JP2731064B2 - dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a dishwasher.

[0002]

2. Description of the Related Art In recent years, dishwashers have been configured to control washing, rinsing and drying based on the transparency of washing water. FIGS. 4 and 5 show a configuration for detecting the transparency of washing water in the dishwasher. FIG. 4 is an enlarged sectional view of a main part of a conventional dishwasher, and FIG. 5 is a sectional view taken along line AA of FIG.

[0003] In the drawing, reference numeral 1 denotes a cavity provided with an opening on the front side for accommodating tableware, 7 denotes a cleaning and drainage pump for supplying cleaning water to a nozzle (not shown) and jetting the cleaning water to the tableware, and 5 denotes a cavity 1. A concave portion for a water reservoir formed at the bottom of the opening side of the light emitting element 28 irradiates the cleaning water with light to detect the transparency of the cleaning water, and 29 is a light emitting element 28 similarly.
This is a light receiving element that receives light from the light source. The cleaning / draining pump 7 has a suction port 8, a discharge port 9, an impeller 10 and a pump casing 11, and a discharge port 6 is provided from the bottom of the recess 5 to the side.

The space between the discharge port 6 and the suction port 8 is made of rubber.
Connected by a pipe 13. In the suction port 8,
A pair of fitting holes 8a and 8b are formed in the peripheral portion.
You. The fitting holes 8a and 8b are used for the light emitting element 28 and the light receiving element.
This is for holding the element 29. That is, the light emitting element 28 and the light receiving element 29 are
Fitted to be respectively furnished to the attachment portion 30, 31 to be screwed, these mounting portions 30, 31 fitting hole 8 a, the 8b
Have been. Therefore, the light emitting element 28 and the light receiving element 29
Are arranged to face each other with the light transmitting portions 26 and 27 therebetween . At the end of the pipe 13 on the side fitted to the suction port 8,
The light emitting element 28 and the light receiving
A pair of cutout holes 13a and 13b are formed at the position where the element 29 comes.
Has been established. That is, the pipe 13 is fitted into the suction port 8.
At this time, the protruding light emitting element 28 and light receiving element 2
At the end of the pipe 13, a notch 13
a, 13b are formed. And pie into the inlet 8
To fit the connection after tightening the lock 13
An annular band 25 is attached to.

[0005]

In the above-mentioned dishwasher, not only the strength of the connection between the pipe 13 and the suction port 8 is weak, but also the bands 25 are formed by the optical elements 28 and 29 due to vibrations during washing and the like. When it moves to the side, the optical element built-in portion of the pipe 12 is flattened by the tightening force of the band 25. Accordingly, the end of the pipe 13 on the side of the cutout holes 13a and 13b is separated from the peripheral wall of the suction port 8, so that the sealing property of the connecting portion between the pipe 13 and the suction port 8 deteriorates, and the cutout holes 13a and 13b
Water leakage from the

[0006] The present invention has been made in view of the above, and an object thereof is to provide a dishwasher that can reliably ensure the sealing of the connecting portion between pipes and inlet.

[0007]

DISCLOSURE OF THE INVENTION Dishwashing according to the present invention
Machine is provided with an opening in front, a cavity for accommodating the dishes, and water washing water to the nozzle and a pump for injecting the washing water into dishes in the cavity, the discharge port provided at the bottom of the upper Symbol cavity and , to a suction port of the pump, connected externally fitted each end of the pipe made of an elastic material, bar the coupling portion
By attaching the cable and tightening the connection,
Dishwasher with a structure in which the mouth and suction port are connected by a pipe
In order to detect the transparency of the washing water passing therethrough in relation to the suction port, a light emitting element that irradiates the washing water with light and a light receiving element that receives light emitted from the light emitting element face each other. Side that is fitted and externally fitted to the suction port
When fitted into the suction port, the end of the pipe
A pair of notch holes are formed where the
Inside the pair of notches,
A protrusion extending in the circumferential direction of the
After the end of the pipe is fitted over the suction port,
When attaching the above band to the connection with the suction port,
Prevent the metal from shifting toward the notch hole formed in the pipe
It is a protrusion .

[0008]

According to the above arrangement, the inner side of the pair of cutout holes is provided.
Is formed with a protrusion extending in the circumferential direction of the pipe.
When attaching the band to the connection between the pipe and the suction port
The band shifts to the notch hole formed in the pipe.
Can be prevented.

[0009] Thus, the better the sealability of the connecting portion between the pipes and the inlet, need not leak water from the notch hole of the pipe.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a vertical sectional side view of a dishwasher according to an embodiment of the present invention, FIG. 2 is an enlarged view of the bottom of the cavity, and FIG. 3 is a sectional view taken along line BB of FIG. Note that the same reference numerals are given to the same functional components as those of the prior art shown in FIGS.

As shown in FIG. 1, the dishwasher / dryer of this embodiment is provided on a cavity 1 for accommodating tableware, a nozzle 3 rotatably mounted at the center of the bottom of the cavity 1, and a rear side of the cavity 1. A water supply valve 22 for supplying cleaning water into the cavity 1, a cleaning and drainage pump 7 mounted on the outer bottom surface of the cavity 1, for supplying cleaning water to the nozzle 3 and injecting cleaning water into the dishes, and A heater 4 arranged to heat the cleaning water in the cavity 1, a transmittance detecting means 33 for irradiating the cleaning water with light and detecting the transparency (hereinafter referred to as a transmittance) of the cleaning water by an amount of light passing therethrough; Controlling the washing, rinsing, and drying sequence based on the difference between the initial wash water permeability and the wash water permeability at least after a predetermined time and the wash water permeability at any time during the cleaning process System And a part 24.

The cavity 1 is formed in a box shape having an opening for accommodating tableware on the front surface.
A door 2 for closing the opening is attached to the front of the vehicle so as to be openable and closable, and is covered with an outer tub 15. And
At the bottom front of the cavity 1, a recess 5 for a water reservoir is formed. A filter 14 for removing cleaning water residue is disposed in the recess 5, and is provided with an outlet 6 for discharging the washing water from the bottom of the recess 5 to the side.

A rear plate 16 is attached to the outer tank 15 at a predetermined distance from the rear surface of the cavity 1. A circulating wind partitioned by a double-sided fan 17 is provided between the rear plate 16 and the cavity 1. A passage 18 and a cooling air passage 19 are provided. Then, the double-sided fan 17 is driven to rotate by the blower motor 23. The circulation air passage 18 is formed so as to communicate with an exhaust port 20 provided at an upper portion on the rear surface of the cavity 1 and an intake port 21 at a lower portion of the rear surface. The air is forcibly exhausted into the circulation air passage 18, and the air dehumidified by heat exchange with the double-sided fan 17 is sucked into the cavity 1 again through the air inlet 21.

The water supply valve 22 is connected to a water supply port (not shown) provided in the circulation air passage 18. The washing and draining pump 7 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, the pump casing 1
Water is supplied to the nozzle 3 from the discharge port 9 of the nozzle 1 to inject cleaning water into the tableware in the cavity 1, and when the water is reversed, the cleaning water in the cavity 1 is drained through a drain pipe (not shown). Further, a step is provided by setting the position of the suction port 8 of the pump casing 11 to be about 15 mm higher than the discharge port 6 of the recess 5. Further, the suction port 8 and the discharge port 6 of the concave portion 5 are connected by being fitted inside a rubber pipe 13. Although the washing and draining pump 7 serves both as a washing pump and a draining pump, the washing and draining pumps may be provided separately.

The transmittance detecting means 33 is, as shown in FIGS.
In order to detect a change in the permeability of the washing water flowing through the suction port 8,
The light-emitting / transmitting portion 26 is provided in the connection portion L between the suction port 8 and the pipe 13 and is provided on the left side of the connection portion L toward the suction port 8 of the pump casing 11 in FIG. In FIG. 3, the light emitting / transmitting portion 26
And provided on the right side of the opposed coupling portion L, and the light receiving transmission portion 27 which is formed of a transparent member, the light emitting element 28 such as a diode for emitting light to inlet 8 via the emission transmitting portion 26, the light receiving transmission A light receiving element 29 such as a phototransistor that receives irradiation light from the light emitting element 29 through the portion 27 and a light emitting screw fixed to the pump casing 11 in order to fix the light emitting element 28 to the front side of the light emitting / transmitting portion 27. Element mounting part 30
And a light receiving element mounting part 31 screwed to the pump casing 11 to fix the light receiving element 29 to the front side of the light receiving and transmitting part 27.

The mounting portions 30 and 31 are connected to the light emitting element 2.
8 and a light receiving element 29 (hereinafter, collectively referred to as optical elements 28 and 29) with the pipe 13 mounted therein.
And a pair of cutout holes 13 formed in the suction port 8 respectively.
a, 13b and the fitting holes 8a, 8 are held in the connecting portion L. Also, on the entire circumference of the outer peripheral surface of the pipe 13, a protrusion for improving the strength of the pipe 13 is provided.
The annular reinforcing rib 13c are formed integrally to project from the pipe 8, the reinforcing ribs 13c is a connecting position between the pipe 13 and the inlet 8, and is disposed near the outlet side of the mounting portions 30 and 31 ing. Further, the projecting dimension of the reinforcing rib 13c is set so that disturbance light from the opening of the cavity 1 does not enter the transmittance detection position. Further, in order to strengthen the holding state, the outer periphery of the pipe 13
The annular band 25 for tightening the connecting portion L is the reinforcing rib 13
c is attached along the side of the discharge port.

In the above configuration, one end of the pipe 13 is fitted to the discharge port 6 of the recess 5 and the other end is fitted to the suction port 8 of the pump 7 to connect the discharge port 6 and the suction port 8. Next, after mounting the optical element 28 and the light receiving element 29 in the mounting portions 30 and 31, respectively, the cutout holes 13a and 13b of the pipe 13 and the suction port 8 and the fitting hole 8a are formed so that the mounting portions 30 and 31 face each other. , 8. After a while, band 25
Is attached along the outlet side of the reinforcing rib 13c of the pipe 13, and the connecting portion L between the pipe 13 and the inlet 8 is tightened.

In this case, the strength of the pipe 13 is not only improved by integrally forming the reinforcing ribs 13c, but also the band 25 is attached with the reinforcing ribs 13c of the pipe 13 along the discharge opening side face, and the connecting portion L Is tightened, so that the band 25 can be
Even when the band 25 is to be moved to the side, the band 25 comes into contact with the wall surface of the reinforcing rib 13c, and the movement of the band 25 is prevented.

[0019] Ni will this Yo, by fixing the band 25 is improved, as in the prior art, notch hole 13a of the pipe 13, 1
Since the end portion on the 3b side does not separate from the peripheral wall of the suction port 8 with the movement of the band 25 to the optical elements 28 and 29, the sealing property of the connecting portion L is improved, and the notch hole 13 is formed.
Water does not leak from a and 13b. Also, the reinforcing rib 1
3c also functions as a light-shielding wall for preventing disturbance light from entering the transmittance detection position from the opening of the cavity 1,
The accuracy of the transmittance detection by the optical elements 28 and 29 is improved.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made within the scope of the present invention.

[0021]

As is apparent from the above description, according to the present invention, not only the strength of the pipe is improved, but also the band is moved to the light emitting element and the light receiving element side due to vibrations during washing or the like. Abuts against the walls of the reinforcing ribs,
Band movement is blocked. Therefore, since the notch hole side end of the pipe does not separate from the peripheral wall of the suction port with the movement of the band to the light emitting element and the light receiving element side,
The sealing performance of the connection between the pipe and the suction port is improved, and water does not leak from the fitting hole of the pipe.

[0022]

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a dishwasher according to one embodiment 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 BB of FIG. 2;

FIG. 4 is an enlarged sectional view of a main part of a conventional dishwasher.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cavity 3 Nozzle 6 Drainage port 7 Cleaning and drainage pump 8 Suction port 8a, 8b Fitting hole 13 Pipe 13a, 13b Fitting hole 13c Reinforcing rib 25 Band 28 Light emitting element 29 Light receiving element L Connecting part

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Nofumi Satsuma 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-60-48724 (JP, A) Sho 61-293821 (JP, A) Shokai Sho 59-37061 (JP, U) Shokai 57-71876 (JP, U) Shoji 13-13152 (JP, Y2)

Claims (1)

(57) [Claims] [Claim 1 further comprising an opening in the front, provided with a cavity for accommodating the dishes, a pump for injecting the cleaning water to the water supply wash water to the nozzle dishes in the cavity, provided at the bottom of the upper Symbol cavity discharge outlet, to a suction port of the pump, connected externally fitted each end of the pipe made of an elastic material, connecting portions
By attaching a band to and tightening the joint,
Dishwashing with a structure in which the outlet and inlet are connected by a pipe
In order to detect the transparency of the washing water passing therethrough in relation to the suction port, a light emitting element for irradiating the washing water with light and a light receiving element for receiving light emitted from the light emitting element face each other. At the end of the pipe on the side that is externally fitted to the suction port, a suction port
When the light-emitting element and the light-receiving element come
A pair of notches are formed in the
A protrusion extending in the circumferential direction of the pipe inside the notch hole
The protrusion is formed at the end of the pipe at the suction port.
After fitting the pipe to the suction port,
Notch formed in the pipe when attaching
A dishwasher characterized by being a protrusion for preventing the hole from being shifted to the hole side .