JP2019205689A - dishwasher - Google Patents

Abstract

To provide a dishwasher where a washing tank is provided so as to be drawn out of a housing, the constitutions of a water supply hose and the lower part of the washing tank are simplified, and the depth size of the washing tank is enlarged to increase the volume thereof.SOLUTION: A dishwasher includes: a housing 1 having a front opening part on its front face; a washing tank 2 provided in the housing 1 to house objects to be washed D; a water supply part 4 including a flexible water supply hose 18 to supply washing water into the washing tank 2; an air break device 17 included in the water supply part 4 to prevent backflow of the washing water; and a control part 15 executing a washing operation including a washing process and a rinsing process. The washing tank 2 is open at its top surface and is provided so as to be drawn out of the housing 1. The air break device 17 is installed on the outer rear face of the washing tank 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a dishwasher for washing dishes using washing water.

  In a dishwasher for washing dishes and the like, washing water pressurized by a washing pump is generally sprayed from the washing nozzle toward the dishes, and the dirt adhering to the dishes is washed away and washed. Washing water used for washing is supplied into a washing tank from a water supply unit connected to a water pipe, and is used for washing together with a detergent and a dry finishing material. At this time, when the water pipe pressure becomes negative for some reason, if cleaning water mixed with detergent in the washing tank flows back into the water pipe, clean water is contaminated and this is a sanitary problem. Become. Therefore, even when the water pipe becomes negative pressure, an air break device (air blocking part) is provided so that the cleaning water in the cleaning tank does not flow back to the water pipe (see, for example, Patent Document 1).

  Patent Document 1 describes a dishwasher having a water softener including an air blocking unit. As shown in FIG. 6, this water softener is located in the water supply (238) of the dishwasher, between the main supply valve and the cleaning chamber. The water softener includes a resin container (207) having an ion exchange resin (290). The water supplied to the cleaning chamber optionally passes through the resin container (207). Regeneration brine is performed in a brine container (203). The brine container (203) is artificially supplied with water separated into the container from the main supply source in the solid salt (270) and the air blocking part (201). In the regeneration cycle, the brine is fed from the brine container (203) to the resin container (207) by the pump (206).

  In addition, the water softener including the air blocking unit may need to be replenished with solid salt and is disposed in the hollow wall between the front panel and the cleaning chamber.

JP 2005-522290 Gazette

  In the prior art dishwasher, a water softener including an air block is placed in the hollow wall between the front panel and the washing chamber. That is, the air blocking part is located in front of the cleaning chamber. And behind the cleaning chamber, a water supply hose, a drainage hose, and a support part for supporting these to be folded are provided. In this way, the air blocking part is disposed in front of the cleaning chamber, the water supply / drain hose and their supporting parts exist behind the cleaning chamber, and the cleaning chamber becomes smaller in the front-rear direction with respect to the depth size of the housing. Therefore, there is a problem that the volume of the cleaning chamber becomes relatively small. Moreover, it is necessary to route the water supply hose from the rear part to the front part of the cleaning tank, and there is a problem that the configuration of the water supply hose and the lower part of the cleaning tank becomes complicated. The present invention solves the above-mentioned conventional problems, and in a dishwasher in which a washing tub is provided so as to be able to be pulled out from a housing, the structure of the water supply hose can be simplified, and the depth size of the washing tub can be increased to increase the volume The purpose is to provide a dishwasher.

In order to solve the conventional problems, the dishwasher of the present invention is:
A casing having a front opening on the front surface, a cleaning tank provided in the casing and containing an object to be cleaned, a water supply section that includes a flexible water supply hose and supplies cleaning water into the cleaning tank, and the water supply An air break device that is included in a section and prevents a backflow of the cleaning water, and a control section that executes a cleaning operation including a cleaning process and a rinsing process, and the cleaning tank is opened from the upper surface and drawn out from the housing The air break device is provided outside the rear surface of the cleaning tank.

  With this configuration, the configuration of the water supply hose and the lower portion of the cleaning tank can be simplified, the depth size of the cleaning tank can be increased, and the volume can be increased.

  In the dishwasher of the present invention, in the dishwasher in which the washing tub is provided so that it can be pulled out from the inside of the housing, the configuration of the water supply hose and the lower portion of the washing tub can be simplified, and the depth size of the washing tub can be increased to increase the volume.

Side cross-sectional schematic diagram of the dishwasher in Embodiment 1 of this invention Side cross-sectional schematic diagram of the state where the washing tub was pulled out from the state of the dishwasher shown in FIG. Rear side perspective view of the dishwasher in the present embodiment Rear side perspective view of the dishwasher in the present embodiment with a part of the outer shell removed The perspective view of the dishwasher in other embodiment of this invention Side sectional view of a conventional dishwasher

The dishwasher of the first invention is
A casing having a front opening on the front surface, a cleaning tank provided in the casing and containing an object to be cleaned, a water supply section that includes a flexible water supply hose and supplies cleaning water into the cleaning tank, and the water supply An air break device that is included in a section and prevents a backflow of the cleaning water, and a control section that executes a cleaning operation including a cleaning process and a rinsing process, and the cleaning tank is opened from the upper surface and drawn out from the housing The air break device is installed outside the rear surface of the cleaning tank. With this configuration, the configuration of the water supply hose and the lower portion of the cleaning tank can be simplified, the depth size of the cleaning tank can be increased, and the volume can be increased.

In particular, the second invention is the first invention,
While supporting the said water supply hose, a support part movable back and forth is provided. With this configuration, the support portion moves smoothly while supporting the water supply hose when the cleaning tank is taken in and out, and supports the water supply hose so as not to interfere with other parts and bend excessively. With this configuration, the load on the water supply hose is suppressed, and the washing tank is smoothly put in and out.

According to a third invention, in the second invention,
The air break device and the support portion are provided at positions that do not overlap in front view. With this configuration, since the air break device and the support portion do not overlap when the cleaning tank is accommodated, the required depth space can be reduced. With this configuration, the cleaning tank can be enlarged in the front-rear direction with respect to the depth size of the housing, and the volume of the cleaning tank can be increased.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic side sectional view of the dishwasher according to Embodiment 1 of the present invention. FIG. 1 shows a state in which the dishwasher is built in the system kitchen SK. FIG. 2 is a schematic side sectional view of the dishwasher shown in FIG. 1 with the washing tub 2 drawn out. FIG. 3 is a rear perspective view of the dishwasher in the present embodiment. FIG. 4 is a rear perspective view of the dishwasher according to the present embodiment with a part of the outer shell removed. The dishwasher shown in FIG. 4 has the left and right side surfaces, the lower surface and the rear shell removed.

  The dishwasher of the present embodiment includes a housing 1, a washing tank 2, a washing pump 3, a water supply unit 4, a door body 5, and the like. In the following embodiments, as shown in FIG. 1, the front direction is described as a direction in which the door body 5 and the cleaning tank 2 are pulled out, and the rear direction is described as a direction in which the cleaning tank 2 is stored and the door body 5 is closed. . Further, the dishwasher installation side will be described as the lower side, the opposite side as the upper side, and the right side toward the front of the door 5 will be described as the right side and the left side as the left side.

  The housing 1 has a front opening 1a on the front surface. Further, a back cover 16 for maintenance is provided on the outer shell on the rear surface. The cleaning tank 2 includes a table basket 6, a cleaning nozzle 7, a drain port 8, a residue filter 9 and the like. The cleaning tank 2 is provided in the housing 1 so that it can be taken in and out in the front-rear direction. The cleaning tank 2 has an upper surface opening 2a on the upper surface. The upper surface opening 2 a is closed by an inner lid 10 disposed in the housing 1 when the cleaning tank 2 is accommodated in the housing 1. The inner lid 10 moves up and down by the link mechanism 11 in conjunction with the insertion and removal of the cleaning tank 2. A seal portion 12 formed of a deformable hollow rubber tube is provided at the peripheral portion of the upper surface opening 2a. When the cleaning tank 2 is accommodated in the housing 1, the seal portion 12 is compressed by the descending inner lid 10 and the upper surface opening 2 a is sealed.

  In the tableware basket 6, an object to be cleaned D such as tableware is placed. The door body 5 is provided in the front part of the washing tank 2 and covers the front surface of the housing 1 when stored. The cleaning tank 2 is taken in and out by holding a handle 5 a provided on the door body 5. The water supply unit 4 includes a water supply channel 4a, a water supply valve 4b, an air break device 17, a water supply hose 18, and the like. The water supply path 4a is connected to a water pipe (not shown). The water supply valve 4 b is provided in the water supply path 4 a at the rear part in the housing 1. The water supply valve 4b supplies tap water as cleaning water to the cleaning tank 2 when opened.

  The air break device 17 is installed outside the rear surface of the cleaning tank 2. The air break device 17 is configured so that the cleaning water in the cleaning tank 2 does not flow back to the water pipe even when the water pipe has a negative pressure. The water supply hose 18 flexibly connects the cleaning tank 2 that moves back and forth and the air break device 17. The water supply hose 18 is formed of a flexible material such as silicone rubber. A detachable back cover 16 is provided on the rear surface of the housing 1. By removing the back cover 16, maintenance of the water supply unit 4 and the drainage unit is performed.

  The cleaning pump 3 is provided outside the bottom surface of the cleaning tank 2. The cleaning nozzle 7 is provided inside the bottom surface of the cleaning tank 2. The cleaning pump 3 pumps cleaning water to the cleaning nozzle 7. The cleaning nozzle 7 injects cleaning water toward the object D to be cleaned placed on the table basket 6 while rotating by the reaction force of the pumped cleaning water. That is, the cleaning pump 3 pressurizes the cleaning water stored in the cleaning tank 2 and supplies it to the cleaning nozzle 7. The cleaning water sprayed from the cleaning nozzle 7 collides with an object to be cleaned, removes dirt, and performs cleaning. The cleaning water includes a cleaning liquid that includes a detergent and is sprayed onto the object to be cleaned, and rinse water for rinsing the object to be cleaned.

  The drain port 8 is provided at the bottom of the cleaning tank 2. The residue filter 9 is detachably provided in the drain port 8 and collects residue that has been cleaned and removed from the object to be cleaned. The heater 13 is disposed so as to be immersed in the cleaning water stored in the bottom of the cleaning tank 2. The heater 13 heats the washing water stored in the washing tank 2 in the washing step. The heater 13 heats the drying air in the cleaning tank 2 in the drying process. A temperature sensor 14 such as a thermistor disposed outside the bottom surface of the cleaning tank 2 detects the temperature of the cleaning tank 2.

  The cleaning pump 3 is connected to the drain port 8 on the suction side, and circulates the cleaning water from which the residue is removed by the residue filter 9. Furthermore, the cleaning pump 3 functions as a drainage pump by reversing the rotation direction of the motor during circulation, and discharges the cleaning water from the cleaning tank 2. A drainage pump may be provided independently. Further, a drain valve may be provided instead of the drain pump, and the cleaning water may be drained by a natural fall due to gravity by opening the drain valve.

  The drainage unit includes a drainage port 8, a drainage hose 19, a drainage channel 20, a drainage pump, and the like. The drainage channel 20 is provided side by side with the water supply channel 4a at the rear part in the housing 1. The drain hose 19 flexibly connects the outlet of the cleaning pump 3 that functions as a drain pump and the drain 20. The drain hose 19 is formed of a flexible material such as silicone rubber.

  The water supply hose 18 and the drainage hose 19 are provided in parallel so as to draw a semicircle in the housing 1. These two hoses are supported by a movable support portion 21 so that the front and rear movements of the cleaning tank 2 can be followed. The support portion 21 includes a support piece 21a, a fixed piece 21b, and a support shaft 21c. The support piece 21 a holds the water supply hose 18 and the drainage hose 19. The fixed piece 21b is fixed to the housing 1. The support shaft 21c is connected to the fixed piece 21b so that the support piece 21a can turn around the support shaft 21c. When the cleaning tank 2 is pulled out, the support portion 21 sends out the water supply hose 18 and the drainage hose 19 while turning forward. Moreover, the support part 21 accommodates the water supply hose 18 and the drainage hose 19 in a predetermined position so that it may not be bent forcibly while turning back, when the washing tank 2 is accommodated.

  As a result, the support portion 21 supports the water supply hose 18 and the drainage hose 19 in a smooth turn when the cleaning tank 2 is taken in and out, and the water supply hose 18 and the drainage hose 19 interfere with other parts. To prevent breakage or blockage. And while the load to the water supply hose 18 and the drainage hose 19 is suppressed, the washing tank 2 is taken in and out smoothly.

  Note that the flexible water supply hose 18 and the flexible drainage hose 19 do not necessarily need to be flexible as a whole, and can be folded or twisted so as not to be crushed at a predetermined portion, and may be configured to be folded. Further, the water supply hose 18 and the drainage hose 19 are not limited to be provided in parallel, and the support portion 21 supports only the water supply hose 18, and the drainage hose 19 may be supported in different configurations.

  As shown in FIG. 4, the air break device 17 and the support portion 21 are provided at positions shifted in the vertical and horizontal directions so as not to overlap in front view. Further, the water supply path 4 a, the drainage path 20, the water supply hose 18 and the drainage hose 19 are also provided so as to surround the air break device 17. As a result, the space between the cleaning tank 2 and the rear surface of the housing 1 when the cleaning tank 2 is accommodated only needs to be provided with a space that can accommodate these parts having the largest depth size. Therefore, the required depth space size can be reduced. Thereby, the washing tank 2 can be enlarged in the front-rear direction with respect to the depth size of the housing 1, and the volume of the washing tank 2 can be increased.

  The control unit 15 that executes the cleaning operation is provided inside the door body 5 and outside the front surface of the cleaning tank 2. The control unit 15 includes a washing process for washing the article to be cleaned D, a rinsing process for flowing a detergent and residue attached to the article to be cleaned D, and a drying process for drying the article to be cleaned D. These steps are sequentially performed. Control.

Next, operation | movement of a dishwasher provided with the said structure is demonstrated. First, the user holds the handle 5a of the door 5 and pulls out the washing tub 2 from the housing 1 of the dishwasher. At this time, the water supply hose 18 and the drainage hose 19 provided behind the cleaning tank 2 are pulled forward together with the cleaning tank 2. By this tensile force, the support portion 21 feeds the water supply hose 18 and the drainage hose 19 while turning forward. As a result, the water supply hose 18 and the drainage hose 19 can be prevented from being damaged or blocked due to interference or bending with other components.

  The user sets an object to be cleaned D such as tableware in the tableware basket 6 from the upper surface opening 2a of the opened cleaning tank 2, and puts in detergent. Thereafter, the cleaning tank 2 is pushed into the housing 1 and accommodated, and the door body 5 is closed. At this time, the water supply hose 18 and the drainage hose 19 provided behind the cleaning tank 2 are pushed together with the cleaning tank 2. With this pressing force, the support portion 21 accommodates the water supply hose 18 and the drainage hose 19 at predetermined positions while turning backward. As a result, the water supply hose 18 and the drainage hose 19 can be prevented from being damaged or blocked due to interference or bending with other components.

  And a user sets a driving course with an operation part (not shown) provided in control part 15, operates a start button (not shown), for example, and starts washing operation. Thereby, the control part 15 performs a washing | cleaning driving | operation based on an operation course. The control unit 15 sequentially executes a washing process, a rinsing process, and a drying process.

  The controller 15 first performs a washing process. The control unit 15 operates the water supply valve 4 b to supply a predetermined amount of cleaning water to the cleaning tank 2 through the water supply hose 18 and the air break device 17. When the water supply is completed, the cleaning pump 3 is driven to pump the cleaning water, and the cleaning water is sprayed from the cleaning nozzle 7 disposed near the bottom of the cleaning tank 2 toward the object D to be cleaned. The controller 15 energizes the heater 13 while spraying the cleaning water to heat the cleaning water. At this time, the control unit 15 detects the temperature of the cleaning water through the wall of the bottom surface of the cleaning tank 2 by the temperature sensor 14 and controls the cleaning water to have a predetermined temperature.

  The cleaning water sprayed from the cleaning nozzle 7 cleans the object to be cleaned D, passes through the residual filter 9 and the drain port 8, and is sucked into the cleaning pump 3 again. The cleaning pump 3 pumps the sucked cleaning water, supplies the cleaning water to the cleaning nozzle 7 and circulates it for cleaning. After executing the washing process for a predetermined time (for example, 30 minutes), the control unit 15 reverses the rotation direction of the motor of the washing pump 3, and the washing water containing dirt in the washing tank 2 is discharged from the drain port 8 to the drain 20. It is discharged out of the housing 1 through.

  Next, a rinsing step is performed following the washing step. The control unit 15 operates the water supply valve 4 b to newly supply a predetermined amount of cleaning water to the cleaning tank 2. The control unit 15 drives the cleaning pump 3 and ejects cleaning water from the cleaning nozzle 7 in the same manner as in the cleaning process. As a result, the detergent and residue remaining on the object to be cleaned D are washed away with the cleaning water. At this time, rinsing operations such as discharge of rinse water, rinse, and supply of rinse water are repeated a plurality of times (for example, 2 to 3 times).

  And the control part 15 will heat the air in the washing tank 2 with the heater 13, and will air with a fan (not shown), after a rinse process is complete | finished. Thereby, the to-be-cleaned object D is dried. The controller 15 performs the drying process for a predetermined time (for example, 30 minutes), and the cleaning operation ends.

  As described above, the dishwasher according to the present embodiment includes a housing 1 having a front opening on the front surface, a cleaning tank 2 provided in the housing 1 and containing an object to be cleaned D, and a flexible water supply hose. 18 includes a water supply unit 4 that supplies cleaning water into the cleaning tank 2, an air break device 17 that is included in the water supply unit 4 to prevent backflow of the cleaning water, and a control that executes a cleaning operation including a cleaning process and a rinsing process. The cleaning tank 2 is provided so that the upper surface is opened and can be pulled out from the housing 1, and the air break device 17 is installed outside the rear surface of the cleaning tank 2. With this configuration, the configuration of the water supply hose 18 and the lower portion of the cleaning tank 2 can be simplified without drawing the water supply hose 18 to the front of the cleaning tank 2, and the depth size of the cleaning tank 2 can be increased to increase the volume.

  Moreover, while supporting the water supply hose 18, the support part 21 movable back and forth is provided. With this configuration, the support portion 21 moves smoothly while supporting the water supply hose 18 when the cleaning tank 2 is taken in and out, and supports the water supply hose 18 so as not to interfere with other parts and bend excessively. . Thereby, while the load to a water supply hose is suppressed, the washing tank 2 is taken in and out smoothly.

  Moreover, in the dishwasher of this Embodiment, although the washing tank 2 demonstrated with the drawer-type structure, it is not restricted to this. For example, a drawer type dishwasher as shown in FIG. 5 can be applied. In FIG. 5, a cleaning tank 72 is configured inside the casing 71. The door body 73 is supported by the support rail 74 and slides back and forth to open and close the front opening 72 a of the cleaning tank 72. The tableware basket 75 is supported by a car rail 76, is locked to the door body 73, and slides back and forth.

  As described above, the dishwasher according to the present invention simplifies the configuration of the water supply hose and the lower part of the washing tank, and can increase the depth size of the washing tank to increase the volume, so that it is useful as a dishwasher for home use. .

DESCRIPTION OF SYMBOLS 1 Housing | casing 1a Front opening part 2 Washing tank 2a Upper surface opening part 3 Washing pump 4 Water supply part 4a Water supply path 4b Water supply valve 5 Door body 6 Tableware basket 7 Cleaning nozzle 8 Drain outlet 9 Residual filter 10 Inner lid 11 Link mechanism 12 Seal Part 13 Heater 14 Temperature sensor 15 Control part 16 Back cover 17 Air break device 18 Water supply hose 19 Drain hose 20 Drainage path 21 Support part 21a Support piece 21b Fixed piece 21c Spindle 71 Housing 72 Cleaning tank 72a Front opening 73 Door body 74 Support rail 75 Tableware basket 76 Basket rail D Object to be cleaned SK System kitchen

Claims (3)

A casing having a front opening on the front surface, a cleaning tank provided in the casing and containing an object to be cleaned, a water supply section that includes a flexible water supply hose and supplies cleaning water into the cleaning tank, and the water supply An air break device that is included in the section to prevent the backflow of the washing water, and a control unit that executes a washing operation including a washing step and a rinsing step,
The cleaning tank is provided so that an upper surface is opened and can be pulled out from the housing.
The air break device is provided outside the rear surface of the cleaning tank,
dishwasher. While supporting the water supply hose, a movable support part is provided in the front and rear.
The dishwasher according to claim 1. The air break device and the support portion are provided at positions that do not overlap in front view,
The dishwasher according to claim 2.