EP2727511A2 - Geschirrspüler - Google Patents

Geschirrspüler Download PDF

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Publication number
EP2727511A2
EP2727511A2 EP13190311.4A EP13190311A EP2727511A2 EP 2727511 A2 EP2727511 A2 EP 2727511A2 EP 13190311 A EP13190311 A EP 13190311A EP 2727511 A2 EP2727511 A2 EP 2727511A2
Authority
EP
European Patent Office
Prior art keywords
washing
water
detergent
dishwasher
heater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13190311.4A
Other languages
English (en)
French (fr)
Other versions
EP2727511A3 (de
Inventor
Naoki Hiromatsu
Kiyoyasu Shinkai
Takuhiro MISHIMA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Original Assignee
Panasonic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Corp filed Critical Panasonic Corp
Publication of EP2727511A2 publication Critical patent/EP2727511A2/de
Publication of EP2727511A3 publication Critical patent/EP2727511A3/de
Withdrawn legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0028—Washing phases
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/09—Water level
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/12—Water temperature
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/06—Water heaters

Definitions

  • the present invention relates to a dishwasher that washes dishes or the like. More particularly, the present invention relates to a technique that heats a smaller amount of water than during washing before the dishwasher starts washing and obtains washing water with high temperature and high concentration to obtain high detergency from the start of washing.
  • a dishwasher in the related art includes an input device that sets an operation course or the like, and a control device that sequentially controls steps of washing, rinsing, drying and the like on the basis of setting of the input device.
  • the control device controls various electronic components such as a washing pump, a heater, a water supply valve and an air blowing fan to execute the respective steps of washing, rinsing and drying.
  • Patent Document 1 Japanese Patent Unexamined Publication No. 2003-174994
  • Fig. 9 is a side sectional view of a built-in type dishwasher in the related art.
  • washing tub 3 As shown in Fig. 9 , in the dishwasher in the related art, first, a user holds grip 18 and draws washing tub 3 in a front direction from main body 1. Then, the user puts washing object 7 such as a dish into washing tub 3 through opening 2 provided in an upper portion of washing tub 3.
  • the dishwasher operates washing pump 5 that is driven by a motor, and sprays washing water pressurized by washing pump 5 through washing nozzle 6.
  • washing and rinsing steps of washing object 7 are performed.
  • washing water for washing washing object 7, used in the washing and rinsing steps is supplied through water supply valve 15 attached to a rear portion of main body 1, and is reserved in water reserving section 4 of a bottom portion of washing tub 3.
  • auxiliary water tub 16 guides the washing water reserved in water reserving section 4 of the bottom portion of washing tub 3 into water level detecting device 20 that includes washing water level detecting device 20a and overflow water level detecting device 20b.
  • Washing water level detecting device 20a detects that a reference amount of water is reserved in washing tub 3.
  • overflow water level detecting device 20b detects that there is a possibility of overflow in a case where the water level in washing tub 3 reaches a predetermined water level or higher.
  • washing tub 3 is provided with kitchen waste collecting section 10 that includes a detachable kitchen waste collecting filter (not shown) and a loose drainage filter (not shown), at the lowest position in water reserving section 4.
  • Kitchen waste collecting section 10 is also used as a drainage port from washing tub 3 to washing pump 5.
  • control device 21 is provided in main body 1, and controls various electronic components such as washing pump 5, heater 8, water supply valve 15 and air blowing fan 17 to execute the respective steps of washing, rinsing and drying.
  • Fig. 10 is a flowchart illustrating the operation of the washing step of the dishwasher in the related art.
  • control device 21 starts the operation of the dishwasher on the basis of the setting of input device 19 (step S1).
  • control device 21 accurately performs water supply to washing tub 3 up to a predetermined amount of water (for example, a reference water level) according to detection information of washing water level detecting device 20a (step S2).
  • control device 21 operates washing pump 5 for a predetermined time (step S3). Thereafter, electricity is supplied to water supply valve 15 for a predetermined time to add make-up water into washing tub 3 (step S4). Thus, the amount of the washing water in washing tub 3 is adjusted to a necessary and sufficient amount of water for washing.
  • control device 21 supplies electricity to washing pump 5 and heater 8 (step S5) to turn them on.
  • washing water is sprayed from washing nozzle 6 while dissolving a detergent that is inserted in advance in washing tub 3 to wash washing object 7.
  • control device 21 performs water supply so that the water level becomes a water level lower than the water level of the standard course (step S2).
  • control device 21 operates washing pump 5 once for a predetermined time (step S3).
  • a washing step of spraying the washing water from washing nozzle 6 while dissolving the detergent inserted in washing tub 3 in advance to wash washing obj ect 7 is performed.
  • the concentration of the detergent in the washing water increases even though the same rated amount of detergent is inserted.
  • control device 21 supplies electricity to water supply valve 15 for a predetermined time to add make-up water into washing tub 3 (step S4).
  • the amount of washing water in washing tub 3 is adjusted to a necessary and sufficient amount of water in a main washing operation.
  • control device 21 supplies electricity to washing pump 5 and heater 8 (step S5) to turn them on.
  • washing pump 5 and heater 8 step S5
  • the washing water is sprayed from washing nozzle 6 while dissolving the detergent inserted in advance in washing tub 3 to wash washing object 7.
  • steps S6 to S9 are executed to perform the washing step that is the main washing operation.
  • the washing step is finished, and a rinsing step, a drying step and the like that are the next steps executed.
  • the washing effect of the inserted detergent is gradually increased according to a temperature increase.
  • the maximum active temperature (optimum temperature) of ingredient enzyme included in the detergent used in the dishwasher is about 40°C to 60°C. That is, by setting the temperature of the washing water to 40°C to 60°C, it is possible to increase the activity of the enzyme of the detergent.
  • the temperature of the washing water supplied into washing tub 3 is about 20°C.
  • the detergency of the detergent at the start of the operation is suppressed, except for a case where water heated by a hot-water heater is supplied.
  • the concentration of the detergent in the washing water is high at the start of the operation, the detergency of the detergent is low compared with a case where the temperature of water is high. Further, even at the last half of the washing operation in which the temperature of the washing water increases due to heating of heater 8, the concentration of the detergent ingredient becomes noticeably thin due to make-up water supplied for a predetermined time or reaction with contaminant ingredients, which reduces the washing effect of the detergent. Thus, it is difficult to wash a washing object with the maximum washing effect.
  • a dishwasher including: a washing tub that includes a dish basket for accommodating a washing object and a water reserving section for reserving washing water in an inner bottom portion thereof; a washing nozzle that is provided in the washing tub to spray the washing water to the washing object; a heater that is provided in the water reserving section to heat the washing water; a water level detecting device that is provided to be connected to the washing tub to detect a level of the washing water; a washing pump that supplies the washing water to the washing nozzle through a drainage port provided in the water reserving section and circulates the washing water in the washing tub; a water supply valve that supplies water into the washing tub; and a control device that controls respective steps of washing, rinsing and drying.
  • the control device performs a control for opening the water supply valve to start water supply, closing the water supply valve to finish the water supply when the water level detecting device detects a predetermined water level, and heating the washing water by the heater before the washing pump is
  • Fig. 1 is a longitudinal sectional view of a dishwasher according to the first exemplary embodiment.
  • Fig. 2 is a plan view illustrating a configuration of an inner bottom portion of a washing tub of the dishwasher according to the first exemplary embodiment.
  • the built-in type dishwasher has a configuration in which at least washing tub 3, washing pump 5, washing nozzle 6, heater 8, kitchen waste collecting section 10, dish basket 13, detergent inserting section 14, control device 21 and the like are provided in main body 1.
  • Washing tub 3 includes water reserving section 4 in an inner bottom portion thereof, and kitchen waste collecting section 10 is provided on a drainage port side in the vicinity of the center of the inner bottom portion. Further, opening 2 through which washing object 7 is put in and out is provided in an upper portion of washing tub 3. Further, inside washing tub 3, dish basket 13 that sets washing object 7 such as a dish is disposed to be put in and out through opening 2. Dish basket 13 includes, for example, dish basket 13a that contains glass objects, dish basket 13b that contains dishes or bowls, dish basket 13c that contains long and narrow cutleries such as chopsticks or spoons, and the like.
  • opening 2 of washing tub 3 is closed by lid 11 when washing tub 3 is accommodated in main body 1, and is opened by pulling out washing tub 3 from main body 1.
  • lid 11 moves up and down by a door opening/closing mechanism (not shown) using a latch and link mechanism 12, and closes opening 2 when washing tub 3 is accommodated in main body 1.
  • lid 11 seals opening 2 of washing tub 3 in a watertight manner by being in contact with a seal member (not shown).
  • Washing nozzle 6 is provided in a lower portion in washing tub 3, and sprays washing water to washing object 7 set in dish basket 13 for washing.
  • Washing pump 5 is disposed in a lower portion outside the bottom portion of washing tub 3 to supply the washing water to washing nozzle 6 for ejection, to thereby circulate the washing water in washing tub 3.
  • washing pump 5 is configured to include a motor (not shown) that is rotatable forward or backward. Further, washing pump 5 performs an original operation of the washing pump (the circulating operation of the washing water) when rotated forward, and is operated as a drainage pump that discharges the washing water in washing tub 3 to the outside when rotated backward.
  • Heater 8 is provided in water reserving section 4 of the inner bottom portion of washing tub 3, and heats the washing water reserved in water reserving section 4 in washing tub 3. Further, the periphery of heater 8 is surrounded and protected by heater protecting component 9 made of, for example, stainless steel or the like so that even though small things such as chopsticks or spoons fall, the small things are not directly in contact with heater 8. Further, with this configuration, it is possible to prevent the kitchen waste from being caught.
  • detergent inserting section 14 is provided integrally with dish basket 13 that contains the above-mentioned small objects such as chopsticks, spoons or the like, for example, at a position above heater protecting component 9. Further, detergent inserting section 14 leads the inserted detergent to be above heater 8. To this end, detergent inserting section 14 is provided at a position above heater 8 on the side of front surface 3a of washing tub 3 that is an upper stream side of the flow of the washing water in the inner bottom portion of washing tub 3, instead of a position above heater 8 on the side of kitchen waste collecting section 10 that is the side of the drainage port.
  • the inner bottom portion of washing tub 3 has a conical shape, and the periphery of the inner bottom portion is higher.
  • the washing water flows from the periphery of the inner bottom portion of washing tub 3 to kitchen waste collecting section 10. That is, the peripheral side of the inner bottom portion of washing tub 3 corresponds to the upstream side of the flow of the washing water.
  • the inserted detergent it is possible to prevent the inserted detergent from being in contact with washing object 7 set in dish basket 13. Further, it is possible to guide the inserted detergent to a position close to the upstream side in the vicinity of heater 8 through detergent inserting section 14.
  • water reserving section 4 is provided in inner bottom portion of washing tub 3. Further, water reserving section 4 is disposed in a midway position of a path that connects heater 8 and washing pump 5 on the outside of washing tub 3. Further, kitchen waste collecting section 10 (drainage port) that includes a kitchen waste collecting filter (not shown) that collects kitchen waste washed off from washing object 7 and a loose drainage filter (not shown) is provided in water reserving section 4.
  • Water supply valve 15 is provided at a rear portion of main body 1. Further, when control device 21 operates water supply valve 15, tap-water or the like is supplied into washing tub 3 through a pipe as washing water.
  • Auxiliary water tub 16 is provided on a rear side surface in the vicinity of the bottom portion of washing tub 3, for example.
  • Water level detecting device 20 connected to a lower part of kitchen waste collecting section 10 (drainage port) through a pipe is provided in auxiliary water tub 16.
  • Water level detecting device 20 includes washing water level detecting device 20a and overflow water level detecting device 20b. Washing water level detecting device 20a detects that a reference amount of water is reserved in washing tub 3 as a predetermined detection water level (for example, reference water level). On the other hand, overflow water level detecting device 20b detects that there is a possibility of overflow in a case where the water level in washing tub 3 reaches a predetermined water level or higher.
  • a temperature detecting unit (not shown) is fixedly provided to the outside of the bottom portion of washing tub 3 to detect the temperature of the washing water in washing tub 3.
  • Control device 21 is provided in main body 1, and controls various electrical components such as washing pump 5, heater 8, water supply valve 15 and an air blowing fan 17 to operate the dishwasher. Further, control device 21 controls the various electrical components on the basis of input information about on and off of electric power input from input device 19, course selection, operation start and the like, detection information from water level detecting device 20, the temperature detecting unit (not shown) or the like, and commands from a control program, to thereby execute respective steps of washing, rinsing and drying.
  • various electrical components such as washing pump 5, heater 8, water supply valve 15 and an air blowing fan 17 to operate the dishwasher. Further, control device 21 controls the various electrical components on the basis of input information about on and off of electric power input from input device 19, course selection, operation start and the like, detection information from water level detecting device 20, the temperature detecting unit (not shown) or the like, and commands from a control program, to thereby execute respective steps of washing, rinsing and drying.
  • the dishwasher of the present exemplary embodiment is configured.
  • Fig. 3 is a flowchart illustrating an operation of a washing step of the dishwasher according to the present exemplary embodiment.
  • Fig. 4A is a diagram illustrating a control sequence of a washing step of a dishwasher in the related art.
  • Fig. 4B is a diagram illustrating a control sequence of the washing step of the dishwasher according to the present exemplary embodiment.
  • control device 21 controls various electrical components according to commands from the control program.
  • control device 21 controls the operation of the dishwasher during washing.
  • a user sets washing object 7 such as dishes in dish basket 13 before operation for the operation start of the dishwasher. Further, the user inserts a detergent to above heater 8 on the side of front surface 3a of washing tub 3 through detergent inserting section 14 shown in Figs. 1 and 2 .
  • control device 21 starts the washing operation of the dishwasher on the basis of an input by the user through input device 19 (step S1).
  • control device 21 operates washing pump 5 to discharge the washing water in washing tub 3, thereby making washing tub 3 enter a non-water state.
  • washing pump 5 is operated as a drainage pump.
  • water supply valve 15 is operated to perform water supply up to a predetermined water level in washing tub 3 until washing water level detecting device 20a provided in water level detecting device 20 is operated by detecting the washing water from the non-water state (step S2).
  • control device 21 finishes the water supply (main water supply) is finished on the basis of the detection information.
  • the detection water level that is the reference water level of the washing water in washing tub 3 is set to be lower than the water level of the washing water in the main washing operation of the washing step to be performed later.
  • control device 21 supplies electricity to heater 8 to turn on, and operates heater 8 for a predetermined time (step S3).
  • control device 21 does not operate washing pump 5.
  • the temperature of the washing water accumulated in washing tub 3 increases. Further, according to the temperature increase of the washing water, dissolution of the detergent inserted through detergent inserting section 14 to the upstream side of the flow of the washing water above heater 8 is facilitated.
  • step S4 it is determined whether the temperature of the washing water is increased to a predetermined temperature (for example, 40°C to 60°C) or higher within a predetermined time (step S4). If the temperature of the washing water does not reach the predetermined temperature (No in step S4), the electricity supply to heater 8 is continued until the temperature of the washing water becomes the predetermined temperature.
  • a predetermined temperature for example, 40°C to 60°C
  • the electricity supply to heater 8 is continued until the temperature of the washing water becomes the predetermined temperature.
  • This operation is performed particularly considering that the maximum active temperature (optimum temperature) of ingredient enzyme included in the detergent used in the dishwasher is about 40°C to 60°C. That is, by setting the temperature of the washing water to 40°C to 60°C, it is possible to increase the activity of the enzyme of the detergent, and to effectively wash dirt attached to the dishes that can be decomposed by the enzyme.
  • control device 21 turns off heater 8 to finish the heating of the washing water, and operates washing pump 5 by an intermittent operation under the condition of ON for 5 seconds and OFF for 5 seconds, for example, to perform a prewashing (step S5).
  • washing pump 5 sprays the washing water with the detergent of high concentration and with high temperature to washing object 7 or the like.
  • washing pump 5 is not necessarily operated by the intermittent operation, but may be operated by a continuous operation.
  • control device 21 operates washing pump 5 for a predetermined time. Then, make-up water is added to washing tub 3 by supplying electricity to water supply valve 15 for a predetermined time, similarly to the related art (step S6). Thus, the amount of water in washing tub 3 is adjusted to a necessary and sufficient amount of water in the main washing operation of the washing step.
  • step S12 the procedure goes to the rinsing step that is the next step.
  • the operation of the washing step of the dishwasher of the present exemplary embodiment is executed.
  • washing step even though the temperature of the washing water supplied in washing tub 3 is low, by heating the washing water by heater 8 in advance without operation of washing pump 5, it is possible to sufficiently dissolve the inserted detergent into the washing water. Thus, it is possible to spray the washing water with high concentration and high temperature from washing nozzle 6 from the start of the washing operation to wash washing object 7.
  • the inserted detergent is sufficiently dissolved in the small amount of washing water in washing tub 3 before the make-up water is added thereto. Consequently, it is possible to perform washing with the washing water with high concentration and high temperature from the start of the washing operation.
  • detergent inserting section 14 is disposed to guide the detergent in the vicinity of heater 8. Specifically, detergent inserting section 14 is disposed at the position where the detergent can be inserted above heater 8 of the upstream portion of the flow of the washing water in the inner bottom portion of washing tub 3, on the opposite side to the drainage output (kitchen waste collecting section 10). With such a configuration, the washing water passes through the vicinity of heater 8, in a high temperature state due to heating, according to the operation of washing pump 5. Accordingly, the dissolution of the detergent is further facilitated. Thus, it is possible to sufficiently dissolve the inserted detergent in the small amount of washing water in washing tub 3 before the make-up water is added thereto. Consequently, it is possible to spray the washing water with high concentration and high temperature from washing nozzle 6 to wash washing object 7 from the start of the washing operation.
  • heater 8, kitchen waste collecting section 10 (drainage port) and detergent inserting section 14 are disposed so that the inserted detergent is guided in the vicinity of heater 8 and in a water path that connects heater 8 and kitchen waste collecting section 10 (drainage port). That is, the water path is disposed so that the inserted detergent flows in the inner bottom portion of washing tub 3 along the flow of the washing water when washing pump 5 is operated.
  • the dishwasher of the present exemplary embodiment it is possible to obtain the washing water with high detergent concentration and high temperature by heating the small amount of washing water at an appropriate temperature before washing pump 5 is operated. Further, it is possible to spray the pure washing water with high detergent concentration and high temperature to washing object 7 such as dishes for a predetermined time before being mixed with the washing water contaminated by washing of the washing object. Thus, it is possible to realize a dishwasher with a higher washing effect than the dishwasher in the related art with the same detergent amount (or with the same water amount).
  • a configuration of a dishwasher according to a second exemplary embodiment of the present invention will be described with reference to Figs. 5 to 8 . More specifically, a configuration of a tabletop dishwasher will be described as an example.
  • Fig. 5 is a side sectional view of the dishwasher according to the second exemplary embodiment of the present invention.
  • Fig. 6 is a front sectional view of the dishwasher according to the second exemplary embodiment.
  • Fig. 7 is a front sectional view of a main part of an inner bottom portion of a washing tub of the dishwasher according to the second exemplary embodiment.
  • Fig. 8 is a plan view of the main part of the dishwasher according to the second exemplary embodiment.
  • the tabletop dishwasher of the present exemplary embodiment has a configuration in which at least washing tub 31, washing pump 36, washing nozzle 35, temperature detecting unit 38, heater 37, kitchen waste collecting section 41, dish basket 32, detergent inserting section 48, control device 45 and the like are provided in main body 30.
  • Washing tub 31 accommodates washing object 46 such as dishes inside main body 30 of the dishwasher. Further, inside washing tub 31, dish basket 32 that sets washing object 46 is disposed to be put in or out through opening 33. Further, opening 33 of washing tub 31 is closed or opened by door 34. Washing nozzle 35 is provided in a lower portion in washing tub 31, and sprays washing water to washing object 46 set in washing basket 32 for washing. Washing pump 36 is disposed on the outside of a rear lower portion of washing tub 31 to send the washing water in washing tub 31 to washing nozzle 35 by pressure. Heater 37 is provided in washing tub 31 and heats the washing water.
  • Temperature detecting unit 38 is configured by a thermistor or the like, and is provided on the outside of the lower portion of washing tub 31 to detect the temperature of the washing water.
  • detergent inserting section 48 is provided integrally with dish basket 32, for example, at a position above detergent receiving section 47 (to be described later). Further, detergent inserting section 48 leads the inserted detergent to be above detergent receiving section 47.
  • Water reserving section 31a is provided in the inner bottom portion of washing tub 31.
  • Kitchen waste collecting section 41 drainage port
  • a kitchen waste collecting filter that collects kitchen waste washed off from washing object 46 is provided in water reserving unit 31a.
  • Water supply valve 42 is provided at a rear portion of main body 30 of the dishwasher. Further, when control device 45 operates water supply valve 42, tap-water or the like is supplied into washing tub 31 through a pipe as washing water.
  • auxiliary water tub 43 is provided on a lower right side of washing tub 31, for example.
  • Water level detecting device 44 connected to a lower part of kitchen waste collecting section 41 through a pipe is provided in auxiliary water tub 43.
  • Water level detecting device 44 detects that a reference amount of water is reserved in washing tub 31 as a predetermined detection water level (for example, reference water level).
  • Control device 45 is provided below door 34.
  • Control device 45 controls washing nozzle 35, washing pump 36, heater 37 and the like on the basis of detection information of temperature detecting unit 38 and input information input by a user through an input unit (not shown), according to a program that stores a control sequence. Thus, for example, respective steps of washing, rinsing, rinsing with heat, drying and the like are performed.
  • fan case 40 includes detergent receiving section 47. Further, detergent receiving section 47 receives detergent S inserted through detergent inserting section 48 provided in dish basket 32.
  • detergent receiving section 47 is provide position that is higher than heater 37 and at a position that is lower than a predetermined detection water level (for example, reference water level).
  • detergent receiving section 47 includes retaining section 47a, standing section 47b, flowing water section 47c, water passing section 47d and the like. Further, in detergent receiving section 47, as shown in Fig. 8 , retaining section 47a and flowing water section 47c are disposed in an approximately L shape (including an L shape) in a plan view.
  • Retaining section 47a of detergent receiving section 47 is provided under detergent inserting section 48, and receives and retains detergent S inserted from detergent inserting section 48.
  • Standing section 47b of detergent receiving section 47 is provided around retaining section 47a, and prevents detergent S from overflowing to the periphery thereof.
  • flowing water section 47c of detergent receiving section 47 is provided at a position above heater 37, deviated from a lower portion of detergent inserting section 48 without formation of standing section 47b.
  • the heated washing water may smoothly flow into and out of detergent receiving section 47, and may dissolve detergent S to obtain a liquid detergent, and may cause the liquid detergent to easily flow out.
  • Water passing section 47d of detergent receiving section 47 is provided at a position lower than flowing water section 47c, at the position of retaining section 47a of detergent receiving section 47.
  • the washing water and the liquid detergent may easily flow in and out through passing water section 47d, similarly to flowing water section 47c.
  • detergent receiving section 47 have a configuration in which the washing water may smoothly flow in and out as much as possible.
  • a plurality of portions for inflow and outflow such as flowing water section 47c and water passing section 47d of detergent receiving section 47 may be provided.
  • the heights of flowing water section 47c and water passing section 47d be different from each other. Accordingly, it is possible to convect the washing water, the liquid detergent or the like between detergent receiving section 47 and the outside for effective use. Consequently, it is possible to facilitate dissolution of the detergent.
  • standing section 47b of detergent receiving section 47 is not necessarily vertically provided, and it is sufficient as long as retaining section 47a is formed so that inserted detergent S does not overflow. Further, upper end 47b1 of standing section 47b may be provided at a position higher than the predetermined detection water level (for example, reference water level).
  • the dishwasher of the present exemplary embodiment is formed.
  • control device 45 controls various electrical components according to commands from the control program.
  • control device 45 controls the operation during washing of the dishwasher.
  • a user sets a washing object such as dishes in dish basket 32 before the start of the operation of the dishwasher. Further, the user inserts a detergent to detergent receiving section 47 from detergent inserting section 48 shown in Figs. 5 and 6 .
  • control device 45 starts the washing operation of the dishwasher on the basis of an input by the user through an input device (not shown) (step S1).
  • control device 45 operates washing pump 36, to discharge the washing water in washing tub 31, thereby making washing tub 3 enter a non-water state.
  • washing pump 36 is operated as a drainage pump.
  • water supply valve 42 is operated to perform water supply up to a predetermined water level in washing tub 31 until water level detecting device 44 is operated by detecting the washing water from the non-water state (step S2).
  • control device 45 finishes, when water level detecting device 44 detects a detection water level that is a reference water level, water supply (main water supply) is finished on the basis of the detection information.
  • the detection water level that is the reference water level of the washing water in washing tub 31 is set to be lower than the water level of the washing water in a main washing operation of the washing step to be executed later.
  • control device 45 supplies electricity to heater 37 to turn on, and operates heater 37 for a predetermined time (step S3).
  • control device 45 does not operate washing pump 36.
  • the temperature of the washing water accumulated in washing tub 31 increases.
  • the detergent is set in advance in detergent receiving section 47 before operation.
  • detergent receiving section 47 is provided at the position above heater 37 and at the position lower than the detection water level (for example, reference water level) of the washing water.
  • the detection water level for example, reference water level
  • the detergent inserted in detergent receiving section 47 is exposed to the washing water with high temperature in convection.
  • dissolution of the detergent retained in detergent receiving section 47 on the upstream side of the flow of the washing water above heater 37 is facilitated. Consequently, it is possible to obtain a liquid detergent with high temperature and high concentration as the washing water in a short time.
  • step S4 it is determined whether the temperature of the washing water is increased to a predetermined temperature (for example, 40°C to 60°C) or higher within a predetermined time (step S4). If the temperature of the washing water does not reach the predetermined temperature (No in step S4), the electricity supplied to heater 37 is continued until the temperature of the washing water becomes the predetermined temperature (step S4).
  • a predetermined temperature for example, 40°C to 60°C
  • control device 45 turns off heater 37 to finish the heating of the washing water, and operates washing pump 36 by an intermittent operation under the condition of ON for 5 seconds and OFF for 5 seconds, for example, to perform prewashing (step S5).
  • washing pump 36 sprays the washing water with the detergent of high concentration and with high temperature to washing object 46 or the like.
  • washing pump 36 is not necessarily operated by the intermittent operation, but may be operated by a continuous operation.
  • control device 45 operates washing pump 36 for a predetermined time. Then, make-up water is added to washing tub 31 by supplying electricity to water supply valve 15 for a predetermined time, similarly to the related art (step S6). Thus, the amount of water in washing tub 31 is adjusted to a necessary and sufficient amount of water in the main washing operation of the washing step.
  • step S12 the procedure goes to the rinsing step that is the next step.
  • the washing step of the dishwasher of the present exemplary embodiment is executed.
  • washing step even though the temperature of the washing water supplied in washing tub 31 is low, by heating the washing water by heater 37 in advance without operation of washing pump 36, it is possible to sufficiently dissolve the inserted detergent into the washing water. Thus, it is possible to spray the washing water with high concentration and high temperature from washing nozzle 35 from the start of the washing operation to wash washing object 46.
  • the inserted detergent is sufficiently dissolved in the small amount of washing water in washing tub 31 before the make-up water is added thereto. Consequently, it is possible to perform washing with the washing water with high concentration and high temperature from the start of the washing operation.
  • detergent receiving section 47 that holds the detergent is disposed in the vicinity of heater 37.
  • detergent receiving section 47 is disposed on the upstream side of the flow of washing water from heater 37, particularly, on the opposite side to kitchen waste collecting section 41.
  • the washing water passes through the periphery of heater 37 in a high temperature state due to heating according to the operation of washing pump 36.
  • the dissolution of the detergent is further facilitated.
  • detergent receiving section 47 is provided with a slope from fan case 40 when the washing water is sprayed.
  • a slope from fan case 40 when the washing water is sprayed.
  • the amount of detergent is larger than a specified value, or in a case where the dissolution condition of the detergent is poor, for example, in the case of a detergent that is barely dissolved, it is possible to efficiently dissolve the detergent by an agitating effect or the like due to the washing water that flows into detergent receiving section 47 through the slope, to thereby improve washing performance.
  • washing water with high concentration and high temperature. Further, it is possible to spray pure washing water with high concentration and high temperature before being mixed with contaminated washing water due to washing of the washing object to washing object 46 such as dishes for a predetermined time.
  • a dishwasher having an excellent washing effect compared with the dishwasher in the related art with the same amount of detergent (or with the same amount of water).
  • a configuration may be used in which a detection water level before the addition of the make-up water described in the present exemplary embodiment is used as a first washing detection water level, and a second washing detection water level, a third washing detection water level and the like are separately provided to detect the water level of the washing water.
  • the amount of the inserted detergent is uniform over the entirety of the washing steps.
  • the detergent inserting section may be provided at any arbitrary place as long as the place that guides the detergent to the upstream side of the flow of the washing water from the heater in the vicinity of the heater.
  • the dishwasher includes: a washing tub that includes a dish basket for accommodating a washing object and a water reserving section for reserving washing water in an inner bottom portion thereof; a washing nozzle that is provided in the washing tub to spray the washing water to the washing obj ect; a heater that is provided in the water reserving section to heat the washing water; a water level detecting device that is provided to be connected to the washing tub to detect a level of the washing water; a washing pump that supplies the washing water to the washing nozzle through a drainage port provided in the water reserving section and circulates the washing water in the washing tub; a water supply valve that supplies water into the washing tub; and a control device that controls respective steps of washing, rinsing and drying. Further, the control device may perform a control for opening the water supply valve to start water supply, closing the water supply valve to finish the water supply when the water level detecting device detects a predetermined water level, and heating the washing
  • control device may stop the water supply valve at a detection water level lower than a water level in the main washing operation, and may perform an operation of heating the washing water by the heater before the washing pump is operated.
  • control device may operate the heater for a predetermined time so that the temperature of the washing water heated by the heater is 40°C to 60°C.
  • control device may perform a control so that the washing pump is not operated until the washing water is heated by the heater to reach a predetermined temperature.
  • the dishwasher may further include a detergent inserting section that is provided in the washing tub to guide an inserted detergent in the vicinity of the heater.
  • the detergent inserting section may be provided to guide the detergent to a front surface side on an upstream side in the washing tub, above the heater, in the vicinity of the heater.
  • the detergent inserting section may be provided in the dish basket.
  • the washing tub may further include a detergent receiving section that guides the detergent, and the detergent receiving section may be provided at a position that is higher than the heater and is lower than the predetermined detection water level.
  • the washing tub may be configured to guide an inserted detergent in the vicinity of the heater and in a water path that connects the heater and the drainage port.
EP13190311.4A 2012-11-01 2013-10-25 Geschirrspüler Withdrawn EP2727511A3 (de)

Applications Claiming Priority (2)

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JP2012241563 2012-11-01
JP2013163015A JP2014110885A (ja) 2012-11-01 2013-08-06 食器洗い機

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EP2727511A3 EP2727511A3 (de) 2017-07-26

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CA2951409C (en) * 2014-08-22 2018-04-10 Lg Electronics Inc. Pump and dishwasher including the same
CN105411498B (zh) * 2015-11-03 2018-07-13 佛山市顺德区美的洗涤电器制造有限公司 洗碗机以及洗碗机的洗涤控制方法和装置
KR102443320B1 (ko) 2016-01-05 2022-09-15 엘지전자 주식회사 식기 세척기 및 식기 세척기의 제어방법
CN107212837B (zh) * 2017-07-13 2020-12-04 佛山市顺德区美的洗涤电器制造有限公司 洗碗机的加热控制方法和装置
JP6906142B2 (ja) * 2017-10-27 2021-07-21 パナソニックＩｐマネジメント株式会社 食器洗い機
CN109820463B (zh) * 2019-03-28 2021-07-06 佛山市百斯特电器科技有限公司 一种进水控制方法及洗碗机
CN113598684B (zh) * 2021-08-29 2022-08-19 嵊州市浙江工业大学创新研究院 一种预溶解洗碗粉的洗碗机

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EP2727511A3 (de) 2017-07-26
TWI581745B (zh) 2017-05-11
TW201438654A (zh) 2014-10-16
JP2014110885A (ja) 2014-06-19

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