JP4653346B2 - Nozzle structure of dishwasher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a nozzle structure of a dishwasher provided with a check valve for preventing a backflow of wash water supplied to a wash nozzle in a flow path for supplying rinse water to a rinse nozzle.
[0002]
[Prior art]
A dishwasher for automatically washing dishes such as dishes, teacups, and cups after eating and drinking is installed in kitchens such as coffee shops and restaurants, and even in general homes, and is widely used favorably. Has reached. This dishwasher is equipped with a rotatable washing nozzle and a rinsing nozzle that are separated from each other in the washing tank, and each nozzle is rotated by the reaction force of washing water and rinsing water and stored in the washing room. Washing water and rinsing water are sprayed on the tableware in the rack for efficient cleaning and rinsing.
[0003]
As a nozzle structure of the dishwasher, for example, there is one disclosed in Japanese Utility Model Publication No. 62-115861. In this nozzle structure, a cleaning nozzle and a rinsing nozzle are disposed in the nozzle bearing so as to be horizontally rotatable, and the cleaning water is supplied to the cleaning nozzle through a cleaning water passage formed in the nozzle bearing. Rinsing water is supplied to the rinsing nozzle through a rinsing water flow path formed in the nozzle bearing.
[0004]
Further, in the nozzle structure, in order to remove detergent components and dirt remaining in the cleaning nozzle after completion of the cleaning operation, the cleaning water channel and the rinsing water channel are communicated, and a part of the rinsing water is connected. The structure which cleans a washing nozzle by supplying to a washing nozzle is adopted.
[0005]
[Problems to be solved by the invention]
In the nozzle structure, since the cleaning water flow channel and the rinsing water flow channel communicate with each other, a part of the cleaning water supplied to the cleaning nozzle flows back to the rinsing water flow channel from the communication portion. Risk of rinsing water contamination. Therefore, a check valve is provided inside the rinse water supply pipe provided in the nozzle bearing to prevent the washing water from flowing back into the rinse water storage tank. In this case, since the check valve is provided in the supply pipe provided in the nozzle bearing, when the check valve is clogged with dust, the nozzle bearing itself must be removed from the supply pipe. In addition, it is pointed out that the disassembling and assembling work is extremely complicated and takes time.
[0006]
OBJECT OF THE INVENTION
The present invention has been proposed in view of the above-mentioned problems inherent in the prior art described above, and it has been proposed to suitably solve this problem, and it is possible to easily clean a check valve and the like. It aims at providing the nozzle structure of a machine.
[0007]
[Means for Solving the Problems]
In order to overcome the above-described problems and achieve the desired purpose suitably, the nozzle structure of the dishwasher according to the present invention is:
The cleaning nozzle and the rinsing nozzle are detachably attached to the nozzle header in a rotatable state, and supply the cleaning water to the cleaning nozzle through the cleaning water flow path in the nozzle header, and the rinsing water flow in the nozzle header. In a dishwasher configured to supply rinse water to a rinse nozzle through a path,
The nozzle header is coaxially disposed inside the cleaning water supply pipe, a cylindrical first header that is detachably threadedly connected to an end of the cleaning water supply pipe, and the cleaning water supply pipe A rinse water supply pipe, a cylindrical second header that is detachably screwed to an end of the rinse water supply pipe facing the first header, and an end of the second header in communication with the second header It is composed of a hollow bolt shaft that is detachably screwed ,
The washing water flow path defined inside the washing water supply pipe and the first header communicates with the washing nozzle, and the rinse water supply pipe, the second header, and the bolt shaft define the inside. A flow path for rinsing water communicates with the rinsing nozzle through the through hole of the bolt shaft;
A check valve for stopping the flow of water from the bolt shaft side to the rinsing water supply pipe inside the second header located upstream of the portion where the washing water flow path and the rinsing water flow path communicate with each other. The check valve includes a holder that is clamped from above and below by the bolt shaft and the second header, and a valve body that is slidable up and down relative to the holder. To do.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, the nozzle structure of the dishwasher according to the present invention will be described with reference to the accompanying drawings by giving a preferred embodiment. First, the basic structure of a dishwasher employing the nozzle structure of the present invention will be described with reference to FIG. A watertight cleaning chamber 14 is defined inside the main body 12 of the dishwasher 10, and a cleaning nozzle 16 and a rinsing nozzle 18 are integrally provided in the vicinity of the upper end portion and the lower end portion of the cleaning chamber 14. The injection assemblies 20 and 20 are disposed so as to be horizontally rotatable with the injection holes (not shown) of the nozzles 16 and 18 facing each other vertically. A washing water tank 22 is provided at the bottom of the washing chamber 14 for storing washing water used for washing tableware and the like, and rinse water used for rinsing tableware and the like is stored inside the main body 12. A tank 24 is provided. Then, the cleaning water is pressure-supplied from the cleaning water tank 22 to the upper and lower cleaning nozzles 16 and 16 to inject the cleaning water from the respective injection holes. Similarly, the rinsing water is pressure-supplied from the rinsing water tank 24 to the upper and lower rinsing nozzles 18 and 18 to inject the rinsing water from the respective injection holes, and the nozzles 18 and 18 are rotated by the injection reaction force. Yes.
[0009]
Since the configuration of the upper and lower injection assemblies 20, 20 is vertically symmetrical, only the configuration of the lower injection assembly 20 will be described.
[0010]
As shown in FIGS. 1 and 2, a cylindrical first header (member) 28 communicates with an upper end portion of a cylindrical cleaning water supply pipe (member) 26 connected to the cleaning water tank 22. It is screwed so as to be detachable in a state. A rinsing water supply pipe (member) 30 connected in communication with the rinsing water tank 24 is coaxially disposed inside the washing water supply pipe 26, and an upper end of the supply pipe 30 facing the first header 28. A cylindrical second header 32 as a flow path member is detachably screwed to the part. A nozzle holder 34 to which the plurality of cleaning nozzles 16 are connected in communication is mounted on the first header 28 and the second header 32 so as to be horizontally rotatable. The nozzle holder 34 is a cylindrical member, and a cylindrical lower support 36 disposed on the inner lower side of the nozzle holder 34 is slidably fitted to the first header 28. A cylindrical upper support 38 disposed on the inner upper side of the second header 32 is slidably fitted to the second header 32. That is, a cleaning water flow path is defined inside the cleaning water supply pipe 26, the first header 28, and the nozzle holder 34, and the cleaning water supplied from the cleaning water tank 22 to the spray assembly 20 is used for the cleaning water. It is supplied to each cleaning nozzle 16 via a flow path. As the material of the upper and lower supports 36, 38, a plastic resin or the like that is slippery and can withstand the high temperature of the washing water is preferably used, and the headers 28, 32 are made of, for example, stainless steel.
[0011]
The hollow support base 40 to which the plurality of rinsing nozzles 18 are communicated is formed with an insertion hole 40a extending vertically through the hollow interior. A bolt shaft (member) is formed in the insertion hole 40a. ) 42 is inserted and arranged. The bolt shaft 42 has a hollow portion 42a that opens at the lower end (one end) in the shaft portion along the axial direction, and is close to a head portion 42b formed at the upper end (the other end) of the shaft portion. A through-hole 42c that communicates the hollow portion of the support base 40 and the hollow portion 42a is opened at a position orthogonal to the shaft center, and further on the outer periphery of the lower end portion of the shaft portion, a predetermined length along the axial direction from the lower end A male screw 42d is engraved in the area. Then, a bolt shaft 42 is inserted into the insertion hole 40a of the support base 40 from above, and a lower end male screw 42d protruding downward from the base 40 is connected to an upper female screw 32c (described later) of the second header 32. The bolt shaft 42 is fixed by screwing to the bolt shaft 42, and the support base 40 and the rinsing nozzle 18 are supported by the bolt shaft 42 so as to be horizontally rotatable.
[0012]
The through hole 42c of the bolt shaft 42 is set so as to communicate with the hollow interior of the support base 40 when attached to the second header 32. That is, a rinse water flow path is defined inside the rinse water supply pipe 30, the second header 32, the bolt shaft 42 and the support base 40, and rinse water supplied from the rinse water tank 24 to the injection assembly 20. Is supplied to each rinsing nozzle 18 via a rinsing water flow path. In the embodiment, the nozzle header 44 is constituted by the wash water supply pipe 26, the rinse water supply pipe 30, the first header 28, the second header 32, and the bolt shaft 42 that can be attached to and detached from each other. Further, a resin washer 46 is externally fitted to a bolt shaft 42 facing the nozzle holder 34 and the support base 40, and the nozzle holder 34 and the support base 40 positioned vertically with the washer 46 interposed therebetween. It is configured to be able to rotate smoothly.
[0013]
On the outer periphery of the second header 32, a flange 32a extending in the radial direction is formed at a substantially intermediate position in the longitudinal direction, and the nozzle holder 34 is attached to the second header 32 as shown in FIG. The lower end of the externally fitted upper support 38 is positioned so as to be slidably supported by the flange 32a. Further, a reduced-diameter valve seat 48 is formed inside the second header 32, and a valve body 54 of a check valve 50 described later is seated on the valve seat 48 from above, thereby sandwiching the valve seat 48. It is configured to block communication between the upper and lower flow paths. Further, a lower female screw 32 b is screwed into the second header 32 below the valve seat 48, and the lower female screw 32 b is screwed into a male screw 30 a formed on the outer periphery of the upper end portion of the rinse water supply pipe 30. At the same time, an upper female screw 32c is screwed into the upper side of the valve seat 48, and a male screw 42d of the bolt shaft 42 is screwed into the upper female screw 32c.
[0014]
A stepped portion 32d is formed on the inner peripheral surface of the second header 32 above the valve seat 48, and the holder 52 of the check valve 50 is screwed into the stepped portion 32d and the upper female screw 32c. 42 so as to be positioned from above and below. The holder 52 is provided with a valve body 54 slidable up and down, and the valve body 54 is configured to block communication between the upper and lower flow paths when the valve body 54 is seated on the valve seat 48. A plurality of through holes 52a are formed in the holder 52, and when the valve body 54 is pushed up by the rinse water supplied from the rinse water supply pipe 30 and separated from the valve seat 48 as will be described later, Flows into the hollow portion 42a of the bolt shaft 42 through the through hole 52a.
[0015]
[Effect of the embodiment]
Next, the operation of the nozzle structure of the dishwasher according to the embodiment will be described below. When a cleaning process is started in the dishwasher 10, cleaning water is supplied from the cleaning water supply pipe 26 to the cleaning nozzles 16 via the first header 28 and the nozzle holder 34, and the cleaning chamber is supplied from the injection holes. 14 is injected. At this time, the cleaning nozzle 18 and the nozzle holder 34 are horizontally rotated in a predetermined direction around the first and second headers 28 and 32 by the reaction force of the cleaning water, and the tableware stored in the cleaning chamber 14 (FIG. Efficiently).
[0016]
Here, there is a slight gap between the headers 28 and 32 and the upper and lower supports 36 and 38 so that the nozzle holder 34 is smoothly rotated via the first and second headers 28 and 32. is there. Similarly, there is a slight gap between the support base and the bolt shaft 42 so that the support base 40 on which the rinse nozzle 18 is disposed is smoothly rotated via the bolt shaft 42. Therefore, the cleaning water supplied to the nozzle holder 34 passes between the second header 32 and the upper support 38, the bolt shaft 42 and the washer 46, and between the sliding surfaces of the bolt shaft 42 and the support base 40. May flow into the hollow portion 42a through the through hole 42c. That is, the cleaning water flow path and the rinsing water flow path defined in the nozzle header 44 communicate with each other through the through hole 42c of the bolt shaft 42, and the cleaning water that flows back through the rinsing water flow path is used. Rinse water may be contaminated. However, in the embodiment, the check valve 50 is provided in the second header 32 which is disposed upstream of the through hole 42c which is a communication portion of both flow paths and forms a flow path for rinsing water. The washing water is prevented from flowing back into the rinsing water tank 24 in which the rinsing water is stored to contaminate the rinsing water.
[0017]
Next, when the rinsing operation is started, when the rinsing water is supplied to the rinsing water supply pipe 30, the valve body 54 is lifted and separated from the valve seat 48 by the supply water pressure to communicate the upper and lower flow paths. The rinsing water is supplied to each rinsing nozzle 18 via the bolt shaft 42 and the support base 40, and is sprayed into the cleaning chamber 14 from the spray hole in the same manner as the cleaning nozzle 16. Also in the case of this rinsing nozzle 18, the tableware is rotated horizontally in a predetermined direction around the bolt shaft 42 together with the support base 40 by the reaction force of the rinsing water, so that the tableware is efficiently rinsed. When the supply of the rinsing water to the rinsing water supply pipe 30 is stopped, the valve body 54 is lowered by its own weight, and is seated on the valve seat 48 to block the communication between the upper and lower flow paths.
[0018]
When performing maintenance such as when the check valve 50 is clogged with dust or the like, the injection assembly 20 is disassembled. At this time, the bolt shaft 42 is first loosened from the second header 32, and the rinsing nozzle 18 and the support base 40 are removed together with the bolt shaft 42. In this state, the nozzle holder 34 in which the cleaning nozzle 16 is disposed is removed upward with respect to the first and second headers 28 and 32, and then the second header 32 is loosened from the rinse water supply pipe 30. . Thereby, the check valve 50 can be easily removed from the second header 32 and cleaned. That is, the check valve 50 can be cleaned, inspected, or replaced easily and in a short time, and can always be kept hygienic. In addition, since the fixing of the check valve 50 to the header 32 is released by loosening the bolt shaft 42 from the second header 32, the second header 32 is rinsed when the check valve 50 is replaced. It is possible to carry out the process while attached to the water supply pipe 30. Also, the assembly of the injection assembly 20 can be easily performed by assembling the parts in the reverse order of the disassembling operation described above.
[0020]
【The invention's effect】
As described above, according to the nozzle structure of the dishwasher according to the present invention, the flow path member that forms the rinse water flow path upstream of the portion where the flow path for the wash water and the flow path for the rinse water communicate with each other. Since the check valve is provided on the member, the check water can be prevented from flowing back into the rinse water flow path, and the check valve can be easily maintained in a short time.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a nozzle structure of a dishwasher according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing the nozzle structure of the embodiment in an exploded state.
FIG. 3 is a schematic configuration diagram illustrating a dishwasher according to an embodiment.
[Explanation of symbols]
16 Washing nozzle, 18 Rinsing nozzle, 26 Washing water supply pipe (member)
28 First header (member), 30 Rinsing water supply pipe (member)
32 Second header (flow path member), 42 Bolt shaft (member), 42c through hole, 44 Nozzle header 50 Check valve , 52 Holder, 54 Valve body

Claims (1)

The cleaning nozzle (16) and the rinsing nozzle (18) are detachably mounted in a rotatable state on the nozzle header (44), and are connected to the cleaning nozzle (16) via the cleaning water passage in the nozzle header (44). In the dishwasher configured to supply rinsing water to the rinsing nozzle (18) through the rinsing water flow path in the nozzle header (44) while supplying the rinsing water,
The nozzle header (44) includes a cleaning water supply pipe (26), a cylindrical first header (28) that is detachably threadedly connected to an end of the cleaning water supply pipe (26), and A rinsing water supply pipe (30) disposed coaxially inside the washing water supply pipe (26) and an end of the rinsing water supply pipe (30) facing the first header (28) can be attached and detached. A cylindrical second header (32) that is screwed to the second header (32), and a hollow bolt shaft (42) that is detachably screwed to the end of the second header (32) in a communicating state ;
The washing water flow path defined inside the washing water supply pipe (26) and the first header (28) communicates with the washing nozzle (16), and the rinse water supply pipe (30), the second The rinse water flow path defined inside the header (32) and the bolt shaft (42) communicates with the rinse nozzle (18) through the through hole (42c) of the bolt shaft (42),
From the bolt shaft (42) side to the rinsing water supply pipe (30) inside the second header (32) located upstream from the portion where the washing water flow path and the rinsing water flow path communicate with each other . A check valve (50) for stopping the flow of water, and the check valve (50) includes a holder (52) clamped from above and below by the bolt shaft (42) and the second header (32), A nozzle structure for a dishwasher, comprising: a valve body (54) arranged to be slidable up and down with respect to the holder (52) .

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