JP2003180594A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a dishwasher with double washing compartment at a low cost. <P>SOLUTION: The dishwasher with double washing compartment is composed by vertically stacking and connecting the two similarly composed dish washing compartment units 100 and 200. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a dishwasher.

[0002]

2. Description of the Related Art A small-capacity dishwasher having a built-in one-step washing tank that can be moved forward and backward (withdrawal, push-in) and a large-capacity dishwasher having two washing tanks inside the case. Is proposed. The small capacity dishwasher
Suitable for small families, large capacity dishwashers are suitable for large families or for using the lower tub to wash utensils and separate dishes.

[0003]

These two types of dishwashers are manufactured and sold separately, and in particular, in the installation form incorporated in the system kitchen, each is designed and manufactured so as to be matched with the system kitchen. Since it is necessary to do so, the cost is high. It is an object of the present invention to configure a large-capacity dishwasher having two upper and lower washing tubs so that the dishwasher can be adapted to various system kitchens at low cost. Yet another object of the invention is to provide a positive seal with hollow air packing. Still another object of the present invention is to sanitize the water supply system for the upper and lower two-stage cleaning tanks.

[0004]

According to the present invention, a cleaning tank for injecting a cleaning liquid from a nozzle toward a housed tableware or cooking utensil to wash them is installed in two upper and lower stages so as to be able to move forward and backward in a frame, and water supply and drainage are performed. And a dishwasher equipped with a control device for controlling the injection of the washing liquid from the nozzle, wherein the upper and lower two-stage washing tanks are two dishwashers configured such that the respective washing tanks are incorporated in respective cases so as to be able to move forward and backward. The tank units are stacked in two steps so that the cases abut on each other, and both cases are connected to each other. The dish washing tank units in each step are formed into a substantially U-shaped steel plate so that the dish washing tank units are open in the front-rear direction and the upper direction. To form the case, the upper end of the seal top plate is abutted to the lower surface of the eaves formed by bending both upper open edges of the case inward, and screwed to close the upper direction, The annular hollow packing attached to the lower surface of the peripheral edge of the sealing top plate is made to face the packing contact flange formed on the upper edge of the cleaning tank to inflate the hollow packing between the seal top plate and the packing contact flange. The hollow packing is configured to press against the packing abutment collar and the sealing top plate to realize a seal, and the sealing top plate exposes the air supply / exhaust port formed on the upper side wall of the hollow packing to the upper surface. An air supply / exhaust port window to be opened and a horizontal joint groove opened from the upper side of the air supply / exhaust port window to the end surface of the seal top plate are provided. It is characterized in that it is inserted into the air supply / exhaust port of and the other side is connected to an L-shaped joint laid in the joint groove.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a dishwasher incorporated in a system kitchen. The dishwasher in this embodiment has two dishwasher tank units 100,
This is an installation form in which 200 are assembled in the system kitchen 300 in a state of being combined so as to be stacked vertically in two stages.

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

The dishwashing tank unit 100 accommodates a drawer-type washing tank 101 in a case 102 constituting a frame so that the dishwasher 101 can be moved forward and backward. (Wash, rinse, dry). The front panel 103 provided on the front side surface of the cleaning tank 101 includes an operation panel 104 provided on the front edge side surface of the front panel 103 and an operation panel 105 provided on the upper end surface.

Two dishwasher units 100, 200
The upper and lower two-tier stacking is the dishwasher tank unit 2 in the lower
No. 00 case 102 is combined and joined so that the lower end surface of the case 102 of the upper dish washing tank unit 100 comes into contact with the upper end surface of the case 102.

The overall structure of the dishwashing tank unit 100 will be described with reference to FIGS. The cleaning tank 101 for storing dishes is formed by resin molding into a box shape with an open upper side. A flat brushless motor 106 is attached to the outside of the bottom wall of the cleaning tank 101, and the inner end portion of the rotating shaft of the brushless motor 106 penetrates the bottom wall of the cleaning tank 101 and projects into the cleaning tank 101. 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. The suction guide 109 is provided so that the suction force of the cleaning pump blade 107 can be efficiently applied to the cleaning liquid in the water reservoir 108. The nozzle arm 110 has a water inlet 110a formed at the center thereof, which is the cleaning pump blade 10 described above.
The cleaning liquid suction guide 109 is rotatably fitted so as to surround the discharge port 7 and receive the cleaning liquid discharged from the cleaning pump blade 107. The nozzle arm 110 is
The cleaning liquid received from the cleaning pump blade 107 is sprayed obliquely upward from the cleaning spray hole 110b provided on the upper surface of the nozzle arm 110, and is rotated by the flow of the cleaning liquid received from the cleaning pump blade 107 and the reaction force of the spray.

Cleaning liquid suction guide 109 and nozzle arm 1
A partition plate 111 with a filter mesh for partitioning the bottom of the cleaning tank 101 into upper and lower parts is installed between the 10 and 10.
A residue put filter 112 is detachably attached to one corner of the corner, and a substantially annular sheathed heater 113 is installed on the back side (lower side) of the partition plate 111.

A drain pump vane 114 is fitted on the outer end of the rotary shaft of the brushless motor 106, and a drain pump case 115 surrounding the drain pump vane 114 is attached. The drainage pump case 115 includes the cleaning tank 1
Water inlet 115a connected to the bottom of 01 and the drain hose 1
16 and a drain port 115b for connecting an air vent hose 117 to the inside of the cleaning tank 101 so as to open in the cleaning tank 101.
15c is provided.

The drainage pump blade 115 does not exhibit a drainage pump function when the brushless motor 106 is normally rotated (washing mode), but exhibits a drainage pump function when it is reversely rotated (drainage mode). To do.

Outside the front side wall of the cleaning tank 101, a drying air supply fan 11 for blowing drying air into the cleaning tank 101 is provided.
8 is installed, and dry air is blown into the bottom of the cleaning tank 101 through the blower cover 119 to circulate it. Cleaning tank 101
The moist air inside is exhausted from the exhaust hole 101a formed in the side wall.

The front panel 103, which covers the outside of the front side wall of the cleaning tank 101, has the control processing device 120 mounted inside thereof, and the mounting flanges 101b at both front ends of the cleaning tank 101.
Front panel substrate 121 that is screwed to the operation panel substrate 12 that is attached to the upper edge of the front panel substrate 121.
2 and a support frame 123 attached to both side edges and a lower edge of the front panel substrate 121 and for sandwiching a decorative panel (not shown) on the front side of the front panel substrate 121 in cooperation with the operation panel substrate 122. The operation panel substrate 122 includes the operation panels 104 and 105 and an exhaust window 124. The exhaust window 124 and the exhaust hole 101a are attached to the side surface of the cleaning tank 101 in an airtight state through a packing so as to surround the exhaust hole 101a.
And the cleaning tank 10 so as to communicate with the exhaust cover 125.
1, an exhaust passage 101c formed on the front surface of the connecting duct 1
It communicates through 26. The exhaust passage from the exhaust hole 101a to the exhaust window 123 is configured such that the exhaust hole 101a side is gradually lowered so that water droplets condensed on the wall surface of the passage flow into the cleaning tank 101 from the exhaust hole 101a.

A lower cover 127 is attached and covered on the lower side of the cleaning tank 101 constructed as described above.

Further, in the cleaning tank 101, a tableware placing table 128 is installed so as to be located above the nozzle arm 110. In the tableware washing tank unit 200 located in the lower stage, the tableware placing table 128 is configured such that the cooking utensil placing table can be selectively installed for each tableware placing. As shown in FIG. 6, the tableware placing table is configured to be suitable for placing tableware such as bowls, plates and cups. It is configured to be suitable for placing tableware and cooking utensils such as pots and balls side by side.

A packing contact collar 101d for contacting and sealing the hollow packing 129 is formed on the entire circumference of the upper edge of the cleaning tank 101.

Slide rails 130 and rollers 131, which are installed in the case 102 so as to be able to move forward and backward, are attached to both outer side surfaces of the cleaning tank 101 thus configured.

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 inward to form an eaves 102a. The upper open surface is closed by abutting the upper surface of the edge portion of the seal top plate 132 against the inner side of the eaves 102a (the lower surface of the eaves 102a) and screwing. Further, the upper part of the open side on the rear side is screwed to the case 102 and the seal top plate 132 so that the auxiliary pad plate 133 made of a steel plate having the eaves 133a formed by bending the upper edge inward is pressed and pressed from the outside. And reinforce. In this way, the frame body in this embodiment is mainly configured by connecting the case 102, the seal top plate 132, and the auxiliary pad plate 133.

In the lower dish washing tank unit 200, the eaves 102a of the case 102 and the eaves 133 of the auxiliary pad plate 133 are used.
The a also functions as a contact surface on which the lower end surface of the case 102 of the upper dish washing tank unit 100 is placed when the upper dish washing tank units 100 are stacked and joined.

Fixed rails 134 and rollers 135 combined with the slide rails 130 and rollers 131 of the cleaning tank 101 are attached to the inner surfaces of both sides of the case 102.

Further, connecting plate abutment seats 102b and 102c are formed on the upper and lower edges of both sides of the case 102. The connecting plate abutment seats 102b, 102c are used to stack the two dishwashing tank units 100, 200 on top of each other to form a two-stage structure dishwasher, and thus the upper edge of the case 102 of the lower dishwashing tank unit 200. The upper and lower cases 102 are connected by abutting and screwing the connecting plate abutment seat 102b of the above portion and the connecting plate 136 across the connecting plate abutment seat 102c of the lower edge portion of the case 102 of the upper dish washing tank unit 100. Use as you would.

Further, the left and right front edges of the case 102 are
The reinforcing frame 137 is abutted and screwed to reinforce and blind, and leg mounting holes 102d into which height adjusting screw legs 138 are fitted are provided at four corners of the bottom surface.

The seal for preventing water leakage from the cleaning tank 101 is
As shown in FIGS. 5 and 8 to 10, both lateral edge portions are pressed by the eaves 102a of the case 102, and the rear edge portions thereof are pressed by the eaves 133a of the auxiliary contact plate 133 and screwed to the front end surface. The packing contact flange 101d formed on the entire upper circumference of the cleaning tank 101 is opposed to the inside (lower surface) of the outer peripheral edge of the sealing top plate 132 reinforced by the auxiliary contact plate 139 that is in contact with the upper surface of the front edge. As described above, the annular hollow packing 129 is provided, and compressed air is sent from the air pump unit 140 to the hollow packing 129 via the air supply / exhaust hose 141 to expand the hollow packing 129 and the packing contact flange 101d of the cleaning tank 101. The seal top plates 132 are elastically abutted (elastically attached) to realize a stable seal.

The seal top plate 132 is formed by resin molding, and an annular packing storage groove 1 is formed inside the outer peripheral edge portion.
32a is formed so as to open downward, and a mounting groove 132b to which a projecting portion 129a protruding from the upper wall of the hollow packing 129 is fitted and attached to the bottom of the packing storage groove 132a, and a sealing top plate 132. An air supply / exhaust port window 132c for exposing the air supply / exhaust port 129c formed on the upper wall of the hollow packing 129 located at the rear edge portion is provided. A seal top plate 132 is provided on the upper side of the air supply / exhaust port window 132c.
A laterally extending joint groove 132d that opens is continuously provided on the end face. To connect the air supply / exhaust hose 141 to the air supply / exhaust port 129c of the hollow packing 129, one side of the L-shaped joint 143 is inserted into the air supply / exhaust port 129c to be connected to the hollow packing 129, and the other side is inserted into the air supply / exhaust hose 114. Will be realized in. This connection is realized by arranging the joint 143 and the air supply / exhaust hose 141 so as to be housed in the air supply / exhaust port window 132c and the joint groove 132d, and the joint 143 and the air supply / exhaust hose 141 do not project on the upper surface of the seal top plate 132. To configure.

Eaves 102a of case 102, auxiliary pad 1
The eaves 133a and the auxiliary contact plate 139 of 33 are hollow because they extend to the upper surface of the peripheral edge of the seal top plate 132 so that the packing storage groove 132a in the peripheral edge part of the seal top plate 132 is located therebelow. When the packing 129 expands and is elastically attached (pressed) to the packing abutment collar 101d of the cleaning tank 101, the reaction force exerted to prevent the seal top plate 132 from rising and to realize a reliable seal.
Further, the upper side wall of the case 102, the eaves 102 a, the upper side wall of the auxiliary backing plate 133, the eaves 133 a, and the auxiliary backing plate 13 are attached.
9 has the same function as the L-shaped steel material, so the sealing top plate 13
The structure in which 2 is abutted on these lower surfaces and screwed together,
The seal top plate 132 functions to correct the distortion of the seal top plate 132, and the seal top plate 132 also functions as a member for preventing the open portion of the case 102 from collapsing.

As shown in FIGS. 11 and 12, the water supply control to the washing tubs 101 of the dish washing tub units 100 and 200 in the dish washing machine constructed by stacking such dish washing tub units in the upper and lower two stages is as follows. It is configured to be performed by the dual water supply solenoid valve unit 144 attached to the auxiliary contact plate 133 screwed to the rear side of the case 102 of the upper dish washing tank unit 100.

This two-way water supply solenoid valve unit 144 connects a water supply connection hose 145 to the water inlet 144a, and supplies water from the first water supply solenoid valve 144b to the lower part of the upper cleaning tank 101 via the tank water supply hose 146. , Second water supply solenoid valve 1
Water is supplied from 44c to the relay joint 148 attached to the auxiliary backing plate 133 screwed to the rear side of the case 102 of the lower dish washing tank unit 200 via the relay hose 147, and the tank water supply hose 149 is further supplied from the relay joint 148.
Water is supplied to the lower portion of the lower cleaning tank 101 via the. In this way, the auxiliary contact plates 13 of the case 102 of the upper dish washing tank unit 100 are arranged so that the water supply solenoid valves 144b and 144c are positioned higher than the cleaning tanks 101.
The configuration installed in No. 3 functions to prevent the cleaning liquid in each cleaning tank 101 from flowing backward to the tank water supply hoses 146 and 149 and remaining there to become unsanitary.

These dish washing tank units 100, 20
0 includes a control device 150 as shown in FIG. This control device 150 is used for the dish washing tank unit 100 in the upper stage.
Control system 1 for executing the conventional dishwashing control in
51 and a control system 152 for executing cooking utensil or dish washing control in the lower dish washing tank unit 200. Since the respective control systems 151 and 152 have the same configuration centering on the microcomputers 153 and 154, respectively, the control system 151 will be described here.

The microcomputer 153 executes a program stored in the memory 156 and executes cleaning control according to an operation input from the operation panel switch group 155 which is a switch of the operation panels 104 and 105. The microcomputer 153 and the memory 156 constitute the control processing device 120 in this embodiment.

The microcomputer 153 has a water level sensor 157 for detecting the water level of the cleaning liquid, a door sensor 158,
An air pump unit 140 for inputting detection signals from the hollow packing air pressure sensor 159, a water temperature sensor 160 for detecting the temperature of the cleaning liquid, and a heater overheat sensor 161, and controlling air supply and exhaust to the hollow packing 129, and a water supply solenoid valve 144. (144b, 144c), the sheath heater 113, the brushless motor 106, the dry air supply fan 118, and the operation panels 104, 10.
5 controls the display 164 and the buzzer 165 provided in the No. 5.

The hollow packing air pressure sensor 159 in this embodiment has such an accuracy as to detect whether the air pressure is at the minimum level (whether the air pump unit 140 is functioning normally). This is the configuration, and in practice, the one incorporated in the air pump unit 140 is used. Although not shown in the drawings, the air pump unit 140 includes an air pump, an exhaust solenoid valve, and the hollow packing air pressure sensor 15.
9 is provided.

FIG. 14 shows the upper dishwashing tank unit 10
The operation panel 104 and the operation panel 105 attached to the cleaning tank 101 of No. 0 are shown.

The operation panel 104 includes a power switch (button) 155a and a start / pause switch (button).
155b and child lock switch (button) 155
c and a display element group 164a. Operation panel 105
Is a course setting switch (button) 155d, a non-drying switch (button) 155e, and a reservation switch (button)
155f and the display element group 164b are provided.

FIG. 15 shows the lower dish washing tank unit 20.
The operation panel 104 and the operation panel 105 attached to the cleaning tank 101 of No. 0 are shown.

The operation panel 104 has a power switch (button) 155g and a start / pause switch (button).
155h and child lock switch (button) 155
i and a display element group 164c. Operation panel 105
Includes a course setting switch (button) 155j, a non-drying switch (button) 155k, and a display element group 164d.

The microcomputer 153 in the control system 151 of the upper dish washing tank unit 100 is shown in FIG.
The dishwashing control as shown in is executed.

Step S11 When the power switch 155a is input, the operation panel 10
The course is set based on the input from the course setting switch 155d.

Step S12 When the start / pause switch 155b is input,
The water supply solenoid valve 144b is opened to supply water up to a predetermined water level in the cleaning tank 101, and the brushless motor 106 is operated in the forward rotation (cleaning mode) to rotate the cleaning pump blades 107 to store the water in the cleaning tank 101. The cleaning liquid is sucked up from the portion 108 and supplied to the nozzle arm 110, and is sprayed from the cleaning spray 110b toward the dish placement table 128 to perform dishwashing and cooking utensil washing. The cleaning liquid is energized to heat the sheathed heater 113 as needed. When the washing is completed, the brushless motor 106 is rotated in the reverse direction (drainage mode) so that the drainage pump blade 114 functions and the washing tank 1
Drain the cleaning liquid in 01.

Step S13: The water supply solenoid valve 144b is opened to supply the rinsing water to the predetermined water level in the cleaning tank 101, and the brushless motor 106 is controlled to rotate the cleaning pump blade 107 in the cleaning mode for rinsing the water. , Rotate in drainage mode to drain.

Step S14: The water supply solenoid valve 144b is opened to supply the rinse water up to a predetermined water level, the sheath heater 113 is energized to heat the rinse water, and the brushless motor 106 is controlled to rotate the cleaning pump blade 107 in the cleaning mode. To rinse with warm water, then rotate in drain mode to drain.

Step S15: Air is supplied into the cleaning tank 101 by the dry air supply fan 118,
The sheath heater 113 is used to heat and dry with warm air. The air supplied into the cleaning tank 101 uses the sheathed heater 113.
It is circulated in the washing tank 101 while being heated by, to evaporate water droplets and water adhering to the dishes, the washing tank 101, the basket 128, the seal top plate 132, etc.
Through the exhaust cover 125, the exhaust passage 101c, the connecting duct 126, and the exhaust window 124.

At the end of the drying, the sheath heater 113 is shut off and the cooling operation is performed.

The microcomputer 154 in the control system 152 of the lower tableware washing tank unit 200 is shown in FIG.
The cooking appliance washing control as shown in is executed.

Step S21 When the power switch 155g is input, it is confirmed whether the washing mode is set to the cooking utensil washing mode or the dish washing mode. This washing mode is preset by the course setting switch 155j,
Here, it is assumed that the cooking utensil washing mode is set.

Step S22 The course is set based on the input from the course setting switch 155j on the operation panel 105.

Step S23 When the start / pause switch 155h is input,
The water supply solenoid valve 144c is opened to supply water up to a predetermined water level in the cleaning tank 101, and the upper dishwashing tank unit 100 is washed.
Wait until the cleaning in is completed. During the waiting period,
The cleaning liquid is sprayed every predetermined time (5 minutes in this embodiment) to prevent the stains on the cooking utensils from drying and sticking.

Then, the upper dish washing tank unit 100
When the cleaning is completed, the sheath heater 113 is energized to heat the cleaning liquid and the brushless motor 106 is intermittently operated in the forward rotation (cleaning mode) to drive the cleaning pump blade 1.
By intermittently rotating 07, the cleaning liquid is sucked up from the water reservoir 108 of the cleaning tank 101 and the nozzle arm 11
0, and place the dishes on the dish through the cleaning spray hole 110b.
8 is intermittently jetted to perform cooking utensil washing.

In order to suppress the foaming phenomenon caused by a large amount of detergent added to wash the cooking utensils, the intermittent jetting of the cleaning liquid is carried out while the temperature of the cleaning liquid is in a temperature state where foaming is likely to occur (as shown in FIG. 18). (In this embodiment, less than 45 ° C.)
Then, the injection time is shortened (in this embodiment, jetted for 2 minutes / stopped for 3 minutes) and repeated, and at a temperature higher than that,
Long jetting time (3 minutes jetting / 2 in this embodiment)
Stop for a minute) and repeat. When a predetermined washing time (60 minutes in this embodiment) has elapsed, the washing liquid is drained and the washing process is completed.

When the washing is completed, the brushless motor 10
6 as reverse rotation (drainage mode) drainage pump blade 114
To drain the cleaning liquid in the cleaning tank 101.

Step S24: The water supply solenoid valve 144c is opened to supply the rinse water to the predetermined water level in the cleaning tank 101, and the brushless motor 106 is controlled to rotate the cleaning pump blades 107 in the cleaning mode to rinse the water. Rotate in mode to drain.

Step S25: The water supply solenoid valve 144c is opened to supply the rinse water to the predetermined water level in the cleaning tank 101, the sheath heater 113 is energized to heat the rinse water, and the brushless motor 106 is controlled to control the cleaning pump blade 107. Rotate in wash mode to rinse with warm water and rotate in drain mode to drain.

Step S26 Air is supplied by the dry air supply fan 118, and the sheath heater 11 is supplied.
The heating operation is carried out by heating at 8, and the warm air drying operation is performed, and then the cooling operation is performed.

The lower dishwashing tank unit 200 is
When set to the dishwashing mode, the control system 152 executes a control process for performing the same dishwashing process as the control system 151 of the upper dishwashing tank unit 100 described above.

Therefore, the lower dish washing tank unit 200
Microcomputer 1 in control system 152 in
54 confirms the washing mode setting information and selects the washing control process in the cooking utensil washing mode or the dish washing mode according to the set washing mode.

Any of the dish washing tank units 100, 200
Also in the washing, rinsing and drying process, the door sensor 1
It is necessary to check 58 to make sure that the dishwashing tank 101 is pushed into the case 102. Also, by controlling the air pump unit 140 to supply air to the hollow packing 129, the hollow It is necessary to inflate the packing 129 for sealing. Air pump unit 140 in this embodiment
Uses a hollow packing 129, an air supply / exhaust hose 141, a joint 143 itself, and an air pump having a maximum air supply capacity equal to or lower than the pressure resistance of its connecting portion, and performs air supply control necessary for sealing by the hollow packing 129 by managing the air pump operating time. To do.

FIG. 19 shows a microcomputer 153.
15 is a flowchart of hollow packing air supply control executed by 154.

Step S31: It is checked whether or not the operation is started by the input of the start / temporary stop switches 155b and 155h, and the process is branched.

Step S32 If the operation is started, the air pump in the air pump unit 140 is operated to supply air to the hollow packing 129.

Step S33 The air supply operation at the start of the operation is continued for a long time (20 seconds in this embodiment) because a large amount of air supply is required.

Step S34 The pressure sensor 159 in the air pump unit 140 is checked to confirm that the necessary air supply is being performed.

Step S35: It is confirmed whether the elapsed time from the previous air supply operation is a predetermined time. This predetermined time is an air supply (replenishment) operation interval in which air is regularly supplemented to prevent the hollow packing 129 from shrinking due to air leakage during cleaning operation and the sealing performance being deteriorated. , Set to 20 seconds.

Step S36 When the predetermined time has passed, the air pump in the air pump unit 140 is operated to supply air to the hollow packing 129.

Step S37 Since this air supply operation is for replenishing air leakage, it is operated for a short time (5 seconds in this embodiment).

Step S38 The pressure sensor 159 in the air pump unit 140 is checked to confirm that air is being supplied.

Step S39 It is confirmed whether or not water has been supplied even if the elapsed time is within the predetermined time. When the water is supplied, the temperature of the cleaning tank 101 is lowered, so that the temperature of the hollow packing 129 is also lowered and the pressure in the hollow packing 129 is lowered. Therefore, when the water supply is completed, the process proceeds to step S36 and the air pump unit 140 is operated.
The inner air pump is operated to supply air to the hollow packing 129.

This dishwasher uses hot water or detergent to wash with warm water, rinse with warm water, and dry with warm air, so that the washing tank 101 should not be pulled out during operation (child lock). is necessary. This child lock is configured to be easily realized by maintaining the air pressure in the hollow packing 129 so that the hollow packing 129 swells and comes into pressure contact with the packing abutment collar 101d to be in a sealed state.

FIG. 20 shows a microcomputer 153.
154 is a flowchart of child lock setting and release control executed by 154.

Step S41 Child lock switch 155 of operation panel 104
If the on state of c and 155i continues for a predetermined time (3 seconds in this embodiment), the child lock setting / releasing process is performed.

Step S42 It is confirmed whether the child lock is already set or not, and the process is branched. The child lock information is stored in the child lock information area of the memory 156.

Step S43 When the child lock is not set in the child lock information area of the memory 156, the child lock setting information is generated.

Step S44 When the child lock is set in the child lock information area of the memory 156, the child lock release information is generated.

Step S45 The child lock setting information or release information is stored in the memory 15
The child lock information area 6 is stored.

During the washing operation, the power switch 155a,
155g and start / pause switch 155b, 15
The control process when 5h is pressed will be described with reference to FIG. This operation typically occurs when adding or removing dishes or utensils to be shut down or washed.

Step S51 Input from the operation panel switch group 155 is monitored.

Step S52 The control process corresponding to the input operation panel switch group 155 is executed.

Step S53 Check the child lock information and branch the control processing.

Step S54 When the child lock is not set, the exhaust solenoid valve in the air pump unit 140 is opened to exhaust the air in the hollow packing 129 to deflate the hollow packing 129 and release the seal. Cleaning tank 101
It enables the operation of pulling out. When the child lock is set, the sealed state is maintained without exhausting the air in the hollow packing 129, and the pulling operation of the cleaning tank 101 is maintained in the impossible (prevented) state.

A control process for bringing the cleaning tank 101 into the drawable state when the child lock is temporarily stopped will be described with reference to FIG.

Step S61: A predetermined operation panel switch group 155, in this embodiment, the child lock switch 155c or 155i of the operation panel 104 and the power switch 155a or 155g are simultaneously turned on for a predetermined time (in this embodiment, If it continues for 3 seconds, the set child lock temporary release processing (release until restart of operation) is performed.

Step S62 When the child lock is temporarily released, the exhaust solenoid valve in the air pump unit 140 is opened to open the hollow packing 12
By exhausting the air inside the hollow packing 12
9 is deflated and the seal is released so that the cleaning tank 101 can be pulled out.

Regarding the air supply control processing to the hollow packing 129 when returning from the temporary stop state to the operating state, FIG.
This will be described with reference to FIG. This control process is performed when the start / pause switch 155b, 1
Executed when 55h is input.

Step S71 The control process is branched after confirming whether the child lock information is set and temporarily released.

Step S72 Since the hollow packing 129 is exhausted when the child lock information is not set or is temporarily released, the air pump in the air pump unit 140 is operated to supply air to the hollow packing 129. The hollow packing 129 is inflated to restore the sealed state.

Step S73 Return to the point of suspension and restart the dishwashing operation.

[0086]

The dishwasher having the two-stage washing tank structure of the present invention is excellent in conformity to various system kitchens because the two dishwashing tank units having the same structure are vertically stacked. It is excellent in productivity and can be realized at low cost.

Further, the hollow packing for sealing the opening of the cleaning tank is installed below the peripheral portion of the sealing top plate reinforced by the eaves of the case and the auxiliary pad, so that the rising of the sealing top plate can be suppressed and the sealing can be reliably performed. It is possible to realize a perfect seal.

Further, the water supply system is configured so that water is supplied to both washing tanks from a high position by a dual water supply solenoid valve unit attached to an auxiliary pad plate that reinforces the rear open side of the case of the upper dish washing tank unit. Therefore, it is possible to prevent the cleaning liquid from flowing backward into the tank water supply hose and remaining there, resulting in unsanitary condition.

[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 vertical cross-sectional front view of the dish washing tank unit according to the present invention.

FIG. 3 is a vertical cross-sectional side view of the dish washing tank unit shown in FIG.

FIG. 4 is an exploded perspective view around a washing tank in the dish washing tank unit according to the present invention.

FIG. 5 is an exploded perspective view around a case in the dish washing tank unit according to the present invention.

FIG. 6 is a plan view showing a state in which an upper-stage dishwashing tank unit of the dishwasher shown in FIG. 1 is pulled out.

FIG. 7 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. 8 is a vertical cross-sectional front view showing an enlarged seal portion for preventing water leakage from the cleaning tank.

FIG. 9 is a vertical cross-sectional side view showing an enlarged supply / exhaust connection portion of a seal portion for preventing water leakage from the cleaning tank.

10 is a plan view of an air supply / exhaust connection portion of the water leakage prevention seal portion shown in FIG. 9. FIG.

FIG. 11 is a side view showing a water supply system of the dishwasher according to the present invention.

FIG. 12 is a rear view showing a water supply system of the dishwasher according to the present invention.

FIG. 13 is a block diagram of the control device of the dishwasher according to the present invention.

FIG. 14 is a development view of an operation panel in the upper dishwashing tank unit of the dishwasher according to the present invention.

FIG. 15 is a development view of an operation panel in the lower dishwashing tank unit of the dishwasher according to the present invention.

FIG. 16 is a flowchart of a dishwashing control process executed by a microcomputer in the upper dishwashing tank unit of the dishwasher according to the present invention.

FIG. 17 is a flowchart of a dishwashing control process executed by a microcomputer in the lower dishwashing tank unit of the dishwasher according to the present invention.

FIG. 18 is a characteristic diagram of foaming prevention control executed by the dishwasher controller according to the present invention in cooking utensil washing control.

FIG. 19 is a flowchart of hollow packing air supply control processing executed by a microcomputer in the dishwasher according to the present invention.

FIG. 20 is a flowchart of a child lock setting / release control process executed by a microcomputer in the dishwasher according to the present invention.

FIG. 21 is a flowchart of a pause control process executed by a microcomputer in the dishwasher according to the present invention.

FIG. 22 is a flowchart of a child lock temporary release control process executed by a microcomputer in the dishwasher according to the present invention.

FIG. 23 is a flow chart of operation recovery control processing executed by a microcomputer in the dishwasher according to the present invention.

[Explanation of symbols]

100 ... upper dish washing tank unit, 101 ... washing tank,
101a ... Exhaust hole, 101d ... Packing abutment collar, 10
2 ... Case, 102a ... Eaves, 110 ... Nozzle arm, 1
25 ... Exhaust cover, 129 ... Hollow packing, 129c
... air supply / exhaust port, 132 ... seal top plate, 132c ... air supply / exhaust port window, 132d ... joint groove, 133 ... auxiliary pad plate, 133
a ... eaves, 140 ... air pump unit, 141 ... air supply / exhaust hose, 143 ... joint, 144 ... two continuous water supply solenoid valve units, 144b, 144c ... water supply solenoid valve, 150 ... control device, 153, 154 ... microcomputer, 155
b, 155h ... Start / pause switch (button), 155c, 155i ... Child lock switch (button), 200 ... Dishwash tank unit in the lower stage.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Satoshi Miyataka             1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture             Inside the ceremony company Hitachi Taga Electronics (72) Inventor Ryoichi Kobayashi             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 BD04

Claims (4)

[Claims] 1. A cleaning tank for injecting a cleaning liquid from a nozzle toward a stored tableware or cooking utensil to wash the cleaning liquid is installed in two upper and lower stages so that the cleaning liquid can be advanced and retracted in a frame body, and water supply and drainage and injection of the cleaning liquid from the nozzle are performed. In the dishwasher equipped with a control device for controlling the above, the upper and lower two-stage cleaning tanks are configured such that the cleaning tanks are built in the respective cases so that the cleaning tanks can be moved forward and backward, and the two dish cleaning tank units are butted against each other. As shown in the figure, the two cases are stacked one above the other, and the two cases are combined and installed. The dish washing tank units at each step are formed by bending the steel plates into a substantially U shape so that the front and rear directions and the upward direction are opened. , The upper edge of the sealing top plate is abutted against the lower surface of the eaves formed by bending both upper open edges of the case inward to close the upper side by screwing, and the peripheral edge of the sealing top plate The annular hollow packing attached to the lower surface is opposed to the packing abutment flange formed on the upper edge of the cleaning tank, and the hollow packing is inflated between the sealing top plate and the packing abutment flange to pack the hollow packing. The contact top and the sealing top plate are pressed against each other to realize a seal, and the sealing top plate includes an air supply / exhaust port window that exposes the air supply / exhaust port formed on the upper side wall of the hollow packing to the upper surface. The air supply / exhaust hose for the hollow packing is provided with a horizontal joint groove that opens from the upper side of the air supply / exhaust opening window to the end surface of the sealing top plate, and one side is inserted into the air supply / exhaust opening of the hollow packing from the air supply / exhaust opening window. A dishwasher characterized in that an edge is connected to an L-shaped joint laid in the joint groove. 2. The dishwasher according to claim 1, wherein the joint is housed in the joint groove at a height equal to or lower than the upper surface of the seal top plate. 3. The inlet / outlet port window and joint groove according to claim 1, wherein the joint is attached to a case so as to press the rear edge of the seal top plate. A dishwasher, characterized in that it is housed in a space formed by the air supply / exhaust port window and a joint groove between an eave of an auxiliary pad with a canopy and a sealing top plate. 4. The water supply to each cleaning tank according to claim 3,
A dishwasher characterized in that it is configured to perform from each water supply solenoid valve of the double water supply solenoid valve unit attached to the auxiliary pad plate attached to the case of the upper dishwashing tank unit via the tank water supply hose.