JP4650360B2 - dishwasher - Google Patents

Description

  The present invention relates to a dishwasher for washing dishes.

Conventionally, noise countermeasures for this type of dishwasher have been implemented by providing soundproofing measures by the structure of the dishwasher and providing a low-noise course for driving the motor that drives the washing pump at a low speed (for example, Patent Documents). 1).
Japanese Utility Model Publication No. 4-130756

  However, one of the major causes of dishwasher noise is the sound of the sprayed washing water directly hitting the washing tank. The noise tends to increase as the ratio of direct hitting the washing tank increases. It is costly to take soundproofing measures for this problem with the structure, and in a low noise course in which the motor that drives the cleaning pump is driven at a low speed, it is related to the amount and type of tableware to be cleaned and the manner of arrangement. However, since the motor is driven at a low rotation speed, there is a problem that it takes time to achieve both cleaning performance and the like.

  Since the dishwasher is used when the user does not operate the device directly at the time of dinner after dinner or at night, the noise tends to hinder the appreciation of sleep, conversation, TV and the like.

  The present invention solves the above-described problems, and is not affected by the amount, type, and arrangement of dishes to be cleaned, and can be cleaned at an optimal cleaning time at a volume that matches the surrounding noise. The purpose is to provide a dishwasher to do.

In order to achieve the above object, a dishwasher according to the present invention includes a main body having a washing tub for storing objects to be washed such as tableware, a washing pump for pressurizing washing water in the washing tub, and the washing pump. A cleaning nozzle that sprays the cleaning water pressurized by the cleaning tank, a motor that drives the cleaning pump, a control unit that controls driving of the motor, and a volume detection unit that detects noise, The control means has a plurality of predetermined values according to the volume of ambient noise detected by the volume detection means when the motor is stopped, and the predetermined value determined from the output of the volume detection means of ambient sound when the motor is stopped If the output of the sound volume detecting means exceeds the predetermined value when driven at a motor speed corresponding to the motor, the motor is driven so that the output of the sound volume detecting means is below the predetermined value.
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  Thereby, it becomes possible to wash | clean with the optimal washing | cleaning time below a fixed noise, without being influenced by the quantity of the tableware used as a to-be-cleaned object, and the method of arrangement | positioning.

  The dishwasher of the present invention can be washed with an optimum washing time below a certain level of noise, regardless of the amount, type and arrangement of dishes to be washed.

The first invention includes a main body having a washing tank for storing an object to be washed such as tableware, a washing pump for pressurizing washing water in the washing tank, and washing water pressurized by the washing pump. A cleaning nozzle that injects into the tank; a motor that drives the cleaning pump; a control unit that controls driving of the motor; and a volume detection unit that detects noise; and the control unit detects the noise when the motor is stopped. It has a plurality of predetermined values according to the volume of ambient noise detected by the volume detection means, and is driven at a motor rotation speed corresponding to the predetermined value determined from the output of the volume detection means of the ambient sound when the motor is stopped When the output of the volume detection means exceeds the predetermined value, by driving the motor so that the output of the volume detection means is less than or equal to the predetermined value , the amount and type of tableware to be cleaned, How to place left It is possible to perform cleaning with an optimal cleaning time below a certain level of noise, and optimally below the noise corresponding to the volume of ambient noise measured by the volume detection means before operation or when the cleaning pump is stopped. Cleaning can be performed in the cleaning time.

  In the second invention, in particular, by providing the sound volume detecting means of the first invention on the outer shell of the main body, the noise of the entire dishwasher and the ambient noise can be accurately measured.

  In the third invention, in particular, the volume detection means of the first invention is provided between the washing tub and the outer shell of the main body, thereby avoiding the influence of reflection from the vicinity of the main body of the dishwasher, and the entire dishwasher. Noise and ambient noise can be measured accurately.

In the fourth invention, in particular, the volume detection means of the first invention is provided outside the dishwasher body, and the output of the volume detection means is input to the control means via the communication means. It becomes possible to accurately grasp the volume of the ambient noise and the influence of the driving sound on the ambient noise, and it is possible to perform the cleaning in the optimum cleaning time with the noise equal to or less than the volume of the ambient noise.

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

(Embodiment 1)
1 to 3, reference numeral 1 denotes a washing tank formed in the main body 2 of the dishwasher, which is installed so as to be able to take out a tableware basket 3 for setting tableware to be washed. A water storage section 4 for storing water is provided at the bottom of the cleaning tank 1. Water is supplied to the cleaning tank 1 through a water supply path (not shown) provided with a water supply valve (not shown) for stopping or supplying tap water, and the supplied water is kept at a predetermined water level. This is performed by a water level control means (not shown) including a water level sensor (not shown) and a control circuit.

  A cleaning pump 5 pressurizes the water stored in the water storage unit 4. The rotating shaft 7 of the impeller 6 in the cleaning pump 5 and the rotating shaft 7 of the motor 8 that is a driving source of the cleaning pump 5 are concentric and substantially vertical. The cleaning pump 5 is disposed below the motor 8. Reference numeral 9 denotes a suction path through which cleaning water flows into the cleaning pump 5, which is provided between the cleaning pump 5 and the motor 8 that drives the cleaning pump 5, and is located near the center so as to surround the rotating shaft 7 of the impeller 6. Forming.

  The cleaning pump 5 is a centrifugal type in which the impeller 6 can be reversed in the forward and reverse directions. During forward rotation, the cleaning water is discharged from the first discharge port 10 and supplied to the cleaning nozzle 11, and the injection port 12 enters the cleaning tank 1. Spray. The cleaning nozzle 11 is provided so as to be rotatable in the horizontal direction, and is rotated by a reaction force when the cleaning water is sprayed from the spray port 12 so that it can be sprayed over a wide range in the cleaning tank 1.

  A switching valve 13 closes the second discharge port 14 by the flow of cleaning water generated in the cleaning pump 5 toward the first discharge port 10 when the impeller 6 rotates in the forward direction. The second discharge port 14 is opened as a result of the reverse flow of the washing water at the time of rotation. By the operation of the switching valve 13, when the cleaning pump 5 is reversely rotated, the cleaning water is discharged from the second discharge port 14 to the outside of the apparatus.

  The drainage operation can also be performed by a drainage pump (not shown) provided separately from the cleaning pump 5, and these operations are performed by the control means 21 that controls the drive of the motor 8.

  A heater 15 heats the water stored in the water storage unit 4 and heats the air supplied into the cleaning tank 1 by a blowing means (not shown) during drying. Reference numeral 16 denotes a filter that supplements the leftovers attached to the tableware.

  Next, the operation in the above embodiment will be described. First, tap water is supplied to the inside of the washing tank 1 by a water storage amount control means (not shown), stored in the water storage section 4 provided at the bottom of the washing tank 1, and stopped at a predetermined water level. . Next, the cleaning pump 5 rotates forward, and the cleaning water in the water storage section 4 is pressurized by the cleaning pump 5 and enters the cleaning pump 5 through the suction path 9 through the suction port 17 provided at the top of the impeller 6. Washing water is discharged from the first discharge port 10 and supplied to the cleaning nozzle 11, and cleaning is performed by spraying from the injection port 12 toward the tableware placed in the tableware basket 3 in the cleaning tank 1.

  The wash water from which the dishes have been cleaned returns to the water storage unit 4 again. The cleaning water is heated by the heater 15 and becomes a moderately high temperature set in advance to increase the cleaning power. Contaminants of the cleaning water that has been cleaned are captured by the filter 16 and circulated to the cleaning pump 5 again. To prevent the reattachment of contaminants during cleaning. When the predetermined cleaning is completed, the cleaning pump 5 is reversed and the cleaning water is discharged from the second discharge port 14 to the outside of the apparatus.

  During these cleaning steps, the volume of noise generated during driving is detected by the volume detector 18. As noise generated during the operation of the dishwasher, fluid sound generated in the path from the cleaning pump 5 and the suction path 9 to the cleaning nozzle 11, motor sound generated by the motor 8, and cleaning water are sprayed from the injection port 12. Spray sound, impact sound of sprayed washing water hitting tableware or washing tub 1, dripping sound generated when washing water after hitting tableware or washing tub 1 falls on the surface of water storage unit 4 or directly to washing tub 1 and so on.

  Among these, the collision sound that the sprayed washing water hits the dishes and the washing tub 1 increases the ratio of the sprayed washing water directly hitting the washing tub 1 depending on the amount, type and arrangement of the dishes to be cleaned. Noise tends to increase. Moreover, the washing water which directly hits the washing tank 1 hardly contributes to washing.

  As shown in FIG. 4, the control unit 21 detects the volume of noise generated by the dishwasher during operation by the volume detection unit 18, and when the volume is higher than a predetermined value, the injection port 12 of the washing nozzle 11. Reduce the amount of cleaning water sprayed from the top. The injection amount reduction means is performed by lowering the rotation speed of the motor 8 that drives the cleaning pump 5 by the control means 21.

  As shown in FIG. 5, the control means 21 always detects the volume of noise generated by the dishwasher during operation by the volume detection means 18, and if the volume is higher than a predetermined value, the washing nozzle 11 is stepwise. The amount of cleaning water sprayed from the nozzle 12 may be lowered.

  As a means for reducing the injection amount, as shown in FIGS. 6A and 6B, a path loss increasing means 20 such as a ball valve is provided in the circulation path 19 that communicates the cleaning tank 1 and the cleaning nozzle 11, A configuration in which the path loss is changed by the path loss increasing unit 20 to vary the jetting power of the cleaning water may be employed.

  Further, when a plurality of cleaning nozzles 11 are provided, the number of cleaning nozzles 11 to which cleaning water is simultaneously conveyed from the cleaning pump 5 may be switched. The sound volume detection by the sound volume detection means 18 is more suitable for the time average considering the variation than the instantaneous value. Further, the operation time may be extended in order to ensure the cleaning performance according to the reduction of the injection amount.

  Further, as shown in FIG. 7, the control means 21 has a plurality of predetermined values corresponding to the volume of the ambient noise, and measures the volume of the ambient noise by the volume detection means 18 before driving or during a pause. Alternatively, the cleaning water may be jetted so as to be equal to or less than a predetermined value corresponding to the measured volume of ambient noise.

  After the operation is started, the predetermined value 1 is determined from the output of the ambient sound volume detection means 18 when the motor 8 is stopped until t1. The motor 8 is driven from t1 to perform cleaning. At that time, when the output of the sound volume detection means 18 during operation exceeds a predetermined value 1 due to the surrounding environment, the amount, type, arrangement, etc. of the tableware, the rotation number of the motor 8 is reduced by the control means 21, etc. Reduce the amount of cleaning water spray. As a result, the cleaning can be performed with an operation sound of t1 or less from the predetermined value 1. Since the ambient sound has decreased since t3, the output of the sound volume detection means 18 during operation decreases. Here, since the motor 8 is driven continuously, a decrease in ambient sound cannot be detected, so the motor 8 is driven at the same rotation speed.

  The motor 8 stops at t4, and a predetermined value 2 is determined from the output of the sound volume detection means 18 until t5, thereby detecting a decrease in ambient sound. Cleaning is performed by driving the motor 8 again from t5. Since the output of the sound volume detecting means 18 during operation exceeds a predetermined value 2, the control means 21 lowers the number of revolutions of the motor 8 and so on. Decrease the amount. As a result, cleaning can be performed with an operation sound of a predetermined value 2 or less from t6.

  Further, the sound volume detection means 18 may be a means for detecting sound from a microphone, or a means for detecting vibration by a vibration sensor or the like.

  In order to accurately grasp the noise of the entire dishwasher and the surrounding noise, the volume detecting means 18 is installed on the outer periphery of the main body 2 and avoids the influence of reflection from the vicinity of the main body 2 of the dishwasher. In order to accurately grasp the noise of the entire dishwasher and the surrounding noise, for example, as shown in FIG. 8, it is provided between the washing tank 1 and the outer shell 22 of the main body 2, and the amount and type of dishes to be cleaned, In order to accurately grasp the variation in the operation sound depending on the arrangement, for example, it is provided on the wall surface 21 in the cleaning tank 1 as shown in FIG.

  Further, the sound volume detection means 18 by the microphone is provided outside the main body 2 of the dishwasher, and the output of the sound volume detection means 18 is input to the control means 21 via the communication means (not shown). The volume of ambient noise and the influence of driving sound on ambient noise can be grasped at the installation location of any volume detection means 18 outside the dishwasher body 2, and the surroundings at the user's position can be detected. It is possible to perform cleaning in an optimal cleaning time with a noise level or less according to the volume of the noise.

  Further, since the sound volume detecting means 18 also has means for communicating with other equipment, it is possible to control the noise in the room including the other equipment, and for example, while watching TV, while maintaining only the volume of the TV. It becomes possible to operate in conjunction with, for example, driving by reducing the noise of other noise sources.

  Furthermore, since the sound volume detection means 18 is incorporated in the remote controller of another device (for example, TV), the above-described operation can be performed at a place closer to the user, and the volume of ambient noise at the user's position can be obtained. It is possible to perform cleaning with an optimal cleaning time with a noise level corresponding to or less.

  As described above, according to the present embodiment, the motor 8 that drives the cleaning pump 5, the control means 21 that controls the driving of the motor 8, and the volume detection means 18 that detects noise are provided, and the control is performed. The means 21 is configured to inject the cleaning water so that the sound volume of the operation sound detected by the sound volume detection means 18 when the cleaning pump 5 is driven is equal to or lower than a predetermined value.

  Thereby, it becomes possible to wash | clean with the optimal washing | cleaning time below a fixed noise, without being influenced by the quantity of the tableware used as a to-be-cleaned object, and the method of arrangement | positioning.

  As described above, the dishwasher according to the present invention can be washed with an optimal washing time with a certain level of noise or less, regardless of the amount, type, and arrangement of dishes to be cleaned. Useful as a dishwasher.

Sectional drawing of the dishwasher of Embodiment 1 of this invention Enlarged sectional view of the washing pump and motor of the dishwasher Inside plan view of the washing pump of the dishwasher Time chart of the dishwasher Time chart of another example of the dishwasher (A) Cross section at the time of low pressure loss of the path loss increasing means of the dishwasher (b) Cross section at the time of the high pressure loss Time chart of another example of the dishwasher Cross section of another example of the dishwasher Cross section of another example of the dishwasher Cross section of another example of the dishwasher

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing tank 2 Main body 5 Washing pump 8 Motor 11 Washing nozzle 18 Volume detection means 21 Control means

Claims (4)

A main body having a washing tank for storing an object to be washed such as tableware, a washing pump for pressurizing washing water in the washing tank, and washing for injecting washing water pressurized by the washing pump into the washing tank A nozzle, a motor that drives the cleaning pump, a control unit that controls driving of the motor, and a volume detection unit that detects noise; and the control unit detects by the volume detection unit when the motor is stopped The sound volume detection means has a plurality of predetermined values according to the volume of ambient noise and is driven at a motor speed corresponding to a predetermined value determined from the output of the sound volume detection means of the ambient sound when the motor is stopped. A dishwasher that drives the motor so that the output of the sound volume detection means is less than or equal to the predetermined value . 2. The dishwasher according to claim 1, wherein the sound volume detecting means is provided on the outer shell of the main body. The dishwasher according to claim 1, wherein the volume detecting means is provided between the washing tank and the outer shell of the main body. 2. The dishwasher according to claim 1, wherein a volume detecting means is provided outside the dishwasher main body, and an output of the volume detecting means is input to the control means via the communication means.