JP2017129299A - Drain trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain trap capable of surely draining cleaning drain water that is discharged from a hot water storage type electric water heater, to a downstream side while preventing the cleaning drain water from being leaked indoors.SOLUTION: A drain trap 1 comprises: a cylindrical main body part 12 including a flow-out part 18, a ventilation part 20 and a trap formation part 22 and disposed to extend in a vertical direction; an injection nozzle part 14a which is provided in a top of the main body part and injects cleaning drain water to a lower side in a vertical direction; and a partition part 24 partitioning a space area S at an upper side of an encapsulation water level W0 within the main body part into an upper space area S1 and a lower space area S2. The partition part separates the upper space area and the lower space area from each other in an air-tight manner in a state where the cleaning drain water injected from the injection nozzle part into the main body part flows from the upper space area into the lower space area.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a drainage trap, and in particular, a drainage main pipe extending from a basin or kitchen sink trap and a hot water type electric water heater are connected, and hot water discharged from the hot water type electric water heater (hereinafter referred to as “washing”). This refers to a drain trap that drains wastewater into the drainage main.

Conventionally, in hot water storage type electric water heaters, hot water that has been installed in a washroom or kitchen, adjusted to an appropriate temperature and stored in a hot water tank is used to generate drinking water at the washbasin or kitchen sink side of the washroom. There is something.
In addition, such a conventional hot water storage type electric water heater has a function of automatically replacing hot water in a hot water tank with water when it is not used for a long period of time for consideration of hygiene for drinking water (hereinafter referred to as “hot water replacement function”). .) The hot water discharged from the hot water tank by this hot water replacement function (washing drainage) is not drained directly into the drainage main of the building, but the drainage main that extends from the toilet or kitchen trap, the hot water storage type electric water heater, It is drained to the drainage main pipe indirectly through a drainage hopper (drainage trap) installed between them (see, for example, Patent Document 1).
Furthermore, in such a conventional drainage trap described in Patent Document 1, an opening for securing a drainage outlet space is provided above it, and a hot water storage type electric water heater directly connected to a water supply pipe The sewage from the main drainage is prevented from flowing back.

JP 2011-158113 A

However, in the above-described conventional drain trap, for example, when a drain main extending from a kitchen sink trap and a hot water type electric water heater are connected, air that flows backward from the drain main due to sealed water in the trap of the kitchen sink. Therefore, if there is a factor that reduces the drainage capacity due to pressure loss such as clogging by foreign matter or deposits or reverse gradient construction in the downstream drainage main, There is a problem that the drainage capacity of the washing drainage exceeds the drainage capacity of the drainage main, and the drainage may accumulate in the drainage main.
At this time, a closed space is formed between the sealed water in the trap of the kitchen sink and the drainage reservoir in the downstream drainage main, and air (hereinafter referred to as “blocking air”) is accumulated in this space. There's a problem.
In addition, in this state where the closed space in the drain main is generated, if the washing drain discharged from the hot water type electric water heater continues to flow from the drain trap into the drain main, it flows into the drain main. The pressure of the blocked air increases by the volume of the washing waste water.
Then, due to the gradually increased pressure of the closed air, the cleaning drainage cannot flow from the drain trap to the drain main, and the cleaning drainage collects in the drain trap. There is a problem that the cleaning waste water leaks from the opening for ventilation and wets the indoor of the place where the drain trap is installed.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and the washing waste water discharged from the hot water storage type electric water heater can be surely drained downstream without causing water to leak indoors. It aims to provide a drain trap that can be used.

In order to achieve the above-mentioned object, the present invention connects the drainage main pipe extending from the basin or kitchen sink trap and the hot water type electric water heater to supply the washing wastewater discharged from the hot water type electric water heater. A drain trap for draining to a drain main, a cylindrical main body arranged so as to extend in the vertical direction, provided on a side of the main body and for cleaning waste water in the main body An outflow part that flows out to the pipe, a ventilation part provided above the outflow part, and the main body part provided with a trap forming part that forms a sealing surface in the main body part; and a top part of the main body part. An ejection nozzle part for ejecting cleaning wastewater discharged from the hot water storage type electric water heater vertically downward toward the main body part, and an upper space area and a lower space above the sealing surface in the main body part. region A partition portion that is divided into the partition portion, and the partition portion in the state in which the cleaning drainage sprayed into the main body portion from the ejection nozzle portion flows into the lower space region from the upper space region. The upper space region and the lower space region are hermetically separated from each other.
In the present invention configured as described above, the cleaning wastewater discharged from the hot water storage type electric water heater is ejected from the ejection nozzle portion into the main body portion and flows into the lower space region from the upper space region. Since the section partitions the upper space region and the lower space region in an airtight manner, the pressure in the lower space region can be prevented from escaping into the upper space region.
Therefore, when the waste water discharged from the hot water storage type electric water heater into the main body of the drain trap is drained from the outflow portion to the drain main that extends from the washbasin or the trap of the kitchen sink, no partition is provided. Compared to the case, the internal pressure of the drain trap (especially the pressure in the lower space area) can be effectively increased, so that the water pressure of the cleaning drainage drained from the drain trap drain into the drain main can be increased. it can.
Also, in the drain main pipe downstream of the drain trap, even if there is a factor that reduces drainage capacity due to pressure loss due to clogging due to foreign matters or deposits, reverse gradient construction, etc. The air staying in the drainage main can be pushed out to the trap side of the basin or kitchen sink by the pressure increased in the drainage trap, so that the increase in the pressure of the air staying in the drainage main is suppressed. Can do.
As a result, the drainage in the drainage mainstream downstream of the drainage trap is prevented from flowing back from the lower space area to the upper space area in the drainage trap and leaking from the vents etc. to the indoor area where the drainage trap is installed. In addition, the cleaning waste water discharged from the hot water storage type electric water heater into the drain trap can be surely drained to the drain main.

In this invention, Preferably, it further has a sealing member which seals between the said upper space area | region and the said lower space area | region.
In the present invention configured as described above, the cleaning wastewater leaks from between the upper space region and the lower space region by further including a seal member that seals between the upper space region and the lower space region. Can be prevented.
In addition, since the cleaning waste water ejected from the ejection nozzle portion flows into the lower space region through the upper space region, the air tightness between the upper space region and the lower space region can be more effectively increased. By increasing the internal pressure between the upper space region and the lower space region, it is possible to effectively increase the water pressure of the cleaning wastewater that is drained with respect to the air remaining in the drain main pipe.

In the present invention, preferably, the partition portion includes a truncated cone-shaped reduced diameter portion that divides the upper space region and the lower space region in the vertical direction and a nozzle portion that extends downward from a lower end of the reduced diameter portion. It has a funnel-shaped part.
In the present invention thus configured, the upper space region and the lower space region are vertically divided by the truncated cone-shaped reduced diameter portion of the funnel-shaped portion of the partition portion, and the nozzle portion of the funnel-shaped portion of the partition portion Thus, the cross-sectional area of the flow path where the upper space region and the lower space region communicate with each other can be narrowed down. Therefore, it is possible to increase the water pressure when the washing waste water ejected from the ejection nozzle portion into the main body portion passes through the nozzle portion from the upper space region and flows into the lower space region, and the air staying in the drain main pipe In contrast, the water pressure of the cleaning waste water drained can be increased more effectively.

In the present invention, preferably, the diameter of the nozzle portion is set to be substantially the same as the diameter of the ejection nozzle portion.
In the present invention configured as above, since the diameter of the nozzle portion is set to be substantially the same as the diameter of the ejection nozzle portion, the cleaning waste water ejected from the ejection nozzle portion into the main body portion is discharged from the upper space region to the nozzle. In the state of passing through the part, the communication between the upper space region and the lower space region can be blocked by filling the inside of the nozzle portion with the water flow ejected from the ejection nozzle portion.
Therefore, it is possible to prevent the pressure in the lower space region from escaping into the upper space region.

In this invention, Preferably, the lower end part of the said nozzle part inclines with respect to the major axis direction of the said nozzle part.
In the present invention configured as described above, the lower end portion of the nozzle portion is inclined with respect to the major axis direction of the nozzle portion, so that when the cleaning waste water ejected from the ejection nozzle portion is stopped, the nozzle It becomes difficult to form a water film due to the surface tension of the residual water at the lower end of the portion, and water drainage can be improved. Therefore, at the time of water stoppage, the upper space region and the lower space region can be communicated with each other by the nozzle portion and can be opened to the atmosphere by the ventilation portion, so that the generation of blocked air between the upper space region and the lower space region is prevented. Can be suppressed.

In the present invention, preferably, a drainage pipe member including the jet nozzle portion and extending from the hot water storage type electric water heater is connected, and the drainage member is disposed inside the connection member. A water passage is formed to allow the cleaning drainage discharged from the pipe member to the upstream connection portion to flow out to the nozzle portion, and the opening diameter of the downstream end portion of the ejection nozzle portion is the upstream end portion of the water passage. It is set to be smaller than the opening diameter.
In this invention comprised in this way, it further has the connection member to which the pipe member for drainage including an ejection nozzle part and extending from a hot water storage-type electric water heater is connected, The inside of this upstream connection part Is formed with a water passage that allows the washing waste water discharged from the drain pipe member to the upstream connection portion to flow out to the ejection nozzle portion, and the opening diameter of the downstream end portion of the ejection nozzle portion is the upstream end portion of the water passage Since the cleaning drainage discharged from the drainage pipe member to the water passage of the upstream connection portion and flowing into the ejection nozzle portion is set to be smaller than the opening diameter of the discharge nozzle portion, the downstream end portion of the ejection nozzle portion The washing waste water can be ejected from the opening in a state where the flow velocity is increased.
Therefore, the water pressure of the cleaning waste water drained with respect to the air staying in the drain main can be increased more effectively.

  According to the drain trap of the present invention, the washing drain discharged from the hot water storage type electric water heater can be surely drained to the downstream side without leaking indoors.

It is the front schematic diagram which shows the state installed about the drain trap by one Embodiment of this invention between the drain main which extends from the trap of a kitchen sink, and a hot water storage type electric water heater. It is front sectional drawing of the waste_water | drain trap by one Embodiment of this invention, and shows the state connected to the connection joint of the waste_water | drain main pipe | tube extended from the trap of a kitchen sink. It is the elements on larger scale which expanded the upper part of the drain trap by one Embodiment of this invention shown in FIG. It is the elements on larger scale which expanded the intermediate part of the up-down direction of the drain trap by one Embodiment of this invention shown in FIG. In the drain trap by one Embodiment of this invention, it is the figure which demonstrated schematically the state which drains the washing waste_water | drain discharged | emitted from the hot water storage type electric water heater to the drain main.

Hereinafter, a drain trap according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, FIG. 1 is a schematic front view showing a state where a drain trap according to an embodiment of the present invention is installed between a drain main extending from a trap of a kitchen sink and a hot water storage type electric water heater.
As shown in FIG. 1, the drain trap 1 according to the present embodiment is installed so as to connect a drain main pipe 6 extending from the trap 4 of the kitchen sink 2 and a hot water storage type electric water heater 8.
Here, the hot water storage type electric water heater 8 is adjusted to an appropriate temperature, and hot water stored in a hot water storage tank (not shown) in the hot water storage type electric water heater 8 is used for generating drinking water on the kitchen sink 2 side. Since it is the thing of a form and is the same as that of the structure of the conventional hot water storage type electric water heater, it abbreviate | omits about these detailed description.
Moreover, about the drainage of the expansion water etc. which generate | occur | produced in the hot water storage type electric water heater 8, and the hot water (washing drainage) discharged | emitted from the hot water storage tank (not shown) in the hot water storage type electric water heater 8 by the hot water replacement | exchange function, The hot water storage type electric water heater 8 flows through a drain hose 10 which is a pipe member for drainage and is discharged into the drain trap 1.
For example, in the hot water replacement function of the hot water storage type electric water heater 8, the solenoid valve (not shown) is opened and closed with a timer (not shown) in consideration of hygiene when no hot water is used for a long time. The hot water in the hot water storage tank (not shown) is mixed with water to 60 ° C. or lower, and the washing waste water is drained from the hot water storage type electric water heater 8 to the drain trap 1 at a flow rate of about 2 L / min.

Next, the structure of the drain trap 1 according to the present embodiment will be described in detail with reference to FIGS.
First, FIG. 2 is a front cross-sectional view of a drain trap according to an embodiment of the present invention, showing a state where the drain trap is connected to a connection joint of a drain main extending from the trap of the kitchen sink.
As shown in FIG. 2, the drain trap 1 includes a cylindrical main body 12 arranged to extend in the vertical direction, and a drain hose 10 provided from the top of the main body 12 and extending from the hot water storage type electric water heater 8. The hose coupling member 14 which is a connecting member to which the downstream end portion is connected is provided.
And in the inside of this hose coupling member 14, the ejection nozzle hole 14a which is an ejection nozzle part which ejects the washing waste_water | drain discharged | emitted from the hot water storage-type electric water heater 8 toward the inside of the main-body part 12 in the perpendicular direction is formed. ing.
Further, an outlet that is an outflow portion that allows the cleaning wastewater in the main body 12 to flow out to the drainage main pipe 6 through some connection joints 16 of the drainage main pipe 6 is provided on the side of the main body section 12 of the drain trap 1. 18 is formed, and a vent 20 as a vent is formed above the outlet 18.
Further, the drain trap 1 includes a lower inner cylindrical member 22 that is provided in the main body 12 and forms a sealing surface W0.
Further, the drain trap 1 includes an upper inner cylinder member 24 that is a partition that divides the space region S above the sealing surface W0 in the main body 12 into an upper space region S1 and a lower space region S2. As will be described in detail later, the upper inner cylindrical member 24 that is the partitioning portion is in a state in which the cleaning waste water ejected from the ejection nozzle hole 14a into the main body portion 12 flows into the lower space region S2 from the upper space region S1. Thus, the upper space region S1 and the lower space region S2 are separated from each other in an airtight manner.

Next, the main body 12 of the drain trap 1 specifically includes an upper outer cylinder member 26, a lower outer cylinder member 28 attached below the upper outer cylinder member 26, and the lower outer cylinder member. The bottom member 30 is attached to the bottom portion of 28.
Further, the upper outer cylinder member 26 and the lower outer cylinder member 28 have a longitudinal central axis of the main body 12 with the upper portion of the lower outer cylinder member 28 inserted into the lower portion of the upper outer cylinder member 26. Attached coaxially along C1.

Next, FIG. 3 is a partial enlarged cross-sectional view in which the upper part of the drain trap according to the embodiment of the present invention shown in FIG. 2 is enlarged.
As shown in FIGS. 2 and 3, the hose coupling member 14 is provided on the top of the upper outer cylinder member 26 of the main body 12. The ejection nozzle hole 14 a formed inside the hose coupling member 14 specifically forms a single ejection nozzle hole extending in the vertical direction along the central axis C <b> 1 of the main body 12.
Moreover, as shown in FIG.2 and FIG.3, the hose coupling member 14 is provided with the upstream connection part 38 to which the drainage hose 10 is connected. Inside the upstream side connection portion 38, a water passage 40 for allowing the washing waste water discharged from the hot water storage type electric water heater 8 through the drainage hose 10 to the upstream side connection portion 38 to flow into the ejection nozzle hole 14 a is connected to the upstream side connection. It is formed so as to extend from the portion 38 to the upper end portion (upstream end portion) of the ejection nozzle hole 14a.

Next, FIG. 4 is a partial enlarged cross-sectional view in which a middle portion in the vertical direction of the drain trap according to the embodiment of the present invention shown in FIG. 2 is enlarged.
As shown in FIG. 2 and FIG. 4, specifically, the outflow portion of the drain trap 1 forms an outlet 18 above the side of the lower outer cylinder member 28, and on the downstream side of the outlet 18. A downstream side connection portion 44 is provided and connected to the connection joint 16. A check valve 46 for preventing the drainage in the drainage main pipe 6 from flowing backward from the connection joint 16 into the outflow part 18 is provided in the water passage between the outlet 18 and the downstream connection part 44. It has been.
Further, as shown in FIGS. 2 and 3, the vent 20 that is the vent of the drain trap 1 is specifically formed by a plurality of vertically long arrays arranged in the circumferential direction above the side of the upper outer cylinder member 26. It consists of a vent and is for opening the upper space region S1 to the atmosphere.

Next, as shown in FIGS. 2 and 4, specifically, the lower inner cylinder member 22 that is a trap forming portion of the drain trap 1 is centered around the central axis C <b> 1 inside the lower outer cylinder member 28. It is arranged concentrically.
Further, as shown in FIGS. 2 and 4, the upper inner cylinder member 24 which is a partition portion of the drain trap 1 is specifically disposed concentrically around the central axis C <b> 1 inside the upper outer cylinder member 26. ing.
Here, the outer peripheral side mounting portion 22a of the upper part of the lower inner cylindrical member 22 is attached to the inner peripheral side mounting portion 28a of the upper portion of the lower outer cylindrical member 28, and both the mounting portions 28a, 22a An O-ring 54 is hermetically sealed in the gap so that the upper space region S1 and the lower space region S2 do not communicate with each other.

Further, as shown in FIGS. 2 and 4, the height of the sealing surface W0 of the sealed water inside the lower outer cylinder member 28 and the lower inner cylinder member 22 of the drain trap 1 is such that the washing drainage is the outlet 18. In the state before being discharged from the outlet 18, the height is substantially the same as the height of the lower end of the outlet 18.
Further, as shown in FIG. 2, in order to set the head pressure of the cleaning wastewater as high as possible, the height distance H1 from the lower end position P1 of the outlet 18 to the overflow surface W1 that is the lower end of the vent 20 is provided. Is set to 70 mm to 80 mm, for example.

Further, as shown in FIG. 4, an outer peripheral side mounting portion 24 a of a lower portion of the upper inner cylinder member 24 is attached to the inner peripheral side mounting portion 22 b of the upper portion of the lower inner cylindrical member 22. An O-ring 56 as a seal member is hermetically provided in the gap between the portions 22b and 24a so that the upper space region S1 and the lower space region S2 do not communicate with each other.
In the present embodiment, the O-ring 56 is used as a sealing member that seals the gap between the mounting portions 22b and 24a. However, other types of sealing members such as an X-ring and fillet packing are used. Also good.

Next, as shown in FIG. 4, the upper inner cylinder member 24 includes a funnel-shaped portion 62 including a reduced diameter portion 58 and a nozzle portion 60 inside thereof. The reduced diameter portion 58 is formed in a truncated cone shape so as to divide the upper space region S1 and the lower space region S2 in the vertical direction. The nozzle portion 60 is formed to extend downward from the lower end of the truncated cone-shaped reduced diameter portion 58.
As shown in FIG. 4, the lower end portion 60 a of the nozzle portion 60 is inclined with respect to the major axis direction (center axis C <b> 1) of the nozzle portion 60.
Further, as shown in FIG. 2, a vertical groove 64 is formed in a part above the side portion of the upper inner cylinder member 24 so as to cut through the inner side and the outer side of the upper inner cylinder member 24. The pressure in the upper space region S1 is released to the atmosphere via the vertical groove 64 and the vent 20.

  Next, as shown in FIG. 3, the opening diameter φ1 (for example, φ1 = 3.5 mm) of the downstream end of the ejection nozzle hole 14 a is the opening diameter of the upstream end of the water passage 40 of the hose coupling member 14. It is set to be smaller than φ2 (for example, φ2 = 4.0 mm). Accordingly, it is possible to eject cleaning waste water having an increased flow velocity from the ejection nozzle hole 14a.

Further, as shown in FIGS. 3 and 4, the diameter φ3 of the nozzle portion 60 is set to be substantially the same as the opening diameter φ1 (for example, φ1 = 3.5 mm) at the downstream end of the ejection nozzle hole 14a. .
The diameter φ3 of the nozzle portion 60 may be set to be equal to or larger than the opening diameter φ1 (for example, φ1 = 3.5 mm) at the downstream end portion of the ejection nozzle hole 14a.
However, if the diameter φ3 of the nozzle portion 60 is set to be larger than three times the opening diameter φ1 of the ejection nozzle hole 14a, the cleaning waste water ejected from the ejection nozzle hole 14a into the main body portion 12 is discharged from the upper space region S1 to the nozzle. Since it becomes difficult for the nozzle portion 60 to be filled with water flow and become watertight while passing through the portion 60, the communication between the upper space region S1 and the lower space region S2 may not be blocked. There is sex.
Therefore, even if the diameter φ3 of the nozzle portion 60 is set to be larger than the opening diameter φ1 of the ejection nozzle hole 14a, the diameter is smaller than three times the opening diameter φ1 of the ejection nozzle hole 14a (for example, φ1 = In the case of 3.5 mm, it is preferable to set φ3 = 8.0 mm).

  Furthermore, as shown in FIG. 4, it is preferable that the maximum length L1 from the base end portion (upper end portion) to the distal end portion (lower end portion) of the nozzle portion 60 is set to about 10 mm to 60 mm.

Below, with reference to FIGS. 1-5, the effect | action of the drain trap 1 by one Embodiment of this invention is demonstrated.
FIG. 5 is a diagram schematically illustrating a state in which cleaning wastewater discharged from a hot water storage type electric water heater is drained to a drainage main in a drain trap according to an embodiment of the present invention.
First, as shown in FIG. 1 to FIG. 3 and FIG. 5, the cleaning waste water W <b> 1 discharged from the hot water storage type electric water heater 8 to the drainage hose 10 by the hot water replacement function of the hot water storage type electric water heater 8 is After flowing into the water passage 40 of the upstream side connection portion 38, it passes through the water passage 40 and flows into the ejection nozzle hole 14 a.
As shown in FIGS. 2, 3, and 5, the cleaning waste water in the ejection nozzle hole 14 a is downstream of the ejection nozzle hole 14 a having an opening diameter φ 1 that is smaller than the opening diameter φ 2 at the upstream end of the water passage 40. Washing waste water is ejected from the opening at the side end with the flow velocity increased.
Next, as shown in FIGS. 2 to 5, the cleaning water jet f <b> 1 ejected from the ejection nozzle hole 14 a into the main body portion 12 flows into the upper space region S <b> 1 and then passes through the nozzle portion 60. Then flows into the lower space region S2. At this time, in the state where the cleaning water jet f1 passes through the nozzle portion 60, the nozzle portion 60 is filled with the water flow and is in a watertight state. Therefore, the communication between the upper space region S1 and the lower space region S2 is established. Blocked.
Therefore, the internal pressure of the drain trap 1 (particularly, the pressure in the lower space region S2) is more effective than when the upper inner cylinder member 24, which is a partition, is not provided in the main body 12 of the drain trap 1. Enhanced.
As a result, as shown in FIG. 5, the cleaning waste water W1 in the main body portion 12 of the drain trap 1 is drained from the outflow portion 18 of the drain trap 1 to the drain joint 16a inside the connection joint 16 in a state where the water pressure is increased. It is drained into the drainage main pipe 6 via.

Moreover, as shown in FIG. 5, in the drain main pipe 6 on the downstream side of the drain trap 1, the drainage capacity is reduced by, for example, clogging B due to foreign matter or deposits, pressure loss due to reverse gradient construction, or the like. Even in the state where the factor has occurred, the pressure increased in the drain trap 1 has increased in the pressure Q (see FIG. 5) in the trap 4 of the kitchen sink 2 and stayed in the drain main pipe 6. Push air A to the trap 4 side of the kitchen sink 2 and let it escape. Thereby, the pressure rise of the obstruction | occlusion air A which retains in the drainage main pipe 6 is suppressed.
Eventually, the drainage in the drainage main pipe 6 on the downstream side of the drainage trap 1 does not flow backward from the lower space area S2 to the upper space area S1 in the drainage trap 1 and goes to the downstream side of the drainage main pipe 6. It is surely drained.

According to the drain trap 1 according to the above-described embodiment of the present invention, the cleaning waste water discharged from the hot water storage type electric water heater 8 is jetted into the main body portion 12 from the jet nozzle hole 14a, and the upper space region S1 to the lower space region. Since the upper inner cylinder member 24 hermetically separates the upper space region S1 and the lower space region S2 from each other in a state of flowing into S2, the pressure in the lower space region S2 is increased in the upper space region S1. Can prevent you from escaping.
Therefore, when the cleaning wastewater discharged from the hot water storage type electric water heater 8 into the main body portion 12 of the drain trap 1 is drained from the outflow portion 18 to the drain main 6 extending from the trap 4 of the kitchen sink 2, the partition portion Compared to the case where the upper inner cylinder member 24 is not provided, the internal pressure of the drain trap 1 (particularly, the pressure in the lower space region S2) can be effectively increased. Thus, the water pressure of the washing waste water drained into the drain main pipe 6 can be increased.
Also, in the drain main pipe 6 on the downstream side of the drain trap 1, there is a factor that causes a decrease in drainage capacity due to pressure loss due to, for example, clogging with foreign matter or deposits or reverse gradient construction. However, the air staying in the drainage main pipe 6 can be released by being pushed out to the trap 4 side of the kitchen sink 2 by the pressure increased in the drainage trap 1. The pressure rise can be suppressed.
As a result, the drainage in the drainage main pipe 6 on the downstream side of the drainage trap 1 flows backward from the lower space region S2 to the upper space region S1 in the drainage trap 1, and the installation location of the drainage trap 1 from the vent 20 or the like. Water can be prevented from leaking indoors, and the washing waste water discharged from the hot water storage type electric water heater 8 into the drain trap 1 can be reliably drained to the drain main pipe 6.

Moreover, according to the drain trap 1 of this embodiment, the upper space region S1 and the lower space region S2 are further provided by further including an O-ring 56 that is a seal member that seals between the upper space region S1 and the lower space region S2. It is possible to prevent the washing waste water from leaking out between the two.
In addition, in the state where the washing waste water ejected from the ejection nozzle hole 14a flows into the lower space region S2 through the upper space region S1, the mutual airtightness of the upper space region S1 and the lower space region S2 is more effectively achieved. Therefore, it is possible to increase the internal pressure between the upper space region S1 and the lower space region S2 and effectively increase the water pressure of the cleaning drainage discharged to the air staying in the drain main. it can.

Furthermore, according to the drain trap 1 of the present embodiment, the upper space region S1 and the lower space region S2 are divided in the vertical direction by the truncated cone-shaped reduced diameter portion 58 of the funnel-shaped portion 62 of the upper inner cylinder member 24, The cross-sectional area S1 (see FIG. 4) where the upper space region S1 and the lower space region S2 communicate with each other can be narrowed down by the nozzle portion 60 of the funnel-shaped portion 62 of the upper inner cylinder member 24.
Accordingly, it is possible to increase the water pressure when the washing waste water ejected from the ejection nozzle hole 14a into the main body portion 12 passes through the nozzle portion 60 from the upper space region S1 and flows into the lower space region S2. The water pressure of the washing waste water drained with respect to the air staying in 6 can be increased more effectively.

Further, according to the drain trap 1 of the present embodiment, the diameter φ3 of the nozzle portion 60 is set to be substantially the same as the opening diameter φ1 (for example, φ1 = 3.5 mm) at the downstream end portion of the ejection nozzle hole 14a. Therefore, in the state in which the washing waste water ejected from the ejection nozzle hole 14a into the main body portion 12 passes through the nozzle portion 60 from the upper space region S1, the water flow ejected from the ejection nozzle hole 14a in the nozzle portion 60 By satisfy | filling by, communication with upper space area | region S1 and lower space area | region S2 can be interrupted | blocked.
Therefore, it is possible to prevent the pressure in the lower space region S2 from escaping into the upper space region S1.

Furthermore, according to the drain trap 1 of the present embodiment, the lower end portion 60a of the nozzle portion 60 is ejected from the ejection nozzle hole 14a by being inclined with respect to the major axis direction (center axis C1) of the nozzle portion 60. When the washing waste water is stopped, it becomes difficult to form a water film due to the surface tension of the residual water at the lower end portion 60a of the nozzle portion 60, and the water drainage can be improved.
Therefore, at the time of water stoppage, the upper space region S1 and the lower space region S2 can be communicated with each other by the nozzle portion 60 and can be opened to the atmosphere by the vent hole 20, so that the space between the upper space region S1 and the lower space region S2 is Generation | occurrence | production of the obstruction | occlusion air in can be suppressed.

Moreover, according to the drainage trap 1 of the present embodiment, the upstream side connection portion 38 of the hose coupling member 14 to which the drainage hose 10 provided on the upstream side of the ejection nozzle hole 14a and extending from the hot water storage type electric water heater 8 is connected. Furthermore, a water passage 40 is formed inside the upstream connection portion 38 to allow the cleaning wastewater discharged from the drainage hose 10 to the upstream connection portion 38 to flow out to the ejection nozzle hole 14a. The opening diameter φ1 (for example, φ1 = 3.5 mm) at the downstream end of 14a is smaller than the opening diameter φ2 (for example, φ2 = 4.0 mm) at the upstream end of the water passage 40 of the hose coupling member 14. It is set to be.
Accordingly, the cleaning wastewater discharged from the drainage hose 10 to the water passage 40 of the upstream connection portion 38 and flowing into the ejection nozzle hole 14a is washed in a state where the flow velocity is increased from the downstream end of the ejection nozzle hole 14a. Can be ejected.
Therefore, the water pressure of the cleaning waste water drained with respect to the air staying in the drain main pipe 6 can be increased more effectively.

  In addition, in the drain trap 1 by this embodiment mentioned above, although the form applied as the drain trap 1 which connects the drain main 6 extended from the trap 4 of the kitchen sink 2 and the hot water storage type electric water heater 8 was demonstrated, The present invention is not limited to such a configuration, and the present invention can be applied to a drain trap that connects a drain main pipe extending from a basin trap and a hot water storage type electric water heater.

In the drain trap 1 according to the present embodiment, the O-ring 56 is provided between the inner peripheral side mounting portion 22b of the lower inner cylindrical member 22 and the outer peripheral side mounting portion 24a of the upper inner cylindrical member 24, thereby In the state where the cleaning waste water sprayed into the main body 12 from the nozzle hole 14a passes through the nozzle portion 60 from the upper space region S1 and flows into the lower space region S2, the upper space region S1 and the lower space region S2 are separated. Although the embodiment of hermetically dividing each other has been described, other embodiments can be implemented.
For example, the upper space region S1 and the lower space region in a state in which the cleaning waste water ejected from the ejection nozzle hole 14a into the main body portion 12 passes through the nozzle portion 60 from the upper space region S1 and flows into the lower space region S2. As another embodiment which is a partition part for separating S2 from each other in an airtight manner, an O is provided between the inner peripheral side mounting part 22b of the lower inner cylindrical member 22 and the outer peripheral side mounting part 24a of the upper inner cylindrical member 24. Instead of providing the ring 56, the upper inner cylinder member 24 may be press-fitted into the lower inner cylinder member 22.
Further, the trap forming portion and the partition portion may be integrally provided by integrally molding the lower inner cylinder member 22 and the upper inner cylinder member 24.

DESCRIPTION OF SYMBOLS 1 Drain trap 2 Kitchen sink 4 Kitchen sink trap 6 Drain main 8 Hot water storage type electric water heater 10 Drain hose (drain pipe)
12 Body 14 Hose joint member (connection member)
14a Ejection nozzle hole (Ejection nozzle part)
16 Connection joint 16a Drainage channel 18 Outlet (outflow part)
20 Vent (vent)
22 Lower inner cylinder member (trap forming part)
22a Outer peripheral side mounting part 22b Inner peripheral side mounting part 24 Upper inner cylinder member (partition part)
24a Outer peripheral side mounting part 26 Upper outer cylinder member (main body part)
28 Lower outer cylinder member (main body)
28a Inner peripheral side mounting part 30 Bottom member (main body part)
38 Upstream connection part of hose joint member 40 Water passage of hose joint member (water passage of connection member)
44 Downstream connection (outflow)
46 Check valve 54 O-ring 56 O-ring (seal member)
58 Reduced diameter portion 60 Nozzle portion 60a Lower end portion of nozzle portion 62 Funnel-shaped portion 64 Vertical groove A Air (blocking air)
B Clogging C1 Center axis in the longitudinal direction of the main body C2 Center axis of the water passage in the upstream connection portion of the hose joint member f1 Jet H1 Height distance from the lower end position of the outlet to the overflow surface which is the lower end of the vent P1 Flow Height position of the lower end of the outlet P2 Height position of the upper end portion of the ejection nozzle hole Q Pressure in the trap of the kitchen sink S Space region above the sealed surface in the main body S1 Upper space region S2 Lower space region W0 Sealed surface W1 Overflow surface φ1 Opening diameter of the downstream end of the jet nozzle hole φ2 Opening diameter of the upstream end of the water passage of the hose joint member φ3 Diameter of the nozzle

Claims (6)

A drainage trap that drains cleaning drainage discharged from the hot water storage type electric water heater to the drainage main pipe by connecting a drainage main pipe extending from a trap of a basin or kitchen sink and a hot water storage type electric water heater,
It is a cylindrical main body arranged so as to extend in the vertical direction, and is provided on the side of the main body so as to flow out the cleaning wastewater in the main body to the drainage main, more than the outflow The main body portion provided with a ventilation portion provided above, and the trap forming portion for forming a sealing surface in the main body portion, and
A jet nozzle part that is provided at the top of the main body part and ejects cleaning wastewater discharged from the hot water storage type electric water heater vertically downward toward the main body part,
A partition section that divides a space area above the sealing surface in the main body section into an upper space area and a lower space area;
The partition portion connects the upper space region and the lower space region to each other in a state in which the cleaning wastewater ejected from the ejection nozzle portion into the main body portion flows into the lower space region from the upper space region. Drainage trap characterized by airtight classification.   The drain trap according to claim 1, further comprising a seal member for sealing between the upper space region and the lower space region.   The partition portion includes a funnel-shaped portion including a truncated cone-shaped reduced diameter portion that divides the upper space region and the lower space region in the vertical direction and a nozzle portion extending downward from the lower end of the reduced diameter portion. The drainage trap according to claim 1 or 2.   The drain trap according to claim 3, wherein a diameter of the nozzle portion is set to be substantially the same as a diameter of the ejection nozzle portion.   The drain trap according to claim 3 or 4, wherein a lower end portion of the nozzle portion is inclined with respect to a major axis direction of the nozzle portion. Furthermore, it has a connection member to which a pipe member for drainage including the jet nozzle part and extending from the hot water storage type electric water heater is connected,
Inside this connection member, a water passage is formed to allow the washing wastewater discharged from the drainage pipe member to flow out to the ejection nozzle part,
The drainage trap according to any one of claims 1 to 5, wherein an opening diameter of a downstream end portion of the ejection nozzle portion is set to be smaller than an opening diameter of an upstream end portion of the water passage. .

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