JP2009183378A - dishwasher - Google Patents

Abstract

Disclosed is a dishwasher capable of quickly and surely reducing the concentration of detergent and dirt in washing water, further reducing the amount of water used in a rinsing process, and realizing a high water-saving effect.
A rotating cleaning nozzle 9 is provided in a cleaning tank 5 for storing an object 6 to be cleaned, and sprays cleaning water onto the object 6 to be cleaned, and a drain port 14 is formed on the bottom 5a of the cleaning tank 5 with the cleaning water. A cleaning / drainage pump 8 for sending the water to the rotary cleaning nozzle 9 and draining the cleaning tank 5, a water supply means 11 for supplying water to the cleaning tank 5, and a control means 15 for controlling the cleaning process and the rinsing process. And the control means 15 controls to supply a first water supply amount smaller than the water supply amount at the time of cleaning and rinsing after the drainage in the cleaning process or the rinsing process, and then to execute a residual water dilution process to be drained thereafter. Thus, it is possible to quickly and surely reduce the concentration of detergent and dirt in the washing water, and further reduce the amount of water used during the rinsing process, thereby realizing a high water-saving effect.
[Selection] Figure 1

Description

  The present invention relates to a dishwasher that uses a cleaning means such as a cleaning nozzle to inject cleaning water toward an object to be cleaned to clean the object to be cleaned.

  Conventionally, this type of dishwasher has been configured as shown in FIG. 3 (see, for example, Patent Document 1). Hereinafter, the configuration will be described.

  As shown in FIG. 3, the dishwasher main body 100 is provided with a washing tank 101 therein, and drives a water supply valve (not shown) to supply washing water into the washing tank 101. The cleaning / drainage pump 102 is for discharging cleaning water from the cleaning nozzle 103, and cleans the tableware 105, which is an object to be cleaned, placed in the tableware basket 104 and stored in the cleaning tank 101. In addition, a heater (not shown) for heating the cleaning water in the cleaning tank 101 is provided on the bottom surface of the cleaning tank 101, and the temperature of the cleaning water in the cleaning tank 101 is detected at the bottom of the cleaning tank 101. A temperature detecting means (not shown) is provided. The cleaning / drainage pump 102 is provided to discharge the cleaning water out of the cleaning tank 101. The operation unit is provided with control means 106 for sequentially controlling a series of steps of washing, rinsing and drying steps.

  The operation of the conventional dishwasher configured as described above will be described with reference to FIG.

In FIG. 4, when the tableware 105 is placed in the tableware basket 104, stored in the washing tub 101, and the operation is started after putting the detergent, the control means 106 operates the washing / drainage pump 102 to the drainage side. After the residual water in the cleaning tank 101 is discharged outside the apparatus, the water supply valve is driven into the cleaning tank 101 to supply water to a predetermined water level. Next, the cleaning / drainage pump 102 and the heater are energized, and the cleaning water is heated from the cleaning nozzle 103 toward the tableware 105 while heating the cleaning water. When the predetermined temperature is reached or a predetermined time elapses, the control means 106 stops energization of the cleaning / drainage pump 102 and the heater, operates the cleaning / drainage pump 102 to the drain side, and the cleaning water in the cleaning tank 101. Is discharged outside the machine, and the washing of the dishes is completed.
JP 2001-61756 A

  However, in such a conventional dishwasher, even if the washing / drainage pump 102 is driven and drainage is performed after each rinse in the washing process and the rinsing process, some washing water remains without being drained. Since the water remained as water and was then supplied as it was, there was a problem that the water after the water supply was contaminated by the residual water and the efficiency of rinsing was poor.

  The present invention solves the above-described conventional problems, and quickly and surely reduces the concentration of detergent and dirt in the wash water, and further reduces the amount of water used in the rinsing process, thereby realizing a high water-saving effect. It aims to provide a dishwasher that can be used.

  In order to solve the above-described conventional problems, a dishwasher according to the present invention includes a washing tank that accommodates an object to be cleaned, a cleaning unit that is provided inside the cleaning tank and that sprays cleaning water on the object to be cleaned, A drain port formed at the bottom of the cleaning tank, a cleaning pump that sends cleaning water from the drain port to the cleaning means, a drain pump that drains cleaning water out of the cleaning tank, and a water supply that supplies water to the cleaning tank And a control means for controlling the cleaning process and the rinsing process, the control means having a first water supply less than the amount of water supplied during the cleaning and rinsing after draining in the cleaning process or the rinsing process The drainage pump and the water supply means are controlled so as to perform a residual water dilution process for supplying water and then draining, and the concentration of detergent and dirt in the wash water can be reduced quickly and reliably. , Reduce the amount of water used in the rinsing step, it is possible to realize a high water saving effect.

  According to the dishwasher of the present invention, the concentration of detergent and dirt in the wash water can be quickly and reliably reduced, and the amount of water used in the rinsing process can be reduced to achieve a high water-saving effect. .

  1st invention is the washing tank which accommodates to-be-washed | cleaned object, the washing | cleaning means which is provided in the inside of the said washing tank, and injects washing water to the said to-be-washed object, The drain outlet formed in the bottom part of the said washing tank, A cleaning pump that sends cleaning water from the drain port to the cleaning means, a drain pump that drains the cleaning water to the outside of the cleaning tank, a water supply means that supplies water to the cleaning tank, and a cleaning process and a rinsing process are controlled. Control means, and after the drainage in the washing process or the rinsing process, the control means supplies a first water supply amount smaller than the amount supplied in the washing and rinsing steps, and then dilutes residual water to be drained. The drain pump and the water supply means are controlled so as to carry out a stroke, so that the concentration of detergent and dirt in the wash water can be reduced quickly and reliably, and the amount of water used in the rinse stroke can be reduced. High It is possible to realize a water-saving effect.

  In the second aspect of the invention, in particular, the control means of the first aspect of the invention controls to perform the residual water dilution step a plurality of times after performing the cleaning step or the rinsing step, and after draining in the cleaning step or the rinsing step. Since the concentration of detergent and dirt in the remaining water can be further reduced, the amount of water supply in the rinsing process can be reduced.

  In the third invention, in particular, the rinsing process is performed a plurality of times in the rinsing process of the first or second invention, and the control means executes the residual water dilution process a plurality of times each time the cleaning process and each rinsing are performed. Since the effect of each rinsing is made more effective and the amount of water supply or the number of times of rinsing in rinsing can be reduced, water saving performance can be improved.

  The fourth invention, in particular, the drainage pump according to any one of the first to third inventions includes a motor, an impeller that rotates by driving the motor, and a container having the impeller inside. The water level in the container is made higher than that of the impeller by water supply of the first water supply amount, and the residual water dilution process is performed by supplying the minimum amount of water required to drive the drainage pump. Therefore, the amount of water used in the remaining water dilution process can be saved, and the time for supplying water can be shortened, so that the amount of electricity can be reduced.

  According to a fifth aspect of the present invention, the control means according to any one of the first to fourth aspects of the present invention is such that the drainage pump is stopped until the first water supply amount has been supplied. Since the water level in the space where the drainage pump is installed does not reach the level that drains, the problem that drainage does not occur even when the drainage pump is driven can be prevented. The effect can be improved.

  According to a sixth aspect of the present invention, the control means according to any one of the first to fifth aspects is configured to start driving the drainage pump after supplying the first water supply amount and a predetermined time has elapsed. The washing water moving from the inside to the drainage port can be surely drained and can be drained after dirt such as fine leftovers in the washing water moves to the drainage port.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. Note that the present invention is not limited to this embodiment.

(Embodiment 1)
FIG. 1 is a cross-sectional view of the dishwasher according to the first embodiment of the present invention, and FIG. 2 is a control diagram of a water supply valve and a washing / drainage pump of the dishwasher and a detailed control diagram of a dilution process.

  In FIG. 1, a dishwasher 1 according to the present embodiment is provided with a housing 3 having a first opening 2 at a front portion and a drawer 3 that can be pulled out from the housing 3, and a second opening 4 above. A washing tub 5 having a tub, a dish basket 7 placed in the washing tub 5 on which an object 6 to be cleaned such as tableware is placed, and the washing water is pressurized by driving in the washing direction and used for washing, or the direction of drainage A cleaning / drainage pump 8 that drains water by driving, and the cleaning water pressurized by the cleaning / drainage pump 8 is a rotary cleaning nozzle 9 whose center of rotation is located at the approximate center of the bottom 5a of the cleaning tank 5. To the object 6 to be cleaned.

  Instead of the cleaning / drainage pump 8, dedicated pumps can be used for cleaning and drainage. Thereby, the installation of piping and pumps for cleaning and the arrangement of piping and pumps for drainage can be optimally designed individually.

  A water supply means 11 having a water supply valve 10 for supplying water into the cleaning tank 5 is disposed, and a heater 12 is disposed below the rotary cleaning nozzle 9 as a heating means for heating the cleaning water. In order to detect the heating state by the heater 12, temperature detection means 13 for detecting the temperature of the cleaning tank 5 is attached to the bottom of the outer wall of the cleaning tank 5.

  Moreover, the drain port 14 is provided in the bottom part 5a of the washing tank 5, and wash water is drained out of the dishwasher 1 from the drain port 14 via a drain hose (not shown). Further, a control means 15 for controlling the cleaning process and the rinsing process including the rinsing A, the rinsing B, and the heating rinsing is provided at the front portion of the cleaning tank 5. In the operation of the dishwasher 1 in the present embodiment, the drying process is not essential.

  The washing / drainage pump 8 is composed of a motor (not shown), an impeller (not shown) that rotates by driving the motor, and a container (not shown) that has the impeller inside, and is driven by driving the motor. The impeller rotates in the cleaning direction to supply the cleaning water in the cleaning tank 5 to the rotary cleaning nozzle 9, and the impeller rotates in the draining direction to send the cleaning water to a drain hose (not shown), Wash water is drained.

  About the dishwasher comprised as mentioned above, the operation | movement and an effect | action are demonstrated below with reference to FIG.

  When the user places the object to be cleaned 6 on the dish basket 7, puts the detergent, and starts the operation of the dishwasher 1, the impeller of the washing / drainage pump 8 is first driven in the direction of drainage. Drain any remaining water in the container. Next, as shown in FIG. 2A, the water supply valve 10 is driven to supply several liters of water into the cleaning tank 5. The supplied water dissolves in the detergent and becomes washing water. When water is supplied for a predetermined time, the water supply valve 10 is stopped, and then the heater 12 is driven to heat the cleaning water and promote the dissolution of the detergent in the cleaning water. Next, when the cleaning / drainage pump 8 is driven in the cleaning direction, the pressurized cleaning water is supplied to the rotary cleaning nozzle 9, and the rotary cleaning nozzle 9 rotates and the cleaning water heated by the article 6 to be cleaned. To remove dirt adhering to the object 6 to be cleaned.

  In this embodiment, the rotary cleaning nozzle 9 is used as the cleaning unit. However, the present invention is not limited to this, and the cleaning unit is cleaned from an injection hole (not shown) provided on the inner wall of the cleaning tank 5. It may be a fixed nozzle or the like that sprays cleaning water on the object 6 for cleaning.

  In this cleaning process, when the preset minimum cleaning time has passed and the temperature detecting means 13 detects that the temperature of the outer wall of the cleaning tank 5 has reached about 55 to 65 ° C., the cleaning process is sufficiently performed. It is determined that the object 6 has been cleaned, the operation of the cleaning / drainage pump 8 and the heater 12 is stopped, and the cleaning process is terminated.

  Next, the drainage process starts, and the impeller of the cleaning / drainage pump 8 is driven in the direction of drainage to discharge the cleaning water in the container.

  When the drainage process ends, the residual water dilution process begins. As shown in FIG. 2B, in the residual water dilution process, first, the water supply valve 10 is driven by the first predetermined time t1 second, so that the rotation of the rotary cleaning nozzle 9 in the cleaning process and the rinsing process is performed. A first water supply amount that is smaller than the water supply amount used for injecting the cleaning water to the cleaning object 6 is supplied.

  Next, the water supply valve 10 is stopped, and after the second predetermined time t2 seconds, the cleaning / drainage pump 8 is driven in the direction of draining for the third predetermined time t3 seconds, thereby supplying the water supplied. After almost reaching the cleaning / drainage pump 8, drainage is performed. In the present embodiment, the third predetermined time t3 seconds is about 10 seconds. After draining for the third predetermined time t3 seconds, the second water supply starts after a fourth predetermined time t4 seconds, and the remaining water is diluted as in the first time.

  The greater the first water supply amount, the greater the effect of diluting the residual water by performing the residual water dilution process once. However, the water level in the container is higher than the impeller of the cleaning / drainage pump 8. If it is more than the amount of water supply required to become, it can be drained by the rotation of the impeller, and the remaining water can be diluted. Further, if the first water supply amount is larger than the water supply amount necessary for the container to be filled with the supplied water, the washing water can be efficiently pressurized by the rotation of the impeller, so that the water is smoothly drained. be able to.

  In the residual water dilution process, the control means 15 stops the cleaning / drainage pump 8 until the first amount of water supply is completed. Can be prevented. Specifically, when water is supplied while the cleaning / drainage pump 8 is driven, a part of the cleaning water is fed into the passage between the water supply / drainage pump 8 and the rotary cleaning nozzle 9, and the water level in the container is The water level that can be discharged cannot be reached, and the cleaning water cannot be discharged even if the cleaning / drainage pump 8 is driven. Therefore, if the cleaning / drainage pump 8 is stopped and water is supplied, the cleaning water is not sent to the passage between the cleaning / drainage pump 8 and the rotary cleaning nozzle 9, and the water level in the water supply / drainage pump 8 can be drained. Therefore, drainage can be carried out more reliably.

  Further, in the residual water dilution process, the water was supplied by setting the second predetermined time t2, which is the time from the stop of the water supply valve 10 to the driving of the cleaning / drainage pump 8, to about 2 to 7 seconds. A small amount of water gathers at the drain port 14 and dirt such as fine leftovers in the wash water collects at the drain port 14, so that the drainage of the wash water can be more effectively removed and drained by subsequent drainage. Can do.

  By performing this residual water dilution process a plurality of times, the concentration of residual water can be sufficiently diluted even if the amount of water supplied in one residual water dilution process is reduced, and the amount of water supplied in the subsequent normal rinsing process By reducing the number of times of rinsing, a high water-saving effect can be realized.

  Further, for example, if 0.5 to 0.6 liter of residual water remains, by performing the residual water dilution process for supplying 0.2 liter of water three times, the residual water 35 to 35 before the residual water dilution process is obtained. Since it can be diluted to a concentration of about 40%, the amount of water used for subsequent rinsing can be reduced, the concentration of detergent remaining in the article to be cleaned 6 can be further reduced, and the amount of leftovers can be reduced. it can.

  In addition, when the residual water dilution process is performed after the washing process and after each rinsing process, the number of times of rinsing can be reduced by one compared to the rinsing process without the residual water dilution process, including the heating rinse. By rinsing three times, it is possible to realize a dilution rate comparable to the detergent and dirt concentration dilution rates that have been achieved by four rinses so far.

  After the washing process, the rinsing process is started after performing the residual water dilution process a plurality of times. First, in the rinse A, several liters of water is supplied into the cleaning tank 5 by driving the water supply valve 10. Thereafter, the cleaning / drainage pump 8 is driven in the cleaning direction to inject cleaning water onto the object 6 to be cleaned and dilute cleaning water having a higher detergent concentration attached to the object 6 to be rinsed. . Next, after the cleaning / drainage pump 8 is driven in the cleaning direction for a predetermined time, the drainage is performed by driving in the draining direction.

  Next, similarly to after the cleaning process, the residual water dilution process is performed a plurality of times to reduce the concentration of dirt such as detergent and residual vegetables in the residual water. After performing the residual water dilution process a plurality of times, rinse B is performed in the same manner as the rinse A, and then the residual water dilution process is performed a plurality of times.

  Thereafter, a heat rinse, which is a third rinse, is performed. In the third rinsing, the water supply valve 10 is driven to supply water, and then the cleaning / drainage pump 8 and the heater 12 are driven to inject cleaning water having a temperature of about 65 to 80 ° C. to the object to be cleaned 6. In addition, the detergent, dirt, etc. adhering to the object 6 to be cleaned are more effectively removed. The heating rinse ends when the preset minimum time has elapsed and the temperature detecting means 13 detects that the bottom of the outer wall of the cleaning tank 5 has reached a predetermined temperature of about 60 to 70 ° C. .

  Next, if necessary, a drying process is performed, and the operation of the dishwasher 1 is completed.

  The dishwasher according to the present invention can achieve a water-saving effect by performing the residual water dilution step, and is therefore useful for a table-type or built-in type dishwasher.

Sectional drawing of the dishwasher in Embodiment 1 of this invention (A) Control diagram of water supply valve and washing / drainage pump of the dishwasher (b) Detailed control diagram of dilution process of the dishwasher Cross-sectional view of a conventional dishwasher Control diagram of water supply valve and washing / drainage pump of the dishwasher

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Case 5 Cleaning tank 5a Bottom part 6 To-be-washed object 7 Tableware basket 8 Washing | cleaning / drainage pump 9 Rotating washing nozzle (washing means)
DESCRIPTION OF SYMBOLS 10 Water supply valve 11 Water supply means 14 Drain port 15 Control means

Claims (6)

A cleaning tank for storing an object to be cleaned; a cleaning means provided inside the cleaning tank for injecting cleaning water to the object to be cleaned; a drain port formed at a bottom of the cleaning tank; A cleaning pump for sending the cleaning means from the mouth, a drainage pump for draining the cleaning water to the outside of the cleaning tank, a water supply means for supplying water to the cleaning tank, and a control means for controlling the cleaning process and the rinsing process, The control means, after draining in the cleaning process or the rinsing process, supplies a first water supply amount that is smaller than the amount supplied in the cleaning and rinsing, and then executes a residual water dilution process for draining. A dishwasher for controlling the drain pump and the water supply means. 2. The dishwasher according to claim 1, wherein the control means performs control such that the residual water dilution step is performed a plurality of times after the washing step or the rinsing step. The dishwasher according to claim 1 or 2, wherein the rinsing step performs rinsing a plurality of times, and the control means performs control so that the residual water dilution step is performed a plurality of times each time the washing step and each rinsing are performed. The drainage pump includes a motor, an impeller that is rotated by driving the motor, and a container that includes the impeller, and the water level in the container is determined by the supply of a first water supply amount. The dishwasher according to any one of claims 1 to 3, wherein the dishwasher is made higher. The dishwasher according to any one of claims 1 to 4, wherein the control means stops the drainage pump until the first water supply is completed. The dishwasher according to any one of claims 1 to 5, wherein the control means starts driving the drainage pump after supplying the first water supply amount and a predetermined time has elapsed.

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