JP2003180598A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a conventional dishwasher requires a large blower for maintaining air flow against the reduced air flow by a large resistance of a pipe line, since the conventional dishwasher has piping which is disposed upward and then downward to finally blow air into a washing compartment from a blower disposed at the lower part of the main body as prevention means against a backflow of steam generated at a washing process into the blower. <P>SOLUTION: A shutter, which is shut by its own weight, is provided in the vicinity of an outlet of the blower. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a dishwasher.

[0002]

2. Description of the Related Art Generally, there is no product in which a shutter is arranged at the air outlet of the air blower itself of a dishwasher. It is generally used in an open state. This dishwasher prevents steam, so-called steam, from flowing up through the ventilation passage to the blower when the water is warmed during washing or heating and rinsing. In the past, as a measure against this, it was general to arrange a blower at the bottom of the main body, bring the pipe to the upper side, lower it from there, and then blow the air into the cleaning tank.

[0003]

However, in the above-mentioned conventional method, there is a drawback in that the duct resistance becomes large, the air volume drops, and the blower becomes large in order to maintain the air volume. Further, it is necessary to insert the air blower into the space saving portion, and it is difficult to arrange a large air blower.

Therefore, the pipeline cannot be lengthened. It is necessary to secure the air volume with a small blower fan to save space. It is essential to prevent water droplets from adhering by the reverse flow of steam. This will be described with reference to FIG. The latter half of washing and heat rinsing,
When the temperature in the cleaning tank 101 reaches 60 to 80 ° C, steam is emitted. That is, steam invades from the air outlet of the cleaning tank 101 in the opposite direction, is cooled by the outside temperature, and is cooled by the outside air temperature.
Water droplets 310 are formed inside. The water droplets 310 cause water leakage, breakage of the substrate, and generation of rust on the shaft of the blower motor 308. Therefore, from the above, it is a safety requirement to prevent the inflow of steam even if the pipeline is shortened.

[0005]

Therefore, in the present invention, shutters for opening and closing even the air volume of a small thin air blower are provided at two places, the inlet of the cleaning tank and the outlet of the air blower, and the packing of the shutter of the air blower is provided. It was decided to have a structure that shuts off steam. The contents of the present invention will be described in detail with reference to FIG. FIG. 9 is a perspective view of the blower 117 as a whole. The lower shutter 320 arranged on the side of the cleaning tank and the upper shutter 318 arranged on the side of the blower fan 316 completely prevent vapor from entering the blower fan 316. The lower shutter is mainly for preventing the invasion of the cleaning liquid by spraying the cleaning liquid. A small amount of high-temperature hot water that has entered the lower shutter, water droplets generated when steam is cooled by the outside air temperature, and the upper shutter 318 completely block the water. The upper shutter is made of ultra-thin resin such as mylar 318a
A light-weight shutter in which a soft member 318b is attached is provided. When the blower motor 308 is driven, the fan 31
4 rotates, and the wind passes through the pipe and flows into the cleaning tank. 322
Is the blower fan 316 presser guide and the nail 3 from the cleaning tank side.
24 is integrated with the cleaning tank. Reference numeral 312 is a dust prevention net.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to one embodiment shown in FIGS. FIG. 1 is a perspective view of a dishwasher incorporated in a system kitchen. The dishwasher in this embodiment includes two dishwasher tank units 10
It is a configuration in which 0, 200 are assembled in the system kitchen 300 in a combined state so as to be stacked vertically in two stages.

Two dish washing tank units 100, 200
Since most of them have the same configuration, the common configuration has the dish washing tank unit 10 located in the upper stage.
The configuration will be described by exemplifying 0.

The dish washing tank unit 100 accommodates a pull-out type washing tank 101 in a case 102 so as to be movable back and forth,
Put the dishes in and out and put the detergent in the pulled out state, and wash (wash, rinse, dry) in the pushed state. The front panel 103 attached to the front side surface of the cleaning tank 101 is
The front panel 103 is provided with 104 provided on the front edge surface and an operation panel 105 provided on the upper end surface.

A concrete assembly structure of the dish washing tank unit 100 will be described with reference to FIGS.

The washing tank 101 for accommodating dishes is formed by resin molding into a box shape having an open upper side. A flat brushless motor 10 is provided outside the bottom wall of the cleaning tank 101.
6 is attached, and the inner end of the rotating shaft of the brushless motor 106 penetrates the bottom wall of the cleaning tank 101 to clean the cleaning tank 10.
1, and the cleaning pump blade 107 is fitted. Around the brushless motor mounting portion on the bottom wall of the cleaning tank 101, a water reservoir 108 is formed to be low, and the cleaning liquid is mounted with a gap forming a suction passage of the cleaning pump blade 107 between the cleaning liquid and the bottom wall. Provide a suction guide 109,
It is configured so that the suction force of the cleaning pump blade 107 can efficiently act on the cleaning liquid in the water reservoir 108.
The nozzle arm 110 has a water inlet 1 formed at the center thereof.
10a is rotatably fitted to the cleaning suction guide 109 so as to surround the discharge port of the cleaning pump blade 107 and receive the cleaning liquid discharged from the cleaning pump blade 107. The nozzle arm 110 includes the cleaning pump blade 107.
The cleaning liquid received from the above is sprayed from a plurality of cleaning spray holes 110b provided on the upper surface of the nozzle arm 110 at right angles or diagonally upwards, and the dishes are washed. Further, the nozzle arm 110 rotates the water discharged from the cleaning pump blade 107 by the force of applying the water to the side wall of the nozzle arm 110 by the guide 110c. In addition, the nozzle arm 110
A plurality of holes 110d at the bottom of the side wall of the partition plate 11
The residual food attached to the partition plate 111 is caused to flow by this injection that is obliquely sprayed toward the upper surface of No. 1 to prevent the residual food from adhering to the partition plate. Between the cleaning liquid suction guide 109 and the nozzle arm 110, a partition plate 111 with a filter mesh for partitioning the bottom of the cleaning tank 101 into upper and lower parts is installed, and on the back side (lower side) of this partition plate 111 is a substantially annular sheathed heater 112. To place.

A drain pump vane 113 is fitted to the outer end of the rotary shaft of the brushless motor 106, and a drain pump case 114 surrounding the drain pump vane 113 is attached. The drainage pump case 114 includes the cleaning tank 1
Water inlet 114a connected to the bottom of 01 and the drain hose 1
A drain port 114b connected to 15 and an air vent 1 for connecting an air vent hose 116 so as to open in the cleaning tank 101.
14c is provided.

The drain pump blades 113 do not exert a drain pump function when the brushless motor 106 is normally rotated (cleaning mode), but exerts a drain pump function when the brushless motor 106 is reversely rotated (drain mode). To do.

An air blower 117 is installed outside the front side wall of the cleaning tank 101 to blow drying air into the lower portion of the cleaning tank 101 and circulate it. The moist air in the cleaning tank 101 is exhausted to the outside of the machine through an exhaust port 101a formed on the side wall.

Further, in the cleaning tank 101, a dish table 118 is installed so as to be located above the nozzle arm 110. The tableware placing unit 118 is configured such that the dishwashing unit 200 located in the lower stage can selectively install the cooking utensil placing unit for each tableware placing unit. As shown in FIG. 4, the tableware placing table is configured to be suitable for placing tableware such as bowls, plates and cups, and the cooking utensil placing table, as shown in FIG. It is configured to be suitable for placing tableware and cooking utensils such as pots and balls side by side.

A packing contact 101b for contacting and sealing the hollow packing 119 is formed all around the upper edge of the cleaning tank 101.

On both outer side surfaces of the cleaning tank 101 thus constructed, a slide rail 120 and a roller 121 for movably installing in the curse 102 are kicked.

The case 102 is formed by bending a steel plate into a substantially U shape so as to open in the front-rear direction and the upward direction, and both upper open edges are bent to the inner surface to form an eaves 102a. The upper open surface is closed by abutting and screwing the upper surface of the edge of the seal top surface 122 on the inner surface of the eaves 102a (the lower surface of the eaves 102a). In addition, the upper part of the open side on the rear side is configured such that an auxiliary plate (not shown) made of a steel plate whose upper edge is bent inward is pressed from the outside so that the case 10 is pressed.
2 and the sealing top plate 122 are screwed to be reinforced.

A fixed rail 123 and a roller, which are combined with the slide rail 120 and the roller 121 of the cleaning tank 101, are attached to the inner surfaces of both sides.

As shown in FIGS. 6 to 8, the seal for preventing water leakage from the cleaning tank 101 is the outer peripheral edge portion of the seal top plate 122 which is pressed by the eaves 102a formed by bending the upper open edge of the case 102 inward. An annular hollow packing 119 is provided on the inner side (lower surface) of the cleaning tank 101 so as to face the packing abutment collar 1b formed all around the upper end of the cleaning tank 101, and pressurized air is sent to the hollow packing 119 by an air pump to inflate it. The packing 119 swelled by the cleaning tank 10
The first packing abutment collar 1b and the sealing top plate 122 are elastically abutted (elastically attached) to realize a stable seal.

The sealing top plate 122 is formed by resin molding, and an annular packing storage groove 12 is formed inside the outer peripheral edge portion.
2a is formed so as to open downward, and at the bottom of the packing storage groove 122a, a mounting groove 122b protruding from the upper side wall of the hollow packing 119 and fitted and fitted with the elastic landing portion 119a, and the hollow packing 119. Air supply / exhaust port window 122 exposing the air supply / exhaust port 119c formed in the upper side wall
c is provided. At the upper side of the air supply / exhaust port window 122c, the sideways joint groove 12 that opens to the end surface of the seal top plate 122 is provided.
2b are installed in series. Air supply / exhaust port 11 of hollow packing 119
9c is connected to the air supply / exhaust pipe 124 by inserting one side of the L-shaped joint 125 into the air supply / exhaust port 119c to connect to the hollow packing 119, and connecting the other side to the air supply / exhaust port pipe 12.
Plug in 4 to realize. This connection is a joint 125,
Connect the air supply / exhaust pipe 124 to the air supply / exhaust port window 122c and the joint groove 1
It is realized by arranging it so that it is housed inside 22d, and the seal top plate 1
The joint 125 and the air supply / exhaust pipe 124 are configured so as not to project on the upper surface of 22.

Here, the standard course of the washing and drying process of the dishwasher of the present invention will be described with reference to FIGS. 2 and 3. The dirty dishes are placed on the table, the detergent is put into the washing tank, and the switch of the operation panel 104 is pushed to wash the dishes by the control substrate 301, and the operation is performed up to the drying process. First, air is sent from the air pump 162 into the hollow packing 119, and the gap between the inflating seal top plate 122 and the cleaning tank 101 is eliminated and water sealing is performed. Next, the brushless motor 106 is energized, and the drain pump blade 113
Is rotated in the reverse direction to drain water when water is contained in the cleaning tank 101. Next, the water supply valve 302 is energized to supply water. Water flows into the cleaning tank through the discharge port 304 below the cleaning tank 101. The water that has flowed in is made to flow to the lower surface of the nozzle arm 110 by a water level sensor 306 that sets the water level position based on the temperature difference. The amount of water is about 3.2 liters. After the inflow, the brushless motor 106 is energized, the cleaning pump blade 107 is normally rotated, and the water in the cleaning tank is flowed through the inside of the nozzle arm 110 from below the cleaning liquid suction guide 109 to be sprayed from the cleaning spray hole 110b to wash the dishes. The water temperature is raised to about 65 ° C. by the sheath heater 112 during cleaning. After the completion of washing, the steps of draining water, supplying water, and washing for about 2 to 3 minutes are repeated three times to form a water rinsing step. afterwards,
Rinse with warm water (heating). Hot water rinse temperature is 7
It is controlled at 0 ° C or higher. In careful cause, it is heated up to about 80 ° C. Then, after draining, a drying process is started.
During drying, the sheathed heater 112 is turned on and off intermittently.
Then, while controlling the temperature, the air blower 117 is driven, and air is applied to the sheath heater from below the partition plate 111, and through the many holes of the partition plate 111, the cleaning tank 110 is washed.
The inner tableware is blown with warm air and put out through the exhaust window 101a. The process time of the standard course is about 90 minutes (wash 25
Minutes, water rinse 12 minutes, warm water rinse 22 minutes, dry 30 minutes)
Is.

[0022]

As described above, according to the present invention having the above structure, a thin blower fan can be used and the cost can be reduced by providing a plurality of shutters in the ventilation path of the blower. In addition, since the invasion of steam can be completely prevented, it is possible to prevent the intrusion of water droplets into the motor board and the invasion of water droplets into the motor shaft, and it is possible to provide a highly reliable one in terms of safety. In addition, the length of the pipeline is 1
It was possible to shorten to about / 3, the pipe line resistance could be greatly reduced, the exhaust air volume could be increased by about 1.5 times, and good drying performance could be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a system kitchen incorporating a dishwasher according to the present invention.

FIG. 2 is a cross-sectional front view of the dish washing tank unit according to the present invention.

FIG. 3 is a vertical cross-sectional front view of the dish washing tank unit according to the present invention.

FIG. 4 is a plan view showing a state in which an upper-stage dishwashing tank unit shown in FIG. 1 is pulled out.

5 is a plan view showing a state in which the lower dishwashing tank unit of the dishwasher shown in FIG. 1 is pulled out. FIG.

FIG. 6 is a vertical cross-sectional front view showing an enlarged seal portion for preventing water leakage from the cleaning tank.

FIG. 7 is a vertical cross-sectional front view showing an enlarged air supply / exhaust connection part of a seal part for preventing water leakage from a cleaning tank.

FIG. 8 is a perspective view showing an arrangement configuration of a blower device with an operation panel removed.

FIG. 9 is an enlarged perspective view showing an air blower provided with a shutter of the present invention.

[Explanation of symbols]

300 ... System kitchen, 200 ... Dishwashing and washing tank unit, 100 ... Dishwashing and washing tank unit, 101 ... Washing tank, 101a ... Exhaust window, 101b ... Packing abutment collar,
101d ... Exhaust port, 102 ... Case, 102a ... Eaves, 1
03 ... Front panel, 104 ... Operation panel, 105 ... Operation panel, 106 ... Brushless motor, 107 ... Washing pump blade, 108 ... Water reservoir, 109 ... Washing liquid suction guide,
110 ... Nozzle arm, 110a ... Water inlet, 110b ...
Cleaning injection hole, 110c ... Guide, 110d ... Hole, 111
... partition plate, 112 ... sheath heater, 113 ... drainage pump blade, 114 ... drainage pump case, 114c ... air vent, 114b ... drainage port, 114a ... water intake, 115 ... drainage hose, 116 ... air venting hose, 117 ... Blower,
118 ... Tableware placed, 119 ... Hollow packing, 11
9a ... Elastic landing portion, 120 ... Slide rail, 121 ... Roller, 122 ... Seal top plate, 122a ... Packing storage groove, 122b ... Mounting groove, 122c ... Air supply / exhaust window, 12
3 ... Fixed rail, 124 ... Air supply / exhaust pipe, 125 ... Joint, 162 ... Air pump, 310 ... Water drop, 308 ... Blower motor, 312 ... Net, 314 ... Fan, 316 ... Blower fan, 318 ... Upper shutter, 318a ... Resin , 31
8b ... Soft member, 320 ... Lower shutter, 322 ... Press guide, 324 ... Claw.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takashi Tomita             1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture             Inside the ceremony company Hitachi Taga Electronics (72) Inventor Dr. Ogawa             1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture             Inside the ceremony company Hitachi Taga Electronics (72) Inventor Tomohiro Okawa             1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture             Inside the ceremony company Hitachi Taga Electronics (72) Inventor Koichi Sakizaki             1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture             Inside the ceremony company Hitachi Taga Electronics F-term (reference) 3B060 GC01                 3B082 BA04 BB02 BF01 BF04 BF05                       EE02

Claims (6)

[Claims] 1. A tableware storage tank, a main body which stores the tableware storage tank so that the tableware storage tank can be pulled out, and which covers the tableware storage tank from the outside to form an outer shell, pressurized water supply means for washing the tableware, and water to hot water. Instead, it has a heater for raising the temperature in the tableware storage tank, and a drainage pump for discharging the wash water in the tableware storage tank to the outside of the machine, for washing the dishes, rinsing with water, rinsing with warm water, and drying. A dishwasher comprising a system kitchen type dishwasher equipped with a control device for executing each step, wherein a shutter that is closed by its own weight is provided near the outlet of the blower. 2. The air blower according to claim 1, wherein the air blower is inclined or the air outlet is inclined, and when the shutter is closed by its own weight, the air outlet of the air blower is completely closed by the shutter. And a dishwasher. 3. The dishwasher according to claim 1, wherein the shutter is made of a soft material and is opened and closed by 2/3 or more when blowing air. 4. The shutter according to claim 1, wherein the shutter is made of a combination of a thin resin such as a Mylar sheet and a soft member, and is sealed to prevent steam and the like from entering the fan motor when the fan is stopped. Dishwasher to do. 5. The soft member according to claim 1, wherein a soft member is provided on the outer periphery of the fan casing portion of the air outlet, and the shutter is made of a plastic member so that the soft member comes into contact with the plastic member when the fan is stopped. dishwasher. 6. The outer peripheral surface of claim 1, wherein two or more shutters are provided in the duct including the air blower and the duct, and either one of the shutters or an outer peripheral surface of a counterpart component with which the shutter comes into contact. A dishwasher characterized by having a soft member vapor barrier function.