JP4416703B2 - Dishwasher with silencer - Google Patents

Description

  The present invention relates to a dishwasher that sequentially performs washing, rinsing, and drying of dishes, and more particularly, to a dishwasher that silences the sound of washing water falling on the water surface in a washing tank during washing and rinsing.

As shown in FIG. 5, the dishwasher includes a washing tub 10 in the inside thereof. In the washing tub 10, there are tableware baskets 12, 12 ′ for storing tableware, and below the tableware baskets 12, 12 ′. The water receiving part 16 which has the rotating nozzle (injection nozzle) 13 which injects wash water from, the heater 14 which warms wash water and air, and the leftover filter 15 is provided. The cleaning tank 10 includes a cleaning pump 17 that supplies cleaning water to the rotary nozzle 13, a water supply electromagnetic valve 18 and a water supply pipe 19, a water supply means that supplies water to the cleaning tank 10, a drain pump 20, A drainage unit that includes a drain pipe 21 and discharges water from the washing tank 10, a drying fan 22 and an exhaust port 23, and a drying unit that feeds air from the outside to dry the dishes are attached.
In FIG. 5, reference numeral 24 is a door for taking in and out the cleaning tank 10, and reference numeral 25 is a water level switch for detecting the water level in the cleaning tank 10. Reference numeral 15 ′ is a handle of the leftover filter 15, and reference numerals 26 and 27 are a drain trap and a drain check valve provided on the downstream side of the drain pipe 21.

In such a dishwasher, after setting various dishes in the dish baskets 12 and 12 'in the washing tub 10, the power switch 28 is turned on to select a desired course, and the start / pause switch 29 is turned on. Then, the cleaning process, the rinsing process, and the drying process are automatically executed by the control unit 30. Among these, in the washing process and the rinsing process, the washing water pressurized by the operation of the washing pump 17 is sprayed from the rotary nozzle 13 and collides with the tableware in the tableware basket 12 and the peripheral wall of the washing tub 10 and the washing process is too easy. Processing is performed.
In the cleaning process and the rinsing process, noise is generated when the cleaning water sprayed from the rotary nozzle 13 collides with the tableware or the wall of the cleaning tank 10. In addition, after the sprayed washing water collides with the tableware or the wall of the washing tub 10, it becomes water droplets and falls onto the water surface in the washing tub, thereby generating noise such as water splashing noise. Such noise in a dishwasher is a big problem for users.

Therefore, in order to reduce such noise, a sound absorbing member is provided so that sound generated in the cleaning tank does not leak to the outside, or a soundproofing member that depressurizes and disperses cleaning water that collides with the peripheral wall of the cleaning tank. Providing has already been proposed.
For example, Japanese Patent Application Laid-Open No. 5-130965 (Patent Document 1) describes a “tableware washing machine” that achieves quietness by preventing noise and vibration generated in a washing tank.
As shown in FIG. 6, the dishwasher accommodates a washing tank 42 in a casing 41, and a washing pump for dishes 49 accommodated in a basket 43 disposed in the washing tank 42. The cleaning water supplied from 44 is sprayed from the spray nozzle 45 for cleaning, and a sound absorbing body 46 in which a sound absorbing material 47 and a sound absorbing sheet 48 are laminated is provided between the casing 41 and the cleaning tank 42. In addition, the cleaning water sprayed from the spray nozzle 45 is configured to absorb noise generated by colliding with the cleaning tank 42.

Japanese Patent Laying-Open No. 2002-282187 (Patent Document 2) describes a “dishwasher” that reduces noise and vibration generated during washing.
As shown in FIG. 7, the dishwasher is provided with a washing chamber 53 in which a front opening 52 is opened and closed by a door 54 in an outer case 51. A tableware bowl 56 to be placed is detachably accommodated, and an injection nozzle 57 for injecting cleaning water to the tableware 55 is rotatably disposed at the bottom of the cleaning chamber 53.
A resin paint 59 mixed with rubber powder is applied in layers on the outer surface of the chamber wall 58 of the cleaning chamber 53, and the resin paint 59 is configured to absorb noise generated during cleaning. .
In addition to the above-mentioned Patent Documents 1 and 2, JP-A-2002-65552 (Patent Document 3, “Dishwasher”) and JP-A 2000-210241 (Patent Document 4, “Dishwasher”) As shown in the figure, a device that devised the structure of the door of the cleaning tub and a device that devised the wall structure around the cleaning tub were proposed so that the sound generated in the cleaning tub does not leak to the outside. Yes.

Japanese Patent Application Laid-Open No. 2004-148094 (Patent Document 5) describes a “dishwasher” that reduces noise generated when a water flow injected from an injection nozzle hits the inner wall of a washing tank. .
As shown in FIG. 8, the dishwasher includes a cleaning tank 61 provided in the main body 60, a door 62 that opens and closes one surface opening of the cleaning tank 61, and the cleaning tank 61. A dish basket 63 for holding tableware, a spray nozzle 64 for spraying cleaning water supplied from the cleaning pump 65 to clean the tableware in the tableware basket 63, and the cleaning tank spaced apart from the inner surface of the cleaning tank 61. It is comprised from the sound-insulation member 66 provided in an inside. The soundproofing member 66 reduces the noise caused by the injection of the cleaning water by causing the predetermined amount of the cleaning water sprayed from the spray nozzle 64 to strike the mesh portion 67 to reduce the pressure and disperse it.

Japanese Patent Laid-Open No. 5-130965 JP 2002-282187 A JP 2002-65552 A Japanese Patent Laid-Open No. 2000-210241 JP 2004-148094 A

The dishwasher described in Patent Literature 1 to Patent Literature 4 reduces noise by preventing the sound generated in the washing tank from leaking to the outside, and is described in Patent Literature 5 described above. In the dishwasher, the washing water sprayed from the spray nozzle is struck against the mesh portion of the soundproofing member and depressurized and dispersed to reduce the noise caused by the spraying. In any case, these dishwashers do not reduce noise by suppressing water noise generated by water droplets falling on the surface of the washing water in the washing tank.
As described above, in order to suppress the noise generated when the water droplets of the washing water fall on the water surface, it is conceivable to fix the silencer plate to the bottom surface of the washing tank with a screw or the like. Since it fluctuates depending on the amount of water supplied to the cleaning tank or the like, there are times when it is higher or lower than the height of the fixed silencer, and it is not always possible to reduce the generation of noise. For example, when the water level of the washing water is lower than that of the sound deadening plate, the sound deadening plate itself generates a loud sound with low vibration due to the drop of water droplets. On the other hand, when the water level of the washing water is higher than that of the silencer plate, since the silencer plate is in the water, it is not possible to suppress a loud sound when a water droplet falls on the water surface.

  The present invention suppresses the sound of water caused by water droplets falling on the surface of the washing water even when the washing water level in the washing tank fluctuates, and prevents the sound deadening plate itself from vibrating so that the dishwasher It is to devise a silencer plate provided in the cleaning tank so as to reduce the noise.

(1) The dishwasher according to the present invention is based on the premise of a dishwasher that stores dishes in a dish basket accommodated in a washing tub and injects washing water from a rotating nozzle to perform washing and rinsing of dishes.
In the area where the cleaning water is stored at the bottom of the cleaning tank, a sound deadening plate that floats on the cleaning water is provided, and the sound deadening plate is always located slightly above the water surface of the cleaning water. It is comprised from the board member which has an air reservoir inside, and moves to an up-down direction according to the fluctuation | variation of the water level of washing water.
According to such a configuration, in the washing process and the rinsing process of the dishwasher, the washing water sprayed from the rotary nozzle collides with the inner wall of the tableware and the washing tub, and after performing the washing process and the rinsing process of the tableware, Although it falls toward the surface of the washing water stored at the bottom of the washing tank, a silencer plate made of a plate member floats on the surface of the washing water, and the dropped water drops are received on the surface of the silencer plate, It is possible to greatly suppress the water splash sound and the sound of waves generated by the drop of water droplets.
Even when the water level of the cleaning water stored in the cleaning tank fluctuates, the sound deadening plate can always keep a predetermined position with respect to the water surface following the water level, so that a good sound silencing effect can always be achieved. Can do.
In addition, since the sound deadening plate is not fixed to the washing tub, it can be taken out from the washing tub as needed. Therefore, it is relatively easy to clean the leftover filter provided at the bottom of the washing tub or the sound deadening plate itself. It is possible.

(2) Moreover, the said muffler board can be divided | segmented and provided.
With such a configuration, the muffler plate arranged in the region where the leftover filter is installed and the muffler plate arranged in another region can be separated. Thereby, the muffler plate disposed on the upper side of the leftover filter can be removed relatively easily, and the leftover filter can be easily taken out and cleaned.

(3) Moreover, the said muffler board can be provided in the area | region which does not overlap with the leftover filter provided in the bottom part of the said washing tank.
With such a configuration, the muffler plate is not disposed above the area where the leftover filter is installed, so that the leftover filter can be taken out without removing the muffler plate. Thereby, the leftover filter can be easily taken out, and the leftover filter can be easily cleaned.

(4) Furthermore, the handle of the leftover filter provided at the bottom of the cleaning tank can be configured to also serve as a guide member for the silencer.
With such a configuration, it is not necessary to separately form a guide member for the muffler plate, the structure can be simplified, and the manufacturing cost can be reduced.
(5) Moreover, the surrounding wall of the said washing tank can be comprised so that it may become a guide member of the said sound deadening board.
With such a configuration, the peripheral wall of the cleaning tank can be used as a guide member for the sound deadening plate, and it is not necessary to separately form the guide member, so that the structure is simple and the manufacturing cost can be reduced.

As described above, according to the dishwasher of the present invention, water drops falling on the water storage area in the washing tub are received by the upper surface of the silencer floating in the washing water, and thus collide with the surface of the washing water. In addition, it is possible to suppress the water splash sound and wave sound generated on the water surface, or the vibration sound of the muffler plate itself, and the noise generated as the dishwasher can be suppressed to be remarkably reduced.
In addition, the water level of the cleaning water in the cleaning tank in the cleaning process and the rinsing process varies depending not only on the amount of water supplied to the cleaning tank and the amount of tableware set in the tableware basket, but also on the discharge pressure of the cleaning pump. However, since the above silencer moves following the fluctuation of the water level and its upper surface is always located slightly above the surface of the washing water, the falling water droplets are always moved by the upper surface of the silencer. Therefore, it is possible to stably obtain a good silencing effect.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[Embodiment 1] (corresponding to claims 1 and 4)
First, the first embodiment will be described with reference to FIGS. 1-1 and 1-2. 1-1 (a) is a schematic view of the entire dishwasher, FIG. 1 (b) is an enlarged view of the main part, FIG. 1-2 (a) is a perspective view of the entire washing tank, FIG. (c) is the perspective view and sectional drawing of a silencer.
(Dishwasher configuration / operation)
As shown in FIG. 1-1 (a), the dishwasher according to the first embodiment is the conventional dishwasher described above (see FIG. 5) except for matters relating to the silencer which is a characteristic part of the present invention. The tableware is automatically washed and dried by operating in the same manner with almost the same configuration as that of (see).

That is, the dishwasher includes a washing tub 10 having tableware baskets 12 and 12 ′, a rotating nozzle (spray nozzle) 13, a heater 14, a leftover filter 15, a water receiver 16, and the like. Water supply means for supplying water, drainage means for discharging water from the washing tub 10, and drying means for drying the dishes in the washing tub 10 are provided, and the tableware is set in the tableware baskets 12, 12 ′. Then, by starting the operation, the washing process, the rinsing process, and the drying process are executed, and the washing and drying of the tableware are automatically performed.
In addition, the code | symbol 15c of FIGS. 1-1 (b) is a fixed-type leftover filter fixed to the water receiving part 16 with a screw | thread etc. FIG.

Next, the configuration and operation of the silencer, which is a feature of the present invention, will be described with reference to FIGS. 1-1 and 1-2.
(Configuration of silencer)
The muffler plate 1 is provided in a region deeply formed at the bottom of the cleaning tank 10 so that cleaning water can be collected. In general, the bottom portion of the washing tub 10 in the dishwasher has a region formed relatively shallow so that washing water does not collect and a region formed deep so that washing water can be collected. A heater 14 is attached to a part of the formed region. The muffler plate 1 is a deeply formed region, and is disposed so as to be able to move in the vertical direction in accordance with fluctuations in the level of the wash water in a region where the heater 14 is not attached, that is, the water storage region 11. (See FIG. 1-2 (a)).

  The sound deadening plate 1 has a shape that matches the planar shape of the water storage region 11 (for example, a rectangle in the example shown in FIG. 1-2), and includes a guide opening 3 and a hole 2 through which cleaning water passes. The guide opening 3 is disposed so as to fit into the handle 15 a of the leftover filter 15. The handle 15a of the leftover filter also functions as a guide member so that the muffler plate 1 can move smoothly only in the vertical direction without moving in the plane. The holes 2 provided in the muffler plate 1 serve to flow cleaning water from the upper surface of the muffler plate 1 to the lower side and are not necessarily formed, but the number, shape and arrangement thereof are Can be selected, and the washing water can be selected so as to smoothly flow to the lower side of the muffler without leaving any leftover waste.

Further, the sound deadening plate 1 is formed using a material having a small specific gravity so that it can float with respect to the washing water, or is formed so as to have an air reservoir 4 inside (FIG. 1-2 (b)). , (c)). Specifically, a resin plate member such as polypropylene or expanded polypropylene is suitable, but a metal plate member may be used. The air reservoir 4 does not necessarily need to be formed depending on the material to be used, but the shape, number and arrangement of the air reservoirs 4 are such that the upper surface of the silencer 1 is floated slightly above the water surface of the washing water ( (See FIG. 1-1 (b)), so that a stable posture can be maintained.
Since the silencer 1 constructed in this manner moves in the vertical direction while being guided by the handle 15a of the leftover filter according to the fluctuation of the washing water level, the upper surface of the silencer 1 is always the surface of the washing water. The water droplets that come out a little more and fall onto the surface of the washing water from above always hit the upper surface of the sound deadening plate 1 regardless of fluctuations in the water level of the washing water.

(Operation of silencer)
Next, the operation of the silencer 1 will be described.
In the washing process and the rinsing process in the dishwasher, the washing water is pressurized by the washing pump 17 and sprayed from the rotary nozzle 13, and collides with the dishes in the dish baskets 12 and 12 ′ and the peripheral wall of the washing tank 10 to perform the washing process. A rinsing process is performed. At this time, the cleaning water colliding with the peripheral wall of the tableware or the cleaning tank 10 falls as water droplets, but since the water droplets falling into the range of the water storage region 11 are received by the upper surface of the sound deadening plate 1, Without collision, water splash sound and wave sound generated on the surface of the water, or vibration sound of the muffler plate itself can be eliminated, and noise generated as a dishwasher can be suppressed to a low level.
The level of the cleaning water in the cleaning tank 10 in the cleaning process and the rinsing process varies depending not only on the amount of water supplied to the cleaning tank 10 and the amount of tableware set in the tableware basket 12 but also on the discharge pressure of the cleaning pump 17. However, since the above-mentioned silencer plate 1 moves following the fluctuation of the water level, its upper surface is always located slightly above the water surface of the washing water, so that any drops of water that fall are always silencer plate. It can be received by the upper surface of 1, and a good silencing effect can be obtained.

[Embodiment 2] (corresponding to claims 2 and 4)
Next, Embodiment 2 will be described with reference to FIG. FIG. 2A is a perspective view of the entire cleaning tank, and FIG. 2B is a cross-sectional view of the silencer.
The dishwasher according to the second embodiment is different from that described in the first embodiment except that the silencer is divided into a plurality of parts, and the other parts have the same configuration. Therefore, the explanation is omitted.

The silencer in the second embodiment is divided into a first silencer 1a and a second silencer 1b. Each of the sound deadening plates 1a and 1b is basically the same as the structure of the sound deadening plate of the first embodiment, and the difference is that the sound deadening plates 1a and 1b are guided by respective guide members. is there. The first sound deadening plate 1a includes a guide opening 3a, and is guided using the handle 15a of the leftover filter 15 as a guide member, as in the first embodiment. The second sound deadening plate 1b has a guide opening 3b and is guided by a guide member 10a (for example, two cylindrical guide members) formed in the bottom portion of the cleaning tank 10.
In this way, by dividing the silencer into a plurality of parts, the silencer disposed in the upper region of the leftover filter 15 (first silencer la) is separated from the silencer disposed in the other region. Therefore, it is easy to remove the muffler plate (first muffler plate 1a) on the upper side of the leftover filter 15 even when a muffler plate is provided in the entire water storage region 11 of the cleaning tank 10. Therefore, cleaning of the leftover filter 15 can be performed relatively easily.

[Third embodiment] (corresponding to claim 5)
Next, Embodiment 3 will be described with reference to FIG. FIG. 3 is a plan view of the main part of the cleaning tank.
The dishwasher according to the third embodiment is the same as that described in the first embodiment, except that the part related to the guide member of the muffler is different, and the other parts have the same configuration, so the description thereof is omitted. Is omitted.

The silencer plate 1 according to the third embodiment is configured not to be guided by the handle of the leftover filter 15 but to be guided by the peripheral wall of the cleaning tank 10 or a part of the peripheral wall.
In the example shown in FIG. 3, guide members 10 b are formed on portions of the peripheral wall of the cleaning tank 10 corresponding to the four corners of the silencer plate 1, so that the silencer plate 1 is guided so as to be movable in the vertical direction. ing. In this example, the guide members 10b are provided at four locations. However, the configuration is not limited to this, and the movement of the muffler plate 1 can be restricted in the plane and the movement in the vertical direction can be guided. If so, various configurations can be adopted for the number, shape, and arrangement.
Note that reference numeral 15 ′ in FIG. 3 is a handle of the leftover filter 15 and does not have a function of a guide member here. Further, the opening 3 ′ formed in the silencer 1 is provided so that the silencer 1 does not interfere with the handle 15 ′ of the leftover filter.
And even if it is a case where the silencer is divided into a plurality of parts as in the second embodiment (see FIG. 2), the guide member can be formed using the peripheral wall of the cleaning tank 10. .

[Embodiment 4] (corresponding to claim 3)
Next, Embodiment 4 will be described with reference to FIG. FIG. 4A is a perspective view of the entire cleaning tank, and FIGS. 4B and 4C are a perspective view and a cross-sectional view of the sound deadening plate.
The dishwasher according to the fourth embodiment is different from the one described in the first embodiment in that the sound deadening plate is not disposed over the entire water storage area of the washing tank, but is partially disposed. Since other configurations have the same configuration, description thereof is omitted.

In the dishwasher according to the fourth embodiment, the sound deadening plate 5 is arranged in a region where the leftover filter 15 is not provided (region that does not overlap with the leftover filter 15) in the water storage region 11 of the washing tank 10. The silencer plate 5 is basically the same as the silencer configuration of the first embodiment (see FIGS. 1-2 (b) and (c)), and has a guide opening 6 and a hole through which cleaning water passes. 2 and an air reservoir 4. The sound deadening plate 5 is guided so as to be movable only in the vertical direction without moving in a plane by fitting the guide opening 6 to a guide member 10 a formed in the bottom portion of the cleaning tank 10. Is done.
In this Embodiment 4, since the area | region where the silencer board 5 is arrange | positioned is narrow compared with the said Embodiment 1, in terms of noise reduction, it is inferior to the thing of Embodiment 1, but a leftover filter Since the upper part of 15 is not covered by the sound deadening plate, removal of the leftover filter 15 is easy and cleaning can be performed easily.
And in this Embodiment 4, it cannot be overemphasized that the guide member of the silencer board 5 can be formed using the surrounding wall of a washing tank.

These are the schematic diagrams explaining the dishwasher by Embodiment 1 of this invention, (a) is the schematic of the whole, (b) is the schematic of the principal part. BRIEF DESCRIPTION OF THE DRAWINGS These are explanatory drawings regarding the silencer plate by Embodiment 1 of this invention, (a) is a perspective view of the whole washing tank, (b) is a perspective view of a silencer board, (c) is AA of (b). It is sectional drawing. These are explanatory drawings regarding the muffler plate by Embodiment 2 of this invention, (a) is a perspective view of the whole washing tank, (b) is sectional drawing of a muffler plate. These are explanatory drawings regarding the muffler plate by Embodiment 3 of this invention, and are top views of the principal part of a washing tank. These are explanatory drawings regarding the silencer plate by Embodiment 4 of this invention, (a) is a perspective view of the whole washing tank, (b) is a perspective view of a silencer board, (c) is BB of (b). It is sectional drawing. These are the schematic diagrams explaining the conventional dishwasher, (a) is the whole schematic, (b) is a perspective view of the whole washing tank. These are the schematic diagrams of the conventional dishwasher. These are the schematic diagrams of another conventional dishwasher. FIG. 2 is a schematic view of still another conventional dishwasher.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1a, 1b, 5 ... Silencer board 2 ... Hole 3,3a, 3b, 6 ... Guide opening 4 ... Air reservoir 10 ... Washing tank 10a, 10b ... Guide member 11 ... Water storage area 12,12 '... Tableware basket DESCRIPTION OF SYMBOLS 13 ... Rotating nozzle (washing nozzle) 14 ... Heater 15 ... Residual filter 15 '... Residual filter handle 15a ... Handle which also serves as a guide member 16 Water receiving part 17 ... Washing pump 20 ... Drain pump 22 ... Drying fan

Claims (5)

In a dishwasher that stores dishes in a dish basket housed in a washing tub and sprays washing water from a rotating nozzle to perform washing and rinsing of dishes,
In the area where the washing water is stored at the bottom of the washing tank, a sound deadening plate that floats on the washing water is provided,
The muffler plate is composed of a plate member having an air reservoir inside so that its upper surface is always slightly above the water surface of the wash water, and moves in the vertical direction according to the fluctuation of the water level of the wash water. Dishwasher featuring.
    The dishwasher according to claim 1, wherein the silencer is divided into a plurality of parts.   2. The dishwasher according to claim 1, wherein the sound deadening plate is provided in an area that does not overlap with a leftover filter provided at the bottom of the washing tank.   The dishwasher according to claim 1 or 2, wherein a handle of a leftover filter provided at the bottom of the washing tank also serves as a guide member for the sound deadening plate. The dishwasher according to any one of claims 1 to 3, wherein a peripheral wall of the washing tank serves as a guide member for the muffler plate.

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