JP2567747B2 - Dishwasher - Google Patents

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 A dishwasher / dryer of this type is disclosed in JP-A-60
-48724. This material is connected by waiting straight water absorption tube horizontally provided between the suction side of the water reservoir and Bruno nozzle pump provided in the cavity bottom, at least a portion of the side wall of the intake <br/> water tube Made of translucent material,
A light emitting element and a light receiving element that detect a change in the transmittance of the liquid inside the water absorption tube are arranged therein, and the cleaning, rinsing, draining and drying steps are configured to be controlled by changing the amount of light received by the light receiving element. There is.

[0003]

Generally, in the cavity
There is a dishwasher that drains the washing water of
Te is the washing water in the cavity is somewhat drained by the drain pump, the water level in the cavity is reduced, because the drain pump is no longer drained causing the hair air, waste water
After that, some cleaning water remains on the bottom of the water reservoir. others
Because, when the suction pipe is connected to the bottom of the water reservoir, the wash water no longer draining Ri Tama as residual water in the water pipe,
Water stains adhere to the part formed of the translucent material,
Result, the detection accuracy of the transmittance is decreased, the detection performance of the cleaning state is may become worse. Therefore, in the above conventional example,
Install the connection port (exhaust port) at a position higher than the bottom of the water reservoir.
However, in this case, the bottom of the water reservoir must be deep,
Therefore, the size of the device becomes large. On the other hand, with the water absorption pipe
It is conceivable to provide the connection port above the water reservoir,
By doing this, when water is wavy during cleaning,
Air enters the water pipe, causing the cleaning pump to
However, the injection pressure of the nozzle may decrease.

The present invention solves this problem.

[0005]

Means for Solving the Problems The means of the present invention for solving the above-mentioned problems includes a cavity for storing dishes, a water reservoir provided at the bottom of the cavity, and a bottom of the water reservoir.
A washing pump having a discharge port provided in the suction port , a suction port, and a discharge port, and attached to the outer bottom surface of the cavity; and a nozzle for injecting the washing water sent from the discharge port of the washing pump onto the tableware. A pipe connecting the discharge port of the water reservoir and the suction port of the cleaning pump, and a water passage provided from the discharge port of the water reservoir to the suction port of the cleaning pump, Permeation detection means for detecting the permeability, and drainage for discharging the water in the cavity
In dishwasher comprising a pump, the transmission test
The knowing means bends the water passage so that the water is discharged from the outlet.
Water passage at a high position and after drainage by the drainage pump
The structure is provided at a position exposed from the remaining water .

[0006]

In the above structure, the discharge port is located at the bottom of the water reservoir.
And the transmission detection means is placed at a higher position than the bottom of the water reservoir.
Since it is possible to drain the water with the drain pump,
Even if the washing water remains in the
Absent. Moreover, there is no need to enlarge the water reservoir,
No air is caught in the washing pump during washing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes an opening in the front surface, a cavity for accommodating tableware from the opening, 2 a door for closing the opening of the cavity 1, and 3 a rotatably mounted substantially at the center of the bottom surface of the cavity 1. Nozzle, 4 is cavity 1
And a heater for heating the cleaning water in the cavity 1. Reference numeral 5 denotes a concave portion formed in front of the bottom of the cavity 1 and has a discharge port 6 for discharging the cleaning water from the bottom of the concave portion 5 to the side. Reference numeral 7 denotes a cleaning / draining pump mounted on the outer bottom surface of the cavity 1, and includes a pump casing 11 having a suction port 8, a discharge port 9, and an impeller 10. When the washing / draining pump 7 rotates forward, water is supplied to the nozzle 3 from the discharge port 9 of the pump casing 11 to inject washing water into the dishes in the cavity 1. Drain the washing water outside the machine. Further, a step is provided by setting the position of the suction port 8 of the pump casing 11 to be higher than the discharge port 6 of the recess 5 by about 15 mm. 12 is a pipe made of rubber, which connects the suction port 8 and the discharge port 6,
A filter 3 is provided in the recess 5 and removes the residual food in the wash water. The cleaning / drainage pump 7 has the cleaning pump and the drainage pump integrated in the embodiment, but the present invention is not limited to this, and the cleaning pump and the drainage pump may be provided separately.

Reference numeral 14 denotes an outer tank which covers the cavity 1, and 15 denotes a rear face plate which is attached to the outer tank 14 with a predetermined distance from the rear surface of the cavity 1. The rear plate 15 and the cavity 1
A circulation air passage 17 separated by a double-sided fan 16 between
And a cooling air passage 18 are provided. The circulation air passage 17
Communicates with an exhaust port 19 provided on the upper rear side of the cavity 1 and an intake port 20 on the lower rear side of the cavity 1. The air in the cavity 1 is forced from the exhaust port 19 by a double-sided fan 16 into the circulating air duct 17. The air that has been exhausted to the air and dehumidified by heat exchange with a double-sided fan is again taken into the cavity 1 through the intake port 20.

Reference numeral 22 is a water supply valve provided on the rear surface side of the cavity 1, 23 is a water supply opening provided in the circulating air passage 17 and connected to the water supply valve 22, 24 is a motor for rotationally driving the double-sided fan 16, and 25 is It is a control unit that controls the operation of the dishwasher.

In FIGS. 2 and 3, reference numeral 26 is a connecting portion with the pipe 12 on the suction port 8 side of the pump casing 11, and 27.
Is provided on the left side of the connecting portion 26 toward the suction port 8, and a light emitting portion formed of a transparent member, 28 is provided on the right side of the connecting portion 26 facing the light emitting portion 27, A light receiving / transmitting part formed of a transparent member, 29 is a light emitting element such as a diode, 30 is a light receiving element such as a phototransistor, and 31 is a pump casing 11 for fixing the light emitting element 29 to the light emitting / transmitting part 27 of the connecting part 26. A light emitting element mounting portion 32 is screwed to the pump casing 11 to fix the light receiving element 30 to the light transmitting portion 28. The above-mentioned light emitting / transmitting part 2
7, the light receiving / transmitting portion 28, the light emitting element 29, the light receiving element 30, the light emitting mounting portion 31, and the light receiving mounting portion 32 constitute the transmission detecting means 33.

In the above-mentioned structure, the cleaning water supplied to the cavity 1 through the water supply port 23 by opening the water supply valve 22 is rotated from the cleaning / drainage pump 7 to the normal direction, and the cleaning water is piped from the recess 5 on the bottom surface of the cavity 1. It is sucked into the pump casing 11 via 12 and is sent to the nozzle 3 from the discharge port 9. During this time, the light-receiving element 30 detects the light emitted from the light-emitting element 29 toward the light-receiving element 30 through the wash water passing through the pipe 12. Since the light transmittance of the wash water changes depending on the degree of dirt, the degree of dirt of the wash water is detected by the amount of light received by the light receiving element 30, and the controller 25 controls the washing process based on the detected degree of dirt.

When the washing process is completed, the washing / drainage pump 7 is reversed and the water is drained through the drainage pipe 21. Pump casing 1 to reduce dishwasher height
Since the first inlet 8 is opened toward the side, somewhat if drainage washing and draining pump 7 becomes drained impossible undergo hair air, the recess 5 as remaining water pipe 12, the pump casing 11 Rinsing water remains in. However, since attaching the washing and draining pump 7 as inlet 8 increases the pump casing 11 from the discharge port 6 of the recess 5, the water surface of the water remaining is at the position of B in Fig. Therefore, the light transmitting / transmitting portion 27 and the light receiving / transmitting portion 2 provided on the surface facing the light transmitting / transmitting portion 27.
Since 8 is above the surface of the residual water and is not submerged in the residual water, the light emitting and transmitting portion 27 and the light receiving and transmitting portion 28 are prevented from becoming dirty and clouded by the remaining water.

[0013]

According to the present invention, the discharge port is provided at the bottom of the water reservoir.
Position of the permeation detector is higher than the bottom of the water reservoir.
Since it can be placed in a storage place, do not enlarge the water reservoir.
And there is no need to worry about the air being caught in the cleaning pump during cleaning.
The permeation detection means can be prevented from being immersed in the residual water after drainage,
The excess detection means is not contaminated by the residual water, and the detection performance of the cleaning state does not deteriorate.

[Brief description of drawings]

FIG. 1 is a side sectional view of the dishwasher of the present invention.

FIG. 2 is an enlarged view of the bottom of the cavity.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 1 Cavity 3 Nozzle 5 Recess (Water Reservoir) 6 Discharge Port 7 Cleaning / Drainage Pump 8 Suction Port 9 Discharge Port 12 Pipe 33 Permeation Detection Means

Claims (1)

(57) [Claims] 1. A cavity for accommodating tableware, a water reservoir provided at the bottom of the cavity, and a water reservoir provided at the bottom of the water reservoir.
A discharge pump having a discharge port, a suction port, and a discharge port, which is attached to the outer bottom surface of the cavity, a nozzle for spraying the cleaning water supplied from the discharge port of the cleaning pump onto the dishes, A pipe connecting the discharge port of the water reservoir and the suction port of the cleaning pump, and a water passage provided from the discharge port of the water reservoir to the suction port of the cleaning pump, and the permeability of the cleaning water. And a drainage pump for discharging water in the cavity
In dishwasher comprising a said transmission detecting means
Bend the water passage to a position higher than the outlet.
Water in the water passage after being drained by the drainage pump
A dish washer / dryer characterized by being installed in a position exposed from the .