JP2007325789A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that garbages accumulated at the bottom of a washing tub are not sufficiently collected in a garbage filter only by feeding water from a water feeding port, so that additional washing water is required for collecting the garbage in the garbage filter. <P>SOLUTION: The dishwasher has: the garbage filter 18 provided at a washing water reservation part 12; a rotary washing nozzle 5 which jets washing water toward an object to be washed; a pump 6a for sending the washing water to the nozzle 5 with pressure; a drain means which drains the washing water in the washing water reservation part 12; a water level detection means 10 which detects the water level of the washing water supplied into the washing tub 2; and a control means 28 which controls the pump 6a in a washing process, a rinsing process and a drain process. In the drain process after finishing the rinsing process, the control means 28 drains the washing water in the washing tub 2 from the upper end to the lower part of the filter 18 and thereafter, controls the pump 6a to operate intermittently for a prescribed period to jet the washing water intermittently from the nozzle 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dishwasher for cleaning by spraying washing water onto tableware stored in a washing tank. Specifically, the present invention relates to a dishwasher for washing away leftovers attached to the bottom of the washing tank.

  In a conventional dishwasher, a washing tank for storing dishes, a water supply valve for supplying washing water into the washing tank, a nozzle for injecting washing water into the dish, and a washing tank The cleaning water is supplied from the water supply port at the final stage of the rinsing process, and includes a pump for sending the cleaning water to the nozzle and injecting the cleaning water from the nozzle and a drain means for draining the cleaning water out of the cleaning tank. The idea of the technique of accumulating the leftovers collected at the bottom of the washing tank on the leftovers filter by draining the washing water at the same time while supplying water was known (Patent Document 1).

JP-A-7-213473

  However, in the conventional dishwasher, in order to accumulate the leftovers collected at the bottom of the washing tank in the leftover filter, the washing water is supplied in the latter half of the washing process and the rinsing process. New washing water was required to accumulate on the vegetable filter.

Furthermore, simply by supplying cleaning water from the water supply port, the cleaning water only hits a specific position of the cleaning tank, and it can be reliably accumulated in the leftover filter without leaving the leftovers remaining at the bottom of the cleaning tank. There was also a problem that it was not possible.

  The present invention has been made in view of the above problems, and in the process of reliably accumulating the leftovers collected in the bottom of the washing tank in the leftover filter, It aims at providing the dishwasher which does not need to perform water supply.

  In order to solve the above problems and achieve the above object, the first aspect of the present invention includes a cleaning tank for storing an object to be cleaned, and a concave cleaning formed in a part of the bottom of the cleaning tank. A water storage unit, a leftover filter provided in the cleaning water storage unit, a rotary cleaning nozzle that injects cleaning water stored in the cleaning water storage unit toward an object to be cleaned, and pumping cleaning water to the rotary cleaning nozzle A pump that communicates with the pump, a water inlet arranged below the wash water reservoir, a drain means for discharging the wash water from the wash water reservoir, and the level of the wash water supplied into the wash tank. Water level detecting means for detecting, and control means for controlling the pump in the cleaning process, rinsing process, and draining process, and the control means leaves the cleaning water in the cleaning tank in the draining process after the rinsing process is completed. After draining from the top of the vegetable filter to the lower position, Constant time, controls to operate the pump intermittently, it is characterized in that so as to inject intermittently the washing water from the rotary washing nozzle.

  According to this configuration, the remaining water is collected by spraying the cleaning water from the rotary cleaning nozzle in a state where the cleaning water in the cleaning tank is drained to a position below the upper end of the leftover filter. Therefore, the remaining vegetables collected at the bottom of the cleaning tank can be accumulated in the leftover filter without newly supplying cleaning water.

In addition, because the cleaning water in the cleaning tank is drained from the top of the left side filter to a position below the top of the left side filter, the leftovers collected at the bottom of the cleaning tank are accumulated in the left side filter. The accumulated leftovers do not adhere to the bottom of the washing tank again following the movement of the washing water stored in the bottom of the washing tank.

  In addition, since the cleaning water is intermittently ejected from the rotary cleaning nozzle, the ejected cleaning water becomes intermittent, so that the cleaning water becomes wavy. As a result, since the wavy washing water will intermittently collide with the leftovers collected at the bottom of the washing tank, the leftovers can be vibrated, and the leftovers can be efficiently peeled off. .

  As described above, according to the above configuration, it is possible to reliably accumulate the leftovers collected in the bottom of the washing tank in the leftover filter, and in the process of accumulating the leftovers in the leftover filter, It is possible to achieve an excellent effect from the viewpoint of saving water that there is no need to supply water.

  What concerns the 2nd aspect among this invention is the dishwasher which concerns on a 1st aspect, Comprising: The washing | cleaning water sprayed from a rotary washing nozzle is a control means in the drainage process after completion | finish of a rinse process, The pump is controlled so as not to hit an object to be cleaned contained in the cleaning tank.

  According to this configuration, since the pump is controlled so that the cleaning water sprayed from the rotary cleaning nozzle does not hit the cleaning object stored in the cleaning tank, it hits the cleaning object stored in the cleaning tank. As a result, the dropping position to the bottom of the washing tank becomes the same position, and there is no occurrence of a portion where the leftovers cannot be accumulated. Accordingly, the cleaning water can be sprayed evenly over a wide area of the bottom of the cleaning tank, and the leftovers accumulated in the wide area of the bottom of the cleaning tank can be reliably accumulated in the leftover filter.

  In addition, since it does not hit the object to be cleaned contained in the cleaning tank, the cleaning water sprayed from the rotary cleaning nozzle is not dispersed into small water particles, and the energy for stripping the leftovers is not weakened. Therefore, when the washing water sprayed from the rotary washing nozzle hits the leftovers collected at the bottom of the washing tank, the leftovers can be surely peeled off. Furthermore, since the washing water sprayed from the rotary washing nozzle is not dispersed by the object to be washed contained in the washing tank, even if there is a little washing water, the remaining vegetables collected at the bottom of the washing tank are washed away into the vegetable filter. Can do. In other words, since the energy transported by the cleaning water becomes large, it is possible to produce an effect that the leftovers can be surely accumulated in the leftover filter.

  According to a third aspect of the present invention, there is provided a dishwasher according to the first or second aspect, wherein the control means sets the operation time of the pump to 0.4 to 0.6 seconds and the rest time. Control is performed so that the pause and the operation are repeatedly executed for 0.4 to 0.6 seconds.

  According to this configuration, the operation time of the pump is set to 0.4 to 0.6 seconds, the pause time is set to 0.4 to 0.6 seconds, and the pause and the operation are continuously repeated in a short cycle. Therefore, when the pump after the stop time is driven again, it is possible to continuously obtain a high injection pressure generated at the initial stage of the pump drive, so that the rotation is carried out even though there is little cleaning water to be injected. A driving force sufficient to rotate the cleaning nozzle can be reliably obtained. In addition, since the operation time of the pump is relatively short, the cleaning water sprayed from the rotary cleaning nozzle does not hit the object to be cleaned accommodated in the cleaning tank. This has the same effect as the second aspect of the present invention.

  Further, since the cleaning water is continuously ejected from the rotary cleaning nozzle at intermittent intervals of a short cycle, the reaction force is intermittently generated in the rotary cleaning nozzle at relatively short intervals by the injection of the cleaning water. The vibration due to the reaction force generated intermittently at relatively short intervals resonates, so that even if each generated reaction force is a small reaction force, a large rotational driving force is applied to the rotary cleaning nozzle. Can be given. Thereby, even if it is injection of little washing water, a rotation washing nozzle can be rotated more reliably and quickly. Thus, since the rotary cleaning nozzle can be rotated reliably and quickly, the cleaning water can be sprayed evenly and quickly over a wide area of the bottom of the cleaning tank. It is possible to quickly and surely accumulate the leftovers collected in the area in the leftover filter.

According to a fourth aspect of the present invention, there is provided a dishwasher according to any one of the first to third aspects, wherein the water level detecting means can detect a low water level above the leftover filter. The control means is capable of intermittently operating the pump for a predetermined time after draining for a predetermined time after the low water level is detected by the water level detecting means in the draining process after the rinsing process is completed. And the cleaning water is intermittently ejected from the rotary cleaning nozzle.

  According to this configuration, draining is performed for a predetermined time after the low water level is detected by the water level detecting means, so that the cleaning water in the cleaning tank is drained to a position below the upper end of the leftover filter. Therefore, it is not necessary to separately provide a water level detecting means for detecting a state in which the cleaning water in the cleaning tank is drained from the upper end of the leftover filter to a position below, and the number of parts can be reduced. As a result, the structure of the dishwasher can be simplified, and the cost and size can be reduced.

According to a fifth aspect of the present invention, there is provided a dishwasher according to any one of the first to third aspects, wherein the water level detecting means includes a low water level above the leftover filter and a rotary cleaning nozzle. It is possible to detect a high water level at a lower part and a higher water level than a low water level, and the rinsing step has a first rinsing step and a final rinsing step independent of the first rinsing step, and the control means In the first rinsing process, the pump is controlled to operate intermittently at a low water level, and the cleaning water is intermittently injected from the rotary cleaning nozzle. In the final rinsing process, the pump is continuously operated at a high water level. The operation is controlled so that the water is continuously operated, and the washing water is continuously ejected from the rotary washing nozzle.

  According to this configuration, in the first rinsing process, the pump is controlled to be intermittently operated at a low water level, and the cleaning water is intermittently ejected from the rotary cleaning nozzle. A mass of washing water having high kinetic energy can be continuously supplied with a predetermined pause time. Thereby, the lump of washing water having relatively high kinetic energy can give a strong impact force to the leftovers attached to the tableware, and the leftovers attached to the tableware can be reliably washed. In the final rinsing process, the pump is controlled to operate continuously at a high water level, and the cleaning water is continuously injected from the rotary cleaning nozzle. The leftovers attached to the tableware can be surely washed away, and the leftovers in the washing tank can be accumulated in the leftover filter. Thereby, at the time of completion | finish of a rinse process, the leftovers adhering to the washing tank bottom part can be decreased.

  According to a sixth aspect of the present invention, there is provided a dishwasher according to the fifth aspect, wherein the leftover filter is detachably provided at the upper part of the washing water reservoir, and an opening is partly provided. It consists of a formed upper vegetable filter and a concave lower vegetable filter that is detachably provided in the opening. The upper vegetable filter is inclined downward from the periphery toward the opening, and is controlled. In the draining process after the rinsing process, the cleaning water in the cleaning tank is drained to a position below the upper end of the lower leftover filter, and then controlled to rotate the pump intermittently for a predetermined time. The cleaning water is intermittently ejected from the cleaning nozzle.

According to this configuration, in the draining process after the last rinsing process, the pump is intermittently operated for a predetermined time in a state where the cleaning water in the cleaning tank is drained to a position below the upper end of the lower leftover filter. Since the cleaning water is intermittently jetted from the rotary cleaning nozzle, the leftovers accumulated in the upper leftover filter can be reliably accumulated in the lower leftover filter. In particular, at the end of the final rinsing process of the fifth aspect, a large amount of leftovers in the washing tank are accumulated in the upper leftover filter, so that they are accumulated in the upper leftover filter with a relatively small amount of washing water. The leftovers can be accumulated in the lower leftover filter. Furthermore, if the leftovers accumulated in the upper leftover filter are accumulated in the lower leftover filter, only the lower leftover filter can be removed and the leftovers can be discarded. Efficiency is also improved.

  As described above, according to the dishwasher of the present invention, it is possible to sufficiently accumulate the leftovers collected in the bottom of the washing tank in the leftover filter, and in the step of collecting the leftovers in the leftover filter. Therefore, it is possible to reliably accumulate leftovers without the need for new water supply.

Hereinafter, an embodiment of the dishwasher of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an internal structure of a dishwasher in one embodiment of the present invention.

As shown in FIG. 1, the dishwasher 1 includes a main body case 20, a cleaning tank 2 provided therein, and a lid 3 for taking in and out the tableware. The cleaning tank 2 accommodates tableware (objects to be cleaned), and an opening 21 is formed on one end surface of the cleaning tank 2. The lid 3 is provided in the opening 21 so as to be freely opened and closed. By opening the lid 3, the user can put in and out the tableware in the cleaning tank 2.

Inside the washing tub 2 are provided a table basket 4 for storing tableware and a rotary cleaning nozzle 5 for spraying cleaning water toward the tableware. The rotary cleaning nozzle 5 is rotatably attached to the bottom of the cleaning tank 2 and has a large number of injection ports. Then, the cleaning water is jetted from the rotary cleaning nozzle 5 toward the tableware, whereby the tableware stored in the tableware basket 4 is cleaned. Details will be described later.

Further, the dishwasher 1 includes a water supply port 19 formed in the upper rear portion of the cleaning tank 2, a water supply valve 9 (water supply means) for supplying cleaning water into the cleaning tank 2, and a water amount detection sensor 10 ( Water quantity detection means). The water supply valve 9 is an electromagnetic valve, and cleaning water is supplied into the cleaning tank 2 by opening and closing the water supply valve 9. That is, when the water supply valve 9 is opened, cleaning water is supplied into the cleaning tank 2 from a supply source of cleaning water (for example, water supply, hot water supply device, etc.) through the water supply port 19.

The water amount detection sensor 10 detects the level of the cleaning water supplied into the cleaning tank 2, and a float switch is used in this embodiment. Specifically, the water amount detection sensor 10 includes a float case 22, a float 23 provided in the float case 22, and a water amount detection switch (not shown) that detects the vertical displacement of the float 23. Yes. When the water level of the cleaning water in the cleaning tank 2 becomes the lower point water level in the float case 22, the lower water level detection switch (not shown) is turned “ON” to detect the low water level in the cleaning tank 2. it can. When the water level in the cleaning tank 2 becomes the upper water level in the float case 22, the upper water amount detection switch (not shown) is turned “ON”, and the high water level in the cleaning tank 2 can be detected. Thus, by detecting the vertical displacement of the float 23, the low water level and the high water level in the cleaning tank 2 can be detected, and predetermined cleaning water can be stored in the cleaning tank 2.
In the present embodiment, a float switch is used as the water amount detection sensor 10, but the present invention is not limited to this, and a pressure switch may be used.

A washing water reservoir 12 is formed in the lower part of the washing tank 2, and is provided with a pump 6, a hot water heater 7, a hot water temperature sensor 8 (hot water temperature detection means), and a drain valve 31.

The cleaning water reservoir 12 is formed at the front bottom of the cleaning tank 2 and has a concave shape that is lower than the bottom surface of the cleaning tank 2. Then, the cleaning water that has dropped onto the bottom surface of the cleaning tank 2 flows into the cleaning water reservoir 12 and is stored in the cleaning water reservoir 12.

The hot water heater 7 is for heating the cleaning water and is provided in the cleaning water reservoir 12. The hot water temperature sensor 8 detects the temperature of the cleaning water stored in the cleaning water reservoir 12. As a result, the wash water stored in the wash water reservoir 12 is heated by the hot water heater 7, and the temperature of the wash water heated by the hot water heater 7 is detected by the hot water temperature sensor 8. Then, by feeding back the temperature detected by the hot water temperature sensor and further heating the wash water, the wash water stored in the wash water reservoir 12 can be brought to a predetermined temperature.

The pump 6 includes a cleaning pump 6a that pumps cleaning water stored in the cleaning water reservoir 12 to the rotary cleaning nozzle 5, and a drain pump 6b that pumps cleaning water in the cleaning tank 2 to a drain pipe described later. . Then, the cleaning water stored in the cleaning water reservoir 12 can be jetted from the rotary cleaning nozzle 5 toward the tableware by driving the cleaning pump 6a, and the cleaning water is driven by driving the drain pump 6b. The washing water stored in the water storage unit 12 can be drained outside the dishwasher 1. In the present embodiment, the cleaning pump 6a and the drainage pump 6b are provided as separate bodies. However, the present invention is not limited to this, and the cleaning pump 6a and the drainage pump 6b may be provided integrally. Moreover, it is good also as the pump 6 only with the washing pump 6a or the drainage pump 6b.

The drain valve 31 is an electromagnetic valve and is provided in a drain pipe described later. By opening the drain valve 31, the washing water stored in the washing tub 2 is discharged to the outside of the dishwasher 1. In the present embodiment, the drainage means is constituted by the drainage pump 6b and the drainage valve 31. However, the drainage means is not limited to this, and the drainage means may be constituted only by the drainage valve 31 that discharges the washing water of the washing water reservoir 12. Good.

Below the cleaning water reservoir 12, a water inlet 13 is formed. The water inlet 13 includes a cleaning pump water inlet 13a communicating with the cleaning pump 6a and a drain pump water inlet 13b communicating with the drain pump 6b. The cleaning pump 6 a is formed with a suction port 14 a for sucking the cleaning water in the cleaning water reservoir 12 and a discharge port 16 a for discharging the cleaning water to the rotary cleaning nozzle 5. Further, the drainage pump 6b is formed with a suction port 14b for sucking the cleaning water of the cleaning water reservoir 12 and a discharge port 16b for discharging the cleaning water to a drain pipe to be described later. In this embodiment, the water inlet 13 is composed of the washing pump water inlet 13a and the drain pump water inlet 13b provided separately from this, but the present invention is not limited to this, and the cleaning pump water inlet 13a and the drain pump inlet are provided. A water inlet that also serves as the water inlet 13b may be configured. Alternatively, only the cleaning pump water inlet 13a or the drain pump water inlet 13b may be used as the water inlet.

The cleaning pump water inlet 13a below the cleaning water reservoir 12 is connected to the suction port 14a of the cleaning pump 6a by a cleaning pump suction pipe 15a. Further, the discharge port 16 a of the cleaning pump 6 a is connected to the rotary cleaning nozzle 5 by a discharge pipe 17. As a result, the cleaning water stored in the cleaning water reservoir 12 is pumped to the rotary cleaning nozzle 5 by the driving force of the cleaning pump 6a.

Moreover, the drainage pump water inlet 13b below the washing water reservoir 12 is connected to the suction port 14b of the drainage pump 6b by a drainage pump suction pipe 15b. Further, the discharge port 16 b of the drain pump 6 b is connected to the drain pipe 24. Thereby, the wash water stored in the wash water reservoir 12 is drained outside the dishwasher 1 through the drain pipe 24 by the driving force of the drain pump 6b.

In the present embodiment, the cleaning pump 6a is provided with a cleaning pump drive motor (not shown), and the drainage pump 6b is provided with a drainage pump drive motor (not shown). However, the present invention is not limited to this, and when the cleaning pump 6a and the drainage pump 6b are integrally configured, the cleaning pump 6a and the drainage pump 6b may be driven by a single drive motor (not shown). In this case, the drainage pump 6b functions as a drive motor for the cleaning pump 6a by rotating the drive motor (not shown) in the forward direction (clockwise), and reversely (counterclockwise) in the reverse direction. It drives as a drive motor.

The washing water reservoir 12 is provided with a leftover filter 18. The leftover filter 18 includes an upper leftover filter 18a and a lower leftover filter 18b. This leftover filter 18 collects leftovers washed away from the dishes. Details will be described later with reference to FIG.

A blower fan 25, a warm air heater 26, and a warm air temperature sensor 29 are provided in the lower part of the dishwasher 1, and a lid open / close detection sensor 33 and an exhaust port 27 are provided in the upper part of the dishwasher 1, respectively. It has been.

The blower fan 25 sends air into the cleaning tank 2, and the hot air heater 26 heats the air sent by the blower fan 25. The temperature of the air heated by the hot air heater 26 is detected by the hot air temperature sensor 29, and the air sent into the washing tub 2 is discharged from the exhaust port 27 to the outside of the dishwasher 1. The lid opening / closing detection sensor 33 detects opening / closing of the lid 3, and the lid opening / closing detection sensor 33 can detect whether the lid 3 is opened or closed.

A control device 28 is provided at the front lower part of the dishwasher 1. The control device 28 controls the cleaning pump 6a and the drainage pump 6b. Furthermore, an operation panel 30 is formed at the front lower part of the dishwasher 1. The operation panel 30 includes switches (not shown) such as a power switch, a timer switch, a cleaning course setting switch, a water amount setting switch, and an operation start / stop switch.

  Next, the electrical configuration of the dishwasher of the present invention will be described with reference to FIG. FIG. 2 is a block diagram showing an electrical configuration of the dishwasher in one embodiment of the present invention.

As shown in FIG. 2, the dishwasher 1 includes a control device 28. The control device 28 includes a microcomputer including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an interface, and the like (all not shown). Programs for controlling the microcomputer are stored in storage means such as a RAM (not shown) and a ROM (not shown).

The control device 28 is supplied with output signals from the above-described water amount detection sensor 10, hot air temperature sensor 29, hot water temperature sensor 8, lid open / close detection sensor 33, and operation panel 30. Based on these output signals, the control device 28 controls the blower fan 25, the cleaning pump 6a, the drain pump 6b, the hot air heater 26, the hot water heater 7, the buzzer 32, the water supply valve 9, and the drain valve 31. It is like that.

For example, the buzzer 32 performs cleaning notification of the leftover filter 18 when it is determined that there is more than a predetermined amount of leftover stain on the leftover filter 18. And the user can clean the leftovers and dirt collected by the leftovers filter 18 by the notification of the buzzer 32. The notification sound of the buzzer 32 stops when the user opens the door 3 in order to clean the leftover filter 18. Specifically, when the door opening / closing detection sensor 33 detects that the door 3 has been opened, the control unit 28 stops the notification sound of the buzzer 32.

  Next, an outline of the accumulation of leftovers in the dishwasher of the present invention will be described with reference to FIG. Fig.3 (a) is the schematic when the inside of the dishwasher in one Embodiment of this invention is seen from upper part.

As shown in FIG. 3A, in the cleaning process and the rinsing process, the cleaning water is sprayed toward the tableware while the rotary cleaning nozzle 5 rotates, and the leftovers attached to the tableware are washed away. The leftovers washed away by the washing water are collected on the leftover filter 18, but some of the leftovers are not collected on the leftover filter 18 but are attached to the bottom of the washing tank 2. . FIG. 3A shows this state.

FIG.3 (b) is AA sectional drawing of Fig.3 (a). As shown in FIG. 3B, in the cleaning process, when the water supply valve 9 is opened and cleaning water is supplied into the cleaning tank 2, the cleaning water accumulates from the bottom of the cleaning water reservoir 12, and cleaning is performed. As the water level rises, the inside of the cleaning pump 6a is also filled with the cleaning water. Thereafter, the bottom portion of the washing tank 2 is submerged by the washing water, and when it is supplied to the vicinity of the middle portion of the root of the rotary washing nozzle 5 above the leftover filter 18, the water amount detection sensor 10 causes the water level to become high. It is detected. When the water level detection sensor 10 detects that the water level is high, the water supply valve 9 is closed by the control means 28, and the cleaning pump 6a is continuously operated as described later. Washing water is sprayed continuously, and the leftovers attached to the dishes are washed away. In this way, in the cleaning process, the cleaning pump 6a is controlled to operate continuously at a high water level, and the cleaning water is continuously injected from the rotary cleaning nozzle 5, so that a large amount is injected from the rotary cleaning nozzle 5. With this washing water, it is possible to reliably wash away the leftovers attached to the dishes.

Next, in the rinsing process (first rinsing process), as in the cleaning process, the cleaning water is supplied into the cleaning tank 2 and is supplied to the upper part (particularly “near the upper part”) from the leftover filter 18. The detection sensor 10 detects that the water level has become low. When the water level detection sensor 10 detects that the water level is low, the water supply valve 9 is closed by the control means 28, and the cleaning pump 6a is intermittently operated as described later. Washing water is sprayed intermittently, and the leftovers attached to the dishes are washed away. Thus, in the rinsing process (first rinsing process), the pump is controlled to operate intermittently at a low water level, and the cleaning water is intermittently injected from the rotary cleaning nozzle. The lump of washing water having a relatively high kinetic energy can give a strong impact force to the leftovers attached to the dishes, and the leftovers attached to the dishes can be reliably washed. Thereafter, a rinsing process is subsequently performed, and the rinsing process is completed when the last rinsing process is completed. The final rinsing process will be described later with reference to FIG.

Next, in the drainage process, the wastewater is drained from the leftover filter 18 to the remaining vegetable accumulation level in the initial drainage step of the drainage step described later. Then, in a state where the remaining vegetables are accumulated, the washing pump 6a is intermittently operated in the remaining vegetables accumulation process of the drainage process described later, and the washing water is intermittently jetted from the rotary washing nozzle 5 to perform washing. The leftovers attached to the bottom of the tank 2 are accumulated on the leftover filter 18. The drainage process will be described later with reference to FIG.

As described above, the leftover filter 18 includes the upper leftover filter 18a and the lower leftover filter 18b. And the upper leftover filter 18a is provided in the upper part of the wash water storage part 12 so that attachment or detachment is possible, and the opening part is formed in the one part. The opening is formed so as to incline downward from the peripheral part of the upper leftover filter 18a toward the opening. The opening is detachably provided with a concave lower leftover filter 18b. Thereby, only the lower leftover filter 18b can be removed, and the leftovers accumulated in the lower leftover filter 18b can be discarded.

Next, the operation contents from the final rinsing process of the rinsing process of the dishwasher of the present invention to the drainage process will be described in detail with reference to FIG. FIG. 4 is a diagram showing the operation contents from the final rinse process to the drainage process of the dishwasher in one embodiment of the present invention.

In the rinsing process (the last rinsing process), when the water supply valve 9 is opened and the cleaning water is supplied into the cleaning tank 2, the cleaning water accumulates from the bottom of the cleaning water reservoir 12, and the cleaning water level rises. The inside of the cleaning pump 6a is also filled with cleaning water. Thereafter, the bottom portion of the washing tank 2 is submerged by the washing water, and when it is supplied to the vicinity of the middle portion of the root of the rotary washing nozzle 5 above the leftover filter 18, the water amount detection sensor 10 causes the water level to become high. Is detected (see FIG. 3B). When the water level detection sensor 10 detects that the water level has become high, the water supply valve 9 is closed by the control means 28, and the cleaning pump 6a is continuously operated for 15 minutes. Washing water is sprayed onto the bottom of the cleaning tank 2 and leftovers attached to the tableware are collected in the leftover filter 18. Thus, in the final rinsing step, the cleaning pump 6a is controlled to continuously operate at a high water level, and the cleaning water is continuously injected from the rotary cleaning nozzle 5, so that it is injected from the rotary cleaning nozzle 5. With a large amount of washing water, it is possible to surely wash away the leftovers adhering to the dishes, and it is possible to accumulate the leftovers in the washing tank 2 in the leftover filter 18. And after the last rinse process is complete | finished, a drainage process is performed continuously.

In the drainage process, processing is performed in the order of the initial drainage process → the leftovers accumulation process → the final discharge process.
First, in the initial drainage process of the drainage process, the drain valve 31 is opened, and the wash water stored in the wash water reservoir 12 is drained outside the dishwasher 1 by the driving force of the drain pump 6b. At this time, not all of the cleaning water in the cleaning tank 2 is drained, but is drained to the level of the cleaning water when the residual vegetable accumulation is performed (the residual vegetable accumulation water level). Specifically, when the cleaning water in the cleaning tank 2 is drained and drained to a lower water level (see FIG. 3 (b)) above the lower leftover filter 18b, the water amount detection sensor 10 causes the cleaning water in the cleaning tank 2 to be drained. It is detected that the wash water has become low. Then, the drainage pump 6b is further driven for 5 seconds (predetermined time) after the water level detection sensor 10 detects that the water level has become low, so that the level of the cleaning water in the cleaning tank 2 is left over. Accumulated water level. In addition, this leftovers accumulation water level is a water level of the position below the leftovers filter 18 as mentioned above.

In this manner, drainage was performed for 5 seconds (predetermined time) after the low water level was detected by the water amount detection sensor 10, and the washing water in the washing tank 2 was drained to a position below the leftover filter 18. Therefore, it is not necessary to separately provide a water amount detection sensor for detecting a state in which the cleaning water in the cleaning tank 2 is drained to a position below the leftover filter 18, thereby reducing the number of parts. Therefore, the structure of the dishwasher 1 can be simplified, and the cost and size can be reduced. And when the initial drainage process of a drainage process is complete | finished, a leftovers accumulation process is performed.

In the waste vegetable accumulation process of the drainage process, the cleaning pump 6a is intermittently operated for 5 minutes, and the cleaning water is intermittently jetted from the rotary cleaning nozzle 5 and adheres to the bottom of the cleaning tank 2 and the upper residual vegetable filter 18a. The leftovers are accumulated in the lower leftover filter 18b. Thereby, since the washing water is sprayed from the rotary washing nozzle 5 in a state where the washing water in the washing tank 2 is drained to a position below the leftover filter 18, without newly supplying the washing water, The leftovers collected at the bottom of the washing tank 2 can be accumulated in the leftover filter 18. Then, when the leftover collection process ends, the final drainage process of the drainage process is performed.

In the final draining process of the draining process, the drain valve 31 is opened, the drain pump 6b is driven for 20 seconds, and the cleaning water in the cleaning tank 2 is drained outside the cleaning tank 2. Thereby, a drainage process is complete | finished.

Next, the operation of the cleaning pump in the leftover collection process will be described with reference to FIG. Fig.5 (a) is a figure which shows the driving | operation of the washing pump of the dishwasher in one Embodiment of this invention.

As shown in FIG. 5A, the cleaning pump 6a is intermittently operated in the leftover cleaning process. Specifically, in the leftover vegetable washing process, the washing pump 6a is stopped and operated (0.5 seconds), such as 0.5 second operation → 0.5 second pause → 0.5 second operation. (0.5 seconds) is repeated, and the cleaning pump 6a is intermittently operated. Thus, in the leftover vegetable accumulation step, the cleaning pump 6a is intermittently operated, and the cleaning water is intermittently ejected from the rotary cleaning nozzle 5, so that the intermittently ejected cleaning water becomes wavy, The wavy washing water intermittently hits the leftovers collected at the bottom of the washing tank 2, whereby the impact force can be transmitted to the leftovers in a vibrational manner, and the leftovers can be efficiently peeled off.

  Next, changes in pump pressure when a general cleaning pump operates from a resting state will be described. FIG.5 (b) is a figure which shows the change of a pressure when a common washing | cleaning pump operate | moves from a dormant state.

In FIG. 5B, the horizontal axis indicates time, and the vertical axis indicates the pump pressure of the cleaning pump. Specifically, the pump pressure indicates the pressure of the cleaning water at the discharge port of the cleaning pump. As shown in FIG. 5B, in a general cleaning pump, the pump pressure suddenly increases at the beginning of the operation of the cleaning pump, and after reaching the highest point, a substantially constant value (steady state) is obtained. To keep. The reason why the pump pressure rises above the steady state pump pressure after the operation of the cleaning pump is because the load on the cleaning pump is light immediately after the operation of the cleaning pump is started. In this embodiment, in order to use the high injection pressure at the beginning of the operation of the cleaning pump 6a, the operation time of the cleaning pump 6a is set to 0.5 seconds, the rest time is set to 0.5 seconds, and the cleaning pump 6a is intermittently operated. Driving.

As described above, the operation time of the cleaning pump 6a is set to 0.5 seconds and the stop time is set to 0.5 seconds. The stop and operation are repeatedly executed in a short cycle, so that the cleaning pump 6a after the stop time is driven again. In this case, since the high injection pressure generated at the initial stage of driving of the cleaning pump 6a can be obtained continuously, it is sufficient to rotate the rotary cleaning nozzle 5 in spite of the small amount of cleaning water being injected. Propulsive force can be obtained reliably.

In the present embodiment, the operation time of the cleaning pump 6a is set to 0.5 seconds, and the operation time of the cleaning pump 6a is not limited to this. The pause and operation may be repeated by setting the time to 0.4 to 0.6 seconds and the pause time to 0.4 to 0.6 seconds. Thus, even when the operation time of the cleaning pump 6a is set to 0.4 to 0.6 seconds and the pause time is set to 0.4 to 0.6 seconds, and the pause and the operation are repeatedly executed, from the steady state, A high pump pressure can be obtained (see FIG. 5B), and the same effect can be obtained as when the operation time of the cleaning pump 6a is 0.5 seconds and the rest time is 0.5 seconds.

  Next, the operation from the cleaning process to the drying process will be described with reference to FIG. FIG. 6 is a diagram showing the operation contents from the washing process to the drying process of the dishwasher in one embodiment of the present invention.

In the present embodiment, the washing process → the rinsing process 1 (the first rinsing process) → the rinsing process 2 → the rinsing process 3 (the last rinsing process) → the draining process (the initial draining process) → the draining process (the remaining vegetable accumulation process) → the draining The dishwasher 1 is operated in the order of process (final drainage process) → drying process. Here, the first rinsing step refers to the rinsing step performed first among the rinsing steps, and the last rinsing step refers to the rinsing step performed last among the rinsing steps. In the present embodiment, the rinsing process includes three independent rinsing processes, the rinsing process 1 is the first rinsing process, and the rinsing process 3 is the last rinsing process. In FIG. 6, for convenience of explanation, the cleaning process to the drying process are described, and the description of the process before the cleaning process and the process after the drying process shown in FIG. 6 is omitted.

In FIG. 6, it demonstrates from the state in which the washing water in the washing tank 2 became the high water level in the washing | cleaning process.
As shown in FIG. 6, in the cleaning process, the cleaning water in the cleaning water reservoir 12 is heated by the hot water heater 7 while the cleaning water level in the cleaning tank 2 is high, and the cleaning pump 6 a It is operated continuously. Thereby, the residual vegetables adhering to tableware can be reliably washed away by the large amount of high-temperature washing water sprayed from the rotary washing nozzle 5.

Thereafter, the operation of the cleaning pump 6a is stopped and the heating of the hot water heater 6 is also stopped. At the same time, the drain valve 31 is opened and the drain pump 6b is driven. Accordingly, the cleaning water is no longer jetted from the rotary cleaning nozzle 5, and the cleaning water stored in the cleaning water reservoir 12 is drained to the outside of the dishwasher 1 by the driving force of the drain pump 6b. And when all the washing water in the washing tank 2 is drained out of the dishwasher 1, the drain valve 31 is closed and the operation of the drain pump 6b is also stopped. Thereby, the cleaning process is completed. Then, a rinsing process is performed following the cleaning process.

In the rinsing step, three independent rinsing steps of rinsing step 1, rinsing step 2 and rinsing step 3 are performed successively.

First, in the rinsing step 1 (the first rinsing step), the water supply valve 9 was opened, the cleaning water was supplied into the cleaning tank 2, and the water level detection sensor 10 lowered the water level (see FIG. 3 (b)). Is detected, the water supply valve 9 is closed by the control means 28. Then, with the water supply valve 9 closed, the cleaning pump 6 a is intermittently operated, and cleaning water is intermittently ejected from the rotary cleaning nozzle 5. Specifically, washing water is intermittently ejected from the rotary washing nozzle 5 when the washing pump 6a is operated by repeating the pause and the action, such as 1 second operation → 1 second pause → 1 second operation. The In the rinsing step 1, since the warm water heater 7 is “OFF”, the cleaning water stored in the cleaning water reservoir 12 is not heated.

  Thus, in the first rinsing step, the cleaning pump 6a is controlled to be intermittently operated at a low water level, and the cleaning water is intermittently ejected from the rotary cleaning nozzle 5, so that the cleaning pump 6a is driven. A lump of washing water having a relatively high kinetic energy at a high injection pressure can be continuously supplied with a predetermined pause time. Thereby, the lump of washing water having relatively high kinetic energy can give a strong impact force to the leftovers attached to the tableware, and the leftovers attached to the tableware can be reliably washed.

Thereafter, the operation of the cleaning pump 6a is stopped. At the same time, the drain valve 31 is opened and the drain pump 6b is driven. Accordingly, the cleaning water is no longer jetted from the rotary cleaning nozzle 5, and the cleaning water stored in the cleaning water reservoir 12 is drained to the outside of the dishwasher 1 by the driving force of the drain pump 6b. And when all the washing water in the washing tank 2 is drained out of the dishwasher 1, the drain valve 31 is closed and the operation of the drain pump 6b is also stopped. Thereby, the rinse process 1 is complete | finished. Then, following the rinsing step 1, a rinsing step 2 is performed.

Since the contents of the rinsing process 2 are the same as those of the rinsing process 1, description thereof is omitted. When the rinsing step 2 is completed, the rinsing step 3 (the last rinsing step) is subsequently performed.

In the rinsing process 3 (the last rinsing process), the water supply valve 9 is opened, the cleaning water is supplied into the cleaning tank 2, and the water amount detection sensor 10 detects that the water level is high (see FIG. 3 (b)). Then, the water supply valve 9 is closed by the control means 28. Then, with the water supply valve 9 closed, the washing water is heated by the hot water heater 7, the washing pump 6 a is continuously operated, and the washing water is continuously jetted from the rotary washing nozzle 5.

  Thus, in the last rinsing step, the cleaning pump 6a is controlled to be continuously operated at a high water level, and the cleaning water is continuously jetted from the rotary cleaning nozzle 5. With the large amount of washing water sprayed, the leftovers attached to the tableware can be washed away reliably, and the leftovers in the washing tank 2 can be accumulated in the leftover filter 18. Thereby, at the time of completion | finish of a rinse process, the leftovers adhering to the washing tank 2 bottom part can be decreased. Then, following the rinsing step 3, a draining step (initial draining step) is performed.

In the initial drainage process of the drainage process, the level of the cleaning water in the cleaning tank 2 is changed from the high water level to the accumulated vegetable water level. Specifically, in the initial drainage process, the drain valve 31 is opened and the drain pump 6b is driven, so that the washing water in the washing tub 2 is discharged out of the dishwasher 1. When the water amount detection sensor 10 detects that the level of the cleaning water in the cleaning tank 2 has become low, the drainage continues for 5 seconds (predetermined time) after the detection. Do. In the present embodiment, the water level of the cleaning water in the cleaning tank 2 is thus set to the residual vegetable accumulation water level that is the lower water level than the lower residual vegetable filter 18b. And if it drains for 5 seconds from the time of becoming a low water level, while the drain valve 31 will be closed, the driving | operation of the drain pump 6b will also be stopped. Thereby, an initial drainage process is completed. In the initial drainage process, since the warm water heater 7 is “OFF”, the cleaning water stored in the cleaning water reservoir 12 is not heated.

As described above, by draining water for 5 seconds (predetermined time) after the water level detection sensor 10 detects the low water level, the cleaning water in the cleaning tank 2 is drained to a position below the leftover filter 18. The water level detection sensor 10 for detecting the state (cleaning water accumulated water level) in which the washing water in the washing tank 2 is drained to a position below the left vegetable filter 18 is separately provided. The number of parts can be reduced. Then, after the initial drainage process of the drainage process, the leftover accumulation process of the drainage process is performed.

In the waste vegetables collecting step of the drainage process, the leftovers attached to the bottom of the washing tank 2 are accumulated on the leftover filter 18. In particular, in the leftover vegetable accumulation step of the drainage step, the leftovers attached to the bottom of the washing tank 2 and the upper leftover filter 18a are accumulated in the lower leftover filter 18b. As described above, the cleaning pump 6a is intermittently operated in the leftover collection process. Specifically, from the state in which the cleaning pump 6a is stopped, the cleaning pump 6a is operated by repeating the pause and operation, such as 0.5 second operation → 0.5 second pause → 0.5 second operation. In the leftover vegetable accumulation process, since the hot water heater 7 is “off”, the cleaning water stored in the cleaning water reservoir 12 is not heated.

In this way, the operation time of the cleaning pump 6a is set to 0.5 seconds, and the rest time is set to 0.5 seconds, so that the rest and the operation are repeatedly executed. The injection pressure can be obtained continuously. As a result, it is possible to obtain a propulsive force sufficient to reliably rotate the rotary cleaning nozzle 5 in spite of the small amount of cleaning water sprayed. Further, since the cleaning water is intermittently ejected from the rotary cleaning nozzle 5, reaction force is intermittently generated in the rotary cleaning nozzle 5 at relatively short intervals due to the injection of the cleaning water. The vibration due to the reaction force generated intermittently at relatively short intervals resonates, so that even if each generated reaction force is a small reaction force, the rotary cleaning nozzle 5 has a large rotational propulsion. Can give power. Further, since the operation time of the cleaning pump 6 a is relatively short, the cleaning water sprayed from the rotary cleaning nozzle 5 does not hit the tableware stored in the cleaning tank 2.

Further, since the cleaning pump 6a is controlled so that the cleaning water sprayed from the rotary cleaning nozzle 5 does not hit the tableware stored in the cleaning tank 2, the cleaning tank 2 is applied by hitting the tableware stored in the cleaning tank 2. The falling position to the bottom becomes the same position, and there is no occurrence of a portion where the leftovers cannot be accumulated. As a result, the washing water can be sprayed evenly over a wide area at the bottom of the washing tank 2 and reliably accumulated in the leftover filter 18 without leaving any leftovers remaining in the wide area of the bottom of the washing tank 2. Can do.

  Moreover, since it does not hit the tableware accommodated in the washing tank 2, the washing water sprayed from the rotary washing nozzle 5 is not dispersed into small water particles, and the energy for stripping the leftovers is not weakened. In this state, the washing water sprayed from the rotary washing nozzle 5 hits the leftovers collected at the bottom of the washing tank 2, and the leftovers can be efficiently peeled off. Further, since the washing water sprayed from the rotary washing nozzle 5 is not dispersed by the tableware stored in the washing tank 2, it is effective as washing water for accumulating the leftovers collected at the bottom of the washing tank 2 in the leftover filter 18. Can be used. Then, the final drainage process of the drainage process is performed following the remaining vegetable accumulation process.

  In the final drainage process of the drainage process, all the washing water in the washing tank 2 is discharged out of the dishwasher 1. Specifically, at the same time as the operation of the cleaning pump 6a is stopped, the drain valve 31 is opened and the drain pump 6b is driven. As a result, the washing water is no longer jetted from the rotary washing nozzle 5, and the washing water stored in the washing water reservoir 12 is brought out of the dishwasher 1 via the drain pipe 24 by the driving force of the drain pump 6b. Drained. And when all the washing water in the washing tank 2 is drained out of the dishwasher 1, the drain valve 31 is closed and the operation of the drain pump 6b is also stopped. As a result, the final drainage process ends and the drainage process ends. And when the last drainage process of a drainage process is complete | finished, a drying process is performed.

In the drying process, the air sent by the blower fan 25 is heated by the hot air heater 26. And the tableware in the washing tank 2 is dried using the air heated by the warm air heater 26 (all are not shown).

The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

Hereinafter, modifications of the present invention will be described.
(1) In the present embodiment, the residual vegetable accumulation water level has been described as a position below the leftover filter 18, but is not limited thereto, and is located below the upper end of the residual vegetable filter 18 (particularly, the lower residual vegetable accumulation filter 18 b. The position below the upper end of the left side) may be set as the remaining vegetable accumulation water level. Even in this case, the same effect as the case where the remaining vegetable accumulation water level is set at a position below the remaining vegetable filter 18 is obtained.

  (2) In the present embodiment, the high water level is described as being near the middle of the root of the rotary cleaning nozzle 5 above the leftover filter 18, but not limited thereto, below the upper end of the root of the rotary cleaning nozzle 5, Any water level that is higher than the low water level may be the high water level. That is, any water level may be used as long as the water level is lower than the rotary cleaning nozzle 5 and higher than the low water level. Even if the high water level is set in this way, the same effect as when the high water level is set near the middle of the root of the rotary cleaning nozzle 5 above the leftover filter 18 is obtained.

  (3) In the present embodiment, the operation time of the cleaning pump 6a is set to 0.4 to 0.6 seconds, the pause time is set to 0.4 to 0.6 seconds, and the pause and the operation are continuously repeated in a short cycle. However, the present invention is not limited to this, and is not limited to this. The operation time is set to 0.4 to 0.6 seconds, the pause time is set to 3.0 to 7.0 seconds, and the pause and the operation are repeated. The intermittent injection may be performed. If the downtime is thus increased, the cleaning water sprayed from the rotary cleaning nozzle 5 returns to the cleaning water reservoir 12 and is then sprayed from the rotary cleaning nozzle 5 again. Sometimes effective. That is, by doing in this way, when the water level in the washing water 2 is low, it is not possible to continuously supply water from the washing pump 6a. In this case, since resonance of vibration in the rotary cleaning nozzle 5 as described above does not occur, a high driving force for rotating the rotary cleaning nozzle 5 cannot be obtained. If the water injection time is lengthened, the necessary water spray amount can be obtained. It goes without saying that such irregular intermittent injection is also intermittent injection within the scope of the present invention.

  That is, the intermittent injection of the present invention includes not only the injection every 0.5 seconds and the intermittent injection with a short period of pause in the present embodiment, but also all intermittent injections that repeatedly execute pause and operation. It is.

It is a figure which shows the internal structure of the dishwasher in one Embodiment of this invention. It is a block diagram which shows the electric constitution of the dishwasher in one Embodiment of this invention. (A) It is the schematic when the inside of the dishwasher in one Embodiment of this invention is seen from upper part. (B) It is AA sectional drawing of Fig.3 (a). It is a figure which shows the driving | running content from the final rinse process of the dishwasher in one Embodiment of this invention to a drainage process. (A) It is a figure which shows the driving | operation of the washing pump of the dishwasher in one Embodiment of this invention. (B) It is a figure which shows the change of a pressure when a general washing | cleaning pump operate | moves from a dormant state. It is a figure which shows the operation | movement content from the washing | cleaning process of a dishwasher in one Embodiment of this invention to a drying process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tableware washing machine 2 Washing tank 5 Rotating washing nozzle 6 Pump 6a Washing pump 6b Drain pump 9 Water supply valve 10 Water quantity detection sensor
12 Washing water reservoir
13 Water inlet 13a Cleaning pump water inlet 13b Drain pump water inlet 18 Left vegetable filter 18a Upper left vegetable filter 18b Lower left vegetable filter 19 Water supply port 24 Discharge pipe 28 Control means 31 Drain valve

Claims (6)

A cleaning tank for storing objects to be cleaned;
A concave wash water reservoir formed in a part of the bottom of the wash tank;
A leftover filter provided in the washing water reservoir;
A rotary cleaning nozzle that injects the cleaning water stored in the cleaning water reservoir toward the object to be cleaned;
A pump for pumping cleaning water to the rotary cleaning nozzle;
A water inlet that communicates with the pump and is disposed below the wash water reservoir;
Drainage means for discharging the wash water of the wash water reservoir;
Water level detecting means for detecting the level of the cleaning water supplied into the cleaning tank;
Control means for controlling the pump in the washing process, the rinsing process, and the draining process, and the control means supplies the washing water in the washing tank to the upper end of the leftover filter in the draining process after the rinsing process is completed. A dishwasher characterized in that, after draining to a lower position, the pump is controlled to operate intermittently for a predetermined time, and cleaning water is ejected intermittently from the rotary cleaning nozzle. . The control means controls the pump so that cleaning water sprayed from the rotary cleaning nozzle does not hit an object to be cleaned contained in the cleaning tank in a draining process after the rinsing process is completed. The dishwasher according to claim 1. The control means controls the pump to operate repeatedly with the operation time being 0.4 to 0.6 seconds and the operation time being 0.4 to 0.6 seconds. The dishwasher according to claim 2. The water level detection means can detect a low water level above the leftover filter,
The control means drains the pump intermittently for a predetermined time after draining for a predetermined time after the low water level is detected by the water level detecting means in the draining process after the rinsing process is completed. The dishwasher according to any one of claims 1 to 3, wherein the washing water is intermittently jetted from the rotary washing nozzle. The water level detection means is capable of detecting a low water level above the leftover filter and a high water level below the rotary cleaning nozzle and higher than the low water level,
The rinsing step has a first rinsing step and a final rinsing step independent of the first rinsing step;
The control means includes
In the first rinsing step, the pump is controlled to operate intermittently at the low water level, and the cleaning water is intermittently injected from the rotary cleaning nozzle,
In the last rinsing step, the pump is controlled to continuously operate at the high water level, and the cleaning water is continuously jetted from the rotary cleaning nozzle. The dishwasher in any one of 3. The leftover filter is detachably provided at the upper portion of the washing water reservoir, and is provided with an upper leftover filter having an opening formed in a part thereof, and is detachably provided at the opening, and has a concave lower portion. It consists of a vegetable filter,
The upper left side vegetable filter is inclined downward from the periphery toward the opening,
In the draining step after the rinsing step, the control means intermittently operates the pump for a predetermined time after draining the cleaning water in the cleaning tank to a position below the upper end of the lower vegetable vegetable filter. The dishwasher according to claim 5, wherein the washing water is intermittently jetted from the rotary washing nozzle.

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