JP4334444B2 - dishwasher - Google Patents

Description

  The present invention includes a plurality of nozzles for injecting water in a washing tub in which tableware is stored, switching means for switching between nozzles for injecting water, and detection means for detecting the degree of water contamination in the washing tub. The invention relates to a dishwasher that performs washing and rinsing.

The dishwasher is configured to dispose a rotatable nozzle on the bottom side in the washing tub, and wash the tableware stored in the washing tub with water sprayed from the nozzle (for example, Patent Documents). 1). There is also known a dishwasher in which a plurality of rotatable nozzles are juxtaposed on the bottom side in the washing tank. Such a dishwasher including a plurality of nozzles includes a rotary distribution valve that alternately supplies pressurized water generated by a pump to each nozzle at equal time intervals. By switching the nozzles for injecting water at regular intervals, it is possible to reduce the amount of water used compared to the case of injecting water from all nozzles.
JP-A-7-163502

  However, simply switching the nozzle that sprays water at regular intervals makes cleaning or rinsing efficient, for example, spraying water unnecessarily to parts that do not contain dishes, or dishes that are less dirty. There is a problem that things can not be done.

  The present invention has been made in view of such circumstances, and is configured such that detection of the degree of water contamination is performed when the switching means switches the nozzles that eject water, so that each nozzle has water. An object of the present invention is to provide a dishwasher that can individually detect the degree of soiling of the tableware that sprays.

  In addition, the present invention is configured such that the detection means detects the degree of water contamination after a predetermined time has elapsed since the nozzle for injecting water is switched, so that the nozzle after the switching injects water. Another object is to provide a dishwasher capable of reliably detecting dirt.

  The present invention also includes a storage unit that stores the degree of water contamination detected by the detection unit, thereby storing the degree of water contamination detected when water is ejected from each of the plurality of nozzles. Another object is to provide a dishwasher that can.

  In addition, the present invention is provided with a display means for displaying the degree of water contamination stored in the storage unit, so that the user can check the degree of contamination of the tableware from which each nozzle sprays water. Another purpose is to provide a machine.

  In addition, the present invention provides a changing means for changing the timing for switching the nozzle that sprays the water based on the degree of dirt of water stored in the storage unit, so that the degree of detected dirt is small. It is another object of the present invention to provide a dishwasher that can efficiently perform washing or rinsing by shortening the nozzle injection time.

  Further, the present invention is configured to change the cleaning time and the number of times of rinsing with the changing means on the basis of the degree of dirt of water stored in the storage unit, so that a nozzle with a small degree of detected dirt is used. Another object of the present invention is to provide a dishwasher that can efficiently perform washing or rinsing by reducing the washing time and the number of times of rinsing.

  In addition, the present invention provides a dishwasher that allows the user to confirm changes in nozzle switching timing, washing time, number of times of rinsing, etc., by configuring the display means to display changes made by the changing means. For other purposes.

  The dishwasher according to the present invention includes a plurality of nozzles for injecting water in a washing tub in which tableware is stored, switching means for switching between nozzles for injecting water, and detection for detecting the degree of contamination of water in the washing tub. In the dishwasher that performs cleaning and rinsing, the detection means is configured to detect the degree of water contamination when the switching means switches the nozzle that sprays water. It is characterized by.

  The dishwasher according to the present invention is characterized in that the detection means is configured to detect the degree of water contamination after a predetermined time has elapsed since the nozzle for spraying water was switched.

  The dishwasher according to the present invention includes a storage unit that stores the degree of water contamination detected by the detection unit.

  The dishwasher according to the present invention is characterized by comprising display means for displaying the degree of contamination of water stored in the storage unit.

  The dishwasher according to the present invention includes a changing unit that changes a timing at which the switching unit switches a nozzle that ejects water based on a degree of contamination of water stored in the storage unit.

  The dishwasher according to the present invention is characterized in that the changing means is configured to change the cleaning time and the number of times of rinsing based on the degree of contamination of water stored in the storage unit.

  The dishwasher according to the present invention is characterized in that the display means is configured to display the contents of change by the change means.

  In the present invention, the detection means detects the degree of contamination of water when the switching means switches the nozzle that ejects water. The detection means controls, for example, a sensor capable of outputting a signal corresponding to the degree of water contamination, operates the sensor to output a signal, and determines the degree of water contamination based on the output signal. Detect. By detecting the degree of dirt when the nozzles are switched, it is possible to individually detect the degree of dirt on the tableware from which each nozzle sprays water. For example, when two nozzles are provided on the left and right, it is possible to individually detect the degree of contamination of the tableware from which the left and right nozzles respectively spray water.

  In the present invention, the degree of water contamination is detected by the detecting means after a predetermined time has elapsed since the nozzle for jetting water was switched. For example, when two nozzles are provided on the left and right, the left and right nozzles are switched to inject water, but immediately after the switching, there is a possibility that the nozzle before switching will detect stains on the tableware that sprays water. By detecting the degree of soiling after a predetermined time has elapsed since switching the nozzle, it is possible to reliably detect the soiling of the tableware from which the nozzle after switching sprays water.

  In the present invention, the degree of water contamination detected by the detection means is stored in the storage unit. For example, when two nozzles are provided on the left and right, the degree of contamination detected when water is ejected from the left and right nozzles is stored.

  In the present invention, the degree of water contamination stored in the storage unit is displayed on a display means such as an LCD (Liquid Crystal Display). For example, when two nozzles are provided on the left and right, the degree of contamination detected when water is ejected from each nozzle is displayed. In this case, the user can confirm the degree of contamination of the left and right tableware from which the left and right nozzles respectively spray water.

  In the present invention, the switching means switches the nozzle from which the water is jetted by the changing means based on the degree of water contamination stored in the storage unit. For example, when the level of dirt detected when water is jetted from one of the two nozzles is smaller than the level of dirt detected when water is jetted from the other, the tableware arranged on the one nozzle side Is less contaminated than the dishes arranged on the other nozzle side, and there is no problem even if the ejection time of one nozzle is shorter than the ejection time of the other nozzle. Cleaning or rinsing can be performed efficiently by shortening the ejection time of the nozzle with the smaller detected dirt.

  In the present invention, the cleaning time and the number of times of rinsing are changed by the changing means based on the degree of water contamination stored in the storage unit. For example, when the level of dirt detected when water is jetted from one of the two nozzles is smaller than the level of dirt detected when water is jetted from the other, the tableware arranged on the one nozzle side Is less contaminated than the tableware arranged on the other nozzle side, and it is problematic if the cleaning time and the number of times of rinsing of the tableware arranged on one nozzle side are less than those of the tableware arranged on the other nozzle side. There is no. Cleaning or rinsing can be performed efficiently by reducing the cleaning time and the number of times of rinsing using the nozzle with the smaller detected dirt.

  In the present invention, the contents changed by the changing means are displayed on the display means. Therefore, the user can confirm that the nozzle switching timing, the cleaning time, the number of times of rinsing, and the like have been changed.

  According to the present invention, it is possible to individually detect the degree of contamination of tableware from which each nozzle ejects water.

  ADVANTAGE OF THE INVENTION According to this invention, the stain | pollution | contamination of the tableware which the nozzle after switching injects water can be detected reliably.

  According to the present invention, it is possible to store the degree of contamination of a plurality of waters detected when water is ejected from each of a plurality of nozzles.

  According to the present invention, the user can confirm the degree of contamination of the tableware from which each nozzle ejects water.

  According to the present invention, it is possible to efficiently perform cleaning or rinsing by shortening the ejection time of a nozzle with a small degree of detected dirt. For example, the cleaning or rinsing time can be shortened and the amount of water used can be reduced without reducing the degree of dirt removal.

  According to the present invention, it is possible to efficiently perform cleaning or rinsing by reducing the cleaning time and the number of times of rinsing using a nozzle with a small degree of detected dirt. For example, the cleaning or rinsing time can be shortened and the amount of water used can be reduced without reducing the degree of dirt removal.

  According to the present invention, the user can confirm changes in nozzle switching timing, cleaning time, number of times of rinsing, and the like. For example, it is possible to prevent a user from mistaking a nozzle switching timing, a cleaning time, a number of times of rinsing, and the like that are different from normal ones as a failure.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 1 is a longitudinal side view showing a schematic configuration of a dishwasher according to the present invention, FIG. 2 is a longitudinal front view showing the schematic configuration of the dishwasher, and FIG. 3 is a plan view showing the schematic configuration of the dishwasher.

  The dishwasher includes a housing 1, a washing tank 2 disposed in the housing 1 and having an opening 2 a on the front surface thereof, and a bowl-shaped dish receiving device in which the dish A is placed. A tool 3 and a rotatable first nozzle 4 and a second nozzle 5 that are rotatably arranged below the tableware holder 3 and spray water toward the tableware A placed on the tableware holder 3. And a pump 7 for supplying pressurized water to the first and second nozzles 4 and 5, and a communication path between the pump 7 and the nozzles 4 and 5 is opened and closed, and the pressurized water generated by the pump 7 is supplied to the first nozzle 4 or An on-off valve 8 that selectively supplies the second nozzle 5; a control device 9 that controls the on-off valve 8 to control the injection time of the first nozzle 4 and the injection time of the second nozzle 5; The heater 10 that dries the inside of the housing 2 and the top and bottom of the opening 2a are closed and pivotally supported by the housing 1 so as to be rotatable in the vertical direction. And a door 11 and lower door 12. An operation panel 26 having a display unit such as an LCD and an input unit such as a push button switch is provided below the lower door 12.

  A water supply valve 13 connected to a water source such as a faucet, a water supply port 14 that communicates with the water supply valve 13 through a water supply passage and opens into the cleaning tank 2, and the water supply port 14 are provided at the bottom of the cleaning tank 2. And a water storage part 15 for storing the water supplied from the water supply port 14, and a pump that communicates with the water storage part 15 through a suction duct and sucks and pressurizes the water in the water storage part 15. 7, an on-off valve 8, a heater 10 disposed in a flow channel between the water supply port 14 and the water storage unit 15, and a turbidity sensor 28 described later. In addition, a blower 18 that sucks and pressurizes the air in the cleaning tank 2 and a blower outlet 19 that blows out the pressurized air pressurized by the blower 18 into the cleaning tank 2 are provided in the rear part of the cleaning tank 2. ing.

  The first and second nozzles 4 and 5 have a plurality of injection ports 4a and 5a, respectively. The first and second nozzles 4, 5 communicate with the two outlet ports of the on-off valve 8, and are rotatably fitted to two communication pipes that project upward from the inner bottom of the cleaning tank 2. A plurality of injection ports 4a and 5a are provided at positions orthogonal to the rotation center line of the base tube portion, and are arranged side by side on the both sides in the cleaning tank 2 and configured to inject toward the upper side of the cleaning tank 2. Yes. The first and second nozzles 4 and 5 are rotated by an electric motor (not shown) controlled by the control device 9.

  The on-off valve 8 has a valve body linked to the output shaft of the electric motor 22, and the first and second nozzles 4, 5 and the outlet ports are connected while the valve body makes one rotation. The communication time is made different, and the injection time for injection from the first and second nozzles 4 and 5 is made different. The electric motor 22 is controlled by the control device 9.

  The turbidity sensor 28 includes a light emitting unit 28 a and a light receiving unit 28 b disposed so as to face each other, and is connected to the control device 9. Under the control of the control device 9, light emitted from the light emitting unit 28a and transmitted through the wash water passing between the light emitting unit 28a and the light receiving unit 28b is received by the light receiving unit 28b. The received light amount is sent to the control device 9, and the control device 9 calculates the degree of dirt of the cleaning water based on the light quantity of the light received by the light receiving unit 28b, and the first degree based on the calculated degree of dirt. , Controls the electric motor that drives the second nozzles 4 and 5, the pump 7, the on-off valve 8 (electric motor 22), and the like.

  FIG. 4 is a block diagram showing the configuration of the control device 9 for the dishwasher according to the present embodiment. As shown in FIG. 4, the control device 9 includes a CPU (Central Processing Unit) 31, a ROM (Read Only Memory) 32, a RAM (Random Access Memory) 33, a clock 34 for measuring time, an input / output port 35, and the like. These are connected to each other by an internal bus 36. An operation panel 26, a turbidity sensor 28, an electric motor for driving the first and second nozzles 4 and 5, a pump 7, an electric motor 22, and the like are connected to the input / output port 35.

  The CPU 31 of the control device 9 uses the RAM 33 as a working area, executes a program stored in the ROM 32, determines a sequence for washing and rinsing dishes, and controls each part in the dishwasher. For example, the control device 9 displays on the operation panel 26, accepts an operation from the operation panel 26, and controls each component according to the accepted operation.

  The on-off valve 8 and the electric motor 22 operate as switching means for switching the nozzles 4 and 5 for injecting water, and the turbidity sensor 28 and the control device (CPU 31) 9 detect the degree of water contamination in the cleaning tank 2. It operates as a detecting means. When the nozzles 4 and 5 for jetting water are switched, the control device 9 controls the turbidity sensor 28 (activates the light emitting unit 28a) to detect the degree of water contamination. For example, the degree of water contamination is detected after a predetermined time has elapsed after the nozzles 4 and 5 for jetting water are switched. In addition, the RAM 33 of the control device 9 operates as a storage unit that stores the detected degree of water contamination.

  The control device 9 (CPU 31) controls the on-off valve 8 (electric motor 22) based on the degree of water contamination stored in the RAM 33, and changes the timing for switching the nozzles 4 and 5 for injecting water. Acts as a means. In addition, the control device 9 is based on the degree of water contamination stored in the RAM 33, an electric motor that drives the first and second nozzles 4 and 5, a pump 7, an on-off valve 8 (electric motor 22), and the like. To change the washing time and the number of times of rinsing. For example, if there is a difference in the level of each detected stain, change the cleaning time and number of times of rinsing with a smaller level of dirt, or change the time of washing and the number of times of rinsing with a higher level of contamination to a larger amount. Is possible. The operation panel 26 operates as a display unit that displays the degree of water contamination stored in the RAM 33 and the above-described change contents.

  FIG. 5 is a flowchart illustrating an example of a cleaning and rinsing process procedure. The control device 9 controls the water supply valve 13 to perform a water supply process (S10). In the water supply process, first, the control device 9 opens the water supply valve 13, and when the detection value of a water level sensor (not shown) connected to the control device 9 reaches a predetermined value stored in the ROM 32, the control device 9 sets the water supply valve 13. Close. Next, the control device 9 controls the pump 7, the electric motor 22, and the like, and starts water injection from one of the nozzles (S12). After the elapse of a predetermined time stored in the ROM 32 from the start (S14: YES), the control device 9 controls the pump 7 and the like to stop the injection (S16), and controls the turbidity sensor 28 to control the degree of contamination. Detection is performed (S18), calculation processing based on the degree of contamination detected during a predetermined time stored in the ROM 32 is performed, and the calculation result is stored in the RAM 33 (S20). In the arithmetic processing, for example, the degree of contamination detected during a predetermined time can be stored in the RAM 33 and accumulated.

  Next, the control device 9 controls the pump 7 and the electric motor 22 to switch the nozzles (S22), and starts jetting water from the other nozzle (S24). After the elapse of a predetermined time stored in the ROM 32 from the start (S26: YES), the control device 9 controls the pump 7 and the like to stop the injection (S28), and controls the turbidity sensor 28 to control the degree of contamination. Detection is performed (S30), calculation processing based on the degree of contamination detected during a predetermined time stored in the ROM 32 is performed, and the calculation result is stored in the RAM 33 (S32). The arithmetic processing is the same as the arithmetic processing (S20) described above.

  Subsequently, the control device 9 reads out the above-described two calculation results from the RAM 33 and displays them on the operation panel 26 (S34). Next, the control device 9 determines a cleaning and rinsing sequence based on the above-described two calculation results (S36). For example, if the calculation result when switching to the first nozzle 4 (for example, the cumulative total of the degree of contamination) is smaller than the calculation result when switching to the second nozzle 5, the tableware on the first nozzle 4 side is There is less dirt than the tableware on the second nozzle 5 side, and the spraying time of the first nozzle 4, the cleaning time of the tableware on the first nozzle 4 side and the number of times of rinsing are made smaller than those of the second nozzle 5. A sequence in which the ejection time of the first nozzle 4, the cleaning time of the tableware on the first nozzle 4 side and the number of times of rinsing are reduced is determined and stored in the RAM 33. The control device 9 reads the determined sequence from the RAM 33 and displays it on the operation panel 26 (S38). Based on the determined sequence, the control device 9 controls the pump 7 and the electric motor 22 to perform the cleaning process and the rinsing process (S40). ).

  In the above-described embodiment, the dishwasher including two nozzles has been described as an example. However, the number of nozzles is not limited to two, and may be three or more. When three nozzles are provided, the nozzle for spraying water is switched three times, the degree of contamination is detected three times, and the washing and rinsing sequence is determined based on the detected degree of contamination.

It is a vertical side view which shows schematic structure of the dishwasher which concerns on this invention. It is a vertical front view which shows schematic structure of a dishwasher. It is a top view which shows schematic structure of a dishwasher. It is a block diagram which shows the structure of the control apparatus of a dishwasher. It is a flowchart which shows the example of the process sequence of washing | cleaning and a rinse.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Washing tank 4 1st nozzle 5 2nd nozzle 4a, 5a Spout 7 Pump 8 On-off valve 9 Control device 22 Electric motor 26 Operation panel 28 Turbidity sensor 28a Light emission part 28b Light reception part 31 CPU
33 RAM
A Tableware

Claims (7)

Washing and rinsing comprising a plurality of nozzles for injecting water in a washing tub in which tableware is stored, a switching means for switching the nozzle for injecting water, and a detecting means for detecting the degree of contamination of water in the washing tub In the dishwasher
The dishwasher is characterized in that the detection means is configured to detect the degree of dirt on water when the switching means switches a nozzle for spraying water.   2. The dishwasher according to claim 1, wherein the detecting means is configured to detect the degree of water contamination after a predetermined time has elapsed since the nozzle for spraying water was switched.   The dishwasher according to claim 1, further comprising a storage unit that stores a degree of water contamination detected by the detection unit.   4. The dishwasher according to claim 3, further comprising display means for displaying the degree of water contamination stored in the storage unit.   The dishwasher according to claim 3 or 4, further comprising a changing unit that changes a timing at which the switching unit switches a nozzle for spraying water based on a degree of contamination of water stored in the storage unit. .   6. The dishwasher according to claim 5, wherein the changing means is configured to change the washing time and the number of times of rinsing based on the degree of contamination of water stored in the storage unit.   7. The dishwasher according to claim 6, wherein the display means is configured to display a change content by the change means.

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