JP2008000462A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher capable of suppressing deterioration of a packing disposed at a joining part of water pipes for passing wash water for washing tableware due to corrosive gas. <P>SOLUTION: A packing 4 preventing water leakage from the joining part is disposed at the joining part between a drain pipe 2 and a connecting pipe 3 for passing wash water, and a water storage space S1 for storing the wash water is formed covering the upper face 4a of the packing 4. The inside diameter of the drain pipe 2 is longer than the outside diameter of the connecting pipe 3, one end of the connecting pipe 3 is inserted into one end of the drain pipe 2, the packing 4 is interposed between the inner face 2b of the drain pipe 2 and the outer face 3a of the connecting pipe 3, and the water storage space S1 is formed by being surrounded with the inner face 2b, the outer face 3a and the upper face 4a. That is to say, the upper face 4a is disposed on the base of the water storage space S1 and, even if ozone gas mixed in the wash water is emitted in air, the wash water covering the upper face 4a suppresses the direct contact between the packing 4 and the ozone gas. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dishwasher that cleans dishes such as dishes, chopsticks, and cups of water, and also assists in cleaning by sterilizing, deodorizing, and bleaching the interior of the dishes and itself.

The dishwasher includes a tableware container for storing tableware to be cleaned, a cleaning tank for storing cleaning water for cleaning the tableware in the tableware table, and a cleaning nozzle having an injection port for spraying the cleaning water onto the tableware. And a cleaning pump for circulating the cleaning water stored in the cleaning tank and injecting it from the injection port.
The dishwasher includes a heater that heats the washing water stored in the washing tank. When the dishwasher has a dish drying function, this heater is also used to heat the air in the washing tank.

Furthermore, conventionally, a dishwasher including an ozone generator has been proposed (see Patent Document 1).
The ozone gas generated by the ozone generator is mixed into the cleaning water in the tableware washing process and the rinsing process.

  The cleaning water is sterilized by the oxidizing power of the ozone gas mixed in the cleaning water. In addition, the cleaning water mixed with ozone gas is sterilized by jetting the cleaning water from the nozzle of the cleaning nozzle, and the cleaning water mixed with ozone gas is circulated, so that the cleaning water is circulated. The flowing water pipes, cleaning pumps, etc., are sterilized. Furthermore, generation of various germs inside the dishwasher is suppressed, and the remaining vegetables, sewage and the like attached to the tableware are deodorized.

By the way, when the dishwasher also has a tableware drying function, the air heated by the heater is blown into the washing tank. By mixing ozone gas into the blown air, the dishes, tableware bowls, washing tanks, etc. are bleached. Is done.
As described above, ozone gas is used as a corrosive gas for dishwashing assistance.

Now, the packing which prevents the water leakage from a junction part is distribute | arranged to the junction part of the flowing water pipes through which the washing water which circulates the inside of a dishwasher flows.
FIG. 6 is a longitudinal sectional view showing a configuration of a joint portion between a drain pipe 61 and a connection pipe 62 provided in a conventional dishwasher.

The drain pipe 61 is a flowing water pipe through which the cleaning water discharged from the cleaning tank 60 flows, and protrudes in the vertical direction integrally with the bottom of the cleaning tank 60.
The connecting pipe 62 is a flowing water pipe that connects the drain pipe 61 and a water suction port of a cleaning pump (not shown), and is arranged below the drain pipe 61 in the vertical direction.
The washing water flows through the drain pipe 61 and the connecting pipe 62 in this order from top to bottom, that is, in the direction of the white arrow W.

The drain pipe 61 and the connecting pipe 62 are each made of a cylindrical synthetic resin, and are joined via an annular packing 63 made of synthetic rubber.
Specifically, the inner diameter of the connecting pipe 62 is longer than the outer diameter of the drain pipe 61, and the drain pipe 61 is inserted into the connecting pipe 62. The packing 63 is interposed between the inner surface of the connection pipe 62 and the outer surface of the drain pipe 61.

Since the drainage pipe 61 and the connecting pipe 62 wash water flows during the tableware washing process and the rinsing process, the lower surface 63a of the packing 63 is submerged.
On the other hand, after the washing process and the rinsing process are finished, the washing water flowing through the drain pipe 61 and the connection pipe 62 is discharged to the outside of the dishwasher, for example, so that the lower surface 63a of the packing 63 is exposed to the air in the connection pipe 62. Is done.
The upper surface, inner peripheral surface, and outer peripheral surface of the packing 63 are in close contact with the outer surface of the bottom of the cleaning tank 60, the outer peripheral surface of the drain pipe 61, and the inner peripheral surface of the connection pipe 62, and are in direct contact with the cleaning water and air, respectively. There is almost no.
JP-A-2-77223

The ozone gas mixed in the washing water moves from the washing water to the air, and further moves from the bottom to the top, that is, in the direction of arrow G in FIG.
For this reason, ozone gas may directly contact the lower surface 63a of the packing 63 exposed to the air in the connection pipe 62.
Since the ozone gas is a corrosive gas that corrodes the synthetic rubber, the packing 63 is deteriorated by the ozone gas, and the deteriorated packing 63 has a reduced water leakage prevention function. As a result, water leakage may occur from the joint between the drain pipe 61 and the connection pipe 62.

  In order to prevent water leakage due to deterioration of the packing 63, it is conceivable that the packing 63 is frequently replaced with a new one. However, it is necessary for the user or manufacturer of the dishwasher to bear the cost of replacing parts. The dishwasher cannot be used until 63 is replaced, and there is a problem that convenience for the user is lowered.

  However, Patent Document 1 does not mention any means for suppressing deterioration of packing caused by ozone gas.

  This invention is made | formed in view of such a situation, The main objective is the packing distribute | arranged to the junction part in the water storage space formed in the junction part vicinity of a 1st water flow pipe and a 2nd water flow pipe. It is providing the dishwasher which can suppress that packing deteriorates by corrosive gas by setting it as the structure which stores wash water so that the surface of this may be coat | covered.

  Another object of the present invention is to provide cleaning water in the water storage space surrounded by the inner surface of the first water pipe, the outer surface of the second water pipe inserted into one end of the first water pipe, and the surface of the packing. The dishwasher can store water in the water storage space above the packing when the first water pipe is arranged on the upper side and the second water pipe is arranged on the lower side, respectively. It is to provide.

  Another object of the present invention is to provide an inlet through which cleaning water flows into a water storage space surrounded by a flange formed on the outer surface of each of the first flow pipe and the second flow pipe and the surface of the packing. For example, when the first flowing water pipe is arranged on the upper side and the second flowing water pipe is arranged on the lower side, respectively, the water can be stored in the side water storage space of the packing. It is to provide a dishwasher that can.

  Still another object of the present invention is to store the wash water through the inlet into which the wash water flows into the water storage space inside the water storage flange formed on the outer surface of the second water pipe, for example, An object of the present invention is to provide a dishwasher capable of storing water in a water storage space below the packing when the first water pipe is arranged on the upper side and the second water pipe is arranged on the lower side.

  In the dishwasher according to the present invention, a packing for preventing water leakage from the joint is disposed at the joint between the first water pipe and the second water pipe through which wash water for washing the dishes flows, In a dishwasher including a gas generation unit for mixing auxiliary corrosive gas into the cleaning water, a water storage space for storing the circulating cleaning water so as to cover the surface of the packing is in the vicinity of the joint. It is formed.

  In the dishwasher according to the present invention, the inner diameter of the first end of the first flowing water pipe is longer than the outer diameter of the second end of the second flowing water pipe, and the second end is at the first end. The packing is interposed between the inner surface of the first end and the outer surface of the second end, and the water storage space is surrounded by the inner surface, the outer surface, and the surface. It is characterized by.

  In the dishwasher according to the present invention, a flange is provided on each outer surface of one end of the first flowing water pipe and the second flowing water pipe, and the packing is interposed between the flanges, The water storage space is surrounded by the flange and the surface, and an inflow port through which the washing water flows into the water storage space is formed.

  The dishwasher according to the present invention has a bottom part protruding from the outer surface of the second water pipe, and a side part protruding from the bottom part to the outside of the outer surface of the first water pipe, and the water storage space is formed therein. And the packing is interposed between the inner surface of the side portion and the outer surface of the first water pipe, and an inflow port through which the cleaning water flows into the water storage space is formed. It is characterized by that.

In the present invention, there is a water storage space for storing the wash water so that the wash water covers the surface of the packing in the vicinity of the joint between the first and second flow pipes through which the wash water for washing the dishes flows. Is formed. For this reason, the surface of the packing forms the bottom surface, top surface, side surface, and the like of the water storage space. In other words, spaces for storing water are provided above, below, on the sides, etc. of the packing.
Here, the wash water stored in the water storage space is the wash water flowing through the first flow pipe and / or the second flow pipe.

  The packing is arranged at the joint to prevent water leakage from the joint, and the surface of the packing is covered with the cleaning water stored in the water storage space. Since this cleaning water inhibits the contact between the surface of the packing and the air, the corrosive gas for assisting in cleaning the dishes generated by the gas generating unit is suppressed from coming into direct contact with the surface of the packing.

In the present invention, the inner diameter of the first end of the first water pipe is longer than the outer diameter of the second end of the second water pipe, and the second water pipe is connected to the first end of the first water pipe. The second end is inserted.
The water storage space is a space surrounded by the inner surface of the first end of the first water pipe, the outer surface of the second end of the second water pipe, and the surface of the packing interposed therebetween, Wash water is stored in this water storage space.

  For example, when the first water pipe is arranged substantially vertically on the upper side and the second water pipe is arranged substantially vertically on the lower side, the water storage space provided above the packing surrounding the second water pipe The wash water flowing from the first flowing water pipe (second flowing water pipe) to the second flowing water pipe (first flowing water pipe) flows in. At this time, a water storage space surrounded by the inner surface of the first end of the first water pipe, the outer surface of the second end of the second water pipe, and the surface of the packing serves as a water receiver, Stored naturally.

In this invention, the flange is provided in each outer surface of the one end part of the joining side of a 1st flowing water pipe and a 2nd flowing water pipe. Moreover, the inflow port into which the wash water which distribute | circulates a 1st flowing water pipe and / or a 2nd flowing water pipe flows in into a water storage space is formed.
The water storage space is a space surrounded by the flange of the first water pipe, the flange of the second water pipe, and the surface of the packing interposed therebetween, and the water storage space passes through the inlet. The flowing wash water is stored.

  For example, when the first flowing water pipe is arranged substantially vertically on the upper side and the second flowing water pipe is arranged substantially vertically on the lower side, the side of the packing surrounding the second flowing water pipe (the second flowing water pipe of the packing) Wash water flowing from the first water pipe (second water pipe) to the second water pipe (first water pipe) flows into the water storage space provided on the inner side in the radial direction of the water through the inlet. , Stored naturally.

In the present invention, the water storage flange has a bottom part protruding from the outer surface of the second water pipe and a side part protruding from the bottom part to the outside of the outer surface of the first water pipe. The packing is interposed between the inner side surface of the water storage flange and the outer surface of the first water pipe. Moreover, the inflow port into which the wash water which distribute | circulates a 1st flowing water pipe and / or a 2nd flowing water pipe flows in into a water storage space is formed.
The water storage space is a space surrounded by the inside of the water storage flange, that is, the side inner surface and the bottom inner surface (and the outer surface of the second water pipe) of the water storage flange, and flows into the water storage space through the inlet. Wash water is stored.

  For example, when the first flowing water pipe is arranged substantially vertically on the upper side and the second flowing water pipe is arranged substantially vertically on the lower side, the water storage space provided below the packing surrounding the first flowing water pipe, That is, the wash water flowing from the first flowing water pipe (second flowing water pipe) to the second flowing water pipe (first flowing water pipe) flows into the water storage flange and is naturally stored.

In the case of the dishwasher according to the present invention, the corrosive gas is prevented from coming into direct contact with the surface of the packing, so that the corrosive gas directly in contact with the packing is prevented from corroding and deteriorating the packing.
If the packing is deteriorated, the deteriorated packing may not prevent water leakage and may leak from the joint.

  That is, by forming a water storage space for storing the cleaning water so as to cover the surface of the packing, it is possible to suppress the deterioration of the packing due to the ozone gas, and even if corrosive gas is used for dishwashing assistance. The durability of the packing can be improved. As a result, water leakage from the joint can be suppressed.

Moreover, the thing which covers the surface of packing is the wash water which distribute | circulates a 1st flowing water pipe and / or a 2nd flowing water pipe. In other words, there is no need to separately prepare other liquids to be stored in the water storage space, and it is not necessary to provide a separate water pipe for injecting washing water into the water storage space. There is no need to inject cleaning water into the space.
For this reason, the means which inhibits contact with corrosive gas and packing can be formed easily and at low cost, and a user's convenience can be improved.

  Furthermore, since the surface of the packing is covered with the cleaning water, the surface of the packing is difficult to dry even after the cleaning of the dishes, and therefore, the deterioration of the packing due to excessive drying can be suppressed.

Furthermore, even if leftovers are contained in the washing water, the surface of the packing is difficult to dry, so that the dried leftovers are prevented from sticking to the packing. For this reason, for example, the surface of the packing is washed with the washing water newly flowing into the storage space, and the leftovers are removed. That is, the dishwasher can be easily kept clean.
If the dried leftovers are stuck to the packing, for example, when a dishwasher cleaner removes the leftovers stuck to the packing, the packing may be damaged to deteriorate the packing.

  In the case of the dishwasher according to the present invention, water can be naturally stored in the water storage space with a simple configuration.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.

Embodiment 1.
FIG. 1 is a schematic front view of a dishwasher 1 according to Embodiment 1 of the present invention.
The dishwasher 1 in the present embodiment is a dishwasher having a dishwashing function and a dish drying function.

The dishwasher 1 stores washing water for washing the dishes A, A,... And a washing tub 11 containing a dish bowl 13 for placing the dishes A, A,. 10 inside.
At the bottom of the washing tank 11, a plurality of injection nozzles 12 and 12 for injecting cleaning water to the dishes A, A,... On the tableware bowl 13 while rotating are arranged. The tableware bowl 13 is supported using a support rail.

The dishwasher 1 includes a washing pump 14 that supplies pressurized water to the spray nozzles 12 and 12 via a distribution valve (not shown), a heater 15 that heats the washing water stored in the washing tank 11, and dishes A, A,. In the washing process and the rinsing process, an ozone generator (gas generating part) 5 for mixing ozone gas as a corrosive gas for assisting dish washing into the washing water, and a control device 16 for controlling the operation of each part of the dishwasher 1 And.
However, as will be described later, the heater 15 is used for both cleaning and drying of the dishes A, A,.

The cleaning pump 14 includes a cleaning motor 141 for driving the cleaning pump 14, a suction hose 142 for the cleaning pump 14 to suck the cleaning water into the cleaning pump 14, and a discharge of the sucked cleaning water to the jet nozzles 12 and 12. The discharge hose 143 is connected to a drainage hose 144 for discharging the sucked washing water from the drainage port 144a to the outside of the dishwasher 1.
Either the discharge of the wash water from the discharge hose 143 or the discharge of the wash water from the drain hose 144 is executed by switching the direction of the distribution valve by the control device 16.

The leftovers attached to the dishes A, A,... Are mixed into the washing water by washing the dishes A, A,..., But the washing water mixed with the leftovers is leftovers arranged at the bottom of the washing tank 11. Filtered by a filter 19.
The filtered leftovers remain on the leftover filter 19, and the filtered wash water is provided at the bottom of the drain receiver 110 via the drain receiver 110 provided below the bottom of the cleaning tank 11. It flows into the drain pipe 2.
The washing water that has flowed into the drain pipe 2 passes through the drain pipe 2, and further passes through the connection pipe 3 that connects the drain pipe 2 and the suction hose 142, and is sucked into the washing pump 14.

Next, the circulation of cleaning water will be described.
In the cleaning process or the rinsing process of the tableware A, A,..., The water supply valve 171 is opened by the control device 16, and tap water as cleaning water is supplied from the water supply port 172 to the cleaning tank 11 and stored.
The washing water stored in the washing tank 11 passes through the leftover filter 19 disposed at the bottom of the washing tank 11, passes through the drain pipe 2, the connecting pipe 3, and the suction hose 142 in this order, and is washed by the washing pump 14. Pressurized and sprayed uniformly from the injection nozzles 12 and 12 through the discharge hose 143 to the inner surface of the washing tub 11, the tableware bowl 13, the tableware A, A,.

The ozone generator 5 is connected to the discharge hose 143, and the ozone gas generated by the ozone generator 5 is blown into the wash water passing through the discharge hose 143. For this reason, ozone gas is mixed into the cleaning water, and the cleaning water mixed with the ozone gas is sprayed from the spray nozzles 12 and 12.
Wash water mixed with ozone gas is sterilized by the oxidizing power of ozone gas. In addition, the inner surface of the cleaning tank 11, the tableware bowl 13, the tableware A, A,... Are sterilized by the cleaning water mixed with ozone gas.

  The cleaning water sprayed from the spray nozzles 12 and 12 is stored again in the cleaning tank 11 in a state in which ozone gas is mixed, passes through the leftover filter 19, and further drains 2, connection pipe 3, and suction hose. 142, the washing pump 14, and the discharge hose 143, and again injected from the injection nozzles 12 and 12. During this time, the flow path of the cleaning water is sterilized by the cleaning water mixed with ozone gas.

  After completion of the cleaning process or the rinsing process of the dishes A, A,..., The cleaning water stored in the cleaning tank 11 passes through the leftover filter 19, and the drain pipe 2, the connecting pipe 3, and the suction hose 142 are arranged in this order. It passes through the drainage hose 144 and is discharged to the outside of the dishwasher 1 through the drainage hose 144 by the washing pump 14. At this time, the flow path of the cleaning water is sterilized by the cleaning water mixed with ozone gas.

After the washing process or the rinsing process for the dishes A, A,..., The dishwasher 1 executes a drying process.
The control device 16 operates the blower fan 18 to suck in outside air from the intake port 181 and heats it with the heater 15 while blowing air into the cleaning tank 11 through the blower duct 182. The heated outside air passes through gaps such as the tableware bowl 13 and the tableware A, A,..., And is discharged to the outside of the dishwasher 1 from an exhaust port 183 provided in the upper part of the washing tank 11.
Therefore, the cleaned dishes A, A,... Are dried.

Also in the drying process of the dishes A, A,..., The control device 16 operates the ozone generator 5. In this case, ozone gas is blown into the cleaning tank 11, and the inside of the cleaning tank 11, the tableware bowl 13, the tableware A, A,.
By using ozone gas as described above, generation of various germs in the dishwasher 1 is suppressed, and the remaining vegetables attached to the dishes A, A,. Leftovers) and the inside of the dishwasher 1 are deodorized.
The ozone generator 5 is not limited to the configuration connected to the discharge hose 143, and may be connected to the drain receiver 110, for example.

Next, the configuration of the joint portion between the drain pipe 2 and the connection pipe 3 will be described in detail.
FIG. 2 is a longitudinal sectional view showing a configuration of a joint portion between the drain pipe 2 and the connection pipe 3.
The drain pipe 2 is made of a synthetic resin, and is a cylindrical first water pipe through which wash water discharged from the wash tank 11 through the leftover filter 19 flows and is arranged substantially vertically.
The end of the drainage pipe 2 on the washing water inflow side is provided integrally with the bottom of the drainage receiver 110, and the outflow side end (first end) 20 is joined to the connection pipe 3.

The connecting pipe 3 is made of a synthetic resin and is a cylindrical second flowing water pipe through which the washing water flowing out from the drain pipe 2 flows, and is arranged substantially vertically.
The end of the connection pipe 3 on the outflow side of the washing water is joined to the suction hose 142, and the end of the inflow side (second end) 30 is joined to the drain pipe 2.

  On the outer surface 3a in the vicinity of the inflow side end 30 of the connecting pipe 3, a circular flat flange 31 is projected. From the end of the inflow side end portion 30 to the projecting position of the flange 31, a predetermined distance is provided.

The drain pipe 2 and the connection pipe 3 are joined together by, for example, screw tightening via an elastic packing 4.
The packing 4 is made of synthetic rubber and has an annular shape in plan view with a rectangular cross section. The inner diameter is slightly smaller than the outer diameter of the inflow side end 30 of the connection pipe 3, and the outer diameter is the outflow side of the drain pipe 2. It is slightly larger than the inner diameter of the end portion 20. Further, the thickness of the packing 4 is smaller than the predetermined distance.
Since the packing 4 seals the joint between the drain pipe 2 and the connection pipe 3, water leakage from the joint is prevented.

The inner diameter of the outflow side end 20 of the drain pipe 2 is longer than the outer diameter of the inflow side end 30 of the connection pipe 3, and the inflow side end 30 is inserted into the outflow side end 20. At this time, the outflow side end 20 terminal abuts on the upper surface of the flange 31.
Further, in the packing 4, the inner peripheral surface of the packing 4 tightly surrounds the inflow side end portion 30, and further, the outer peripheral surface of the packing 4 is tightly surrounded by the outflow side end portion 20, and the upper surface 4 a of the packing 4 is inside the drain pipe 2. The drain pipe 2 and the connecting pipe 3 are arranged at the joint portion so that the lower surface is in close contact with the flange 31. That is, the packing 4 is interposed between the inner surface 2 b of the outflow side end portion 20 of the drain pipe 2 and the outer surface 3 a of the inflow side end portion 30 of the connection pipe 3.

In the vicinity of the joint portion between the drain pipe 2 and the connecting pipe 3, the inner surface 2 b of the outflow side end 20, the outer surface 3 a of the inflow side end 30, and the upper surface 4 a of the packing 4 are surrounded by the upper side. An annular space having an opening in plan view is formed.
The washing water flows through the drain pipe 2 and the connecting pipe 3 in this order from top to bottom, that is, in the direction of the white arrow W.

For this reason, the wash water which distribute | circulates the drain pipe 2 is stored naturally in the said space, and the said space functions as the water storage space S1 which stores the wash water which distribute | circulates.
The upper surface 4a of the packing 4 is disposed on the bottom surface of the water storage space S1, and is covered with the cleaning water stored in the water storage space S1.

After the washing process or the rinsing process of the dishes A, A,..., The washing water is discharged to the outside of the dishwasher 1, but the washing water remains in the water storage space S1.
Since the ozone gas mixed in the cleaning water stored in the water storage space S1 moves from the bottom to the top in the cleaning water and is emitted into the air, the ozone gas does not directly contact the packing 4.

  In addition, even if the ozone gas emitted into the air from the wash water remaining in the dishwasher 1 after the discharge of the wash water or the ozone gas generated during the drying process passes through the drain pipe 2 and the connecting pipe 3, the water storage space Since cleaning water is stored in S <b> 1 so as to cover the upper surface 4 a of the packing 4, such ozone gas does not directly contact the packing 4.

  That is, the water storage space S1 surrounded by the inner surface 2b, the outer surface 3a, and the upper surface 4a prevents the packing 4 positioned below the water storage space S1 from being directly exposed to ozone gas.

Here, the surfaces other than the upper surface 4a (the lower surface, the outer peripheral surface, and the inner peripheral surface) of the packing 4 are in close contact with the upper surface of the flange 31, the inner surface 2b, and the outer surface 3a. Never do.
By the way, during the washing process or the rinsing process of the tableware A, A,..., The inside of the drain pipe 2 and the connection pipe 3 are totally submerged, so that ozone gas does not directly contact the packing 4.

The dishwasher 1 as described above is a dishwasher of a type in which the ozone generator 5 is provided and ozone gas is mixed into the washing water, and a space is provided above the packing 4 at the pipe joint of the dishwasher 1. By storing the wash water in the space, the ozone gas is not in direct contact with the packing 4. For this reason, deterioration of the packing 4 by ozone gas is suppressed, and durability of the packing 4 is improved.
Moreover, the shape of each of the outflow side end 20 of the drain pipe 2 and the inflow side end 30 of the connection pipe 3 is very simple, and the configuration is simple.

Embodiment 2. FIG.
FIG. 3 is a longitudinal sectional view showing a configuration of a joint portion between drain pipe 200 and connection pipe 300 provided in the dishwasher according to Embodiment 2 of the present invention.

The drainage pipe 200 and the connection pipe 300 in the present embodiment are substantially the same flow pipes as the drainage pipe 2 and the connection pipe 3 of the first embodiment, but the inner diameter and the outer diameter of each are substantially equal, and each is substantially It is arranged horizontally.
For this reason, the outflow side end 20 end of the drainage pipe 200 and the inflow side end 30 end of the connection pipe 300 are opposed to each other and are not inserted.
The drainage pipe 200 and the connection pipe 300 are joined together by, for example, screw tightening via an elastic packing 400 having a rectangular cross section in a plan view and having elasticity.

  On the outer surface 2 a of the outflow side end 20 of the drain pipe 200, a circular flat flange 22 is projected.

A flange 32 protrudes from the outer surface 3 a near the inflow side end 30 of the connection pipe 300.
The flange 32 has an annular flat plate-like flange base portion 32a protruding from the outer surface 3a, and a cylindrical flange edge portion 32b protruding substantially perpendicularly from the flange base portion 32a to the drain pipe 200 side.
The protruding length of the flange edge portion 32b from the flange base portion 32a is slightly shorter than the thickness of the packing 400, and the length from the end of the inflow side end portion 30 to the protruding position of the flange base portion 32a is slightly longer than the protruding length.
Further, the inner diameter of the flange edge portion 32 b is slightly shorter than the outer diameter of the packing 400.

  Further, the packing 400 has a drain pipe 200 and a connecting pipe 300 so that the outer peripheral surface of the packing 400 is tightly surrounded by the inner surface of the flange edge portion 32b and the one surface and the other surface of the packing 400 are sandwiched between the inner surface of the flange 22 and the flange base portion 32a. It is arranged at the joint part. That is, the packing 400 is interposed between the flange 22 and the flange 32.

The water storage space S <b> 2 is surrounded by the flange 22 and the flange 32, the outer surface 3 a of the inflow side end 30, and the inner peripheral surface 4 b of the packing 400.
The outflow side end 20 of the drain pipe 200 is formed with a tapered surface for guiding the wash water to the water storage space S2, and the space between the taper surface and the end of the inflow side end 30 is washed into the water storage space S2. It functions as an inlet 21 through which water flows in the direction of the arrow in the figure.

  Here, the inflow port 21 is formed so as to be narrower than the width of the water storage space S2. For this reason, the distance between the outflow side end 20 taper surface and the inflow side end 30 terminal is limited. Specifically, the connecting pipe 300 is formed such that the distance from the inner surface of the flange base portion 32a to the end of the inflow side end portion 30 is longer than the protruding length of the flange edge portion 32b from the flange base portion 32a.

The wash water flows from the right to the left in the drawing, that is, in the direction of the white arrow W in this order, through the drain pipe 200 and the connection pipe 300 in this order. Stored in S2.
Since the inlet 21 is narrower than the area of the water storage space S2, the surface tension of the cleaning water stored in the water storage space S2 surpasses the gravity acting on the cleaning water, so that the cleaning water in the water storage space S2 In addition, it is possible to suppress unnecessary flow out of the water storage space S2.
The inner peripheral surface 4b of the packing 400 is disposed on the peripheral surface of the water storage space S2, and is covered with the cleaning water stored in the water storage space S2.

After the washing process or the rinsing process of the dishes A, A,..., The washing water is discharged to the outside of the dishwasher 1, but the washing water remains in the water storage space S2.
For example, even when ozone gas diffused from the cleaning water into the air passes through the drain pipe 200 and the connection pipe 300, the cleaning water is stored in the water storage space S2 so as to cover the inner peripheral surface 4b of the packing 400. Therefore, such ozone gas does not contact the packing 400 directly.

  Here, since the surfaces (both surfaces and the outer peripheral surface) other than the inner peripheral surface 4b of the packing 400 are in close contact with the flange 22, the flange base portion 32a, and the flange edge portion 32b, they are directly exposed to ozone gas like the inner peripheral surface 4b. Never touch.

  The dishwasher 1 as described above has a structure in which ozone gas is not in direct contact with the packing 400 by providing a space inside the packing 400 at the pipe joint of the dishwasher 1 and storing cleaning water in this space. Yes. For this reason, deterioration of the packing 400 by ozone gas is suppressed, and durability of the packing 400 is improved.

The inner diameter of the outflow side end 20 of the drain pipe 200 is made larger than the outer diameter of the inflow side end 30 of the connection pipe 300, and the inflow side end 30 is inserted into the outflow side end 20. The air gap between the inner surface 2 b of 20 and the outer surface 3 a of the inflow side end 30 may serve as the inlet 21.
Further, the flow direction of the washing water may be the reverse direction.

Embodiment 3. FIG.
In the present embodiment, a configuration different from that of the second embodiment of the joint portion between the drain pipe 200 and the connecting pipe 300 will be described, and other parts corresponding to the second embodiment are denoted by the same reference numerals. The description of is omitted.

FIG. 4 is a longitudinal sectional view showing a configuration of a joint portion between drain pipe 200 and connection pipe 300 provided in the dishwasher according to Embodiment 3 of the present invention.
The drainage pipe 200 and the connection pipe 300 in the present embodiment are exactly the same shape as the drainage pipe 200 and the connection pipe 300 in the second embodiment, but are arranged in a substantially vertical direction. A water storage space S3 corresponding to the two water storage spaces S2 is formed.

The water storage space S3 is surrounded by the flange 22 and the flange 32, the outer surface 3a of the inflow side end portion 30, and the inner peripheral surface 4b of the packing 400.
The outflow side end 20 of the drain pipe 200 is formed with a tapered surface for guiding the wash water to the water storage space S3 in the direction of the arrow in the figure, and the gap between the tapered surface and the end of the inflow side end 30 is It functions as the inlet 21 into which the wash water flows into the water storage space S3. Here, the inflow port 21 is formed so as to be narrower than the width of the water storage space S3.

The wash water flows through the drain pipe 200 and the connecting pipe 300 in this order from the top to the bottom in the drawing, that is, in the direction of the white arrow W, and a part of the wash water that flows through the inlet 21 passes through the water storage space. Stored in S3.
The inner peripheral surface 4b of the packing 400 is disposed on the peripheral surface (side surface) of the water storage space S3 and is covered with the cleaning water stored in the water storage space S3.

After the washing process or the rinsing process of the dishes A, A,..., The washing water is discharged to the outside of the dishwasher 1, but the washing water remains in the water storage space S3.
For example, even if ozone gas emitted from the cleaning water into the air passes through the drain pipe 200 and the connection pipe 300, the cleaning water is stored in the water storage space S3 so as to cover the inner peripheral surface 4b of the packing 400. Therefore, such ozone gas does not contact the packing 400 directly.

  In the dishwasher 1 as described above, a space is provided on the side (inside) of the packing 400 at the pipe joint portion of the dishwasher 1, and the cleaning water is stored in this space, so that ozone gas is directly applied to the packing 400. The structure does not contact. For this reason, deterioration of the packing 400 by ozone gas is suppressed, and durability of the packing 400 is improved.

  The drain pipe 200 may be disposed on the lower side and the connection pipe 300 may be disposed on the upper side. In this case, a taper surface for guiding the wash water to the storage space S3 may be formed at the inflow side end portion 30, and between the taper surface and the end of the outflow side end portion 20 the wash water enters the water storage space S3. It functions as the inflow port 21 which flows in.

Embodiment 4 FIG.
In the present embodiment, a configuration different from that of the first embodiment of the joint portion between the drain pipe 2 and the connecting pipe 3 will be described, and other parts corresponding to the first embodiment are denoted by the same reference numerals. The description of is omitted.
FIG. 5 is a longitudinal sectional view showing a configuration of a joint portion between the drain pipe 2 and the connecting pipe 3 provided in the dishwasher according to Embodiment 4 of the present invention.

  On the outer surface 2a in the vicinity of the outflow side end 20 of the drain pipe 2, a circular flat flange 23 projects. From the outflow side end 20 terminal to the projecting position of the flange 23, a predetermined distance is provided. This predetermined distance is preferably longer than the thickness of the packing 4.

A water storage flange 33 projects from the outer surface 3 a in the vicinity of the inflow side end 30 of the connection pipe 3.
The water storage flange 33 includes an annular flat flange bottom portion 33a protruding from the outer surface 3a, and a cylindrical flange side portion protruding substantially vertically from the flange bottom portion 33a to the outside of the outer surface 2a of the outflow side end 20 of the drain pipe 2. 33b. The protruding length of the flange side portion 33b from the flange bottom portion 33a is longer than the predetermined distance.

The inner diameter of the outflow side end 20 of the drain pipe 2 is longer than the outer diameter of the inflow side end 30 of the connection pipe 3, and the inflow side end 30 is inserted into the outflow side end 20. At this time, the front end of the flange side portion 33 b comes into contact with the flange 23.
Further, the packing 4 has an inner peripheral surface that tightly surrounds the outflow side end portion 20, and an outer peripheral surface of the packing 4 that is tightly surrounded by the flange side portion 33 b, and the lower surface 4 c of the packing 4 is disposed on the inner side of the water storage flange 33. The drain pipe 2 and the connecting pipe 3 are arranged at the joint portion so that the direction and the upper surface are in close contact with the flange 23. That is, the packing 4 is interposed between the inner surface of the flange side portion 33 b and the outer surface 2 a of the outflow side end portion 20.

The end of the outflow side end 20 of the drain pipe 2 is disposed opposite to the inner surface of the flange bottom 33a so as to protrude into the water storage flange 33 and spaced from the inner surface. Further, the inner surface 2b of the outflow side end 20 and the outer surface 3a of the connecting pipe 3 are spaced apart. For this reason, an inlet 34 is formed between the inner surface 2b on the upper side of the water storage flange 33 and the outer surface 3a.
The vertical position of the tip of the inflow side end 30 is above the vertical position of the lower surface 4 c of the packing 4.

The inside of the water storage flange 33 is an annular water storage space S4 having an opening on the upper side, and in this water storage space S4, the wash water flowing through the drain pipe 2 from top to bottom, that is, in the direction of the white arrow W, is provided. It is stored naturally through the inlet 34.
The lower surface 4c of the packing 4 is arranged on the top surface of the water storage space S4 and is covered with the cleaning water stored in the water storage space S4.

After the washing process or the rinsing process of the dishes A, A,..., The washing water is discharged to the outside of the dishwasher 1, but the washing water remains in the water storage space S4.
For example, ozone gas that has diffused from the cleaning water into the air passes through the drainage pipe 2 and the connection pipe 3, and the cleaning water is stored in the water storage space S4 so as to cover the lower surface 4 c of the packing 4. Such ozone gas does not contact the packing 4 directly.

  Here, since the surfaces (upper surface, inner peripheral surface, and outer peripheral surface) other than the lower surface 4c of the packing 4 are in close contact with the flange 23, the outer surface 2a, and the flange side portion 33b, as with the lower surface 4c, the surface is directly exposed to ozone gas. There is no contact.

  The dishwasher 1 as described above has a structure in which ozone gas is not in direct contact with the packing 4 by providing a space below the packing 4 in the pipe joint of the dishwasher 1 and storing washing water in this space. Yes. For this reason, deterioration of the packing 4 by ozone gas is suppressed, and durability of the packing 4 is improved.

  For example, when the dimensions of the drain pipe 2 and the connecting pipe 3 are substantially equal, the inflow port 34 may be provided by forming a tapered surface at the outflow side end portion 20 for guiding the wash water to the water storage space S4. At this time, the drain pipe 2 may be arranged on the lower side and the connecting pipe 3 may be arranged on the upper side. In addition, by forming the inlet 34 sufficiently narrow with respect to the size of the water storage space S4, even when the drain pipe 2 and the connection pipe 3 are arranged in a substantially horizontal direction, the cleaning stored in the water storage space S4 is performed. Due to the surface tension of the water, the washing water is prevented from unnecessarily flowing out of the water storage space S4.

In Embodiments 1 to 4, the structure of the joint between the drainage pipes 2 and 200 and the connection pipes 3 and 300 is illustrated. However, the present invention is not limited to this. For example, the connection between the connection pipes 3 and 300 and the suction hose 142 For example, a configuration in which a water storage space such as water storage spaces S1, S2, S3, S4 is provided in the section may be used.
Further, the shape of the packings 4 and 400 is not limited to an annular shape having a rectangular cross section, and for example, the cross section may be circular or L-shaped. Further, the packing 4,400 is not limited to synthetic rubber, and may be made of polyurethane, for example.

It is a schematic front view of the dishwasher according to Embodiment 1 of the present invention. It is a longitudinal cross-sectional view which shows the structure of the junction part of the drain pipe and connection pipe with which the dishwasher which concerns on Embodiment 1 of this invention is provided. It is a longitudinal cross-sectional view which shows the structure of the junction part of the drain pipe and connection pipe with which the dishwasher which concerns on Embodiment 2 of this invention is provided. It is a longitudinal cross-sectional view which shows the structure of the junction part of the drain pipe and connection pipe with which the dishwasher which concerns on Embodiment 3 of this invention is provided. It is a longitudinal cross-sectional view which shows the structure of the junction part of the drain pipe and connection pipe with which the dishwasher which concerns on Embodiment 4 of this invention is provided. It is a longitudinal cross-sectional view which shows the structure of the junction part of the drainage pipe and connection pipe with which the conventional dishwasher is equipped.

Explanation of symbols

1 Dishwasher 2,200 Drain pipe (first water pipe)
20 Outflow side end (first end)
21 inflow port 22, 32 flange 2a outer surface 2b inner surface 3,300 connecting pipe (second flowing water pipe)
30 Inflow side end (second end)
33 Water storage flange 33a Flange bottom (bottom)
33b Flange side (side)
34 Inlet 3a Outer surface 4,400 Packing 4a Upper surface (surface)
4b Inner peripheral surface (surface)
4c Bottom surface (surface)
5 Ozone generator (gas generator)
A Tableware S1, S2, S3, S4 Water storage space

Claims (4)

A packing for preventing water leakage from the joint is disposed at the joint between the first and second flow pipes through which wash water for washing the dishes flows.
In a dishwasher comprising a gas generator for mixing corrosive gas for dishwashing assistance into the washing water,
A dishwasher characterized in that a water storage space for storing circulating wash water so as to cover the surface of the packing is formed in the vicinity of the joint. The inner diameter of the first end of the first water pipe is longer than the outer diameter of the second end of the second water pipe,
The second end is inserted into the first end;
The packing is interposed between the inner surface of the first end and the outer surface of the second end,
The dishwasher according to claim 1, wherein the water storage space is surrounded by the inner surface, the outer surface, and the surface. A flange is provided on each outer surface of one end of the first flowing water pipe and the second flowing water pipe on the joining side,
The packing is interposed between the flanges,
The water storage space is surrounded by the flange and the surface,
The dishwasher according to claim 1, wherein an inlet through which the washing water flows into the water storage space is formed. A water storage flange having a bottom portion projecting from the outer surface of the second water pipe and a side portion projecting from the bottom portion to the outside of the outer surface of the first water pipe, and in which the water storage space is formed;
The packing is interposed between the inner surface of the side portion and the outer surface of the first water pipe,
The dishwasher according to claim 1, wherein an inlet through which the washing water flows into the water storage space is formed.

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