit 6 is turned on. When the open switch 8 of the operation unit 6 is turned ON, for example, the display unit 9 blinks.

  When the open switch 8 is turned ON, a control signal is sent from the control unit 40 shown in FIG. 1 to the slide device 30 to drive the motor 36 shown in FIG. The motor 36 rotates the pinion 37 to advance the slide shaft 33 until the advance position detector 39 detects it. At this time, the tip of the slide shaft 33 is in contact with the rear wall of the cleaning machine body 1, and the slide shaft 33 moves the cleaning tank 2 to which the slide device 30 is attached from the opening of the cleaning machine body 1 to the front. Extrude into. Thereafter, the motor 36 rotates the pinion 37 in the reverse direction to retract the slide shaft 33 until the retracted position detection unit 38 detects it. At this time, the tip of the slide shaft 33 moves in a direction away from the rear wall of the cleaning machine body 1.

  After the cleaning tank 2 is pushed out from the opening of the cleaning machine main body 1, the user puts the tableware 22 to be cleaned into the tableware basket 21 shown in FIG. 1 and pushes the cleaning tank 2 into the cleaning machine main body 1. When the cleaning tank 2 is pushed into the main body 1 of the cleaning machine, the cleaning tank 2 is locked by a latch 11 biased by a spring 12. At this time, the tip of the slide shaft 33 abuts against the rear wall of the cleaning machine body 1. In this state, the start switch 7 of the operation unit 6 shown in FIG. 2 is turned on.

  When the start switch 7 is turned on, the water supply valve 17 shown in FIG. 1 is opened and cleaning water is supplied into the cleaning tank 2. When the water amount detecting means 42 shown in FIG. 3 detects that a set amount of cleaning water has been supplied, the water supply valve 17 is closed. At this time, a detergent is put into the washing water as necessary. Next, the heater 13 shown in FIG. 1 is energized to heat the cleaning water to a desired temperature. When the temperature detecting means 43 shown in FIG. 3 detects that the cleaning water has reached a desired temperature, the energization to the heater 13 is stopped. Then, the cleaning pump 15 shown in FIG. 1 is driven to pump the warmed cleaning water to the cleaning nozzle 14 and spray the cleaning water from the nozzle holes to clean the dishes 22 and the like. At this time, the cleaning nozzle 14 rotates by spraying the cleaning water, and sprays the cleaning water uniformly on the tableware 22 and the like. The cleaning water sprayed into the cleaning tank 2 falls and gathers in the lower part of the cleaning tank 2, is sprayed from the cleaning nozzle 14 again, and this circulation is repeated (cleaning process). In addition, since the upper surface opening part of the washing tank 2 is sealed with the inner lid 23, the washing water does not splash outside.

  When the set cleaning time has elapsed, the energization of the heater 13 and the cleaning pump 15 is stopped, and then the drainage pump 16 is driven to discharge the sewage in the cleaning tank 2 to the outside. When the drainage is completed, the energization to the drainage pump 16 is stopped, the water supply valve 17 is opened, and the cleaning water is supplied into the cleaning tank 2. Thereafter, rinsing of the tableware 22 and the like is performed by the same operation as the above-described washing process, and draining is performed when the rinsing washing for the set rinsing time is completed. Such rinsing and draining are repeated several times (rinsing step).

When the set number of rinsing steps is completed, the blower 18 and the second heater 20 are energized to introduce outside air into the cleaning tank 2. This outside air is heated by the second heater 20 to become warm air, and is sent into the washing tank 2 to dry the entire area of the tableware 22 and the like and the washing tank 2. The hot air after these are dried is shown in FIG. It is discharged to the outside from the exhaust port 10 (drying process).
When the set drying time has elapsed, the energization of the blower 18 and the second heater 20 is stopped, and the drying process ends. This completes the cleaning, rinsing and drying of the tableware 22 and the like. The series of operations are automatically performed according to a program set in the microcomputer 41 of the control unit 40.

  When taking out the tableware 22 or the like, the open switch 8 of the operation unit 6 shown in FIG. 2 is turned on, and the washing tank 2 is pushed forward from the front opening of the washing machine body 1 by the slide device 30, and the tableware basket 21 or the tableware is removed. Take out 22 etc. Since the operation of the slide device 30 at this time is the same as described above, the description thereof is omitted.

Next, a specific operation of the slide device 30 will be described with reference to FIGS. 5A to 5C. When the open switch 8 shown in FIG. 2 is inputted, as shown in FIG. 5A, the motor 36 is driven so as to rotate the pinion 37 in the direction of the arrow a. As a result, the slide shaft 33 attempts to protrude in the right direction in the drawing (hereinafter also referred to as advance).
At this time, the main body 31 that holds the slide shaft 33 is attached to the cleaning tank 2, and the tip of the slide shaft 33 is in contact with the rear wall of the cleaning machine main body 1. Therefore, as the pinion 37 rotates, the slide shaft 33 protrudes from the main body 31 and presses the rear wall of the cleaning machine main body 1. When the slide shaft 33 presses the rear wall of the cleaning machine main body 1, the cleaning tank 2 to which the main body 31 is attached is pushed forward from the opening of the cleaning machine main body 1. At this time, as described above, since the washing tub 2 is locked to the washing machine main body 1 by the latch 11, the slide shaft 33 unlocks the latch 11, and the tableware 22, the heater 13 and the washing A force is applied between the washing machine main body 1 and the washing tank 2 so as to push out the heavy washing tank 2 in which the nozzles 14 and the like are accommodated. The motor 36 rotates the pinion 37 to advance the slide shaft 33 until the advance position detector 39 detects it.

  When the washing tub 2 is pushed forward from the opening of the washing machine body 1, the motor 36 is driven to rotate the pinion 37 in the direction of arrow b as shown in FIG. 5B. That is, the motor 36 is rotated in the direction opposite to the rotation direction shown in FIG. 5A, and the slide shaft 33 is pulled back in the illustrated left direction (hereinafter also referred to as retreat). At this time, the tip of the slide shaft 33 moves in a direction away from the rear wall of the cleaning machine body 1. Then, as shown in FIG. 5C, the slide shaft 33 is accommodated in the main body 31 with the reverse rotation of the pinion 37. The motor 36 rotates the pinion 37 in the reverse direction to retract the slide shaft 33 until the retracted position detection unit 38 detects it.

  As described above, compared to when the slide shaft 33 is pulled back, the load on the slide device 30 increases when the slide shaft 33 protrudes and the cleaning tank 2 is pushed out. This is because when the washing tank 2 is pushed out, the slide device 30 releases the lock of the latch 11 and pushes out the heavy washing tank 2 in which the tableware 22, the heater 13, the washing nozzle 14 and the like are housed. It is necessary to apply a force between the main body 1 and the cleaning tank 2. In comparison with this, when the slide shaft 33 is pulled back, the slide device 30 only moves the slide shaft 33 in a direction away from the rear wall of the cleaner body 1. For this reason, for example, when the same drive voltage is input to the motor 36, the rotation speed of the motor 36 increases when the slide shaft 33 is retracted compared to when the slide shaft 33 protrudes, and the operation of the motor 36 is increased. The sound becomes loud. Therefore, in this embodiment, the input to the motor 36 is performed so that the slide shaft 33 is pulled back at a speed equal to or lower than the speed at which the slide shaft 33 is pushed out.

  For example, when the speed at which the slide shaft 33 is pushed out and the speed at which the slide shaft 33 is pulled back are the same, the operation sound of the motor 36 is the same when the slide shaft 33 is pushed out and pulled back. This is because the rotation speed of the motor 36 is equal at this time. For this reason, the user who uses the dishwasher 100 does not feel uncomfortable with the change in the operation sound of the motor 36.

  In addition, when the slide shaft 33 is retracted at a slower speed than when the slide shaft 33 is pushed out, the operation sound of the motor 36 is reduced when the slide shaft 33 is retracted, so that the quietness of the dishwasher 100 is improved. ing.

  Switching of the input to the motor 36 is performed by the slide device control unit 29 shown in FIG. For example, as shown in FIG. 6, the slide device control unit 29 includes a switching unit 28 that switches between the input voltage x <b> 1 and the input voltage x <b> 2 and performs input to the motor 36. The switching unit 28 switches between the input voltage x1 and the input voltage x2 based on an instruction from the microcomputer 41. For example, the input voltage x1 when pushing out the slide shaft 33 is 24V, and the input voltage x2 when pulling back the slide shaft 33 is 15V smaller than the input voltage x1.

  Further, as shown in FIG. 7, the slide device control unit 29 includes a rotation detection unit 27 that detects the number of rotations of the motor 36 and a PWM drive unit 26 that changes the duty ratio of the voltage supplied to the motor 36. It may be configured. The microcomputer 41 drives the motor 36 by controlling the PWM drive unit 26 based on the rotation speed of the motor 36 detected by the rotation detection unit 27. At this time, when the slide shaft 33 is pulled back, the duty ratio of the input voltage is made smaller than when the slide shaft 33 is pushed out. In this way, the input to the motor 36 when the slide shaft 33 is pulled back can be reduced.

  As described above, in this embodiment, the heavy washing tub 2 in which the tableware 22 and the like are stored is automatically pushed forward from the opening of the washing machine main body 1 by the slide device 30. Therefore, in this embodiment, an easy-to-use dishwasher that does not require a large force for pulling out the washing tub 2 can be obtained.

  Moreover, in this embodiment, since the slide device 30 is configured to push out the cleaning tank 2, the cleaning tank 2 that is conventionally formed on the door (front plate) 4 side of the cleaning tank 2 is pulled out. The handle for this is omitted. For this reason, in this embodiment, the dishwasher 100 excellent in the designability is obtained.

In this embodiment, as described above, since the slide device 30 is configured to push out the cleaning tank 2, a large force is not required when the user pulls out the cleaning tank 2. Therefore, as shown in FIG. 8, the door 4 of the cleaning tank 2 can be provided with a small handle 50 that does not impair the design.
As shown in FIG. 9, a tact switch 51 a and a switch lever 51 b are arranged inside the handle 50, and these constitute an open switch 51. When the handle 50 thus configured is gripped by the user, the switch lever 51b is operated, and this operation is detected by the tact switch 51a. Based on the detection result of the tact switch 51a, the slide device 30 is controlled.
Thus, by providing the handle 50 on the door 4 of the cleaning tank 2, the open switch 8 of the operation unit 6 shown in FIG. 2 can be eliminated, and the operability is improved by employing the open switch 51. Thus, the design and operability of the dishwasher 100 are improved.

  Moreover, in the dishwasher 100 of this embodiment, since the motor 36 is driven so as to pull back the slide shaft 33 at a speed equal to or lower than the speed at which the slide shaft 33 is pushed out, quietness is improved and energy saving is achieved. Has been achieved. This is because when the motor 36 is driven so as to pull the slide shaft 33 back, the input to the motor 36 is made small, and the rotational speed of the motor 36 is small.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. That is, the configuration of the above embodiment may be improved as appropriate, or at least a part of the configuration may be replaced with another configuration. Further, the configuration requirements that are not particularly limited with respect to the arrangement are not limited to the arrangement disclosed in the embodiment, and can be arranged at a position where the function can be achieved.

  1 Cleaning machine body, 2 cleaning tank, 3 rails, 4 doors, 5 operation panel, 6 operation section, 7 start / pause switch, 8 open switch, 9 display section, 10 exhaust port, 11 latch, 12 spring, 13 heater , 14 Washing nozzle, 15 Washing pump, 16 Drainage pump, 17 Water supply valve, 18 Blower, 19 Air passage, 20 Second heater, 21 Tableware basket, 22 Tableware, 23 Inner lid, 26 PWM drive unit, 27 Rotation detection unit 28 switching unit 29 slide device control unit 30 slide device 31 body unit 32 groove 33 slide shaft 34 rack 35 holding unit 36 motor 37 pinion 38 reverse position detection unit 39 forward position detection unit , 40 control unit, 41 microcomputer, 42 water amount detection means, 43 temperature detection means, 44 door open detection , 46 notification unit, 50 a handle, 51 open switch, 51a tact switch, 51b switch lever, 100 dishwasher.

Claims (9)

A washer body having an opening;
A washing tank accommodated in the washing machine body;
A slide device that includes a slide shaft and a drive unit that drives the slide shaft to be pushed out or pulled back, and a slide device that pushes out the slide shaft and pushes out the cleaning tank from the cleaning machine body;
A control unit that performs control so as to pull back the slide shaft at a speed equal to or less than a speed at which the slide shaft is pushed out;
Have a, a detector which detects the rotation speed of the drive unit,
The controller is configured to control the drive unit so that the following rotational speed is obtained when the slide shaft is pushed out when the slide shaft is pulled back .   2. The tableware according to claim 1, wherein the slide shaft is pulled back in a direction away from the cleaning tank or the main body of the cleaning machine after pushing out the cleaning tank in contact with the cleaning tank or the main body of the cleaning machine. washing machine.   3. The dishwasher according to claim 1, wherein the control unit performs control so that the slide shaft is pulled back at a speed slower than a speed at which the slide shaft is pushed out.   4. The control unit according to claim 1, wherein the control unit performs control so as to change a voltage supplied to the driving unit between when the slide shaft is pushed out and when the slide shaft is pulled back. A dishwasher according to claim 1.   5. The control unit according to claim 1, wherein when the slide shaft is pulled back, control is performed such that a voltage supplied to the drive unit is lower than when the slide shaft is pushed out. A dishwasher according to claim 1.   The control unit performs control so as to change a duty ratio of a voltage supplied to the driving unit between when the slide shaft is pushed out and when the slide shaft is pulled back. 6. The dishwasher according to any one of 5 above.   The said control part performs control so that the duty ratio of the voltage supplied to the said drive part may be made smaller when pulling back the said slide shaft than when pushing out the said slide shaft. The dishwasher of any one of 6. The dishwasher according to any one of claims 1 to 7 , wherein the driving unit includes a pinion that meshes with a rack provided on the slide shaft. The cleaning tank is held by a latch when accommodated in the cleaning machine body,
The said slide shaft makes force act on the said washing tank so that holding | maintenance of the said latch may be canceled when pushing out the said washing tank, The any one of Claims 1-8 characterized by the above-mentioned. Dishwasher.

Images