JP2000014620A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate installation and removal of the residue filter of a dishwasher and cleaning work by mounting the filter in such a way that it can be freely removed from the front surface of a dishwasher machine body. SOLUTION: A dishwasher comprises a water collecting part 12 provided on the bottom face of the washing basket of the dishwasher, a washing pump 8, freely rotating arm nozzles 10, 11 for washing and rinsing dishes by injecting water pressurized by the washing pump 8, and a residue filter 25 inserted in a washing water circulating passage formed by the water collecting part 12. The residue filter is mounted on the front surface of the machine body of the dishwater in such a way as to be freely removable from the front surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing process in which washing water is circulated in a path passing through a residue filter in a washing step, and a washing water is circulated in a path not passing through the residue filter in a rinsing step. More particularly, the present invention relates to a dishwasher in which a residue filter is detachably mounted on a front surface of a main body of the dishwasher from a front surface thereof, thereby facilitating attachment, removal, and cleaning operations of the residue filter.

[0002]

2. Description of the Related Art FIG. 5 is a longitudinal sectional view showing the internal structure of a conventional dishwasher.

In the figure, 1 is a dishwasher, 2 is a box-shaped outer frame, 3 is a dishwashing tank, 3a is a step provided at a lower portion of a side wall of the dishwashing tank 3, and 4 is a front opening of the dishwashing tank 3. The door provided in the section, 5 is a tableware lower basket placed on the stepped portion 3a so as to be movable in the front-rear direction, 6 is a rail movable in front and rear mounted on the upper side wall of the dishwashing tank 3, and 7 is a rail. 6 is an upper basket for storing tableware, 8 is a washing pump, 8a is a suction pipe of a washing pump connecting the washing pump and a water reservoir 12 described later, 9 is a motor for driving the washing pump 8, and 10 is a motor. A lower arm nozzle provided at a lower portion of the tableware lower basket 5, the lower arm nozzle 10 has a plurality of small holes 10a on an upper surface thereof, and the nozzle is rotatable around a central portion as a fulcrum. Reference numeral 11 denotes an upper arm nozzle provided at a lower portion of the tableware upper basket. The upper arm nozzle 11 has a plurality of small holes 11a on an upper surface thereof, and the nozzle is rotatable around a central portion as a fulcrum. Reference numeral 11b denotes a Venturi tube for sending the washing water supplied by the washing pump 8 to the upper arm nozzle 11.

[0004] Reference numeral 12 denotes a water reservoir provided on the bottom of the dishwashing tank, and 13 denotes a heater cover disposed below the dishwashing tank 3, which is formed so as to enclose a heater (not shown). 14
Is a water supply solenoid valve provided on the back of the dishwashing tank 3, 15 is an exhaust duct, and 16 is an exhaust port. The exhaust duct 15 is connected to the exhaust port 16 via the dishwashing tank 3. Reference numeral 17 denotes a control panel arranged above the door 4, which is connected to a controller (not shown).

[0005] Reference numeral 18 denotes a drainage pump for discharging the washing water from the water reservoir 12 to the outside of the machine, 19 a blower unit for blowing drying air to the dishwashing tank, 19a a blower fan of the blower unit, and 20 a fan from the blower unit. This is a ventilation duct that guides the ventilation to the exhaust duct.

Reference numeral 21 denotes a runner of the cleaning pump, reference numeral 22 denotes a discharge port of the cleaning pump, and reference numeral 23 denotes a residue filter provided above the water reservoir 12.

Next, the operation of the dishwasher having the above-described configuration will be described with reference to an example of an operation cycle used as a standard.

[0008] The operation cycle is "washing", "water rinsing",
The steps of “warm water rinsing” and “drying” proceed in this order.

First, the dishes are stored in the upper basket 7 and the lower basket 5, and the detergent is set in the detergent dispenser installed on the inner wall of the door (not shown), the door is closed, and the operation button (not shown) of the control panel 17 is pressed. Starts the operation.

In the "washing" step, water is supplied to the reference water level by the water supply solenoid valve 14. Next, the power supply to the heater (not shown) provided in the cleaning tank is started, and at the same time, the cleaning pump 8 is driven. The pressurized water pressurized by the cleaning pump 8 and heated by the heater is jetted from the small hole 10a of the lower arm nozzle and the small hole 11a of the upper arm nozzle. The arm nozzle 11 starts rotating. The number of revolutions is about 20 revolutions per minute, and the washing water is evenly sprayed on the tableware stored in the upper basket 7 and the lower basket 5 of the dishwashing tank 3, and the temperature of the washing water gradually rises. Efficiently removes dirt from tableware by the spraying power of hot water, the action of warm water and the action of detergent. Thereafter, the operation of returning the cleaning water to the cleaning pump 8 via the residue filter 23 and the water reservoir 12 is repeatedly performed.

The controller has a sensor (not shown) for monitoring the temperature and level of the washing water, and a motor 9 for driving the washing pump 8 for monitoring the water level.
Stop every minute and detect water level. The maximum temperature of the washing water in the “washing” step is set to about 65 ° C. When this temperature is detected, the operation of the washing pump 8 and the energization of the heater are stopped, and the “washing” step ends. Next, the drainage pump 18 is driven to discharge the washing water in the dishwashing tank to the outside of the machine.

Next, a "rinse" step is performed. This step is a step of washing away the detergent components, and is called “water supply-jet-drainage”.
Is usually repeated about three times.

Next, a "hot water rinsing" step is performed. In this step, the temperature of the rinsing water is heated to about 70 ° C. and sprayed for the purpose of sterilizing and heating tableware in the washing tank. In this step as well, the motor 9 for driving the cleaning pump 8 is stopped every 10 minutes to monitor the water level to detect the water level. After the hot water rinsing step is completed, a “drain” step is performed. In this step, the drainage pump 18 is driven to drain the washing water stored in the water reservoir 12 out of the machine.

Next, a "drying" step is performed. In this step, the air discharged from the blower fan 19 a of the blower unit 19 is sent to the blower duct 20. The air in the air duct 20 is heated by the heater and sends warm air into the cleaning tank via the exhaust duct 15. The hot air sent into the washing tank hits the dishes stored in the upper basket for storing dishes and the lower basket for storing dishes, and after drying the dishes, is discharged out of the machine from the exhaust port 16.

As described above, in each step of washing and rinsing of the dishwasher, the water supplied to the washing tank is pressurized by the washing pump 8 and heated by the heater while the small holes 10a and 11a of the washing nozzles 10 and 11 are heated. Spray more on tableware.
Thereafter, the circulation operation of returning the cleaning water used for the cleaning and rinsing to the cleaning pump 8 again through the residue filter 23 and the water reservoir 12 is repeatedly performed.

The residue filter 23 provided in the middle of the circulation path collects solids and the like in the circulation path so that the solids are not left on the tableware as much as possible.

Japanese Patent Application Laid-Open No. 63-119730 discloses that in the washing step of a dishwasher, washing water is sprayed from a washing nozzle onto tableware, and then the washing water is again passed through a residue filter and a water reservoir. The circulation operation of returning to the washing pump is repeatedly executed, and in the rinsing step of the dishwasher, rinsing water is injected from the washing nozzle to the tableware, and thereafter, the rinsing water passes through the residue filter and passes through the residue filter. There is disclosed a dishwasher that repeatedly executes a circulating operation of returning to a washing pump again through a sump section without water.

[0018]

In the above-described conventional dishwasher shown in FIG. 5, since the circulation path of the washing water is the same at the time of washing and at the time of rinsing, the circulating water for rinsing at the time of the rinsing operation has a residue. Pass the filter. It is necessary to circulate clean water during the rinsing step, but if the washing water during the rinsing step is circulated through the residue filter, residues such as solids collected during the cleaning operation are accumulated in the residue filter. Therefore, the rinsing water in the rinsing step is contaminated, which causes a problem in hygiene. In addition, since the residue filter is placed on the water reservoir 12 below the dishwashing tank, the work of attaching, removing, and cleaning the residue filter is not easy.

In the dishwasher disclosed in Japanese Patent Application Laid-Open No. 63-119730, since the residue filter of the dishwasher is placed on the bottom of the residue collecting portion, the work for attaching and detaching the filter is performed. The cleaning work is not easy, and the part for the residue is open to the atmosphere and is not sanitary. The present invention has been made in view of the above-mentioned various problems, and can avoid an operation method of circulating rinsing water for washing through a contaminated residue filter, and can perform installation, removal and cleaning operations of the residue filter. An object of the present invention is to provide a sanitary dishwasher that can be easily manufactured.

[0020]

The present invention employs the following means in order to solve the above-mentioned problems.

A dishwashing tank, a water reservoir provided on the bottom of the dishwashing tank, a heater provided in the dishwashing tank for heating washing water and drying air in the washing tank; A blower that blows air for tableware, a pump that pressurizes cleaning water in the cleaning tank heated by the heater and discharges pressurized water, and a motor that drives the pump,
A dish storage basket for storing dishes, a rotatable arm nozzle for spraying the pressurized water for washing and rinsing the dishes, a water reservoir provided on the bottom of the dish washing tank, and the pump provided in the washing tank; A dishwasher comprising a rotatable arm nozzle for injecting the pressurized water to wash and rinse dishes and a residue filter interposed in a circulation path of washing water comprising the water reservoir, wherein the residue filter is a dishwasher. The dishwasher is detachably attached to a front surface of the main body of the washing machine. In the dishwasher, the circulation path includes a washing pipe through which a residue filter is removably inserted, and a side path connecting the residue filter. A rinsing pipe; and a switching means for switching the circulation path to the cleaning pipe during the cleaning step and switching to the rinsing pipe during the rinsing step.

Further, in the dishwasher, the residue filter is detachably mounted in an opening formed in a lever cover provided below a front surface of the dishwasher.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

FIG. 1 is a longitudinal sectional view of the dishwasher according to the present embodiment, and FIG. 2 is a perspective view showing the overall appearance of the dishwasher according to the present embodiment.

In these figures, 1 is a dishwasher, 2
Is a box-shaped outer frame, 3 is a dishwashing tank, 3a is a step provided at a lower portion of a side wall of the dishwashing tank 3, 4 is a door provided at a front opening of the dishwashing tank 3, and 5 is on the step 3a. , A tableware lower basket placed movably in the front-rear direction, 6 is a front and rear movable rail attached to the upper side wall of the dishwashing tank 3, 7 is a tableware upper basket fitted on the rail 6, 8 is a washing Pump,
Reference numeral 9 denotes a motor for driving the cleaning pump 8, and reference numeral 10 denotes a lower arm nozzle provided at a lower portion of the tableware lower basket 5. A plurality of small holes 10a for spraying cleaning water are provided on the upper surface of the lower arm nozzle 10. The nozzle 10 is rotatable around a central portion as a fulcrum. Reference numeral 11 denotes an upper arm nozzle provided at the lower part of the tableware upper basket, and a plurality of small holes 11a for spraying washing water are provided on the upper surface of the upper arm nozzle 11.
The nozzle 11 is rotatable around a central portion. Reference numeral 11b denotes a Venturi tube for sending the washing water supplied by the washing pump 8 to the upper arm nozzle 11. 12
Is a water reservoir provided on the bottom surface of the dishwashing tank, and 13 is a heater cover arranged below the dishwashing tank 3 so as to surround a heater (not shown). 14 is a water supply solenoid valve provided on the back of the dishwashing tank 3, 15 is an exhaust duct, and 16 is an exhaust port. The exhaust duct 15 is connected to the exhaust port 16 via the dishwashing tank 3. Reference numeral 17 denotes a control panel arranged above the door 4, which is connected to a controller (not shown).

Reference numeral 18 denotes a drainage pump that discharges washing water from a water reservoir to the outside of the machine, 19 denotes a blowing unit that blows drying air to the dishwashing tank, and 19a denotes a blowing fan of the blowing unit.
Reference numeral 0 denotes a blower duct that guides the blown air from the blower unit to an exhaust duct.

Reference numeral 21 denotes a runner of the washing pump, 22 denotes a discharge port of the washing pump, 24 denotes a cavity cover formed so as to cover the lower front of the dishwasher, and 24a denotes a filter case insertion hole formed in the cavity cover. , 25 is a filter case arranged in the recess cover 24, 26 is a rinse pipe,
Reference numeral 27 denotes switching means for switching the flow of circulating water from the water reservoir 12 to the washing pump.
The path from the drain 2 to the cleaning pump 8 via the filter case 25 and the path from the reservoir 12 to the cleaning pump 8 without passing through the filter case 25 are switched.

FIG. 3 is a diagram showing a residue filter of the dishwasher according to the present embodiment and a piping configuration relating to the residue filter.

FIG. 4 is a partial perspective view of the residue filter shown in FIG. 3 and the piping structure related to the residue filter.

In these figures, reference numeral 28 denotes switching means 27.
A washing pipe connecting the filter case 25 and the filter case 25 is a filter case storage part attached to the washing pipe, and the filter case 25 is removably inserted into the storage part 29. Three
0 is a residue filter inside the filter case 25, 3
0a is a filtration part of the residue filter,
Is removably inserted into the filter case. Reference numeral 31 denotes a partition plate disposed in the filter case 25, which partitions the entrance side and the exit side of the filter case 25, and forms a flow path through which the washing water passes through the residue filter. A return pipe 32 connects the rinse water outlet of the filter case and the rinse pipe 26.

The cleaning pipe 28 is fixed to the indentation cover 24 through the filter case housing 29. Then, the filter case 25 is removably mounted in the filter case housing portion 29 from the insertion opening 24 a formed in the recess cover 24.

As described above, the filter case 25 is removably inserted into the filter case accommodating portion 29 attached to the washing pipe, and the residue filter 30 having the filtering portion 30a is removably inserted into the filter case. Therefore, the work of attaching, removing and cleaning the residue filter can be easily performed.

The switching means 27 is a path from the water reservoir 12 to the cleaning pump 8 via the cleaning pipe 28, the filter case 25, the residue filter 30 in the filter case, the return pipe 32, and the rinsing pipe 26 during cleaning. To the filter case 25 when rinsing.
The controller is pre-programmed to switch to a path leading to the cleaning pump 8 via the rinsing pipe 26 without passing through.

An inlet end of a filter case 25 having a built-in residue filter is detachably and watertightly attached to an end of the washing pipe 28, and an outlet end of the filter case is detachably and watertightly attached to a return pipe 32. Be attached. Further, a partition plate 31 is formed in the filter case 25, and the circulating water flowing into the filter case passes through the residue filter 30 and then flows into the return pipe 32.

Next, the operation of the dishwasher having the above-described configuration will be described with reference to an example of an operation cycle in which standard operation is used.

The operation cycles are "washing", "rinsing with water",
The steps of “warm water rinsing” and “drying” proceed in this order.

First, the dishes are stored in the upper basket 7 and the lower basket 5, and the detergent is set in the detergent dispenser installed on the inner wall of the door (not shown), the door is closed, and the operation button (not shown) of the control panel 17 is pressed. Starts the operation.

In the “washing” step, water is supplied to the reference water level by the water supply solenoid valve 14. Next, the pump 8 is driven at the same time as the energization of the heater (not shown) provided in the cleaning tank is started. Pressurized water pressurized by the pump 8 and heated by the heater is jetted from the small hole 10a of the lower arm nozzle and the small hole 11a of the upper arm nozzle. At the same time, the lower arm nozzle 10 and the upper arm nozzle 11 starts rotating. The number of revolutions is about 20 revolutions per minute, and the washing water is evenly sprayed on the tableware stored in the upper basket 7 and the lower basket 5 of the dishwashing tank 3, and the temperature of the washing water gradually rises. Efficiently removes dirt from tableware by the spraying power of hot water, the action of warm water and the action of detergent. Thereafter, the washing water flows from the sump section 12 into the washing pipe 28 via the switching valve 27 switched to the filter case side, and then passes through the residue filter 30 in the filter case 25,
Here, solid matter is collected. Next, the circulating water from which solids have been removed is sucked into the washing pump from the rinsing pipe 26 through the return pipe 32. Is repeatedly executed.

The controller has a sensor (not shown) for monitoring the temperature and level of the washing water, and stops the motor 9 for driving the pump 8 every 10 minutes to detect the water level in order to monitor the water level. The maximum temperature of the washing water in the “washing” step is set to about 65 ° C. When this temperature is detected, the operation of the pump 8 and the energization to the heater are stopped, and the “washing” step ends. Next, the drainage pump is driven to discharge the washing water in the dishwashing tank to the outside of the machine.

Next, the step of "water rinsing" is performed. In this step, each step of "water supply-rinse water injection-drainage" is repeated, usually about three times. In the rinsing water spraying step, pressurized water pressurized by the pump 8 is sprayed from the small hole 10a of the lower arm nozzle 10 and the small hole 11a of the upper arm nozzle 11, and at the same time, the lower arm nozzle 10 And the upper arm nozzle 11 starts rotating. The number of revolutions is about 20 revolutions per minute, and the washing water is evenly sprayed on the tableware stored in the upper basket 7 and the lower basket 5 of the dishwashing tank 3, and the detergent component of the dish is efficiently removed by the spraying power of the rinse water. . afterwards,
Switching means 27 in which rinsing water is switched to the rinsing pipe side
Through the rinsing pipe 26 and returning to the cleaning pump 8. For this reason, in the rinsing step after the end of the washing step, the circulating water does not pass through the residue filter 30, and the rinsing step can be performed with clean water not contaminated by the residue filter, and a sanitary dishwasher can be obtained. .

Next, a "hot water rinsing" step is performed. In this step, the temperature of the rinsing water is heated to about 70 ° C. for the purpose of sterilizing and heating the dishes in the washing tank, and the small hole 10a of the lower arm nozzle 10 and the upper arm nozzle are heated in the same manner as in the water rinsing step. This is performed by repeatedly jetting from the 11 small holes 11a. After the hot water rinsing step is completed, a “drain” step is performed. In this step, the drainage pump 18 is driven to drain the washing water stored in the water reservoir 12 out of the machine.

Next, a "drying" step is performed. In this step, the air discharged from the blower fan 19 a of the blower unit 19 is sent to the blower duct 20. The air in the air duct is heated by the heater and sends warm air into the cleaning tank through the exhaust duct 15. The hot air sent into the washing tank hits the dishes stored in the upper basket 7 and the lower basket 5, and is dried out of the exhaust port 16 after the dishes are dried.

Although the present invention has been described with reference to a large built-in dishwasher as an example shown in the drawings, the present invention is also applicable to a so-called desk-type dishwasher mounted on a kitchen countertop.

[0044]

As described above, according to the present invention, it is possible to provide a dishwasher for circulating rinse water and washing dishes with clean water in a path that does not pass through the residue filter during the rinsing step. In addition, it is possible to provide a dishwasher in which the residue filter is detachably mounted on the front surface of the main body of the dishwasher from the front surface, and the attachment and detachment of the residue filter and the cleaning operation are easy.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a dishwasher according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an overall appearance of the dishwasher according to the embodiment of the present invention.

FIG. 3 is a diagram illustrating a residue filter and a piping configuration related to the residue filter of the dishwasher according to the embodiment of the present invention.

FIG. 4 is a partial perspective view of a residue filter shown in FIG. 3 and a piping configuration related to the residue filter.

FIG. 5 is a longitudinal sectional view showing the internal structure of a conventional dishwasher.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dishwasher 3 Dishwashing tank 4 Door provided at the front opening of the dishwashing tank 5 Lower basket for storing dishes 7 Upper basket for storing dishes 8 Cleaning pump 9 Motor 10 Lower arm nozzle 11 Upper arm nozzle 12 Water reservoir Reference Signs List 16 exhaust port 17 control panel 18 drain pump 19 blower unit 20 blower duct 24 burr cover 24a filter case insertion port 25 filter case 26 rinse pipe 27 switching means 28 washing pipe 29 filter case storage section 30 residue filter 31 partition plate 32 return pipe

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Satoshi Miyataka 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture F-term (reference) 3B082 BG01 BG04

Claims (3)

[Claims] 1. A dishwashing tank, a water reservoir provided on a bottom surface of the dishwashing tank, a heater provided in the dishwashing tank and heating washing water and drying air in the washing tank, A blower that blows the drying air to the tableware, a pump that pressurizes cleaning water in the cleaning tank heated by the heater and discharges pressurized water, and a motor that drives the pump, and is provided in the cleaning tank. A tableware storage basket for storing tableware and a rotatable arm nozzle for injecting the pressurized water to wash and rinse the dishes, and a water reservoir provided on the bottom of the dishwashing tank, the pump, and the pressurized water. A dishwasher comprising: a rotatable arm nozzle for washing and rinsing tableware; and a residue filter interposed in a circulation path of the washing water comprising the reservoir, wherein the residue filter is a main body of the dishwasher. A dishwasher characterized by being detachably mounted on the front from the front. 2. The cleaning circuit according to claim 1, wherein the circulation path includes a cleaning pipe through which a residue filter is removably inserted, a rinsing pipe that bypasses the residue filter, and a cleaning pipe through which the circulation path is cleaned during a cleaning step. A dishwasher, comprising: switching means for switching to a rinsing pipe side during a rinsing step. 3. The dish filter according to claim 1, wherein the residue filter is detachably mounted in an opening formed in a lever cover provided below a front surface of the dishwasher. Dishwasher.