JPH11332812A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dishwasher which enables reduction in cost by automatically feeding of a detergent with a mechanismic structure without electric control. SOLUTION: In a float 303 liftably held by a pair of vertical cross pieces 305a and 305b as holding member 305, which rises or falls in response to the level of washing water, a guide groove 309 is formed on the holding member 305 and with the rise or fall of the level of the washing water for prewashing, an input part 303a of the float 303 does not push up a receiving part 321d of a second engaging member 321 as lever and instead, with the rise in the level of the washing water for main washing, the input part 303a does it. The engagement between an engaging part 321c of the second engaging member 321 and an engaging part 319a of a first engaging member 319 is released so that an opening-closing lid energized by a spring toward a releasing position turns toward the releasing position from a closure position. As a result, a mouth part 311 for discharging a detergent of a detergent housing chamber is opened toward a washing chamber to feed the detergent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher and, more particularly, to a dishwasher in which after prewashing, a detergent is automatically put into a washing tank for main washing.

[0002]

2. Description of the Related Art Some dishwashers perform a main wash after a pre-wash, or some perform a main wash only.
In any case, the detergent is put into the washing chamber before the main washing and the washing is performed. However, from the viewpoint of washability, the one in which the main washing is performed after the pre-wash is superior. In particular, dishwashers that automatically put detergent into the washing room after pre-washing,
Although convenient, store detergent temporarily during pre-washing,
After the pre-washing is completed, the used washing water is drained, and the detergent is introduced into the washing room before the start of the main washing.

Conventionally, washing water is supplied to a water tank in a washing room for prewashing, and a water level sensor detects a water level sufficient for the prewashing, and the prewashing is performed. After the pre-wash, the wash water is drained, and the wash water for the main wash is supplied to the water tank in the wash room. Then, the water level sensor detects a water level sufficient for the main washing, the solenoid valve is opened by excitation of the solenoid, and the detergent is introduced into the washing chamber from the outlet for discharging the detergent. In this way, the main washing has been performed after the detergent has been introduced.

[0004]

However, as in the prior art, when an electromagnetic valve using a solenoid is used in an operation of automatically introducing a detergent into a cleaning chamber after pre-washing, a control circuit, a harness, and the like are used. In addition to the cost increase, the cost is high, and the electric devices are susceptible to liquids. For example, a waterproof structure such as potting with urethane resin is required, and the manufacturing process becomes complicated, which also increases the cost.

[0005] Therefore, the present invention is based on "after pre-washing,
A dishwasher that automatically puts detergent into the washing room and performs main washing ”, a dishwasher that can reduce costs by automatically feeding detergent with a mechanical structure without electrical control. The task is to provide.

[0006]

Means for Solving the Problems The solution of the present invention taken to solve the above-mentioned problem is as follows: "a float which rises and falls in response to a washing water level of a water tank in a washing room, and a float which is held up and down freely. A first position corresponding to the first water level before the pre-wash, wherein the first position is provided on the holding member,
A second position corresponding to the second water level during pre-washing, and a third position corresponding to the third water level in a state where the washing water is drained after the pre-washing is completed.
And a guide groove for moving the supported portion of the float in this order by buoyancy acting on the float or by the weight of the float between the position of the main wash and the fourth position corresponding to the fourth water level in the main wash. A detergent storage chamber having a discharge port opening toward the cleaning chamber side, an opening / closing lid for opening and closing the port, and a float-supported portion ascending from a third position to a fourth position. At this time, a lid opening means for opening the opening / closing lid.

[0007] According to such a solution, the held portion of the float moves the first, second, third, and fourth positions of the guide groove of the holding member in response to the washing water level of the water storage tank. The opening / closing lid is opened when the user moves to the position and moves upward from the third position to the fourth position for the main washing. Therefore, when the float moves upward from the third position to the fourth position for the main washing, the buoyancy received by the float becomes a force for opening the opening / closing lid. Will be possible.

The opening means includes, for example, an urging means for urging the opening / closing lid toward the opening position, and a mechanism for engaging / holding the opening / closing lid at the closing position and releasing the engagement / holding by a predetermined releasing operation. The engagement means and an engagement release mechanism for performing a release operation on the engagement means in conjunction with the float when the supported portion of the float moves upward from the third position to the fourth position. What is necessary is just to comprise.

Specifically, the holding member comprises a pair of vertical rails (305a)
(305b), the guide groove is provided with an ascending guide groove (309a) rising from the first position to the second position, and a third position when descending from the second position. This can be achieved by means constituted by an inclined guide groove (309b) obliquely descending and a guide groove (elevating guide groove (309c)) rising from the third position to the fourth position. The means can be achieved by means such as a spring (323), the engaging means being a first engaging member (319) acting as a cam and a second engaging member (321) acting as a lever. And a spring (323) for holding the engagement with the first engagement member (319) and the second engagement member (321). 1
The input portion (303a) serving as a pin for releasing the engagement between the engagement member (319) (cam) and the second engagement member (321) (lever) is moved from the third position of the float to the fourth position. Receiving portion (321) of the second engaging member (321) provided in the locus of movement to the position.
This can be achieved by a mechanism that pushes up d).

[0010]

According to the present invention having the above configuration, the following specific effects are obtained. First, since it is not an electrical structure but a mechanical structure, a simple configuration is sufficient, and cost can be reduced. Second, since it is not a structure that is weak against liquid like an electric structure, it is not necessary to pursue the perfection of waterproofing, and it is possible to simplify the manufacturing process and reduce costs.

<Others> Regarding item a) In addition to the solution of the above-mentioned invention, "the lid opening means biases the opening / closing lid toward the open position, and engages and holds the opening / closing lid at the closed position. And an engaging means for releasing the engagement and holding by a predetermined releasing operation, and the engaging means in conjunction with the float when the supported portion of the float moves upward from the third position to the fourth position. And a disengagement mechanism for performing the disengagement operation. "

The opening / closing lid is engaged and held in the closed position by the engaging means. When the float moves upward from the third position to the fourth position for the main washing, the above-mentioned disengagement mechanism releases the float. When the engagement is released, the opening / closing lid opens toward the open position by the urging force of the urging means, and the detergent discharge port of the detergent accommodating chamber opens toward the cleaning chamber. Therefore, with the above-described mechanical structure, the detergent can be automatically fed after the pre-wash and before the main wash.

Regarding item b In addition to the solution of the above-mentioned invention, "a detergent accommodating chamber having an opening / closing door, a float, and a holding member having a guide groove are provided on a door for opening and closing a front opening portion of the washing chamber, After the main washing, the supported portion of the float moves down from the fourth position to the third position by the drainage of the washing water, and the supported portion of the float moves from the closed position to the open position. The guide groove is configured to return from the position 3 to the first position. "

After completion of the main washing, the washing water is drained, and the float-supported portion is moved from the fourth position to the third position by the weight of the float.
When the door that closed the front opening portion of the washing chamber is opened for the next dishwashing, the supported portion of the float returns from the third position to the first position, so that a new position is obtained. If you put dirty dishes and close the door, it will be in the initial state. Therefore, in addition to the above-mentioned effects, a change in the water level of the water storage tank and the opening and closing of the door can automatically perform the detergent automatic injection after the mechanical pre-wash and before the main wash, and the mechanical automatic structure can also perform the cyclic automatic input.

Regarding item c In addition to the means for solving the above-mentioned invention, "the holding member is a pair of vertical beams which are arranged opposite to each other in a vertical position on the door in the closed position, and each vertical beam has There is a second position above the first position, a fourth position above the third position, and the guide groove includes a rising guide groove that rises from the first position to the second position; When descending from the position, the inclined guide groove obliquely descends toward the third position, the elevating guide groove that moves up and down between the third position and the fourth position, and the first guide groove from the third position. The guide groove is formed in each vertical rail so that each position and each groove face each other, and the float is provided so as to move up and down between the vertical rails. Is supported movably in each guide groove, and furthermore, the float has an input portion of an engagement release mechanism. Is provided in the engaging means, and a receiving portion of the disengagement mechanism is provided in a movement locus from the third position of the float to the fourth position. , The engagement of the engagement means is released by pushing up. ”The present invention can be specifically realized.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described together with the illustrated example. FIG. 1 is a schematic explanatory view of a dishwasher (201) according to an embodiment of the present invention as viewed from a side. <Dishwasher> The dishwasher (201) is a dishwasher that performs a main wash after pre-washing. The front opening (205) in front of the washing room (203) can be closed and opened and closed. Door (207)
Is brought into a closed state by taking a closed posture, and pre-washing and main washing can be performed.

Further, after the pre-washing, the dishwasher (201)
An automatic detergent dispenser (209) for automatically dispensing detergent into the washing room (203) is provided.The automatic detergent dispenser (209) is provided below the inner surface of the door (207) on the washing room (203) side. Have been. The structure and operation of the automatic detergent dispenser (209) will be described later. First, the main structure of the dishwasher (201) will be described with reference to FIG.

A dish basket (211) is accommodated in the washing room (203). The dish basket (211) is a lower basket (211a) and an upper basket (211b) formed in a rectangular shape in plan view. And a piece mainly extending upward from the rear end of the lower basket (211a).
An upper car (211b) is connected to upper left and right side portions of (211c), and is rotatable upward about a connecting portion (211d).

The rotatable upper basket (211b) has the advantages of facilitating the storage of tableware in the lower basket (211a) and the storage of large tableware in the lower basket (211a). Because there is. A plurality of rollers (211e) are provided at the lower end of the left and right sides of the lower car (211a) at a predetermined pitch in the front-rear direction. ) Is provided with a pair of rails (213) extending in the front-rear direction so as to sandwich the roller (2) from above and below.

In this way, when the door (207) is in the open position, the tableware basket (211) can move forward and backward. The lowest part of the washing room (203) is a water storage tank (215), and a heater (217) for raising the temperature of the washing water stored in the water storage tank (215) and keeping it warm is provided in the water storage tank (215). Is provided. The front lower surface of the water storage tank (215) is open, and the washing water filtered by the garbage filter (219) through the opening is lowered by the cleaning pump (221) from the side of the garbage filter (219). It is sent to the nozzle (223) and sent to the upper nozzle (227) through the circulation pipe (225). Lower nozzle (223) and upper nozzle
Washing water is sprayed from the nozzle hole of (227) to the tableware stored in the tableware basket (211) to perform cleaning.

In this washing, the washing water is circulated in both pre-washing and main washing, and the washing water stored in the water storage tank (215) is supplied by a water supply provided near the center of the rear surface of the washing chamber (203). Water or hot water discharged from the opening (229) and sent from the water supply pipe (233) is opened by opening the solenoid valve (231). The washing water in the pre-washing is the water or hot water itself discharged from the water supply opening (229), but the washing water in the main washing is the one in which the detergent is added to the water or hot water as described above. .

After the pre-wash and the main wash, the wash water is drained, respectively, by operating the drain pump (235) and opening the solenoid valve (239).
This is performed through a drain pipe (237) extending from the lower part of the garbage filter (219) to the outside of the dishwasher (201). The dishwasher (201) can perform main washing by automatically adding a detergent after prewashing, and can also dry tableware after washing. Specifically, an air supply duct (241) is connected to an air supply opening (243) provided near the lower rear surface of the cleaning chamber (203), and air is taken in from an air supply port (not shown). The entrapped air becomes high-temperature air dried by the heater (217) and absorbs moisture attached to the dishes to become humid air.The humid air is exhaust air provided near the center of the upper surface of the washing room (203). Air is exhausted from the exhaust port (249) to the outside of the dishwasher (201) through an exhaust duct (245) connected to the opening (247).

<Detergent automatic dispenser> Next, detergent automatic dispenser
(209) will be described with reference to FIGS. FIG.
FIG. 3 is a view of the detergent automatic dispenser (209) of FIG. 1 as viewed from the side of the washing chamber (203), and FIG. 3 is a diagram showing the internal structure of the detergent automatic dispenser (209) of FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG.
FIG. 5 is a sectional view taken along line VV of FIG. 2.

The detergent automatic dispenser (209) has the appearance of a rectangular parallelepiped box (301) without a bottom, and has a detergent accommodating chamber (313) provided therein on the side facing the washing chamber (203). A mouth (311) for discharging the detergent is formed, and an opening / closing lid (315) closing the mouth (311) for discharging the detergent is opened by a mechanism described later, and the mouth (311) for discharging the detergent is opened. When opened, detergent is applied to the washing room (203)
It is thrown into.

<Relationship Between Float and Holding Member> As a detergent introduction mechanism, a float (303) that rises and falls in response to the washing water level in the washing chamber (203) and a float (3) are provided inside the box (301).
And a holding member (305) for holding the upper and lower parts 03) vertically. The holding member (305) includes a pair of vertical rails (305a) and (305b) that are arranged in parallel with each other in a vertical position on the closed door (207). The relationship between the float (303), the vertical rail (305a), and the vertical rail (305b) will be described with reference to FIGS.

FIG. 7 is a view showing the vertical bar (305b) corresponding to the door (207) in the closed position, and FIG. 8 is a view showing the door (20) in the open position.
FIG. 7 is a view showing a vertical crosspiece (305b) corresponding to 7). float
The (303) is provided with a supported portion (307) shown in FIG. 3 which is supported by the holding member (305), and the supported portion (307) specifically projects to the vertical rail (305a) side. It is composed of a shaft (307a) and a shaft (307b) projecting symmetrically on the side of the vertical rail (305b). The holding member (305) (vertical rail (305a), vertical rail (305b)) has a supported part (3
07) (the shaft part (307a) and the shaft part (307b)) are the first position (a) corresponding to the first water level before the pre-washing in the water tank (215) of the washing room (203); The second position (b) corresponding to the second water level during pre-washing when the water level has risen and the third position (c) corresponding to the third water level in a state where the washing water has been drained after the completion of pre-washing.
(The same height as the first position (a)), and a fourth position corresponding to the fourth water level during the main washing, in which the water level is increased after the water is supplied again.
(d) (at the same height as the second position (b)) and the float (30
A guide groove (309) is provided to move in this order by buoyancy acting on (3) or the weight of the float (303). In addition, the guide groove (309), each vertical rail (305a), so that the above-mentioned each position and each groove is opposed (mirror image)
It is formed on a vertical crossbar (305b).

<Guide Groove> The guide groove (309) will be described more specifically with reference to the vertical rail (305b) shown in FIGS. The vertical rail (305b) has a second position (b) above the first position (a), a fourth position (d) above the third position (c), and a guide groove (305). 309) includes a rising guide groove (309a) in which the shaft (307b) rises from the first position (a) to the second position (b), and a shaft (3).
07b) descends from the second position (b) when the third position
(c) an inclined guide groove (309b) that descends obliquely toward
(307b) moves up and down between the third position (c) and the fourth position (d), and returns from the third position (c) to the first position (a). And a return guide groove (309d).

<Relationship between the urging means, the engaging means, and the disengagement mechanism that constitutes the lid opening means>
Inside (301), an urging means for urging the opening / closing lid (315) toward the open position, the engagement / holding of the opening / closing lid (315) to the closed position, and the above-mentioned engagement holding by a predetermined releasing operation. The engagement means to be released and the supported portion (307) of the float (303) are
9) When the ascending movement from the third position (c) to the fourth position (d) is performed, the disengaging operation is performed on the engaging means in conjunction with the rise of the float (303). An engagement release mechanism is provided.

The engagement means and the engagement release mechanism will be specifically described with reference to FIGS. The biasing means is a spring (31
7) The engaging means includes a first engaging member (319) serving as a cam, a second engaging member (321) serving as a lever, and a second engaging member (319). It comprises a member (321) and a spring (323) for holding the engagement. The disengagement mechanism includes an input portion (303a) serving as a pin provided on the upper portion of the float (303), and the float (303) rising from the third position (c) to the fourth position (d). A receiving portion (321d) formed at the tip of a second engaging member (321) provided in a moving locus of movement. Input section (303
a) is to push up the receiving portion (321d) to make the first
The engagement between the engagement member (319) (cam) and the second engagement member (321) (lever) is released.

One end of the first engaging member (319) is connected to the box (30).
1) It is rotatably mounted on a rotating shaft (301a) provided above the detergent storage chamber (313) on the outside of
(315) and the other end is connected to the second engaging member (321).
And an engaging portion (319a) that engages with. A spring (317) is wound around the outer periphery of the cylindrical portion (319b) formed at one end of the first engagement member (319) and rotatable around the rotation shaft (301a). The first engaging member (3) is urged clockwise in FIG. 3 by the urging force of the spring (317).
When the engagement with the second engagement member (321) is released, the opening / closing lid (315) rotates clockwise upward as an open position.

The second engaging member (321) has a shape as shown in FIG. 6 in plan view, and has a first portion (321a) and a first portion (321a) along the inner surface on the outer side of the box (301). A second portion (321b) that is bent from the end of the second portion (321a) and extends forward on the side of the cleaning chamber (203);
(301) and a third portion (321e) along the inner surface.
A substantially central portion of the first portion (321a) is a support shaft (301b) provided obliquely below the rotation shaft (301a) on the inner surface of the outer side of the box (301).
Is rotatably mounted on one end (the second engaging member (321)).
Of the first engaging member (319).
An engaging portion (321c) that engages with (a). Third part (321
One end of e) (the other end for the second engaging member 321) is a receiving portion (321d) for receiving the input portion (303a) of the float (303).

For the main washing, the float (303) rises along the elevating guide groove (309c) of the guide groove (309) by buoyancy, and moves from the third position (c) to the fourth position (d). Only when the input portion (303a) moves to the receiving portion of the second engagement member (321).
Push up (321d), but float (303) for pre-washing
The input portion (303a) does not hit the receiving portion (321d) even if the input portion (303a) moves upward along the rising guide groove (309a) due to buoyancy, and the input portion (303a) and the engaging portion (319a) of the first engaging member (319) The engagement of the engagement member (321) with the engagement portion (321c) is maintained. As shown in FIG. 3, this holding is performed by a protruding plate (301) provided diagonally below the rotating shaft (301a) and diagonally above the support shaft (301b) on the outside inside the box (301).
c) and a spring (323) is provided between the first portion (321a) of the second engaging member (321) and the second portion (321b) side of the pivot portion, and the engaging portion (321c) is This is made possible by being biased to rotate around.

<Explanation of Operation> The door (207) is opened, the tableware is stored in the tableware basket (211), the detergent is stored in the detergent container (313) once, and the door (207) is closed. Ready for cleaning. At this stage, the float (303) is
In the first position (a), a detergent is contained in the detergent accommodating chamber (313), and the first engaging member (319) and the second engaging member (3
21) meshes and engages, and the opening / closing lid (315) closes the mouth (311) for discharging the detergent.

Next, the solenoid valve (231) is opened for pre-washing, and water or hot water as washing water is stored in the water tank (2) of the washing room (203).
Water is supplied to 15). As the washing water level rises,
The float (303) receives the buoyancy so that the shafts (307a) and (307b) rise from the first position (a) of the guide groove (309) through the ascending guide groove (309a) to the second position ( b) is reached. Second position
The float (303) in (b) is shown by the phantom line in FIG. 5, and since the input portion (303a) does not push up the receiving portion (321d) of the second engaging member (321), the opening / closing lid (315) is It is engaged and held in the closed position.

After pre-washing is completed, a drain pump (23
5) is operated to drain the washing water used in pre-washing. In accordance with this drainage, the float (303) has its own weight, so that the shaft portions (307a) and (307b) pass through the inclined guide groove (309b) from the second position (b) of the guide groove (309) to the third position ( c) descend to. The float (303) in the third position (c) is shown by the solid line in FIG.

Next, the solenoid valve (231) is opened to perform main washing, and water or hot water is supplied to the water storage tank (215) of the washing room (203). As the water level rises, the float (303) receives the buoyancy and the shafts (307a) (307b) rise from the third position (c) of the guide groove (309) through the elevating guide groove (309c). To the fourth position (d). In this case, float (303)
Input portion (303a) pushes up the receiving portion (321d) of the second engagement member (321). The float (303) just before being pushed up is shown by a solid line in FIG. 5, and the float (303) and the second engagement member (321) in the pushed up state are shown by phantom lines in FIG.

As a result of being pushed up by a force equal to or greater than the urging force of the spring (323), the engaging portion (319a) of the first engaging member (319) and the engaging portion (321c) of the second engaging member (321). With the spring (3
The opening / closing lid (315) is rotated clockwise toward the upper open position by the urging force of 17). And the detergent storage room (31
The detergent discharge port (311) of (3) is opened toward the cleaning chamber (203), the detergent is poured into the cleaning chamber (203), and the cleaning water for main cleaning is It becomes water or hot water containing detergent.

After the main washing, the drain pump (23)
5) is operated and the washing water used in the main washing is drained. In accordance with this drainage, the float (303) is lowered by its own weight so that the shafts (307a) and (307b) descend from the fourth position (d) of the guide groove (309) through the elevating guide groove (309c) to the third position. Position (c). After washing, the dishes are dried, and when the door (207) is opened to take out the dishes, the float (30
3), the shafts (307a) and (307b) have their guide grooves (309)
From the third position (c) through the return guide groove (309d), and returns to the first position (a).

<Points of Special Consideration of Guide Groove> As shown in FIG. 7, ascending guide groove (309a) and inclined guide groove
(309b) and the shape of the elevating guide groove (309c) do not rise from the first position (a) to the fourth position (d), but move from the second position (b) to the first position.
From the fourth position (d) to the first position without descending to the position (a)
(c) The shape must not fall.

FIG. 9 is an enlarged view of the vicinity of the third position (c) in FIG. 8. If the diameter of the shaft portion (307b) is R in FIG. 9, the return guide groove (309d) is R / 4. Steps with the following dimensions (32
After forming 5), it is preferred that a downwardly directed slope (326) begins to form. This is the door (20
7) When is opened, the center of gravity of the shaft portion (307b) is set on the inclination (326) so that it does not stop at the third position (c) but at the first position (a).
This is to ensure that it falls.

In the door (207) in the closed position, the first position (a) and the third position (c) are set at substantially the same height, and the second position (b) and the fourth position (d) are set substantially at the same height. It is the same height,
The height need not be the same. In particular, if the second position (b) is set at a lower position, the shape of the second engaging member (321) can be eliminated by eliminating the third portion (321e) during pre-washing.
Even if the receiving portion (321d) is provided at the tip of (321b), the second
The opening / closing lid (315) does not open without coming into contact with the portion (321b).

In the above embodiment, the float (303)
The receiving portion (321d) of the second engaging member (321) is pushed up by the input portion (303a) of the second engaging member (321), and the second engaging member (321) is rotated by the support shaft (301b). 321) and the first engaging member
(319a) is disengaged from the engaging portion (319a), for example, the lower surface of the receiving portion (321d) is tapered,
When the input portion (303a) comes into contact with the ascending portion, the second engaging member (3
21) slides in the front-rear direction, and by this slide, the engaging portion (319a) of the first engaging member (319a) and the second engaging member (321)
May be disengaged from the engaging portion (321c).

In the above embodiment, a pair of vertical bars (305a) and (305b) is used as the holding member (305), and the float (303) is used.
Although the shaft portions (307a) and (307b) are used as the supported portions (307) of the above, and the guide grooves (309) are formed in the vertical bars (305a) and (305b) in a mirror-mirror state, for example, Guide groove only on the pier (305a)
(309) may be formed, and the supported portion (307) of the float (303) may be only the shaft portion (307a). In this case, the vertical rail (305b) does not have the guide groove (309), but is merely a flat vertical rail, and the vertical rail (305b) side of the float (303) is flattened.
(303) and both flat portions of the vertical rail (305b) may be slid.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a dishwasher (201) according to an embodiment of the present invention as viewed from a side.

FIG. 2 is a view of the detergent automatic dispenser (209) of FIG. 1 as viewed from a washing room (203) side.

FIG. 3 is a view showing the internal structure of the automatic detergent dispenser (209) of FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;

FIG. 5 is a sectional view taken along line VV of FIG. 2;

FIG. 6 is a plan view of a second engagement member (321).

FIG. 7 is a view showing a vertical rail (305b) corresponding to the door (207) in a closed position.

FIG. 8 is a view showing a vertical rail (305b) corresponding to the door (207) in the open position.

FIG. 9 is an enlarged view near a third position (c) in FIG. 8;

[Explanation of symbols]

 (201) ・ ・ ・ Dishwasher (203) ・ ・ ・ Washing room (303) ・ ・ ・ Float (305) ・ ・ ・ Holding member (309) ・ ・ ・ Guide groove (313) ・ ・ ・ Detergent storage room ( 315) Open / close lid (317) Spring (319) First engagement member (321) Second engagement member (323) Spring (303a) Input (The same reference numerals in each figure indicate the same or corresponding parts.)

Claims (4)

[Claims] 1. A dishwasher for performing a main wash by automatically charging a detergent into a washing chamber after prewashing, wherein the float rises and falls in response to a washing water level in a water storage tank of the washing chamber; And a second position provided in the holding member, the first position corresponding to the first water level before the pre-wash, and the second position corresponding to the second water level during the pre-wash. The float is provided at a third position corresponding to a third water level in a state where the washing water is drained after the pre-washing, and a fourth position corresponding to a fourth water level in the main washing. A guide groove for moving the supported portion to be moved in this order by buoyancy acting on the float or the weight of the float, a detergent accommodating chamber in which a mouth for discharging the detergent opens toward the washing chamber side, An opening / closing lid that is openably and closably closed, and the float is supported by the float. A lid opening means for opening the opening / closing lid when the part moves upward from the third position to the fourth position. 2. The cover opening means includes: urging means for urging the open / close lid toward an open position; and engaging / holding the open / close lid at a closed position, and the engagement / holding being performed by a predetermined releasing operation. An engagement unit to be released, and when the supported portion of the float moves upward from the third position to the fourth position, the release operation is performed on the engagement unit in conjunction with the float. The dishwasher according to claim 1, further comprising: a disengagement mechanism for performing the following. 3. The detergent accommodating chamber having the opening / closing lid,
The float, and the holding member having the guide groove is provided on a door that opens and closes a front opening portion of the cleaning chamber. From the third position to the third position, and by moving the door from the closed position to the open position, the supported portion of the float returns from the third position to the first position. The dishwasher according to claim 1 or 2, wherein the dishwasher is configured with a guide groove. 4. The holding member is a pair of vertical rails arranged to face each other in a vertical position on the door in a closed position, and each of the vertical rails is provided above the first position. The second position includes the fourth position above the third position, the guide groove includes an ascending guide groove that rises from the first position to the second position, An inclined guide groove which obliquely descends toward the third position when descending from the position, an elevating guide groove which ascends and descends between the third position and the fourth position, A return guide groove that returns from the position to the first position, wherein the guide groove is formed in each of the vertical rails so that the respective positions and the respective grooves face each other, and the float is formed between the vertical rails. The supported portion of the float is automatically moved to each of the guide grooves. The float is further provided with an input portion of the disengagement mechanism. The engagement means includes an input portion for moving the float within a movement locus from the third position to the fourth position. The dishwasher according to claim 3, wherein a receiving portion of an engagement release mechanism is provided, wherein the engagement release mechanism releases the engagement of the engagement means by pushing up the receiving portion with the input portion. Machine.